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Full-Text Articles in Molecular Biology

A Feedback Circuit Involving Let-7-Family Mirnas And Daf-12 Integrates Environmental Signals And Developmental Timing In Caenorhabditis Elegans, Christopher M. Hammell, Xantha Karp, Victor R. Ambros Nov 2009

A Feedback Circuit Involving Let-7-Family Mirnas And Daf-12 Integrates Environmental Signals And Developmental Timing In Caenorhabditis Elegans, Christopher M. Hammell, Xantha Karp, Victor R. Ambros

Program in Molecular Medicine Publications and Presentations

Animal development is remarkably robust; cell fates are specified with spatial and temporal precision despite physiological and environmental contingencies. Favorable conditions cause Caenorhabditis elegans to develop rapidly through four larval stages (L1-L4) to the reproductive adult. In unfavorable conditions, L2 larvae can enter the developmentally quiescent, stress-resistant dauer larva stage, enabling them to survive for prolonged periods before completing development. A specific progression of cell division and differentiation events occurs with fidelity during the larval stages, regardless of whether an animal undergoes continuous or dauer-interrupted development. The temporal patterning of developmental events is controlled by the heterochronic genes, whose products ...


Fshd Region Gene 1 (Frg1) Is Crucial For Angiogenesis Linking Frg1 To Facioscapulohumeral Muscular Dystrophy-Associated Vasculopathy, Ryan Wuebbles, Meredith L. Hanel, Peter L. Jones May 2009

Fshd Region Gene 1 (Frg1) Is Crucial For Angiogenesis Linking Frg1 To Facioscapulohumeral Muscular Dystrophy-Associated Vasculopathy, Ryan Wuebbles, Meredith L. Hanel, Peter L. Jones

Peter Jones Lab Publications

The genetic lesion that is diagnostic for facioscapulohumeral muscular dystrophy (FSHD) results in an epigenetic misregulation of gene expression, which ultimately leads to the disease pathology. FRG1 (FSHD region gene 1) is a leading candidate for a gene whose misexpression might lead to FSHD. Because FSHD pathology is most prominent in the musculature, most research and therapy efforts focus on muscle cells. Previously, using Xenopus development as a model, we showed that altering frg1 expression levels systemically leads to aberrant muscle development, illustrating the potential for aberrant FRG1 levels to disrupt the musculature. However, 50-75% of FSHD patients also exhibit ...


Transcriptional Regulation Differs In Affected Facioscapulohumeral Muscular Dystrophy Patients Compared To Asymptomatic Related Carriers, Patricia Arashiro, Iris Eisenberg, Alvin T. Kho, Antonia M. P. Cerqueira, Marta Canovas, Helga C. A. Silva, Rita C. M. Pavanello, Sergio Verjovski-Almeida, Louis M. Kunkel, Mayana Zatz Apr 2009

Transcriptional Regulation Differs In Affected Facioscapulohumeral Muscular Dystrophy Patients Compared To Asymptomatic Related Carriers, Patricia Arashiro, Iris Eisenberg, Alvin T. Kho, Antonia M. P. Cerqueira, Marta Canovas, Helga C. A. Silva, Rita C. M. Pavanello, Sergio Verjovski-Almeida, Louis M. Kunkel, Mayana Zatz

Wellstone Center for FSHD Publications

Facioscapulohumeral muscular dystrophy (FSHD) is a progressive muscle disorder that has been associated with a contraction of 3.3-kb repeats on chromosome 4q35. FSHD is characterized by a wide clinical inter- and intrafamilial variability, ranging from wheelchair-bound patients to asymptomatic carriers. Our study is unique in comparing the gene expression profiles from related affected, asymptomatic carrier, and control individuals. Our results suggest that the expression of genes on chromosome 4q is altered in affected and asymptomatic individuals. Remarkably, the changes seen in asymptomatic samples are largely in products of genes encoding several chemokines, whereas the changes seen in affected samples ...