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Tag: "resistant" at biology news

Female Antarctic seals give cold shoulder to local males

...re genetically diverse individuals tend to be more resistant to disease, carry fewer parasites, and in the case of males, are more aggressive and father more offspring. It had long been assumed that the females were passive, simply mating with their nearest male. However, using paternity tests, the scientis...

Drug-resistant bacterial infections serious complication after corrective eye surgery

...nity. These so-called community strains tend to be resistant only to beta-lactam antibiotics, unlike the hospital strains, which usually demonstrate multiple drug resistance. Community-acquired MRSA is becoming a significant problem, with the prevalence of MRSA among community isolates expected to reach as hig...

Breakthrough vaccine to treat chemo-resistant ovarian cancer

...ly stages, is a very complex disease that is often resistant to chemotherapy. Cancer Treatment Centers of America will offer this new treatment to patients whose cancer has recurred after chemotherapy. "To win the fight against cancer, it is absolutely vital we do everything we can to make innovative new t...

Genetic pathways to curable and incurable forms of pancreatic cancer identified

...ns out that the cystic pancreatic cancer cells are resistant to these effects of TGFb and these types of cancers are also less likely to invade surrounding tissues and to metastasize, or spread, to other organs. These properties likely contribute to the improved survival seen with this form of the cancer, Hing...

Antifungal drug kills TB bug

...ise in the incidence of new strains of TB that are resistant to traditional antibiotics. As a result, the World...quantities to kill the bug completely; this is how resistant strains develop and these regions have become huge breeding grounds for these ‘super strains?" Fu...

Molecular differences between early and advanced melanomas could provide new drug targets

... melanomas grow downward, the tumors become highly resistant to chemotherapy and radiation and the five-year survival rate falls rapidly, to 64 percent if the disease has reached the lymph nodes and 16 percent if it has spread to other organs. The discovery of Akt's significant role in the progression of me...

Research on grey mould offers possible breakthrough in tomato cultivation

... efficient methods whereby tomato varieties can be resistant to grey mould. The leading company De Ruiter Seeds... started off with wild tomato accessions that were resistant to grey mould. When crossing the resistant wild tomato Solanum habrochaites LYC4 with the susceptibl...

Wheat can fatally starve insect predators

...re, known as a chitin. When the larvae attack a resistant plant, the plant's lectin production quickly incre...n. However, the researchers believe that plants resistant to Hessian fly invasions may make several strains of lectins in response to virulent larvae, William...

New cell type identified in cancer development

...usly tricky to isolate and describe. They are also resistant to virtually any kind of treatment, and some scientists believe they are the reason cancer recurs. Until now, no one has known how they arise. But a team of scientists, led by Dr. Jian-Xin Gao, a researcher in the department of pathology at Ohio ...

Scientists sequence genome of parasite responsible for common sexually transmitted infection

...s to why the parasite has become increasingly drug resistant and suggesting possible pathways for new treatment...d identified possible ways the parasite may become resistant to these medications. Understanding how T. vaginalis causes infection and developing methods to prev...

Elucidation of the genome for diabetics with DNA chips

...ome hyperglycaemic when they put on weight and are resistant to the insulin they produce. The team of Philippe Froguel was the first to identify a gene associated with DT2 ?that encoding glucokinase ?in 1992. Several other such genes have since been discovered, but together these genes account for only a small...

Cancer vaccines -- Taking a jab at cancer by stimulating the immune system

...ted States alone. Pancreatic cancer is notoriously resistant to conventional cancer therapies and has one of the lowest five year survival rates of all cancers. Wild type sequence p53 as a vaccination target for squamous cell carcinoma of the head and neck: Abstract 5113 Researchers from the Universit...

Researchers urge monitoring of bone health during chemotherapy

...osteoporosis agent that inhibits osteoclasts, were resistant to the effects of G-CSF on bone tumor growth. Weilbaecher is currently investigating bisphosphonates as a means to prevent tumor metastasis to bone in breast cancer patients. "We used G-CSF as a tool to understand the implications for tumor growth...

New antibacterials being developed to tackle MRSA superbug

...ureus, or MRSA, is a form of the bacterium that is resistant to the drug methicillin and a number of other antibiotics and tends to be more difficult to treat. "The so-called superbug MRSA is fast becoming untreatable with the currently available antibiotics," says Dr Ted Bianco, Director of Technology Trans...

Trojan horse strategy defeats drug-resistant bacteria

...linical Investigation. Bacteria are increasingly resistant to antibiotics, and existing drugs work poorly aga...aeruginosa from cystic fibrosis patients that were resistant to multiple antibiotics. In mice, gallium treatment blocked both chronic and acute infections caused...

Gallium: A new antibacterial agent?

...eded because more and more bacteria are antibiotic resistant and because antibiotics are not effective at eradi... growth of Pseudomonas aeruginonsa; even multidrug resistant strains of P. aeruginonsa isolated from individuals with cystic fibrosis. Ga also prevented P. aerug...

Researchers discover surprising drug that blocks malaria

... rapidly changes its molecular structure to become resistant to those drugs. It would be difficult, however, for the malaria parasite to develop resistance to a drug that acts on a person's red blood cells as the blood pressure medication does, Haldar said. When Haldar and her colleagues tested propranolol ...

Freeze! Scientists film proteins at work by freezing them at different states

...proteins that get excited by light and are in very resistant crystals....

Researchers uncover protection mechanism of radiation-resistant bacterium

... In a 2004 study, Daly and colleagues found that resistant and sensitive bacterial cells had significantly di...llowing irradiation. The team showed that the most resistant bacterial species contained approximately 300 times more manganese and three times less iron than th...

Discovery of an HIV inhibitor in human blood points to new drug class

...emains fully active against viral strains that are resistant to other drugs," said study author Frank Kirchhoff...to remain effective against viral strains that are resistant to other antiretroviral drugs, they found. "Our data support the possibility that VIRIP may contr...

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