Tag: Cancer

Genetically engineered virus kills cancer

by The Age of Blasphemy, posted in Genetically engineered virus kills cancer, JX-594, Pexa-Vec

Genetically engineered virus kills cancer

Sixteen patients given a high dose of the therapy survived for 14.1 months on average, compared to 6.7 months for the 14 who got the low dose.

“For the first time in medical history we have shown that a genetically engineered virus can improve survival of cancer patients,” study co-author David Kirn told AFP.

The four-week trial with the vaccine Pexa-Vec or JX-594, reported in the journal Nature Medicine, may hold promise for the treatment of advanced solid tumours.

“Despite advances in cancer treatment over the past 30 years with chemotherapy and biologics, the majority of solid tumours remain incurable once they are metastatic (have spread to other organs),” the authors wrote.

There was a need for the development of “more potent active immunotherapies”, they noted.

Pexa-Vec “is designed to multiply in and subsequently destroy cancer cells, while at the same time making the patients’ own immune defence system attack cancer cells also”, said Kirn from California-based biotherapy company Jennerex.

“The results demonstrated that Pexa-Vec treatment at both doses resulted in a reduction of tumour size and decreased blood flow to tumours,” said a Jennerex statement.

“The data further demonstrates that Pexa-Vec treatment induced an immune response against the tumour.”

Pexa-Vec has been engineered from the vaccinia virus, which has been used as a vaccine for decades, including in the eradication of smallpox.

The trial showed Pexa-Vec to be well tolerated both at high and low doses, with flu-like symptoms lasting a day or two in all patients and severe nausea and vomiting in one.

The authors said a larger trial has to confirm the results. A follow-up phase with about 120 patients is already under way.

Pexa-Vec is also being tested in other types of cancer tumours.

A patient undergoes a scanner as radiology technicians look at the exam on a screen, on February 6, 2013, at a medical unit specialised in cancer treatment in France. A genetically-engineered virus tested in 30 terminally-ill liver cancer patients significantly prolonged their lives, killing tumours and inhibiting the growth of new ones, scientists reported on Sunday.

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Antioxidants May Actually Be Causing Cancer

by The Age of Blasphemy, posted in Antioxidants, Cancer

James Watson Says Antioxidants May Actually Be Causing Cancer
Annalee Newitz

James Watson Says Antioxidants May Actually Be Causing Cancer

Celebrated geneticist James Watson, one of several researchers who won the Nobel Prize for discovering the structure of DNA, has just published what can only be called a cancer manifesto in Open Biology. It’s full of fairly harsh criticisms for current cancer researchers, but also suggests several ways forward in the “war on cancer.” Among other claims, Watson asserts that antioxidants like vitamin C — often recommended as cancer-prevention supplements — could be causing some forms of cancer. He also has harsh words for personalized medicine, and the laziness of cancer researchers.

Watson, now in his 80s, has spent a great deal of his life raising money to fund cancer research at Cold Spring Harbor Laboratory, where he’s served as director since the late 1960s. Clearly anticipating his own mortality, he mourns the lack of good leadership in cancer research:

That we now have no General of influence, much less power, say an Eisenhower or even better a Patton, leading our country’s War on Cancer says everything. Needed soon is a leader that has our cancer drug development world working every day and all through the night.

He suggests that the problem is researchers are slacking, only putting in “never frantic, largely five-day working week[s].”

He goes on to say that the current craze for “personalized medicine” that will treat cancer is just not going to work. But the main problem comes from government money being misspent:

The now much-touted genome-based personal cancer therapies may turn out to be much less important tools for future medicine than the newspapers of today lead us to hope. Sending more government cancer monies towards innovative, anti-metastatic drug development to appropriate high-quality academic institutions would better use National Cancer Institute’s (NCI) monies than the large sums spent now testing drugs for which we have little hope of true breakthroughs. The biggest obstacle today to moving forward effectively towards a true war against cancer may, in fact, come from the inherently conservative nature of today’s cancer research establishments.

