November 28, 2011

Popular Myth Debunked

1 Men Don’t Think About Sex All Day, Says Study

Men don’t think about sex all day long, finds an Ohio State U study that will appear in the January issue of the Journal of Sex Research. For the study of 163 females and 120 males, participants carried a golf tally counter for a week to track their thoughts about eating, sex and sleep. Each person tracked one type of thought; 59 tracked thoughts of eating, 61 tracked sleep and 163 tracked thoughts of sex. Participants also answered a survey about sleeping and eating habits as well as their attitudes towards sex. The study found that, regardless of gender, those who are more comfortable with their sexuality, think about sex more often. "There's really no good reason that our society should have believed that men are thinking so much more about sex than women,” say researchers.

More at Eurekalert.org | Posted 6 years ago by Melody Lesser

Previously: Men Ages 75 to 90 Still Want Sex

Tags: Ohio State University, Sex, Men and Sex, Women and Sex, Sexual Thoughts

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Using Head Could Hurt

2 Heading in Soccer May Lead to Brain Injury

Soccer players who frequently head the ball may have brain abnormalities similar to patients with traumatic brain injury, suggest researchers who used diffusion tensor imaging (DTI) to study the effects of heading in soccer. Researchers utilized DTI, an advanced magnetic resonance technique, to study 32 amateur soccer players. Fielding the ball with the head, heading, is a big part of soccer and training drills for the sport. While heading doesn't produce enough impact to lacerate nerve fibers in the brain, researchers caution that repetitive heading could lead to a "cascade of responses" that result in degeneration of brain cells. The findings were presented at the annual meeting of the Radiological Society of North America (RSNA).

More at Eurekalert | Posted 6 years ago by Peggy Rowland

Previously: Antidepressants May Assist Brain Injury Healing

Tags: Soccer Injuries, Brain Injuries Soccer, Causes Traumatic Brain Injury, Risks Soccer, Radiological Society of North America Brain Injury Research, Diffusion Tensor Imaging

Comment on This | Was this Interesting? Yes! (43%) / No! (57%)

Blocks Cytokines Effects

3 Some T Cells Help Regenerate Stem Cells

A new study from the Center of Craniofacial Molecular Biology at the Ostrow School of Dentistry of University of Southern California has found that regulatory T cells ability to decrease the levels of the cytokines interferon (INF)-gamma and tumor necrosis factor (TNF)-alpha helped mice with bone defects to lay down new bone faster through bone marrow mesenchymal stem cells (BMMSC)-mediated bone regeneration and aspirin sped the process up. Most of the time, infection-fighting T cells secrete these cytokines which target and destroy stem cells and inhibit bone production. Now that the role of T-cells in tissue regeneration has been shown, researchers in the field of tissue regeneration are going to have to take into account the immune system’s role.

More at Science Daily | Posted 6 years ago by Kristie Hayes

Previously: Cultured T Cells Reduce Transplant Rejection

Tags: Bone Growth, Regulatory T Cells, Stem Cells, Bone Marrow Mesenchymal Stem Cells Mediated Bone Regeneration, Tissue Regeneration and the Immune System, Center of Craniofacial Molecular Biology at the Ostrow School of

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Not a Fountain of Youth

4 Immune Stem Cells Age, Affects Health

Researchers at the Stanford University School of Medicine have discovered that as people age, their hematopoietic stem cells (HSC) could not differentiate into B lymphocytes as well and typically became myeloid cells by comparing HSC from 15 elderly people and 28 younger people, all of whom were healthy. The bone marrow of mice that received HSCs from human donors had more myeloid cells compared to lymphoid cells. Genes related to age that played a role in the cell cycle, growth, division, DNA repair and death of cells were upregulated which means that do not enter the cell cycle at the correct time. This may result in an elderly person’s immune system not being fully functional and explain why blood cancers such as acute myeloid leukemia are more prevalent in this age group.

More at Science Daily | Posted 6 years ago by Kristie Hayes

Previously: Cultured RBCs from Stem Cells Live in Patient

Tags: Acute Myeloid Leukemia, Hematopoietic Stem Cells, HSCs, Stanford University School of Medicine, Aging Stem Cells, Immune System in the Elderly, Lymphoid Cells, Myeloid Cells, B Lymphocytes

Comment on This | Was this Interesting? Yes! (49%) / No! (51%)

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