ABSTRACT
Type 2 diabetes mellitus (T2D) is a health problem worldwide, and is associated with serious health consequences. The development of T2D has a strong association with obesity, sedentary lifestyle, genetic factors and other associations of diabetes. Faced with this problem, bariatric surgery has evolved as the treatment that produced a greater decrease in body weight in the long term, unlike the medical treatment. Moreover, it is postulated that bariatric surgery currently may have a beneficial effect in improving the treatment or even diabetes remission in obese patients. (AU)
Subject(s)
Humans , Male , Female , Diabetes Mellitus, Type 2/surgery , Bariatric Surgery/methods , Diabetes Mellitus, Type 2/etiology , Diabetes Mellitus, Type 2/physiopathology , Obesity/surgeryABSTRACT
El pioderma gangrenoso es una rara enfermedad inflamatoria que se caracteriza por una necrosis dolorosa de la piel que no cuenta con un tratamiento gold standard. Generalmente se asocia a enfermedades sistémicas, pero también se puede presentar después de procedimientos quirúrgicos. El diagnóstico es por exclusión, por esta razón es importante el estudio de enfermedades sistémicas e infecciones de la piel. El pioderma gangrenoso de la mama es un fenómeno poco frecuente, sólo se han reportado algunos casos. A continuación presentamos un caso de pioderma gangrenoso de la mama post reducción mamaria.
Pyoderma gangrenosum is a rare inflammatory disease characterized by a painful skin necrosis, and does not have a gold standard treatment. Usually associated with systemic diseases, may occur after surgical procedures. Diagnosis is made by exclusion, therefore it is important to rule out systemic diseases and infections of the skin. Pyoderma gangrenosum of the breast is a rare phenomenon, only few cases have been reported. We present a case of pyoderma gangrenosum of the breast post breast reduction.
Subject(s)
Humans , Female , Young Adult , Breast Diseases/etiology , Breast Diseases/drug therapy , Mammaplasty/adverse effects , Pyoderma Gangrenosum/etiology , Pyoderma Gangrenosum/drug therapyABSTRACT
Los micosis superficiales corresponden o las afecciones de piel, pelos, uñas y mucosas por diversos especies de hongos. Sus principales agentes etiológicos corresponden a dermatofitos, levaduras del género Candiada y Malassezia sp. El objetivo de nuestro trabajo fue caracterizar y analizar las dermatomicosis superficiales según género, poro lo cual se realizó un estudio retrospectivo durante el periodo comprendido entre enero de 1999 y diciembre de 2006 en el Laboratorio de Dermatología del Hospital Clínico de la Universidad de Chile. En el período observado se analizaron 30.590 registros de pacientes. El porcentaje de resultados positivos fue menor en mujeres que en hombres, tanto para micológicos (56% vs 66%, P < 0,00 1) como para cultivos (32% vs 39%, P < 0,00 1). Se observó que las mujeres tuvieron significativamente más presencia de levaduras en el examen micológico directo, desarrollo de Candida sp en el cultivo y mayor afectación de uñas de manos que los hombres.
Superficial mycosis (SM) includes various fungi species that affect skin, hair, nails and mucous membranes. The main a etiologic agents are dermatophytes, and Candida and Malassezia sp, yeasts. The aim of this study is to characterize SM and analyze its relation with gender. A retrospective study was realized in the Laboratory of Dermatology, University of Chile Clinical Hospital, between January 1999 and December 2006. 30,590 patient charts were reviewed. Women showed o lower percentage of positive results thon men in direct microscopic tests (56% vs, 66%, P < 0,00 1) and culture tests (32% vs, 39%, P < 0,00 1). Women had significantly higher yeast counts in direct microscopic tests, higher frequency of Candida sp. in cultures, and greater involvement of finger nails than men.
