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Showing posts with label medical science. Show all posts
Showing posts with label medical science. Show all posts

Saturday, July 4, 2020

Nail to the coffin of prof Campbell's theory of cancer supposedly triggered by protein

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A long-time vegan diet promoter Prof-emeritus T.C Campbell of Cornell University, author of The China Study book, used to claim in his studies that adding protein to high carbohydrate mice diet does trigger the cancer while removing it reduces the frequency and size of cancerous tumors. Campbell argues that casein, a protein found in milk from mammals, is "the most significant carcinogen we consume" (see Wiki T. Colin Campbell and Talk by T. Colin Campbell Archived 2011-04-17 at the Wayback Machine, Google Videos, 20:24 mins, accessed December 3, 2010.).

Campbell's theory has been questioned for some time. Most notably, Denise Minger has posted some very in-depth and thorough analyses on-line discussing what exactly may have gone wrong with Campbell's research.

This study found that the reality is in fact quite the opposite to the scientist's claim, showing that a high protein low carbohydrate diet had in fact almost completely protected the genetically-modified cancer-susceptible mice against getting cancer (while the high-carbohydrate control group got 50% cancer!)

"A Low Carbohydrate, High Protein Diet Slows Tumor Growth and Prevents Cancer Initiation", by
Victor W. Ho, Kelvin Leung, Anderson Hsu, Beryl Luk, June Lai, Sung Yuan Shen, Andrew I. Minchinton, Dawn Waterhouse, Marcel B. Bally, Wendy Lin, Brad H. Nelson, Laura M. Sly and Gerald Krystal, Published in Cancer Research/AACR, July 2011



Quote

Abstract

Since cancer cells depend on glucose more than normal cells, we compared the effects of low carbohydrate (CHO) diets to a Western diet on the growth rate of tumors in mice. To avoid caloric restriction–induced effects, we designed the low CHO diets isocaloric with the Western diet by increasing protein rather than fat levels because of the reported tumor-promoting effects of high fat and the immune-stimulating effects of high protein. We found that both murine and human carcinomas grew slower in mice on diets containing low amylose CHO and high protein compared with a Western diet characterized by relatively high CHO and low protein. There was no weight difference between the tumor-bearing mice on the low CHO or Western diets.

Additionally, the low CHO-fed mice exhibited lower blood glucose, insulin, and lactate levels. Additive antitumor effects with the low CHO diets were observed with the mTOR inhibitor CCI-779 and especially with the COX-2 inhibitor Celebrex, a potent anti-inflammatory drug. Strikingly, in a genetically engineered mouse model of HER-2/neu–induced mammary cancer, tumor penetrance in mice on a Western diet was nearly 50% by the age of 1 year whereas no tumors were detected in mice on the low CHO diet. This difference was associated with weight gains in mice on the Western diet not observed in mice on the low CHO diet. Moreover, whereas only 1 mouse on the Western diet achieved a normal life span, due to cancer-associated deaths, more than 50% of the mice on the low CHO diet reached or exceeded the normal life span. Taken together, our findings offer a compelling preclinical illustration of the ability of a low CHO diet in not only restricting weight gain but also cancer development and progression. Cancer Res; 71(13); 4484–93. ©2011 AACR.

What was also interesting that an addition of an anti-inflammatory COX-2 inhibitor drug (Celebrex, 1g/kg body) slowed down the tumor growth by about a half, regardless of a diet! Not sure how to interpret it, perhaps that inflammation accelerates the tumor growth in general?

Wednesday, November 28, 2018

Mitochondrial DNA inherited from both parents!

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Paper: "Biparental Inheritance of Mitochondrial DNA in Humans", by
Shiyu Luo, et al., PNAS, November 26, 2018


Quote:

The energy-producing organelle mitochondrion contains its own compact genome, which is separate from the nuclear genome. In nearly all mammals, this mitochondrial genome is inherited exclusively from the mother, and transmission of paternal mitochondria or mitochondrial DNA (mtDNA) has not been convincingly demonstrated in humans. In this paper, we have uncovered multiple instances of biparental inheritance of mtDNA spanning three unrelated multiple generation families, a result confirmed by independent sequencing across multiple unrelated laboratories with different methodologies. Surprisingly, this pattern of inheritance appears to be determined in an autosomal dominantlike manner. This paper profoundly alters a widespread belief about mitochondrial inheritance and potentially opens a novel field in mitochondrial medicine.

