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Glands in Biological News

Stress puts double whammy on reproductive system, fertility

... of glucocorticoids, Kirby removed the adrenal glands of male rats, eliminating the source of the ... which are released from the adrenal glands in response to stress, and that removal of the adrenal glands prevents the stress-induced, up-regulation of ...

Dioxins in food chain linked to breastfeeding ills

... has an adverse effect on the way mammary glands develop during pregnancy." Dioxins are ... dioxin impairs the normal development of mammary glands during pregnancy. However, the underlying ... This is important, Lawrence said, because mammary glands have a high rate of cell proliferation, ...

Simple drug treatment may prevent nicotine-induced SIDS: Study

... For some months after birth, the adrenal glands act as a critical oxygen sensor. A drop in blood ... explains Buttigieg. "In this case, the adrenal glands do not release catecholamines during hypoxia for ... which override the brake protein, the adrenal glands were able to respond to oxygen deprivation, ...

A combined tooth-venom arsenal revealed as key to Komodo dragon's hunting strategy

... (Varanus komodoensis) has the most complex venom glands yet described for any reptile, and that its close ... of a preserved dragon head revealed complex venom glands and specialised serrated teeth which create deep ... researchers located and surgically excised the glands from a terminally ill dragon at the Singapore ...

Komodo even more deadly than thought: Research

... is truly poisonous. It has modified salivary glands that deliver both hypertensive and ... imaging revealed the dragons have complex venom glands as well. After surgically excising the glands from a terminally ill dragon in a zoo, the ...

Keeping chromosomes from cuddling up

... chromosomes, the researchers used the salivary glands from normal Drosophila melanogaster fruit flies. Fruit fly salivary glands are unusual, because they have many copies of the ... The scientists then looked at the salivary glands at the two temperatures to see what happened when ...

Primate's scent speaks volumes about who he is

... make use of scent," she said. "The diversity of glands is just amazing." Ringtailed males have scent glands on their genitals, shoulders and wrists, each of ... different scents. Other lemur species also have glands on their heads, chests and hands. Add to these ...

Making flies sick reveals new role for growth factors in immunity

... so when he extended Johnson's project. Since both the heart and the lymph glands in the fly originate from the same tissue (cardiogenic mesoderm), he ... when heart development goes awry in fruit fly Dpp mutants that the lymph glands might also be affected. "One of the functions of the lymph gland in ...

The body's own 'cannabis (marijuana)' is good for the skin

... came to this conclusion by treating cell cultures from human sebaceous glands (the glands that make the oil on our skin) with various concentrations of ...

Story ideas from the Journal of Biological Chemistry

... the Silky Spider Web Web-making spiders employ a host of silk glands to synthesize a variety of silk filaments with different mechanical properties. Although it is widely believed that the aciniform glands are one such silk factory, there has been no hard evidence linking ...

Stomach stem cell discovery could bring cancer insights

... (or lineages) of specialized cells needed to form the functional stomach glands that line the lower portion of the stomach. This property of multi-lineage ... Gastroenterology. The epithelial cells that make up the millions of glands of the stomach are constantly turning over. Most of the mature functioning ...

Animal and plant communication at the ESA Annual Meeting

... a watery demise. The plant then dissolves the insect and uses it for food. Biologists have long assumed that in addition to their nectar-producing glands that attract prey to a potential food source, the plants' bright colors mostly shades of red and green help to attract insects. Like bees that are ...

Colorectal cancer

... the United States, 106,100 cases of colon cancer will occur and 49,920 patients will die both from colon and rectal cancer in 2009. Beginning in glands in the bowel lining, colorectal cancer often remains undiscovered initially. "However, the main problem is not the primary tumor," explained the ...

DuoCort: New chronotherapy for adrenal insufficiency

... life-saving therapy throughout their lives. Treatment of adrenal insufficiency involves replacing, or substituting, the hormones that the adrenal glands are not making. Cortisol is replaced using hydrocortisone, the synthetic form of cortisol, and sometimes with other corticosteroids. There are ...

Not 1, but 2 kinds of males found in the invasive round goby

... of males produced sperm, but sneakers produced more sperm than the parental males, and had bigger testes. By contrast, parental males have bigger glands used to produce pheromones that attract females. ...

American Chemical Society Weekly PressPac -- April 1, 2009

... the skin. Until now, however, nobody had identified the specific chemicals involved in this devious action. The scientists collected salivary glands from hundreds of adult female black flies and isolated the proteins using high-tech analytical gear. They identified 72 different proteins, including ...

A paradigm shift in immune response regulation

... dysplasia is a hereditary disease, which affects 1 to 5 children in 10,000 newborn. It causes the skin to be very thin and the perspiratory glands to malfunction. In some cases it is combined with immune deficiency. The molecular defect is a mutation in the NEMO gene, which blocks the activation ...

Disabling enzyme allows mice to gorge without becoming obese, new study finds

... the major players in controlling fat metabolism and body weight were endocrine factors, primarily hormones that are secreted by different organs and glands and travel through the bloodstream to fat tissue, the authors said. The new findings show that a large portion of the action is occurring within ...

Farming and chemical warfare: A day in the life of an ant?

... ants have evolved special crypts on their bodies where the bacteria live and grow. Scientists believe that the ants feed the bacteria through glands connected to these crypts," said Dr Garret Suen, a post-doctoral fellow in Professor Currie's lab. "Also, the bacteria get a protected environment in ...

Zoologists: Sea snakes seek out freshwater to slake thirst

... dogma" that the roughly 60 species of venomous sea snakes worldwide satisfy their drinking needs by drinking seawater, with internal salt glands filtering and excreting the salt. Experiments with three species of captive sea kraits captured near Taiwan, however, found that the snakes refused ...

