Expression and chromosomal organization of mouse meiotic genes.

Microarray technology which enables large scale analysis of gene expression and thus comparison between transcriptomes of different cell types, cells undergoing different treatments or cells at different developmental stages has also been used to study the transcriptome involved with spermatogenesis. Many new germ cell-specific genes were determined, and the resulting genes were classified according to different criteria. However, the biological significance of these classifications and their clustering according to developmental transcriptional patterns during spermatogenesis have not yet been addressed.

Exercise training alters the molecular response to myocardial infarction.

Purpose: We and others have shown that swimming exercise training performed before irreversible coronary occlusion improves the outcome of the heart injury and alters gene expression at the remodeling phase. The purpose of the current study was to identify temporal changes in the molecular response to myocardial infraction of prior exercise trained rats during the acute, the subacute, and the chronic phases postinfarction.

Methods: Rats underwent a 7-wk swimming or sedentary protocol and were subjected to surgical induction of acute myocardial infarction (MI).

Effects of aerobic training on gene expression in skeletal muscle of elderly men.

Purpose: To analyze the effect of 3 months of training on global gene expression in skeletal muscle of healthy elderly men in order to better characterize the pathways that differentiate the trained from the sedentary state.

Methods: Needle biopsies were obtained from the vastus lateralis of six healthy, sedentary, 68.0 +/- 2.

Neuroprotection by NGF in the PC12 in vitro OGD model: involvement of mitogen-activated protein kinases and gene expression.

Neurodegenerative disorders and chronic disability due to stroke in the brain or spinal cord afflict a large sector of the population. To investigate the mechanism involved in ischemic stroke and to develop neuroprotective drugs/therapies, in vivo and in vitro, pharmacological models are needed. To investigate the cellular and molecular neuroprotective mechanisms of nerve growth factor (NGF), a member of the nervous system neurotrophin family of growth factors, under ischemia, we used an oxygen-glucose-deprivation (OGD) device and pheochromocytoma PC12 cells exposed to a paradigm of ischemic insult.

Gene expression profiling of in vivo UVB-irradiated human epidermis.

Background: Several recent studies have employed microarray profiling to study UVB-regulated gene expression in human skin. These studies are all based on UV-irradiated cultured cells that differ substantially from the intact tissues they are supposed to imitate. The purpose of the present study was to analyze the differential expression of UVB-regulated genes in intact human epidermis following in vivo UV irradiation.

Sil overexpression in lung cancer characterizes tumors with increased mitotic activity.

Sil (SCL interrupting locus) was cloned from the most common chromosomal rearrangement in T-cell acute lymphoblastic leukemia. It is an immediate early gene whose expression is associated with cell proliferation. Sil protein levels are tightly regulated during the cell cycle, reaching peak levels in mitosis and disappearing on transition to G1.