Thursday, July 26, 2018

Lancet - A lot of what is published is incorrect

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Offline: What is medicine's 5 sigma? by Richard Horton, Published in "The Lancet" 11 April 2015

Quote

The case against science is straightforward: much of the scientific literature, perhaps half, may simply be untrue. Afflicted by studies with small sample sizes, tiny effects, invalid exploratory analyses, and flagrant conflicts of interest, together with an obsession for pursuing fashionable trends of dubious importance, science has taken a turn towards darkness. As one participant put it, “poor methods get results”. The Academy of Medical Sciences, Medical Research Council, and Biotechnology and Biological Sciences Research Council have now put their reputational weight behind an investigation into these questionable research practices. The apparent endemicity of bad research behaviour is alarming. In their quest for telling a compelling story, scientists too often sculpt data to fit their preferred theory of the world. Or they retrofit hypotheses to fit their data. Journal editors deserve their fair share of criticism too. We aid and abet the worst behaviours. Our acquiescence to the impact factor fuels an unhealthy competition to win a place in a select few journals. Our love of “significance” pollutes the literature with many a statistical fairy-tale. We reject important confirmations. Journals are not the only miscreants. Universities are in a perpetual struggle for money and talent, endpoints that foster reductive metrics, such as high-impact publication. National assessment procedures, such as the Research Excellence Framework, incentivise bad practices. And individual scientists, including their most senior leaders, do little to alter a research culture that occasionally veers close to misconduct.



Friday, July 20, 2018

Carbohydrates are killing us

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"Carbohydrates are killing us"
By Eric Thorn - (cardiologist affiliated with the Virginia Hospital Center)- Sunday, July 8, 2018

Quote:

Consider a report published last year in The Lancet that studied nutrition among more than 135,000 people across 18 different countries — making it the largest-ever observational study of its kind. The researchers found that people who ate the least saturated fat — about the same amount currently recommended for heart patients — had the highest rates of heart disease and mortality. Meanwhile, people who consumed the most saturated fat had the lowest rate of strokes.


Identify what is bad for you ... (Wiki Bacon)


Reference study:

Associations of fats and carbohydrate intake with cardiovascular disease and mortality in 18 countries from five continents (PURE): a prospective cohort study


Monday, June 18, 2018

Recovered raw data of old study undermines 40y of dietary dogma

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SciAm article: Records Found in Dusty Basement Undermine Decades of Dietary Advice
Raw data from a 40-year-old study raises new questions about fats
By Sharon Begley, STAT on April 19, 2017


Quote:

Ramsden, of the National Institutes of Health, unearthed raw data from a 40-year-old study, which challenges the dogma that eating vegetable fats instead of animal fats is good for the heart. The study, the largest gold-standard experiment testing that idea, found the opposite, Ramsden and his colleagues reported on Tuesday in BMJ (formerly the British Medical Journal).

Although the study is more than just another entry in the long-running nutrition wars—it is more rigorous than the vast majority of research on the topic—Ramsden makes no claims that it settles the question. Instead, he said, his discovery and analysis of long-lost data underline how the failure to publish the results of clinical trials can undermine truth.
...
The coleader of the project was Dr. Ancel Keys, author of the Seven Countries Study, Time cover subject, and the most prominent advocate of replacing saturated fat with vegetable fat. “The idea that there might be something adverse about lowering cholesterol [via vegetable oils] was really antithetical to the dogma of the day,” Bob Frantz said.

His father, he said, “was always committed to discovering the truth. He would be pleased this is finally coming out.”


