WASHINGTON, KOMPAS.com - Scientists have finally managed to unravel the mechanisms that control the movement of sperm cells from reaching the eggs for membuahinya. The discovery that a new chapter in research on fertility as well as opening the way for treatment and the creation of male contraception.
As reported in the February issue of the journal Cell, Dr. Yuriy Kirichok and colleagues from the University of California at San Francisco managed to observe the behavior of sperm. Sperm were not directly bererang shortly after ejaculation. However, when they enter the female reproductive tract, they started swimming and picking up speed as he approached the egg cell.
Sperm cells apparently have limitations. To be the champion, they have to wait for the right moment. The winner does not immediately move, but they waited a moment before then swam sporadically reaching the eggs.
According to researchers, the movement of sperm is also affected by the level of acidity (pH) of their internal. A small pores on the surface of sperm cells will determine the pH change that later became pelecut motion on the tail of sperm.
From previous research it has been revealed that the level of sperm activity is largely determined by internal pH. However, scientists had not yet found a mechanism that can regulate the level of acid or basanya sperm.
In his research, Dr. Yuriy Kirichok found that to increase the pH becomes more alkaline (base), sperm cells must dispose of the molecule protons. To achieve this, it can be done through the pores on the surface of sperm cells.
"The concentration of protons in the sperm 1,000 times higher than outside it. Only by opening a pore, protons will be out-we also have identified molecules that make them out," he said.
Kirichok added, the pores of proficiency level, or researchers with a term called HV1 proton channel, it seems dikonsidikan in the open position. Pores that can respond to a similar substance called anandamide, which is found in the female reproductive organs and substances that high levels around the egg.
Is the endocannabinoid anandamide, a natural substance that can affect neurons. According to researchers, substances found in marijuana cannabinoids also have a similar effect so that it can explain why the use of marijuana causes infertility in men.
"Marijuana seems to make sperm become activated prematurely, so they burned in a matter of hours," said Dr. Kirichok.
kompas.com
Monday 30 January 2012
Subscribe to:
Post Comments (Atom)
0 comments:
Post a Comment