Navigation Links
Living with females extends the reproductive life of the male mouse, says Penn veterinary researcher
Date:1/22/2009

alysis indicated that abnormal spermatogenesis occurred sooner in isolated males, suggesting that defects in spermatogenesis may play a role in the greater decrease in fertility in isolated males.

"If it turns out that this reproductive effect is mimicked in other species, for example, livestock animals that affect food production, then a 20 percent increase in male fertility could mean an extension of the male reproductive life span of years," Brinster said. "This finding may also have relevance for the protection of some large endangered species."

This research continues 10 years of study on the relationship between the stem cell environment, called the "niche" and spermatogonial stem cells, or SSCs. Brinster's team first discovered that the niche in the testis of the newborn male mouse supports the stem cell and its differentiation to produce complete spermatogenesis better than the niche in the mature adult male testis. In subsequent studies, Brinster determined that when the SSCs of young males were transferred into new young testes every three months, the SSCs survived for more than three years, a greater than 50 percent increase in life of the stem cell. Therefore, in old males it was the SSC niche in the testis that was failing long before the SSC, which was relatively long-lived.

The female is just one of many environmental cues that may influence the niche and cells, and thereby fertility, of the male. Whether this female influence occurs in other species is not known, but it is known that the female profoundly modifies a variety of responses in males in many areas of male physiology and psychology.

The study was performed by Brinster of the Department of Animal Biology in the School of Veterinary Medicine at Penn, as well as Jonathan A. Schmidt and Jon M. Oatley, now of the Department of Dairy and Animal Science at Pennsylvania State University. The research was supported by the National Institutes of Health and the Robert J. Kle
'/>"/>

Contact: Jordan Reese
jreese@upenn.edu
215-573-6604
University of Pennsylvania
Source:Eurekalert

Page: 1 2 3

Related medicine news :

