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J Biosci
2017 Jun 01;422:345-353. doi: 10.1007/s12038-017-9681-x.
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Current status and future prospect of FSHD region gene 1.
Hansda AK
,
Tiwari A
,
Dixit M
.
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FSHD region gene 1 (FRG1), as the name suggests, is the primary candidate gene for fascioscapulohumeral muscular dystrophy disease. It seemingly affects muscle physiology in normal individuals but in FSHD, where it is found to be highly upregulated, might be involved in disruption of face, scapula and humeral skeletal muscle. Literature on FRG1, reviewed from 1996 to 2016, reveals that it is primarily associated with muscle development and maintenance. Approximately 75% of FSHD patients also show vascular abnormalities indicating that FRG1 might have some part to play in these abnormalities. Research involving vasculature in X. laevis larvae shows that FRG1 positively affects normal vasculature. Few of the well-established angiogenic regulators seem to get affected by abnormal expression level of FRG1. Its primary localization in sub nuclear structures like Cajal bodies and nuclear speckles indicates regulation of the above-mentioned factors by transcriptional and post-transcriptional machineries, but in-depth studies need to be done to conclude a clear statement. In this review, we have attempted to present all the work done on FRG1, all the lacunas which need to be unraveled, and hypothesized a model for our readers to get an insight into its molecular mechanism.
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