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Melani D, Ranaldi F, Giachetti E, Vanni P. A review of human cervical mucus enzymes. ACTA EUROPAEA FERTILITATIS 1991; 22:305-13. [PMID: 1844191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Xiang H, Han Z, Xie S, Liang Z, Li S, Wang H. [Preliminary study of cervicovaginal peroxidase as indicator for ovulation]. HUA XI YI KE DA XUE XUE BAO = JOURNAL OF WEST CHINA UNIVERSITY OF MEDICAL SCIENCES = HUAXI YIKE DAXUE XUEBAO 1991; 22:329-31. [PMID: 1660849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The study was designed to determine whether the change in the pattern of cervicovaginal peroxidase activity in the fertile period of women can serve as a basis for the development of a technique to predict ovulation time in natural family planning. Eight healthy women volunteered for this study in Chengdu area. The samples of cervical mucus and vaginal secretion were collected. The specific G-Px activity was measured with reference to the procedure of Tsibris, et al., on days 6, 8, 10, 12 through 16, 18, 20, 22, 24 of each menstrual cycle; at the same time an antecubital venous blood sample was drawn to be analyzed for levels of LH, FSH, E2, and P by RIA. The data showed that in 7 ovulatory cycles the G-Px activity did not vary regularly in vaginal secretion but it did drop rapidly in cervical mucus 2 or 3 days before ovulation time and it rose again one day after ovulation. The results suggest that the measurement of the G-Px activity in cervical mucus can be used to predict ovulation by two to three days before the time.
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Kanayama N, Terao T. The relationship between granulocyte elastase-like activity of cervical mucus and cervical maturation. Acta Obstet Gynecol Scand 1991; 70:29-34. [PMID: 1858492 DOI: 10.3109/00016349109006174] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Granulocyte elastase (elastase)-like activity in 119 samples of cervical mucus from pregnant women was measured. Though elastase-like activity in normal pregnant women was low in 2nd and 3rd trimesters (less than 20 units), it increased during labor (1st stage of labor: 70 +/- 50 U/l; 2nd stage: 72 +/- 56). Elastase-like activity in pregnant women with imminent premature delivery (24-30 gestational weeks) was also high (78 +/- 57). Elastase-like activity of cervical mucus correlated with Bishop score in both normal term and preterm labor. Elastase-containing granulocytes were identified by immunohistochemistry in ripened cervix in normal and preterm labor. Some granulocytes degranulate and release elastase into the cervical stroma. Others migrate through the basement membrane of the endocervix to reach the cervical canal. Elastase could not be demonstrated in immature cervix as assessed by Bishop score. The staining intensity of elastase in the cervix correlated closely with elastase-like activity in cervical mucus. Thus elastase-like activity in cervical mucus reflects the degree of cervical maturation. These results lead one to speculate that elastase is one of the neutral proteases which depolymerize and degrade collagen in the ripening cervix.
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Giachetti E, Vanni P, Tedesco R, Bardazzi F, Cattaneo A, Ogier E. Human cervical mucus: its enzymes. ACTA EUROPAEA FERTILITATIS 1991; 22:17-9. [PMID: 1746201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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30
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Iantomasi T, Giacchetti E, Vanni P, Tedesco R, Cattaneo A, Bardazzi F, Ogier E, Livi C, Scarselli G. Enzymes of human cervical mucus: a comparative study on fertile and infertile mucus and on the endocervical epithelium. ACTA EUROPAEA FERTILITATIS 1989; 20:151-5. [PMID: 2624070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
We report a comparative study on protein and enzyme content of human periovulatory cervical mucus and endocervical epithelium. The salient results of our investigation are summarized in the following three points: 1) The method of taking of cervical mucus samples may markedly affect the results of protein and enzyme assays. It is warmly advisable to collect mucus samples from the endocervical canal. 2) Cervical mucus from women diagnosed as having cervical-factor infertility is oligoproteic and lacks some enzyme activities always present in normal cases. 3) Human cervical mucus and endocervical epithelium are very similar as for the enzyme distribution, but show quite different LDH-isoenzyme patterns. In the latter tissue, the H subunits constitute about 77 per cent of the whole LDH, suggesting that this enzyme here is functioning to produce pyruvate rather than lactate.
