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Gonzalez TL, Wertheimer S, Flowers AE, Wang Y, Santiskulvong C, Clark EL, Jefferies CA, Lawrenson K, Chan JL, Joshi NV, Zhu Y, Tseng HR, Karumanchi SA, Williams III J, Pisarska MD. High-throughput mRNA-seq atlas of human placenta shows vast transcriptome remodeling from first to third trimester†. Biol Reprod 2024; 110:936-949. [PMID: 38271627 PMCID: PMC11094392 DOI: 10.1093/biolre/ioae007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 12/15/2023] [Accepted: 01/02/2024] [Indexed: 01/27/2024] Open
Abstract
The placenta, composed of chorionic villi, changes dramatically across gestation. Understanding differences in ongoing pregnancies are essential to identify the role of chorionic villi at specific times in gestation and develop biomarkers and prognostic indicators of maternal-fetal health. The normative mRNA profile is established using next-generation sequencing of 124 first trimester and 43 third trimester human placentas from ongoing healthy pregnancies. Stably expressed genes (SEGs) not different between trimesters and with low variability are identified. Differential expression analysis of first versus third trimester adjusted for fetal sex is performed, followed by a subanalysis with 23 matched pregnancies to control for subject variability using the same genetic and environmental background. Placenta expresses 14,979 polyadenylated genes above sequencing noise (transcripts per million > 0.66), with 10.7% SEGs across gestation. Differentially expressed genes (DEGs) account for 86.7% of genes in the full cohort [false discovery rate (FDR) < 0.05]. Fold changes highly correlate between the full cohort and subanalysis (Pearson = 0.98). At stricter thresholds (FDR < 0.001, fold change > 1.5), there remains 50.1% DEGs (3353 upregulated in first and 4155 upregulated in third trimester). This is the largest mRNA atlas of healthy human placenta across gestation, controlling for genetic and environmental factors, demonstrating substantial changes from first to third trimester in chorionic villi. Specific differences and SEGs may be used to understand the specific role of the chorionic villi throughout gestation and develop first trimester biomarkers of placental health that transpire across gestation, which can be used for future development of biomarkers for maternal-fetal health.
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Affiliation(s)
- Tania L Gonzalez
- Department of Obstetrics and Gynecology, Center for Reproductive Medicine, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Sahar Wertheimer
- Department of Obstetrics and Gynecology, Center for Reproductive Medicine, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Amy E Flowers
- Department of Obstetrics and Gynecology, Center for Reproductive Medicine, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Yizhou Wang
- Department of Computational Biomedicine, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Chintda Santiskulvong
- CS Cancer Applied Genomics Shared Resource, CS Cancer, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Ekaterina L Clark
- Department of Obstetrics and Gynecology, Center for Reproductive Medicine, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Caroline A Jefferies
- Division of Rheumatology, Department of Medicine, Kao Autoimmune Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Kate Lawrenson
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, CA, USA
- Center for Bioinformatics and Functional Genomics, Samuel Oschin Comprehensive Cancer Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA
- Women’s Cancer Research Program, Samuel Oschin Comprehensive Cancer Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Jessica L Chan
- Department of Obstetrics and Gynecology, Center for Reproductive Medicine, Cedars-Sinai Medical Center, Los Angeles, CA, USA
- David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, USA
| | - Nikhil V Joshi
- Department of Obstetrics and Gynecology, Center for Reproductive Medicine, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Yazhen Zhu
- David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, USA
- California NanoSystems Institute, Crump Institute for Molecular Imaging, Department of Molecular and Medical Pharmacology, University of California, Los Angeles, Los Angeles, CA, USA
| | - Hsian-Rong Tseng
- California NanoSystems Institute, Crump Institute for Molecular Imaging, Department of Molecular and Medical Pharmacology, University of California, Los Angeles, Los Angeles, CA, USA
| | | | - John Williams III
- David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, USA
- Department of Obstetrics and Gynecology, Division of Maternal-Fetal Medicine, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Margareta D Pisarska
- Department of Obstetrics and Gynecology, Center for Reproductive Medicine, Cedars-Sinai Medical Center, Los Angeles, CA, USA
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA, USA
- David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, USA
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Sweterlitsch KM, VanHise KL, Konate N, Willson BE, Pisarska MD, Wang ET, Chan JL. A cross-sectional assessment of YouTube as a source of information on diet and supplements for polycystic ovary syndrome. Fertil Steril 2024; 121:884-886. [PMID: 38378105 DOI: 10.1016/j.fertnstert.2024.02.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 02/07/2024] [Accepted: 02/13/2024] [Indexed: 02/22/2024]
Affiliation(s)
| | - Katherine L VanHise
- Department of Obstetrics and Gynecology, Cedars Sinai Medical Center, Los Angeles, California
| | - Ndeye Konate
- Department of Obstetrics and Gynecology, Cedars Sinai Medical Center, Los Angeles, California
| | - Bryn E Willson
- Department of Obstetrics and Gynecology, Cedars Sinai Medical Center, Los Angeles, California
| | - Margareta D Pisarska
- Department of Obstetrics and Gynecology, Cedars Sinai Medical Center, Los Angeles, California
| | - Erica T Wang
- Department of Obstetrics and Gynecology, Cedars Sinai Medical Center, Los Angeles, California
| | - Jessica L Chan
- Department of Obstetrics and Gynecology, Cedars Sinai Medical Center, Los Angeles, California
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Flowers AE, Gonzalez TL, Wang Y, Santiskulvong C, Clark EL, Novoa A, Jefferies CA, Lawrenson K, Chan JL, Joshi NV, Zhu Y, Tseng HR, Wang ET, Ishimori M, Karumanchi SA, Williams J, Pisarska MD. High-throughput mRNA sequencing of human placenta shows sex differences across gestation. Placenta 2024; 150:8-21. [PMID: 38537412 DOI: 10.1016/j.placenta.2024.03.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 03/07/2024] [Accepted: 03/09/2024] [Indexed: 05/04/2024]
Abstract
INTRODUCTION Fetal sex affects fetal and maternal health outcomes in pregnancy, but this connection remains poorly understood. As the placenta is the route of fetomaternal communication and derives from the fetal genome, placental gene expression sex differences may explain these outcomes. OBJECTIVES We utilized next generation sequencing to study the normal human placenta in both sexes in first and third trimester to generate a normative transcriptome based on sex and gestation. STUDY DESIGN We analyzed 124 first trimester (T1, 59 female and 65 male) and 43 third trimester (T3, 18 female and 25 male) samples for sex differences within each trimester and sex-specific gestational differences. RESULTS Placenta shows more significant sexual dimorphism in T1, with 94 T1 and 26 T3 differentially expressed genes (DEGs). The sex chromosomes contributed 60.6% of DEGs in T1 and 80.8% of DEGs in T3, excluding X/Y pseudoautosomal regions. There were 6 DEGs from the pseudoautosomal regions, only significant in T1 and all upregulated in males. The distribution of DEGs on the X chromosome suggests genes on Xp (the short arm) may be particularly important in placental sex differences. Dosage compensation analysis of X/Y homolog genes shows expression is primarily contributed by the X chromosome. In sex-specific analyses of first versus third trimester, there were 2815 DEGs common to both sexes upregulated in T1, and 3263 common DEGs upregulated in T3. There were 7 female-exclusive DEGs upregulated in T1, 15 female-exclusive DEGs upregulated in T3, 10 male-exclusive DEGs upregulated in T1, and 20 male-exclusive DEGs upregulated in T3. DISCUSSION This is the largest cohort of placentas across gestation from healthy pregnancies defining the normative sex dimorphic gene expression and sex common, sex specific and sex exclusive gene expression across gestation. The first trimester has the most sexually dimorphic transcripts, and the majority were upregulated in females compared to males in both trimesters. The short arm of the X chromosome and the pseudoautosomal region is particularly critical in defining sex differences in the first trimester placenta. As pregnancy is a dynamic state, sex specific DEGs across gestation may contribute to sex dimorphic changes in overall outcomes.
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Affiliation(s)
- Amy E Flowers
- Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, CA, 90048, USA
| | - Tania L Gonzalez
- Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, CA, 90048, USA
| | - Yizhou Wang
- Computational Biomedicine, Cedars-Sinai Medical Center, Los Angeles, CA, 90048, USA
| | - Chintda Santiskulvong
- CS Cancer Applied Genomics Shared Resource, CS Cancer, Cedars-Sinai Medical Center, Los Angeles, CA, 90048, USA
| | - Ekaterina L Clark
- Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, CA, 90048, USA
| | - Allynson Novoa
- Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, CA, 90048, USA
| | - Caroline A Jefferies
- Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA, 90048, USA; Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA, 90048, USA
| | - Kate Lawrenson
- Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, CA, 90048, USA; Samuel Oschin Comprehensive Cancer Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Jessica L Chan
- Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, CA, 90048, USA; David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Nikhil V Joshi
- Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, CA, 90048, USA
| | - Yazhen Zhu
- David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, 90095, USA; California NanoSystems Institute, Crump Institute for Molecular Imaging, Department of Molecular and Medical Pharmacology, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Hsian-Rong Tseng
- California NanoSystems Institute, Crump Institute for Molecular Imaging, Department of Molecular and Medical Pharmacology, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Erica T Wang
- Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, CA, 90048, USA; David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Mariko Ishimori
- Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA, 90048, USA
| | - S Ananth Karumanchi
- Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA, 90048, USA
| | - John Williams
- Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, CA, 90048, USA; David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Margareta D Pisarska
- Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, CA, 90048, USA; Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA, 90048, USA; David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, 90095, USA.
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Ezeh U, Chen YI, Pall M, Buyalos RP, Chan JL, Pisarska MD, Azziz R. Alterations in nonesterified free fatty acid trafficking rather than hyperandrogenism contribute to metabolic health in obese women with polycystic ovary syndrome. Fertil Steril 2024:S0015-0282(24)00033-5. [PMID: 38307453 DOI: 10.1016/j.fertnstert.2024.01.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 01/24/2024] [Accepted: 01/24/2024] [Indexed: 02/04/2024]
Abstract
OBJECTIVE To determine whether alterations in nonesterified fatty acid (NEFA) dynamics or degree of hyperandrogenism (HA) contribute to the difference in insulin sensitivity between women with metabolically healthy obese polycystic ovary syndrome (PCOS) (MHO-PCOS) and women with metabolically unhealthy obese PCOS (MUO-PCOS). DESIGN Prospective cross-sectional study. SETTING Tertiary-care academic center. PATIENTS One hundred twenty-five obese women with PCOS. INTERVENTION Consecutive obese (body mass index [BMI] ≥ 30 kg/m2) oligo-ovulatory women (n = 125) with PCOS underwent an oral glucose tolerance test and a subgroup of 16 participants underwent a modified frequently sampled intravenous glucose tolerance test to determine insulin-glucose and -NEFA dynamics. MAIN OUTCOME MEASURES Degree of insulin resistance (IR) in adipose tissue (AT) basally (Adipo-IR) and dynamically (the nadir in NEFA levels observed [NEFAnadir], the time it took for NEFA levels to reach nadir [TIMEnadir], and the percent suppression in plasma NEFA levels from baseline to nadir [%NEFAsupp]); peak lipolysis rate (SNEFA) and peak rate of NEFA disposal from plasma pool (KNEFA); whole-body insulin-glucose interaction (acute response of insulin to glucose [AIRg], insulin sensitivity index [Si], glucose effectiveness [Sg], and disposition index [Di]); and HA (hirsutism score, total and free testosterone levels, and dehydroepiandrosterone sulfate levels). RESULTS A total of 85 (68%) women were MUO-PCOS and 40 (32%) were MHO-PCOS using the homeostasis model of assessment of IR. Subjects with MUO-PCOS and MHO-PCOS did not differ in mean age, BMI, waist-to-hip ratio, HA, and lipoprotein levels. By a modified frequently sampled intravenous glucose tolerance test, eight women with MUO-PCOS had lesser Si, KNEFA, and the percent suppression in plasma NEFA levels from baseline to nadir (%NEFAsupp) and greater TIMEnadir, NEFAnadir, and baseline adipose tissue IR index (Adipo-IR) than eight subjects with MHO-PCOS, but similar fasting NEFA levels and SNEFA. Women with MUO-PCOS had a higher homeostasis model of assessment-β% and fasting insulin levels than women with MHO-PCOS. In bivalent analysis, Si correlated strongly and negatively with Adipo-IR and NEFAnadir, weakly and negatively with TIMEnadir, and positively with KNEFA and %NEFAsupp, in women with MUO-PCOS only. CONCLUSION Independent of age and BMI, women with MUO-PCOS have reduced NEFA uptake and altered insulin-mediated NEFA suppression, but no difference in HA, compared with women with MHO-PCOS. Altered insulin-mediated NEFA suppression, rather than HA or lipolysis rate, contributes to variations in insulin sensitivity among obese women with PCOS.
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Affiliation(s)
- Uche Ezeh
- California IVF Fertility Center, Sacramento, California; Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, California; Department of Obstetrics and Gynecology, Heersink School of Medicine, University of Alabama at Birmingham (UAB), Birmingham, Alabama; Department of Obstetrics and Gynecology, Alta Bates Summit Medical Center (Sutter), Berkeley, California
| | - Yd Ida Chen
- Department of Pediatrics and Medicine, Harbor- University of California (UCLA) Medical Center, Torrance, California; Department of Medicine, The David Geffen School of Medicine, UCLA, Los Angeles, California
| | - Marita Pall
- Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, California
| | - Richard P Buyalos
- Fertility and Surgical Associates of California, Thousand Oaks, California
| | - Jessica L Chan
- Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, California
| | - Margareta D Pisarska
- Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, California; Department of Obstetrics and Gynecology, UCLA, Los Angeles, California
| | - Ricardo Azziz
- Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, California; Department of Obstetrics and Gynecology, Heersink School of Medicine, University of Alabama at Birmingham (UAB), Birmingham, Alabama; Department of Medicine, Heersink School of Medicine, UAB, Birmingham, Alabama; Department of Healthcare Organization and Policy, School of Public Health, UAB, Birmingham, Alabama; Department of Health Policy, Management and Behavior, School of Public Health, State University of New York at Albany, Albany, New York.
