Nutrient Deficiency-Related Dermatoses after Bariatric Surgery.

GENERAL PURPOSE: To provide information on obesity, bariatric surgery, and the nutrient deficiency-related dermatoses that may result from these surgeries. TARGET AUDIENCE: This continuing education activity is intended for physicians, physician assistants, NPs, and nurses with an interest in skin and wound care. LEARNING OBJECTIVES/OUTCOMES: After participating in this educational activity, the participant should be better able to:1. Examine issues related to obesity and bariatric surgery.2. Identify the sources and role of specific nutrients.3. Recognize the clinical signs and symptoms of nutrient deficiency following bariatric surgery. ABSTRACT: Obesity is a global epidemic that increases the risk of weight-related comorbidities in modern society. It is complex, multifactorial, and largely preventable. Noninvasive treatments for obesity include diet, exercise, and medication. However, bariatric surgeries are becoming popular procedures for those who do not achieve success with noninvasive weight management treatment. Bariatric surgeries often result in dietary restriction and/or malabsorption, which lead to drastic weight loss. Individuals who had bariatric surgeries need lifelong follow-up and monitoring to ensure adequate intake of nutrients. Nutrient deficiencies can ensue when long-term vitamin and mineral supplementation is not followed. Severe nutrient deficiencies may lead to dermatoses that can be corrected by nutrient repletion and careful monitoring. A case report of nutrient deficiency-related dermatoses is followed by a review of obesity and its treatments with a focus on bariatric surgeries.

Anti-breast cancer effects of histone deacetylase inhibitors and calpain inhibitor.

Development of new breast cancer therapies is needed, particularly as cells become refractory or develop increased drug resistance. In an effort to develop such treatments, class I and II histone deacetylases (HDACs), alone and in combination with other cytotoxic agents, are currently in clinical trial. Herein, we discuss the effects of histone deacetylase inhibitors (HDACi) when used in combination with calpeptin, an inhibitor of the regulatory protease, calpain. We present results of study in two breast cancer cells lines with distinct characteristics: MDA-MB-231 and MCF-7. When used in combination with calpeptin, two chemically distinct HDACi significantly inhibited growth and increased cell death by inducing cell-cycle arrest and apoptosis. MCF-7 cells exhibited a greater proportion of arrest at the G(1) phase, whereas triple-negative MDA-MB-231 cells exhibited increased cell cycle arrest at the S phase. Methylation of the imprinted and silenced proapoptoic tumor suppressor gene aplasia Ras homolog member I (ARHI) was reduced in both cell lines after treatment with HDACi. However, it was only re-expressed on such treatment in MDA-MB-231 cells, suggesting that re-expression operates under differential mechanisms in these two cell lines. Collectively, these results showed that the combination of HDACi and calpeptin inhibited the growth of two distinctly different types of breast cancer cells and could have wide clinical applications, though the mechanisms of inhibition are possibly different.