Book contents
- Frontmatter
- Dedication
- Contents
- List of Contributors
- Preface
- Section 1 Historical perspective
- Section 2 Life cycle
- Section 3 Developmental biology
- 8 Structural basis for oocyte–granulosa cell interactions
- 9 Differential gene expression mediated by oocyte–granulosa cell communication
- 10 Hormones and growth factors in the regulation of oocyte maturation
- 11 Getting into and out of oocyte maturation
- 12 Chromosome behavior and spindle formation in mammalian oocytes
- 13 Transcription, accumulation, storage, recruitment, and degradation of maternal mRNA in mammalian oocytes
- 14 Setting the stage for fertilization: transcriptome and maternal factors
- 15 Egg activation: initiation and decoding of Ca2+ signaling
- 16 In vitro growth and differentiation of oocytes
- 17 Metabolism of the follicle and oocyte in vivo and in vitro
- 18 Improving oocyte maturation in vitro
- Section 4 Imprinting and reprogramming
- Section 5 Pathology
- Section 6 Technology and clinical medicine
- Index
- References
12 - Chromosome behavior and spindle formation in mammalian oocytes
from Section 3 - Developmental biology
Published online by Cambridge University Press: 05 October 2013
- Frontmatter
- Dedication
- Contents
- List of Contributors
- Preface
- Section 1 Historical perspective
- Section 2 Life cycle
- Section 3 Developmental biology
- 8 Structural basis for oocyte–granulosa cell interactions
- 9 Differential gene expression mediated by oocyte–granulosa cell communication
- 10 Hormones and growth factors in the regulation of oocyte maturation
- 11 Getting into and out of oocyte maturation
- 12 Chromosome behavior and spindle formation in mammalian oocytes
- 13 Transcription, accumulation, storage, recruitment, and degradation of maternal mRNA in mammalian oocytes
- 14 Setting the stage for fertilization: transcriptome and maternal factors
- 15 Egg activation: initiation and decoding of Ca2+ signaling
- 16 In vitro growth and differentiation of oocytes
- 17 Metabolism of the follicle and oocyte in vivo and in vitro
- 18 Improving oocyte maturation in vitro
- Section 4 Imprinting and reprogramming
- Section 5 Pathology
- Section 6 Technology and clinical medicine
- Index
- References
Summary
Abstract
The formation of the meiotic spindle is a critical process to assure accurate chromosome segregation and subsequent embryo development. Coordinated formation and organization of microtubules, centrosomes, and chromosomes is important for meiotic spindle formation at the oocyte's center after germinal vesicle breakdown (GVBD), for the formation of the MI (meiosis I) spindle to segregate homologous chromosomes, and for the formation of the MII (meiosis II) spindle to segregate chromatids, resulting in oocyte haploidy. The human oocyte is particularly susceptible to errors in chromosome segregation which may be related to defective centrosome and microtubule organization and to defective chromosome attachment to kinetochore microtubules and loss of molecular surveillance factors. The present chapter is focused on (1) formation of central, MI and MII spindle, with focus on microtubules and centrosomes; (2) chromosome dynamics and segregation during MI and MII, with focus on molecular aspects and surveillance mechanisms; and (3) spindle abnormalities, environmental influences, and possible treatments to restore spindle integrity with implications for assisted reproductive technologies (ART).
Introduction
The formation of the meiotic spindle is a critical step during oocyte maturation and begins when the germinal vesicle breaks down (GVBD) as a result of stimulation by luteinizing hormone (LH). Spindle formation in most mammalian oocytes takes place at the oocyte's center and involves significant restructuring of the cytoskeleton that will impact subsequent cellular and molecular functions that are also important for later development [1]. Coordinated formation and organization of microtubules, centrosomes, and chromosomes begins directly after GVBD with remodeling of these major spindle components in the oocyte's center to form the meiotic spindle.
- Type
- Chapter
- Information
- Biology and Pathology of the OocyteRole in Fertility, Medicine and Nuclear Reprograming, pp. 142 - 153Publisher: Cambridge University PressPrint publication year: 2013
References
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