Alternative Ribonucleic Acid Processing in Endocrine Systems
Hua Lou1 and
Robert F. Gagel2
Department of Genetics and the Ireland Cancer Center (H.L.), Case
Western Reserve University, School of Medicine and University Hospitals
of Cleveland, Cleveland, Ohio 44106-4955; and Department of Medical
Specialties (R.F.G.), Section of Endocrine Neoplasia and Hormone
Disorders, University of Texas M.D. Anderson Cancer Center, Houston,
Texas 77030
Alternative RNA processing is a mechanism for creation of protein
diversitythrough selective inclusion or exclusion of RNA sequence
duringposttranscriptional processing. More than one-third of human
pre-mRNAsundergo alternative RNA processing modification, making this
aubiquitous biological process. The protein isoforms producedhave
distinct and sometimes opposite functions, underscoringthe importance
of this process. This review focuses on importantendocrine genes
regulated by alternative RNA processing. Wediscuss how diverse events
such as spermatogenesis or GH actionare regulated by this process. We
focus on several endocrine(calcitonin/calcitonin gene-related peptide)
and nonendocrine(Drosophila doublesex and P-element and
mouse c-src) examplesto highlight recent progress in
the elucidation of molecularmechanisms regulating this process.
Finally, we outline methods(model systems and techniques) used by
investigators in thisfield to study processing of individual
pre-mRNAs.
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