2
votes

Sperm's Genes Contribute to Shorter Life

Dec 03, 2009
Women may live longer than men because they do not have sperm, scientists say.

The recent study conducted by the Japanese scientists revealed that the gene in sperm contributes to shorter lifespan in males. Tomohiro Kono and Manabu Kawahara, the leading researchers of the study created the so-called 13 "bi-maternal" mice with genetic material from two mothers without a father. Scientists altered genes in a mouse eggs so that it could fertilise another egg, which resulted in an embryo with only maternal genes.

The results of the study showed that "bi-maternal" mice lived 186 days longer on average than mice with normal genetic material. The longest living "bi-maternal" mouse lived for 1,045 days if compared to 996 days for mouse with common mixture of genes from mother and father. Also the study found that mice born from two mothers had other advantages like stronger immune system. They were also lighter and smaller on average than normal mice.

Scientists say that a gene Rasgrf1 imprinted on chromosome 9, linked to post-natal growth is responsible for shorter life in men. The gene is inherited from father and is repressed in females, which explains why "bi-maternal" mice lived longer.

The study has been published in European journal Human Reproduction..


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Oct 27, 2015 03:53 PM » posted by: Arturo
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Oct 27, 2015 03:53 PM » posted by: Arturo
Are such things as:<a href="http://vhdsgls.com"> resaon</a>, common sense, ethics, integrity and shame, DEAD?It is unfortunate that corruption pervades many aspect of human interactions even in the practice of medicine. Drugs are being approved and used even if they show only a marginal improvement over the placebo or other established treatments and carry more risk, just because some one will profit big time. Where is the professional ethics, integrity and common sense? Not only does one have to deal with bias and discrimination but one can not trust even well established and supposedly reputable establishments. Breast cancer treatment results were reported in NEJM a prestigious medical publication in the late ‘80s and more recently research at Boston University has been found to be fraudulent. How is one to make a decision as to what to believe? When I tried to report (early ‘80s) how I treated two cases of ectopic pregnancies vaginally with the help of a laparoscope, all three Ob/Gyn publications refused to publish, apparently because it was not a timely topic, yet a decade or so later you read all sorts of acrobatics, including useful surgical procedures performed via laparoscope. Another thing when the report of a successful prevention of premature birth is reported these findings are relegated to and buried in less read publications. Why? On one hand fraudulent info is published in prestigious publications because this generated mega bucks, while a genuine info is denied of public exposure and thus babies’ lives are lost needlessly. The retraction of fraudulent information may prevent further harm but do little to repair the damages done.

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Oct 26, 2015 09:59 AM » posted by: Dipak
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