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Tag: "vessels" at biology news

MIT nanoparticles may help detect, treat tumors

...nd enter tumors. Solid tumors must form new blood vessels to grow. But because this growth is so rapid in cancerous tumors, there are gaps in the endothelial cells that line the inside of the blood vessels. The nanoparticles can slip through these gaps to enter the tumors. Once inside the tumor, the nanopa...

Scientist works to improve treatment for brain tumors

... what causes hypoxia ?one theory is that the blood vessels in tumors are underdeveloped compared to the needs of rapidly proliferating cells. They also aren't sure how it affects treatment using cytotoxins. Do the hypoxic regions of a tumor need more or less drug treatment? Debinski, in collaboration with...

Ohio University researchers discover evolutionary oddity in flamingos

...cted a colored barium/latex mixture into the blood vessels of a bird that had died and was donated by the Brevard Zoo in Florida. A 3-D view of the bird's head was created using a new computed tomography (CT) scanning technique developed by the Ohio University team that highlights blood vessel anatomy. The r...

3-D ultrasound scanner could guide robotic surgeries

... could fit inside catheters threaded through blood vessels to view the vasculature and heart from the inside. Earlier this year, the team reported another advance: a 3-D ultrasound device including 500 tiny cables and sensors packed into a tube 12 millimeters in diameter -- small enough to be inserted thro...

New angiogenesis finding may help fight cancer growth

...he regulation of blood vessels. Normally, blood vessels form when wounds heal and during menstruation, pre...r cause of blindness, and tumors rely on new blood vessels as they develop. Like most critical body processes, angiogenesis is tightly controlled by multipl...

New treatment for severe malaria

...he blood cells conglomerate and lodge in the blood vessels is that once in the blood cell the parasite produces proteins that project from the surface of the cell and bind with receptors on other blood cells and on the vessel wall, and thus act like a glue. The challenge facing scientists has been to break t...

A surprise about our body clock

...zes quickly and stimulates the growth of new blood vessels in the heart. This is the first step in repairing the heart and in preventing the vicious downward spiral of heart failure in which the heart progressively thins and dilates, eventually causing death." Despite advances in surgical procedures, mechani...

Healing the heart with bone marrow cells

...zes quickly and stimulates the growth of new blood vessels in the heart. This is the first step in repairing the heart and in preventing the vicious downward spiral of heart failure in which the heart progressively thins and dilates, eventually causing death." Despite advances in surgical procedures, mechani...

Movie spies on malaria parasite's sneaky behavior

... fluorescent marker and staining the mouse's blood vessels with a red fluorescent marker, Amino was able to record microscopic images inside the animal's liver. He found that not only did the structures Heussler's group saw on the liver cells in the culture dish, called merosomes, protrude from the animal's ...

Coming soon: 3-D imaging that flies 'through' and 'around' cancer

...rdiovascular imaging, providing 3-D views of blood vessels and possibly identifying individuals at risk for heart disease," he predicted. In the case of a patient with colorectal cancer--a term used to refer to cancer that develops in the colon or rectum and is the second leading cause of cancer-related de...

Study identifies new role for breast cancer susceptibility gene

...king mutation of BRCA1 to formation of large blood vessels needed to support cancer progression. The findings demonstrate that, in addition to an impaired DNA damage response associated with cancer initiation, mutation of BRCA1 is also linked to manipulation of the tumor microenvironment. The research appear...

Schepens scientists are first to discover angiogenesis switch inside blood vessel cells

...ay help design drugs that could dismantle existing vessels by targeting this switch inside the vessel cells."... body sends growth factors (such as VEGF) to blood vessels in the "needy area" to bind to receptors on the surface of the endothelial cells. This binding the...

Fatty spheres loaded with siRNA shrink ovarian cancer tumors in preclinical trial

...reatment steeply reduced the number of small blood vessels feeding the tumor, cut the percentage of prolifera... between 65 and 125 nanometers in diameter. Blood vessels that serve tumors are more porous than normal blood vessels, with pores of 100 to 780 nanometers wid...

Scientists discover why cornea is transparent and free of blood vessels, allowing vision

...sease and illnesses such as cancer, in which blood vessels grow abnormally and uncontrollably, since this phe...nd with a protein receptor called VEGFR-2 on blood vessels to trigger vessel growth. Three forms of VEGF--A, C, and D--bind with this receptor. Two of them, C...

Stanford doctors advance in bid to turn mice stem cells into blood vessels

...icine have taken a first step toward growing blood vessels from stem cells that could eventually be transplan...sts hope to be able to eventually grow whole blood vessels that can be transplanted back into mice. The work is being performed in the laboratory of Christoph...

Viagra improves high altitude exercise performance up to 45% for some

...al of Applied Physiology. Drug expands the blood vessels Sildenafil citrate is best known as Viagra, a dru...ed to relieve high blood pressure. It causes blood vessels in certain tissues, such as the lungs, to relax. This improves blood flow from the heart and increas...

How can identical twins be genetically different?

...in angiogenesis, a process that recruits new blood vessels to an area. In the early stages of RA, the tiss...ade tissue, uses angiogenesis to recruit new blood vessels to supply it with nutrients. The angiogenic factor Cyr61 could be involved with this process. "Thi...

Antarctic Treaty Meeting moves to protect frozen continent from non-native species

...tica. Under the new guidelines drawn up by the UK, vessels will need to exchange any ballast water before arriving in Antarctic waters, and plan for and keep records of all ballast water operations. According to Dr John Shears of British Antarctic Survey, "In the past, Antarctica was isolated with a very ha...

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

... armpits) have a history of disease of the blood vessels to the heart, brain, or legs have had IFG or IGT on previous testing. ...

Pigeons provide clue to solving common problem in heart patients

...e discovered a clue about why some patients' heart vessels are prone to close back up after angioplasty. "...these cells could potentially solve the problem of vessels re-closing after angioplasty." The work is reported in the August issue of Experimental and Molecu...

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