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Tag: "bone" at biology news

Protein fragments sequenced in 68 million-year-old Tyrannosaurus rex

...sity, and colleagues found that extracts of T. rex bone reacted with antibodies to chicken collagen, furth...ragments from 100,000- to 300,000-year-old mammoth bone samples sent by Schweitzer and colleagues. More recently, he has been working to develop mass spectr...

Cancer-killing invention also harvests stem cells

...harvests them for later use in tissue engineering, bone marrow transplants, and other applications that tr... 1999 to 2001, one of his labmates discovered that bone marrow stem cells stick to adhesive proteins called selectins more strongly than other cells -- incl...

Scientists discover new, readily available source of stem cells

...nd "re-populated" the diseased areas. In addition, bone cells produced from the stem cells were successfully used to grow bony tissue in mice, and liver cells were able to secrete urea, which the liver produces from ammonia. The potential to generate a broad range of mature cell types is why many scien...

Early-stage sperm cells created from human bone marrow

Human bone marrow has been used to create early-stage sperm c...or the experiment, Prof Nayernia and his team took bone marrow from male volunteers and isolated the mesenchymal stem cells. These cells have previously be...

Scientists clone mice from adult skin stem cells

...ng adult hematopoetic stem cells ?the cells in the bone marrow that all blood cells are derived from ?were reported last year. But their conclusions were confusing, says Mombaerts, and there are no reports on using adult stem cells for reproducible cloning of mice that survive until adulthood. By using ce...

UW launches study testing adult stem cells for heart damage repair

...release blood-forming CD34+ cells from a subject's bone marrow into the bloodstream. Then, investigators use a cell separation system to remove from the subject's bloodstream a mix of cells containing the stem cells. When this process, known as apheresis, is complete, technologists further process the ...

Researcher to study astronaut bone loss for space biology agency

...ses and possible methods of treating or preventing bone loss resulting from the prolonged weightlessness o...f applicants. "The loss of mechanical forces on bone in the weightlessness of space dramatically weakens bone," says Long. "The ability of humans to cond...

New cell type identified in cancer development

... the Sca-1 or c-kit markers, hallmarks of normal bone marrow stem cells, nor the lineage markers most of... but had been partially restored by an infusion of bone marrow cells; and the third group was made up of normal, healthy mice. The results showed that th...

Study to explore using magnets to correct 'sunken chest'

...reathing difficulties, because the abnormal breast bone can reduce blood flow to the heart and prevent the lungs from expanding completely, restricting the ability to exercise, according to Harrison. Some patients also suffer serious emotional difficulties and low self-esteem, especially since sunken che...

Researchers urge monitoring of bone health during chemotherapy

... reduce toxic side effects of chemotherapy induced bone loss and helped tumors grow in bone. So the resear... St. Louis are recommending increased awareness of bone health during cancer treatments. The medication studied is a growth factor commonly used to help c...

Hofmeyr skull supports the 'Out of Africa' theory

... Later Stone Age, with its sophisticated stone and bone tools and artwork appears in sub-Saharan Africa, and anatomically modern people appear for the first time in Europe and western Asia with the equally complex Upper Paleolithic archeological tradition. In order to establish the affinities of the Hof...

Genes may determine success of hip replacement surgery

...e artificial joint comes loose and the surrounding bone begins to dissolve. The other 71 patients had deep...at breaks down collagen, the main protein found in bone and cartilage, while interleukin 6 is a chemical involved in bone metabolism and the immune response...

Researchers first to map gene that regulates adult stem cell growth

...r of adult stem cells in the body, particularly in bone marrow. Now that it has been identified, research...unt in cancer patients undergoing chemotherapy and bone marrow transplantation. The researchers agreed that this very process is not only interesti...

40,000-year-old skull shows both modern human and Neandertal traits

...um ?named Oase 2 ?were found in a Late Pleistocene bone bed principally containing the remains of cave bears. They were recovered during a systematic excavation project directed by Professor Trinkaus and Professor Zilhao between 2003 and 2005. Radiocarbon dating of the specimen produced only a minimum ...

Growth hormone is not the anti-aging bullet for healthy adults

...improve other clinically relevant outcomes such as bone density, cholesterol levels, stamina, and longevit...d motivation, increase exercise capacity, increase bone density and (wink, wink) make wives and girlfriends happy. Despite these enticing claims, careful...

Inflammation may play role in metastasis of prostate cancer

...t inflammatory protein (cytokine) that can lead to bone loss through activation of bone resorbing cells. RANK ligand, produced by inflammatory cells that invade advanced prostate tumors,...

Elderly spinal cord injuries increase five-fold in 30 years, Jefferson neurosurgeons find

...atic spinal cord injuries due to: (1) changes in bone quality with aging (2) increasing prevalence of cervical spinal stenosis with older age (3) an increased rate of motor vehicle accidents per mile driven It is also believed that these older patients have an increased risk of mortality due to ...

Penn researchers replace organ in adult mice using 'single-parent' stem cells

...and were able to rescue other irradiated mice with bone marrow transplants from these animals. It is clear proof, according to McLaughlin, that uniparental cells could produce hematopoietic stem cells. In addition, McLaughlin's group found no evidence of disease linked to the transplanted cells. In a...

Can engineered immune cells stop AIDS?

...ject are targeting hematopoietic stem cells -- the bone marrow cells that form blood cells ?to create B ly...phocytes. The researchers want to reprogram these bone marrow cells by adding genes that will instruct the cells to produce rare antibodies such as B12, 4E...

Using dental X-rays to detect osteoporosis

... at risk, and the condition carries a high risk of bone fractures, with over a third of adult women fallin...fic characteristics of the radiographic trabecular bone pattern. These features include, among others, the thickness, the amount of fragmentation, and the m...

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