Monica Reynoso-Prieto1, Margaret Takeda1, Akraporn Prakobphol1, Dominika Seidman1, Sarah Averbach2, Susan Fisher1, Karen Smith-McCune3. 1. Department of Obstetrics, Gynecology and Reproductive Sciences, University of California San Francisco, San Francisco, CA, USA. 2. Department of Obstetrics, Gynecology and Reproductive Sciences, University of California San Diego, San Diego, CA, USA. 3. Department of Obstetrics, Gynecology and Reproductive Sciences, University of California San Francisco, San Francisco, CA, USA. karen.mccune@ucsf.edu.
Abstract
OBJECTIVE: To understand glycosylation of endocervical proteins at different times throughout the menstrual cycle in naturally cycling women and in women using hormonal or non-hormonal contraceptive methods, in order to characterize biochemical fingerprints of favorable and unfavorable cervical mucus. DESIGN: Lectin/antibody-probed protein blot analysis of endocervical mucus samples collected onto ophthalmologic sponges (wicks) from two groups: a longitudinal cohort of naturally cycling women at three time points in their menstrual cycles (discovery cohort), and a cross-sectional cohort of women on hormonal or non-hormonal contraceptive methods (validation cohort). SETTING: Participants were recruited from the San Francisco Bay Area from 2010 to 2016. PATIENT(S): Women with regular cycles not using hormonal or intrauterine device (IUD) contraceptives were recruited for the longitudinal cohort (n = 8). Samples from women using levonorgestrel-containing combined oral contraceptives (n = 16), levonorgestrel containing IUDs (n = 14), copper IUDs (n = 17), depo-medroxyprogesterone acetate (DMPA) (n = 15), and controls (n = 13) were used for validation. INTERVENTION(S): None. MAIN OUTCOME MEASURE(S): Detection of specific glycosylation patterns on lectin/antibody probed protein blots. RESULT(S): Two lectins (Lens culinaris agglutinin and Lycopersicon esculentum [tomato lectin]), and the antibody MECA-79 demonstrated consistent cycle-dependent changes in protein binding. The glycan-binding patterns of the levonorgestrel-containing contraceptives were generally similar to each other and to those from women in the luteal phase. The DMPA samples showed slightly different binding patterns. CONCLUSION(S): We identified molecular signatures of unfavorable mucus from women in the luteal phase and on hormonal contraceptives. Further characterization of these biomarkers may be useful in contraceptive development and in evaluation of infertility.
OBJECTIVE: To understand glycosylation of endocervical proteins at different times throughout the menstrual cycle in naturally cycling women and in women using hormonal or non-hormonal contraceptive methods, in order to characterize biochemical fingerprints of favorable and unfavorable cervical mucus. DESIGN:Lectin/antibody-probed protein blot analysis of endocervical mucus samples collected onto ophthalmologic sponges (wicks) from two groups: a longitudinal cohort of naturally cycling women at three time points in their menstrual cycles (discovery cohort), and a cross-sectional cohort of women on hormonal or non-hormonal contraceptive methods (validation cohort). SETTING:Participants were recruited from the San Francisco Bay Area from 2010 to 2016. PATIENT(S): Women with regular cycles not using hormonal or intrauterine device (IUD) contraceptives were recruited for the longitudinal cohort (n = 8). Samples from women using levonorgestrel-containing combined oral contraceptives (n = 16), levonorgestrel containing IUDs (n = 14), copper IUDs (n = 17), depo-medroxyprogesterone acetate (DMPA) (n = 15), and controls (n = 13) were used for validation. INTERVENTION(S): None. MAIN OUTCOME MEASURE(S): Detection of specific glycosylation patterns on lectin/antibody probed protein blots. RESULT(S): Two lectins (Lens culinaris agglutinin and Lycopersicon esculentum [tomatolectin]), and the antibody MECA-79 demonstrated consistent cycle-dependent changes in protein binding. The glycan-binding patterns of the levonorgestrel-containing contraceptives were generally similar to each other and to those from women in the luteal phase. The DMPA samples showed slightly different binding patterns. CONCLUSION(S): We identified molecular signatures of unfavorable mucus from women in the luteal phase and on hormonal contraceptives. Further characterization of these biomarkers may be useful in contraceptive development and in evaluation of infertility.
Entities:
Keywords:
Cervical glycans; Cervical glycome; Cervical wicks; Endocervical fluid; Fertile window; Glycosylation of endocervical proteins; Lectin blots
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