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31
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Matuszewski W, Cieślar G, Horak S. [Diagnostic value of peroxidase in gynecology, obstetrics and gynecological endocrinology]. POLSKI TYGODNIK LEKARSKI (WARSAW, POLAND : 1960) 1987; 42:1163-6. [PMID: 2829146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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32
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Bhowmik T, Mukherjea M. Alterations in protein, sialic acid and some enzymes in cervical mucus of female rats during NET-EN treatment. Contraception 1987; 36:227-37. [PMID: 2448083 DOI: 10.1016/0010-7824(87)90018-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The effect of norethisterone enanthate (NET-EN) on cervical mucus protein, sialic acid and some enzymes (e.g. peroxidase, alkaline phosphatase and alpha-amylase) were studied in adult female rats. One mg NET-EN every 12 days was found to be an effective contraceptive dose of this drug in this species, acting primarily through the cervical mucus. NET-EN produced a highly significant increase in protein content and peroxidase and alkaline phosphatase activities. However, sialic acid content and amylase activity did not exhibit any definite pattern after NET-EN therapy. The increased protein content together with persistent elevated levels of peroxidase and alkaline phosphatase corroborates the hypothesis that NET-EN creates a progestogenic phase which prevents sperm penetration and thus conception.
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McLaughlin PJ, Warne PH, Hutchinson GE, Johnson PM, Tucker DF. Placental-type alkaline phosphatase in cervical neoplasia. Br J Cancer 1987; 55:197-201. [PMID: 3028462 PMCID: PMC2002092 DOI: 10.1038/bjc.1987.37] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Monoclonal antibodies reactive with placental-type alkaline phosphatase have formed the basis of methods for detection of this oncodevelopmental antigen in patients with pre-invasive and invasive cervical neoplasia, with or without evidence of papilloma virus infection. Disease-related elevations of placental-type alkaline phosphatase were not observed in patients' sera. Solubilised cervical smears or biopsy material, and cervical mucus swabs, often contained substantial amounts of this isoenzyme; however, there was no significant difference between any of the patient and control groups. Thus, serological and smear test assays for placental-type alkaline phosphatase were not useful in differential diagnosis of cervical lesions. However, its presence in most biopsy specimens, often at high levels, indicated possible application for in vivo radioimmunoimaging studies of invasive or metastatic cervical cancer.
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Tsibris JC, Virgin SD, Khan-Dawood FS, Langenberg PW, Thomason JL, Spellacy WN. Cervicovaginal peroxidases: markers of the fertile period. Obstet Gynecol 1986; 67:316-20. [PMID: 3003635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The specific activity of guaiacol peroxidase was measured daily in human cervical mucus, vaginal fluids, and saliva during 45 cycles in 31 women. Also determined were basal body temperatures and serum hormones (luteinizing hormone [LH], estradiol, progesterone). The guaiacol peroxidase was extracted with 0.5 M CaCl2 and thus may be a different peroxidase from that obtained by noncalcium extraction procedures. The guaiacol peroxidase specific activity did not vary in the saliva during the cycle but fell sharply in the cervical mucus and vaginal fluid four to five days before the ovulation time, estimated by the LH peak, and rose again one to two days after ovulation. Anovulatory cycles did not show the midcycle drop in guaiacol peroxidase. Growth curve analysis gave excellent fitting of the guaiacol peroxidase data to a polynominal model. These data suggest that cervicovaginal guaiacol peroxidase may be clinically useful in detecting the fertile period for population control and for infertility treatment.
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Treves C, Vincenzini MT, Vanni P, Bardazzi F, Cattaneo A, Ogier E. Changes in enzyme levels in human cervical mucus during the menstrual cycle. INTERNATIONAL JOURNAL OF FERTILITY 1986; 31:59-66. [PMID: 2908278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Cervical mucus is a complex secretion produced by the endocervical epithelium. A comparative analysis of 30 enzymes was carried out on 15 women during their periovulatory period (days 10 to 16 of the menstrual cycle). Nine different enzymes were always found to be present in the cervical mucus. Changes in enzymatic activity were further studied in two of the women, one with a normal (27-day) and the other with a short (20-day) menstrual cycle. The data were compared with those for the same enzymes in the saliva of these two women. Each woman's ovulation time was determined through hormone measurements in urine and blood, as well as by recording basal body temperature and by Billing's method. Our results indicate that a maximum peak occurs for several enzymes during the periovulatory period.
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36
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Fabiani L, Vincenzini MT, Treves C, Vanni P, Cattaneo A, Bardazzi F, Ogier E. Some molecular features of human cervical mucus. ACTA EUROPAEA FERTILITATIS 1985; 16:111-5. [PMID: 4036510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
1) The time preservation effect of the enzymatic activities present in human cervical mucus has been studied. 2) In order to protect the enzymatic activities of the mucus from bacterial impurities, the enzymes studied were assayed in presence of NaN3. 3) The effect of an acid pH likes present in the vagina was also studied: a low pH exerts a marked inhibition on mucus enzymes. 4) the use of nonionic detergents for mucus solubilization does not produce a marked increase of the enzymatic activities studied. 5) A NADP-dependent malate dehydrogenase in peri- and post-ovulatory period has been identified. 6) The presence in mucus of at least four lactate dehydrogenase isoenzymes has been demonstrated and their absolute values determined.
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Horbach L, Hilgarth M, Melchert F, Stegner HE. [Diagnostic value of increased lactate dehydrogenase activity in vaginal secretions for the early detection of diseases requiring treatment of the female genitals and breast]. Geburtshilfe Frauenheilkd 1984; 44:627-35. [PMID: 6569843 DOI: 10.1055/s-2008-1036320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Abstract
The Diagnostic Validity of Enhanced Lactate Dehydrogenase Activity in the Vaginal Secretion for Early Diagnosis of Diseases of the Female Genitals and the Mamma in Need of Treatment. An impregnated hygiene tampon (Gynaegnost) was used, which by a colour reaction permits the determination of augmented activity of lactate dehydrogenase (LDH) in vaginal secretion. The diagnostic validity of the results of the findings by this method in the detection of diseases of the female genitals and the mamma needing treatment was examined in two clinical diagnostic studies. The first study including 486 patients chiefly suffering from manifest carcinoma was aimed at solving a deliberately limited question. In patients with carcinoma stages I to IV of the most important genital locations augmented LDH-activity (correct positive results) was found in about 90%. A second study comprised 1955 women entering into outpatient gynaecological services for preventive examination; the definition of this series was difficult. Three categories of diagnostic groups can be determined by the results of this study. In the first category with the most important subgroup "routine examination without specification of a pathological finding" less than 20% "false" positive test results by the indicator were observed. A second category with inflammatory diseases (colpitis, endometritis) showed positive results in about one-third of the examinations. The third category comprised a minor number of malignant tumors roughly with a percentage of positive results corresponding to that of the first study. Augmented LDH activity in vaginal secretion is a diagnostic criterion which detects not only cancer; it is similar to the test of occult blood in faeces.(ABSTRACT TRUNCATED AT 250 WORDS)
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Molnárová M, Arendarcik J, Molnár P. [The effect of prolonged whole-body gamma irradiation of 6,7 Gy and 4,8 Gy (700 and 500 R) on the trypsin inhibiting activity (TIA) of blood, the cervical mucus and the morphological structure of the cervix in ewes]. VET MED-CZECH 1984; 29:549-62. [PMID: 6438870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
The pattern of changes in the trypsin-inhibition activities (TIA) of blood plasma, cervical mucus and in the morphological structure of cervix was studied in ewes exposed to 60Co radiation for seven and five days, the radiation doses being 6.7 Gy and 4.8 Gy (700 and 500 R). During exposure, the group of ewes irradiated with 4.8 Gy was given the Roboran vitamin premix in addition to standard feed. After termination of irradiation the animals in this trial were given the ampicillin antibiotic (5250 mg). TIA was determined from the retardation of the hydrolysis of the synthetic substrate N-alpha-tosyl-p-nitroanilide (TAPA) by bovine trypsin; the TIA was expressed as the percentage of inhibited trypsin. As found on the day of the termination of irradiation, almost all the studied TIA values of blood plasma and cervical mucus were increased in the irradiated animals, the range being from 103.1 to 155.0% of the levels for non-irradiated ewes. A reduction was recorded only in total TIA of blood plasma in the group irradiated with the dose of 6.7 Gy (83.1% of the values for non-irradiated animals). In the group of animals irradiated with 4.8 Gy and fed no Roboran, the TIA of cervical mucus was observed to decrease to 92.4%. When evaluating the average TIA of different test groups throughout the experiment it was found that all the studied TIA values of the irradiated animals increased within a range from 104.1 to 184.0% of the values for untreated ewes. It was only in the average values of total TIA in blood plasma that, after irradiation with 6.7 Gy, a decrease to 92.7% of the level without irradiation was recorded. It was found during the study of changes in the proportions of glands in the stroma and changes in epithelium thickness in the mucous membrane of cervix uteri that the irradiated ewes had the epithelium thickness reduced to 95.3%-65.5% and that their stromal gland number decreased to 75.4%-79.7% of that recorded in non-irradiated animals. It was only in the group given a Roboran supplement that an increase to 123.7% of the gland number for untreated ewes was recorded on the tenth day after the termination of irradiation.
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Anderson WA, Ahluwalia BS, Westney LS, Burnett CC, Rüchel R. Cervical mucus peroxidase is a reliable indicator for ovulation in humans. Fertil Steril 1984; 41:697-702. [PMID: 6325254 DOI: 10.1016/s0015-0282(16)47834-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
This study was designed to establish whether fluctuation in cervical mucus peroxidase concentration correlates with the cyclic pattern of the menstrual cycle hormones in the human female. Forty healthy, normal-cycling women between the ages of 19 and 29 years were chosen for the study. Blood samples and cervical mucus were collected on days 6, 9 through 15, and 17 through 19 of the menstrual cycle for three consecutive cycles in each volunteer. Blood estrogen, progesterone, follicle-stimulating hormone, and luteinizing hormone levels were quantitated by radioimmunoassay, and cervical mucus peroxidase concentrations were measured spectrophotometrically. The data showed that in the typical menstrual cycle the mucus peroxidase peak was reached immediately prior to the luteinizing hormone/follicle-stimulating hormone surge and coincided with the estrogen peak. Consistent data in three consecutive menstrual cycles in each volunteer led us to postulate that the mucus peroxidase peak during the menstrual cycle precedes the ovulatory period in the normal healthy woman.
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Singh PP, Gupta RC. Isomerase in cervical mucus. Fertil Steril 1982; 37:280. [PMID: 7060777 DOI: 10.1016/s0015-0282(16)46055-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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41
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Tsibris JC, Thomason JL, Kunigk A, Khan-Dawood FS, Kirschner CV, Spellacy WN. Guaiacol peroxidase levels in human cervical mucus: a possible predictor of ovulation. Contraception 1982; 25:59-67. [PMID: 6277563 DOI: 10.1016/0010-7824(82)90019-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Paulesu L, Pessina GP. Cyclic changes of sialidase in human cervical mucus. THE INTERNATIONAL JOURNAL OF BIOCHEMISTRY 1982; 14:561-3. [PMID: 7106355 DOI: 10.1016/0020-711x(82)90035-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
1. Sialidase activity is detectable in whole cervical mucus of normal women throughout the menstrual cycle and presents cyclic variations toward endogenous and exogenous substrates. 2. The level of sialic acid bound to the mucus increases progressively till mid-cycle and declines in the post-ovulatory phase. 3. The sialidase of the mucus probably derives from different sources and its role remains speculative.
