🇺🇦 The prisoners of the Armed Forces of Ukraine are outraged that the Ukrainian authorities are only interested in Azov, and they don’t care about the rest.
They appealed to Zelensky
“We are servicemen of the Armed Forces of Ukraine, now we are in captivity of the Russian Federation. We’ve been here for over a month and no one cares about us. Everyone is puzzled only by the Azov regiment. For some reason, no one asks all the presidents of Europe, the Pope, Elon Musk to assist in our exchange. We also have families and children. When we were needed, we fulfilled our duty. Why don’t anybody help us now ?“
As many as six million British households could be subjected to power cuts this winter if Russian gas supplies to Europe stop, The Times reported Sunday, citing a Whitehall document.
It said that imports of natural gas from Norway could halve next winter amid surging EU demand. Britain buys around half of its total supplies from the Nordic country.
Shipments of liquified natural gas from major producers such as the United States and Qatar could also halve this winter, the UK government warned, pointing to fierce global competition for supplies of the fuel.
Meanwhile, interconnectors from the Netherlands and Belgium could also be cut off in winter, as the two countries struggle meeting their own demand.
The UK, which has vowed to end the importation of Russian oil by the end of the year, is now seeking to bolster electricity supply by extending the life of its coal and aging nuclear power stations
11-Year-Old Girl From Brazil Died Four Days After She Was Threatened and Forced to Take COVID Vaccine
THE VACCINE DEATH REPORT
EVIDENCE OF MILLIONS OF DEATHS AND HUNDREDS OF MILLIONS OF SERIOUS ADVERSE EVENTS RESULTING FROM THE EXPERIMENTAL COVID INJECTIONS
The Vaccine Death Report shows all the scientific evidence that millions of innocent people lost their lives and hundreds of millions are suffering crippling side effects, after being injected with the experimental covid injections. The report exposes the strategic methods used by governments and health agencies to hide 99% of all vaccine injuries and deaths. You will also learn who is really behind all of this, and what their true agenda is.
The report also shows horrifying lab results from microscopic investigation of some vaccine vials: living creatures with tentacles, as well as self-assembling nanorobots. See pictures:
These creatures and self-assembling and self-replicating nanobots are present in some of the vaccines!
The Vaccine Death Report contains a tremendous amount of critical information, that you will find nowhere else in such a comprehensive and well organized format. It ends with a strong message of hope, that will greatly empower you.
This report is a critical alarm call to the world. Download it now, and distribute it far and wide.
Now if you have been paying attention to my blogs, you will already see what is happening here. These scientists ( if they exist ) are well paid to say whatever they are told to say.
The vaccines ( Kill shots ) have been causing almost every blood disorder on the planet. Although some are not reported because the doctors think it’s just normal cancer of the blood because of the backlog.
But none can deny that Myocarditis is a direct result of the vaccine ( kill shot )
Once a rare disorder in those under 24 years of age and even more rare in those under 14 years of age has become a vivid scene for undertaken. But more than that it has become a sad and devastating reality for thousands of parents and sisters and brothers and families of those who have died. Over a thousand professional sports players have collapsed or died in the middle of a game.
I lost 9 very good friends last year and many acquaintances. This year already I have lost one family member and 4 acquaintances. That’s 14 people. One young girl who was a friend of my daughter’s age 23, died 7 days after her vaccine of a brain haemorrhage. One very close friend died of cancer a short time after his vaccine. His vaccine brought back his cancer so quickly and aggressively that it killed him within a week. I was outside his hospital door unable to go in a few hours before he died. He was 55 years old.
Anyway back to myocarditis. Monkeypox is being made out to be a small matter at the moment. But I can assure you that it will be a pandemic. They are building up to it slowly because covid is dying out in people’s minds because of the work people called conspiracy theorists do.
So because myocarditis is proven to be the cause of vaccine damage and there’s no informed consent, the government are being held reliable. And we all know that the government do not like to give the people the money that they are entitled to.
Even the emergency use authorisation ( EUA ) should not still be active because the pandemic is over. But still, even though they know that the kill shots are causing millions of deaths and millions of injuries, they have used an illegal EUA to allow untested kill shots knowing that thousands of you will die. But of course, it’s all to do with your health.
Lockdown and all the other restrictions were killers that didn’t work too. Or Lockstep I like to call it. Did you know that 192 countries all scrapped their decades-old pandemic mandates at the same time and mysteriously all followed the same New rules set out by the 192 countries WITHOUT supposedly contacting any of the other leaders etc?
Every country is the same. Except for China! They had the lab leak and there were videos of people falling dead in the street. 🙄
But now look at them. They did their bit and didn’t have to pretend anymore.
There is no smallpox in the world!
The approved drug causes heart damage, myocarditis, and pericarditis, but the DOD, in its quest to decimate the American military allowed it in 2018.
The US government has millions of doses, even though there aren’t confirmed smallpox cases.
