Recent in Biology (page 11 of 28)
Mar 5, 2013 | Howard I. Maibach, MD, University of California School of Medicine; Robert Stern, MD, Touro College of Osteopathic Medicine
HA is critically important to dermatologists and to cosmetic scientists, as it maintains the moisture in skin, and loss of accessible HA results in wrinkling and changes associated with aging. Replacement of such HA is the goal of many cosmetic and cosmeceutical techniques and reagents.
Feb 19, 2013
In a collaboration with researchers at Charité University Medicine Berlin, Beiersdorf scientists were able to demonstrate the existence of an inner clock in human skin cells, which controls skin regeneration among other things.
Feb 1, 2013 | Ada Polla, Alchimie Forever
The penetration routes of substances through the stratum corneum and how these transport pathways function are becoming better understood. Despite this progress, however, the penetration mechanisms of cosmetic formulations remain mysterious. This overview presents current knowledge on the various pathways of penetration, and suggests that even if cosmetic formulations penetrate no deeper than the surface, their efficacy may still be optimal.
Feb 1, 2013 | Howard I. Maibach, MD, University of California San Francisco; and Sonia Lamel, MD, University of Miami
By comparing response rates of placebo versus active drug groups in psoriasis RCTs evaluating biologic agents, the authors of this column sought to clarify factors contributing to placebo responses and their implications in improving clinical trial design to determine more accurate drug efficacies.
Jan 4, 2013 | Hongbo Zhai, MD, and Howard I. Maibach, MD, University of California San Franciso; and Heidi P. Chan, MD
While scalp irritation also can be caused by contact with physical or biological agents, this column will discuss the irritation resulting from hair chemicals. The desire for a specific hairstyle or color can render the scalp exposed to different hair chemicals that may result to scalp irritation.
Dec 7, 2012
Researchers from the University of Michigan, Ann Arbor have reported that eccrine sweat glands may play a role in wound healing. The researchers believe this understanding could lead to improved wound treatments.
Dec 4, 2012 | Katie Anderson, Cosmetics & Toiletries magazine
Sea cucumbers, considered a delicacy in East and Southeast Asia, may not be pleasing to the eye but could be pleasing to the complexion. These slippery creatures belong to the animal group of echinoderms, which possess an adaptive feature called mutable connective tissue. While investigating this phenomenon, Maurice Elphick, PhD, and his research team from Queen Mary University of London’s School of Biological and Chemical Sciences not only identified the genes that encode the peptides to make this tissue stiffen and soften, but also have hypothesized that one of these peptides may be used in anti-aging skin care
Dec 4, 2012 | Nava P. Greenfield, Yale School of Medicine; and Howard I. Maibach, MD, University of California San Francisco
Despite their widespread use and applications, the scientific literature on moisturizers lacks strong evidence to support dermatological use. This article explores current literature on the efficacy of moisturizers to help the industry understand their mechanisms and role in treatment.
Nov 1, 2012 | M Estanqueiro (MD), G Bossolani, MH Amaral (PhD), J Conceição, D.Santos (PhD) and JM Sousa Lobo (PhD), University of Porto; and JB Silva (PhD) and CSF Gomes (PhD), University of Aveiro
Pumice has a recognized application as an abrasive agent to promote exfoliation of the skin. In this study, different particle size fractions of pumice sampled from several geologic occurrences in São Miguel’s island, the Azores archipelago, were used in the preparation of exfoliation formulations. Gels and soap were prepared and characterized, and their efficacy evaluated.
Oct 1, 2012 | Katie Anderson
Scientists at the Università Politecnica delle Marche, The University of Barcelona, the University of Salamanca and the University of Granada have produced an extract of strawberry to quantify the ability of the fruit to protect the skin.
Oct 1, 2012 | Kaley Myer, New York University School of Medicine; and Howard I. Maibach, MD, University of California School of Medicine
Skin care products containing amino acids often promote the benefits conferred on the skin by these molecules. Natural amino acids found in the skin have been found to improve the health of skin through antioxidation, membrane stabilization and increasing skin’s natural moisturizing factor (NMF).
Sep 11, 2012 | Anthony J. O'Lenick Jr., Siltech LLC, and Kelly Dobos, Kao Corp.
Tony O’Lenick asks industry expert Kelly Dobos to explain the difference between Gram-negative and Gram-positive bacteria to understand the importance of selecting the proper preservative system for a cosmetic.