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Illicit Drug Use Mapped Using Wastewater
A team of researchers has mapped patterns of illicit drug use across the state of Oregon using a method of sampling municipal wastewater before it is treated.
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What Is Skin Cancer? What Is Melanoma?
Melanoma is a malignant tumor of melanocytes. The tumors are generally found in the skin, but may also appear in the bowel and the eye (uveal melanoma). Melanoma is a type of skin cancer - one of the rarer types - but the cause of most skin cancer related deaths. Malignant melanoma is caused by an uncontrolled growth of skin pigment cells (melancytes). The word "melanoma" comes from the Ancient Greek melas meaning "black", and the Ancient Greek oma meaning "disease, morbidity".
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Nox(4)ious Requirement In Common Infant Tumor
Hemangiomas are the most common tumor of infancy. They are benign tumors derived from cells that line blood vessels (endothelial cells) and spontaneously regress as a child gets older. Jack Arbiser and colleagues, at Emory University School of Medicine, Atlanta, have now provided new insight into the molecules that control hemangioma growth and found that inhibiting a key molecule substantially inhibits hemangioma growth in a mouse model. Specifically, the protein Nox4 was found to be crucial for hemangioma growth in a mouse model and the drug fulvene 5 was found to be a potent in vitro inhibitor of Nox4 and to substantially inhibit in vivo hemangioma growth. The authors therefore suggest that targeting Nox4, potentially using fulvene derivatives, might provide a way to attenuate hemangioma growth.
Medical Devices

Protecting The Heart With Glucocorticoid Drugs

Glucocorticoids are steroid hormones that have numerous functions; for example, they regulate the response to stress and suppress inflammation. Synthetic glucocorticoids are used clinically in many situations, most famously to treat asthma, allergies, and autoimmunity. They have also been shown in animals and humans to help protect the heart from the damaging effects of heart attack, and this has been attributed to their anti-inflammatory effects. However, Motoaki Sano and colleagues, at Keio University School of Medicine, Japan, have now determined another mechanism by which glucocorticoids protect rodent hearts from the damaging effects of heart attack. Specifically, glucocorticoids, acting via the glucocorticoid receptor (GR), induced mouse and rat heart muscle cells to produce PGD2, and this was responsible for the ability of glucocorticoids to reduce damage to mouse hearts in both an ex vivo and an in vivo model of heart attack. The authors therefore suggest that GR-selective glucocorticoids might be more beneficial to humans following heart attack than glucocorticoids that activate both GR and the MR protein, activation of which occurs in response to stress and might have unwanted consequences. TITLE: Glucocorticoid protects rodent hearts from ischemia/reperfusion injury by activating lipocalin-type prostaglandin D synthase-derived PGD2 biosynthesis AUTHOR CONTACT: Motoaki Sano Keio University School of Medicine, Tokyo, Japan. View the PDF of this article at: https://www.the-jci.org/article.php?id=37413 Karen Honey Journal of Clinical Investigation


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