And the UK just ordered tens of thousands of the monkeypox kill shots as planned but, Don’t work. They will cause the deaths that are mentioned and just like Covid, only the vaccinated will get so-called monkeypox, become unwell or die. But this won’t target the elderly, this will target anyone who has no critical thinking and is clouded by the media telling them they are conspiracy theories.
here’s a paragraph from a book on viruses. The good thing about books is Google and Wikipedia can not edit them. Have a read on monkeypox
There is a video here you can watch by Dr Jane Ruby.
The link below for a video if you would like to hear a video from a professional.
Today you will hear Dr Jane Ruby Show, where she speaks about the latest combination of Smallpox/Monkeypox vaccines, approved four years ago!
Thank you for reading.
Please share this with everyone. I’m not after the followers so they don’t have to sign up and like them. I’m doing my bit by researching everything I have sent to myself, watching government websites worldwide and the CDC, WHO, WEF, NIH, CHAN ZUCKERBERG and many more websites.
Remember that the Americans are blaming Russia for everything. You name it and it will be Russian disinformation.
Well if you look at my blog “ what’s happening really in Ukraine “ you will see firsthand footage of the citizens speaking out, and plenty of other Russian Ukraine war and other updates.
Please remember to share and stop this fake monkeypox kill shot from being put into every one. Save lives, don’t let them take the shot.
Ivermectin has powerful antitumor effects, including the inhibition of proliferation, metastasis, and angiogenic activity, in a variety of cancer cells. This may be related to the regulation of multiple signaling pathways by ivermectin through PAK1 kinase. On the other hand, ivermectin promotes programmed cancer cell death, including apoptosis, autophagy and pyroptosis. Ivermectin induces apoptosis and autophagy is mutually regulated. Interestingly, ivermectin can also inhibit tumor stem cells and reverse multidrug resistance and exerts the optimal effect when used in combination with other chemotherapy drugs.
Abbreviations: ASC, Apoptosis-associated speck-like protein containing a CARD; ALCAR, acetyl-L-carnitine; CSCs, Cancer stem cells; DAMP, Damage-associated molecular pattern; EGFR, Epidermal growth factor receptor; EBV, Epstein-Barr virus; EMT, Epithelial mesenchymal-transition; GABA, Gamma-aminobutyric acid; GSDMD, Gasdermin D; HBV, Hepatitis B virus; HCV, Hepatitis C virus; HER2, Human epidermal growth factor receptor 2; HMGB1, High mobility group box-1 protein; HSP27, Heat shock protein 27; LD50, median lethal dose; LDH, Lactate dehydrogenase; IVM, Ivermectin; MDR, Multidrug resistance; NAC, N-acetyl-L-cysteine; OCT-4, Octamer-binding protein 4; PAK1, P-21-activated kinases 1; PAMP, Pathogen-associated molecular pattern; PARP, poly (ADP- ribose) polymerase; P-gp, P-glycoprotein; PRR, pattern recognition receptor; ROS, Reactive oxygen species; STAT3, Signal transducer and activator of transcription 3; SID, SIN3-interaction domain; siRNA, small interfering RNA; SOX-2, SRY-box 2; TNBC, Triple-negative breast cancer; YAP1, Yes-associated protein 1
Chemical compounds reviewed in this article: ivermectin(PubChem CID：6321424), avermectin(PubChem CID：6434889), selamectin(PubChem CID：9578507), doramectin(PubChem CID：9832750), moxidectin(PubChem CID：9832912)
Keywords: ivermectin, cancer, drug repositioning
Ivermectin is a macrolide antiparasitic drug with a 16-membered ring that is widely used for the treatment of many parasitic diseases such as river blindness, elephantiasis and scabies. Satoshi ōmura and William C. Campbell won the 2015 Nobel Prize in Physiology or Medicine for the discovery of the excellent efficacy of ivermectin against parasitic diseases. Recently, ivermectin has been reported to inhibit the proliferation of several tumor cells by regulating multiple signaling pathways. This suggests that ivermectin may be an anticancer drug with great potential. Here, we reviewed the related mechanisms by which ivermectin inhibited the development of different cancers and promoted programmed cell death and discussed the prospects for the clinical application of ivermectin as an anticancer drug for neoplasm therapy.
Ivermectin(IVM) is a macrolide antiparasitic drug with a 16-membered ring derived from avermectin that is composed of 80% 22,23-dihydroavermectin-B1a and 20% 22,23-dihydroavermectin-B1b . In addition to IVM, the current avermectin family members include selamectin, doramectin and moxidectin [, , , ] (Fig. 1 ). IVM is currently the most successful avermectin family drug and was approved by the FDA for use in humans in 1978 . It has a good effect on the treatment of parasitic diseases such as river blindness, elephantiasis, and scabies. The discoverers of IVM, Japanese scientist Satoshi ōmura and Irish scientist William C. Campbell, won the Nobel Prize in Physiology or Medicine in 2015 [7,8]. IVM activates glutamate-gated chloride channels in the parasite, causing a large amount of chloride ion influx and neuronal hyperpolarization, thereby leading to the release of gamma-aminobutyric acid (GABA) to destroy nerves, and the nerve transmission of muscle cells induces the paralysis of somatic muscles to kill parasites [9,10]. IVM has also shown beneficial effects against other parasitic diseases, such as malaria [11,12], trypanosomiasis , schistosomiasis , trichinosis  and leishmaniasis .
