1
|
Haldar S, Agrawal H, Saha S, Straughn AR, Roy P, Kakar SS. Overview of follicle stimulating hormone and its receptors in reproduction and in stem cells and cancer stem cells. Int J Biol Sci 2022; 18:675-692. [PMID: 35002517 PMCID: PMC8741861 DOI: 10.7150/ijbs.63721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Accepted: 10/21/2021] [Indexed: 11/05/2022] Open
Abstract
Follicle stimulating hormone (FSH) and its receptor (FSHR) have been reported to be responsible for several physiological functions and cancers. The responsiveness of stem cells and cancer stem cells towards the FSH-FSHR system make the function of FSH and its receptors more interesting in the context of cancer biology. This review is comprised of comprehensive information on FSH-FSHR signaling in normal physiology, gonadal stem cells, cancer cells, and potential options of utilizing FSH-FSHR system as an anti-cancer therapeutic target.
Collapse
Affiliation(s)
- Swati Haldar
- Molecular Endocrinology Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Uttarakhand 247667, India.,Current address: Drug Discovery and Development Division, Patanjali Research Institute, Haridwar, Uttarakhand 249405
| | - Himanshu Agrawal
- Molecular Endocrinology Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Uttarakhand 247667, India
| | - Sarama Saha
- Department of Biochemistry, All India Institute of Medical Sciences Rishikesh, Uttarakhand 249203, India
| | - Alex R Straughn
- Department of Physiology, James Graham Brown Cancer Center, University of Louisville, Louisville, KY 40202, USA
| | - Partha Roy
- Molecular Endocrinology Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Uttarakhand 247667, India
| | - Sham S Kakar
- Department of Physiology, James Graham Brown Cancer Center, University of Louisville, Louisville, KY 40202, USA
| |
Collapse
|
2
|
Liang A, Plewes MR, Hua G, Hou X, Blum HR, Przygrodzka E, George JW, Clark KL, Bousfield GR, Butnev VY, May JV, Davis JS. Bioactivity of recombinant hFSH glycosylation variants in primary cultures of porcine granulosa cells. Mol Cell Endocrinol 2020; 514:110911. [PMID: 32553947 PMCID: PMC7418035 DOI: 10.1016/j.mce.2020.110911] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Revised: 06/05/2020] [Accepted: 06/05/2020] [Indexed: 12/16/2022]
Abstract
Previous studies have reported hypo-glycosylated FSH and fully-glycosylated FSH to be naturally occurring in humans, and these glycoforms exist in changing ratios over a woman's lifespan. The precise cellular and molecular effects of recombinant human FSH (hFSH) glycoforms, FSH21 and FSH24, have not been documented in primary granulosa cells. Herein, biological responses to FSH21 and FSH24 were compared in primary porcine granulosa cells. Hypo-glycosylated hFSH21 was significantly more effective than fully-glycosylated hFSH24 at stimulating cAMP accumulation and protein kinase A (PKA) activity, leading to the higher phosphorylation of CREB and β-Catenin. Compared to fully-glycosylated hFSH24, hypo-glycosylated hFSH21 also induced greater levels of transcripts for HSD3B, STAR and INHA, and higher progesterone production. Our results demonstrate that hypo-glycosylated hFSH21 exerts more robust activation of intracellular signals associated with steroidogenesis than fully-glycosylated hFSH24 in primary porcine granulosa cells, and furthers our understanding of the differing bioactivities of FSH glycoforms in the ovary.
Collapse
Affiliation(s)
- Aixin Liang
- Olson Center for Women's Health, Department of Obstetrics and Gynecology, University of Nebraska Medical Center, Omaha, NE, 68198, USA; Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan, 430070, China
| | - Michele R Plewes
- Olson Center for Women's Health, Department of Obstetrics and Gynecology, University of Nebraska Medical Center, Omaha, NE, 68198, USA; Veterans Affairs Nebraska Western Iowa Health Care System, 4101 Woolworth Ave, Omaha, NE, 68105, USA
| | - Guohua Hua
- Olson Center for Women's Health, Department of Obstetrics and Gynecology, University of Nebraska Medical Center, Omaha, NE, 68198, USA; Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan, 430070, China
| | - Xiaoying Hou
- Olson Center for Women's Health, Department of Obstetrics and Gynecology, University of Nebraska Medical Center, Omaha, NE, 68198, USA
| | - Haley R Blum
- Olson Center for Women's Health, Department of Obstetrics and Gynecology, University of Nebraska Medical Center, Omaha, NE, 68198, USA
| | - Emilia Przygrodzka
- Olson Center for Women's Health, Department of Obstetrics and Gynecology, University of Nebraska Medical Center, Omaha, NE, 68198, USA
| | - Jitu W George
- Olson Center for Women's Health, Department of Obstetrics and Gynecology, University of Nebraska Medical Center, Omaha, NE, 68198, USA; Veterans Affairs Nebraska Western Iowa Health Care System, 4101 Woolworth Ave, Omaha, NE, 68105, USA
| | - Kendra L Clark
- Olson Center for Women's Health, Department of Obstetrics and Gynecology, University of Nebraska Medical Center, Omaha, NE, 68198, USA; Veterans Affairs Nebraska Western Iowa Health Care System, 4101 Woolworth Ave, Omaha, NE, 68105, USA
| | - George R Bousfield
- Department of Biological Sciences, Wichita State University, Wichita, KS, 67260, USA
| | - Viktor Y Butnev
- Department of Biological Sciences, Wichita State University, Wichita, KS, 67260, USA
| | - Jeffrey V May
- Department of Biological Sciences, Wichita State University, Wichita, KS, 67260, USA
| | - John S Davis
- Olson Center for Women's Health, Department of Obstetrics and Gynecology, University of Nebraska Medical Center, Omaha, NE, 68198, USA; Veterans Affairs Nebraska Western Iowa Health Care System, 4101 Woolworth Ave, Omaha, NE, 68105, USA.
