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The physiological acquisition of amoeboid mot... [Mol Reprod Dev. 2010] - PubMed - NCBI
احتمالا این مقاله بوده است !
The physiological acquisition of amoeboid mot... [Mol Reprod Dev. 2010] - PubMed - NCBI
پاسخ : اسپرم
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The physiological acquisition of amoeboid motility in nematode sperm: is the tail the only thing the sperm lost?
AuthorsFraire-Zamora JJ, et al. Show all Journal
Mol Reprod Dev. 2010 Sep;77(9):739-50. doi: 10.1002/mrd.21193.
Affiliation
Department of Biology and the Graduate Program in Evolution, Ecology, and Organismal Biology, University of California, Riverside, California 92521, USA.
Abstract
Nematode spermatozoa are highly specialized amoeboid cells that must acquire motility through the extension of a single pseudopod. Despite morphological and molecular differences with flagellated spermatozoa (including a non-actin-based cytoskeleton), nematode sperm must also respond to cues present in the female reproductive tract that render them motile, thereby allowing them to locate and fertilize the egg. The factors that trigger pseudopod extension in vivo are unknown, although current models suggest the activation through proteases acting on the sperm surface resulting in a myriad of biochemical, physiological, and morphological changes. Compelling evidence shows that pseudopod extension is under the regulation of physiological events also observed in other eukaryotic cells (including flagellated sperm) that involve membrane rearrangements in response to extracellular cues that initiate various signal transduction pathways. An integrative approach to the study of nonflagellated spermatozoa will shed light on the identification of unique and conserved processes during fertilization among different taxa.
(c) 2010 Wiley-Liss, Inc.
PMID 20803732 [PubMed - indexed for MEDLINE]
Full text: John Wiley & Sons, Inc.
Related CitationsShow all
Transformation: how do nematode sperm become activated and crawl?
Sperm motility and MSP.
Cholesterol-enriched microdomains regulate pseudopod extension in the MSP-based cytoskeleton of amoeboid sperm.
A unique cytoskeleton associated with crawling in the amoeboid sperm of the nematode, Standard PubMedNIH/NLM NCBI Copyright Help
- - - Updated - - -
اين كه كانلا ميگه اميبيه حركتشون!!!
به اين عبارت توجه كن!!
Despite morphological and molecular differences with flagellated spermatozoa
Search
The physiological acquisition of amoeboid motility in nematode sperm: is the tail the only thing the sperm lost?
AuthorsFraire-Zamora JJ, et al. Show all Journal
Mol Reprod Dev. 2010 Sep;77(9):739-50. doi: 10.1002/mrd.21193.
Affiliation
Department of Biology and the Graduate Program in Evolution, Ecology, and Organismal Biology, University of California, Riverside, California 92521, USA.
Abstract
Nematode spermatozoa are highly specialized amoeboid cells that must acquire motility through the extension of a single pseudopod. Despite morphological and molecular differences with flagellated spermatozoa (including a non-actin-based cytoskeleton), nematode sperm must also respond to cues present in the female reproductive tract that render them motile, thereby allowing them to locate and fertilize the egg. The factors that trigger pseudopod extension in vivo are unknown, although current models suggest the activation through proteases acting on the sperm surface resulting in a myriad of biochemical, physiological, and morphological changes. Compelling evidence shows that pseudopod extension is under the regulation of physiological events also observed in other eukaryotic cells (including flagellated sperm) that involve membrane rearrangements in response to extracellular cues that initiate various signal transduction pathways. An integrative approach to the study of nonflagellated spermatozoa will shed light on the identification of unique and conserved processes during fertilization among different taxa.
(c) 2010 Wiley-Liss, Inc.
PMID 20803732 [PubMed - indexed for MEDLINE]
Full text: John Wiley & Sons, Inc.
Related CitationsShow all
Transformation: how do nematode sperm become activated and crawl?
Sperm motility and MSP.
Cholesterol-enriched microdomains regulate pseudopod extension in the MSP-based cytoskeleton of amoeboid sperm.
A unique cytoskeleton associated with crawling in the amoeboid sperm of the nematode, Standard PubMedNIH/NLM NCBI Copyright Help
- - - Updated - - -
اين كه كانلا ميگه اميبيه حركتشون!!!
به اين عبارت توجه كن!!
Despite morphological and molecular differences with flagellated spermatozoa
پاسخ : اسپرم
تاژک را که اقای فرشباف فرمودند . نمی دونم در این جانداران zona pellucida وجود دارد یا نه؟
http://en.wikipedia.org/wiki/Zona_pellucida
تاژک را که اقای فرشباف فرمودند . نمی دونم در این جانداران zona pellucida وجود دارد یا نه؟
http://en.wikipedia.org/wiki/Zona_pellucida
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درمورد تاژک:یکی حرف آقای فرشباف خوب بود یکی اینکه شاید یک چیزی به اسپرم کمک میکنه بعد شایدم اسپرم نیازه یک مقدار رو بره و بقیشو تخمک انجام بده.شرایط محیطی هم برای حرکت آمیبی خوبه.
درمورد اکروزوم:شاید اصلا بهش نیاز نباشه و اینکه خود تخمک با انجام یه عملی اسپرم رو بیاره داخل.شایدم جنس دیواره فرق داره.جنسش چیه در نماتد ها؟
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