The chemical structures of ivermectin and other avermectin family compounds in this review.
IVM not only has strong effects on parasites but also has potential antiviral effects. IVM can inhibit the replication of flavivirus by targeting the NS3 helicase ; it also blocks the nuclear transport of viral proteins by acting on α/β-mediated nuclear transport and exerts antiviral activity against the HIV-1 and dengue viruses . Recent studies have also pointed out that it has a promising inhibitory effect on the SARS-CoV-2 virus, which has caused a global outbreak in 2020 . In addition, IVM shows potential for clinical application in asthma  and neurological diseases . Recently scientists have discovered that IVM has a strong anticancer effect.
Since the first report that IVM could reverse tumor multidrug resistance (MDR) in 1996 , a few relevant studies have emphasized the potential use of IVM as a new cancer
treatment [, , , , ]. Despite the large number of related studies, there are still some key issues that have not been resolved. First of all, the specific mechanism of IVM-mediated cytotoxicity in tumor cells is unclear; it may be related to the effect of IVM on various signaling pathways, but it is not very clear overall. Second, IVM seems to induce mixed cell death in tumor cells, which is also a controversial issue. Therefore, this review summarized the latest findings on the anticancer effect of IVM and discussed the mechanism of the inhibition of tumor proliferation and the way that IVM induces tumor programmed cell death to provide a theoretical basis for the use of IVM as a potential anticancer drug. As the cost of the research and development of new anticancer drugs continues to increase, drug repositioning has become increasingly important. Drug repositioning refers to the development of new drug indications that have been approved for clinical use . For some older drugs that are widely used for their original indications and have clinical data and safety information, drug repositioning allows them to be developed via a cheaper and faster cycle and to be used more effectively in clinical use clinically . Here, we systematically summarized the anticancer effect and mechanism of IVM, which is of great significance for the repositioning of IVM for cancer treatment.
2. The role of IVM in different cancers
2.1. Breast cancer
Breast cancer is a malignant tumor produced by gene mutation in breast epithelial cells caused by multiple carcinogens. The incidence of breast cancer has increased each year, and it has become one of the female malignant tumors with the highest incidence in globally. On average, a new case is diagnosed every 18 seconds worldwide [30,31]. After treatment with IVM, the proliferation of multiple breast cancer cell lines including MCF-7, MDA-MB-231 and MCF-10 was significantly reduced. The mechanism involved the inhibition by IVM of the Akt/mTOR pathway to induce autophagy and p-21-activated kinase 1(PAK1)was the target of IVM for breast cancer . Furthermore, Diao’s study showed that IVM could inhibit the proliferation of the canine breast tumor cell lines CMT7364 and CIPp by blocking the cell cycle without increasing apoptosis, and the mechanism of IVM may be related to the inhibition of the Wnt pathway .
Triple-negative breast cancer (TNBC) refers to cancer that is negative for estrogen receptor, progesterone receptor, and human epidermal growth factor receptor 2(HER2) and is the most aggressive subtype of breast cancer with the worst prognosis. In addition, there is also no clinically applicable therapeutic drug currently [34,35]. A drug screening study of TNBC showed that IVM could be used as a SIN3-interaction domain (SID) mimic to selectively block the interaction between SID and paired a-helix2. In addition, IVM regulated the expression of the epithelial mesenchymal-transition (EMT) related gene E-cadherin to restore the sensitivity of TNBC cells to tamoxifen, which implies the possibility that IVM functions as an epigenetic regulator in the treatment of cancer.
Recent studies have also found that IVM could promote the death of tumor cells by regulating the tumor microenvironment in breast cancer. Under the stimulation of a tumor microenvironment with a high level of adenosine triphosphate (ATP) outside tumor cells, IVM could enhance the P2 × 4/ P2 × 7/Pannexin-1 mediated release of high mobility group box-1 protein (HMGB1) . However, the release of a large amount of HMGB1 into the extracellular environment will promote immune cell-mediated immunogenic death and inflammatory reactions, which will have an inhibitory effect on the growth of tumor cells. Therefore, we believe that the anticancer effect of IVM is not limited to cytotoxicity, but also involves the regulation of the tumor microenvironment. IVM regulates the tumor microenvironment and mediates immunogenic cell death, which may be a new direction for research exploring anticancer mechanisms in the future.
2.2. Digestive system cancer
Gastric cancer is one of the most common malignant tumors worldwide. In the past year, more than one million patients with gastric cancer have been diagnosed worldwide . Nambara’s study showed that IVM could significantly inhibit the proliferation of gastric cancer cells in vivo and in vitro and that the inhibitory effect of IVM depended on the expression of Yes-associated protein 1(YAP1). The gastric cancer cell lines MKN1 and SH-10-TC have higher YAP1 expression than MKN7 and MKN28 cells, so MKN1 and SH-10-TC cells are sensitive to IVM, while MKN7 and MKN28 are not sensitive to IVM.YAP1 plays an oncogenic role in tumorigenesis, indicating the possibility of the use of IVM as a YAP1 inhibitor for cancer treatment .
