keyword
MENU ▼
Read by QxMD icon Read
search

Spermiogenesis

keyword
https://www.readbyqxmd.com/read/29236364/intraflagellar-transporter-protein-140-ift140-a-component-of-ift-a-complex-is-essential-for-male-fertility-and-spermiogenesis-in-mice
#1
Yong Zhang, Hong Liu, Wei Li, Zhengang Zhang, Shiyang Zhang, Maria E Teves, Courtney Stevens, James A Foster, Gregory E Campbell, Jolene J Windle, Rex A Hess, Gregory J Pazour, Zhibing Zhang
Intraflagellar transport (IFT) is a conserved mechanism essential for the assembly and maintenance of most eukaryotic cilia and flagella. However, little is known about its role in sperm flagella formation and male fertility. IFT140 is a component of IFT-A complex. In mouse, it is highly expressed in the testis. Ift140 gene was inactivated specifically in mouse spermatocytes/spermatids. The mutant mice did not show any gross abnormalities, but all were infertile associated with significantly reduced sperm number and motility...
December 13, 2017: Cytoskeleton
https://www.readbyqxmd.com/read/29228727/prohibitin-mediated-mitochondrial-ubiquitination-during-spermiogenesis-in-chinese-mitten-crab-eriocheir-sinensis
#2
Cong-Cong Hou, Chao-Guang Wei, Cheng-Peng Lu, Xin-Ming Gao, Wan-Xi Yang, Jun-Quan Zhu
The sperm of Eriocheir sinensis has a cup-shaped nucleus that contains several mitochondria embedded at the opening of the cup. The acrosome vesicle also contains derivants of mitochondria. The mitochondria distribution pattern involves a decrease in the number and changes in the structure and transportation of these organelles. The decreased number of sperm mitochondria is achieved through autophagy or the ubiquitination pathway. Prohibitin (PHB), the mitochondria inner membrane protein, is an evolutionarily highly conserved protein, is closely associated with spermatogenesis and sperm quality control and is also a potential substrate of ubiquitination...
November 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/29186293/early-histone-h4-acetylation-during-chromatin-remodeling-in-equine-spermatogenesis
#3
Chelsea C Ketchum, Casey D Larsen, Alexis McNeil, Mirella L Meyer-Ficca, Ralph G Meyer
Chromatin remodeling during spermatogenesis culminates in the exchange of nucleosomes for transition proteins and protamines as an important part of spermatid development to give rise to healthy sperm. Comparative immunofluorescence analyses of equine and murine testis histological sections were used to characterize nucleoprotein exchange in the stallion. Histone H4 hyperacetylation is considered a key event of histone removal during the nucleoprotein transition to a protamine-based sperm chromatin structure...
November 25, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/29159832/expression-and-localisation-of-rxfp3-in-human-spermatozoa-and-impact-of-insl7-on-sperm-functions
#4
S Heidari, A H Taromchi, R Nejatbakhsh, S Shokri
Insulin-like peptide 7 (INSL7) or relaxin-3 is a member of the insulin superfamily that is recently discovered. This hormone interacts with relaxin family peptide receptor 3 (RXFP3). Although recent studies of INSL7 have focused on its function in the brain as a neuropeptide, spermatozoa may be a candidate target of INSL7 due to its detection in testes and contains binding sites. Therefore, this study aims to analyse the expression and localisation of RXFP3 on human spermatozoa and to assess the effect of INSL7 on human sperm motility...
November 21, 2017: Andrologia
https://www.readbyqxmd.com/read/29155043/stk33-is-required-for-spermatid-differentiation-and-male-fertility-in-mice
#5
Leila R Martins, Raffaela K Bung, Stefan Koch, Karsten Richter, Laura Schwarzmüller, Dorothee Terhardt, Bahtiyar Kurtulmus, Christof Niehrs, Arefeh Rouhi, Ingrid Lohmann, Gislene Pereira, Stefan Fröhling, Hanno Glimm, Claudia Scholl
Spermiogenesis is the final phase during sperm cell development in which round spermatids undergo dramatic morphological changes to generate spermatozoa. Here we report that the serine/threonine kinase Stk33 is essential for the differentiation of round spermatids into functional sperm cells and male fertility. Constitutive Stk33 deletion in mice results in severely malformed and immotile spermatozoa that are particularly characterized by disordered structural tail elements. Stk33 expression first appears in primary spermatocytes, and targeted deletion of Stk33 in these cells recapitulates the defects observed in constitutive knockout mice, confirming a germ cell-intrinsic function...
November 16, 2017: Developmental Biology
https://www.readbyqxmd.com/read/29126117/dynamic-reorganization-of-open-chromatin-underlies-diverse-transcriptomes-during-spermatogenesis
#6
So Maezawa, Masashi Yukawa, Kris G Alavattam, Artem Barski, Satoshi H Namekawa
During spermatogenesis, germ cells undergo massive cellular reconstruction and dynamic chromatin remodeling to facilitate highly diverse transcriptomes, which are required for the production of functional sperm. However, it remains unknown how germline chromatin is organized to promote the dynamic, complex transcriptomes of spermatogenesis. Here, using ATAC-seq, we establish the varied landscape of open chromatin during spermatogenesis. We identify the reorganization of accessible chromatin in intergenic and intronic regions during the mitosis-to-meiosis transition...
November 6, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/29117517/role-of-disulfide-bonds-on-dna-packaging-forces-in-bull-sperm-chromatin
#7
James M Hutchison, Donald C Rau, Jason E DeRouchey
Short arginine-rich proteins called protamines mediate the near crystalline DNA packaging in most vertebrate sperm cells. Protamines are synthesized during spermiogenesis and condense the paternal genome into a transcriptionally inactive state in late-stage spermatids. Protamines from eutherian mammals, including bulls and humans, also contain multiple cysteine residues that form intra- and interprotamine sulfur-sulfur bonds during the final stages of sperm maturation. Although the cross-linked protamine network is known to stabilize the resulting nucleoprotamine structure, little is known about the role of disulfide bonds on DNA condensation in the mammalian sperm...
November 7, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/29109362/papolb-tpap-regulates-spermiogenesis-independently-of-chromatoid-body-associated-factors
#8
Shin-Ichi Kashiwabara, Satsuki Tsuruta, Yutaro Yamaoka, Kanako Oyama, Chieko Iwazaki, Tadashi Baba
Mutant mice lacking a testis-specific cytoplasmic poly(A) polymerase, PAPOLB/TPAP, exhibit spermiogenesis arrest and male infertility. However, the mechanism by which PAPOLB regulates spermiogenesis remains unclear. In this study, we examined the relationships between PAPOLB and other spermiogenesis regulators present in the chromatoid body (CB). The loss of PAPOLB had no impact either on the abundance of CB components such as PIWIL1, TDRD6, YBX2, and piRNAs, or on retrotransposon expression. In addition, localization of CB proteins and CB architecture were both normal in PAPOLB-null mice...
November 3, 2017: Journal of Reproduction and Development
https://www.readbyqxmd.com/read/29099948/heritable-sperm-chromatin-epigenetics-a-break-to-remember
#9
Ralph G Meyer, Chelsea Ketchum, Mirella L Meyer-Ficca
Sperm chromatin not only has a unique structure to condense and protect the paternal DNA in transit, but also provides epigenetic information that supports embryonic development. Most of the unique sperm nuclear architecture is formed during the sweeping postmeiotic chromatin remodeling events in spermiogenesis, where the majority of nucleosomes are removed and replaced by protamines. The remaining histones and other chromatin proteins are located in structurally and transcriptionally relevant positions in the genome and carry diverse posttranslational modifications relevant to the control of embryonic gene expression...
November 1, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/29099633/aging-deteriorates-quality-of-sperm-produced-by-male-mice-with-partial-yq-deletion
#10
Katarzyna Kotarska, Andrzej Doniec, Magdalena Bednarska, Zbigniew Polański, Józefa Styrna
The aim of the study was to assess the cumulative effects of aging and Y-chromosome long arm deletion on sperm quality parameters. Motility, mitochondrial activity, and head morphology were evaluated for sperm of 3- and 12-month-old males from B10.BR-Y(del) and B10.BR congenic mouse strains. The study revealed that quality and fertilizing potential of sperm produced by younger and older B10.BR males persist on similar levels, but worsen significantly with age of B10.BR-Y(del) males. The findings imply that partial Yq deletions might be more harmful for spermiogenesis in advancing age and may be applicable to other species including humans...