1. Waking Up And Getting Ready: New Green Guide Advocates Simple Living and Earth-Centered Spirituality
2. Slices of living brain tissue are helping scientists identify new stroke therapies
3. AT&T Mobility and Brookdale Senior Living Host First Cell Phones for Seniors Public Service Event in New York City
4. Senior Living Provider Invites Residents to Dream. Dare. Discover!
5. New Year starts with focus on healthy living
6. SantaFe Senior Living Announces Leadership Transition
7. Moshi Names Independent Living Aids Exclusive Distributor in Blindness and Visual Impairment Field
8. Finding Grace on a Less Traveled Road: A Cancer Doctor Reflects on Living and Dying
9. AdCare Health Systems, Inc. Acquires Remaining Ownership in Van Wert Assisted Living Property
10. Southern AIDS Living Quilt Raises Awareness in Washington, D.C.
11. In-House Hospice Offers Help to Those Living With Grief During Holiday Time
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/31/2015)... Tenn. (PRWEB) , ... July 31, 2015 , ... The ... Robert Church Park in Downtown Memphis on October 3, 2015. The Ride to Fight ... focused on cancer research between Methodist Healthcare, The West Clinic and The University of ...
(Date:7/31/2015)... ... July 31, 2015 , ... Facebook, Twitter, Linkedin and ... their social media profiles to better connect with the public. The agency website ... information, share insights and opinions. The Rally Insurance Group, Inc.’s pledge to provide ...
(Date:7/31/2015)... ... July 31, 2015 , ... According to the article published July 27 ... Pasadena courthouse was contained and extinguished by the city’s fire department before it caused major ... at the time of the fire, and it was a fire alarm system that tipped ...
(Date:7/31/2015)... ... July 31, 2015 , ... Cosmetic Town ... patients alike on various plastic surgery procedures including, but not limited to, abdominoplasty, ... dermatology procedures like Botox and fillers. , Staying up to date with ...
(Date:7/31/2015)... ... 2015 , ... Creating one of the most modern fertility centers in the ... that goes beyond the boundaries of fertility medicine. , As the leading gynecology ... dependable patient support, affordable treatments, unending hope, and high fertility success rates — all ...
Breaking Medicine News(10 mins):Health News:West Cancer Center Announces 2nd Annual Ride to Fight On 2Health News:West Cancer Center Announces 2nd Annual Ride to Fight On 3Health News:Rally Insurance Group, Inc. Connects to Customers Through Re-branded Social Media Profiles 2Health News:Article on Recent Pasadena Courtroom Fire Highlights the Effectiveness of Fire Alarm Systems, Says Fire Protection Group Inc 2Health News:Article on Recent Pasadena Courtroom Fire Highlights the Effectiveness of Fire Alarm Systems, Says Fire Protection Group Inc 3Health News:Cosmetic Town: Now Providing Interactive And Vital Medical Knowledge 2Health News:New Hope IVF Now Offers Most Affordable Assisted Reproductive Treatment in the UAE 2Health News:New Hope IVF Now Offers Most Affordable Assisted Reproductive Treatment in the UAE 3
... SWEDESBORO, N.J., Oct. 1 Wedgewood Pharmacy ... entered an agency agreement,through which Midwest will ... clinics in 27 states. The relationship is,effective ... that Midwest has represented a,compounding pharmacy service. ...
... Attorneys from McKissock & Hoffman, PHILADELPHIA, Oct. ... Cherin and Mellott, LLC today announced that it ... of 22 attorneys from,McKissock & Hoffman including name ... in the continued expansion of Eckert Seamans, Philadelphia,and ...
... a supplier,of affordable medical imaging systems to healthcare providers, ... president of Sales,and Business Development for the company. ... to the,next level," says Tom Hacking, chairman and chief ... forward to the many contributions he,will make." With ...
... Educational ... Resource at IDSA Annual Meeting, HADDON HEIGHTS, N.J., Oct. ... continuing education,resource as part of their exhibit booth at the ... October 4-7, in San Diego,California. Project CDAD: Outbreak Prevention and ...
... pinch in the arm can help save 36,000 lives ... the,beginning of flu season, which will put up to ... is easily prevented with an inexpensive,vaccination. AARP is urging ... begins its annual spread., (Logo: http://www.newscom.com/cgi-bin/prnh/20070209/NYF043LOGO ...
... 1 BD (Becton,Dickinson and Company) (NYSE: BDX ... of its fourth fiscal quarter 2007 earnings conference call ... will issue a press,release detailing the quarter,s earnings earlier ... will be accessible through BD,s,website at http://www.bd.com/investors ...
Cached Medicine News:Health News:Wedgewood Pharmacy and Midwest Veterinary Supply Sign New Agency Agreement 2Health News:Wedgewood Pharmacy and Midwest Veterinary Supply Sign New Agency Agreement 3Health News:Eckert Seamans Announces Major Expansion in Philadelphia, West Chester and Harrisburg 2Health News:Eckert Seamans Announces Major Expansion in Philadelphia, West Chester and Harrisburg 3Health News:National Experts Team Up to Help Hospitals Prevent and Control C. difficile Outbreaks 2Health News:AARP Reminds All People 50-Plus to Get a Flu Shot This Year 2
(Date:7/31/2015)... -- Semler Scientific, Inc. (Nasdaq: SMLR ), a company ... and physician groups, today reported financial results for the ... "In the second quarter of 2015, Semler reported continued ... quarter over quarter revenue growth of 8%, and quarter ... units of 18%," said Doug Murphy-Chutorian, M.D., chief executive ...
(Date:7/30/2015)... -- Edwards Lifesciences Corporation (NYSE: EW ), the global ... today announced that Robert A. Ingram has retired ... an ardent champion for innovation in the lifesciences industry, and ... Edwards, board as we pursue our focused innovation strategy," said ... has provided a valuable perspective to our board, drawing on ...
(Date:7/30/2015)... , July 30, 2015  Tandem Diabetes ... device company and manufacturer of the t:slim® and ... entered into non-exclusive Development Agreements with Dexcom, Inc. ... insulin pumps with the Dexcom G5 and G6 ... Tandem,s next generation pump platform with Dexcom,s future ...
Breaking Medicine Technology:Semler Reports Second Quarter 2015 Financial Results 2Semler Reports Second Quarter 2015 Financial Results 3Semler Reports Second Quarter 2015 Financial Results 4Semler Reports Second Quarter 2015 Financial Results 5Semler Reports Second Quarter 2015 Financial Results 6Tandem Diabetes Care Announces Development Agreement with Dexcom for Integration of Future Generation CGM Systems 2Tandem Diabetes Care Announces Development Agreement with Dexcom for Integration of Future Generation CGM Systems 3
... 2011 Leading events organiser UBM Live , a ... the fifth annual PharmaSource Conference to be held from 21st ... Munich City. Organised by CPhI Conferences, the flagship PharmaSource event ... the sourcing and procurement sectors by uncovering key market developments, ...
... Pa., Dec. 6, 2011   Discovery Laboratories, Inc. (Nasdaq: ... use of AFECTAIR® resulted in as much as a 70 ... deliver the desired dose of the therapeutic gas when compared ... 0.001).  Nitric oxide is a costly medical gas frequently used ...
Cached Medicine Technology:CPhI Conferences Announces Details of 5th Annual PharmaSource Conference in Munich 2CPhI Conferences Announces Details of 5th Annual PharmaSource Conference in Munich 3New Study Shows AFECTAIR® Significantly Improved Delivery of Nitric Oxide Under Simulated Neonatal Ventilatory Conditions 2New Study Shows AFECTAIR® Significantly Improved Delivery of Nitric Oxide Under Simulated Neonatal Ventilatory Conditions 3New Study Shows AFECTAIR® Significantly Improved Delivery of Nitric Oxide Under Simulated Neonatal Ventilatory Conditions 4
The Optima III 45 cm line of laparoscopic hand instruments is ideal for operative laparoscopic/endoscopic procedures or when a longer instrument is needed....
The Snap-In Snap-Out-II Tip Inserts offer a large variety of configurations....
The Snap-In Snap-Out-II Tip Inserts offer a large variety of configurations....
The Snap-In Snap-Out-II Tip Inserts offer a large variety of configurations....
Medicine Products: