Publications by authors named "Bellaiche J"

Introduction: Implantation of penile prosthesis is constantly growing but little long-term data is available concerning the associated factors of prosthesis survival. Our aim was to describe the long-term survival of penile prostheses and to identify factors influencing long-term prosthesis survival.

Methods: This is a retrospective, monocentric cohort of patients who underwent their first implantation of a penile prosthesis, between May 2000 and March 2017, at the Reims University Hospital.

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The present study aimed to investigate whether the Gfra1/Gdnf and/or Kit/Kitlg regulatory pathways could be involved in the regulation of spermatogonial cell proliferation and/or differentiation in fish. Homologs of the mammalian gfra1, gdnf, kitr, and kitlg genes were identified in gnathostomes and reliable orthologous relationships were established using phylogenetic reconstructions and analyses of syntenic chromosomal fragments. Gene duplications and losses occurred specifically in teleost fish and members of the Salmoninae family including rainbow trout (Oncorhynchus mykiss) and Atlantic salmon (Salmo salar).

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Article Synopsis
  • Nanos proteins are essential for germ cell development and have undergone various duplications and losses, particularly the nanos1 gene in different vertebrate lineages.
  • In chondrichthyans, two nanos1 genes (nanos1A and nanos1B) exist, while teleosts have lost nanos1A and duplicated nanos1B, resulting in two versions (nanos1Ba and nanos1Bb).
  • The study reveals distinct expression patterns of nanos1A and nanos1B in dogfish, with nanos1A mainly in the brain and testis, while nanos1B is primarily in the germinative zone of the testis, suggesting divergent roles in vertebrate reproduction.
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Purpose Of The Study: The presence of midline sub-umbilical and/or suprapubic scar can sometimes hinder breast reconstruction using deep inferior epigastric perforator (DIEP) procedure.

Basic Procedures: We report the use of indocyanine green injection in a 60-year-old woman in the context of deep inferior epigastric perforator (DIEP) procedure for unilateral breast reconstruction (bilateral breast cancer) with abdominal scar (midline sub-umbilical scar and Pfannenstiel incision scar).

Most Important Findings: This technique underlines the importance of neoangiogenesis mechanisms and helped simplify the surgical gesture initially planned (in order to ensure volume in spite of the scars as a DIEP procedure with double anastomoses was initially planned).

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Background And Purpose: Facial asymmetries to the tears are rare. We report a pediatric original case that may fall within the framework of a Cayler syndrome. Through its clinical presentation, we will discuss differential diagnoses, associated forms, its etiology, and its management.

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What makes the spermatogonial stem cells (SSCs) self-renew or differentiate to produce spermatozoa is barely understood, in particular in nonmammalian species. Our research explores possible regulations of the SSC niche in teleost, locally by paracrine factors and peripherally by hormonal regulation. In the present study, we focus on the Gdnf-Gfra1 pathway that plays a major role in the regulation of SSC self-renewal in mammals.

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Continuous or cyclic production of spermatozoa throughout life in adult male vertebrates depends on a subpopulation of undifferentiated germ cells acting as spermatogonial stem cells (SSCs). What makes these cells self-renew or differentiate is barely understood, in particular in nonmammalian species, including fish. In the highly seasonal rainbow trout, at the end of the annual spermatogenetic cycle, tubules of the spawning testis contain only spermatozoa, with the exception of scarce undifferentiated spermatogonia that remain on the tubular wall and that will support the next round of spermatogenesis.

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