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Schaub AM, Gonzalez TL, Dorfman AE, Novoa AG, Hussaini RA, Harakuni PM, Khan MH, Shabani BJ, Swarna A, Wang ET, Chan JL, Williams J, Pisarska MD. A systematic review of genome-wide analyses of methylation changes associated with assisted reproductive technologies in various tissues. Fertil Steril 2024; 121:80-94. [PMID: 37827482 DOI: 10.1016/j.fertnstert.2023.10.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 09/29/2023] [Accepted: 10/01/2023] [Indexed: 10/14/2023]
Abstract
IMPORTANCE Because analytic technologies improve, increasing amounts of data on methylation differences between assisted reproductive technology (ART) and unassisted conceptions are available. However, various studies use different tissue types and different populations in their analyses, making data comparison and integration difficult. OBJECTIVE To compare and integrate data on genome-wide analyses of methylation differences due to ART, allowing exposure of overarching themes. EVIDENCE REVIEW All studies undertaking genome-wide analysis of human methylation differences due to ART or infertility in any tissue type across the lifespan were assessed for inclusion. FINDINGS Seventeen studies were identified that met the inclusion criteria. One study assessed trophectoderm biopsies, 2 first-trimester placenta, 1 first-trimester fetal tissue, 2 term placenta, 7 cord blood, 3 newborn dried blood spots, 1 childhood buccal smears, 1 childhood peripheral blood, and 2 adult peripheral blood. Eleven studies compared tissues from in vitro fertilization (IVF) conceptions with those of unassisted conceptions, 4 compared intracytoplasmic sperm injection with unassisted conceptions, 4 compared non-IVF fertility treatment (NIFT) with unassisted conceptions, 4 compared NIFT with IVF, and 5 compared an infertile population (conceiving via various methods) with an unassisted presumably fertile population. In studies assessing placental tissue, 1 gene with potential methylation changes due to IVF when compared with unassisted conceptions was identified by 2 studies. In blood, 11 potential genes with methylation changes due to IVF compared with unassisted conceptions were identified by 2 studies, 1 of which was identified by 3 studies. Three potentially affected genes were identified by 2 studies involving blood between intracytoplasmic sperm injection and unassisted populations. There were no overlapping genes identified in any tissue type between NIFT and unassisted populations, between NIFT and IVF, or the infertility combined population when compared with the unassisted fertile population. CONCLUSIONS Comparing studies is challenging due to differing variables between analyses. However, even in similar tissue types and populations, overlapping methylation changes are limited, suggesting that differences due to ART are minimal. RELEVANCE Information from this systematic review is significant for providers and patients who provide and use ART to understand methylation risks that may be associated with the technology.
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Affiliation(s)
- Amelia M Schaub
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Cedars Sinai Medical Center, Los Angeles, California
| | - Tania L Gonzalez
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Cedars Sinai Medical Center, Los Angeles, California
| | - Anna E Dorfman
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Cedars Sinai Medical Center, Los Angeles, California
| | - Allynson G Novoa
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Cedars Sinai Medical Center, Los Angeles, California
| | - Rimsha A Hussaini
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Cedars Sinai Medical Center, Los Angeles, California
| | - Paige M Harakuni
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Cedars Sinai Medical Center, Los Angeles, California
| | - Mayaal H Khan
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Cedars Sinai Medical Center, Los Angeles, California
| | - Brandon J Shabani
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Cedars Sinai Medical Center, Los Angeles, California
| | - Akhila Swarna
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Cedars Sinai Medical Center, Los Angeles, California
| | - Erica T Wang
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Cedars Sinai Medical Center, Los Angeles, California
| | - Jessica L Chan
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Cedars Sinai Medical Center, Los Angeles, California
| | - John Williams
- Division of Maternal Fetal Medicine, Department of Obstetrics and Gynecology, Cedars Sinai Medical Center, Los Angeles, California; David Geffen School of Medicine at UCLA, Los Angeles, California
| | - Margareta D Pisarska
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Cedars Sinai Medical Center, Los Angeles, California; David Geffen School of Medicine at UCLA, Los Angeles, California.
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Shibata T, Bhat SA, Cao D, Saito S, Bernstein EA, Nishi E, Medenilla JD, Wang ET, Chan JL, Pisarska MD, Tourtellotte WG, Giani JF, Bernstein KE, Khan Z. Testicular ACE regulates sperm metabolism and fertilization through the transcription factor PPARγ. J Biol Chem 2024; 300:105486. [PMID: 37992807 PMCID: PMC10788540 DOI: 10.1016/j.jbc.2023.105486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 11/06/2023] [Accepted: 11/13/2023] [Indexed: 11/24/2023] Open
Abstract
Testis angiotensin-converting enzyme (tACE) plays a critical role in male fertility, but the mechanism is unknown. By using ACE C-domain KO (CKO) mice which lack tACE activity, we found that ATP in CKO sperm was 9.4-fold lower than WT sperm. Similarly, an ACE inhibitor (ACEi) reduced ATP production in mouse sperm by 72%. Metabolic profiling showed that tACE inactivation severely affects oxidative metabolism with decreases in several Krebs cycle intermediates including citric acid, cis-aconitic acid, NAD, α-ketoglutaric acid, succinate, and L-malic acid. We found that sperms lacking tACE activity displayed lower levels of oxidative enzymes (CISY, ODO1, MDHM, QCR2, SDHA, FUMH, CPT2, and ATPA) leading to a decreased mitochondrial respiration rate. The reduced energy production in CKO sperms leads to defects in their physiological functions including motility, acrosine activity, and fertilization in vitro and in vivo. Male mice treated with ACEi show severe impairment in reproductive capacity when mated with female mice. In contrast, an angiotensin II receptor blocker (ARB) had no effect. CKO sperms express significantly less peroxisome proliferators-activated receptor gamma (PPARγ) transcription factor, and its blockade eliminates the functional differences between CKO and WT sperms, indicating PPARγ might mediate the effects of tACE on sperm metabolism. Finally, in a cohort of human volunteers, in vitro treatment with the ramipril or a PPARγ inhibitor reduced ATP production in human sperm and hence its motility and acrosine activity. These findings may have clinical significance since millions of people take ACEi daily, including men who are reproductively active.
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Affiliation(s)
- Tomohiro Shibata
- Department of Pathology and Laboratory Medicine, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Shabir A Bhat
- Department of Pathology and Laboratory Medicine, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - DuoYao Cao
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Suguru Saito
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Ellen A Bernstein
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Erika Nishi
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Juliet D Medenilla
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Erica T Wang
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Jessica L Chan
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Margareta D Pisarska
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, California, USA; Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Warren G Tourtellotte
- Department of Pathology and Laboratory Medicine, Cedars-Sinai Medical Center, Los Angeles, California, USA; Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, California, USA; Department of Neurology, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Jorge F Giani
- Department of Pathology and Laboratory Medicine, Cedars-Sinai Medical Center, Los Angeles, California, USA; Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Kenneth E Bernstein
- Department of Pathology and Laboratory Medicine, Cedars-Sinai Medical Center, Los Angeles, California, USA; Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Zakir Khan
- Department of Pathology and Laboratory Medicine, Cedars-Sinai Medical Center, Los Angeles, California, USA; Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, California, USA.
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Gonzalez TL, Wertheimer S, Flowers AE, Wang Y, Santiskulvong C, Clark EL, Jefferies CA, Lawrenson K, Chan JL, Joshi NV, Zhu Y, Tseng HR, Karumanchi SA, Williams J, Pisarska MD. High-throughput mRNA-seq atlas of human placenta shows vast transcriptome remodeling from first to third trimester. bioRxiv 2023:2023.06.06.543972. [PMID: 37333287 PMCID: PMC10274746 DOI: 10.1101/2023.06.06.543972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/20/2023]
Abstract
Background The placenta, composed of chorionic villi, changes dramatically across gestation. Understanding differences in ongoing pregnancies are essential to identify the role of chorionic villi at specific times in gestation and develop biomarkers and prognostic indicators of maternal- fetal health. Methods The normative mRNA profile is established using next-generation sequencing of 124 first trimester and 43 third trimester human placentas from ongoing healthy pregnancies. Stably expressed genes not different between trimesters and with low variability are identified. Differential expression analysis of first versus third trimester adjusted for fetal sex is performed, followed by a subanalysis with 23 matched pregnancies to control for subject variability using the same genetic and environmental background. Results Placenta expresses 14,979 mRNAs above sequencing noise (TPM>0.66), with 1,545 stably expressed genes across gestation. Differentially expressed genes account for 86.7% of genes in the full cohort (FDR<0.05). Fold changes highly correlate between the full cohort and subanalysis (Pearson = 0.98). At stricter thresholds (FDR<0.001, fold change>1.5), there are 6,941 differentially expressed protein coding genes (3,206 upregulated in first and 3,735 upregulated in third trimester). Conclusion This is the largest mRNA atlas of healthy human placenta across gestation, controlling for genetic and environmental factors, demonstrating substantial changes from first to third trimester in chorionic villi. Specific differences and stably expressed genes may be used to understand the specific role of the chorionic villi throughout gestation and develop first trimester biomarkers of placental health that transpire across gestation, which can be used for future development of biomarkers in maternal-fetal disease.
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VanHise K, Wang ET, Norris K, Azziz R, Pisarska MD, Chan JL. Racial and ethnic disparities in polycystic ovary syndrome. Fertil Steril 2023; 119:348-354. [PMID: 36702345 DOI: 10.1016/j.fertnstert.2023.01.031] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Revised: 01/18/2023] [Accepted: 01/19/2023] [Indexed: 01/25/2023]
Abstract
Polycystic ovary syndrome (PCOS) is a common endocrine disorder that impacts women worldwide. There are several racial and ethnic differences in PCOS phenotypes and in PCOS- associated metabolic dysfunction. In this review, we summarize the current literature on disparities in the diagnosis and outcomes associated with PCOS in the United States. Future studies are needed to address gaps in knowledge for racial and ethnic-specific differences in PCOS, and include a large number of non-White and/or Hispanic participants in PCOS studies.
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Affiliation(s)
- Katherine VanHise
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, California
| | - Erica T Wang
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, California
| | - Keith Norris
- Division of General Internal Medicine and Health Services Research, University of California, Los Angeles Medical Center, Los Angeles, California
| | - Ricardo Azziz
- Department of Obstetrics and Gynecology, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, Alabama; Department of Medicine, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, Alabama; Department of Health Policy, Management and Behavior, School of Public Health, University at Albany, SUNY, Rensselaer, New York; Department of Healthcare Organization and Policy, School of Public Health, University of Alabama at Birmingham, Birmingham, Alabama
| | - Margareta D Pisarska
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, California
| | - Jessica L Chan
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, California.
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9
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VanHise K, Chan JL, Wertheimer S, Handelsman RG, Clark E, Buttle R, Wang ET, Azziz R, Pisarska MD. Regional Variation in Hormonal and Metabolic Parameters of White and Black Women With PCOS in the United States. J Clin Endocrinol Metab 2023; 108:706-712. [PMID: 36218376 DOI: 10.1210/clinem/dgac515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Indexed: 11/19/2022]
Abstract
CONTEXT Ongoing research is needed to determine geo-epidemiologic differences of polycystic ovary syndrome (PCOS). OBJECTIVE Determine hormonal and metabolic parameters of women with PCOS in 2 environments. METHODS Prospective cohort study. SETTING Tertiary-care based specialty clinics in Alabama and California. PATIENTS OR OTHER PARTICIPANTS A total of 1610 women with PCOS by National Institutes of Health Criteria from 1987 to 2010. INTERVENTIONS Interview, physical examination, laboratory studies. MAIN OUTCOMES MEASURES Demographic data, menstrual cycle history, and hormonal and metabolic parameters were collected. Hirsutism was defined as modified Ferriman-Gallwey scores ≥4. Androgen values greater than laboratory reference ranges or >95th percentile of all values were considered elevated (hyperandrogenemia). Metabolic parameters included body mass index (BMI), waist-hip-ratio (WHR), glucose tolerance test, and homeostatic model assessment for insulin resistance (HOMA-IR) scores. RESULTS Alabama women with PCOS were younger with a higher BMI. After adjustment for age and BMI, Alabama women with PCOS were more likely hirsute (adjusted odds ratio [aOR], 1.8; 95% CI, 1.4-2.4; P < 0.001), with elevated HOMA-IR scores (adjusted beta coefficient 3.6; 95% CI, 1.61-5.5; P < 0.001). California women with PCOS were more likely to have hyperandrogenemia (free testosterone aOR, 0.14; 95% CI, 0.11-0.18; P < 0.001; total testosterone aOR, 0.41; 95% CI, 0.33-0.51). Results were similar when stratified by White race. In Black women with PCOS, BMI and WHR did not differ between locations, yet differences in androgen profiles and metabolic dysfunction remained. CONCLUSION Alabama women with PCOS, regardless of Black or White race, were more likely hirsute with metabolic dysfunction, whereas California women with PCOS were more likely to demonstrate hyperandrogenemia, highlighting potential environmental impacts on PCOS.
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Affiliation(s)
| | | | | | | | | | - Rae Buttle
- Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Erica T Wang
- Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Ricardo Azziz
- Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, University of Alabama at Birmingham, Birmingham, AL 35233, USA
- Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, University of Albany, SUNY, Albany, NY 12208, USA
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10
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Handelsman RG, Wertheimer S, VanHise K, Buttle RA, Clark EL, Wang ET, Azziz R, Pisarska MD, Chan JL. Ovarian volume as an independent marker for metabolic dysfunction in women with suspected androgen excess. F S Rep 2022; 3:366-371. [PMID: 36568921 PMCID: PMC9783138 DOI: 10.1016/j.xfre.2022.09.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 09/19/2022] [Accepted: 09/21/2022] [Indexed: 12/27/2022] Open
Abstract
Objective To determine whether ovarian volume (OV) alone is an independent marker for metabolic dysfunction in women with suspected androgen excess. Design Retrospective cohort study. Setting Tertiary academic reproductive endocrinology clinic. Patients Women aged ≥21 years recruited/referred for symptoms related to androgen excess. Interventions Transvaginal ovarian ultrasound, physical and medical evaluation, 2-hour 75-g oral glucose tolerance test (oGTT), and blood sampling. Main Outcome Measures Prevalence of hyperandrogenism and metabolic dysfunction. Results This study included 666 women, of whom 412 (61.9%) and 254 had OVs of >10 and ≤10 mL, respectively. An OV of >10 mL was associated with a higher prevalence of hirsutism (65.1% vs. 51.5%) than an OV of ≤10 mL. Polycystic ovary syndrome by the National Institutes of Health 1990 criteria was found in 67.3% and 51.4% of women with OVs of >10 and ≤10 mL, respectively. Metabolic parameters, including body mass index, waist circumference, and 1-hour insulin levels during the oGTT (odds ratio, 1.98; 95% confidence interval, 1.18-3.31), were significantly higher in women with an OV of >10 mL than in those with an OV of ≤10 mL. An OV of ≤10 mL had a 76.3% negative predictive value for hyperinsulinemia at 1 hour. Conclusions In women with suspected androgen excess, an OV of >10 mL in at least 1 ovary is not associated with metabolic syndrome but is associated with younger age; an increased body mass index and waist circumference; a higher prevalence of hirsutism, oligoovulation, and polycystic ovary syndrome; and a higher 60-minute insulin level during the oGTT. Overall, an increased OV appears to be a good marker for hyperinsulinemia and hyperandrogenism in women suspected of having an androgen excess disorder.
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Affiliation(s)
| | | | | | - Rae A. Buttle
- Cedars-Sinai Medical Center, Los Angeles, California
| | | | - Erica T. Wang
- Cedars-Sinai Medical Center, Los Angeles, California
| | - Ricardo Azziz
- University of Alabama at Birmingham, Birmingham, Alabama
| | | | - Jessica L. Chan
- Cedars-Sinai Medical Center, Los Angeles, California
- Reprint requests: Jessica L. Chan, M.D., M.S.C.E., Cedars-Sinai Medical Center, 8635 W. 3rd Street Suite 160W, Los Angeles, California 90048.
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11
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Gomez JMD, VanHise K, Stachenfeld N, Chan JL, Merz NB, Shufelt C. Subclinical cardiovascular disease and polycystic ovary syndrome. Fertil Steril 2022; 117:912-923. [PMID: 35512975 DOI: 10.1016/j.fertnstert.2022.02.028] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Revised: 02/28/2022] [Accepted: 02/28/2022] [Indexed: 12/12/2022]
Abstract
Polycystic ovary syndrome (PCOS) impacts approximately 6%-10% of women worldwide, with hallmark features of hyperandrogenism, irregular menses, infertility, and polycystic appearing ovaries on ultrasound. In addition, PCOS is associated with several endocrine and metabolic disorders, including obesity, insulin resistance and diabetes mellitus, hypertension, dyslipidemia and metabolic syndrome, which all increase the risk for subclinical cardiovascular disease (CVD), the presence of altered vascular endothelium without overt CVD. In this review, we summarize the most recent literature regarding subclinical CVD in women with PCOS, including markers such as flow-mediated dilation, arterial stiffness, coronary artery calcium scores, carotid intima-media thickness and visceral and epicardial fat.
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Affiliation(s)
- Joanne Michelle D Gomez
- Barbra Streisand Women's Heart Center, Smidt Heart Institute, Cedars Sinai Medical Center, Los Angeles, California
| | - Katherine VanHise
- Department of Obstetrics and Gynecology, Cedars Sinai Medical Center, Los Angeles, California
| | - Nina Stachenfeld
- Department of Obstetrics and Gynecology, Yale School of Medicine, New Haven, Connecticut
| | - Jessica L Chan
- Department of Obstetrics and Gynecology, Cedars Sinai Medical Center, Los Angeles, California; Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Cedars Sinai Medical Center, Los Angeles, California
| | - Noel Bairey Merz
- Barbra Streisand Women's Heart Center, Smidt Heart Institute, Cedars Sinai Medical Center, Los Angeles, California
| | - Chrisandra Shufelt
- Barbra Streisand Women's Heart Center, Smidt Heart Institute, Cedars Sinai Medical Center, Los Angeles, California.
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12
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Flowers AE, Gonzalez TL, Joshi NV, Eisman LE, Clark EL, Buttle RA, Sauro E, DiPentino R, Lin Y, Wu D, Wang Y, Santiskulvong C, Tang J, Lee B, Sun T, Chan JL, Wang ET, Jefferies C, Lawrenson K, Zhu Y, Afshar Y, Tseng HR, Williams J, Pisarska MD. Sex differences in microRNA expression in first and third trimester human placenta†. Biol Reprod 2021; 106:551-567. [PMID: 35040930 DOI: 10.1093/biolre/ioab221] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Revised: 11/09/2021] [Accepted: 12/04/2021] [Indexed: 12/13/2022] Open
Abstract
Maternal and fetal pregnancy outcomes related to placental function vary based on fetal sex, which may be due to sexually dimorphic epigenetic regulation of RNA expression. We identified sexually dimorphic miRNA expression throughout gestation in human placentae. Next-generation sequencing identified miRNA expression profiles in first and third trimester uncomplicated pregnancies using tissue obtained at chorionic villous sampling (n = 113) and parturition (n = 47). Sequencing analysis identified 986 expressed mature miRNAs from female and male placentae at first and third trimester (baseMean>10). Of these, 11 sexually dimorphic (FDR < 0.05) miRNAs were identified in the first and 4 in the third trimester, all upregulated in females, including miR-361-5p, significant in both trimesters. Sex-specific analyses across gestation identified 677 differentially expressed (DE) miRNAs at FDR < 0.05 and baseMean>10, with 508 DE miRNAs in common between female-specific and male-specific analysis (269 upregulated in first trimester, 239 upregulated in third trimester). Of those, miR-4483 had the highest fold changes across gestation. There were 62.5% more female exclusive differences with fold change>2 across gestation than male exclusive (52 miRNAs vs 32 miRNAs), indicating miRNA expression across human gestation is sexually dimorphic. Pathway enrichment analysis identified significant pathways that were differentially regulated in first and third trimester as well as across gestation. This work provides the normative sex dimorphic miRNA atlas in first and third trimester, as well as the sex-independent and sex-specific placenta miRNA atlas across gestation, which may be used to identify biomarkers of placental function and direct functional studies investigating placental sex differences.
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Affiliation(s)
- Amy E Flowers
- Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Tania L Gonzalez
- Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Nikhil V Joshi
- Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, Cedars-Sinai Medical Center, Los Angeles, CA, USA
- David Geffen School of Medicine, University of California, Los Angeles, CA, USA
| | - Laura E Eisman
- Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Ekaterina L Clark
- Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Rae A Buttle
- Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Erica Sauro
- Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Rosemarie DiPentino
- Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Yayu Lin
- Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Di Wu
- Genomics Core, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Yizhou Wang
- Genomics Core, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Chintda Santiskulvong
- CS Cancer Applied Genomics Shared Resource, CS Cancer, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Jie Tang
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Bora Lee
- Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Tianyanxin Sun
- Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Jessica L Chan
- Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, Cedars-Sinai Medical Center, Los Angeles, CA, USA
- David Geffen School of Medicine, University of California, Los Angeles, CA, USA
| | - Erica T Wang
- Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, Cedars-Sinai Medical Center, Los Angeles, CA, USA
- David Geffen School of Medicine, University of California, Los Angeles, CA, USA
| | - Caroline Jefferies
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Kate Lawrenson
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA, USA
- Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Yazhen Zhu
- California NanoSystems Institute, Crump Institute for Molecular Imaging, Department of Molecular and Medical Pharmacology, University of California, Los Angeles, Los Angeles, CA, USA
| | - Yalda Afshar
- David Geffen School of Medicine, University of California, Los Angeles, CA, USA
| | - Hsian-Rong Tseng
- California NanoSystems Institute, Crump Institute for Molecular Imaging, Department of Molecular and Medical Pharmacology, University of California, Los Angeles, Los Angeles, CA, USA
| | - John Williams
- David Geffen School of Medicine, University of California, Los Angeles, CA, USA
- Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Margareta D Pisarska
- Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, Cedars-Sinai Medical Center, Los Angeles, CA, USA
- David Geffen School of Medicine, University of California, Los Angeles, CA, USA
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA, USA
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13
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Gonzalez TL, Eisman LE, Joshi NV, Flowers AE, Wu D, Wang Y, Santiskulvong C, Tang J, Buttle RA, Sauro E, Clark EL, DiPentino R, Jefferies CA, Chan JL, Lin Y, Zhu Y, Afshar Y, Tseng HR, Taylor K, Williams J, Pisarska MD. High-throughput miRNA sequencing of the human placenta: expression throughout gestation. Epigenomics 2021; 13:995-1012. [PMID: 34030457 PMCID: PMC8244582 DOI: 10.2217/epi-2021-0055] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Accepted: 04/29/2021] [Indexed: 12/11/2022] Open
Abstract
Aim: To understand miRNA changes across gestation in healthy human placentae. This is essential before miRNAs can be used as biomarkers or prognostic indicators during pregnancy. Materials & methods: Using next-generation sequencing, we characterize the normative human placenta miRNome in first (n = 113) and third trimester (n = 47). Results & conclusion: There are 801 miRNAs expressed in both first and third trimester, including 182 with similar expression across gestation (p ≥ 0.05, fold change ≤2) and 180 significantly different (false discovery rate <0.05, fold change >2). Of placenta-specific miRNA clusters, chromosome 14 miRNA cluster decreases across gestation and chromosome 19 miRNA cluster is overall highly expressed. Chromosome 13 clusters are upregulated in first trimester. This work provides a rich atlas of healthy pregnancies to direct functional studies investigating the epigenetic differences in first and third trimester placentae.
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Affiliation(s)
- Tania L Gonzalez
- Department of Obstetrics & Gynecology, Center for Reproductive Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Laura E Eisman
- Department of Obstetrics & Gynecology, Center for Reproductive Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Nikhil V Joshi
- Department of Obstetrics & Gynecology, Center for Reproductive Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
- David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Amy E Flowers
- Department of Obstetrics & Gynecology, Center for Reproductive Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Di Wu
- Genomics Core, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Yizhou Wang
- Genomics Core, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Chintda Santiskulvong
- CS Cancer Applied Genomics Shared Resource, CS Cancer, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Jie Tang
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Rae A Buttle
- Department of Obstetrics & Gynecology, Center for Reproductive Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Erica Sauro
- Department of Obstetrics & Gynecology, Center for Reproductive Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Ekaterina L Clark
- Department of Obstetrics & Gynecology, Center for Reproductive Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Rosemarie DiPentino
- Department of Obstetrics & Gynecology, Center for Reproductive Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Caroline A Jefferies
- Division of Rheumatology, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Jessica L Chan
- Department of Obstetrics & Gynecology, Center for Reproductive Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
- David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Yayu Lin
- Department of Obstetrics & Gynecology, Center for Reproductive Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Yazhen Zhu
- California NanoSystems Institute, Crump Institute for Molecular Imaging, Department of Molecular & Medical Pharmacology, University of California, Los Angeles, CA 90095, USA
| | - Yalda Afshar
- David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Hsian-Rong Tseng
- California NanoSystems Institute, Crump Institute for Molecular Imaging, Department of Molecular & Medical Pharmacology, University of California, Los Angeles, CA 90095, USA
| | - Kent Taylor
- David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA 90095, USA
- The Institute for Translational Genomics & Population Sciences, Department of Pediatrics, The Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center, Torrance, CA 90502, USA
| | - John Williams
- Department of Obstetrics & Gynecology, Center for Reproductive Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
- David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Margareta D Pisarska
- Department of Obstetrics & Gynecology, Center for Reproductive Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
- David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA 90095, USA
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
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Chan JL, Pall M, Ezeh U, Mathur R, Pisarska MD, Azziz R. Screening for Androgen Excess in Women: Accuracy of Self-Reported Excess Body Hair Growth and Menstrual Dysfunction. J Clin Endocrinol Metab 2020; 105:5842110. [PMID: 32442282 PMCID: PMC7448931 DOI: 10.1210/clinem/dgz264] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Accepted: 05/15/2020] [Indexed: 12/25/2022]
Abstract
CONTEXT Epidemiologic studies of polycystic ovary syndrome (PCOS) are limited, especially in populations where diagnostic resources are less available. In these settings, an accurate, low-cost screening tool would be invaluable. OBJECTIVE To test the use of a simple questionnaire to identify women at increased risk for PCOS and androgen excess (AE) disorders. STUDY DESIGN Prospective cohort study from 2006-2010. SETTING Community-based. PARTICIPANTS Women aged 14 to 45 years. INTERVENTION A screening telephone questionnaire consisting of 3 questions was tested, where participants were asked to self-assess the presence/absence of male-like hair and menstrual irregularity. Participants were then invited to undergo a direct examination, including completing a medical history and undergoing a modified Ferriman-Gallwey (mFG) hirsutism score, ovarian ultrasound, and measurement of circulating total and free testosterone, DHEAS, TSH, prolactin and 17-hydroxyprogesterone levels. MAIN OUTCOME MEASURE Accuracy of questionnaire in predicting PCOS, AE, and irregular menses. RESULTS Participants with self-assessed irregular menses and/or excess hair were labeled "Possible Androgen Excess (Poss-AE)" and those self-assessed with regular menses and no excess hair were labeled "Probable Non-Androgen Excess (Non-AE)." The study was completed in 206/298 (69%) of the Poss-AE and in 139/192 (73%) of the Non-AE. Of Poss-AE and Non-AE subjects, 82.5% and 15.8%, respextively, presented with PCOS. The calculated sensitivity, specificity, positive predictive value, and negative predictive value of the 3-question telephone survey to predict PCOS was 89%, 78%, 85%, and 83%, respectively. CONCLUSIONS A simple telephone questionnaire, based on self-assessment of body hair and menstrual status, can be used with a high predictive value to identify women at risk for AE disorders, including PCOS, and to detect healthy controls. This approach could be an important tool for needed epidemiologic studies.
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Affiliation(s)
- Jessica L Chan
- Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, California
| | - Marita Pall
- Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, California
| | - Uche Ezeh
- Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, California
| | - Ruchi Mathur
- Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, California
- Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, California
| | - Margareta D Pisarska
- Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, California
- Department of Obstetrics, The David Geffen School of Medicine at University of California Los Angeles, Los Angeles, California
- Department of Gynecology, The David Geffen School of Medicine at University of California Los Angeles, Los Angeles, California
| | - Ricardo Azziz
- Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, California
- Department of Obstetrics, The David Geffen School of Medicine at University of California Los Angeles, Los Angeles, California
- Department of Gynecology, The David Geffen School of Medicine at University of California Los Angeles, Los Angeles, California
- Department of Health Policy, Management & Behavior, School of Public Health, University at Albany, State University of New York, Albany, New York
- Department of Obstetrics and Gynecology, University of Alabama at Birmingham, Birmingham, Alabama
- Correspondence: Ricardo Azziz, 1209 Montgomery Hwy., Birmingham, AL 35216, USA. E-mail:
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Handelsman RG, Wertheimer S, VanHise K, Buttle RA, Wang ET, Azziz R, Pisarska MD, Chan JL. EVALUATING OVARIAN VOLUME AS A SINGLE MARKER FOR POLYCYSTIC OVARY SYNDROME (PCOS) AND METABOLIC DYSFUNCTION. Fertil Steril 2020. [DOI: 10.1016/j.fertnstert.2020.08.1178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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16
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Eisman LE, Pisarska MD, Wertheimer S, Chan JL, Akopians AL, Surrey MW, Danzer HC, Ghadir S, Chang WY, Alexander CJ, Wang ET. Clinical utility of the endometrial receptivity array in women with prior failed transfers. Fertil Steril 2019. [DOI: 10.1016/j.fertnstert.2019.07.552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Wertheimer S, Chan JL, Wang ET, Azziz R, Pisarska MD. Is hirsutism a marker of metabolic dysfunction? Fertil Steril 2019. [DOI: 10.1016/j.fertnstert.2019.07.1112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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18
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Chan JL, Pall M, Ezeh U, Mathur R, Wang ET, Pisarska MD, Azziz R. Screening for androgen excess in women: accuracy of self-reported excess body hair growth and menstrual dysfunction. Fertil Steril 2019. [DOI: 10.1016/j.fertnstert.2019.07.247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Pisarska MD, Chan JL, Lawrenson K, Gonzalez TL, Wang ET. Genetics and Epigenetics of Infertility and Treatments on Outcomes. J Clin Endocrinol Metab 2019; 104:1871-1886. [PMID: 30561694 PMCID: PMC6463256 DOI: 10.1210/jc.2018-01869] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Accepted: 12/12/2018] [Indexed: 02/08/2023]
Abstract
CONTEXT Infertility affects 10% of the reproductive-age population. Even the most successful treatments such as assisted reproductive technologies still result in failed implantation. In addition, adverse pregnancy outcomes associated with infertility have been attributed to these fertility treatments owing to the presumed epigenetic modifications of in vitro fertilization and in vitro embryo development. However, the diagnosis of infertility has been associated with adverse outcomes, and the etiologies leading to infertility have been associated with adverse pregnancy and long-term outcomes. EVIDENCE ACQUISITION We have comprehensively summarized the data available through observational, experimental, cohort, and randomized studies to better define the effect of the underlying infertility diagnosis vs the epigenetics of infertility treatments on treatment success and overall outcomes. EVIDENCE SYNTHESIS Most female infertility results from polycystic ovary syndrome, endometriosis, and unexplained infertility, with some cases resulting from a polycystic ovary syndrome phenotype or underlying endometriosis. In addition to failed implantation, defective implantation can lead to problems with placentation that leads to adverse pregnancy outcomes, affecting both mother and fetus. CONCLUSION Current research, although limited, has suggested that genetics and epigenetics of infertility diagnosis affects disease and overall outcomes. In addition, other fertility treatments, which also lead to adverse outcomes, are aiding in the identification of factors, including the supraphysiologic hormonal environment, that might affect the overall success and healthy outcomes for mother and child. Further studies, including genome-wide association studies, epigenomics studies, and experimental studies, are needed to better identify the factors leading to these outcomes.
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Affiliation(s)
- Margareta D Pisarska
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, California
- David Geffen School of Medicine at UCLA, Los Angeles, California
| | - Jessica L Chan
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, California
| | - Kate Lawrenson
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, California
| | - Tania L Gonzalez
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, California
| | - Erica T Wang
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, California
- David Geffen School of Medicine at UCLA, Los Angeles, California
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20
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Sun T, Lee B, Kinchen J, Wang ET, Gonzalez TL, Chan JL, Rotter JI, Chen YDI, Taylor K, Goodarzi MO, Rich SS, Farber CR, Williams J, Pisarska MD. Differences in First-Trimester Maternal Metabolomic Profiles in Pregnancies Conceived From Fertility Treatments. J Clin Endocrinol Metab 2019; 104:1005-1019. [PMID: 30445606 PMCID: PMC6373171 DOI: 10.1210/jc.2018-01118] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/26/2018] [Accepted: 11/12/2018] [Indexed: 02/06/2023]
Abstract
CONTEXT Maternal metabolic status reflects underlying physiological changes in the maternal-placental-fetal unit that may help identify contributors to adverse pregnancy outcomes associated with infertility and treatments used. OBJECTIVE To determine if maternal metabolomic profiles differ between spontaneous pregnancies and pregnancies conceived with fertility treatments that may explain the differences in pregnancy outcomes. DESIGN Metabolon metabolomic analysis and ELISAs for 17-β-estradiol and progesterone were performed during the late first trimester of pregnancy. SETTING Academic institution. SUBJECTS Women in the Spontaneous/Medically Assisted/Assisted Reproductive Technology cohort (N = 409), 208 of whom conceived spontaneously and 201 with infertility [non in vitro fertilization treatments (NIFT), n=90; in vitro fertilization (IVF), n=111]. INTERVENTION Mode of conception. MAIN OUTCOME MEASURES Levels of of 806 metabolites within eight superpathways, 17-β-estradiol, and progesterone in maternal plasma in the late first trimester. RESULTS Metabolomic differences in the lipid superpathway (i.e., steroid metabolites, lipids with docosahexaenoyl acyl chains, acyl cholines), and xanthine and benzoate metabolites (P < 0.05) were significant among the spontaneous and two infertility groups, with greatest differences between the spontaneous and IVF groups. 17-β-estradiol and progesterone levels were significantly elevated in the infertility groups, with greatest differences between the spontaneous and IVF groups. CONCLUSION Metabolomic profiles differ between spontaneous and infertility pregnancies, likely driven by IVF. Higher levels of steroids and their metabolites are likely due to increased hormone production from placenta reprogrammed from fertility treatments, which may contribute to adverse outcomes associated with infertility and the treatments used.
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Affiliation(s)
- Tianyanxin Sun
- Division of Reproductive Endocrinology and Infertility, Center for Reproductive Medicine, Cedars-Sinai Medical Center, Los Angeles, California
| | - Bora Lee
- Division of Reproductive Endocrinology and Infertility, Center for Reproductive Medicine, Cedars-Sinai Medical Center, Los Angeles, California
| | | | - Erica T Wang
- Division of Reproductive Endocrinology and Infertility, Center for Reproductive Medicine, Cedars-Sinai Medical Center, Los Angeles, California
- David Geffen School of Medicine at University of California, Los Angeles, Los Angeles, California
| | - Tania L Gonzalez
- Division of Reproductive Endocrinology and Infertility, Center for Reproductive Medicine, Cedars-Sinai Medical Center, Los Angeles, California
| | - Jessica L Chan
- Division of Reproductive Endocrinology and Infertility, Center for Reproductive Medicine, Cedars-Sinai Medical Center, Los Angeles, California
| | - Jerome I Rotter
- LA Biomed/Harbor-University of California, Los Angeles Medical Center, Torrance, California
| | - Yii-Der Ida Chen
- LA Biomed/Harbor-University of California, Los Angeles Medical Center, Torrance, California
| | - Kent Taylor
- LA Biomed/Harbor-University of California, Los Angeles Medical Center, Torrance, California
| | - Mark O Goodarzi
- David Geffen School of Medicine at University of California, Los Angeles, Los Angeles, California
- Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, California
| | - Stephen S Rich
- Center for Public Health Genomics, University of Virginia, Charlottesville, Virginia
| | - Charles R Farber
- Center for Public Health Genomics, University of Virginia, Charlottesville, Virginia
| | - John Williams
- Division of Reproductive Endocrinology and Infertility, Center for Reproductive Medicine, Cedars-Sinai Medical Center, Los Angeles, California
- David Geffen School of Medicine at University of California, Los Angeles, Los Angeles, California
| | - Margareta D Pisarska
- Division of Reproductive Endocrinology and Infertility, Center for Reproductive Medicine, Cedars-Sinai Medical Center, Los Angeles, California
- David Geffen School of Medicine at University of California, Los Angeles, Los Angeles, California
- Correspondence and Reprint Requests: Margareta D. Pisarska, MD, Cedars-Sinai Medical Center, 8635 West Third Street, Suite 160, Los Angeles, California 90048. E-mail:
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21
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Sundheimer LW, Chan JL, Buttle R, DiPentino R, Muramoto O, Castellano K, Wang ET, Williams J, Pisarska MD. Mode of conception does not affect fetal or placental growth parameters or ratios in early gestation or at delivery. J Assist Reprod Genet 2018; 35:1039-1046. [PMID: 29633147 DOI: 10.1007/s10815-018-1176-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2018] [Accepted: 03/29/2018] [Indexed: 11/28/2022] Open
Abstract
PURPOSE Ratio of fetal weight to placenta size varies by mode of conception (fertility treatments utilized) in animals. Our objective was to assess whether fertility treatments also affect these ratios in humans. METHODS In this retrospective study, we assessed two cohorts: (a) early gestation cohort, women with singleton pregnancies who underwent first trimester vaginal ultrasound and (b) delivered cohort, women who delivered a live-born, singleton infant with placenta disposition to pathology. Crown rump length (CRL) and estimated placental volume (EPV) were calculated from first trimester ultrasound images using a validated computation. Infant birth weight (BW), pregnancy data, placental weight (PW), and placental histopathology were collected. Fetal growth-to-placental weight ratios (CRL/EPV; BW/PW) and placentas were compared by mode of conception. Linear regression was used to adjust for confounding variables. RESULTS Two thousand one hundred seventy patients were included in the early gestation cohort and 1443 in the delivered cohort. Of the early gestation cohort (a), 85.4% were spontaneous conceptions, 5.9% Non-IVF Fertility (NIFT), and 8.7% IVF. In the delivered cohort (b), 92.4% were spontaneous, 2.1% NIFT, and 80 5.5% IVF. There were no significant differences between fetal growth-to-placental weight parameters, ratios, and neonatal birth measurements based on mode of conception. Placenta accreta was significantly higher in the patients receiving fertility treatments (1.2 versus 3.6%, p < 0.05). CONCLUSIONS Mode of conception does not appear to influence fetal growth-to-placental weight ratios throughout gestation. In addition, findings in animal models may not always translate into human studies of infertility treatment outcomes.
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Affiliation(s)
- Lauren W Sundheimer
- Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, Cedars-Sinai Medical Center, Los Angeles, CA, 90048, USA.,David Geffen School of Medicine, University of California, 8635 West Third Street, Suite 160W, Los Angeles, CA, 90048, USA
| | - Jessica L Chan
- Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, Cedars-Sinai Medical Center, Los Angeles, CA, 90048, USA
| | - Rae Buttle
- Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, Cedars-Sinai Medical Center, Los Angeles, CA, 90048, USA
| | - Rosemarie DiPentino
- Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, Cedars-Sinai Medical Center, Los Angeles, CA, 90048, USA
| | - Olivia Muramoto
- Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, Cedars-Sinai Medical Center, Los Angeles, CA, 90048, USA
| | - Kerlly Castellano
- Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, Cedars-Sinai Medical Center, Los Angeles, CA, 90048, USA
| | - Erica T Wang
- Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, Cedars-Sinai Medical Center, Los Angeles, CA, 90048, USA.,David Geffen School of Medicine, University of California, 8635 West Third Street, Suite 160W, Los Angeles, CA, 90048, USA
| | - John Williams
- David Geffen School of Medicine, University of California, 8635 West Third Street, Suite 160W, Los Angeles, CA, 90048, USA.,Department of Obstetrics and Gynecology, Division of Maternal Fetal Medicine, Cedars-Sinai Medical Center, Los Angeles, CA, 90048, USA
| | - Margareta D Pisarska
- Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, Cedars-Sinai Medical Center, Los Angeles, CA, 90048, USA. .,David Geffen School of Medicine, University of California, 8635 West Third Street, Suite 160W, Los Angeles, CA, 90048, USA.
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22
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Chan JL, Kar S, Vanky E, Morin-Papunen L, Piltonen T, Puurunen J, Tapanainen JS, Maciel GAR, Hayashida SAY, Soares JM, Baracat EC, Mellembakken JR, Dokras A. Racial and ethnic differences in the prevalence of metabolic syndrome and its components of metabolic syndrome in women with polycystic ovary syndrome: a regional cross-sectional study. Am J Obstet Gynecol 2017; 217:189.e1-189.e8. [PMID: 28400308 DOI: 10.1016/j.ajog.2017.04.007] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Revised: 03/16/2017] [Accepted: 04/03/2017] [Indexed: 02/02/2023]
Abstract
BACKGROUND Polycystic ovary syndrome is a heterogeneous disorder and its presentation varies with race and ethnicity. Reproductive-age women with polycystic ovary syndrome are at increased risk of metabolic syndrome; however, it is not clear if prevalence of metabolic syndrome and clustering of its components differs based on race and ethnicity. Moreover, the majority of these women do not undergo routine screening for metabolic syndrome. OBJECTIVE We sought to compare the prevalence of metabolic syndrome and clustering of its components in women with polycystic ovary syndrome in the United States with women in India, Brazil, Finland, and Norway. STUDY DESIGN This is a cross-sectional study performed in 1089 women with polycystic ovary syndrome from 1999 through 2016 in 5 outpatient clinics in the United States, India, Brazil, Finland, and Norway. Polycystic ovary syndrome was defined by the Rotterdam criteria. Main outcome measures were: metabolic syndrome prevalence, blood pressure, body mass index, fasting high-density lipoprotein cholesterol, fasting triglycerides, and fasting glucose. Data from all sites were reevaluated for appropriate application of diagnostic criteria for polycystic ovary syndrome, identification of polycystic ovary syndrome phenotype, and complete metabolic workup. The US White women with polycystic ovary syndrome were used as the referent group. Logistic regression models were used to evaluate associations between race and metabolic syndrome prevalence and its components and to adjust for potential confounders, including age and body mass index. RESULTS The median age of the entire cohort was 28 years. Women from India had the highest mean Ferriman-Gallwey score for clinical hyperandrogenism (15.6 ± 6.5, P < .001). The age-adjusted odds ratio for metabolic syndrome was highest in US Black women at 4.52 (95% confidence interval, 2.46-8.35) compared with US White women. When adjusted for age and body mass index, the prevalence was similar in the 2 groups. Significantly more Black women met body mass index and blood pressure criteria (P < .001), and fewer met fasting triglycerides criteria (P < .05). The age- and body mass index-adjusted prevalence of metabolic syndrome was highest in Indian women (odds ratio, 6.53; 95% confidence interval, 3.47-12.30) with abnormalities in glucose and fasting high-density lipoprotein cholesterol criterion and in Norwegian women (odds ratio, 2.16; 95% confidence interval, 1.17-3.98) with abnormalities in blood pressure, glucose, and fasting high-density lipoprotein cholesterol criterion. The Brazilian and Finnish cohorts had similar prevalence of metabolic syndrome and its components compared to US White women. CONCLUSION Despite a unifying diagnosis of polycystic ovary syndrome, there are significant differences in the prevalence of metabolic syndrome and clustering of its components based on race and ethnicity, which may reflect contributions from both racial and environmental factors. Our findings indicate the prevalence of metabolic syndrome components varies in women with polycystic ovary syndrome, such that compared to White women from the United States, Black US women had the highest prevalence, whereas women from India and Norway had a higher prevalence of metabolic syndrome independent of obesity. The differences in clustering of components of metabolic syndrome based on ethnicity highlight the need to routinely perform complete metabolic screening to identify specific targets for cardiovascular risk reduction strategies in these reproductive-age women.
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Affiliation(s)
- Jessica L Chan
- Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, University of Pennsylvania, Philadelphia, PA; Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, Cedars-Sinai Medical Center, Los Angeles, CA
| | | | - Eszter Vanky
- Department of Obstetrics and Gynecology, St Olav's Hospital, University Hospital of Trondheim, Trondheim, Norway; Institute for Laboratory Medicine, Children's and Women's Health, Norwegian University of Science and Technology, Trondheim, Norway
| | - Laure Morin-Papunen
- Department of Obstetrics and Gynecology, University of Oulu, Oulu, Finland; PEDEGO Research Unit, University of Oulu, Oulu, Finland
| | - Terhi Piltonen
- Department of Obstetrics and Gynecology, University of Oulu, Oulu, Finland; PEDEGO Research Unit, University of Oulu, Oulu, Finland
| | - Johanna Puurunen
- Department of Obstetrics and Gynecology, University of Oulu, Oulu, Finland
| | - Juha S Tapanainen
- Department of Obstetrics and Gynecology, University of Oulu, Oulu, Finland; Department of Obstetrics and Gynecology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | | | | | - Jose Maria Soares
- Department of Gynecology, University of Sao Paulo Medical School, Sao Paulo, Brazil
| | - Edmund Chada Baracat
- Department of Gynecology, University of Sao Paulo Medical School, Sao Paulo, Brazil
| | | | - Anuja Dokras
- Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, University of Pennsylvania, Philadelphia, PA.
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23
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Abstract
AbstractFemale infertility is a complex disease linked to multiple etiologies including genetic factors. Owing to the multifactorial nature of infertility, it is often difficult to identify single causative genes. Despite this challenge, investigations into the genetic causes of infertility have been performed to shed light on the etiology and for the possibility of developing personalized medical approaches to therapy. Multiple techniques have been utilized to better characterize the genetic origins of this disease, including genome-wide association studies. We present here a review of the genetic causes of female infertility, detailing some of the more recent findings in the genetics of polycystic ovary syndrome, endometriosis, primary ovarian insufficiency, hypothalamic amenorrhea, leiomyomas, and Mullerian anomalies.
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Affiliation(s)
- Nikhil Joshi
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, California
| | - Jessica L Chan
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, California
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24
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Chan JL, Levin PJ, Ford BP, Stanton DC, Pfeifer SM. Vaginoplasty with an Autologous Buccal Mucosa Fenestrated Graft in Two Patients with Vaginal Agenesis: A Multidisciplinary Approach and Literature Review. J Minim Invasive Gynecol 2017; 24:670-676. [PMID: 28212868 DOI: 10.1016/j.jmig.2016.12.030] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Revised: 11/11/2016] [Accepted: 12/13/2016] [Indexed: 10/20/2022]
Abstract
Here we describe the procedure and outcomes of a multidisciplinary approach to vaginoplasty using autologous buccal mucosa fenestrated grafts in 2 patients with vaginal agenesis. This procedure resulted in anatomic success, with a functional neovagina with good vaginal length and caliber and satisfactory sexual function capacity and well-healed buccal mucosa. There were no complications, and the patients were satisfied with the surgical results. We conclude that the use of a single fenestrated graft of autologous buccal mucosa is a simple, effective procedure for the treatment of vaginal agenesis that results in an optimally functioning neovagina with respect to vaginal length, caliber, and sexual capacity.
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Affiliation(s)
- Jessica L Chan
- Department of Obstetrics and Gynecology, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania; Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, California.
| | - Pamela J Levin
- Department of Obstetrics and Gynecology, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Brian P Ford
- Department of Oral and Maxillofacial Surgery, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania
| | - David C Stanton
- Department of Oral and Maxillofacial Surgery, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Samantha M Pfeifer
- Center for Reproductive Medicine, Weill Cornell Medical College, New York, New York
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25
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Abstract
The emerging field of oncofertility addresses fertility and the reproductive health needs for cancer patients, a key topic in cancer survivorship. Given that the standard treatment for gynecologic malignancies involves removal of reproductive organs, pelvic radiation, or chemotherapy, the effect of such treatment on fertility and options for fertility preservation are even more relevant than for other malignancies. In young women with new diagnoses of cervical, endometrial, or ovarian cancers, viable strategies for fertility preservation without compromising oncological outcome exist and should be considered. We present here a comprehensive review of the literature as it pertains to gynecologic malignancies on 1) the effects of radiation and chemotherapy on fertility, 2) fertility-sparing surgeries and the role of assisted reproductive technology, and 3) fertility preservation in adolescent girls and women with BRCA germline mutations.
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Affiliation(s)
- Jessica L Chan
- Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, Cedars-Sinai Medical Center, Los Angeles, CA, United States
| | - Erica T Wang
- Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, Cedars-Sinai Medical Center, Los Angeles, CA, United States.
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26
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Chan JL, Letourneau J, Salem W, Cil AP, Chan SW, Chen LM, Rosen MP. Regret around fertility choices is decreased with pre-treatment counseling in gynecologic cancer patients. J Cancer Surviv 2016; 11:58-63. [PMID: 27480882 DOI: 10.1007/s11764-016-0563-2] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Accepted: 07/24/2016] [Indexed: 01/06/2023]
Abstract
PURPOSE Data have demonstrated an association between regret and lack of fertility counseling among patients undergoing treatment for non-gynecologic cancers. We sought to determine if fertility-related regret is reduced with pre-treatment counseling or fertility-sparing surgery (FSS) in patients with gynecologic cancers. METHODS A cross-sectional survey was administered to 593 reproductive-age survivors (18-40 years old at diagnosis) of localized cervix, ovarian, or endometrial cancers that were eligible for FSS. A validated decision regret score was used to evaluate regret in patients. RESULTS Four hundred seventy women completed the survey. Forty-six percent received pre-treatment counseling about treatment's effects on fertility. Having received counseling (adjusted ß-coefficient of -1.24, 95 % CI = -2.29 to -0.18, p = 0.02), satisfactory counseling (adjusted ß-coefficient of -2.71, 95 % CI = -3.86 to -1.57, p < 0.001), and FSS (adjusted ß-coefficient of -1.26, 95 % CI = -2.39 to -0.14, p = 0.03) were associated with lower regret post-treatment, after adjusting for age. Time since diagnosis, prior parity, socioeconomic status and cancer type were not associated with regret (p > 0.05). While 50 % of women reported desiring more children after diagnosis, desire for children after treatment was associated with increased regret (adjusted ß-coefficient of 3.97, 95 % CI = 2.92-5.02, p < 0.001). CONCLUSIONS Though less than half of study participants received counseling about the effect of cancer treatment on future fertility, both fertility counseling and FSS were associated with decreased regret in reproductive-aged women with gynecologic cancers. The desire for more children after treatment was associated with increased regret. IMPLICATIONS FOR CANCER SURVIVORS Inquiring about fertility desires and providing counseling regarding reproductive outcomes following cancer treatment should be implemented as part of the treatment process.
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Affiliation(s)
- Jessica L Chan
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California San Francisco School of Medicine, 499 Illinois Street, Sixth Floor, San Francisco, CA, 94158, USA. .,Department of Obstetrics and Gynecology, University of Pennsylvania, 3701 Market Street, Suite 800, Philadelphia, PA, 19104, USA.
| | - Joseph Letourneau
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California San Francisco School of Medicine, 499 Illinois Street, Sixth Floor, San Francisco, CA, 94158, USA
| | - Wael Salem
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California San Francisco School of Medicine, 499 Illinois Street, Sixth Floor, San Francisco, CA, 94158, USA.,Department of Obstetrics and Gynecology, University of Southern California, 1240 North Mission Road, Los Angeles, CA, 90033, USA
| | - Aylin Pelin Cil
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California San Francisco School of Medicine, 499 Illinois Street, Sixth Floor, San Francisco, CA, 94158, USA.,Istanbul Memorial Hospital ART and Reproductive Genetics Center, Piyale Pasa Bulvari, 34385, Okmeydani Sisli, Istanbul, Turkey
| | - Sai-Wing Chan
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California San Francisco School of Medicine, 499 Illinois Street, Sixth Floor, San Francisco, CA, 94158, USA
| | - Lee-May Chen
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California San Francisco School of Medicine, 499 Illinois Street, Sixth Floor, San Francisco, CA, 94158, USA
| | - Mitchell P Rosen
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California San Francisco School of Medicine, 499 Illinois Street, Sixth Floor, San Francisco, CA, 94158, USA
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27
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Chan JL, Johnson LNC, Efymow BL, Sammel MD, Gracia CR. Outcomes of ovarian stimulation after treatment with chemotherapy. J Assist Reprod Genet 2015; 32:1537-45. [PMID: 26400507 DOI: 10.1007/s10815-015-0575-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Accepted: 09/07/2015] [Indexed: 11/28/2022] Open
Abstract
PURPOSE Chemotherapeutic agents have a known gonadotoxic effect; however, it is difficult to predict the impact they may have on ovarian stimulation. The objective of this study was to evaluate response to ovarian stimulation in patients exposed to chemotherapy compared with patients who were chemotherapy-naïve. METHODS A retrospective cohort study of 130 patients with cancer or autoimmune disease was performed. Demographics, ovarian reserve, ovarian response and stimulation parameters, and oocyte data were compared between patients who were pre- and post-chemotherapy. Logistic regression modeling was performed to identify risk factors for cancellation and low oocyte yield, adjusting for confounders as appropriate. RESULTS Antral follicle count (AFC) was significantly lower in post-chemo patients (9 vs. 17, p < 0.001). Post-chemotherapy patients were more likely to be cancelled during stimulation (23 vs. 4 %, p = 0.003). Among those that went to retrieval, there was no difference in total number of oocytes (10 vs. 10, p = 0.31) or mature oocytes retrieved (8 vs. 8, p = 0.38), despite higher starting (300 vs. 450 IU, p < 0.001) and total gonadotropin (3075 vs. 4612.5 IU, p = 0.008) doses in post-chemotherapy patients. Low AFC (≤6) was associated with cycle cancellation (OR 7.7, 95 % CI 1.8-33.2) and low oocyte yield (<6) (OR 5.4, 95 % CI 1.6-17.7). CONCLUSIONS Patients post-chemotherapy have lower AFC compared with the chemotherapy-naïve and have higher cancellation rates. Among those who underwent oocyte retrieval, oocyte yield was similar in both groups. Low AFC was most strongly associated with cycle cancellation and oocyte yield. Post-chemotherapy patients had higher rates of cycle cancellation but did equally well as pre-chemotherapy patients if they reached retrieval.
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Affiliation(s)
- Jessica L Chan
- Department of Obstetrics and Gynecology, University of Pennsylvania, 3701 Market Street, Suite 800, Philadelphia, PA, 19104, USA.
| | - Lauren N C Johnson
- Department of Obstetrics and Gynecology, University of Pennsylvania, 3701 Market Street, Suite 800, Philadelphia, PA, 19104, USA
| | - Brenda L Efymow
- Department of Obstetrics and Gynecology, University of Pennsylvania, 3701 Market Street, Suite 800, Philadelphia, PA, 19104, USA
| | - Mary D Sammel
- Center for Clinical Epidemiology and Biostatistics, University of Pennsylvania, 423 Guardian Drive, 605 Blockley Hall, Philadelphia, PA, 19104, USA
| | - Clarisa R Gracia
- Department of Obstetrics and Gynecology, University of Pennsylvania, 3701 Market Street, Suite 800, Philadelphia, PA, 19104, USA
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Chan JL, Letourneau J, Salem W, Cil AP, Chan SW, Chen LM, Rosen MP. Sexual satisfaction and quality of life in survivors of localized cervical and ovarian cancers following fertility-sparing surgery. Gynecol Oncol 2015; 139:141-7. [PMID: 26232519 DOI: 10.1016/j.ygyno.2015.07.105] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Revised: 07/24/2015] [Accepted: 07/25/2015] [Indexed: 01/23/2023]
Abstract
OBJECTIVE To determine if sexual satisfaction and sexual quality of life (QOL) are different in survivors of localized cervical and ovarian cancers who undergo fertility-sparing surgery (FSS) as compared with standard surgery. METHODS 470 survivors of localized cervical and ovarian cancers diagnosed between the ages of 18-40 were recruited from the California Cancer Registry to complete a cross-sectional survey. Validated questionnaires were used to assess sexual satisfaction and sexual QOL. RESULTS 228 women with localized cervical cancer and 125 with localized ovarian cancer completed the survey. In the cervical cancer group, 92 underwent FSS. Compared with the 84 women who did not undergo FSS (had a hysterectomy, but retained at least one ovary), there was no significant difference in sexual satisfaction or sexual QOL mean scores in women who maintained their uterus (cold-knife cone or trachelectomy), after controlling for age and menopausal status. 82 women with ovarian cancer underwent FSS. Compared with the 39 women that had a bilateral salpingo-oophorectomy, we found no significant differences in sexual satisfaction or sexual QOL in women who maintained at least one ovary (USO or cystectomy), after controlling for age and menopausal status. CONCLUSIONS While FSS may allow for post-treatment fertility, it may not confer a significant benefit with regard to sexual satisfaction or sexual QOL. Thus, the decision to perform FSS should not be dictated based on preservation of sexual functioning.
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Affiliation(s)
- Jessica L Chan
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California San Francisco School of Medicine, 1635 Divisadero, Suite 601, San Francisco, CA 94115, USA; Department of Obstetrics and Gynecology, University of Pennsylvania, 3701 Market Street, Suite 800, Philadelphia, PA 19104, USA.
| | - Joseph Letourneau
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California San Francisco School of Medicine, 1635 Divisadero, Suite 601, San Francisco, CA 94115, USA; Department of Obstetrics and Gynecology, University of North Carolina at Chapel Hill, 101 Manning Drive Chapel Hill, NC 27514, USA.
| | - Wael Salem
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California San Francisco School of Medicine, 1635 Divisadero, Suite 601, San Francisco, CA 94115, USA.
| | - Aylin Pelin Cil
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California San Francisco School of Medicine, 1635 Divisadero, Suite 601, San Francisco, CA 94115, USA; Istanbul Memorial Hospital ART and Reproductive Genetics Center, Piyale Pasa Bulvari, 34385 Okmeydani Sisli, Istanbul, Turkey.
| | - Sai-Wing Chan
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California San Francisco School of Medicine, 1635 Divisadero, Suite 601, San Francisco, CA 94115, USA.
| | - Lee-May Chen
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California San Francisco School of Medicine, 1635 Divisadero, Suite 601, San Francisco, CA 94115, USA.
| | - Mitchell P Rosen
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California San Francisco School of Medicine, 1635 Divisadero, Suite 601, San Francisco, CA 94115, USA.
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Scheer FAJL, Chan JL, Fargnoli J, Chamberland J, Arampatzi K, Shea SA, Blackburn GL, Mantzoros CS. Day/night variations of high-molecular-weight adiponectin and lipocalin-2 in healthy men studied under fed and fasted conditions. Diabetologia 2010; 53:2401-5. [PMID: 20703446 PMCID: PMC3111077 DOI: 10.1007/s00125-010-1869-7] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/14/2010] [Accepted: 07/05/2010] [Indexed: 10/19/2022]
Abstract
AIMS/HYPOTHESIS Adiponectin and lipocalin-2 are adipocyte-derived plasma proteins that have been proposed to have opposite effects on insulin sensitivity. Given the epidemiological, physiological and molecular links between sleep, the circadian timing system and glucose metabolism, the aim of this study was to assess effects of the sleep/wake cycle and the fasting/feeding cycle on high-molecular-weight adiponectin (HMW-adiponectin; the biologically active form) and lipocalin-2. We also aimed to compare the 24 h rhythms in the levels of these proteins with those of cortisol, leptin, leptin-binding protein and total adiponectin. METHODS Lean men underwent a 3 day in-laboratory study, either in the fed state (n = 8, age: 20.9 ± 2.1 years, BMI: 22.8 ± 2.3 kg/m²) or fasting state (3 day fast, n = 4, age: 25.3 ± 3.9 years, BMI: 23.3 ± 2.2 kg/m²). The sleep episode was scheduled in darkness from 23:00 to 07:00 hours. Blood was sampled every 15 min for 24 h on the third day of each study. RESULTS While fed, HMW-adiponectin and lipocalin-2 had large daily rhythms with troughs at night (HMW-adiponectin: ~04:00 hours, peak-to-trough amplitude 36%, p < 0.0001; lipocalin-2: ~04:00 hours, 40%, p < 0.0001). On the third day of fasting, the timing and relative amplitudes were unchanged (HMW-adiponectin: ~04:00 hours, 38%, p = 0.0014; lipocalin-2: ~05:00 hours, 38%, p = 0.0043). CONCLUSIONS/INTERPRETATION These data show that HMW-adiponectin and lipocalin-2 both have significant day/night rhythms, both with troughs at night, that these are not driven by the feeding/fasting cycle, and that it is important to report and/or standardise the time of day for such assays. Further studies are required to determine whether the daily rhythm of HMW-adiponectin levels influences the daily rhythm of insulin sensitivity.
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Affiliation(s)
- F A J L Scheer
- Division of Sleep Medicine, Brigham and Women's Hospital and Harvard Medical School, 221 Longwood Avenue, Boston, MA, 02115, USA,
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Pérez-Núñez MT, Souza R, Sáenz L, Chan JL, Zúñiga-Aguilar JJ, Oropeza C. Detection of a SERK-like gene in coconut and analysis of its expression during the formation of embryogenic callus and somatic embryos. Plant Cell Rep 2009; 28:11-9. [PMID: 18818928 DOI: 10.1007/s00299-008-0616-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2008] [Revised: 08/29/2008] [Accepted: 09/09/2008] [Indexed: 05/20/2023]
Abstract
Somatic embryogenesis involves different molecular events including differential gene expression and various signal transduction pathways. One of the genes identified in early somatic embryogenesis is S OMATIC E MBRYOGENESIS R ECEPTOR-like K INASE (SERK). Cocos nucifera (L.) is one of the most recalcitrant species for in vitro regeneration, achieved so far only through somatic embryogenesis, although just a few embryos could be obtained from a single explant. In order to increase efficiency of this process we need to understand it better. Therefore, the purpose of the present work was to determine if an ortholog of the SERK gene is present in the coconut genome, isolate it and analyze its expression during somatic embryogenesis. The results showed the occurrence of a SERK ortholog referred to as CnSERK. Predicted sequence analysis showed that CnSERK encodes a SERK protein with the domains reported in the SERK proteins in other species. These domains consist of a signal peptide, a leucine zipper domain, five LRR, the Serine-Proline-Proline domain, which is a distinctive domain of the SERK proteins, a single transmembrane domain, the kinase domain with 11 subdomains and the C terminal region. Analysis of its expression showed that it could be detected in embryogenic tissues before embryo development could be observed. In contrast it was not detected or at lower levels in non-embryogenic tissues, thus suggesting that CnSERK expression is associated with induction of somatic embryogenesis and that it could be a potential marker of cells competent to form somatic embryos in coconut tissues cultured in vitro.
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Affiliation(s)
- M T Pérez-Núñez
- Centro de Investigación Científica de Yucatán, Mérida, Mexico
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Abstract
Cholesterol biosynthesis is an integral part of HCV RNA replication. Not only does HCV RNA replicate on lipid rafts, but it also requires cholesterol intermediates to replicate. In addition, it has been shown in vitro that several HMG-CoA reductase inhibitors can decrease HCV RNA replication by > or = 1 log. Therefore, we designed a clinical trial to evaluate the effect of atorvastatin on HCV RNA levels. In this prospective clinical trial, where patients served as their own control, 10 HCV-infected patients who required treatment for high cholesterol were given 20 mg atorvastatin per day. Although serum cholesterol and LDL predictably decreased significantly, there was no statistically significant change in week 4 and week 12 HCV RNA levels compared to pretreatment HCV RNA levels by the paired Student t test. It is unclear whether the addition of an HMG-CoA reductase inhibitor to interferon or a more potent inhibitor of cholesterol biosynthesis may be required to inhibit HCV RNA replication in vivo. In conclusion, atorvastatin, and likely all HMG-CoA reductase inhibitors, does not inhibit HCV RNA replication in vivo at conventional doses.
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Affiliation(s)
- Jacqueline G O'Leary
- Gastrointestinal Unit, Department of Medicine, Harvard Medical School, Massachusetts General Hospital, Boston, MA, USA
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Abstract
Moisturizers are commonly used for routine skin care. This study assessed the effects of a moisturizer on barrier function, epidermal architecture, keratinocyte proliferation, and physiological regulation of the epidermis in photoaged but otherwise normal skin. Fifteen women with moderately photoaged forearms were treated twice a day for 4 weeks with a moisturizer containing dimethicone and glycerine. Baseline and post-treatment transepidermal water loss (TEWL) and ipsilateral forearm biopsies were obtained. Epidermal thickness, melanin levels, keratinocyte proliferation, and expression of keratins were evaluated. Induction of keratins 6 and 16, commonly associated with keratinocyte proliferation and wound healing, was observed. Epidermal thickness increased by 0.019 mm (P = 0.005), barrier function improved (TEWL decreased by 13%) and melanin intensity decreased (P = 0.004). Even nonxerotic, photoaged skin may appear younger, benefiting structurally and functionally from routine use of moisturizers containing dimethicone and glycerine.
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Affiliation(s)
- R W Short
- Department of Dermatology, Malcolm Grow Medical Center, MD, USA
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Chan JL, Stoyneva V, Kelesidis T, Raciti P, Mantzoros CS. Peptide YY levels are decreased by fasting and elevated following caloric intake but are not regulated by leptin. Diabetologia 2006; 49:169-73. [PMID: 16362815 DOI: 10.1007/s00125-005-0041-2] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2005] [Accepted: 08/21/2005] [Indexed: 01/01/2023]
Abstract
AIMS/HYPOTHESIS Peptide YY (PYY) is a gut-derived hormone that has been shown to reduce short-term food intake in animals and humans. It has been proposed that deficiency of PYY contributes to obesity in humans. However, the physiology of PYY regulation by factors such as caloric restriction, or by other molecules important in energy homeostasis, e.g. leptin, remains to be fully elucidated. MATERIALS AND METHODS We evaluated the effect on PYY levels of: (1) caloric ingestion (a mixed meal) in five healthy normal-weight subjects; (2) fasting for 2 or 3 days in eight lean men and seven lean women respectively; and (3) recombinant human leptin administration at physiological replacement and pharmacological doses. RESULTS PYY levels increased 50% after a mixed meal (p=0.01), and short-term complete fasting for 2 or 3 days decreased leptin and PYY levels to 20-30% and 40-60% of baseline, respectively (both p<0.05). However, recombinant human leptin administration at physiological doses to restore the fasting-induced decrease of leptin levels and at pharmacological doses over the short term had no effect on PYY levels. CONCLUSIONS/INTERPRETATION PYY increases after meal ingestion and decreases after fasting in a manner consistent with a meal-related signal of energy homeostasis. Importantly, circulating levels of this gut-secreted molecule are independent of regulation by leptin over the short term. These findings contribute towards our understanding of the homeostatic systems that regulate appetite in humans, including the possible redundancy of gastrointestinally secreted and adipocyte-secreted signals. This may be of importance for the future development of medications to treat obesity.
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Affiliation(s)
- J L Chan
- Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA
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Mullington JM, Chan JL, Van Dongen HPA, Szuba MP, Samaras J, Price NJ, Meier-Ewert HK, Dinges DF, Mantzoros CS. Sleep loss reduces diurnal rhythm amplitude of leptin in healthy men. J Neuroendocrinol 2003; 15:851-4. [PMID: 12899679 DOI: 10.1046/j.1365-2826.2003.01069.x] [Citation(s) in RCA: 193] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The aim of the current study was to investigate the effects of sleep loss on the diurnal rhythm of circulating leptin levels. An indwelling forearm catheter was used to sample blood at 90-min intervals for a total of 120 h, which included 88 h of sustained sleeplessness, in 10 healthy men. The diurnal amplitude of leptin was reduced during total sleep deprivation and returned toward normal during the period of recovery sleep. This finding provides evidence that sleep influences the nocturnal leptin profile, and may have implications for the understanding of the role of sleep in metabolic regulation and the aetiologies of obesity and the night eating syndrome.
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Affiliation(s)
- J M Mullington
- Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA 02215, USA.
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Yiannakouris N, Yannakoulia M, Melistas L, Chan JL, Klimis-Zacas D, Mantzoros CS. The Q223R polymorphism of the leptin receptor gene is significantly associated with obesity and predicts a small percentage of body weight and body composition variability. J Clin Endocrinol Metab 2001; 86:4434-9. [PMID: 11549688 DOI: 10.1210/jcem.86.9.7842] [Citation(s) in RCA: 151] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Genetic variation at the leptin receptor gene locus may play an important role in the pathophysiology of human obesity, a leptin-resistant state. Previous studies exploring potential associations between leptin receptor gene polymorphisms and obesity have reported conflicting results. The aim of this study was to evaluate a genetically homogeneous population for associations between body composition variables and three common leptin receptor gene polymorphisms (K109R, Q223R, and K656N) that have potential functional significance as well as to assess the contributions of these polymorphisms to the variability of obesity. One hundred and eighteen consecutively enrolled subjects (62 women: mean age, 17.5 +/- 1.6 yr; body mass index range, 16.2-30.1; 56 men: mean age, 17.8 +/- 1.8 yr; body mass index range, 15.4-35.9) were genotyped for the three polymorphisms, and their body mass index, sum of 4 skinfolds, fat-free mass, percent fat mass, serum leptin levels, caloric intake, fat intake, and exercise patterns were determined. Allele frequencies were estimated by the gene-counting method, and genotype distributions between 89 normal weight (body mass index, < or =25 kg/m(2)) and 29 overweight-obese (body mass index, >25 kg/m(2)) subjects were compared using chi(2) test (using codominant, dominant, and recessive models). Analysis of covariance was also performed to evaluate associations between the polymorphisms and body composition variables after controlling for potential confounders. For the Q223R polymorphism, there was a higher prevalence of the R223 allele in the homozygous form among overweight-obese subjects vs. normal weight subjects (20.7% vs. 4.5%; P = 0.01). Furthermore, simple and multiple regression analyses revealed that the R223 allele in the homozygous form is a significant predictor of both body mass index (P = 0.015) and percent fat mass (P = 0.02) even after adjusting for age and gender and explains 4.5% of the variance in percent fat mass and 5% of the variance in body mass index. There was no significant difference in allele frequencies or genotype distributions for the K109R or K656N polymorphisms. These findings support the hypothesis that the Q223R polymorphism (but not the K109R or K656N polymorphism) of the leptin receptor gene is associated with obesity and predicts a small percentage of body weight and body composition variability in a genetically homogeneous population.
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Affiliation(s)
- N Yiannakouris
- Department of Home Economics, Harokopio University, 17671 Athens, Greece
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Abstract
Leptin is an adipocyte-derived protein hormone which not only conveys a signal of the amount of energy stores to the central nervous system but also plays an important role in regulating neuroendocrine function. The importance of leptin in the reproductive system has been suggested by the reproductive dysfunction associated with leptin deficiency and resistance in both animal models and humans as well as the ability of leptin to accelerate the onset of reproductive function in normal mice. Transgenic mice overexpressing leptin also have accelerated puberty, and leptin administration reverses the fasting-induced suppression of sexual maturation in rodents, indicating that leptin may serve as the critical link between sufficient energy stores and proper functioning of the reproductive system. Normal women have a pulsatile release pattern of leptin that is significantly associated with the variations in luteinizing hormone (LH) and estradiol levels. In various animal models, leptin administration restores the LH pulsatility pattern which is suppressed during fasting, indicating a hypothalamic site of action since LH pulsatility is under the control of gonadotropin-releasing hormone (GnRH). In humans, leptin has been administered to a 9-year-old leptin-deficient girl, resulting in a gonadotropin secretory pattern consistent with early puberty. While in vitro experiments with hypothalamic explants and a GnRH-secreting neuronal cell line have shown that leptin can directly stimulate GnRH secretion, the lack of leptin receptors on GnRH neurons suggests that leptin may act through other hypothalamic neuropeptides. Several neuropeptides which act as downstream effectors of leptin have been investigated, and recent studies indicate that cocaine and amphetamine-regulated transcript may be such a mediator of leptin's effect on GnRH. Leptin receptors have also been identified in human pituitaries, and leptin may influence LH release from the pituitary. However, the current evidence is conflicting, and further studies are needed in order to clarify leptin's role at the level of the pituitary. Thus, accumulating evidence suggests that leptin can regulate gonadotropin levels, and its secretion may, in turn, be influenced by GnRH or gonadal steroids but appears to be independent of LH control.
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Affiliation(s)
- J L Chan
- Division of Endocrinology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA.
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Zeng L, Sachdev P, Yan L, Chan JL, Trenkle T, McClelland M, Welsh J, Wang LH. Vav3 mediates receptor protein tyrosine kinase signaling, regulates GTPase activity, modulates cell morphology, and induces cell transformation. Mol Cell Biol 2000; 20:9212-24. [PMID: 11094073 PMCID: PMC102179 DOI: 10.1128/mcb.20.24.9212-9224.2000] [Citation(s) in RCA: 111] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
A recently reported new member of the Vav family proteins, Vav3 has been identified as a Ros receptor protein tyrosine kinase (RPTK) interacting protein by yeast two-hybrid screening. Northern analysis shows that Vav3 has a broad tissue expression profile that is distinct from those of Vav and Vav2. Two species of Vav3 transcripts, 3.4 and 5.4 kb, were detected with a differential expression pattern in various tissues. Transient expression of Vav in 293T and NIH 3T3 cells demonstrated that ligand stimulation of several RPTKs (epidermal growth factor receptor [EGFR], Ros, insulin receptor [IR], and insulin-like growth factor I receptor [IGFR]) led to tyrosine phosphorylation of Vav3 and its association with the receptors as well as their downstream signaling molecules, including Shc, Grb2, phospholipase C (PLC-gamma), and phosphatidylinositol 3 kinase. In vitro binding assays using glutathione S-transferase-fusion polypeptides containing the GTPase-binding domains of Rok-alpha, Pak, or Ack revealed that overexpression of Vav3 in NIH 3T3 cells resulted in the activation of Rac-1 and Cdc42 whereas a deletion mutant lacking the N-terminal calponin homology and acidic region domains activated RhoA and Rac-1 but lost the ability to activate Cdc42. Vav3 induced marked membrane ruffles and microspikes in NIH 3T3 cells, while the N-terminal truncation mutants of Vav3 significantly enhanced membrane ruffle formation but had a reduced ability to induce microspikes. Activation of IR further enhanced the ability of Vav3 to induce membrane ruffles, but IGFR activation specifically promoted Vav3-mediated microspike formation. N-terminal truncation of Vav3 activated its transforming potential, as measured by focus-formation assays. We conclude that Vav3 mediates RPTK signaling and regulates GTPase activity, its native and mutant forms are able to modulate cell morphology, and it has the potential to induce cell transformation.
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Affiliation(s)
- L Zeng
- Department of Microbiology, Mount Sinai School of Medicine, New York, New York 10029, USA
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Nguyen KT, Wang WJ, Chan JL, Wang LH. Differential requirements of the MAP kinase and PI3 kinase signaling pathways in Src- versus insulin and IGF-1 receptors-induced growth and transformation of rat intestinal epithelial cells. Oncogene 2000; 19:5385-97. [PMID: 11103940 DOI: 10.1038/sj.onc.1203911] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
There have been few studies on the specific signaling pathways involved in the transformation of epithelial cells by oncogenic protein tyrosine kinases. Here we investigate the requirement of MAP (MAPK) and phosphatidylinositol 3- (PI3K) kinases in the transformation of rat intestinal epithelial (RIE) cells by oncogenic forms of insulin receptor (gag-IR), insulin-like growth factor-1 receptor (gag-IGFR), and v-Src. MAPK is not significantly activated in cells transformed by gag-IR and gag-IGFR but is activated in v-Src transformed cells. Treatment with PD98059, a MEK inhibitor, at concentrations where MAPK activity was reduced below the basal level showed that MAPK is partially required for the monolayer growth of parental and transformed RIE cells. However, MAPK is not essential for the focus forming ability of the three oncogene-transformed cells. It is also not necessary for the colony forming ability of gag-IR- and gag-IGFR-, but is partially required for v-Src-transformed cells. PI3K is significantly activated in all three oncogene transformed RIE cells. LY294002, a PI3K inhibitor, potently inhibited monolayer growth of all three oncogene-transformed cells. However, at concentrations of LY294002 where activated forms of Akt, a downstream component of the PI3K pathway, were undetectable, colony and focus forming abilities of the v-Src-RIE cells were only slightly affected whereas those of gag-IR/IGFR-RIE cells were greatly inhibited. These results were confirmed using a different pharmacological inhibitor, wortmannin, and a dominant negative form of PI3K, Ap85. Similarly, rapamycin, known to inhibit p70S6 kinase, a downstream component of the PI3K-Akt pathway, also inhibited gag-IR/IGFR-induced, but not v-Src-induced, focus and colony formation. We conclude that the MAPK and PI3K signaling pathways are differentially required for transformation of RIE cells by oncogenic IR and IGFR versus Src and the pattern of requirements is different from that of fibroblast transformation.
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Affiliation(s)
- K T Nguyen
- Department of Microbiology, Mount Sinai School of Medicine, New York, NY 10029, USA
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Chan JL, Liu AB. Anatomical correlates of alien hand syndromes. Neuropsychiatry Neuropsychol Behav Neurol 1999; 12:149-55. [PMID: 10456797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Abstract
OBJECTIVE The objective of this study was to correlate various alien hand syndromes (AHS) with sites of lesion in 16 patients with anterior cerebral artery (ACA) territory infarction. BACKGROUND All previous reports of AHS were case studies. Their clinico-anatomic correlations were still controversial. While the callosal lesion appears necessary for various types of AHS, which portion of the corpus callosum is associated with which syndrome is still not yet completely resolved. METHOD Sixteen patients with ACA territory infarction were selected from a stroke registry containing 7355 individuals. They were divided into three lesion groups according to location identified by computed tomography or magnetic resonance imaging: mesial frontal, callosal and combined mesial frontal and callosal. Neurobehavioral examination focused on the presence or absence of grasp reflex, various alien hand signs, intermanual conflict, and callosal disconnection syndrome. By gross visual analysis of the obtained data, a trend for clinicoanatomic correlation emerged. RESULTS Patients with restricted mesial frontal lesions (three subjects), restricted anterior callosal lesions (four subjects) or "restricted" mesial frontal and anterior callosal lesions (two subjects) did not have symptoms of AHS. The remaining seven patients with extensive callosal injury involving the midbody and isthmus all had symptoms of AHS. Four of the patients with relatively isolated callosal involvement showed intermanual conflict (IMC) associated with a callosal AHS, while the remaining three patients with additional lesions involving the mesial frontal cortex showed impulsive reaching and grasping behaviors of the contralesional hand (a component of frontal AHS) and IMC (a component of callosal AHS). CONCLUSIONS A comparison of the lesions and symptoms of seven patients in two different groups shows that mesial frontal and anterior callosal (genu and rostral body) lesions are associated with a contralateral frontal AHS. Isolated involvement of the callosal midbody and isthmus is associated with a callosal AHS. When the mesial frontal cortex and corpus callosum (genu and whole body) are extensively involved, a mixed frontal and callosal AHS may occur in the same patient.
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Affiliation(s)
- J L Chan
- Department of Neurology, Taipei Municipal Yang-Ming Hospital and Taipei Medical College, Taiwan
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40
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Abstract
Collagenous colitis is a recently described form of chronic inflammatory bowel disease. Other inflammatory bowel disorders are associated with increased risk of colorectal and extracolonic malignancies, but this has not been evaluated in collagenous colitis. Colorectal and extracolonic malignancies were identified in 117 patients with collagenous colitis from the Johns Hopkins Registry. The incidence rates of identified tumors, overall incidence rate of tumors, and overall mortality were then compared with general population through person year analysis with adjustment for population. No cases of colorectal cancer were found in collagenous colitis patients during a mean follow-up period of 7.0 years (range 2-12 years) after the diagnosis of colitis. Two patients developed colorectal cancer prior to the diagnosis of colitis, but no increase in life-time relative risk of colorectal cancer was found (relative risk 0.52; 95% confidence limits 0.05-1.5). An increased relative risk of lung cancer in women (relative risk 3.7; 95% confidence limits 1.0-9.6; p = 0.048) was noted. The relative risk of overall malignancy and overall mortality was not different than the general population. In collagenous colitis patients the life-time relative risk of colorectal cancer and the relative risk after the diagnosis of colitis with a mean observation period of 7 years was not increased. An increase in relative risk of lung cancer in women with collagenous colitis argues for further investigation of the role of smoking and other factors in this disorder.
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Affiliation(s)
- J L Chan
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA
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Chan JL, Saénz L, Talavera C, Hornung R, Robert M, Oropeza C. Regeneration of coconut (Cocos nucifera L.) from plumule explants through somatic embryogenesis. Plant Cell Rep 1998; 17:515-521. [PMID: 30736628 DOI: 10.1007/s002990050434] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
A protocol was developed for coconut regeneration using plumules from mature zygotic embryos as explants, and media with the synthetic growth regulators 2,4-dichlorophenoxyacetic acid and 6-benzylaminopurine. Evidence for the regeneration process from these tissues occurring through somatic embryogenesis is presented. The somatic embryos were capable of germination, subsequent development into plantlets and successful transfer to the nursery. The yields were larger, nearly twofold for calli and over tenfold for calli bearing somatic embryos, than those previously reported with inflorescence explants. The present protocol thus represents an improvement in time and yield over previous protocols. Even though plumule explants are not the ideal tissue source due to possible genetic heterogeneity, the improvements made here may be applicable to tissues from mature plants. In addition, micropropagation of coconut using plumules is potentially useful when they are obtained from fruit produced from selected parents of outstanding performance, such as those resistant to diseases.
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Affiliation(s)
- J L Chan
- Centro de Investigación Científica de Yucatán, Apartado Postal 87, Cordemex, 97310 Mérida, Yucatán, México Fax no.: +52-99-81-39-00 E-mail: , , , , , , XX
| | - L Saénz
- Centro de Investigación Científica de Yucatán, Apartado Postal 87, Cordemex, 97310 Mérida, Yucatán, México Fax no.: +52-99-81-39-00 E-mail: , , , , , , XX
| | - C Talavera
- Centro de Investigación Científica de Yucatán, Apartado Postal 87, Cordemex, 97310 Mérida, Yucatán, México Fax no.: +52-99-81-39-00 E-mail: , , , , , , XX
| | - R Hornung
- Department of Horticulture, Wye College, University of London, Wye, Ashford, Kent, TN25 5AH, UK, , , , , , GB
| | - M Robert
- Centro de Investigación Científica de Yucatán, Apartado Postal 87, Cordemex, 97310 Mérida, Yucatán, México Fax no.: +52-99-81-39-00 E-mail: , , , , , , XX
| | - C Oropeza
- Centro de Investigación Científica de Yucatán, Apartado Postal 87, Cordemex, 97310 Mérida, Yucatán, México Fax no.: +52-99-81-39-00 E-mail: , , , , , , XX
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42
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Wu Y, Li RC, Maffulli N, Chan KM, Chan JL. Relationship between isokinetic concentric and eccentric contraction modes in the knee flexor and extensor muscle groups. J Orthop Sports Phys Ther 1997; 26:143-9. [PMID: 9276855 DOI: 10.2519/jospt.1997.26.3.143] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
We investigated whether in normal subjects isokinetic concentric and eccentric strength variables were related in order to have a better picture in relation to rehabilitation and possible injury prevention. We studied the relationship between isokinetic concentric and eccentric peak torque, total work, and average power of knee extension and knee flexion at 60 degrees/sec and 120 degrees/sec in 42 young Chinese adults (22 males, age = 27 +/- 6.9 years; 20 females, age = 24.9 +/- 5.05 years) using the Cybex 6000 isokinetic dynamometer. Repeated analysis of covariance was used to compare the means between concentric and eccentric variables adjusted by limb dominance, speed of testing, and the muscle groups tested. A highly significant correlation was found between all concentric and eccentric variables, with correlation coefficients (r) ranging from 0.67 to 0.93. All but two of the eccentric variables were significantly greater than the concentric variables. Concentric and eccentric knee flexion to knee extension (H:Q) ratios were poorly correlated, with r ranging from 0.359 to 0.645. Although there is an acceptably high correlation between isokinetic concentric and eccentric strength variables of knee flexion and extension in young healthy individuals, we recommend measuring concentric and eccentric strength to plan a proper rehabilitation program and to assess muscle groups in a given contraction mode.