He goes on to say that conventional thinking about cancer is all wrong. Antioxidants may be undermining cancer therapies and even causing cancer:

In light of the recent data strongly hinting that much of late-stage cancer’s untreatability may arise from its possession of too many antioxidants, the time has come to seriously ask whether antioxidant use much more likely causes than prevents cancer.

All in all, the by now vast number of nutritional intervention trials using the antioxidants β-carotene, vitamin A, vitamin C, vitamin E and selenium have shown no obvious effectiveness in preventing gastrointestinal cancer nor in lengthening mortality. In fact, they seem to slightly shorten the lives of those who take them. Future data may, in fact, show that antioxidant use, particularly that of vitamin E, leads to a small number of cancers that would not have come into existence but for antioxidant supplementation. Blueberries best be eaten because they taste good, not because their consumption will lead to less cancer.

It is thought that antioxidants can prevent damage to DNA from oxygen radicals. But, argues Watson, we want oxygen radicals in cancer cells because this can cause the cells to die. Taking antioxidants might be preventing cancer drugs from destroying cancer cells. Instead, he recommends patients combine anti-antioxidants with cancer drugs.

Watson also recommends an area of research, into a class of proteins called RNAi, which can be used to shut down the activity of genes. He claims that we need less than a billion dollars to win the war on cancer if we focus on RNAi research:

The total sum of money required for RNAi methodologies to reveal the remaining major molecular targets for future anti-cancer drug development need not be more than 500–1000 million dollars. Unfortunately, the NCI now is unlikely to take on still one more big science project when it is so hard-pressed to fund currently funded cancer programmes … Further financial backing, allowing many more cancer-focused academic institutions to also go big using RNAi-based target discovery as well as to let them go on to the early stages of subsequent drug discovery, is not beyond the might of the world’s major government research funding bodies nor that of our world’s many, many super billionaires. The main factor holding us back from overcoming most of metastatic cancer over the next decade may soon no longer be lack of knowledge but our world’s increasing failure to intelligently direct its ‘monetary might’ towards more human-society-benefiting directions.

Watson also wants researchers to focus on a protein called Myc, which is believed to regulate the activity of 15% of our genes. Its activity is also linked to many kinds of cancer. Using RNAi methods, it’s possible we could figure out a way to control Myc, and thus shut down pathways to cancer.

Further Reading:

Watson’s manifesto, “Oxidants, antioxidants, and the current incurability of metastatic cancers,” in Open Biology

Reuters’ Sharon Begley has a good report on what other cancer researchers think about Watson’s comments.

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SCIENCE NEWS

by The Age of Blasphemy, posted in Science News

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by The Age of Blasphemy, posted in Latest Science, Science, Science News

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Sex With Animals Linked to Penile Cancer

by The Age of Blasphemy, posted in Sex With Animals, Zoophilia

By Maureen O’Connor

Sex with Animals Causes Penis Cancer

Sex with Animals Causes Penis Cancer

Men who put their penises in animals have a higher likelihood of penis cancer, a new study in the Journal of Sexual Medicine reports:

We think that the intense and long-term SWA [sex with animals] practice could produce micro-traumas in the human penile tissue. The genital mucus membranes of animals could have different characteristics from human genitalia, and the animals’ secretions are probably different from human fluids. Perhaps animal tissues are less soft than ours, and non-human secretions would be toxic for us.

Is there a take-away lesson from this story? The Huffington Post offers:

A member of a pro-zoophilia group told The Huffington Post by email that the results of the study should prompt people to take precautions, like using a condom, when having sex with animals.

A bold and stirring call to action. If you like this story, the Huffington Post also recommends “16 WAYS to Drive Your Goat Lover WILD,” “PHOTO: Marmaduke Nip Slip” “GALLERY: Sexy Sheep of the Meadow.” [HuffPost, image via Shutterstock.com]

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In Ancient Greece, the animals fuck you.

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