health 38

"This unique hybrid nano-network allows for an exceptional combination of selective guidance stimuli for stem cell development, variations in immune reactions , and behavior of cancer cells," says Professor Michael Gasik from Aalto University. These scaffolds, for example, were shown to be able to direct the preferential orientation of human mesenchymal stem cells, similarly to neurogenic lineage, to suppress of major inflammatory factors expression and to immobilize cancer cells. The selective downregulation of specific inflammatory cytokines may be anticipated as a new tool for understanding the human immune system and ways of treating associated diseases. The effects observed are self-regulated by cells only, without the side effects usually arising from the use of external factors. New scaffolds may help to control the fate of stem cells, such as development towards axons and neurites formation. This is important, for instance, in the development of Alzheimer...

Researchers at Michigan State University published this finding in the current issue of  Genes and Cancer . While treatments based on this key discovery are still years away, the results give scientists a key foundation on which to build future research. "You can watch bears in the zoo, but you only understand bear behavior by seeing them in the wild," said David Arnosti, MSU biochemistry professor, director of MSU's Gene Expression in Development and Disease Initiative and co-author of the study. "Similarly, understanding the expression of genes in their natural environment reveals how they interact in disease settings. That's what is so special about this work." The brain manufactures melatonin only at night to regulate sleep cycles. Epidemiologists and experimentalists have speculated that the lack of melatonin, due in part to our sleep-deprived modern society, put women at higher risk for breast cancer. The latest MSU study showed that melatonin s...

The study was published August 24 in  Nature Communications . Due to the Zika virus, the world is suffering from its first known epidemic of microcephaly, a devastating brain developmental condition that substantially reduces the number of neurons in the brain, along with brain size and function at birth. Mutations in a number of human genes have been implicated in causing the relatively rare occurrence of this disease. Mutations in one such gene -- NDE1 (referred to as "nood-E") -- cause a particularly severe form of microcephaly. The Columbia researchers -- David Doobin, an MD/PhD student, Richard Vallee, PhD, professor of pathology and cell biology, and others in Dr. Vallee's lab -- reasoned that investigating NDE1's role in microcephaly should provide important clues to the causes of microcephaly in general. In the study, the researchers found that interfering with NDE1 expression severely inhibited the proliferation of stem cells in the developing rat bra...

Studies in mice suggest that some of our white blood cells are only formed during the fetal period, and stay with us for the rest of our lives. The blood stem cells in the embryo are particularly capable of maturing into a proper immune system, and the question as to why they do not continue to do so in adults has been discussed among researchers for a long time. A research group at Lund University is now one step closer to finding the answer. "By assigning a 'barcode' to the stem cells, we were able to track their performance over long periods of time and see which cells in the blood and the immune system they can induce. Without the barcode, we only see a bunch of red and white blood cells, without knowing how they are related. This allows us to track which stem cell has given rise to which subsidiary cells, and thereby distinguish the family tree in the blood," explains Joan Yuan, research group leader. The barcodes enable researchers to see how individual s...

A crab-eating monkey embryo post-implantation (14 days after fertilization). New analysis exhibits that sure primate stem cells have pluripotency superior to some varieties derived from mice. The examine, printed in Nature, maps how pluripotency differs amongst mice, monkeys, and people, and illustrates for the primary time the traits distinctive to primate stem cells. Credit score: Mitinori Saitou Not too shabby, people. New analysis exhibits that sure primate stem cells have pluripotency superior to some varieties derived from mice. The examine, printed in  Nature , maps how pluripotency differs amongst mice, monkeys, and people, and illustrates for the primary time a developmental counterpart of primate stem cells. "We recognized a gene set helpful for predicting the properties of human and monkey pluripotent stem c...

Researchers at NYU Langone Medical Center and its Perlmutter Cancer Center say their findings, which resulted from experiments in mice and human cells, suggest that placing strict biological controls on a portion of the protein complex, known as Mediator Complex Subunit 12, or MED12 for short, could serve as a tool for stopping a variety of cancers. MED12 mutations, they note, have been linked to several kinds of leukemia, as well as cancers of the prostate, uterus, and connective tissue. Researchers say their latest experiments, described in a report in the journal  Cell Stem Cell  online Aug. 25, are believed to be the first to fill in the details about how MED12 is vital to the growth of hematopoietic stem cells, or HSCs, in bone marrow, to keep blood cells healthy. Three other proteins known to be tied to the active part of the mediator complex were tested and found to not be essential to HSC development, confirming MED12's prominence, they say. "Because MED12 appe...

New analysis has demonstrated how cancers can begin in stem cells. Credit score: Most cancers Analysis UK Scientists have demonstrated for the primary time the 'good storm' of situations that cells want to start out forming most cancers, serving to to elucidate why some organs are extra prone to creating the illness, in keeping with a brand new examine printed in  Cell . The analysis, carried out by scientists at Most cancers Analysis UK's Cambridge Institute on the College of Cambridge and St Jude's Kids's Analysis Hospital in the USA, reveals that cancers usually tend to begin in stem cells -- particular cells that replicate themselves so the physique can develop new cells, restore broken tissue and change previous cells. However whereas these stem cells are extra prone to creating into most cancers, in...

Salk researchers created kidney progenitor cells that survive within the lab utilizing Three-D tradition and a mixture of supporting molecules. The know-how may assist level to new cell therapies. Credit score: Salk Institute Salk Institute scientists have found the holy grail of infinite youthfulness -- at the very least in terms of one kind of human kidney precursor cell. Earlier makes an attempt to take care of cultures of the so-called nephron progenitor cells typically failed, because the cells died or progressively misplaced their developmental potential quite than staying in a extra medically helpful precursor state. However by utilizing a three-dimensional tradition and a brand new combination of supporting molecules, Salk researchers have efficiently suspended the cells early of their improvement. Such early-stage kidn...

During early development in an embryo, the progenitor cells of many types of musculoskeletal tissue start out in close contact to each other and over time transition into an organized network of individual cells surrounded by an extracellular matrix (ECM). This matrix is made up of polysaccharides and fibrous proteins secreted by cells, providing structural and biochemical support to the cells within. Throughout the course of embryo development, the ECM gets stiffer due to increased amounts of matrix material and crosslinking, eventually guiding stem cells to develop into more specialized cells across various tissue types. It also acts as a medium through which mechanical information is transmitted to cells (such as forces generated with such normal activities as walking or running). Mauck and his colleagues developed a new biomaterial that allows scientists to systematically study how the cell-to-cell interactions present in early development combined with cell-ECM interactions ...

This schematic exhibits position of RNA splicing in secondary acute myeloid leukemia. Credit score: UC San Diego Well being Researchers at College of California San Diego Faculty of Drugs and Moores Most cancers Heart have recognized RNA-based biomarkers that distinguish between regular, getting older hematopoietic stem cells and leukemia stem cells related to secondary acute myeloid leukemia (sAML), a very problematic illness that usually afflicts older sufferers who've typically already skilled a bout with most cancers. The findings, printed on-line August 25 in  Cell Stem Cell , counsel a brand new method to predict leukemic relapse early and to determine potential targets for brand spanking new drug growth. Secondary AML usually follows a continual pre-malignant illness or therapy for different cancers. Consequently, suf...