Posts Tagged ‘stem cells’

High doses of antioxidant supplements induce stem cell genetic abnormalities

This is interesting, and important if you’re taking lots of supplements thinking that the more antioxidants you take, the longer you’ll live. Research is providing plenty of evidence that it doesn’t work so simply, while supplements fail to act according to the logical prevailing theory. Here’s another piece. – Ilene  

High doses of antioxidant supplements induce stem cell genetic abnormalities

Spoonful of dietary supplements

Courtesy of David Granovsky, in SCIENCE & STEM CELLS 

High doses of antioxidant supplements induce stem cell genetic abnormalities

High doses of antioxidant nutritional supplements, such as vitamins C and E, can increase genetic abnormalities in cells, which may predispose supplement-takers to developing cancer, according to a new study from the Cedars-Sinai Heart Institute.

The study, led by Eduardo Marbán, M.D., Ph.D., director of the Cedars-Sinai Heart Institute, was published online today in the medical journal Stem Cells. The study also will appear in the journal’s July printed edition.

Marbán and his team accidentally discovered the danger of excessive antioxidant doses while seeking a way to reduce the genetic abnormalities that occurred naturally when the scientists sought to multiply human cardiac stem cells.

Marbán stressed that the study’s finding applies only to excessive  and not to foods that are rich in antioxidants, such as milk, oranges, blueberries and peanuts. In recent years, multiple studies have touted the benefits of foods rich in antioxidants.

“Taking one multivitamin daily is fine, but a lot of people take way too much because they think if a little is good, a lot must be better,” said Marbán, who is also the Mark Siegel Family Professor at Cedars-Sinai. “That is just not the case. If you are taking 10 or 100 times the amount in a daily multivitamin, you may be predisposing your cells to developing cancer, therefore doing yourself more harm than good.”

In laboratories, stem cells are often grown in a Petri dish culture than is composed of 20 percent oxygen, whereas cells growing inside human tissue are exposed to just 3 to 5 percent oxygen. But Marbán’s team of researchers became frustrated because the higher concentration of oxygen in lab-grown stem cells resulted in 9 percent of the cells being rejected because of genetic abnormalities.

“We sought to counter that oxidation problem by adding high doses of antioxidants directly to
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A Stem-Cell Discovery Could Help Diabetics

A Stem-Cell Discovery Could Help Diabetics

By Alice Park, courtesy of TIME

Human-induced pluripotent stem cells
Human-induced pluripotent stem cells appear
Shinya Yamanaka / AP

Researchers are inching ever closer to bringing the latest stem-cell technologies from bench to bedside — and are, in the process, learning more about some diseases that long have remained medical black boxes.

This week, scientists at the Harvard Stem Cell Institute (HSCI) reported the first success in generating new populations of insulin-producing cells using skin cells of Type 1 diabetes patients. The achievement involved the newer embryo-free technique for generating stem cells, and marked the first step toward building a treatment that could one day replace a patient’s faulty insulin-making cells with healthy, functioning ones.

The experiment, published in the Proceedings of the National Academy of Sciences, also provided the first good model — in a petri dish — of how Type 1 diabetes develops, giving scientists a peek at what goes wrong in patients affected by the disease. Such knowledge could lead to not only new stem-cell-based treatments, but also novel drug therapies that might improve the symptoms of the disease.

Douglas Melton, co-director of HSCI, and his team took skin cells from two Type 1 diabetes patients, exposed the cells to a cocktail of three genes that converted them back to an embryonic state — which are referred to as pluripotent stem cells — then instructed the newly reborn cells to grow into beta cells, the cells in the pancreas that secrete insulin. In Type 1 diabetes, these beta cells no longer work to break down the glucose that floods the body after each meal, leading to blood-sugar spikes that can damage the kidneys and heart.

To test whether their lab-made cells could function like normal beta cells, Melton’s group exposed them to glucose in a dish. When sugar levels were high, the cells produced more of a protein that beta cells release when they break down sugar; when glucose levels were low, the protein levels were low as well.

"These cells represent the newest model of diabetes for humans," says Melton. "We have a lot of good models of Type 1 diabetes in the mouse, but everything that we have learned from them has failed in the clinic. Now we have a chance at figuring out how humans get the disease."…
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ValueWalk

Crescat Capital: The Reckoning Is Upon Us

By Jacob Wolinsky. Originally published at ValueWalk.

Decades of fiscal profligacy are culminating in an explosion of government debt that is poised to bring simmering monetary debasement to a boiling point. Central bank interventions have aided and abetted reckless government spending that has obfuscated poor underlying organic growth fundamentals. Instead of laying zero groundwork for future real economic growth, monetary authorities have fostered a euphoric investment environment with delusional asset valuations. Paradoxically, we are past the point of no return where the stimulative policies that have created this frenzy are the death knell for the economy. The world is suffering from a debt overdose. It now must face the inevitability of collapsing financial asset pri...



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Phil's Favorites

Benchmark Capital's Chetan Puttagunta Joins Me On Panic With Friends - As Software Eats The World - How Hungry Is Open Source?

 

Benchmark Capital’s Chetan Puttagunta Joins Me On Panic With Friends – As Software Eats The World – How Hungry Is Open Source?

Courtesy of Howard Lindzon

I am fascinated by the software sector and lately the open source category of software.