In a study that screened Wnt pathway inhibitors, IVM inhibited the proliferation of multiple cancers, including the colorectal cancer cell lines CC14, CC36, DLD1, and Ls174 T, and promoted apoptosis by blocking the Wnt pathway . After intervention with IVM, the expression of caspase-3 in DLD1 and Ls174 T cells increased, indicating that IVM has an apoptosis-inducing effect and inhibits the expression of the downstream genes AXIN2, LGR5, and ASCL2 in the Wnt/β-catenin pathway. However, the exact molecular target of IVM that affects the Wnt/β-catenin pathway remains to be explored.
Hepatocellular carcinoma is the fourth leading cause of cancer death worldwide. Approximately 80% of cases of liver cancer are caused by hepatitis B virus (HBV) and hepatitis C virus (HCV) infection . IVM could inhibit the development of hepatocellular carcinoma by blocking YAP1 activity in spontaneous liver cancer Mob1b-/-mice .Cholangiocarcinoma is a malignant tumor that originates in the bile duct inside and outside the liver. Intuyod’s experiment found that IVM inhibited the proliferation of KKU214 cholangiocarcinoma cells in a dose- and time-dependent manner . IVM halted the cell cycle in S phase and promoted apoptosis. Surprisingly, gemcitabine-resistant KKU214 cells showed high sensitivity to IVM, which suggested that IVM shows potential for the treatment of tumors that are resistant to conventional chemotherapy drugs.
2.3. Urinary system cancer
Renal cell carcinoma is a fatal malignant tumor of the urinary system derived from renal tubular epithelial cells. Its morbidity has increased by an average of 2% annually worldwide and the clinical treatment effect is not satisfactory [, , ]. Experiments confirmed that IVM could significantly inhibit the proliferation of five renal cell carcinoma cell lines without affecting the proliferation of normal kidney cells, and its mechanism may be related to the induction of mitochondrial dysfunction . IVM could significantly reduce the mitochondrial membrane potential and inhibit mitochondrial respiration and ATP production. The presence of the mitochondrial fuel acetyl-L-carnitine (ALCAR), and the antioxidant N-acetyl-L-cysteine (NAC), could reverse IVM-induced inhibition. In animal experiments, the immunohistochemical results for IVM-treated tumor tissues showed that the expression of the mitochondrial stress marker HEL was significantly increased, and the results were consistent with those of the cell experiments.
Prostate cancer is a malignant tumor derived from prostate epithelial cells, and its morbidity is second only to that of lung cancer among men in Western countries . In Nappi’s experiment, it was found that IVM could enhance the drug activity of the anti-androgen drug enzalutamide in the prostate cancer cell line LNCaP and reverse the resistance of the prostate cancer cell line PC3 to docetaxel . Interestingly, IVM also restored the sensitivity of the triple-negative breast cancer to the anti-estrogen drug tamoxifen , which also implies the potential for IVM to be used in endocrine therapy. Moreover, IVM was also found to have a good inhibitory effect on the prostate cancer cell line DU145 .
2.4. Hematological cancer
Leukemia is a type of malignant clonal disease caused by abnormal hematopoietic stem cells . In an experiment designed to screen potential drugs for the treatment of leukemia, IVM preferentially killed leukemia cells at low concentrations without affecting normal hematopoietic cells . The mechanism was related to the increase in the influx of chloride ions into the cell by IVM, resulting in hyperpolarization of the plasma membrane and induction of reactive oxygen species (ROS) production. It was also proven that IVM has a synergistic effect with cytarabine and daunorubicin on the treatment of leukemia. Wang’s experiment found that IVM could selectively induce mitochondrial dysfunction and oxidative stress, causing chronic myeloid leukemia K562 cells to undergo increased caspase-dependent apoptosis compared with normal bone marrow cells . It was also confirmed that IVM inhibited tumor growth in a dose-dependent manner, and dasatinib had improved efficacy.
2.5. Reproductive system cancer
Cervical cancer is one of the most common gynecological malignancies, resulting in approximately 530,000 new cases and 270,000 deaths worldwide each year. The majority of cervical cancers are caused by human papillomavirus (HPV) infection [54,55]. IVM has been proven to significantly inhibit the proliferation and migration of HeLa cells and promote apoptosis . After intervention with IVM, the cell cycle of HeLa cells was blocked at the G1/S phase, and the cells showed typical morphological changes related to apoptosis.
Ovarian cancer is a malignant cancer that lacks early clinical symptoms and has a poor therapeutic response. The 5-year survival rate after diagnosis is approximately 47% [27,57]. In a study by Hashimoto, it found that IVM inhibited the proliferation of various ovarian cancer cell lines, and the mechanism was related to the inhibition of PAK1 kinase . In research to screen potential targets for the treatment of ovarian cancer through the use of an shRNA library and a CRISPR/Cas9 library, the oncogene KPNB1 was detected. IVM could block the cell cycle and induce cell apoptosis through a KPNB1-dependent mechanism in ovarian cancer . Interestingly, IVM and paclitaxel have a synergistic effect on ovarian cancer, and combined treatment in in vivo experiments almost completely inhibited tumor growth. Furthermore, according to a report by Zhang, IVM can enhance the efficacy of cisplatin to improve the treatment of epithelial ovarian cancer, and the mechanism is related to the inhibition of the Akt/mTOR pathway .
