Ovary in Biological News

Continuous oral contraceptives better at easing pain, bleeding

... a biological proof of concept that both the ovary and the lining of the uterus are suppressed ... syndrome, endometriosis and polycystic ovary syndrome. But there have been few detailed ... follicle size all biomarkers that indicate the ovary is less active and reported less pain and ...

Ovarian transplantation: First baby is born after a new technique

... graft encourages the growth of blood vessels and paves the way for the ovary to become fully functioning in a shorter time scale than would be possible ... tube had been destroyed by the ovarian retrieval, and the function of the ovary and hence the chances of pregnancy are limited in time. Hence we decided ...

Ovarian transplantation: New technique gives greatly improved results in this delicate operation

... They also followed up nine homozygotic twin patients after fresh ovary transplantation for the duration of ovarian function and pregnancy ... With the microvascular technique, the tiny blood vessels supplying the ovary are directly linked, and ischemia time, during which blood supply is ...

Mate choice in plants

... is recognized and rejected and compatible pollen allowed to proceed to the ovary are still unknown. Understanding the molecular mechanisms of pollen ... enzymes that degrade RNA. S-RNases are expressed in the stigma, style and ovary and concentrate in the style ECM where they interact with pollen tubes. ...

July 2008 highlights

... Prenatal programming. Polycystic ovary syndrome, or PCOS, is among the most common causes of infertility, ... Jacoris, and Alice F. Tarantal. Endocrine Antecedents of Polycystic ovary Syndrome in Fetal and Infant Prenatally Androgenized Female Rhesus ...

InVitria to Unveil Powerful Cell Culture Media Component ZAP-CHO

... Director of Cell Culture, Dr. Steve Pettit, will present the performance enhancing features of ZAP-CHO, a new media component for Chinese hamster ovary (CHO) cell culture, at 3:30 pm on Wednesday, May 20, 2009 as part of BioProcess International’s BioProcess Theatre, a venue employed to ...

A new way to assemble cells into 3-D microtissues

... for blood cells), which depend on the presence of the growth factor interleukin-3, by combining them in microtissues with CHO cells (Chinese hamster ovary cells) that were engineered to secrete interleukin-3. When the two cell types were randomly mixed, the stem cells didn't grow. But structured ...

Tailor-made recombinant proteins in mammals

... from E. coli , Bertozzi and her colleagues showed that it works equally well in the most common mammalian system, CHO cells (Chinese hamster ovary cells), as well as in the HEK cell system (human embryonic kidney cells). "You can put anything you want on the tagged protein," she says, "You ...

Miscarriage and infertility treatment increase pre-eclampsia risk

... was not linked to an increased risk, even though hormone stimulation is part of the procedure. Different causes of infertility (polycystic ovary syndrome, blocked Fallopian tubes etc.) can probably explain the difference in risk for pre-eclampsia. It is likely that factors in mothers that ...

Female plant 'communicates' rejection or acceptance of male

... pollen proteins would bind to them. These two pistil proteins were used because they directly influence the growth of pollen down the pistil to the ovary where fertilization takes place. Three proteins, S-RNase-binding protein (SBP1), the protein NaPCCP and an enzyme, bound to the pistil proteins. ...

Biologists discover gene behind 'plant sex mystery'

... pollen grain could produce 'twin' sperm cells. One to join with the egg cell to produce the embryo, and the other to join with a second cell in the ovary to produce the endosperm, a nutrient-rich tissue, inside the seed. Double fertilisation is essential for fertility and seed production in ...

Low sperm count may be associated with prenatal testosterone excess

... First, the exposure may be a product of increased sexual steroids in the maternal environment due to a hormonal condition such as polycystic ovary syndrome. Second, humans are exposed to several industrial pollutants which can act as steroid mimics, causing the body to inhibit or accelerate ...

As rates rise, researchers find better way to identify melanoma

... to play a role in tumor formation in a number of cancers. In previous studies expression of the IMP-3 protein has been linked to pancreas, kidney, ovary and lung cancers, but this is the first published study to demonstrate a connection to melanoma, Pryor said. Additional research is needed to ...

Researchers discover a gene that regulates and blocks ovulation

... children. "This is an important development, since 15 percent of couples are infertile," said Dr. Murphy. "The widespread role of this gene in the ovary indicates that it may be targeted to stimulate ovulation and, eventually, conception." ...

Spradling receives Gruber Foundation Genetics Prize for new genetic techniques

... cells, and Spradling's discoveries of their intracellular reorganization and specific cellular microenvironment (the stem cell "niche") within the ovary have had enormous impact on the field of stem cell biology. Laureates of the Gruber Genetics Prize: 2007: Maynard V. Olson, for his ...

Quest for better treatment for effects of menopause

... the genetic factors influencing the response to these therapies. Menopause is a natural period in the ageing process of a woman. On ceasing the ovary function, the body gradually stops producing eggs and female sex hormones (amongst these being oestrogen and progesterone), responsible for ...

Crop scientists discover gene that controls fruit shape

... Tanksley, van der Knaaps advisor while she was a post-doctoral associate there influences the future look of a fruit before flowering, early in the ovary development. ...

