Biomaterial Database

Elevated tissue levels of collagenase during dilation of uterine cervix in human parturition. 1988

M R Rajabi, and D D Dean, and S N Beydoun, and J F Woessner

Department of Obstetrics and Gynecology, University of Miami School of Medicine, FL 33101.

Seven biopsy specimens from the cervix and 17 from the lower uterine segment were obtained in 24 women at term (37 to 42 weeks). Collagenase was extracted and assayed on telopeptide-free [3H]collagen; typical collagen cleavage products were found on sodium dodecyl sulfate-gel electrophoresis. There was no significant difference between collagenase levels in the cervix and in the lower uterine segment in women not in labor and with the cervix closed. Levels of active and latent collagenase in 11 such specimens were 0.14 +/- 0.03 and 0.64 +/- 0.90 U/gm wet weight, respectively (mean +/- SEM; 1 U = 1 micrograms collagen digested per minute at 30 degrees C). Thirteen women at term in active labor with cervical dilation of 4 to 8 cm exhibited a thirteenfold increase in mean collagenase activity in the lower uterine segment. Active and latent collagenase increased to 2.06 +/- 0.92 and 8.64 +/- 2.87 U/gm, respectively. This is the first direct evidence that interstitial collagenase increases markedly during cervical dilation in human parturition.

UI	MeSH Term	Description	Entries
D007743	Labor, Obstetric	The repetitive uterine contraction during childbirth which is associated with the progressive dilation of the uterine cervix (CERVIX UTERI). Successful labor results in the expulsion of the FETUS and PLACENTA. Obstetric labor can be spontaneous or induced (LABOR, INDUCED).	Obstetric Labor
D011247	Pregnancy	The status during which female mammals carry their developing young (EMBRYOS or FETUSES) in utero before birth, beginning from FERTILIZATION to BIRTH.	Gestation,Pregnancies
D002584	Cervix Uteri	The neck portion of the UTERUS between the lower isthmus and the VAGINA forming the cervical canal.	Cervical Canal of the Uterus,Cervical Canal, Uterine,Ectocervix,Endocervical Canal,Endocervix,External Os Cervix,External Os of the Cervix,Uterine Cervical Canal,Cervix,Cervixes,Uterine Cervix,Canal, Endocervical,Canal, Uterine Cervical,Cervix, External Os,Cervix, Uterine,Endocervical Canals,Uterine Cervical Canals
D002850	Chromatography, Gel	Chromatography on non-ionic gels without regard to the mechanism of solute discrimination.	Chromatography, Exclusion,Chromatography, Gel Permeation,Chromatography, Molecular Sieve,Gel Filtration,Gel Filtration Chromatography,Chromatography, Size Exclusion,Exclusion Chromatography,Gel Chromatography,Gel Permeation Chromatography,Molecular Sieve Chromatography,Chromatography, Gel Filtration,Exclusion Chromatography, Size,Filtration Chromatography, Gel,Filtration, Gel,Sieve Chromatography, Molecular,Size Exclusion Chromatography
D003012	Microbial Collagenase	A metalloproteinase which degrades helical regions of native collagen to small fragments. Preferred cleavage is -Gly in the sequence -Pro-Xaa-Gly-Pro-. Six forms (or 2 classes) have been isolated from Clostridium histolyticum that are immunologically cross-reactive but possess different sequences and different specificities. Other variants have been isolated from Bacillus cereus, Empedobacter collagenolyticum, Pseudomonas marinoglutinosa, and species of Vibrio and Streptomyces. EC 3.4.24.3.	Clostridiopeptidase A,Clostridium histolyticum Collagenase,Collagenase, Microbial,Collagenase Clostridium histolyticum,Collagenase-Like Peptidase,Collalysine,Nucleolysin,Clostridium histolyticum, Collagenase,Collagenase Like Peptidase,Collagenase, Clostridium histolyticum,Peptidase, Collagenase-Like,histolyticum, Collagenase Clostridium
D004591	Electrophoresis, Polyacrylamide Gel	Electrophoresis in which a polyacrylamide gel is used as the diffusion medium.	Polyacrylamide Gel Electrophoresis,SDS-PAGE,Sodium Dodecyl Sulfate-PAGE,Gel Electrophoresis, Polyacrylamide,SDS PAGE,Sodium Dodecyl Sulfate PAGE,Sodium Dodecyl Sulfate-PAGEs
D005260	Female		Females
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D014599	Uterus	The hollow thick-walled muscular organ in the female PELVIS. It consists of the fundus which is the site of EMBRYO IMPLANTATION and FETAL DEVELOPMENT. Beyond the isthmus at the perineal end of fundus, is CERVIX UTERI (the neck) opening into VAGINA. Beyond the isthmi at the upper abdominal end of fundus, are the FALLOPIAN TUBES.	Fundus Uteri,Uteri,Uterine Cornua,Uterine Fundus,Uterus Cornua,Womb,Cornua, Uterine,Fundus Uterus,Fundus, Uterine,Uteri, Fundus,Wombs
D066298	In Vitro Techniques	Methods to study reactions or processes taking place in an artificial environment outside the living organism.	In Vitro Test,In Vitro Testing,In Vitro Tests,In Vitro as Topic,In Vitro,In Vitro Technique,In Vitro Testings,Technique, In Vitro,Techniques, In Vitro,Test, In Vitro,Testing, In Vitro,Testings, In Vitro,Tests, In Vitro,Vitro Testing, In