I started down this rabbit hole back in January 2019 and covered it here.

Wired magazine just put out this ‘opinion’ piece titled ‘...



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Kimble Charting Solutions

Key Inflation Indicators Facing Big Test In September!

Courtesy of Chris Kimble

Inflation has long been a word that the Federal Reserve uses but the general markets have forgotten about.

Why? Well because it’s been virtually non-existent for years. Key indicators like commodities (i.e. copper) have been in a down-trends and the Materials Sector (XLB) has lagged… until this year.

In today’s chart 3-pack, we take a look at the Equal Weight Commodity Index, ...



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Zero Hedge

Sweden Dominates Drug-Deaths In Europe

Courtesy of ZeroHedge View original post here.

As highlighted by the latest edition of the European Drug Report, Sweden is the country with the most drug-induced deaths per million of the population in Europe.

In 2018, 81 people died per million inhabitants, ahead of the United Kingdom's 76 drug-induced deaths per million. Finland and Ireland jointly had the third-highest death rate with 72 deaths per million.

You will find more infographics ...



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Politics

'Colossal Backdoor Bailout': Outrage as Pentagon Funnels Hundreds of Millions Meant for Covid Supplies to Private Defense Contractors

 

'Colossal Backdoor Bailout': Outrage as Pentagon Funnels Hundreds of Millions Meant for Covid Supplies to Private Defense Contractors

"If you can't get a Covid test or find an N95, it’s because these contractors stole from the American people to make faster jets and fancy uniforms."

By Jake Johnson

Secretary of Defense Mark Esper and Chairman of the Joint Chiefs of Staff Army Gen. Mark Milley hold an end of year press conference at the Pentagon on December 20, 2019 in Arlington, Virginia. (Photo: Drew Angerer/Getty Images)

Instead of adhering to congressional inten...



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Biotech/COVID-19

How and when will we know that a COVID-19 vaccine is safe and effective?

 

How and when will we know that a COVID-19 vaccine is safe and effective?

How much longer must society wait for a vaccine? ANDRZEJ WOJCICKI/Getty Images

By William Petri, University of Virginia

With COVID-19 vaccines currently in the final phase of study, you’ve probably been wondering how the FDA will decide if a vaccine is safe and effective.

Based on the status of the Phase 3 trials currently underway, it i...



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Chart School

Stocks are not done yet - Update

Courtesy of Read the Ticker

There are a few times in history when a third party said this US paper (stocks, funds or bonds) is worthless.

Here is two.

1) 1965 Nixon Shock - The French said to US we do not want your paper dollars please pay us in gold. This of course led to the US going off the gold standard.

2) 2007 Bear Stern Fund Collapse - Investors said their funds collateral was worth much less than stated. This of course was the beginning of the great america housing bust of 2008.


In both cases it was stated .."look the Emperor is naked!"... (The Empe...

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Digital Currencies

Cryptocurrencies Rarely Used To Launder Money, Fiat Preferred

Courtesy of ZeroHedge View original post here.

Authored by Shaurya Malwa via Decrypt.io,

Traditional channels continue to dominate the estimated $2 trillion global money laundering racket instead of cryptocurrencies, a report says.

In brief
  • Money laundering via cryptocurrencies is not a preferred tool for criminals, a report said...



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The Technical Traders

Adaptive Fibonacci Price Modeling System Suggests Market Peak May Be Near

Courtesy of Technical Traders

Our Adaptive Fibonacci Price Modeling system is suggesting a moderate price peak may be already setting up in the NASDAQ while the Dow Jones, S&P500, and Transportation Index continue to rally beyond the projected Fibonacci Price Expansion Levels.  This indicates that capital may be shifting away from the already lofty Technology sector and into Basic Materials, Financials, Energy, Consumer Staples, Utilities, as well as other sectors.

This type of a structural market shift indicates a move away from speculation and towards Blue Chip returns. It suggests traders and investors are expecting the US consumer to come back strong (or at least hold up the market at...



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Lee's Free Thinking

Texas, Florida, Arizona, Georgia - The Branch COVIDIANS Are Still Burning Down the House

 

Texas, Florida, Arizona, Georgia – The Branch COVIDIANS Are Still Burning Down the House

Courtesy of Lee Adler, WallStreetExaminer 

The numbers of new cases in some of the hardest hit COVID19 states have started to plateau, or even decline, over the past few days. A few pundits have noted it and concluded that it was a hopeful sign. 

Is it real or is something else going on? Like a restriction in the numbers of tests, or simply the inability to test enough, or are some people simply giving up on getting tested? Because as we all know from our dear leader, the less testing, the less...



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Insider Scoop

Economic Data Scheduled For Friday

Courtesy of Benzinga

  • Data on nonfarm payrolls and unemployment rate for March will be released at 8:30 a.m. ET.
  • US Services Purchasing Managers' Index for March is scheduled for release at 9:45 a.m. ET.
  • The ISM's non-manufacturing index for March will be released at 10:00 a.m. ET.
  • The Baker Hughes North American rig count report for the latest week is scheduled for release at 1:00 p.m. ET.
...

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Promotions

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Mapping The Market

How IPOs Are Priced

Via Jean Luc 

Funny but probably true:

...

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Philip R. Davis is a founder Phil's Stock World, a stock and options trading site that teaches the art of options trading to newcomers and devises advanced strategies for expert traders...

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