Tag: "glands" at biology news

Gene Vaccine Protects Mice Against Development Of Her2/neu Breast Cancer

...y develop breast cancer in allten of their mammary glands by the time there are 120 days old. In thisexperiment, they vaccinated the mice three times with VRP-neu, and “nota single mouse developed a tumor,?says Lachman.Lachman suggests the vaccine might prove helpful in keeping humanHER2/neu tumors from met...

A comprehensive response to HIV could prevent 10 million AIDS deaths in Africa by 2020

...y develop breast cancer in allten of their mammary glands by the time there are 120 days old. In thisexperiment, they vaccinated the mice three times with VRP-neu, and “nota single mouse developed a tumor,?says Lachman.Lachman suggests the vaccine might prove helpful in keeping humanHER2/neu tumors from met...

Compounds in plastic packaging act as environmental estrogens altering breast genes

...apable of affecting gene expression in the mammary glands of young female laboratory rats exposed to the compounds through their mothers' milk. Raquel Moral, Ph.D., a postdoctoral associate in the Fox Chase laboratory of Jose Russo, M.D., presented the results today at the 96th Annual Meeting of the Americ...

Venom doc tracks down snake bioweapons

...ich belong to the superfamily Colubroidea, evolved glands for the storage and dispersal of their saliva approximately 60-80 million years ago. Since that time, various prey-immobilizing toxins have evolved from innocuous proteins that were normally produced in other body tissues. Scientists believe that sn...

Bugs, even 'bad' ones, can be educationally beneficial, new book says

...an analogue of a mammalian uterus. "Milk-secreting glands that empty into the 'uterus' feed the developing larva. Tsetse milk is white and chemically similar to human or cow's milk," Waldbauer wrote in a chapter titled "Guaranteeing descendants: The role of parental care." Waldbauer emphasizes that insects...

Study: Well-known protein helps stem cells become secretory cells

... secretion, which is a critical ability of certain glands and cell types in organisms from insects to humans. The researchers discovered that a protein called CrebA single-handedly controls the entire set of events leading to secretion in the fruit fly's salivary gland and epidermis, its skin-like outer la...

Ants, not evil spirits, create devil's gardens in the Amazon rainforest, study finds

...hat the only compound produced by the ants' poison glands is formic acid, a toxin that is common in many ant species and, in fact, got its name from formica, which is Latin for ant. "Treatment of leaves with formic acid induced leaf necrosis on all the plants we tested," the authors write. "To our knowledge...

Researchers discover how malaria parasite disperses from red blood cells

...arum spends part of its life cycle in the salivary glands of mosquitoes and is transmitted to human beings through the bite of infected mosquitoes. The parasite infects red blood cells. Called a merozoite at the stage of its life when it infects red blood cells, the parasite multiplies inside the cell, un...

Researchers find gland that tells fruit flies when to stop growing

...and examined when larvae with enlarged prothoracic glands reached that weight compared with normal larvae. T.... She found that larvae with enlarged prothoracic glands reached critical weight earlier and at a much smaller size than normal larvae. But she also found th...

Sea slug mixes chemical defense before firing at predators

...t Charles Derby, PhD, examined the ink and opaline glands of Aplysia sea slugs for the chemicals L-lysine, L-arginine and an enzyme protein called escapin. In previous research, Derby's team determined that escapin mediates the chemical reaction with L-lysine and L-arginine that results in the defensive sec...

Nanotechnology may find disease before it starts

... able to make these particles to go to the mammary glands or other tissues we're interested in." The ultrasound images grew brighter over the 90-minute period. The researchers compared these images to those from a group of control mice injected with a saline solution. There was no change in ultrasound imag...

Scientists discover basic defect in cystic fibrosis airway glands

...airway glands. The second explanation is that the glands still secrete fluid via non-CFTR pathways, but the...thesis was correct by measuring the secretion from glands from patients with cystic fibrosis and from normal pigs. They added ENaC inhibitors to the glands t...

Worm hormone discovery may aid fight against parasitic disease

...e, in patients with Addison's disease, the adrenal glands do not produce enough of the steroids cortisol and aldosterone; in some cases, these glands produce none at all. Replacing the missing hormones through replacement therapy can relieve the symp...

Markers of gene, protein, or micro-RNA activity predict outcome in prostate and colorectal cancers

... of prostate cancer in patients who have had their glands surgically removed. In a clinical study of tumor tissue taken from 605 prostate cancer patients, those who had a positive PITX2 methylation test were three times more likely to experience cancer recurrence than those who tested negative, according t...

AIDS-related cognitive impairment exists in two separate forms

... of prostate cancer in patients who have had their glands surgically removed. In a clinical study of tumor tissue taken from 605 prostate cancer patients, those who had a positive PITX2 methylation test were three times more likely to experience cancer recurrence than those who tested negative, according t...

Researchers discover which organs in Antarctic fish produce antifreeze

... make up the pancreas. It consists of tubuloacinar glands that primarily manufacture and secrete digestive enzymes that break down food in the intestine so it can be absorbed. In this case, AFGPs are secreted into the intestinal lumen where they protect the intestinal fluid from being frozen by ice crystal...

Links between DNA damage and breast cancer studied

...ctive tissue that supports the breast's network of glands and ducts have been reported to precede the malignant conversion of tumor cells, but the actual role of stromal cells in the early stages of breast cancer initiation and progression is not well understood. In two recent papers*, the PNRI/NIST team ...

Lack of key enzyme associated with development of rare tumor

...h have discovered that a rare tumor of the adrenal glands appears to result from a genetic deficiency of an ...study was found in large amounts in normal adrenal glands and in even larger amounts in normal prostate glands, Dr. Stratakis added. Other forms of PDE11A ar...

Species unique to tidal marshes face threats

...e salts from large volumes of water or specialized glands that exude salt. Many are gray or black in color, which is believed to be an advantage because it matches the dark color of the soils often found in tidal marshes. Why endemic tidal marsh species seem to be largely restricted to North America--which ...

New understanding of parasite cell structures may provide treatments for serious tropical diseases

...anosome transfers from the mid-gut to the salivary glands where it enters the human bloodstream when the fly bites. "We found that putting these cells under stress similar to that initially encountered by the trypanosome inside the fly caused the parasites to cleave free GPIs," said Mensa-Wilmot, "and that...

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