2.6. Brain glioma
Glioma is the most common cerebral tumor and approximately 100,000 people worldwide are diagnosed with glioma every year. Glioblastoma is the deadliest glioma, with a median survival time of only 14-17 months [61,62]. Experiments showed that IVM inhibited the proliferation of human glioblastoma U87 and T98 G cells in a dose-dependent manner and induced apoptosis in a caspase-dependent manner . This was related to the induction of mitochondrial dysfunction and oxidative stress. Moreover, IVM could induce apoptosis of human brain microvascular endothelial cells and significantly inhibit angiogenesis. These results showed that IVM had the potential to resist tumor angiogenesis and tumor metastasis. In another study, IVM inhibited the proliferation of U251 and C6 glioma cells by inhibiting the Akt/mTOR pathway .
In gliomas, miR-21 can regulate the Ras/MAPK signaling pathway and enhance its effects on proliferation and invasion . The DDX23 helicase activity affects the expression of miR-12 . IVM could inhibit the DDX23/miR-12 signaling pathway by affecting the activity of DDX23 helicase, thereby inhibiting malignant biological behaviors. This indicated that IVM may be a potential RNA helicase inhibitor and a new agent for of tumor treatment. However, here, we must emphasize that because IVM cannot effectively pass the blood-brain barrier , the prospect of the use of IVM in the treatment of gliomas is not optimistic.
2.7. Respiratory system cancer
Nasopharyngeal carcinoma is a malignant tumor derived from epithelial cells of the nasopharyngeal mucosa. The incidence is obviously regional and familial, and Epstein-Barr virus (EBV) infection is closely related . In a study that screened drugs for the treatment of nasopharyngeal cancer, IVM significantly inhibited the development of nasopharyngeal carcinoma in nude mice at doses that were not toxic to normal thymocytes . In addition, IVM also had a cytotoxic effect on a variety of nasopharyngeal cancer cells in vitro, and the mechanism is related to the reduction of PAK1 kinase activity to inhibit the MAPK pathway.
Lung cancer has the highest morbidity and mortality among cancers . Nishio found that IVM could significantly inhibit the proliferation of H1299 lung cancer cells by inhibiting YAP1 activity . Nappi’s experiment also proved that IVM combined with erlotinib to achieved a synergistic killing effect by regulating EGFR activity and in HCC827 lung cancer cells . In addition, IVM could reduce the metastasis of lung cancer cells by inhibiting EMT.
Melanoma is the most common malignant skin tumor with a high mortality rate. Drugs targeting BRAF mutations such as vemurafenib, dabrafenib and PD-1 monoclonal antibodies, including pembrolizumab and nivolumab have greatly improved the prognosis of melanoma [71,72]. Gallardo treated melanoma cells with IVM and found that it could effectively inhibit melanoma activity . Interestingly, IVM could also show activity against BRAF wild-type melanoma cells, and its combination with dapafinib could significantly increase antitumor activity. Additionally, it has been confirmed that PAK1 is the key target of IVM that mediates its anti-melanoma activity, and IVM can also significantly reduce the lung metastasis of melanoma in animal experiments. Deng found that IVM could activate the nuclear translocation of TFE3 and induce autophagy-dependent cell death by dephosphorylation of TFE3 (Ser321) in SK-MEL-28 melanoma cells . However, NAC reversed the effect of IVM, which indicated that IVM increased TFE3-dependent autophagy through the ROS signaling pathway.
3. IVM-induced programmed cell death in tumor cells and related mechanisms
IVM induces different programmed cell death patterns in different tumor cells (Table 1). As shown in Table 1, the main form of IVM induced programmed cell death is apoptosis. Apoptosis is a programmed cell death that is regulated by genes to maintain cell stability. It can be triggered by two activation pathways: the endogenous endoplasmic reticulum stress/mitochondrial pathway and the exogenous death receptor pathway [75,76]. The decrease in the mitochondrial membrane potential and the cytochrome c is released from mitochondria into the cytoplasm was detected after the intervention of IVM in Hela cells .Therefore, we infer that IVM induces apoptosis mainly through the mitochondrial pathway. In addition, morphological changed caused by apoptosis, including chromatin condensation, nuclear fragmentation, DNA fragmentation and apoptotic body formation were observed. Finally, IVM changed the balance between apoptosis-related proteins by upregulating the protein Bax and downregulating anti-apoptotic protein Bcl-2, thereby activating caspase-9/-3 to induce apoptosis [48,53,63] (Fig. 2 ).
Mechanisms of IVM-induced mitochondria-mediated apoptosis.
