HOME >> BIOLOGY >> NEWS
Research reveals a cellular basis for a male biological clock

Researchers at the University of Washington have discovered a cellular basis for what many have long suspected: Men, as well as women, have a reproductive clock that ticks down with age.

A recent study revealed that sperm in men older than 35 showed more DNA damage than that of men in the younger age group. In addition, the older men's bodies appeared less efficient at eliminating the damaged cells, which could pass along problems to offspring.

"When you talk about having children, there has been a lot of focus on maternal age," said Narendra Singh, research assistant professor in the UW Department of Bioengineering and lead researcher on the study. "I think our study shows that paternal age is also relevant."

Charles Muller, with the UW Department of Urology and a collaborator on the study, recently presented the findings at the annual meeting of the American Society for Reproductive Medicine in Seattle.

In the study, researchers recruited 60 men, age 22 to 60, from laboratory and clinical groups. A computerized semen analysis was performed for each of the subjects, looking for breaks in sperm cell DNA and evidence of apoptosis, or cell suicide. Normally, when something goes irreparably wrong in a cell, that cell is programmed to kill itself as a means of protecting the body.

The researchers found that men over age 35 had sperm with lower motility and more highly damaged DNA in the form of DNA double-strand breaks. The older group also had fewer apoptotic cells an important discovery, Singh said.

"A really key factor that differentiates sperm from other cells in the body is that they do not repair their DNA damage," he said. "Most other cells do."

As a result, the only way to avoid passing sperm DNA damage to a child is for the damaged cells to undergo apoptosis, a process that the study indicates declines with age.

"So in older men, the sperm are accumulating more damage, and those severely damaged sperm are
'"/>

Contact: Rob Harrill
rharrill@u.washington.edu
206-543-2580
University of Washington
25-Nov-2002


Page: 1 2

Related biology news :

1. Researchers determine genetic cause of Timothy syndrome
2. Researchers find color sensitive atomic switch in bacteria
3. Schepens Eye Research Institute receives Roadmap grant to develop center for curing eye diseases
4. Researchers identify protein promoting vascular tumor growth
5. Researchers devise potent new tools to curb ivory poaching
6. Researchers create nanotubes that change colors, form nanocarpet and kill bacteria
7. Researchers ID chlorophyll-regulating gene
8. Environmental issues center of Inland Northwest Research Alliance 4th Annual Symposium
9. Research suggests new avenue for stopping, preventing colon cancer
10. Researchers develop fast track way to discover how cells are regulated
11. Research on carbohydrate metabolism receives historical recognition

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Research reveals cellular basis for male biological clock

(Date:4/27/2015)... , Apr. 27, 2015 NXT-ID, Inc. (NASDAQ: ... authentication company focused on the growing mobile commerce market, ... to pre-order customers the first week of May, 2015 ... month of May. Gino Pereira ... milestone for the company as Wocket® enters the consumer ...
(Date:4/20/2015)... 2015 The announcement comes as ... Records Management (GRM), Ireland,s foremost records ... Having built up an impressive track record of clients within ... within the records management sector in Dubai ... GCC staffbase and employ a further eight staff members at ...
(Date:4/13/2015)... YORK , April 13, 2015 ... by TechSci Research, "Global Biometrics Market Forecast & Opportunities, ... register a CAGR of around 14% till 2020. ... governments for large scale implementation and review of ... and launch of new products with greater efficiency, ...
Breaking Biology News(10 mins):Wocket, the Smartest Wallet You Will Ever Own, Announces Shipment to Pre-order Customers 2Wocket, the Smartest Wallet You Will Ever Own, Announces Shipment to Pre-order Customers 3Glenbeigh Records Management Wins Contract With Dubai Islamic Bank 2Glenbeigh Records Management Wins Contract With Dubai Islamic Bank 3Global Biometrics Market to Cross US$ 21 Billion by 2020: TechSci Research 2
(Date:5/28/2015)... , May 28, 2015 ... announced the addition of Jain PharmaBiotech,s new ... and Companies"  to their offering.  ... remains a challenge in management. With nearly ... the seven major markets of the world ...
(Date:5/28/2015)... 2015 Research ... the addition of Jain PharmaBiotech,s new ... and Companies"  to their offering.  ,     ... and evaluates animal biotechnology and its ... as well as improvement in food ...
(Date:5/28/2015)... 27, 2015 Research and Markets( http://www.researchandmarkets.com/research/6cg3zw/cell_therapy ... new report "Cell Therapy - Technologies, Markets ... This report describes and evaluates cell therapy technologies ... an important role in the practice of medicine. ... fashioned bone marrow transplants. Role of cells in ...
(Date:5/28/2015)... LAWRENCEVILLE, N.J. , May 28, 2015 ... announced that it has received commitments from two institutional ... million of the Company,s common stock in an at-the-market ... warrants to purchase common stock. The Company ... pursuant to which the Company agreed to sell an ...
Breaking Biology Technology:Global Alzheimer Disease Report 2015-2024 - New Drugs, Markets and Companies 2Global Alzheimer Disease Report 2015-2024 - New Drugs, Markets and Companies 3Global Animal Biotechnology Report 2015 - Technologies, Markets and Companies Analysis to 2024 2Global Animal Biotechnology Report 2015 - Technologies, Markets and Companies Analysis to 2024 3Global Cell Therapy Market 2015-2020 - Technologies, Markets and Companies 2Celsion Corporation Announces $8 Million At-The-Market Registered Direct Offering 2Celsion Corporation Announces $8 Million At-The-Market Registered Direct Offering 3
Cached News: