scholarly journals Drosophila epigenome reorganization during oocyte differentiation and early embryogenesis

2014 ◽  
Vol 13 (3) ◽  
pp. 246-253 ◽  
Author(s):  
N. Iovino
Keyword(s):  
Early Embryogenesis ◽  
Oocyte Differentiation

Role of Auxin in Early Embryogenesis of Plants

2014 ◽  
Vol 48 (4) ◽  
pp. 371-380
Author(s):  
Song Lizhen ◽  
Wang Yi ◽  
Yang Qinghua ◽  
Cheng Youfa
Keyword(s):  
Early Embryogenesis

pitkinD, a Novel Gain-of-Function Enhancer of Position-Effect Variegation, Affects Chromatin Regulation During Oogenesis and Early Embryogenesis in Drosophila

Genetics ◽  
2001 ◽  
Vol 157 (3) ◽  
pp. 1227-1244 ◽  
Author(s):  
Steffi Kuhfittig ◽  
János Szabad ◽  
Gunnar Schotta ◽  
Jan Hoffmann ◽  
Endre Máthé ◽  
...  
Keyword(s):  
Germ Line ◽  
Position Effect ◽  
Early Embryogenesis ◽  
Position Effect Variegation ◽  
Chromatin Regulation ◽  
Gain Of Function ◽  
Position Effects ◽  
Dominant Female ◽  
Effect Variegation ◽  
Female Germ Line

Abstract The vast majority of the >100 modifier genes of position-effect variegation (PEV) in Drosophila have been identified genetically as haplo-insufficient loci. Here, we describe pitkinDominant (ptnD), a gain-of-function enhancer mutation of PEV. Its exceptionally strong enhancer effect is evident as elevated spreading of heterochromatin-induced gene silencing along euchromatic regions in variegating rearrangements. The ptnD mutation causes ectopic binding of the SU(VAR)3-9 heterochromatin protein at many euchromatic sites and, unlike other modifiers of PEV, it also affects stable position effects. Specifically, it induces silencing of white+ transgenes inserted at a wide variety of euchromatic sites. ptnD is associated with dominant female sterility. +/+ embryos produced by ptnD/+ females mated with wild-type males die at the end of embryogenesis, whereas the ptnD/+ sibling embryos arrest development at cleavage cycle 1-3, due to a combined effect of maternally provided mutant product and an early zygotic lethal effect of ptnD. This is the earliest zygotic effect of a mutation so far reported in Drosophila. Germ-line mosaics show that ptn+ function is required for normal development in the female germ line. These results, together with effects on PEV and white+ transgenes, are consistent with the hypothesis that the ptn gene plays an important role in chromatin regulation during development of the female germ line and in early embryogenesis.

scholarly journals Abundant DNA 6mA methylation during early embryogenesis of zebrafish and pig

2016 ◽  
Vol 7 (1) ◽  
Author(s):  
Jianzhao Liu ◽  
Yuanxiang Zhu ◽  
Guan-Zheng Luo ◽  
Xinxia Wang ◽  
Yanan Yue ◽  
...  
Keyword(s):  
Early Embryogenesis

scholarly journals NuSAP is essential for chromatin-induced spindle formation during early embryogenesis

2010 ◽  
Vol 123 (19) ◽  
pp. 3244-3255 ◽  
Author(s):  
A. Vanden Bosch ◽  
T. Raemaekers ◽  
S. Denayer ◽  
S. Torrekens ◽  
N. Smets ◽  
...  
Keyword(s):  
Early Embryogenesis ◽  
Spindle Formation

scholarly journals Secondary Myelitis in Dermal Sinus Causing Paraplegia in a Child with Previously Normal Neurological Function

2016 ◽  
Vol 2016 ◽  
pp. 1-4 ◽  
Author(s):  
Sakina Rashid ◽  
Grace Kinabo ◽  
Marissa Kellogg ◽  
William P. Howlett ◽  
Marieke C. J. Dekker
Keyword(s):  
Congenital Anomaly ◽  
Spina Bifida ◽  
Neural Tube ◽  
Clinical Course ◽  
Acute Infection ◽  
Early Embryogenesis ◽  
The Other ◽  
Neurological Deficits ◽  
Dermal Sinus ◽  
Neurological Development

Neural tube defects result from failure of neural tube fusion during early embryogenesis, the fourth week after conception. The spectrum of severity is not uniform across the various forms of this congenital anomaly as certain presentations are not compatible with extrauterine life (anencephaly) while, on the other hand, other defects may remain undiagnosed as they are entirely asymptomatic (occult spina bifida). We report a child with previously normal neurological development, a devastating clinical course following superinfection of a subtle spina bifida defect which resulted in a flaccid paralysis below the level of the lesion and permanent neurological deficits following resolution of the acute infection and a back closure surgery.

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