Green tea may delay onset of type 1 diabetes

... the genetic defects that cause symptoms similar to human type 1 diabetes and Sjogren's syndrome, so the immune cells attack the pancreas and salivary glands until they are no longer functional." Another related finding was that even when salivary cells were under attack, they seemed to be rapidly ...

National Science Foundation grants Clemson professors award to develop nanoprobes

... see how these conduits that nature invented work." Kornev cites one potential application as the ability to draw tiny samples of saliva from the glands of chemotherapy patients who often experience painful dry mouth as a side effect of their treatment. Other possible applications include extracting ...

New meat-eating dinosaur from Argentina had bird-like breathing system

... body heat. Sereno is especially intrigued by heat loss, given that Aerosteon was likely a high-energy predator with feathers but without sweat glands as in birds. At approximately 30 feet in length and weighing as much as an elephant, Aerosteon might well have used an air system under the skin to ...

Meat-eating dinosaur from Argentina had bird-like breathing system

... said he is especially intrigued by heat loss, given that Aerosteon was likely a high-energy predator with feathers but without the sweat glands that birds possess. At approximately 30 feet in length and weighing as much as an elephant, Aerosteon might well have used an air system under the ...

Deadly rugby virus spreads in sumo wrestlers

... It is spread through direct skin-to-skin contact so it is common among rugby players and wrestlers. Symptoms can start with a sore throat and swollen glands and the telltale blisters appear on the face, neck, arms or legs. The disease is highly infectious, so players who are infected are often taken out ...

Biomarker predicts malignancy potential of HG-PIN lesions in the prostate

... analyzed HG-PIN lesions from 140 patients: the positive control group comprised 79 patients diagnosed with prostate cancer who had their prostate glands surgically removed and who had been earlier diagnosed with HG-PIN; the negative control group included 11 patients with bladder cancer who had both ...

Scientists find stem cells for the first time in the pituitary

... A team of researchers led by scientists at Cold Spring Harbor Laboratory have for the first time identified stem cells that allow the pituitary glands of mice to grow even after birth. They found that, in contrast to most adult stem cells, these cells are distinct from those that fuel the initial ...

Many African-Americans have a gene that prolongs life after heart failure

... the response to adrenaline and similar hormonal substances that increase how hard the heart works. Adrenaline is a hormone released from the adrenal glands that prompts the "fight-or-flight" response it increases cardiac output to give a sudden burst of energy. In heart failure, decreased blood flow ...

Evidence now suggests eating soy foods in puberty protects against breast cancer

... cells that have lost growth control. Other associated research has found that the genes that genistein appears to activate in developing mammary glands are well known --- BRCA1, p53, and PTEN tumor suppressors, Hilakivi-Clarke says. These genes repair genetic damage and control cell survival and ...

T-cadherin affects blood vessel growth in breast cancer, hormone from fat cells may play a role

... breast tumors with fewer blood vessels. When the adenocarcinoma tumors were transplanted into normal and T-cadherin-deficient mammary glands the knockouts were deficient in growing new blood vessels to the graft. Stunting blood vessel growth restricts tumors and prolongs survivala ...

New, noninvasive prostate cancer test beats PSA in detecting prostate cancer

... in use worldwide, which can accurately detect prostate cancer in men with the disease but which also identifies many men with enlarged prostate glands who do not develop cancer, researchers say. Even the newer PCA3 test, which screens for a molecule specific to prostate cancer and which is now in ...

New research explains link between smoking and SIDS

... the adrenal glandsplay in a babys transition to the outside world. During birth, the baby is exposed to low oxygen, which signals the adrenal glands to release the catecholamines, which contain adrenaline, or the fight or flight hormone, explains Buttigieg. It is these catecholamines that ...

Monkey malaria widespread in humans and potentially fatal

... Malaria, which kills more than one million people each year, is caused when Plasmodium parasites are passed into the bloodstream from the salivary glands of mosquitoes. Some types, such as P. falciparum, found most commonly in Africa, are more deadly than others. P. malariae, found in tropical and ...

Tips from the Journals of the American Society for Microbiology

... fever and rash. Studies indicate that by age 3 the majority of children have been infected by HHV-6, after which the virus persists in the salivary glands into adulthood. The virus may remain dormant or reactivate in immunocompetent or immunocompromised individuals. Over a span of four years, ...

Researchers: No faking it, crocodile tears are real

... and huffing, a behavior that often accompanies feeding. Air forced through the sinuses may mix with tears in the crocodiles lacrimal, or tear, glands emptying into the eye. But one thing is sure: faux grief is not a factor. In my experience, Vliet said, when crocodiles take something into their ...

Does the victim affect snake venom composition?

... colleagues from the National University of Singapore examined two kinds of sea snakes. They constructed complementary DNA libraries from the venom glands of the reptiles, representing only the stretches of DNA that code for venom gland proteins, and studied two types of protein toxins. The three-finger ...

UC Riverside biologist receives prestigious MacArthur Fellowship

... move, trap and store food, and to reproduce because of their extraordinary mechanical properties. Different proteins are made and mixed in the silk glands of spiders to create the silk. For more than a decade, Hayashi has been performing the molecular and mechanical characterization of these silks. ...

Understanding hypertension in African Americans proves elusive

... too much of it can contribute to the development of hypertension because it causes the kidney to retain salt. Aldosterone, released by the adrenal glands on top of the kidneys, plays a role in the complex system used by the body to regulate blood pressure. Although the results are discouraging for ...

LIAI scientists make important finding on cytomegalovirus transmission

... shown that cytomegalovirus (CMV) in the salivary glands can be reduced ?and in some cases eliminated ... virus infections." Ware noted that the salivary glands are a primary source of transmission for many ... the action of the IL-10 protein in the salivary glands of mice by inhibiting binding of IL-10 to its ...
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