| |
Collapse
|
3
|
Zariñán T, Butnev VY, Gutiérrez-Sagal R, Maravillas-Montero JL, Martínez-Luis I, Mejía-Domínguez NR, Juárez-Vega G, Bousfield GR, Ulloa-Aguirre A. In Vitro Impact of FSH Glycosylation Variants on FSH Receptor-stimulated Signal Transduction and Functional Selectivity. J Endocr Soc 2020; 4:bvaa019. [PMID: 32342021 PMCID: PMC7175721 DOI: 10.1210/jendso/bvaa019] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Accepted: 02/14/2020] [Indexed: 12/21/2022] Open
Abstract
FSH exists as different glycoforms that differ in glycosylation of the hormone-specific β-subunit. Tetra-glycosylated FSH (FSH24) and hypo-glycosylated FSH (FSH18/21) are the most abundant glycoforms found in humans. Employing distinct readouts in HEK293 cells expressing the FSH receptor, we compared signaling triggered by human pituitary FSH preparations (FSH18/21 and FSH24) as well as by equine FSH (eFSH), and human recombinant FSH (recFSH), each exhibiting distinct glycosylation patterns. The potency in eliciting cAMP production was greater for eFSH than for FSH18/21, FSH24, and recFSH, whereas in the ERK1/2 activation readout, potency was highest for FSH18/21 followed by eFSH, recFSH, and FSH24. In β-arrestin1/2 CRISPR/Cas9 HEK293-KO cells, FSH18/21 exhibited a preference toward β-arrestin-mediated ERK1/2 activation as revealed by a drastic decrease in pERK during the first 15-minute exposure to this glycoform. Exposure of β-arrestin1/2 KO cells to H89 additionally decreased pERK1/2, albeit to a significantly lower extent in response to FSH18/21. Concurrent silencing of β-arrestin and PKA signaling, incompletely suppressed pERK response to FSH glycoforms, suggesting that pathways other than those dependent on Gs-protein and β-arrestins also contribute to FSH-stimulated pERK1/2. All FSH glycoforms stimulated intracellular Ca2+ (iCa2+) accumulation through both influx from Ca2+ channels and release from intracellular stores; however, iCa2+ in response to FSH18/21 depended more on the latter, suggesting differences in mechanisms through which glycoforms promote iCa2+ accumulation. These data indicate that FSH glycosylation plays an important role in defining not only the intensity but also the functional selectivity for the mechanisms leading to activation of distinct signaling cascades.
Collapse
Affiliation(s)
- Teresa Zariñán
- Red de Apoyo a la Investigación (RAI), Universidad Nacional Autónoma de México (UNAM)-Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
| | - Viktor Y Butnev
- Department of Biological Sciences, Wichita State University, Wichita, Kansas, USA
| | - Rubén Gutiérrez-Sagal
- Red de Apoyo a la Investigación (RAI), Universidad Nacional Autónoma de México (UNAM)-Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
| | - José Luis Maravillas-Montero
- Red de Apoyo a la Investigación (RAI), Universidad Nacional Autónoma de México (UNAM)-Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
| | - Iván Martínez-Luis
- Red de Apoyo a la Investigación (RAI), Universidad Nacional Autónoma de México (UNAM)-Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
| | - Nancy R Mejía-Domínguez
- Red de Apoyo a la Investigación (RAI), Universidad Nacional Autónoma de México (UNAM)-Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
| | - Guillermo Juárez-Vega
- Red de Apoyo a la Investigación (RAI), Universidad Nacional Autónoma de México (UNAM)-Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
| | - George R Bousfield
- Department of Biological Sciences, Wichita State University, Wichita, Kansas, USA
| | - Alfredo Ulloa-Aguirre
- Red de Apoyo a la Investigación (RAI), Universidad Nacional Autónoma de México (UNAM)-Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
| |
Collapse
|
4
|
Sacchi S, Tenedini E, Tondelli D, Parenti S, Tagliasacchi D, Xella S, Marsella T, Tagliafico E, La Marca A. Gene expression profiles of human granulosa cells treated with bioequivalent doses of corifollitropin alfa (CFA) or recombinant human follicle-stimulating hormone (recFSH). Gynecol Endocrinol 2019; 35:623-627. [PMID: 30784329 DOI: 10.1080/09513590.2019.1576611] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
Abstract
Using recombinant DNA technologies, a chimeric gene containing the coding sequences of follicle stimulating hormone (FSH) β-subunit and C-terminal peptide of the human chorionic gonadotrophin (hCG) β-subunit have been designed to generate a new gonadotrophin named corifollitropin alfa (CFA). CFA has longer elimination half-life and slower rate of absorption compared with FSH, which makes CFA a long-acting hormone employed as a substitute of the recombinant FSH (recFSH) in the controlled ovarian stimulation (COS). The purpose of this study is to compare the gene expression profiles elicited by bioequivalent doses of CFA or recFSH in primary cultures of human granulosa cells (hGCs). Gonadotrophins exert their functions by binding FSH receptors (FSHRs), activating signaling pathways that increase the cyclic adenosine monophosphate (cAMP) intracellular content. Bioequivalence has been defined as the dose/duration of gonadotrophin treatment able to promote the same amount of intracellular cAMP. hGCs were treated with different doses of either gonadotrophin and the cAMP was measured after different incubation times to establish the bioequivalence. Results obtained by comparing the bioequivalent treatments, showed that CFA is more effective than recFSH in inducing aromatase gene expression after 6 and 24 h from the initial stimulation in agreement with its long-acting characteristic.
