Article
Genetics & Heredity
Leah F. Rosin, Jose Gil, Ines A. Drinnenberg, Elissa P. Lei
Summary: Accurate chromosome segregation is crucial for reproductive success. The use of Oligopaints in the silkworm Bombyx mori has provided new insights into mechanisms of homolog pairing during meiosis, revealing asynchronous pairing, transcription-biased pairing in males, and similarities in bivalent formation with C. elegans. Furthermore, the study suggests that microtubule recruitment may be dependent on kinetochore proteins but independent of centromeres, and that telomeres play a central role in regulating chromosome interactions during sperm and egg development.
Editorial Material
Genetics & Heredity
Charles Addo Nyarko, Annaliese S. Mason
Summary: Polyploids need to segregate homologous chromosomes correctly, which is not only determined by sequence similarity but also under strong genetic control that may vary between lineages. Factors such as partner availability and genome structure may also influence the level of sequence similarity required for crossover formation.
TRENDS IN GENETICS
(2022)
Article
Developmental Biology
Yuki Takada, Ruken Yaman-Deveci, Takayuki Shirakawa, Jafar Sharif, Shin-Ichi Tomizawa, Fumihito Miura, Takashi Ito, Michio Ono, Kuniko Nakajima, Yoko Koseki, Fuyuko Shiotani, Kei-Ichiro Ishiguro, Kazuyuki Ohbo, Haruhiko Koseki
Summary: The study revealed that the essential proteins for maintenance DNA methylation, NP95 and DNMT1, are co-expressed in spermatogonia and are necessary for meiosis in male germ cells. Deficiency in Np95 or Dnmt1 in spermatocytes results in spermatogenic defects such as synaptic failure and disruption of pericentric heterochromatin clusters.
Article
Agronomy
Xin Zhang, Zhuang Meng, Jinlei Han, Haris Khurshid, Ayman Esh, Robert Hasterok, Kai Wang
Summary: Autopolyploidy and allopolyploidy are common in plants, but autopolyploidy has received less attention and its evolutionary consequences are unclear. Using chromosome painting probes and fluorescence in situ hybridization, we studied chromosome behavior in autotetraploid, autooctoploid, and autodecaploid sugarcane clones. All autopolyploid clones exhibited stable diploidized chromosome behavior, with preferential pairing observed between homologous copies of chromosome 8. Sequence variation analysis showed no apparent differences among homologs of chromosome 8. Our results suggest that unknown mechanisms, other than DNA sequence similarity, contribute to stable meiotic behavior in these autopolyploid sugarcane plants.
Article
Reproductive Biology
Naru Zhou, Qiuchen Liu, Xin Qi, Xiangdong Zhang, Zhenyuan Ru, Yangyang Ma, Tong Yu, Mianqun Zhang, Yunsheng Li, Yunhai Zhang, Zubing Cao
Summary: Paraquat exposure has toxic effects on porcine oocyte maturation, inhibiting cumulus cell expansion, reducing the rate of first polar body extrusion, and preventing oocytes from developing to later stages. These effects are likely mediated through oxidative stress, as indicated by changes in spindle structure, chromosome alignment, F-actin distribution, mitochondrial activity, and levels of reactive oxygen species, rH2AX, and the autophagy marker LC3. Additionally, gene expression associated with cumulus cell expansion is affected by PQ exposure, but not apoptosis-related genes.
Article
Biochemistry & Molecular Biology
Stacey L. Hanlon, R. Scott Hawley
Summary: Selfish genetic elements use various mechanisms to ensure their inheritance and survival at the expense of the host. However, our understanding of the suppression systems against such selfish behavior is limited. In this study, the biased transmission of non-essential B chromosomes in Drosophila melanogaster was achieved in a specific genetic background. The combination of a mutant of the matrimony gene and the TM3 balancer chromosome created a female-specific driving genotype for the biased transmission of the B chromosomes. The abnormal localization of B chromosomes during meiosis suggests a failure in the mechanism responsible for their proper distribution.
