Satellite DNA-containing gigantic introns in a unique gene expression program during Drosophila spermatogenesis

by Jaclyn M. Fingerhut, Jessica V. Moran, Yukiko M. Yamashita Intron gigantism, where genes contain megabase-sized introns, is observed across species, yet little is known about its purpose or regulation. Here we identify a unique gene expression program utilized for the proper expression of genes with intron gigantism. We find that twoDrosophila genes with intron gigantism,kl-3 andkl-5, are transcribed in a spatiotemporal manner over the course of spermatocyte differentiation, which spans ~90 hours. The introns of these genes contain megabases of simple satellite DNA repeats that comprise over 99% of the gene loci, and these satellite-DNA containing introns are transcribed. We identify two RNA-binding proteins that specifically localize tokl-3 andkl-5 transcripts and are needed for the successful transcription or processing of these genes. We propose that genes with intron gigantism require a unique gene expression program, which may serve as a platform to regulate gene expression during cellular differentiation.
Source: PLoS Genetics - Category: Genetics & Stem Cells Authors: Source Type: research

Related Links:

AbstractPurposeThe increased life expectancy in the general population is causing rapid growth of the number of elderly patients. Pituitary adenomas (PAs) are one of those tumors whose incidence increases with age. Pituitary surgery in elderly has usually been considered riskier than in the younger population. The aim of this study was to evaluate the surgical outcome of a large series of patients who underwent transsphenoidal surgery for PAs.MethodsWe retrospectively reviewed a series of patients who underwent transsphenoidal surgery for PAs in our institution. Inclusion criteria were: 65 years of age or more, and no prev...
Source: Endocrine - Category: Endocrinology Source Type: research
Authors: Hozumi K, Fukuoka H, Odake Y, Takeuchi T, Uehara T, Sato T, Inoshita N, Yoshida K, Matsumoto R, Bando H, Hirota Y, Iguchi G, Taniguchi M, Otsuki N, Nishigori C, Kosaki K, Hasegawa T, Ogawa W, Takahashi Y Abstract Although acromegaly has been reported in patients with Neurofibromatosis type 1 (NF1), these cases have not been associated with growth hormone (GH)-producing somatotroph adenoma, but with optic pathway glioma. A 68 year-old Japanese woman, who had been clinically diagnosed with NF1, was referred to our hospital due to a thyroid tumor and hypercalcemia. Acromegaly was suspected due to her facial f...
Source: Endocrine Journal - Category: Endocrinology Tags: Endocr J Source Type: research
This article discusses the diagnosis and treatment of patients with prolactinomas, acromegaly, Cushing disease, and other pituitary tumors during pregnancy.
Source: Endocrinology and Metabolism Clinics of North America - Category: Endocrinology Authors: Source Type: research
In this study, we evaluated the course of DTC in 14 acromegalic patients retrospectively. Fourteen papillary thyroid cancer patients without acromegaly, who were matched with the acromegalic patient group for age, gender and properties of thyroid cancer, were investigated as the control group. We identified no change in the course and treatment responses of DTC in association with the acromegaly activity, gender, age and disease duration, and all patients were found to be in remission for DTC at the time of investigation. Retrospective analysis of this cohort suggests that the activity of acromegaly may not affect the trea...
Source: Experimental and Clinical Endocrinology and Diabetes - Category: Endocrinology Authors: Tags: Article Source Type: research
Wenhua Feng Pasireotide is a multi-receptor ligand somatostatin analogue approved for medical treatment of Cushing’s disease and acromegaly. The liquid-phase total synthesis of pasireotide-a 18-membered cyclic hexapeptide-was achieved by the 3 + 2 + 1 strategy, and the Pro1-Phe6 peptide bond was selected as the final cyclization position. Two key fragments were simply synthesized using N,O-bis(trimethylsilyl)acetamide/N-hydroxysuccinimide ester (BSA/NHS) as coupling agents, and processes of the two key fragments were simple without any chromatographic purification. The current synthesis method is easily sca...
Source: Molecules - Category: Chemistry Authors: Tags: Article Source Type: research
Resumen: La acromegalia es una enfermedad caracterizada por una desfiguraci ón somática de progresión lenta causada por la sobreproducción de hormona de crecimiento (GH) y factor de crecimiento insulinoide tipo 1 (IGF-1), predominantemente asociada con un adenoma hipofisario. La manifestación más evidente a nivel facial es un prognatismo mandibular por exceso de creci miento de la mandíbula. El propósito del presente trabajo fue realizar una comparación morfológica craneofacial mediante análisis cefalométrico y superposición cefalom&...
Source: Odontoestomatologia - Category: Dentistry Source Type: research
Condition:   Acromegaly Interventions:   Drug: IONIS GHR-LRx;   Drug: SRL Sponsor:   Ionis Pharmaceuticals, Inc. Not yet recruiting
Source: ClinicalTrials.gov - Category: Research Source Type: clinical trials
ConclusionOur analysis suggested that not only hormone control but also therapeutic regimens and presence of co-morbidities might affect QOL of patients with acromegaly in some dimensions.
Source: Journal of the Formosan Medical Association - Category: General Medicine Source Type: research
CONCLUSION: Our analysis suggested that not only hormone control but also therapeutic regimens and presence of co-morbidities might affect QOL of patients with acromegaly in some dimensions. PMID: 31147197 [PubMed - as supplied by publisher]
Source: J Formos Med Assoc - Category: General Medicine Authors: Tags: J Formos Med Assoc Source Type: research
Abstract TheWunderkammer of Schloss Ambras in Innsbruck was one of the first cabinets of curiosities, created in the sixteenth century. Among the many curiosities, the cabinet includes an anonymous Renaissance painting called “Der Riese Hans Kraus” (The giant Hans Kraus). The details suggest us that it could be a representation of an individual affected by acromegaly.
Source: Journal of Endocrinological Investigation - Category: Endocrinology Source Type: research
More News: Acromegaly | Genetics