Collapse
Affiliation(s)
- Sandro Sacchi
- a Department of Medical and Surgical Sciences for Children and Adults , University of Modena and Reggio Emilia , Modena , Italy
| | - Elena Tenedini
- b Center for Genome Research , University of Modena and Reggio Emilia , Modena , Italy
- c Department of Medical and Surgical Sciences , University of Modena and Reggio Emilia , Modena , Italy
| | - Debora Tondelli
- a Department of Medical and Surgical Sciences for Children and Adults , University of Modena and Reggio Emilia , Modena , Italy
| | - Sandra Parenti
- b Center for Genome Research , University of Modena and Reggio Emilia , Modena , Italy
- c Department of Medical and Surgical Sciences , University of Modena and Reggio Emilia , Modena , Italy
| | - Daniela Tagliasacchi
- a Department of Medical and Surgical Sciences for Children and Adults , University of Modena and Reggio Emilia , Modena , Italy
| | - Susanna Xella
- a Department of Medical and Surgical Sciences for Children and Adults , University of Modena and Reggio Emilia , Modena , Italy
| | - Tiziana Marsella
- a Department of Medical and Surgical Sciences for Children and Adults , University of Modena and Reggio Emilia , Modena , Italy
| | - Enrico Tagliafico
- b Center for Genome Research , University of Modena and Reggio Emilia , Modena , Italy
- c Department of Medical and Surgical Sciences , University of Modena and Reggio Emilia , Modena , Italy
| | - Antonio La Marca
- a Department of Medical and Surgical Sciences for Children and Adults , University of Modena and Reggio Emilia , Modena , Italy
| |
Collapse
|
5
|
Bousfield GR, Harvey DJ. Follicle-Stimulating Hormone Glycobiology. Endocrinology 2019; 160:1515-1535. [PMID: 31127275 PMCID: PMC6534497 DOI: 10.1210/en.2019-00001] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Accepted: 04/16/2019] [Indexed: 01/13/2023]
Abstract
FSH glycosylation varies in two functionally important aspects: microheterogeneity, resulting from oligosaccharide structure variation, and macroheterogeneity, arising from partial FSHβ subunit glycosylation. Although advances in mass spectrometry permit extensive characterization of FSH glycan populations, microheterogeneity remains difficult to illustrate, and comparisons between different studies are challenging because no standard format exists for rendering oligosaccharide structures. FSH microheterogeneity is illustrated using a consistent glycan diagram format to illustrate the large array of structures associated with one hormone. This is extended to commercially available recombinant FSH preparations, which exhibit greatly reduced microheterogeneity at three of four glycosylation sites. Macroheterogeneity is demonstrated by electrophoretic mobility shifts due to the absence of FSHβ glycans that can be assessed by Western blotting of immunopurified FSH. Initially, macroheterogeneity was hoped to matter more than microheterogeneity. However, it now appears that both forms of carbohydrate heterogeneity have to be taken into consideration. FSH glycosylation can reduce its apparent affinity for its cognate receptor by delaying initial interaction with the receptor and limiting access to all of the available binding sites. This is followed by impaired cellular signaling responses that may be related to reduced receptor occupancy or biased signaling. To resolve these alternatives, well-characterized FSH glycoform preparations are necessary.
Collapse
Affiliation(s)
- George R Bousfield
- Department of Biological Sciences, Wichita State University, Wichita, Kansas
- Correspondence: George R. Bousfield, PhD, Department of Biological Sciences, Wichita State University, 1845 Fairmount Street, Wichita, Kansas 67260. E-mail: ; or David J. Harvey, DSc, Target Discovery Institute, Nuffield Department of Medicine, University of Oxford. Roosevelt Drive, Oxford OX3 7FZ, United Kingdom. E-mail:
| | - David J Harvey
- Target Discovery Institute, Nuffield Department of Medicine, Oxford University, Oxford, United Kingdom
- Correspondence: George R. Bousfield, PhD, Department of Biological Sciences, Wichita State University, 1845 Fairmount Street, Wichita, Kansas 67260. E-mail: ; or David J. Harvey, DSc, Target Discovery Institute, Nuffield Department of Medicine, University of Oxford. Roosevelt Drive, Oxford OX3 7FZ, United Kingdom. E-mail:
| |
Collapse
|
6
|
Kim JM, Munkhuu O, Byambaragchaa M, Lee BI, Kim SK, Kang MH, Kim DJ, Min KS. Site-specific roles of N-linked oligosaccharides in recombinant eel follicle-stimulating hormone for secretion and signal transduction. Gen Comp Endocrinol 2019; 276:37-44. [PMID: 30836102 DOI: 10.1016/j.ygcen.2019.03.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 02/27/2019] [Accepted: 03/01/2019] [Indexed: 11/25/2022]
Abstract
Eel follicle-stimulating hormone (eelFSH) is composed of a common α-subunit and a hormone specific β-subunit, both of which contain two N-linked carbohydrate residues. We characterized the biologically active single chains by fusing the α-subunit to the carboxyl terminal region of the eelFSH β-subunit. Expression vectors were constructed and the biological activity of the recombinant hormones (rec-hormones) was characterized using Chinese hamster ovary (CHO) K1 cells expressing the eelFSH receptor gene. Mutagenesis of the individual and double glycosylated sites was performed to determine the functions of the oligosaccharide chains on signal transduction. The absence of the Asn22 (eelFSHβΔ22/α) and Asn5.22 (eelFSHβΔ5.22/α) N-linked oligosaccharide chain in the eelFSH β-subunit completely reduced the secretion level in the medium and cell lysate of CHO-K1 cells. The expression levels of eelFSHβ/α wild-type in CHO suspension (CHO-S) cells was approximately 4-fold higher in CHO-k1 cells. The molecular weight of rec-eelFSHβ/α wild-type by western blotting analysis was found to be 34 kDa. Mutants (β/αΔ56, β/αΔ79, and βΔ5/α) lacking single oligosaccharide sites showed molecular weights that were reduced by approximately 10%. The digestion of N-linked oligosaccharides using PNGaseF treatment showed that the molecular weights of all mutants were reduced to 27-kDa. The oligosaccharide chains in rec-eelFSHβ/α wild-type were modified to a molecular weight of approximately 7-10 kDa in CHO-K1 and CHO-S cells. Oligosaccharide site deletions at positions Asn56 and Asn79 on the α-subunit and Asn5 on the β-subunit were found to play an essential role in cAMP signal transduction through the eelFSH receptor. The EC50 values of Asn56 and Asn5 resulted in a significant decrease in potency to 64% and 53% of the wild type, respectively. Specifically, the removal of the carbohydrates at Asn79 of the α-subunit (β/αΔ79) was drastically reduced to 53.8% of the wild-type levels in maximum response. These results have allowed for the identification of the site-specific roles of carbohydrate residues in eel FSH. Our data suggest that N-linked oligosaccharide chains play a pivotal role in biological activity through the eelFSH receptor as suggested in similar studies of other mammalian FSH hormones.