From The Telegraph "Modern dunce's cap"



I beg to differ. I doubt if Dr. Ivan Frantz would be proud of publishing the truth, because he could have but he didn't! I think he was afraid of the truth! Like many academics, intellectuals and most people I knew worked with.   Not only Dr. I. Frantz kept the study's most important data unpublished but also actively obfuscated it by publishing a misleading partial summaries and whitewashed watered-down inconclusive "conclusions".

Half-truth = full lie!


Because of Dr. Ivan Frantz' and other fake scientists' failure to publish the truth, What followed was 40-more years of suffering by millions of people from preventable diseases, due to bad dietary advise and corporate self-served food marketing that was based on the academically-supported half-truth, lies and distortions!

United Stated needs no external enemy - it is being destroyed by their own luminaries and the establishment through half-truth, lies and deception.

Bob Frantz, Dr. Franz's son, who rediscovered the hidden records and got them published, can't really feel proud of his father, but he definitely deserves to be proud of himself and be praised for bringing the truth! He is also lucky to have survived his father's bad diet at home, as a child.

Reference:
Appendix: Supplementary material [posted as supplied by author
Part 1: MCE supporting materials and historical context
Tribute to Dr. Ivan Frantz in leading the Minnesota Coronary Experiment team
Reared on Margarine and to the Tune of Spinning Ultracentrifuges:
A Son’s Recollections of Ivan D. Frantz, Jr. During the Early Days of Lipid Research
Robert P. Frantz, M.D.

Saturday, April 18, 2015

Alzheimer's and lack of arginine

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Arginine is especially abundant in common food such as dairy products, meat, nuts and chickpeas!

(from Dairy Council of California)
Recent study described here:

Alzheimer's breakthrough: Scientists may have found potential cause of the disease in the behaviour of immune cells..


Quote:

They observed that in Alzheimer’s, immune cells that normally protect the brain instead begin to consume a vital nutrient called arginine.

My comment:

Probably because arginine is an essential nutrient for all cells including immune cells. If there is not enough, immune cells will sequester what is available.

Arginine is an amino acid and an essential nutrient for several bodily processes, including cell division, healing and immune responses.

It is found in food, including dairy products, meat, nuts and chickpeas, but the team at Duke said that their study did not suggest eating more arginine would have an impact on Alzheimer’s risk. The blood-brain barrier regulates how much arginine can enter the brain, and the immune response that breaks down arginine would remain the same even if confronted with higher levels of the nutrient.
Really?  Dr. Pickett must be a very wise man knowing that upfront and thus excluding that therapeutic option by his statement, without doing any testing!

“The study suggests that low levels of arginine in the brain could contribute to the death of nerve cells in Alzheimer’s, but there is much more we still need to understand about how and why nerve cells die in the disease,” she added.

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Tuesday, January 27, 2015

Salt intake not correlated with mortality

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New study and one more medical myth demolished:

Dietary Sodium Content, Mortality, and Risk for Cardiovascular Events in Older Adults

Wiki


Quote:
Results  The mean (SD) age of participants was 73.6 (2.9) years, 51.2% were female, 61.7% were of white race, and 38.3% were black. After 10 years, 881 participants had died, 572 had developed CVD, and 398 had developed HF. In adjusted Cox proportional hazards regression models, sodium intake was not associated with mortality (hazard ratio [HR] per 1 g, 1.03; 95% CI, 0.98-1.09; P = .27). 

Saturday, January 22, 2011

46% sugar diet causes breast cancer...

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Underfunded Scientists Force Lipstick-Covered Rat With Cancer To Run Through Maze

... in mice, as medical "scientists" have recently discovered in this study.   Strangely, that is not what they officially concluded, that's why I put the word in quotes!   The lethal mice diet consisted of 46% of sugar (31% sucrose + 10% maltodextrin + 5% dextrin), 21% of milk fat and 19% of casein.   Read more about that in this post by Denise Minger.

Heretic
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"... a flea without legs cannot jump when told, because it cannot hear - concluded the leading biologist Professor Lysenko"  (old Soviet joke) 

"You need a computer to obfuscate things properly but to really foul things up you need a scientist!" (anonymous, 1960-ties)