منابع مشابه
How and why spermatozoa cause calcium oscillations in mammalian oocytes.
Relationship between latency and period for 5-hydroxytryptamine-induced membrane responses in the Calliphora salivary gland. (1993) Fertilization and thimerosal stimulate similar calcium spiking patterns in mouse oocytes but by separate mechanisms. (19%) Phospholipase C in mouse oocytes: characterisation of ,p" and y isoforms and their possible involvement in sperm-induced Ca 2+ spiking. (1994)...
متن کاملSlow calcium oscillations in human spermatozoa.
We have used single-cell imaging to investigate intracellular Ca2+ signalling in human spermatozoa stimulated with progesterone (3 microM). In approx. 9% of cells progesterone caused the activation of slow repetitive [Ca2+]i (intracellular Ca2+ concentration) oscillations, with a period of 1-4 min, which persisted for the duration of recording (20-30 min). Pretreatment with nifedipine, which bl...
متن کاملPatterns of Intracellular Calcium Oscillations in Horse Oocytes Fertilized by Intracytoplasmic Sperm Injection
In all species studied, fertilization induces intracellular Ca ([Ca]i) oscillations required for oocyte activation and embryonic development. This species-specific pattern has not been studied in the equine, partly due to the difficulties linked to in vitro fertilization in this species. Therefore, the objective of this study was to use intracytoplasmic sperm injection (ICSI) to investigate fer...
متن کاملSpontaneous cytosolic calcium oscillations driven by inositol trisphosphate occur during in vitro maturation of mouse oocytes.
Immature mouse oocytes undergo spontaneous meiotic maturation when released from antral follicles into culture media. The first sign of meiotic resumption is germinal vesicle breakdown (GVB). Cytosolic free Ca2+ was measured in mouse oocytes during spontaneous maturation by monitoring fluorescence of indo-1 or fluo-3. The majority of oocytes showed a series of Ca2+ oscillations that continued f...
متن کاملIntracellular calcium oscillations and activation in horse oocytes injected with stallion sperm extracts or spermatozoa.
In oocytes from all mammalian species studied to date, fertilization by a spermatozoon induces intracellular calcium ([Ca(2+)](i)) oscillations that are crucial for appropriate oocyte activation and embryonic development. Such patterns are species-specific and have not yet been elucidated in horses; it is also not known whether equine oocytes respond with transient [Ca(2+)](i) oscillations when...
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ژورنال
عنوان ژورنال: Molecular Human Reproduction
سال: 1996
ISSN: 1360-9947,1460-2407
DOI: 10.1093/molehr/2.6.388