Collapse
Affiliation(s)
- Jung-Min Kim
- Animal Biotechnology, Graduate School of Future Convergence Technology, Department of Animal Life Science, Institute of Genetic Engineering, Hankyong National University, Ansung 17579, Republic of Korea
| | - Orgilkhatan Munkhuu
- Animal Biotechnology, Graduate School of Future Convergence Technology, Department of Animal Life Science, Institute of Genetic Engineering, Hankyong National University, Ansung 17579, Republic of Korea
| | - Munkhzaya Byambaragchaa
- Animal Biotechnology, Graduate School of Future Convergence Technology, Department of Animal Life Science, Institute of Genetic Engineering, Hankyong National University, Ansung 17579, Republic of Korea
| | - Bae-Ik Lee
- Aquaculture Research Division, National Institute of Fisher Science (NIFS), Busan 46083, Republic of Korea
| | - Shin-Kwon Kim
- Aquaculture Research Division, National Institute of Fisher Science (NIFS), Busan 46083, Republic of Korea
| | - Myung-Hwa Kang
- Department of Food Science and Nutrition, Hoseo University, Asan 31499, Republic of Korea
| | - Dae-Jung Kim
- Jeju Fisheries Research Institute, National Institute of Fisheries Science (NIFS), Jeju 63610, Republic of Korea
| | - Kwan-Sik Min
- Animal Biotechnology, Graduate School of Future Convergence Technology, Department of Animal Life Science, Institute of Genetic Engineering, Hankyong National University, Ansung 17579, Republic of Korea.
| |
Collapse
|
7
|
Campo S, Andreone L, Ambao V, Urrutia M, Calandra RS, Rulli SB. Hormonal Regulation of Follicle-Stimulating Hormone Glycosylation in Males. Front Endocrinol (Lausanne) 2019; 10:17. [PMID: 30761084 PMCID: PMC6361742 DOI: 10.3389/fendo.2019.00017] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2018] [Accepted: 01/11/2019] [Indexed: 11/13/2022] Open
Abstract
The Follicle-Stimulating Hormone plays an important role in the regulation of gametogenesis. It is synthesized and secreted as a family of glycoforms with differing oligosaccharide structure, biological action, and half-life. The presence of these oligosaccharides is absolutely necessary for the full expression of hormone bioactivity at the level of the target cell. The endocrine milieu modulates the glycosylation of this hormone. During male sexual development a progressive increase in FSH sialylation and in the proportion of glycoforms bearing complex oligosaccharides are the main features in this physiological condition. In late puberty, FSH oligosaccharides are largely processed in the medial- and trans-Golgi cisternae of the gonadotrope and remain without changes throughout adult life. In experimental models, the absence of gonads severely affects FSH sialylation; androgen administration is able to restore the characteristics observed under physiological conditions. The expression of ST6 beta-galactoside alpha-2,6-sialyltransferase 1 is hormonally regulated in the male rat; it decreases after short periods of castration but increases markedly at longer periods of androgen deprivation. Although ST3 beta-galactoside alpha-2,3-sialyltransferase 3 is expressed in the male rat pituitary it is not influenced by changes in the endocrine milieu. The oligosaccharide structure of FSH has an impact on the Sertoli cell endocrine activity. In more advanced stages of Sertoli cell maturation, both sialylation and complexity of the oligosaccharides are involved in the regulation of inhibin B production; moreover, FSH glycoforms bearing incomplete oligosaccharides may enhance the stimulatory effect exerted by gonadal growth factors. In this review, we discuss available information on variation of FSH glycosylation and its hormonal regulation under different physiological and experimental conditions, as well as the effect on Sertoli cell endocrine activity.
Collapse
Affiliation(s)
- Stella Campo
- Centro de Investigaciones Endocrinológicas “Dr. César Bergadá” (CEDIE), Buenos Aires, Argentina
- *Correspondence: Stella Campo
| | - Luz Andreone
- Centro de Investigaciones Endocrinológicas “Dr. César Bergadá” (CEDIE), Buenos Aires, Argentina
| | - Verónica Ambao
- Centro de Investigaciones Endocrinológicas “Dr. César Bergadá” (CEDIE), Buenos Aires, Argentina
| | - Mariela Urrutia
- Centro de Investigaciones Endocrinológicas “Dr. César Bergadá” (CEDIE), Buenos Aires, Argentina
| | - Ricardo S. Calandra
- Instituto de Biología y Medicina Experimental (IBYME-CONICET), Buenos Aires, Argentina
| | - Susana B. Rulli
- Instituto de Biología y Medicina Experimental (IBYME-CONICET), Buenos Aires, Argentina
| |
Collapse
|
8
|
Das N, Kumar TR. Molecular regulation of follicle-stimulating hormone synthesis, secretion and action. J Mol Endocrinol 2018; 60:R131-R155. [PMID: 29437880 PMCID: PMC5851872 DOI: 10.1530/jme-17-0308] [Citation(s) in RCA: 78] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 02/07/2018] [Indexed: 12/11/2022]
Abstract
Follicle-stimulating hormone (FSH) plays fundamental roles in male and female fertility. FSH is a heterodimeric glycoprotein expressed by gonadotrophs in the anterior pituitary. The hormone-specific FSHβ-subunit is non-covalently associated with the common α-subunit that is also present in the luteinizing hormone (LH), another gonadotrophic hormone secreted by gonadotrophs and thyroid-stimulating hormone (TSH) secreted by thyrotrophs. Several decades of research led to the purification, structural characterization and physiological regulation of FSH in a variety of species including humans. With the advent of molecular tools, availability of immortalized gonadotroph cell lines and genetically modified mouse models, our knowledge on molecular mechanisms of FSH regulation has tremendously expanded. Several key players that regulate FSH synthesis, sorting, secretion and action in gonads and extragonadal tissues have been identified in a physiological setting. Novel post-transcriptional and post-translational regulatory mechanisms have also been identified that provide additional layers of regulation mediating FSH homeostasis. Recombinant human FSH analogs hold promise for a variety of clinical applications, whereas blocking antibodies against FSH may prove efficacious for preventing age-dependent bone loss and adiposity. It is anticipated that several exciting new discoveries uncovering all aspects of FSH biology will soon be forthcoming.
Collapse
Affiliation(s)
- Nandana Das
- Division of Reproductive Sciences, University of Colorado Anschutz Medical Campus, Aurora, Colorado 80045, U.S.A
| | - T. Rajendra Kumar
- Division of Reproductive Sciences, University of Colorado Anschutz Medical Campus, Aurora, Colorado 80045, U.S.A
- Division of Reproductive Endocrinology and Infertility, University of Colorado Anschutz Medical Campus, Aurora, Colorado 80045, U.S.A
- Department of Obstetrics and Gynecology, University of Colorado Anschutz Medical Campus, Aurora, Colorado 80045, U.S.A
- Author for Correspondence: T. Rajendra Kumar, PhD, Edgar L. and Patricia M. Makowski Professor, Associate Vice-Chair of Research, Department of Obstetrics & Gynecology, University of Colorado Anschutz Medical Campus, Mail Stop 8613, Research Complex 2, Room # 15-3000B, 12700 E. 19th Avenue, Aurora, CO 80045, USA, Tel: 303-724-8689,
| |
Collapse
|
9
|
Bousfield GR, May JV, Davis JS, Dias JA, Kumar TR. In Vivo and In Vitro Impact of Carbohydrate Variation on Human Follicle-Stimulating Hormone Function. Front Endocrinol (Lausanne) 2018; 9:216. [PMID: 29867757 PMCID: PMC5960776 DOI: 10.3389/fendo.2018.00216] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Accepted: 04/17/2018] [Indexed: 12/11/2022] Open
Abstract
Human follicle-stimulating hormone (FSH) exhibits both macro- and microheterogeneity in its carbohydrate moieties. Macroheterogeneity results in three physiologically relevant FSHβ subunit variants, two that possess a single N-linked glycan at either one of the two βL1 loop glycosylation sites or one with both glycans. Microheterogeneity is characterized by 80 to over 100 unique oligosaccharide structures attached to each of the 3 to 4 occupied N-glycosylation sites. With respect to its receptor, partially glycosylated (hypo-glycosylated) FSH variants exhibit higher association rates, greater apparent affinity, and greater occupancy than fully glycosylated FSH. Higher receptor binding-activity is reflected by greater in vitro bioactivity and, in some cases, greater in vivo bioactivity. Partially glycosylated pituitary FSH shows an age-related decline in abundance that may be associated with decreased fertility. In this review, we describe an integrated approach involving genetic models, in vitro signaling studies, FSH biochemistry, relevance of physiological changes in FSH glycoform abundance, and characterize the impact of FSH macroheterogeneity on fertility and reproductive aging. We will also address the controversy with regard to claims of a direct action of FSH in mediating bone loss especially at the peri- and postmenopausal stages.
Collapse
Affiliation(s)
- George R. Bousfield
- Department of Biological Sciences, Wichita State University, Wichita, KS, United States
- *Correspondence: George R. Bousfield,
| | - Jeffrey V. May
- Department of Biological Sciences, Wichita State University, Wichita, KS, United States
| | - John S. Davis
- Department of Obstetrics and Gynecology, University of Nebraska Medical Center, Omaha, NE, United States
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, United States
- Nebraska-Western Iowa Health Care System, Omaha, NE, United States
| | - James A. Dias
- Department of Biomedical Sciences, School of Public Health, University at Albany, Albany, NY, United States
| | - T. Rajendra Kumar
- Department of Obstetrics and Gynecology, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
| |
Collapse
|
10
|
Andreone L, Ambao V, Pellizzari EH, Loreti N, Cigorraga SB, Campo S. Role of FSH glycan structure in the regulation of Sertoli cell inhibin production. Reproduction 2017; 154:711-721. [PMID: 28855248 DOI: 10.1530/rep-17-0393] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Revised: 08/21/2017] [Accepted: 08/30/2017] [Indexed: 01/16/2023]
Abstract
Variations in follicle-stimulating hormone (FSH) carbohydrate composition and structure are associated with important structural and functional changes in Sertoli cells (SCs) during sexual maturation. The aim of the present study was to investigate the impact of FSH oligosaccharide structure and its interaction with gonadal factors on the regulation of monomeric and dimeric inhibin production at different maturation stages of the SC. Recombinant human FSH (rhFSH) glycosylation variants were isolated according to their sialylation degree (AC and BA) and complexity of oligosaccharides (CO and HY). Native rhFSH stimulated inhibin α-subunit (Pro-αC) but did not show any effect on inhibin B (INHB) production in immature SCs isolated from 8-day-old rats. Activin A stimulated INHB and had a synergistic effect on FSH to stimulate Pro-αC. The less acidic/sialylated rhFSH charge analogues, BA, were the only charge analogue mix that stimulated INHB as well as the most potent stimulus for Pro-αC production. Native rhFSH stimulated both Pro-αC and INHB in SCs at a more advanced maturation stage, isolated from 20-day-old rats. In these cells, all rhFSH glycosylation variants increased INHB and Pro-αC production, even in the presence of growth factors. The BA preparation exerted a more marked stimulatory effect on INHB and Pro-αC than the AC. Glycoforms bearing high mannose and hybrid-type oligosaccharides, HY, stimulated INHB and Pro-αC more effectively than those bearing complex oligosaccharides, CO, even in the presence of gonadal growth factors. These findings demonstrate the modulatory effect of FSH oligosaccharide structure on the regulation of inhibin production in the male gonad.
Collapse
Affiliation(s)
| | - Verónica Ambao
- Centro de Investigaciones Endocrinológicas 'Dr. Cesar Bergadá' (CEDIE-CONICET) Hospital de Niños 'R. Gutiérrez', Buenos Aires, Argentina
| | - Eliana H Pellizzari
- Centro de Investigaciones Endocrinológicas 'Dr. Cesar Bergadá' (CEDIE-CONICET) Hospital de Niños 'R. Gutiérrez', Buenos Aires, Argentina
| | - Nazareth Loreti
- Centro de Investigaciones Endocrinológicas 'Dr. Cesar Bergadá' (CEDIE-CONICET) Hospital de Niños 'R. Gutiérrez', Buenos Aires, Argentina
| | - Selva B Cigorraga
- Centro de Investigaciones Endocrinológicas 'Dr. Cesar Bergadá' (CEDIE-CONICET) Hospital de Niños 'R. Gutiérrez', Buenos Aires, Argentina
| | - Stella Campo
- Centro de Investigaciones Endocrinológicas 'Dr. Cesar Bergadá' (CEDIE-CONICET) Hospital de Niños 'R. Gutiérrez', Buenos Aires, Argentina
| |
Collapse
|
11
|
Abstract
SummaryGonadotropins are the key regulators of ovarian follicles development. They are applied in therapeutic practice in assisted reproductive technology clinics. In the present review we discuss the basic gonadotropic hormones – recombinant human follicle-stimulating hormone, its derivatives, luteinizing hormone and gonadotropin serum of pregnant mares, their origin, and application in ovarian follicle systems inin vitroculture systems.
Collapse
|
12
|
Lira-Albarrán S, Larrea-Schiavon MF, González L, Durand M, Rangel C, Larrea F. The effects of levonorgestrel on FSH-stimulated primary rat granulosa cell cultures through gene expression profiling are associated to hormone and folliculogenesis processes. Mol Cell Endocrinol 2017; 439:337-345. [PMID: 27663078 DOI: 10.1016/j.mce.2016.09.020] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Revised: 09/19/2016] [Accepted: 09/19/2016] [Indexed: 12/18/2022]
Abstract
Levonorgestrel (LNG), a synthetic progestin, is used in emergency contraception (EC). The mechanism is preventing or delaying ovulation at the level of the hypothalamic pituitary unit; however, little knowledge exists on LNG effects at the ovary. The aim of this study was to identify the effects of LNG on FSH-induced 17β-estradiol (E2) production, including LNG-mediated changes on global gene expression in rat granulosa cells (GC). Isolated GC from female Wistar rats were incubated in vitro in the presence or absence of human FSH and progestins. At the end of incubations, culture media and cells were collected for E2 and mRNA quantitation. The results showed the ability of LNG to inhibit both hFSH-induced E2 production and aromatase gene expression. Microarray analysis revealed that LNG treatment affects GC functionality particularly that related to folliculogenesis and steroid metabolism. These results may offer additional evidence for the mechanisms of action of LNG as EC.
Collapse
Affiliation(s)
- Saúl Lira-Albarrán
- Department of Reproductive Biology, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Avenida Vasco de Quiroga No. 15, Ciudad de México 14080, México.
| | - Marco F Larrea-Schiavon
- Department of Computational Genomics, Instituto Nacional de Medicina Genómica, Periférico Sur No. 4809, Ciudad de México 14610, México.
| | - Leticia González
- Department of Reproductive Biology, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Avenida Vasco de Quiroga No. 15, Ciudad de México 14080, México.
| | - Marta Durand
- Department of Reproductive Biology, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Avenida Vasco de Quiroga No. 15, Ciudad de México 14080, México.
| | - Claudia Rangel
- Department of Computational Genomics, Instituto Nacional de Medicina Genómica, Periférico Sur No. 4809, Ciudad de México 14610, México.
| | - Fernando Larrea
- Department of Reproductive Biology, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Avenida Vasco de Quiroga No. 15, Ciudad de México 14080, México.
| |
Collapse
|
13
|
Dose-exposure proportionality of a novel recombinant follicle-stimulating hormone (rFSH), FE 999049, derived from a human cell line, with comparison between Caucasian and Japanese women after subcutaneous administration. Clin Drug Investig 2016; 35:247-53. [PMID: 25773354 PMCID: PMC4368841 DOI: 10.1007/s40261-015-0276-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
Background and Objectives FE 999049 is a novel recombinant follicle-stimulating hormone (rFSH) preparation expressed by a human cell line (PER.C6®), in contrast to existing rFSH preparations expressed by Chinese hamster ovary (CHO) cell lines. Since the individual dose of rFSH may be altered depending on the response in women undergoing assisted reproductive technologies, knowledge on the dose-exposure linearity and proportionality is important. The purpose of these studies was to investigate the dose-exposure linearity and proportionality properties of FE 999049 with a comparison between Caucasian and Japanese women. This is the first study in Japanese women regarding pharmacokinetics of rFSH. Methods Forty-eight Caucasian and 31 Japanese healthy women of reproductive age were pituitary down-regulated to suppress endogenous FSH. Following single subcutaneous administration of 37.5, 75, 150, 225, or 450 IU (Steelman–Pohley assay), the serum FSH concentration was followed over 10 days. Results The dose-dependent pharmacokinetic parameters of FE 999049, area under the serum concentration-time curve (AUC) and maximum serum concentration (Cmax), showed dose-exposure linearity and proportionality over 150–450 IU in Caucasian women, the dose interval available for analysis, and 75–450 IU in Japanese women, which was the dose interval investigated. Comparison between Caucasian and Japanese women showed no differences between the populations. The dose-independent parameters were similar over all doses in both populations. FE 999049 was safe and well tolerated at all doses in both populations with few, mostly mild, adverse events. Conclusion The results demonstrate dose-exposure proportionality and a predictable dose-dependent exposure of FE 999049, with no differences in Caucasian and Japanese women of reproductive age.