Article
Endocrinology & Metabolism
Qian Zhang, Chengqiu Tao, Shuchang Gao, Shan Li, Bingying Xu, Hanni Ke, Yiyang Wang, Feng Zhang, Yingying Qin, Ling Zhang, Ting Guo
Summary: A splicing site variant in KASH5 is responsible for POI due to defective meiotic homolog pairing and accelerated depletion of oocytes. Our study is the first to report the involvement of disorganized LINC complex in the pathogenesis of POI, potentially suggesting the essential roles of meiotic telomere attachment and dynein-driven proteins for chromosome movement in ovarian function maintenance.
JOURNAL OF CLINICAL ENDOCRINOLOGY & METABOLISM
(2022)
Article
Biochemistry & Molecular Biology
Lei Peng, Yijing He, Weihan Wang, Yajie Chu, Qixin Lin, Rong Rui, Qiao Li, Shiqiang Ju
Summary: In this study, the importance of PAK1 in regulating spindle assembly and cell cycle progression during the first meiotic division of porcine oocytes was highlighted. The activated PAK1 showed dynamic expression and its subcellular localization was closely associated with spindle dynamics. Inhibition of PAK1 activity by IPA-3 led to impaired extrusion of PB1 and failure of bipolar spindle formation, which could be restored by reducing disulfide bonds between PAK1 and IPA-3.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Biochemical Research Methods
Erik J. Navarro, Wallace F. Marshall, Jennifer C. Fung
Summary: During meiosis, homologous chromosomes must quickly pair up while mitigating and resolving interlocks. The active motion of telomeres speeds up pairing, while an increase in nuclear size slows down pairing but reduces the number of interlocks significantly.
PLOS COMPUTATIONAL BIOLOGY
(2022)
Article
Reproductive Biology
Cai-Xia Yang, Shuai Liu, Jia-Kun Miao, Qiao Mou, Xiao-Man Liu, Pei-Chao Wang, Li-Jun Huo, Zhi-Qiang Du
Summary: This study demonstrates that 50 mM of CoQ10 is effective in promoting nuclear maturation of pig oocytes, accelerating blastocyst development, improving mitochondrial function, suppressing oxidative stress, and reducing apoptosis.
Article
Biology
Regina Rillo-Bohn, Renzo Adilardi, Therese Mitros, Baris Avsaroglu, Lewis Stevens, Simone Kohler, Joshua Bayes, Clara Wang, Sabrina Lin, K. Alienor Baskevitch, Daniel S. Rokhsar, Abby F. Dernburg
Summary: Meiosis is a conserved process in eukaryotes but can vary in its details. The nematode Pristionchus pacificus has been identified as a new model system for molecular analysis of meiosis, showing differences with the widely studied Caenorhabditis elegans in the expression of recombinases and the processes of synapsis and crossover formation.
Article
Evolutionary Biology
Philip G. Madgwick, Jason B. Wolf
Summary: Meiotic drivers are selfish genetic elements that interfere with the process of meiosis for their own transmission, often through gamete killing. While expected to be evolutionarily transient, ancient killer meiotic drivers have been discovered to persist for millions of years. Various drive mechanisms and associated suppressor mechanisms contribute to the evolutionary robustness of these drivers.
Review
Biochemistry & Molecular Biology
Frances E. Clark, Takashi Akera
Summary: Female meiotic drive is a phenomenon where a selfish genetic element alters chromosome segregation during female meiosis to transmit more frequently to the next generation. Despite known examples for many years, a molecular understanding of the underlying mechanisms has been challenging. Recent advances in several model species have prompted a comparative re-examination of these drive systems.
Review
Genetics & Heredity
Filip Pajpach, Tianyu Wu, Linda Shearwin-Whyatt, Keith Jones, Frank Gruetzner
Summary: Chromosome segregation is a multistep process involving critical components such as centromeres, kinetochores, and cohesion factors. While homologous chromosome segregation was traditionally believed to be random, recent studies have shown non-random segregation phenomena, challenging the textbook dogma. Mechanisms of meiotic drive and biased segregation of autosomes and sex chromosomes provide insight into the underlying mechanisms of chromosome segregation.
Article
Cell Biology
Anna Kouznetsova, Jian Guo Liu, Sonata Valentiniene, Hjalmar Brismar, Christer Hoog
Summary: Aging significantly impacts the chromosome segregation process in human oocytes, leading to aneuploidy, infertility, and developmental disorders. As age increases, the likelihood of chromosome segregation irregularities also increases, resulting in a higher incidence of aneuploidy.