Autophagy is a lysosomal-dependent form of programmed cell death. It utilizes lysosomes to eliminate superfluous or damaged organelles in the cytoplasm to maintain homeostasis. It is characterized by double-layered or multilayered vacuolar structures containing cytoplasmic components, which are known as autophagosomes . In recent years, many studies have shown that autophagy is a double-edged sword in tumor development. On the one hand, autophagy can help tumors adapt to the nutritional deficiency of the tumor microenvironment, and to a certain extent, protect tumor cells from chemotherapy- or radiotherapy- induced injury. On the other hand, some autophagy activators can increase the sensitivity of tumors to radiotherapy and chemotherapy by inducing autophagy, and excessive activation of autophagy can also lead to tumor cell death [, , , ]. Overall, the specific environment of tumor cells will determine whether autophagy enhances or inhibits tumor development and improving autophagy activity has also become a new approach in cancer therapy. Programmed cell death mediated by autophagy after IVM intervention and the enhancement of the anticancer efficacy of IVM by regulating autophagy are interesting topics. Intervention with IVM in the breast cancer cell lines MCF-7 and MDA-MB-231 significantly increased intracellular autophagic flux and the expression of key autophagy proteins such as LC3, Bclin1, Atg5, and the formation of autophagosomes can be observed . However, after using the autophagy inhibitors chloroquine and wortmannin or knocking down Bclin1 and Atg5 by siRNA to inhibit autophagy, the anticancer activity of IVM significantly decreased. This proves that IVM mainly exerts an antitumor effect through the autophagy pathway. In addition, researchers also used the Akt activator CA-Akt to prove that IVM mainly induces autophagy by inhibiting the phosphorylation of Akt and mTOR (Fig. 3). The phenomenon of IVM-induced autophagy has also been reported in glioma and melanoma [ 64,74]. All of the above findings indicate the potential of IVM as an autophagy activator to induce autophagy-dependent death in tumor cells.
Mechanisms of IVM-induced PAK1/Akt/mTOR-mediated autophagy.
3.3. Cross talk between IVM-induced apoptosis and autophagy
The relationship between apoptosis and autophagy is very complicated, and the cross talk between the two plays a vital role in the development of cancer . Obviously, the existing results suggest that IVM-induced apoptosis and autophagy also exhibit cross talk. For example, it was found in SK-MEL-28 melanoma cells that IVM can promote apoptosis as well as autophagy . After using the autophagy inhibitor bafilomycin A1 or siRNA to downregulate Beclin1, IVM-induced apoptosis was significantly enhanced, which suggested that enhanced autophagy will reduce IVM-induced apoptosis and that IVM-induced autophagy can protect tumor cells from apoptosis. However, in breast cancer cell experiments, it was also found that IVM could induce autophagy, and enhanced autophagy could increase the anticancer activity of IVM . The latest research shows that in normal circumstances autophagy will prevent the induction of apoptosis and apoptosis-related caspase enzyme activation will inhibit autophagy. However, in special circumstances, autophagy may also help to induce apoptosis or necrosis . In short, the relationship between IVM-induced apoptosis and autophagy involves a complex regulatory mechanism, and the specific molecular mechanism needs further study. We believe that deeper exploration of the mechanism can further guide the use of IVM in the treatment of cancer.
Pyroptosis is a type of inflammatory cell death induced by inflammasomes. The inflammasome is a multimolecular complex containing pattern recognition receptor (PRR), apoptosis-associated speck-like protein containing a CARD (ASC), and pro-caspase-1. PRR can identify pathogen-associated molecular patterns (PAMPs) that are structurally stable and evolutionarily conserved on the surface of pathogenic microorganisms and damage-associated molecular patterns (DAMPs) produced by damaged cells [84,85]. Inflammasomes initiate the conversion of pro-caspase-1 via self-shearing into activated caspase-1. Activated caspase-1 can cause pro-IL-1β and pro-IL-18 to mature and to be secreted. Gasdermin D(GSDMD)is a substrate for activated caspase-1 and is considered to be a key protein in the execution of pyroptosis [86,87]. In an experiment by Draganov, it was found that the release of lactate dehydrogenase (LDH) and activated caspase-1 was significantly increased in breast cancer cells after IVM intervention . In addition, characteristic pyroptosis phenomena such as cell swelling and rupturing were observed. The authors speculated that IVM may mediate the occurrence of pyroptosis via the P2 × 4/P2 × 7/NLRP3 pathway (Fig. 4), but there is no specific evidence to prove this speculation. Interestingly, in ischemia-reperfusion experiments, IVM aggravated renal ischemia via the P2 × 7/NLRP3 pathway and increased the release of proinflammatory cytokines in human proximal tubular cells . Although there is currently little evidences showing that IVM induces pyroptosis, it is important to investigate the role of IVM in inducing pyroptosis in other cancers in future studies and realize that IVM may induce different types of programmed cell death in different types of cancer.
Mechanisms of IVM-induced P2 × 4/P2 × 7/NLRP3-mediated pyroptosis.