UT Southwestern researchers identify hundreds of genes controlling female fertility

... The researchers focused on a gene called Foxo3, which controls follicle activation. Normally, follicles are activated on a staggered schedule, so an ovary contains follicles at many different stages of development. In female mice genetically engineered to lack Foxo3, the follicles are normal at ...

Drug could improve pregnancy outcomes in wider range of women with insulin resistance

... and gynecology. The finding, published online in Diabetes, suggests that Metformin could benefit women with type 2 diabetes or polycystic ovary syndrome (PCOS). About 8 percent of women trying to conceive have insulin resistance, Moley says, and even more are suspected to be borderline. In ...

Study finds how organs monitor themselves during early development

... beyond understanding of how a gonad such as the ovary develops," explains Dr. Ruth Lehmann, Ph.D., ... decoded the process in the developing fruit fly ovary that allows the ovary to monitor the number of germ cells it contains ...

Israeli scientists successfully transplant frozen-thawed ovaries in sheep

... after their treatment," she said. Whole ovary autologous transplants have already been ... into the upper arm, but in neither case was the ovary frozen and thawed first[2]. Another ... if they could remove, freeze and thaw the right ovary from eight sheep, including the vascular pedicles ...

Stem cells in bone marrow replenish mouse ovaries

... marrow and blood of mice can "restock" a depleted ovary with new egg cells within weeks, according to new ... hormones. Further results suggest that the ovary itself is sending out a chemical signal to the ... readying the progenitor cells to travel to the ovary and restock its egg cell supply. Although it ...

Stem cells engage in dialogue with the cells that regulate their futures

... eggs depends on the presence of a renewable source of stem cells in the ovary of the adult fruit fly. Inside the fruit fly ovary are structures called germarium which contain tiny cradles made of cap ...

Researchers identify genes in fruitflies that may shed light on human cancer spread

... are preferentially turned on in so-called border cells of the fruitfly ovary that migrate during normal development. Two main types of genes came out ... to a final destination." Although border cell migration in the fruitfly ovary may seem a far stretch for studying human cancer metastasis, the genes ...

The power of one: A simpler, cheaper method for cell fusion

... I believe that could open up a lot of exciting research opportunities." Lu demonstrated the efficacy of his device using Chinese hamster ovary cells, which were chemically engineered to link prior to fusion. He said his technology could be developed to fuse different types of cells in the ...

Researchers discover that sheep need retroviruses for reproduction

... their genetic material into the DNA of host cells, he said. During evolution of mammals, some retroviruses infected the germline (cells of the ovary and testis that have genetic material that are passed to their offspring) of the host, which is then inherited by their children. These ...

Major cancer study aims to identify protein markers for early-stage disease

... specific antigen (PSA) hint at the presence of prostate cancer, while elevated levels of cancer antigen 125 (CA-125) suggest possible cancer of the ovary or other organs. However, both tests have "false negatives" or "false positives," making them unreliable. If mass spectrometry can be refined and ...

New technology addresses female fertility preservation

... Biological Engineering. "This system establishes a core technology for human egg banks for preservation of fertility." The technology mimics the ovary and its environment. Follicles (each follicle has one egg) from mice were grown in vitro until fully matured by providing the follicles and eggs with ...

Even when faint, ovary scent draws sperm cells

... scientists at Indiana University Bloomington report biochemical machinery that allows mouse sperm cells to follow the weakest of scents. Even when ovary extracts were diluted 100,000 times, some sperm cells still found their mark. A video demonstrating sperm chemotaxis (oriented motion in response ...

One-third of adults with diabetes still don't know they have it

... have had diabetes that developed during pregnancy (gestational diabetes) or have given birth to a baby weighing more than 9 pounds have polycystic ovary syndrome, a metabolic disorder that affects the female reproductive system have acanthosis nigricans (dark, thickened skin around neck or armpits) ...

New weapon in battle against osteoporosis

... treated these mice with an active substance that bonds specifically to the CB2 receptor. In this way we were able to diminish the bone loss caused by ovary removal," explains the molecular biologist. Many patients carry a particular variant of the CB2 gene But how far can these results be ...

ASU researchers find link between social behavior, maternal traits in bees

... and reproductive traits. Amdam also found it remarkable that other physiological traits known to differ between the two strains also correlated with ovary size in the experiment. The success of Amdam's research could prove more far-reaching than just the evolution of bee social behavior--scientists ...

New Discovery May Help Doctors Treat Infertility

... reported in Endocrinology, published in August, 2005. “What we found is that the beta estrogen receptor plays a role in moving the egg outside the ovary so it can be fertilized,?said Kenneth Korach, Ph.D., Laboratory Chief at the National Institute of Environmental Health Sciences (NIEHS) where the ...

By creating molecular bridge, scientists change function of a protein

... the researchers gradually changed the function of the human estrogen receptor alpha, a nuclear hormone receptor mostly expressed in the prostate, ovary and urinary tract. What they did was modify the estrogen receptor in a step-wise fashion, Zhao said. They used testosterone and progesterone to build ...