November 3, 2017: Systems Biology in Reproductive Medicine
https://www.readbyqxmd.com/read/29095993/mael-promoter-hypermethylation-is-associated-with-de-repression-of-line-1-in-human-hypospermatogenesis
#11
Yu-Sheng Cheng, Shi-Kae Wee, Tsung-Yen Lin, Yung-Ming Lin
STUDY QUESTION: Does the hypermethylation of the maelstrom spermatogenic transposon silencer (MAEL) promoter and subsequent de-repression of transposable elements represent one of the causes of spermatogenic failure in infertile men? SUMMARY ANSWER: Experimental hypermethylation of a specific region (-131 to +177) of the MAEL promoter leads to decreased expression of MAEL with increased expression of the transposable element LINE-1 (L1) and in infertile men methylation of the MAEL promoter is associated with the severity of spermatogenic failure...
December 1, 2017: Human Reproduction
https://www.readbyqxmd.com/read/29095551/genetic-expansion-of-chaperonin-containing-tcp-1-cct-tric-complex-subunits-yields-testis-specific-isoforms-required-for-spermatogenesis-in-planarian-flatworms
#12
Jenna T Counts, Tasha M Hester, Labib Rouhana
Chaperonin-containing Tail-less complex polypeptide 1 (CCT) is a highly conserved, hetero-oligomeric complex that ensures proper folding of actin, tubulin, and regulators of mitosis. Eight subunits (CCT1-8) make up this complex, and every subunit has a homolog expressed in the testes and somatic tissue of the planarian flatworm Schmidtea mediterranea. Gene duplications of four subunits in the genomes of S. mediterranea and other planarian flatworms created paralogs to CCT1, CCT3, CCT4, and CCT8 that are expressed exclusively in the testes...
November 2, 2017: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/29092794/evidence-of-a-procentriole-during-spermiogenesis-in-the-coccinellid-insect-adalia-decempunctata-l-an-ultrastructural-study
#13
Romano Dallai, David Mercati, José Lino-Neto, Glenda Dias, Pietro Lupetti
We studied spermatogenesis and spermiogenesis in Adaliadecempunctata (L), a beetle of the Coccinellidae family. The spermatocyte exhibits two centrioles which elongate to form a pair of primary cilia. A novel structure, appearing in cross sections as a dense droplet, is observed near the long centriole during spermiogenesis, and is soon accompanied by a procentriole (PCL). PCL structure consists of singlet microtubules, a central tubule and an incomplete cartwheel. The PCL persists until the end of spermiogenesis, when it vanishes together with the dense droplet...
October 29, 2017: Arthropod Structure & Development
https://www.readbyqxmd.com/read/29057491/insight-into-curcumin-nanomicelle-induced-derangements-in-male-reproduction-potential-an-experimental-study
#14
S Moshari, V Nejati, G Najafi, M Razi
This study was conducted to investigate the possible effects of nanomicelle curcumin (NMC) on spermatogenesis, sperm parameters and in vitro fertilisation potential. For this purpose, 24 mature male Wistar rats were divided into control and test groups. The animals in test groups received 7.5, 15 and 30 mg kg b.w(-1) of NMC (NO = 6 rats in each group). Following 48 days, the DNA integrity of testicular tissues, tubular differentiation (TDI) and spermiogenesis (SPI) indices, sperm parameters and DNA integrity were analysed...
October 23, 2017: Andrologia
https://www.readbyqxmd.com/read/29036365/the-developmental-origin-and-compartmentalization-of-glutathione-s-transferase-omega-2-isoforms-in-the-perinuclear-theca-of-eutherian-spermatozoa
#15
Lauren E Hamilton, Genevieve Acteau, Wei Xu, Peter Sutovsky, Richard Oko
The perinuclear theca (PT) is a condensed, nonionic detergent resistant cytosolic protein layer encapsulating the sperm head nucleus. It can be divided into two regions: the subacrosomal layer, whose proteins are involved in acrosomal assembly during spermiogenesis, and the postacrosomal sheath (PAS), whose proteins are implicated in sperm-oocyte interactions during fertilization. In continuation of our proteomic analysis of the PT, we have isolated two prominent PT-derived proteins of 28 and 31 kDa from demembranated bovine sperm head fractions...
October 1, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/29025071/the-expression-characteristics-of-fam71d-and-its-association-with-sperm-motility
#16
Qian Ma, Yuchi Li, Manling Luo, Huan Guo, Shouren Lin, Jianbo Chen, Y Du, Zhimao Jiang, Yaoting Gui
STUDY QUESTION: What are the features of FAM71D (Family with sequence similarity 71, member D) expression and is there an association between FAM71D expression and sperm motility? SUMMARY ANSWER: FAM71D, a novel protein exclusively expressed in the testis, is located in sperm flagella and is functionally involved in sperm motility. WHAT IS KNOWN ALREADY: Some testis-specific proteins have been reported as potential diagnostic biomarkers to evaluate the spermatogenesis process and sperm quality...
November 1, 2017: Human Reproduction
https://www.readbyqxmd.com/read/29022902/differential-regulation-of-spermatogenic-process-by-lkb1-isoforms-in-mouse-testis
#17
Feifei Kong, Mei Wang, Xiaojing Huang, Qiuling Yue, Xiang Wei, Xiaowei Dou, Xiaoxu Peng, Yuanyuan Jia, Ke Zheng, Tinghe Wu, Jun Yan, Jing Li
Liver serine/threonine kinase B1 (LKB1) is a tumor suppressor associated with the pathogenesis of Peutz-Jeghers syndrome. Affected males are at increased risk of developing Sertoli cell tumors and display defective spermatogenesis. Male mice lacking the short isoform (Lkb1S) of Lkb1 were sterile and exhibited abnormal spermiogenesis. In addition to the short isoform, the long isoform of Lkb1 (Lkb1L) is also expressed in testis; however, the requirement of the long isoform for fertility and the functional difference between the isoforms remain unknown...
October 12, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/29018194/pnldc1-is-essential-for-pirna-3-end-trimming-and-transposon-silencing-during-spermatogenesis-in-mice
#18
Deqiang Ding, Jiali Liu, Kunzhe Dong, Uros Midic, Rex A Hess, Huirong Xie, Elena Y Demireva, Chen Chen
Piwi-interacting RNAs are small regulatory RNAs with key roles in transposon silencing and regulation of gametogenesis. The production of mature piwi-interacting RNAs requires a critical step of trimming piwi-interacting RNA intermediates to achieve optimally sized piwi-interacting RNAs. The poly(A)-specific ribonuclease family deadenylase PNLDC1 is implicated in piwi-interacting RNA trimming in silkworms. The physiological function of PNLDC1 in mammals remains unknown. Using Pnldc1-deficient mice, here we show that PNLDC1 is required for piwi-interacting RNA biogenesis, transposon silencing, and spermatogenesis...
October 10, 2017: Nature Communications
https://www.readbyqxmd.com/read/28986724/progestin-is-important-for-testicular-development-of-male-turbot-scophthalmus-maximus-during-the-annual-reproductive-cycle-through-functionally-distinct-progestin-receptors
#19
Chengcheng Feng, Shihong Xu, Yifan Liu, Yanfeng Wang, Wenqi Wang, Jingkun Yang, Chunyan Zhao, Qinghua Liu, Jun Li
In teleost, sex steroid hormones are critical for reproduction. Progestin is known to promote spermiation. To further understand the functions of progestin via its receptors during the annual reproductive cycle in male turbot (Scophthalmus maximus), we observed testicular development, quantified several sex steroid hormones, detected the expression of progestin receptors, and measured various sperm parameters. Results showed that the turbot testicular structure was of the lobular type. During breeding season, a number of spermatocytes (stage III) developed into spermatids (stage IV), then differentiated into sperm during spermiogenesis (stage V), and finally regressed to spermatocytes (stage VI)...
October 6, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/28965865/cell-polarity-and-cytoskeletons-lesson-from-the-testis
#20
REVIEW
Qing Wen, Dolores Mruk, Elizabeth I Tang, Chris K C Wong, Wing-Yee Lui, Will M Lee, Xiang Xiao, Bruno Silvestrini, C Yan Cheng
Cell polarity in the adult mammalian testis refers to the polarized alignment of developing spermatids during spermiogenesis and the polarized organization of organelles (e.g., phagosomes, endocytic vesicles, Sertoli cell nuclei, Golgi apparatus) in Sertoli cells and germ cells to support spermatogenesis. Without these distinctive features of cell polarity in the seminiferous epithelium, it is not possible to support the daily production of millions of sperm in the limited space provided by the seminiferous tubules in either rodent or human males through the adulthood...
October 6, 2017: Seminars in Cell & Developmental Biology
keyword
keyword
40927
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"