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Scudder PR, Chantler EN. Control of human cervical mucin glycosylation by endogenous fucosyl and sialyltransferases. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 1982; 144:265-7. [PMID: 7080919 DOI: 10.1007/978-1-4615-9254-9_40] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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44
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Foulkes JA, Hartley PE, Stewart DL. Bovine cervical mucus peroxidase concentrations at oestrus. Res Vet Sci 1981; 30:14-7. [PMID: 7195602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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45
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Starostina ZD, Kuntsevich LD. [Lysozyme activity of the blood serum and cervical canal mucus in gonorrhea]. VESTNIK DERMATOLOGII I VENEROLOGII 1980:69-71. [PMID: 7003971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
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Prasad A, Bachlaus NK, Arora RC, Pandey RS. Protein concentration, phosphatases & peroxidase in cervical mucus of buffalo heifers during oestrous cycle. INDIAN JOURNAL OF EXPERIMENTAL BIOLOGY 1980; 18:251-3. [PMID: 7190130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Takehisa T. Lactate dehydrogenase in human cervical mucus: correlation with ovulation, influence of ovarian steroid hormones, and isozyme pattern. Fertil Steril 1980; 33:135-40. [PMID: 7353690 DOI: 10.1016/s0015-0282(16)44533-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The glycolytic enzymes, lactate dehydrogenase (LDH), glucose-6-phosphate dehydrogenase, and hexokinase in cervical mucus of 96 ovulatory women were serially measured daily during the menstrual cycle. Among all of the enzymes, the cyclic changes in LDH activity were the most significant, being high during the proliferative phase, gradually decreasing to the lowest level around ovulation, and then increasing markedly again. Estrogen inhibited cervical mucus LDH activity; progestrone accelerated it. Examination of the LDH isozyme pattern showed that H-LDH (H-subunit of LDH), being predominant throughout the cycle, apparently carries some responsibility for the cyclic change in LDH activity. In a comparison of LDH activity with the serum luteinizing hormone (LH) peak, the activity level nadir of LDH usually appeared between 1 day before and 1 day after the serum LH peak, pointing to the advantage of daily measurement of cervical mucus LDH activity for predicting the potential day of conception.
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Abstract
Postcoital tests (PCTs) were conducted following artificial insemination with either live or dead spermatozoa. The cervical mucus samples were analyzed for sperm counts and acid phosphatase activity. The results indicate that the final distribution of mucus and sperm in the PCT sampling catheter is not truly representative of their original distribution within the cervix. Moreover, PCTs done after insemination with semen containing only dead sperm yield unrealistically high sperm counts and high cervical mucus acid phosphatase levels. This is apparently due to the translocation of semen from the area of the external os into the mucus sample by the sampling catheter. This problem can be largely prevented by removing a plug of mucus from the external os prior to the catheter sampling procedure.
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Tang BY, Adams NR. Enzyme activities and protein and carbohydrate concentrations in cervical secretions at dioestrus in normal ewes and ewes with permanent phytooestrogenic infertility. AUSTRALIAN JOURNAL OF BIOLOGICAL SCIENCES 1978; 31:241-6. [PMID: 569472 DOI: 10.1071/bi9780241] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Cervical secretions of clover-affected and control ewes in the luteal phase of the ovarian cycle were obtained by flushing the anterior vagina. The flushings were analysed for proteins, carbohydrates and enzyme activities, and were found to be similar to the secretions of the normal ovine uterus. There was significantly more protein, carbohydrate and acid-soluble glycoprotein but less alkaline phosphatase, N-acetylglycosidases (EC 3.2.1.30 and 3.2.1.53) and ribonuclease I in the vaginal flushings of clover-affected ewes. The observed changes were not due to more inflammation in the cervix of clover-affected ewes as there were fewer bacteria, leukocytes and epithelial cells and no elevation of lysozomal enzyme activities in their flushings. It is suggested that the cervix of the clover-affected ewe behaves as though under a stronger than normal oestrogenic stimulation during dioestrus.
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Agrawal SC, Datta IC. Carbohydrate components & alkaline phosphatase activity in cervical mucus of cows & buffalo at estrus. INDIAN JOURNAL OF EXPERIMENTAL BIOLOGY 1978; 16:388-90. [PMID: 567186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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