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Harm-reduction cigarettes are more toxic than traditional cigarettes, UC Riverside study finds

A UC Riverside study reveals that harm-reduction cigarette smoke retains toxicity and can adversely affect reproductive development in mice and may pose risks to human pregnancies. The research found that both mainstream and sidestream smoke from traditional and harm-reduction brands are toxic to pre-implantation embryos.

SourceUniversity of California - Riverside·JournalHuman Reproduction·DateDec 8, 2008

New 'control knobs' for stem cells identified

Researchers at Tufts University have discovered that changes in membrane voltage control the timing of differentiation in adult human stem cells. The study found that hyperpolarization is a characteristic of differentiated cells and acts as an instructive signal to induce or inhibit differentiation.

SourceTufts University·JournalPLOS ONE·DateDec 3, 2008

New properties of skin stem cells

Scientists at Karolinska Institutet discovered skin stem cells can divide actively and transport themselves through skin tissue, contradicting previous assumptions. The study's findings also suggest a link between hedgehog signaling and the development of basal cell carcinoma, the most common form of skin cancer.

SourceKarolinska Institutet·JournalNature Genetics·DateOct 13, 2008

Stem cell regeneration repairs congenital heart defect

Researchers at Mayo Clinic have successfully used stem cells to regenerate heart tissue and repair dilated cardiomyopathy, a genetic defect. The treatment improved heart performance, synchronized electrical impulses, and halted deterioration in genetically altered mice with heritable dilated cardiomyopathy.

SourceMayo Clinic·JournalStem Cells·DateSep 11, 2008

New stem cell tools to aid drug development

Researchers at Durham University have developed two synthetic molecules that can direct stem cells to 'differentiate' into specific tissue types, improving the reliability of experiments and potentially reducing animal use. The new molecules, EC23 and EC19, are more stable than natural compounds currently used in laboratory research.

SourceDurham University·JournalOrganic & Biomolecular Chemistry·DateSep 2, 2008

Stem cells stand up for themselves

Research reveals that certain adult stem cells are more active than previously thought, actively controlling their behavior through the interaction between laminin A and integrins. This interaction enables follicle stem cells to remain in place, primed for division, by laying down laminin A to build their own niche.

SourceRockefeller University Press·JournalJournal of Cell Biology·DateAug 25, 2008

Standards in stem cell research

New research funded by the Economic and Social Research Council explores standards in stem cell research, balancing scientist autonomy with data comparability. The study suggests that standardizing practices could lead to automation technologies, but also raises concerns about exclusivity and robustness.

Purified stem cells restore muscle in mice with muscular dystrophy

Researchers have shown that purified stem cells isolated from adult skeletal muscle can restore healthy muscle and improve muscle function in mice with muscular dystrophy. The injected cells also replenished the pool of regenerative cells normally found in muscle, allowing the treated muscle to undergo subsequent rounds of injury repair.

SourceCell Press·JournalCell·DateJul 10, 2008

Gene directs stem cells to build the heart

Scientists at WashU Medicine have successfully directed mouse embryonic stem cells to build the heart using the Mesp1 gene, a crucial discovery that may lead to new therapies using human stem cells. The study found that Mesp1 regulates cardiovascular fate restriction and epithelial-mesenchymal transition in differentiating ES cells.

SourceWashU Medicine·JournalCell Stem Cell·DateJul 2, 2008