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Affiliation(s)
- Y Wu
- Haushan Hospital, Shanghai Medical University, People's Republic of China
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43
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Abstract
Three patients with mesial frontal and extensive callosal lesions due to anterior cerebral artery infarction manifested an alien hand syndrome (AHS) with varied features. Patient 1 with left hemispheric lesion showed right hand's impulsive reaching and grasping and left hand's antagonistic movements to the right (intermanual conflict; IMC). Patients 2 and 3 with right hemispheric lesion manifested a left hemihypokinesia which was thought to have suppressed the frequency and amplitude or even the occurrence of left hand's reaching and grasping. IMC and other left hand's non-antagonistic, irrelevant movements to the right remained. Because the term "IMC" is often misused and not strictly defined, its association with right hand's reaching and grasping is quite uncommon, its significance as a sign of callosal disconnection is not well validated, and because left hand's reaching and grasping tend to be suppressed by motor neglect, a trend may then develop for the right hand to be the sole focus of pathological behaviour in patients with the so-called frontal AHS (Feinberg, Schindler, Flanagan et al., 1992).
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Affiliation(s)
- J L Chan
- Department of Neurology, Chang Gung Memorial Hospital, Taipei, Taiwan
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Zong CS, Chan JL, Yang SK, Wang LH. Mutations of Ros differentially effecting signal transduction pathways leading to cell growth versus transformation. J Biol Chem 1997; 272:1500-6. [PMID: 8999820 DOI: 10.1074/jbc.272.3.1500] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
The signaling functions of the oncogenic protein-tyrosine kinase v-Ros were studied by systematically mutating the tyrosine residues in its cytoplasmic domain. The carboxyl mutation of Tyr-564 produces the most pronounced inhibitory effect on v-Ros autophosphorylation and interaction with phospholipase Cgamma. A cluster of 3 tyrosine residues, Tyr-414, Tyr-418, and Tyr-419, within the PTK domain of v-Ros plays an important role in modulating its kinase activity. The mutant F419 and the mutant DI, deleting 6-amino acids near the catalytic loop, retain wild type protein tyrosine kinase and mitogenic activities, but have dramatically reduced oncogenicity. Both mutant proteins are able to phosphorylate or activate components in the Ras/microtubule-associated protein kinase signaling pathway. However, F419 mutant protein is unable to phosphorylate insulin receptor substrate 1 (IRS-1) or promote association of IRS-1 with phosphatidylinositol 3-kinase. This tyrosine residue in the context of the NDYY motif may define a novel recognition site for IRS-1. Both F419 and DI mutants display impaired ability to induce tyrosine phosphorylation of a series of cytoskeletal and cell-cell interacting proteins. Thus the F419 and DI mutations define v-Ros sequences important for cytoskeleton signaling, the impairment of which correlates with the reduced cell transforming ability.
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Affiliation(s)
- C S Zong
- Department of Microbiology, Mount Sinai School of Medicine, New York, New York 10029, USA
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Chan JL, Lai M, Wang LH. Effect of dimerization on signal transduction and biological function of oncogenic Ros, insulin, and insulin-like growth factor I receptors. J Biol Chem 1997; 272:146-53. [PMID: 8995240 DOI: 10.1074/jbc.272.1.146] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
The avian sarcoma virus UR2 codes for an oncogenic Gag-Ros fusion protein-tyrosine kinase (PTK). We have previously derived two retroviruses, T6 and NM1, coding for oncogenic Gag-insulin receptor and Gag-insulin-like growth factor I receptor (IGFR) fusion proteins, respectively. The Gag-IGFR fusion protein dimerizes, whereas Gag-Ros does not. To identify sequences affecting dimerization and the effect of dimerization on signaling and biological functions, we generated recombinants exchanging the extracellular and transmembrane sequences among the three fusion receptors. The presence of multiple cysteines in the Gag sequence appears to preclude dimerization, since deletion of the 3' cysteine residue allows for dimerization. Most of the chimeric receptors retain high PTK activity and induce transformation regardless of their configuration on the cell surface. UT, a UR2/T6 chimera, retained mitogenic activity but has a markedly reduced transforming ability, while UN7, a UR2/NM1 recombinant, which also harbors Y950F and F951S mutations in IGFR, exhibits dramatic reductions in both activities. All of the fusion receptors can phosphorylate insulin receptor substrate 1 and activate PI 3-kinase. UT protein induces Shc phosphorylation, whereas UN7 protein does not, but both are unable to activate mitogen-activated protein kinase. Our results show that overexpressed oncogenic Gag-fusion receptors do not require dimerization for their signaling and transforming functions and that the extracellular and transmembrane sequences of a receptor PTK can affect its specific substrate interactions.
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Affiliation(s)
- J L Chan
- Department of Microbiology, Mount Sinai School of Medicine, New York, New York 10029, USA
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Li RC, Wu Y, Maffulli N, Chan KM, Chan JL. Eccentric and concentric isokinetic knee flexion and extension: a reliability study using the Cybex 6000 dynamometer. Br J Sports Med 1996; 30:156-60. [PMID: 8799603 PMCID: PMC1332382 DOI: 10.1136/bjsm.30.2.156] [Citation(s) in RCA: 82] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To determine the reliability of the Cybex 6000 isokinetic dynamometer in measuring the knee muscle performance concentrically and eccentrically. METHODS 18 male and 12 female subjects with no previous knee injuries, who had not previously undergone any isokinetic testing, were studied. The flexor and extensor muscles groups of both knees were tested at 60 degrees s-1 and 120 degrees s-1 with the continuous concentric-eccentric cycle testing protocol. Variables studied included peak torque, total work, and average power. The interclass correlation coefficient (ICC 2,1) was used to determine the reliability with P < 0.05. RESULTS Peak torque showed significantly greater ICC than the total work and average power, with test-retest reliability ranging from 0.82 to 0.91 for peak torque, from 0.76 to 0.89 for total work, and 0.71 to 0.88 for average power. Average variability for the three variables studied ranged from 9% to 14%. The ICCs for the three variables studied were significantly greater at 120 degrees s-1. The knee extensor muscle group showed greater test-retest reliability, and the results of isokinetic testing in the concentric contraction mode were more reproducible. CONCLUSIONS The Cybex 6000 isokinetic dynamometer shows high reliability in measuring isokinetic concentric and eccentric variables. Some fluctuation should be allowed when evaluating variations of muscle performance between tests.
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Affiliation(s)
- R C Li
- Hong Kong Centre of Sports Medicine and Sports Science, Hong Kong
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47
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Xiong Q, Chan JL, Zong CS, Wang LH. Two chimeric receptors of epidermal growth factor receptor and c-Ros that differ in their transmembrane domains have opposite effects on cell growth. Mol Cell Biol 1996; 16:1509-18. [PMID: 8657124 PMCID: PMC231135 DOI: 10.1128/mcb.16.4.1509] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Two chimeric receptors, ER1 and ER2, were constructed. ER1 contains the extracellular and transmembrane (TM) domains derived from epidermal growth factor receptor and the cytoplasmic domain from c-Ros; ER2 is identical to ER1 except that its TM domain is derived from c-Ros. Both chimeras can be activated by epidermal growth factor and are capable of activating or phosphorylating an array of cellular signaling proteins. Both chimeras promote colony formation in soft agar with about equal efficiency. Surprisingly, ER1 inhibits while ER2 stimulates cell growth on monolayer culture. Cell cycle analysis revealed that all phases, in particular the S and G2/M phases, of the cell cycle in ER1 cells were elongated whereas G1 phase of ER2 cells was shortened threefold. Comparison of signaling pathways mediated by the two chimeras revealed several differences. Several early signaling proteins are activated or phosphorylated to a higher extent in ER1 than in ER2 cells in response to epidermal growth factor. ER1 is less efficiently internalized and remains tyrosine phosphorylated for a longer time than ER2. However, phosphorylation of the 66-kDa She protein, activation of mitogen activated protein kinase, and induction of c-fos and c-jun occur either to a lesser extent or for a shorter time in ER1 cells. Cellular protein phosphorylation patterns are also different in ER1 and ER2 cells. In particular, a 190-kDa Shc-associated protein is tyrosine phosphorylated in ER2 but not in ER1 cells. Our results indicate that the TM domains have a profound effect on the signal transduction and biological activity of those chimeric receptors. The results also imply that sustained stimulation of ER1 due to its retarded internalization apparently triggers an inhibitory response that dominantly counteracts the receptor-mediated mitogenic signals. These two chimeras, expressed at similar levels in the same cell type but having opposite effects on cell growth, provide an ideal system to study the mechanism by which a protein tyrosine kinase inhibits cell growth.
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Affiliation(s)
- Q Xiong
- Department of Microbiology, Mount Sinai School of Medicine, New York, New York 10029, USA
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48
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Chan JL, Chen RS, Ng KK. Leg manifestation in alien hand syndrome. J Formos Med Assoc 1996; 95:342-6. [PMID: 8935307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
A patient with left alien hand syndrome (AHS) accompanied by leg symptoms due to right anterior cerebral artery territory infarction is reported. Magnetic resonance imaging demonstrated that the responsible lesion involved the right anterior cingulate gyrus, supplementary motor area, medical prefrontal cortex and corpus callosum extending from the genu to the isthmus. The leg symptoms included: 1) motor perseveration manifesting as compulsive straight walking with difficulty stopping on command; 2) dissociation between mind and action resulting in going to unintended places with subsequent complaints of poor memory not due to spatial disorientation; 3) discrepancy between verbal and actual leg motor responses to auditory verbal suggestions; and 4) movement dissociation between the legs resulting in transient standing still or brief sticking to the ground, a situation simulating akinesia. As the legs usually perform together to coordinate movements of standing and walking, unlike the hands performing well-learned, skilled unimanual or bimanual coordinating movements, the counterpart in the leg of the alien hand sign in AHS was not manifested. Nevertheless, in the presence of AHS, the associated leg symptoms bear similar neurobehavioral features and should be dealt with on equal terms.
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Affiliation(s)
- J L Chan
- Department of Neurology, Chang Gung Memorial Hospital and College of Medicine and Technology, Taipei, Taiwan, ROC
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Jiang Y, Chan JL, Zong CS, Wang LH. Effect of tyrosine mutations on the kinase activity and transforming potential of an oncogenic human insulin-like growth factor I receptor. J Biol Chem 1996; 271:160-7. [PMID: 8550552 DOI: 10.1074/jbc.271.1.160] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
The tyrosines in the cytoplasmic domain of an oncogenic human insulin-like growth factor I receptor (gag-IGFR) were systematically mutated to phenylalanines to investigate the role of those tyrosines in the enzymatic and biological function of the gag-IGFR. Our results indicate that tyrosines 1131, 1135, 1136, and 1221 are important for the receptor protein-tyrosine kinase (PTK) activity. However, mutation of Tyr-1136 only slightly affects the kinase activity but dramatically reduces the transforming ability and overall substrate phosphorylation, in particular, annexin II, which is strongly phosphorylated by the gag-IGFR but not by the Phe-1136 mutant. Single mutation of either Tyr-943 or Tyr-950 resulted in significantly reduced phosphorylation of the receptor but not on its PTK activity or transforming ability. Tyr-950 together with its surrounding sequence is involved in mediating the interaction between the gag-IGFR and insulin receptor substrate 1. Our data also suggest that Tyr-1316 is involved in phosphorylation of phospholipase C-gamma, which is, however, not important for cell transforming activity. Overall, our study has identified several tyrosine residues of IGFR important for its PTK activity and substrate interaction. The transforming potential of the gag-IGFR correlates well with its ability to phosphorylate overall cellular substrates and to activate phosphatidylinositol 3-kinase via insulin receptor substrate 1.
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Affiliation(s)
- Y Jiang
- Department of Microbiology, Mount Sinai School of Medicine, New York, New York 10029, USA
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50
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Abstract
Five cases of unilateral intracranial internal carotid artery (ICA) occlusion received both carotid angiographic and ultrasonographic studies. The Doppler examination showed that the resistive index (RI) of the common carotid artery (CCA) and ICA was higher but the peak systolic velocity was lower on the diseased side as compared with the normal side. Absence of the diastolic phase was found in the CCA flow in 2 cases and in the ICA flow in 3 cases on the diseased side. The mean CCA flow volume on the diseased side (271 +/- 82 mL/min) was half or less than that on the normal side (680 +/- 86 mL/min) (P < 0.01). The flow volume of the diseased ICA (49 +/- 20 mL/min) was markedly lower than that of the normal side (344 +/- 49 mL/min) (P < 0.01) and was also less than that of the ipsilateral external carotid artery (ECA) (129 +/- 43 mL/min). The Doppler ophthalmic artery flow all showed a forward direction. The authors propose that the following extracranial carotid ultrasonographic findings may be helpful in the prediction of intracranial carotid artery occlusion: (1) diminished frequencies, increased RI, and a more than 50% reduction of flow volume in the CCA as compared with the opposite side; (2) diminished frequencies to loss of the diastolic phase, a more than 50% reduction of the flow volume, and reversed ICA/ECA flow volume in the ICA as compared with the opposite side; and (3) a forward Doppler ophthalmic artery flow.
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Affiliation(s)
- T H Lee
- Department of Neurology, Chang Gung Memorial Hospital, Taipei, Taiwan
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