Article
Cell Biology
Nicolas Mary, Stephane Ferchaud, Harmonie Barasc, Anne Calgaro, Nathalie Bonnet, Alain Ducos, Alain Pinton
CYTOGENETIC AND GENOME RESEARCH
(2018)
Correction
Multidisciplinary Sciences
Annabelle Congras, Harmonie Barasc, Kamila Canale-Tabet, Florence Plisson-Petit, Chantal Delcros, Olivier Feraud, Noufissa Oudrhiri, Eva Hadadi, Franck Griscelli, Annelise Bennaceur-Griscelli, Ali Turhan, Marielle Afanassieff, Stephane Ferchaud, Alain Pinton, Martine Yerle-Bouissou, Herve Acloque
SCIENTIFIC REPORTS
(2018)
Article
Developmental Biology
Nicolas Mary, Daniel A. F. Villagomez, Tamas Revay, Samira Rezaei, Brendan Donaldson, Alain Pinton, W. Allan King
SEXUAL DEVELOPMENT
(2018)
Article
Cell Biology
Harmonie Barasc, Nathalie Mouney-Bonnet, Clemence Peigney, Anne Calgaro, Clemence Revel, Nicolas Mary, Alain Ducos, Alain Pinton
CYTOGENETIC AND GENOME RESEARCH
(2018)
Letter
Environmental Sciences
Maria Michela Pallotta, Vincenza Barbato, Alain Pinton, Herve Acloque, Roberto Gualtieri, Riccardo Talevi, Helene Jammes, Teresa Capriglione
ENVIRONMENTAL AND MOLECULAR MUTAGENESIS
(2019)
Article
Biotechnology & Applied Microbiology
Alexander Grahofer, Anna Letko, Irene Monika Hafliger, Vidhya Jagannathan, Alain Ducos, Olivia Richard, Vanessa Peter, Heiko Nathues, Cord Drogemuller
Article
Multidisciplinary Sciences
Samira Rezaei, Brendan Donaldson, Daniel A. F. Villagomez, Tamas Revay, Nicolas Mary, Daniela A. Grossi, W. Allan King
SCIENTIFIC REPORTS
(2020)
Article
Veterinary Sciences
Geoffrey Petit, Vladimir Grosbois, Karine Chalvet-Monfray, Alain Ducos, Daniel Desmecht, Guy-Pierre Martineau, Anouk Decors
RESEARCH IN VETERINARY SCIENCE
(2020)
Article
Genetics & Heredity
Nicolas Mary, Anne Calgaro, Harmonie Barasc, Nathalie Bonnet, Stephane Ferchaud, Isabelle Raymond-Letron, Alain Ducos, Alain Pinton
Summary: Balanced constitutional reciprocal translocations in carriers typically result in a normal phenotype but can lead to reproductive disorders. A study in pigs found that an autosome-autosome translocation associated with azoospermia can cause unpaired autosomal segments in the meiotic process, potentially leading to total meiotic arrest. Gene expression analysis revealed downregulation of genes on chromosomes 1 and 15, without upregulation of SSCX genes, suggesting a mechanism involving the silencing of autosomal genes during meiosis.
Article
Agriculture, Dairy & Animal Science
Pascale Le Roy, Alain Ducos, Florence Phocas
INRA PRODUCTIONS ANIMALES
(2019)
Meeting Abstract
Genetics & Heredity
A. Pinton, A. N. Mary, H. Barasc, N. Bonnet, Calgaro, P. Berlib, S. Ferchaud, I. Raymond Letron, T. Faraut, H. Acloque, A. Ducos
MOLECULAR CYTOGENETICS
(2019)
Meeting Abstract
Plant Sciences
Alain Pinton, Anne Calgaro, Nicolas Mary, Harmonie Barasc, Nathalie. Bonnet, Clemence Revel, Stephane Ferchaud, Isabelle Raymond Letron, Thomas Faraut, Herve Acloque, Alain Ducos
COMPARATIVE CYTOGENETICS
(2018)
Meeting Abstract
Plant Sciences
Harmonie Barasc, Anne Calgaro, Nicolas Mary, Nathalie Mouney-Bonnet, Clemence Revel, Alain Ducos, Valerie Fillon, Alain Pinton
COMPARATIVE CYTOGENETICS
(2018)