4. Anticancer effect of IVM through other pathways
4.1. Cancer stem cells
Cancer stem cells (CSCs) are a cell population similar to stem cells with characteristics of self-renewal and differentiation potential in tumor tissue [89,90]. Although CSCs are similar to stem cells in terms of function, because of the lack of a negative feedback regulation mechanism for stem cell self-renewal, their powerful proliferation and multidirectional differentiation abilities are unrestricted, which allows CSCs to maintain certain activities during chemotherapy and radiotherapy [, , ]. When the external environment is suitable, CSCs will rapidly proliferate to reactivate the formation and growth of tumors. Therefore, CSCs have been widely recognized as the main cause of recurrence after treatment [93,94]. Guadalupe evaluated the effect of IVM on CSCs in the breast cancer cell line MDA-MB-231 . The experimental results showed that IVM would preferentially targeted and inhibited CSCs-rich cell populations compared with other cell populations in MDA-MB-231 cells. Moreover, the expression of the homeobox protein NANOG, octamer-binding protein 4 (OCT-4) and SRY-box 2 (SOX-2), which are closely related to the self-renewal and differentiation ability of stem cells in CSCs, were also significantly inhibited by IVM. This suggests that IVM may be used as a potential CSCs inhibitor for cancer therapy. Further studies showed that IVM could inhibit CSCs by regulating the PAK1-STAT3 axis .
4.2. Reversal of tumor multidrug resistance
MDR of tumor cells is the main cause of relapses and deaths after chemotherapy . ATP binding transport family-mediated drug efflux and overexpression of P-glycoprotein (P-gp) are widely considered to be the main causes of tumor MDR [, , ]. Several studies have confirmed that IVM could reverse drug resistance by inhibiting P-gp and MDR-associated proteins [, , ]. In Didier’s experiments testing the effect of IVM on lymphocytic leukemia, IVM could be used as an inhibitor of P-gp to affect MDR . In Jiang’s experiment, IVM reversed the drug resistance of the vincristine-resistant colorectal cancer cell line HCT-8, doxorubicin-resistant breast cancer cell line MCF-7 and the chronic myelogenous leukemia cell line K562 . IVM inhibited the activation of EGFR and the downstream ERK/Akt/NF-kappa B signaling pathway to downregulate the expression of P-gp. Earlier, we mentioned the role of IVM in docetaxel-resistant prostate cancer  and gemcitabine-resistant cholangiocarcinoma . These results indicated the significance of applying IVM for the treatment of chemotherapy patients with MDR.
4.3. Enhanced targeted therapy and combined treatment
Targeted treatment of key mutated genes in cancer, such as EGFR in lung cancer and HER2 in breast cancer, can achieve powerful clinical effects [105,106]. HSP27 is a molecular chaperone protein that is highly expressed in many cancers and associated with drug resistance and poor prognosis. It is considered as a new target for cancer therapy . Recent studies have found that IVM could be used as an inhibitor of HSP27 phosphorylation to enhance the activity of anti-EGFR drugs in EGFR/HER2- driven tumors. An experiment found that IVM could significantly enhance the inhibitory effects of erlotinib and cetuximab on lung cancer and colorectal cancer . Earlier, we mentioned that IVM combined with conventional chemotherapeutic drugs such as cisplatin , paclitaxel , daunorubicin and cytarabine , or with targeted drugs such as dasatinib  and dapafenib  shows great potential for cancer treatment. The combination of drugs can effectively increase efficacy, reduce toxicity or delay drug resistance. Therefore, combination therapy is the most common method of chemotherapy. IVM has a variety of different mechanisms of action in different cancers, and its potential for synergistic effects and enhanced efficacy in combination therapy was of particular interest to us. Not only does IVM not overlap with other therapies in term of its mechanism of action, but the fact that of IVM has multiple targets suggests that it is not easy to produce IVM resistance. Therefore, continued study and testing of safe and effective combination drug therapies is essential to maximize the anticancer effects of IVM.
5. Molecular targets and signaling pathways involved in the anticancer potential of IVM
As mentioned above, the anticancer mechanism of IVM involves a wide range of signaling pathways such as Wnt/β-catenin, Akt/mTOR, MAPK and other possible targets such as PAK1 and HSP27, as well as other mechanisms of action (Table 2 ). We found that IVM inhibits tumor cell development in a PAK1-dependent manner in most cancers. Consequently, we have concentrated on discussing the role of PAK1 kinase and cross-talk between various pathways and PAK1 to provide new perspectives on the mechanism of IVM function.
As a member of the PAK family of serine/threonine kinases, PAK1 has a multitude of biological functions such as regulating cell proliferation and apoptosis, cell movement, cytoskeletal dynamics and transformation . Previous studies have indicated that PAK1 is located at the intersection of multiple signaling pathways related to tumorigenesis and is a key regulator of cancer signaling networks (Fig. 5). The excessive activation of PAK1 is involved in the formation, development, and invasion of various cancers [ 109,110]. Targeting PAK1 is a novel and promising method for cancer treatment, and the development of PAK1 inhibitors has attracted widespread attention . IVM is a PAK1 inhibitor in a variety of tumors, and it has good safety compared to that of other PAK1 inhibitors such as IPA-3. In melanoma and nasopharyngeal carcinoma, IVM inhibited cell proliferation activity by inhibiting PAK1 to downregulate the expression of MEK 1/2 and ERK1/2 [69,73]. After IVM intervention in breast cancer, the expression of PAK1 was also significantly inhibited, and the use of siRNA to downregulate the expression of PAK1 in tumor cells significantly reduced the anticancer activity of IVM. Interestingly, IVM could inhibit the expression of PAK1 protein but did not affect the expression of PAK1 mRNA .The proteasome inhibitor MG132 reversed the suppressive effect of IVM, which indicated that IVM mainly degraded PAK1 via the proteasome ubiquitination pathway. We have already mentioned that IVM plays an anticancer role in various tumors by regulating pathways closely related to cancer development. PAK1 is at the junction of these pathways. Overall, we speculate that IVM can regulate the Akt/mTOR, MAPK and other pathways that are essential for tumor cell proliferation by inhibiting PAK1 expression, which plays an anticancer role in most cancers.
