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Latest Germ cells Stories

2010-10-26 00:01:43

Researchers have now found a way to propagate primary human Sertoli cells in the laboratory -- the first step, say investigators, to developing an artificial human testicle for reproductive research. Derived from the testis, it has been difficult to maintain Sertoli cells, the "nurse" cells responsible for overseeing sperm production, outside of the human body. San Francisco, CA (Vocus) October 25, 2010 After more than 30 years of unsuccessful efforts by numerous investigators,...

2010-10-25 16:13:00

Fertility procedures such as in vitro fertilization (IVF) require a couple and the doctor to place the risky bet that the multiple eggs they choose to fertilize will produce an embryo that will thrive in the uterus. Researchers cannot biopsy eggs directly because that would destroy them, but a new discovery by professors at Brown University and Women & Infants Hospital could lead to new insights about how eggs develop and ultimately inform judgments about how the embryos they produce will...

2010-10-22 01:38:48

Researchers at the Swedish medical university Karolinska Institutet have been able to describe the 3D structure of a complete egg receptor that binds sperm at the beginning of fertilization. The results, published in the journal Cell, will lead to better understanding of infertility and may enable entirely new types of contraceptives. For centuries, the imagination of people has been grasped by the encounter of gametes "“ egg and sperm-, whose union gives rise to a new individual. At...

2010-10-14 14:51:45

In worms as in women, fertility declines at a rate that far exceeds the onset of other aging signs. And now a new report in the October 15th issue of Cell, a Cell Press publication, suggests that worms' and humans' biological clocks may wind down over time for similar underlying reasons. "For us, what's most important is that there are so many shared genes involved," said Coleen Murphy of Princeton University. "This isn't just about worms and how they reproduce." That such commonalities would...

2010-09-08 14:10:55

Two new studies have shed more light on how smoking may damage fertility, and give further weight to advice that mothers and fathers-to-be should stop smoking before attempting to conceive. The research is published online in Europe's leading reproductive medicine journal Human Reproduction today (Wednesday 8 September). In the first study [1], researchers found that a mother's smoking during early pregnancy dramatically reduces the numbers of germ cells (the cells that form eggs in females...

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2010-07-16 10:55:15

What do a trout, sea anemone, rooster, fly and man have in common? Just as styles in sexy clothes or fashion change from year to year and culture to culture, "sexy" genes, or genes specific to sex, also change rapidly. But there is one sex-specific gene so vital, its function has remained unaltered throughout evolution and is found in almost all animals, according to new research from Northwestern University Feinberg School of Medicine. The gene, called Boule, is responsible for sperm...

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2010-07-12 08:05:00

Dr Andrew Johnson is speaking today (July 12) at the UK National Stem Cell Network annual conference. He and his team from the University of Nottingham have been using a Mexican aquatic salamander called an axolotl to study the evolution and genetics of stem cells - research that supports the development of regenerative medicine to treat the consequences of disease and injury using stem cell therapies. This team has found that there are extraordinary similarities in the development of...

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2010-06-24 06:35:00

A woman's body could be instinctively selective about sperm, allowing some sperm to make it to the egg while killing off the chances of less suitable contenders, an Australian researcher said Wednesday. Professor Sarah Robertson, of the University of Adelaide, suggested that sperm contains "signaling molecules" that activate immunity changes in a woman's body so the sperm is accepted. However, some apparently healthy sperm have failed to activate these changes, leading Prof. Robertson to...

2010-06-02 13:46:50

Since the beginning, plants and animals have deployed various mechanisms to fight pathogens. Proteins have always played an important part in this armoury, and a broad variety of defensin proteins have become part of the immune system of plants, insects and other animals except mammals. Now scientists from Regensburg discovered that those proteins also play a role in the "sex life" during the fertilization process of plants. These findings will be published next week in the online, open...

2010-04-27 08:29:07

Two independent groups of researchers have identified distinct roles for two proteins in a family of proteins known as PLA2s as crucial for sperm function and fertility in mice. These data identify proteins that could underlie causes of infertility and provide potential targets for the development of new contraceptive agents and new approaches to treating infertility. In addition, these data provide a caution to those developing drugs that target members of this closely related group of...


Word of the Day
holluschickie
  • A 'bachelor seal'; a young male seal which is prevented from mating by its herd's older males (mated bulls defending their territory).
This comes from the Russian word for 'bachelors.'
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