capacitation


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Related to capacitation: Acrosome reaction

capacitation

 [kah-pas″ĭta´shun]
the process by which the glycoprotein coat and the seminal proteins are removed from the surface of the sperm's acrosome by substances secreted by the uterus or fallopian tubes of the female genital tract, thereby permitting the acrosome reaction to occur.

ca·pac·i·ta·tion

(kă-pas'i-tā'shŭn),
Capacitation is a process whereby the glycoprotein coat is modified and seminal proteins are removed from the surface of the sperm. There are no morphologic changes. Capacitation also occurs in in vitro fertilization; after capacitation, the acrosomal reaction can occur.
[L. capacitas, fr. capax, capable of]

capacitation

/ca·pac·i·ta·tion/ (kah-pas″ĭ-ta´shun) the process by which spermatozoa in the ampullary portion of a uterine tube become capable of going through the acrosome reaction and fertilizing an oocyte.

capacitation

[kəpas′itā′shən]
the process in which the spermatozoon, after it reaches the ampulla of the fallopian tube, undergoes a series of changes that lead to its ability to fertilize an ovum.

capacitation

A biochemical event in mammals that consists of the post-ejaculation maturation of sperm, which are capable of penetrating the zona pellucida and fertilising an oocyte. Capacitation is due to exposure to secretions—sterol binding albumin, lipoproteins, proteases and glycosidases—in the uterus, and requires the correct concentration of the tripeptide fertilisation promoting peptide, which is present in seminal fluid. Capacitation destabilises the acrosomal sperm-head membrane, facilitating binding of a sperm to the oocyte by removing steroids (e.g., cholesterol) and non-covalently bound seminal glycoprotein; the process is reversible and includes all of the events up to the acrosome reaction, which is irreversible.

capacitation

Reproductive medicine The postrelease maturation in sperm, which are capable of penetrating the zona pellucida and fertilizing an oocyte after exposure to secretions in the ♀ genital tract. Cf Acrosome reaction.

ca·pac·i·ta·tion

(kă-pas'i-tā'shŭn)
A conditioning process whereby the glycoprotein coat and seminal proteins are removed from the acrosome of a sperm. After capacitation has occurred, perforations develop in the acrosome.
[L. capacitas, fr. capax, capable of]

capacitation

changes occurring in SPERM while inside the female reproductive tract, where the acidic environment causes alterations to the cell membrane of the sperm that make possible its adhesion to the secondary OOCYTE.

capacitation

the physiological changes the spermatozoa must undergo in the female tract or in vitro before being capable of penetrating the ovum.
References in periodicals archive ?
Decrease in order of human sperm lipids during capacitation.
Experimental design (4), effects of gestational BPA on testicular seminiferous epithelial cells (B-D), and capacitation status (E-G) of F1 mice.
Serum albumin and sodium bicarbonate can induce sperm capacitation during in vitro culturing of spermatozoa [1, 13].
Sperm capacitation removes the outer layer around the sperm, helps it travel to the fallopian tube, and allows the sperm to penetrate and fertilize the egg.
The process of invitro capacitation of spermatozoacan be achieved by adding an appropriate medium [8].
This ability is normally acquired by the sperm cells as they pass through the epididymis through maturation process and within the female genitalia through the process of capacitation.
Washed sperms were incubated to effect capacitation.
This fact might also be related to the acquired capacitation of these spermatozoa after three hours, which was absent at time zero (T = 0).
We remain positive that this national capacitation exercise will tremendously assist Namibia to have a robust national money laundering, and terrorism framework in place.
Chang (6) reported that capacitation can be induced in vitro under specific culture medium conditions.
Semenogelin I inhibits the motility of intact and demembraned spermatozoa and participates in the capacitation of sperm by blocking motility immediately after ejaculation (5).