Malignant tumors are one of the most serious diseases that threaten human health and social development today, and chemotherapy is one of the most important methods for the treatment of malignant tumors. In recent years, many new chemotherapeutic drugs have entered the clinic, but tumor cells are prone to drug resistance and obvious adverse reactions to these drugs. Therefore, the development of new drugs that can overcome resistance, improve anticancer activity, and reduce side effects is an urgent problem to be solved in chemotherapy. Drug repositioning is a shortcut to accelerate the development of anticancer drugs.
As mentioned above, the broad-spectrum antiparasitic drug IVM, which is widely used in the field of parasitic control, has many advantages that suggest that it is worth developing as a potential new anticancer drug. IVM selectively inhibits the proliferation of tumors at a dose that is not toxic to normal cells and can reverse the MDR of tumors. Importantly, IVM is an established drug used for the treatment of parasitic diseases such as river blindness and elephantiasis. It has been widely used in humans for many years, and its various pharmacological properties, including long- and short-term toxicological effects and drug metabolism characteristics are very clear. In healthy volunteers, the dose was increased to 2 mg/Kg, and no serious adverse reactions were found, while tests in animals such as mice, rats, and rabbits found that the median lethal dose (LD50) of IVM was 10-50 mg/Kg  In addition, IVM has also been proven to show good permeability in tumor tissues . Unfortunately, there have been no reports of clinical trials of IVM as an anticancer drug. There are still some problems that need to be studied and resolved before IVM is used in the clinic.
(1) Although a large number of research results indicate that IVM affects multiple signaling pathways in tumor cells and inhibits proliferation, IVM may cause antitumor activity in tumor cells through specific targets. However, to date, no exact target for IVM action has been found. (2) IVM regulates the tumor microenvironment, inhibits the activity of tumor stem cells and reduces tumor angiogenesis and tumor metastasis. However, there is no systematic and clear conclusion regarding the related molecular mechanism. Therefore, in future research, it is necessary to continue to explore the specific mechanism of IVM involved in regulating the tumor microenvironment, angiogenesis and EMT. (3) It has become increasingly clear that IVM can induce a mixed cell death mode involving apoptosis, autophagy and pyroptosis depending on the cell conditions and cancer type. Identifying the predominant or most important contributor to cell death in each cancer type and environment will be crucial in determining the effectiveness of IVM-based treatments. (4) IVM can enhance the sensitivity of chemotherapeutic drugs and reduce the production of resistance. Therefore, IVM should be used in combination with other drugs to achieve the best effect, while the specific medication plan used to combine IVM with other drugs remains to be explored.
Most of the anticancer research performed on the avermectin family has been focused on avermectin and IVM until now. Avermectin family drugs such as selamectin [36,41,113], and doramectin  also have anticancer effects, as previously reported. With the development of derivatives of the avermectin family that are more efficient and less toxic, relevant research on the anticancer mechanism of the derivatives still has great value. Existing research is sufficient to demonstrate the great potential of IVM and its prospects as a novel promising anticancer drug after additional research. We believe that IVM can be further developed and introduced clinically as part of new cancer treatments in the near future.
Declaration of Competing Interest
The authors report no declarations of interest.
This work was supported by the Science Research Innovation Team Project of Anhui Colleges and Universities (2016-40), the Bengbu City Natural Science Foundation (2019-12), the Key Projects of Science Research of Bengbu Medical College (BYKY2019009ZD) and National University Students’ Innovation and Entrepreneurship Training Program (201910367001).
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A 33-fold spike has been witnessed in the occurrence of a blood clot in the lung, which can be fatal, in 30 days after getting infected with coronavirus, found a new study.
Another five-fold rise in the risk of getting deep vein thrombosis (DVT) has been linked with contracting Covid, it also said.
The findings of the research were published in the British Medical Journal on Thursday.
The study was carried out by Anne-Marie Fors Connolly of Umeå University in Sweden and her colleagues. The team looked to check the risk of DVT, pulmonary embolism, which is a blood clot in the lung, and other types of bleeding in over one million people, who were also the confirmed cases of Covid.
They also found a two-fold hike in the risk of bleeding after 30 days of the infection.
After becoming infected with coronavirus, patients remain at heightened risk of pulmonary embolism for six months. For bleeding and DVT, the risk is for two and three months, respectively.
“Pulmonary embolism can be fatal, so it is important to be aware [of this risk]. If you suddenly find yourself short of breath, and it doesn’t pass, [and] you’ve been infected with the coronavirus, then it might be an idea to seek help, because we find this increased risk for up to six months,” Connolly told the Guardian.