Navigation Links
Gene discovery could lead to male contraceptive
Date:4/2/2009

A newly discovered genetic abnormality that appears to prevent some men from conceiving children could be the key for developing a male contraceptive, according to University of Iowa researchers reporting their findings in the April 2 online edition of the American Journal of Human Genetics.

Although female oral contraceptives were developed over 40 years ago and have proven very effective for family planning, no similar pharmacological contraceptive has been developed for males. Surveys conducted by the Medical Research Council Reproductive Biology Unit in the United Kingdom, suggest that men would be willing to use a pharmacological contraceptive if one was available. Presently the only contraceptives available for men are condoms or a vasectomy.

"We have identified CATSPER1 as a gene that is involved in non-syndromic male infertility in humans, a finding which could lead to future infertility therapies that replace the gene or the protein. But, perhaps even more importantly, this finding could have implications for male contraception," said Michael Hildebrand, Ph.D., co-lead author of the study and a UI postdoctoral researcher in otolaryngology at the UI Roy J. and Lucille A. Carver College of Medicine.

The research team, which included scientists from the University of Social Welfare and Rehabilitation Sciences in Tehran, Iran, discovered the male infertility gene while studying the genetics of families from Iran -- a population that has relatively high rates of disease-causing gene mutations.

Although the team's research with these Iranian families focuses on identifying genetic causes of deafness, collecting genetic information from this population allowed the researchers to identify two families where male infertility that was not part of a syndrome appeared to be inherited. The affected men's infertility was diagnosed with a routine semen analysis.

Focusing on a group of genes that have been implicated in male infertility in mice, the researchers found that mutations in both Iranian families occurred in a single gene called CATSPER1. DNA analysis revealed two different mutations -- one in each family -- but both mutations would likely lead to either a very truncated, non-functional version of the protein, or no protein at all. Neither mutation was found in the DNA of 576 Iranian individuals who were screened as controls.

Harvard University studies on mouse models that lack the CATSPER1 gene reveal how sperm is affected when the protein is missing or abnormal. These studies show that CATSPER1 mutations affect sperm motility, specifically the very vigorous hyperactive motion the sperm uses when it is entering the egg during fertilization.

"Our research suggests that the defect in sperm hyperactivity that is seen in mice without CATSPER1 will also occur in humans with the genetic mutation," Hildebrand said. "Identification of targets such as the CATSPER1 gene that are involved in the fertility process and are specific for sperm -- potentially minimizing side effects of a drug targeting the protein's function -- provide new targets for a pharmacological male contraceptive."

Several approaches to male contraception are currently under investigation at other institutions. One approach that could potentially target CATSPER1 is immunocontraception where antibodies are developed that bind to a targeted protein and block its function. Immunocontraception is still in early stages of development and in order to be useful it will need to be proven effective, safe and reversible.


'/>"/>

Contact: Jennifer Brown
jennifer-l-brown@uiowa.edu
319-335-9917
University of Iowa
Source:Eurekalert  

Related biology news :

1. Bioscience institutions come together to launch Microlife Discovery Center for area students
2. Teeth of Columbus crew flesh out tale of new world discovery
3. Elephant shark genome sequence leads to discovery of color perception in deep-sea fish
4. Cellular discovery may lead to targeted treatment for rare form of anemia
5. New discovery paves the way for new diagnosis of serious lung disease
6. La Jolla Institute signs exclusive license agreement with Medimmune on major asthma discovery
7. Rett Syndrome Research Trust advisor makes significant discovery
8. Singapore research organisations team up to advance drug discovery using brain tumor stem cells
9. Breaking the barrier: Discovery of anti-resistance factors and novel ocean drugs
10. Major step for drug discovery and diagnostics
11. Cell-building discovery could reduce need for some animal research
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Gene discovery could lead to male contraceptive
(Date:6/16/2016)... SAN FRANCISCO , June 16, 2016 /PRNewswire/ ... Market size is expected to reach USD ... report by Grand View Research, Inc. Technological proliferation ... and banking applications are expected to drive the ... ) , The development of ...
(Date:6/9/2016)... -- Perkotek an innovation leader in attendance control systems is proud to announce the introduction ... to make sure the right employees are actually signing in, and to even control ... ... ... ...
(Date:6/7/2016)...  Syngrafii Inc. and San Antonio Credit Union ... integrating Syngrafii,s patented LongPen™ eSignature "Wet" solution into ... result in greater convenience for SACU members and ... existing document workflow and compliance requirements. ... Highlights: ...
Breaking Biology News(10 mins):
(Date:6/27/2016)... ... June 27, 2016 , ... Newly created 4Sight Medical ... to the healthcare market. The company's primary focus is on new product introductions, ... strategies that are necessary to help companies efficiently bring their products to market. ...
(Date:6/27/2016)... , June 27, 2016   Ginkgo Bioworks , ... industrial engineering, was today awarded as one of ... of the world,s most innovative companies. Ginkgo Bioworks ... for the real world in the nutrition, health ... work directly with customers including Fortune 500 companies ...
(Date:6/24/2016)... ... June 24, 2016 , ... While the majority of commercial spectrophotometers and fluorometers ... the 6000i models are higher end machines that use the more unconventional z-dimension of ... beam from the bottom of the cuvette holder. , FireflySci has developed several ...
(Date:6/23/2016)... (PRWEB) , ... June 23, 2016 , ... ... is pleased to announce the launch of their brand, UP4™ Probiotics, into Target ... over 35 years, is proud to add Target to its list of well-respected ...
Breaking Biology Technology: