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排序方式: 共有653条查询结果,搜索用时 15 毫秒
651.
Yvonne Will Rhonda S Kaetzel Marda K Brown Tamara S Fraley Donald J Reed 《Archives of biochemistry and biophysics》2002,397(2):399-406
Cellular glutathione is released during apoptosis and may play a role in the regulation of the mitochondrial permeability transition pore. The question of whether only cytosolic glutathione is important in apoptosis, or whether mitochondrial glutathione also plays a role, was investigated using gamma-glutamyltranspeptidase-deficient knockout mice. Thymocytes from these mice were found to have both glutathione pools diminished and they were more susceptible to dexamethasone (DEX)-induced apoptosis. Supplementation with N-acetylcysteine (NAC) and L-2-oxothiazolidine-4-carboxylic acid replenished both glutathione pools and provided protection from apoptosis. Ascorbate supplementation was beneficial to the mitochondrial glutathione pool, but apoptosis was not prevented. NAC supplementation caused an increase in reactive oxygen species formation and cardiolipin oxidation, but had no adverse affect on the amount of apoptotic cells. Our results suggest that the glutathione status is an important factor in apoptosis and indirect evidence indicates that the cytosolic pool of glutathione may be important in DEX-induced apoptosis, with mitochondrial events being secondary, and may reflect the execution phase. 相似文献
652.
The Wald-Wolfowitz test and the Kolmogorov-Smirnov test are two well-known tests which can be used to test for differences between two population distributions, where these distributions could differ in means, variances or shapes. This paper compares the simulated power of the Wald-Wolfowitz test to that of the Kolmogorov-Smirnov test in several situations. Differences in location only, differences in variance only, and differences in both location and variance are considered. In most cases, equal sample sizes of 10 and 20 are used. 相似文献
653.
Joan E. Pellegrino Rhonda E. Schnur Leslie Boghosian-Sell Gordon Strathdee Joan Overhauser Nancy B. Spinner Tammy Stump Kimberly Grace Elaine H. Zackai 《Human genetics》1996,97(4):532-536
The ablepharon-macrostomia (AMS) and Barber-Say syndromes (BSS) are rare disorders characterized by absence of the eyelids
or ectropion, macrostomia, ambiguous genitalia, abnormal ears, rudimentary nipples, and dry, redundant skin. Patients with
Barber-Say syndrome also have hypertrichosis. We present a patient with a phenotype similar to AMS who has a complex rearrangement
of chromosome 18, involving both an inversion and interstitial deletion. Our patient lacks the typical features of the 18q
deletion syndrome. We review AMS and BSS as compared with our patient, and recognize cutis laxa as a feature shared by all.
We propose that the gene(s) for this phenotype may lie on chromosome 18 in the region of the deletion or inversion breakpoints.
Received: 1 March 1995 / Revised: 20 May 1995 相似文献