Subject(s)
Humans , Male , Adolescent , Adult , Female , Infant, Newborn , Infant , Child, Preschool , Child , Middle Aged , Aged, 80 and over , Dermatomycoses/epidemiology , Fungi/isolation & purification , Culture Techniques , Candida/isolation & purification , Chile/epidemiology , Dermatomycoses/diagnosis , Dermatomycoses/microbiology , Microsporum/isolation & purification , Retrospective Studies , Sex Factors , Trichophyton/isolation & purificationABSTRACT
The corrosion resistance of AISI 304 stainless steel (AISI 304 SS) and manganese stainless steel (low-nickel SS) brackets in artificial saliva was investigated. The cytotoxic effects of their corrosion products on L929 cell culture were compared by two assays, crystal violet, to evaluate cell viability, and MTT (3-[4,5-dimethylthiazol-2-yl]2,5-diphenyltetrazolium bromide), for cell metabolism and proliferation. The atomic absorption spectroscopic analysis of the corrosion products demonstrated that nickel and manganese ion concentrations were higher for the AISI 304 SS-bracket immersion solution as compared with the low-nickel SS brackets. Scanning electron microscopy and energy-dispersive spectroscopy demonstrated less corrosion resistance for the AISI 304 SS brackets. Although none of the bracket extracts altered L929 cell viability or morphology, the AISI 304 SS-bracket extracts decreased cellular metabolism slightly. The results indicated that the low-nickel SS presents better in vitro biocompatibility than AISI 304 SS brackets. Abbreviations used: AISI, American Iron and Steel Institute; EDS, energy-dispersive spectroscopy; OD, optical density; ISO, International Organization for Standardization; MTT, (3-{4,5 dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide; NiSO(4), nickel sulfate; SEM, standard error of the mean; WHO, World Health Organization; and TNF, tumor necrosis factor.
Subject(s)
Fibroblasts/drug effects , Orthodontic Brackets/adverse effects , Stainless Steel/toxicity , Analysis of Variance , Animals , Cell Proliferation/drug effects , Cell Survival/drug effects , Corrosion , Electron Probe Microanalysis , L Cells , Manganese/analysis , Mice , Nickel/analysis , Stainless Steel/chemistry , Statistics, NonparametricABSTRACT
Leaves of tea (Camellia sinensis L.) contain extraordinary large amounts of (-)-epigallocatechin, (-)-epicatechin, (+)-gallocatechin, and (+)-catechin and derivatives of these compounds that show positive effects on human health. The health-promoting effects of flavan 3-ols, especially those of green tea, are of scientific and public interest. Furthermore, they play a crucial role in defense against pathogens of tea. Therefore, biosynthesis of these flavonoid compounds was investigated. The anthocyanidin reductase enzyme recently described from Arabidopsis and Medicago was shown to be present in tea with very high activity and produces epicatechin as well as epigallocatechin from the respective anthocyanidins, thus explaining the very high contents of these compounds. A strong combined dihydroflavonol 4-reductase/leucoanthocyanidin 4-reductase activity was demonstrated and catalyzes the key steps in catechin and gallocatechin formation. Together with the enzyme activities and substrate specificities of the preceding enzymatic reactions, the biosynthesis of the most prominent flavonoids of tea is elucidated.
Subject(s)
Camellia sinensis/metabolism , Catechin/metabolism , Flavonoids/biosynthesis , Acyltransferases/metabolism , Alcohol Oxidoreductases/metabolism , Anthocyanins/metabolism , Camellia sinensis/enzymology , Cytochrome P-450 Enzyme System/metabolism , Intramolecular Lyases/metabolism , Mixed Function Oxygenases/metabolism , Molecular Sequence DataABSTRACT
The thiol group is one of the few groups NOT tolerated by the Suzuki reaction. Therefore, a new protective group, the 2-methoxyisobutyryl group, was developed by tuning the electronic/steric properties of the acyl residue. Other thioesters, such as thioacetate, result in a more or less dominant side reaction, which to date has not been described: sulfur-assisted acylation of boronic acids. The reaction pathway for this new reaction is discussed.
