Navigation Links
New Compound May Improve Fertility in Smokers

A reproductive medicine specialist at the University at Buffalo has shown that a new compound may improve the fertility of tobacco smokers// who have low sperm count and low percentage sperm motility.

The sperm from male smokers were washed with a synthetic chemical called AM-1346. After incubation, there was a doubling in the fertilizing capacity of sperm from poor quality semen, results showed.

Lani Burkman, Ph.D., and colleagues presented the findings at the 2006 meeting of the American Society of Reproductive Medicine held recently in New Orleans.

"Based on our previous data and published literature, it is clear that most tobacco smokers will exhibit a small or a significant decline in fertility," she stated. "Nicotine addiction is quite powerful. The best solution is to stop smoking and then wean yourself off of all nicotine products. But for smokers who can't quit, the in vitro use of AM-1346 may significantly improve their fertilizing capacity."

Burkman, associate professor in the departments of gynecology/obstetrics and urology and head of the Section on Andrology in the UB School of Medicine and Biomedical Sciences, previously demonstrated that sperm functions critical for fertilization are altered by nicotine exposure, whether in vitro, or through long-term tobacco use. Two-thirds of the male smokers studied had decreased fertility; some showed a serious loss.

The new study involved nine selected smokers (22 experiments) who had been evaluated previously for sperm fertilizing potential using the outside cover of a human egg, called the zona pellucida. Four men had a high number of sperm attaching to the zona (normal, Group I), while five other smokers had sperm with poor egg binding (poor fertilizing potential, Group II).

The new experiments were designed to evaluate whether sperm with poor fertilizing capacity from smokers could be treated so that egg binding was improved. Specifical ly, the researchers studied a potential interaction between two chemical systems that control sperm.

"Human sperm carry the cholinergic receptor, which responds to the neurotransmitter acetylcholine," noted Burkman. "Nicotine mimics acetylcholine and binds to the cholinergic receptor." In earlier research, Burkman and colleagues also showed that human sperm contain cannabinoid receptors, which respond to marijuana, as well as natural cannabinoids occurring in the body.

"Research from other scientists indicates that the cholinergic system and the cannabinoid system naturally regulate human sperm and help prepare them for fertilizing an egg," she said. "Our research suggests that this natural regulation is out of balance for the majority of smokers when sperm are continuously exposed to nicotine.

"We think there is an important communication between the cannabinoid and cholinergic receptor systems in human sperm," said Burkman. "No one has shown this interaction before when looking at human tissue. AM-1346, the drug that we tested, is a synthetic version of a natural cannabinoid found in the body.

"In 22 Hemizona tests, we showed that the response to AM-1346 depended on the initial fertility of the tobacco smoker, and if his semen showed poor quality, meaning low sperm count and low percentage motility."

The sperm from Group II volunteers were incubated with AM-1346 for several hours and then retested in the Hemizona Assay. Six experiments in Group II started with semen of low quality and all six resulted in stimulation of sperm binding to the zona ranging from 133 percent to 330 percent, with a mean of 201 percent, when compared to their own untreated sperm, results showed.

"In contrast," said Burkman, "samples from Group I (normal fertility, normal semen quality) reacted in the opposite manner. This two-way, or biphasic, response is common for cannabinoid action. With Group I, the drug AM-1346 caused a substantial decrease in sperm binding to the zona for eight out of nine samples.

"This opposite response must be studied further," Burkman said. "It might be tied to early-versus-late steps in fertilization, where it is expected that one process is slowed down while another process is stimulated.

"It does appear that sperm functioning in tobacco smokers with low fertility and low semen quality is quite different when compared to smokers with higher fertility and good semen quality. Nicotine appears to change the sperm membranes and sperm receptors. It also raises the question of why sperm from some smokers are protected from the effects of tobacco and nicotine."

Source-Eurekalert
'"/>




Related medicine news :

1. Compound of Broccoli combats breast cancer
2. New Compound Could Strengthen The Effect Of Chemotherapy
3. Breathing Cancer Causing Compounds During Pregnancy Found To Affect Offspring
4. Compound from cottonseed for neck and head cancers
5. Compounds Found In The Vegetable Broccoli Could Have Anti-Cancer Properties
6. Adding Sorghum Compounds To Dietary Supplements May Help Lower Cholesterol
7. Compound In Grapes And Red Wine To Counter Alzheimers Disease
8. Sugars Could Contain Key Cancer Inhibiting Compounds
9. Compound From Cyanobacterium Can Fight Alzheimer’
10. Five New Anti-Inflammatory Compounds Produced By Indian Scientists
11. Compounds in Licorice Can Fight Tooth Decay
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:5/3/2016)... ... May 03, 2016 , ... Dave Newberry, broker/owner of Newberry ... Center (PICC) annual fundraiser luncheon on Friday, May 20. “We have raised over ... victims of drug abuse,” said Newberry. , PICC is a local Kent, WA, clinic ...
(Date:5/2/2016)... CO (PRWEB) , ... May 02, 2016 , ... It ... serve as the keynote speaker for five events throughout the month of May. , ... a number of national news outlets. He also frequently appears on the Science Channel’s ...
(Date:5/2/2016)... ... 02, 2016 , ... As directed by its board of directors during its ... support to allow certified nurse practitioners (CNP) to practice to the full scope of ... supervision for three years and 3,600 hours. , In addition, HAP supports CNPs who ...
(Date:5/2/2016)... ... ... Eating Recovery Center’s Insight Behavioral Health Center (ERC Insight) , a ... eating disorder program under a new name: Eating Recovery Center, Chicago (ERC Chicago). ERC ... , To celebrate, ERC Chicago will host a ribbon-cutting ceremony and open house on ...
(Date:5/2/2016)... ... 2016 , ... The National Resident Matching Program® (NRMP®) has ... Match”), the system through which U.S. and international medical school students and graduates ... placed in the 2016 Match, and 29,572 were filled when the matching algorithm ...
Breaking Medicine News(10 mins):
(Date:4/29/2016)... India , April 29, 2016 ... Pipeline Review, H1 2016" market research report that ... complete with comparative analysis at various stages, therapeutics ... route of administration (RoA) and molecule type, along ... releases. It also reviews key players involved in ...
(Date:4/29/2016)... April 29, 2016 Glycotope GmbH, ... today announces the appointment of Dr. Alfredo Zurlo ... is an oncologist with many years clinical experience and ... industries. His last role was at Mologen AG where ... Executive Board. Previously Dr. Zurlo held various positions at ...
(Date:4/28/2016)... , April 28, 2016  While Abbott,s ... complement the company,s valve repair and stent business, ... also places Abbott more firmly into patient monitoring.  ... the fastest growing device areas, with double-digit growth ... recent report,  Advanced Remote Patient Monitoring ...
Breaking Medicine Technology: