Tag: "organs" at biology news

Scientists Identify Gene For Sexual Behavior In Male Flies

...lesex" ( dsx )commands the development of male sex organs and other malecharacteristics, while "fruitless" ( fru ) commands male sexualbehavior. Genes higher up in the family tree act to turn off dsx and fru so that female flies do not exhibit male sex organsor male behavior. (courtesy: Bruce Baker, Stan...

Duke Study Shows Early Marrow Transplant Key To 'Bubble Boy' Disease Cure

...arrow cannot rise upand attack the patient's vital organs -- a common complication with bonemarrow transplants. And, by removing these cells before the transplant, the infant avoidsthe toxic drugs normally given to suppress the donor's T-cells. Results from the study of 79 SCID patients who rec...

Stopping "Cellular Suicide" Could Boost Production In Biotech Labs

...ey may also be able to extendthe life ofartificial organs made from animal tissue. The key is to halt apoptosis, which is often triggered by changesin acell's environment. "It may be a viral infection, the loss of akey nutrient,radiation or a chemical toxin--all at sub-lethal levels,"Betenbaugh explains."Th...

Second Gene Responsible For Tuberous Sclerosis Complex Identified

...clude tumors of the brain, kidneys, eyes, andother organs and a salmon-colored, seed-like rash on the face. These facialbumps are actually small benign tumors that have a vascular, dermal, andconnective tissue component to them. Individuals with TSC may also experiencediminished intellectual function, aut...

Female Fireflies Lure Males For Defense Chemical

...e fancy flashers, and they signal with their light organs in characteristic, species-specific patterns of flashes. They watch for females to respond to their pattern with single flashes." The password from the female of the appropriate species is encoded in the time-delay between the male's flash pattern a...

A New Biochemical Link Established Between Stress, Sex And Dominance

...colors, the extra muscles and the fully mature sex organs of a dominant "territorial" male. Stress appears to prevent all but the dominant males from achieving reproductive success. Fernald said that since many species have evolved dominant and non-dominant males, the role of stress hormones in social syst...

Researchers Discover First Animal Strain Of Hepatitis E Virus

...th concern regarding the use of pig organs in human transplantation," cautions Dr. Purcell. "Nonpathogenic pig viruses could possibly become pathogenic in human transplant recipients, particularly since transplant patients receive ...

UT-Houston Awarded $2.5 Million For Scleroderma Research

... thehardening of the skin and scarring of internal organs which afflict sufferers. By establishing a SCOR in scleroderma, the NIH is enabling scientists andphysicians to attack the problem on a broad front, offering hope to theapproximately 500,000 Americans diagnosed with the disease. The center's...

Autoimmunity Gene Discovered

...ts generate autoantibodies against the affected organs which consequently become functionless during the course of the life-long disease. APECED is known to be an inherited condition and in 1994 the disease locus was localized to chromosome 21q22.3 by Pr Leena Peltonen's group from the Na...

MIT Biologists Identify Aging Mechanism

...stem orprogenitor cells in mammals -- are found in organs such as the skin, kidney,liver and blood. The authors suggest, too, that yeast mother cells may be analogous to mammalianstem or progenitor cells, just as SGS1 was homologous to the human WRN gene.Thus, the next phases of aging research have been def...

Peutz-Jeghers Disease Gene Identified: Enzyme Loss Causes Polyps And Cancer

...tion in the gastrointestinal tract and in other organs is currently unknown. The search for physiological STK11 substrates will yield further insights into the complicated intracellular network of molecules that prevents the development of hamartomatous and preneoplastic lesions in various ti...

Garlic Prevents Hardening Of Aorta, New Study Shows

...ynamic organ in itself. The aorta helps keepother organs healthy, because it regulates the velocity of the ...locity is not too fast,it prevents damage to other organs like the brain and kidneys,” saidBoudoulas. “So maintaining a healthy aorta may prevent d...

Studies Underscore Link Between Nutrition And Nonmelanoma Skin Cancers

...already part of most diets, and they benefit other organs aswell," he said. "Everyone can benefit from eating more fruits and vegetables."...

UF Researchers Use Gene Therapy To Prevent Hypertension, Organ Damage

...e can prevent hypertension anddamage to the target organs up to at least 120 days in rats. While thisparticular study would not be performed in a clinical setting, 120 days isthe equivalent of 15 to 20 years in a human," he said. High blood pressure kills about 40,000 people each year in the United...

UPMC Researchers Report On Gene Therapy Advances

...e leg bone and subsequently detected them at other organs and bones ofthe treated mice. Presumably, these c...rysystem. While the cells were cleared from other organs at 10 days after theinjection, genetically marked cells remained in the bone 30 days aftertransplant...

Butterfly Wings, Beetle Horns Teach Biologists Basic Lesson In Development's Laws

... how organisms make fine size adjustments to their organs and tissues.The scientists said their hope is that the mechanisms they discover in insectswill also teach lessons about development in higher animals, including mammals....

One Year Follow-Up Of Non-Invasive Angina Treatment Suggests A Lasting Benefit

...e, called diastole. Theheart muscle, unlike other organs and tissues, gets most of the oxygen itneeds during diastole. The treatment, called Enhanced External Counterpulsation (EECP), issuitable for many heart patients, and may be used in conjunction withcoronary bypass surgery or balloon angioplas...

NIGMS Makes First Awards For

...anDiego, CA) An investigation of how tissues and organs grow to specific sizes andproportions. The researcher proposes that tissue size and shape are controlledby a competition between cell division and cell death. He plans to study fruitflies--which utilize many of the same genetic pathways as humans--t...

Research Sheds Light On How Plants Regulate Distribution Of Nutrients

...tingorganic nutrients from the leaves to different organs as needed. "Ina period of drought, you may see leaves stunted, in a holding pattern, butthe roots are proliferating," Bush said. "How does the plantallocate resources? "This finding is an important first step in understanding resourceallocation," ...

Mice Lacking The Pax8 Gene Suffer From Hypothyroidism And Fail To FormThyroxin-Producing Cells Of The Thyroid Gland

...shown to participate in the formation of different organs including the eyes, kidneys and the pancreas. A year ago, the same department led by Prof. Peter Gruss published two reports in Nature indicating the role of members of the same family of genes, Pax4 and Pax6,...

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