Collapse
|
14
|
Wang H, Butnev V, Bousfield GR, Kumar TR. A human FSHB transgene encoding the double N-glycosylation mutant (Asn(7Δ) Asn(24Δ)) FSHβ subunit fails to rescue Fshb null mice. Mol Cell Endocrinol 2016; 426:113-24. [PMID: 26911932 PMCID: PMC5130991 DOI: 10.1016/j.mce.2016.02.015] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Revised: 02/13/2016] [Accepted: 02/16/2016] [Indexed: 10/22/2022]
Abstract
Follicle-stimulating hormone (FSH) is a gonadotrope-derived heterodimeric glycoprotein. Both the common α- and hormone-specific β subunits contain Asn-linked N-glycan chains. Recently, macroheterogeneous FSH glycoforms consisting of β-subunits that differ in N-glycan number were identified in pituitaries of several species and subsequently the recombinant human FSH glycoforms biochemically characterized. Although chemical modification and in vitro site-directed mutagenesis studies defined the roles of N-glycans on gonadotropin subunits, in vivo functional analyses in a whole-animal setting are lacking. Here, we have generated transgenic mice with gonadotrope-specific expression of either an HFSHB(WT) transgene that encodes human FSHβ WT subunit or an HFSHB(dgc) transgene that encodes a human FSHβ(Asn7Δ 24Δ) double N-glycosylation site mutant subunit, and separately introduced these transgenes onto Fshb null background using a genetic rescue strategy. We demonstrate that the human FSHβ(Asn7Δ 24Δ) double N-glycosylation site mutant subunit, unlike human FSHβ WT subunit, inefficiently combines with the mouse α-subunit in pituitaries of Fshb null mice. FSH dimer containing this mutant FSHβ subunit is inefficiently secreted with very low levels detectable in serum. Fshb null male mice expressing HFSHB(dgc) transgene are fertile and exhibit testis tubule size and sperm number similar to those of Fshb null mice. Fshb null female mice expressing the mutant, but not WT human FSHβ subunit-containing FSH dimer are infertile, demonstrate no evidence of estrus cycles, and many of the FSH-responsive genes remain suppressed in their ovaries. Thus, HFSHB(dgc) unlike HFSHB(WT) transgene does not rescue Fshb null mice. Our genetic approach provides direct in vivo evidence that N-linked glycans on FSHβ subunit are essential for its efficient assembly with the α-subunit to form FSH heterodimer in pituitary. Our studies also reveal that N-glycans on FSHβ subunit are essential for FSH secretion and FSH in vivo bioactivity to regulate gonadal growth and physiology.
Collapse
Affiliation(s)
- Huizhen Wang
- Department of Molecular and Integrative Physiology
| | - Vladimir Butnev
- Department of Biological Sciences, Wichita State University, Wichita, KS 67260, USA
| | - George R Bousfield
- Department of Biological Sciences, Wichita State University, Wichita, KS 67260, USA
| | - T Rajendra Kumar
- Department of Molecular and Integrative Physiology; Center for Reproductive Sciences, Institute for Reproductive Health and Regenerative Medicine; Department of Pathology and Laboratory Medicine; Department of Neurosurgery, University of Kansas Medical Center, Kansas City, KS 66160, USA.
| |
Collapse
|
15
|
Wang H, Chen X, Zhang X, Zhang W, Li Y, Yin H, Shao H, Chen G. Comparative Assessment of Glycosylation of a Recombinant Human FSH and a Highly Purified FSH Extracted from Human Urine. J Proteome Res 2016; 15:923-32. [DOI: 10.1021/acs.jproteome.5b00921] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hong Wang
- Shanghai Institute for Food and Drug Control, Shanghai 201203, China
| | - Xi Chen
- Waters Corporation, Shanghai 201206, China
| | - Xiaoxi Zhang
- Thermo Fisher Scientific, Shanghai 201206, China
| | - Wei Zhang
- Thermo Fisher Scientific, Shanghai 201206, China
| | - Yan Li
- Shanghai Techwell Biopharmaceutical Corporation, Shanghai 201108, China
| | - Hongrui Yin
- Shanghai Institute for Food and Drug Control, Shanghai 201203, China
| | - Hong Shao
- Shanghai Institute for Food and Drug Control, Shanghai 201203, China
| | - Gang Chen
- Shanghai Institute for Food and Drug Control, Shanghai 201203, China
| |
Collapse
|
16
|
Jiang C, Hou X, Wang C, May JV, Butnev VY, Bousfield GR, Davis JS. Hypoglycosylated hFSH Has Greater Bioactivity Than Fully Glycosylated Recombinant hFSH in Human Granulosa Cells. J Clin Endocrinol Metab 2015; 100:E852-60. [PMID: 25915568 PMCID: PMC4454802 DOI: 10.1210/jc.2015-1317] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
CONTEXT Previous studies suggest that aging in women is associated with a reduction in hypoglycosylated forms of FSH. OBJECTIVE Experiments were performed to determine whether glycosylation of the FSHβ subunit modulates the biological activity of FSH in human granulosa cells. DESIGN AND SETTING Recombinant human FSH (hFSH) derived from GH3 pituitary cells was purified into fractions containing hypoglycosylated hFSH(21/18) and fully glycosylated hFSH(24). The response to FSH glycoforms was evaluated using the well-characterized, FSH-responsive human granulosa cell line, KGN at an academic medical center. INTERVENTIONS Granulosa cells were treated with increasing concentrations of fully- or hypoglycosylated FSH glycoforms for periods up to 48 hours. MAIN OUTCOME MEASURE(S) The main outcomes were indices of cAMP-dependent cell signaling and estrogen and progesterone synthesis. RESULTS We observed that hypoglycosylated FSH(21/18) was significantly more effective than fully glycosylated FSH(24) at stimulating cAMP accumulation, protein kinase A (PKA) activity, and cAMP response element binding protein (CREB) (S133) phosphorylation. FSH(21/18) was also much more effective than hFSH(24) on the stimulation CREB-response element-mediated transcription, expression of aromatase and STAR proteins, and synthesis of estrogen and progesterone. Adenoviral-mediated expression of the endogenous inhibitor of PKA, inhibited FSH(21/18)- and FSH(24)-stimulated CREB phosphorylation, and steroidogenesis. CONCLUSIONS Hypoglycosylated FSH(21/18) has greater bioactivity than fully glycosylated hFSH(24), suggesting that age-dependent decreases in hypoglycosylated hFSH contribute to reduced ovarian responsiveness. Hypoglycosylated FSH may be useful in follicle stimulation protocols for older patients using assisted reproduction technologies.
