Recent in Biology (page 14 of 28)
Oct 28, 2011 | Elsa Jungman, Cécile Laugel and Arlette Baillet-Guffroy Faculty of Pharmacy, University Paris-Sud
In cosmetics, parabens are widely used due to their low cost and efficacy. In recent years, however, some reports have claimed that these materials exhibit estrogenic activity, which has led to attempts to replace them in formulations. This article reviews penetration studies of parabens spanning the past 20 years to determine whether they pose a risk to human health.
Oct 28, 2011 | Howard I. Maibach, MD, University of California School of Medicine; and Bahman Sotoodian, University of British Columbia
As is described here, moisturizers can influence the properties and structure of corneocytes by influencing the SC and consequently, the skin water barrier function. This hydrative influence of moisturizers could be beneficial as well as destructive toward skin barrier function.
Oct 26, 2011
Skin occlusion is a complex issue. Occlusion usually means the skin is covered directly or indirectly by impermeable films or substances, but certain topical vehicles that contain fats and/or polymer oils may also generate occlusive effects. They speed healing, but can also encourage the formation of bacteria. In the following excerpt, Zhai, MD, and Maibach, MD, review recent studies in various modes and methods of occlusion.
Oct 14, 2011
Researchers from the University of Cologne, Ghent University and the German Sport University Cologne have identified the protein that may stop necroptosis in keratinocytes, thereby preventing skin inflammation.
Oct 6, 2011
A collaboration of researchers have reported that use of antibacterial soaps does not lead to antibiotic or antibacterial resistance.
Oct 5, 2011
Contact allergic dermatitis is a common, and some say pervasive public health problem. The degree to which fragrances and fragranced products contribute to this issue is investigated in a two-part overview by Howard Maibach, MD, and Jurij Hostýnek, PhD, from which the following is excerpted.
Sep 20, 2011 | Anthony J. O'Lenick Jr., Siltech LLC; and Kelly Dobos, Kao Corp.
Here, industry expert Tony O'Lenick asks Kelly Dobos to explain the difference between keratinocytes and corneocytes. Many skin care products target either keratinocytes or corneocytes; therefore, understanding their differences and the basic structure of human skin is important for formulators.
Sep 1, 2011
Researchers at Rutgers have suggested that topical caffeine may help lower the risk of UV-induced skin cancer.
Aug 31, 2011
Occlusion bears both positive and negative effects on the health and integrity of skin. In the following excerpt, Hongbo Zhai, MD, and Howard Maibach, MD, introduce a discussion of the effects of occlusion on skin.
Aug 16, 2011
Researchers at the University of Illinois have confirmed the presence of bacteria associated with early childhood caries (ECC) in infant saliva. The research, which was published in PLoS One in the article “Comparative analysis of salivary bacterial microbiome diversity in edentulous infants and their mothers or primary care givers using pyrosequencing” proposes the need for infant oral care.
Jul 13, 2011
Following is an excerpt adapted from Physiology of the Skin, Third Edition, which explores the process of keratinization.
Jun 30, 2011 | Howard I. Maibach, MD, University of California School of Medicine; Ali Alikhan, MD, Mayo Clinic; and Fatima S. Alikhan, Columbia University
Keratolysis is the separation or loosening of the stratum corneum (SC), and is part of the natural cycle of skin renewal and regeneration. Disordered keratolysis, resulting in skin overgrowth or excessive desquamation, is responsible for various skin disorders.