Collapse
Affiliation(s)
- Chao Jiang
- The Olson Center for Women's Health, Department of Obstetrics and Gynecology (C.J., X.H., C.W., J.S.D.), University of Nebraska Medical Center, Omaha, Nebraska 68198; Nebraska-Northwest Iowa VA Medical Center (X.H., J.S.D.), Omaha, Nebraska 68105; Department of Biological Sciences (J.V.M., V.Y.B., G.R.B.), Wichita State University, Wichita, Kansas 67260; and Department of Biochemistry and Molecular Biology (J.S.D.), University of Nebraska Medical Center, Omaha, Nebraska 68198
| | - Xiaoying Hou
- The Olson Center for Women's Health, Department of Obstetrics and Gynecology (C.J., X.H., C.W., J.S.D.), University of Nebraska Medical Center, Omaha, Nebraska 68198; Nebraska-Northwest Iowa VA Medical Center (X.H., J.S.D.), Omaha, Nebraska 68105; Department of Biological Sciences (J.V.M., V.Y.B., G.R.B.), Wichita State University, Wichita, Kansas 67260; and Department of Biochemistry and Molecular Biology (J.S.D.), University of Nebraska Medical Center, Omaha, Nebraska 68198
| | - Cheng Wang
- The Olson Center for Women's Health, Department of Obstetrics and Gynecology (C.J., X.H., C.W., J.S.D.), University of Nebraska Medical Center, Omaha, Nebraska 68198; Nebraska-Northwest Iowa VA Medical Center (X.H., J.S.D.), Omaha, Nebraska 68105; Department of Biological Sciences (J.V.M., V.Y.B., G.R.B.), Wichita State University, Wichita, Kansas 67260; and Department of Biochemistry and Molecular Biology (J.S.D.), University of Nebraska Medical Center, Omaha, Nebraska 68198
| | - Jeffrey V May
- The Olson Center for Women's Health, Department of Obstetrics and Gynecology (C.J., X.H., C.W., J.S.D.), University of Nebraska Medical Center, Omaha, Nebraska 68198; Nebraska-Northwest Iowa VA Medical Center (X.H., J.S.D.), Omaha, Nebraska 68105; Department of Biological Sciences (J.V.M., V.Y.B., G.R.B.), Wichita State University, Wichita, Kansas 67260; and Department of Biochemistry and Molecular Biology (J.S.D.), University of Nebraska Medical Center, Omaha, Nebraska 68198
| | - Viktor Y Butnev
- The Olson Center for Women's Health, Department of Obstetrics and Gynecology (C.J., X.H., C.W., J.S.D.), University of Nebraska Medical Center, Omaha, Nebraska 68198; Nebraska-Northwest Iowa VA Medical Center (X.H., J.S.D.), Omaha, Nebraska 68105; Department of Biological Sciences (J.V.M., V.Y.B., G.R.B.), Wichita State University, Wichita, Kansas 67260; and Department of Biochemistry and Molecular Biology (J.S.D.), University of Nebraska Medical Center, Omaha, Nebraska 68198
| | - George R Bousfield
- The Olson Center for Women's Health, Department of Obstetrics and Gynecology (C.J., X.H., C.W., J.S.D.), University of Nebraska Medical Center, Omaha, Nebraska 68198; Nebraska-Northwest Iowa VA Medical Center (X.H., J.S.D.), Omaha, Nebraska 68105; Department of Biological Sciences (J.V.M., V.Y.B., G.R.B.), Wichita State University, Wichita, Kansas 67260; and Department of Biochemistry and Molecular Biology (J.S.D.), University of Nebraska Medical Center, Omaha, Nebraska 68198
| | - John S Davis
- The Olson Center for Women's Health, Department of Obstetrics and Gynecology (C.J., X.H., C.W., J.S.D.), University of Nebraska Medical Center, Omaha, Nebraska 68198; Nebraska-Northwest Iowa VA Medical Center (X.H., J.S.D.), Omaha, Nebraska 68105; Department of Biological Sciences (J.V.M., V.Y.B., G.R.B.), Wichita State University, Wichita, Kansas 67260; and Department of Biochemistry and Molecular Biology (J.S.D.), University of Nebraska Medical Center, Omaha, Nebraska 68198
| |
Collapse
|
17
|
Butnev VY, Butnev VY, May JV, Shuai B, Tran P, White WK, Brown A, Smalter Hall A, Harvey DJ, Bousfield GR. Production, purification, and characterization of recombinant hFSH glycoforms for functional studies. Mol Cell Endocrinol 2015; 405:42-51. [PMID: 25661536 PMCID: PMC4378652 DOI: 10.1016/j.mce.2015.01.026] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/16/2014] [Revised: 01/16/2015] [Accepted: 01/18/2015] [Indexed: 11/30/2022]
Abstract
Previously, our laboratory demonstrated the existence of a β-subunit glycosylation-deficient human FSH glycoform, hFSH(21). A third variant, hFSH(18), has recently been detected in FSH glycoforms isolated from purified pituitary hLH preparations. Human FSH(21) abundance in individual female pituitaries progressively decreased with increasing age. Hypo-glycosylated glycoform preparations are significantly more active than fully-glycosylated hFSH preparations. The purpose of this study was to produce, purify and chemically characterize both glycoform variants expressed by a mammalian cell line. Recombinant hFSH was expressed in a stable GH3 cell line and isolated from serum-free cell culture medium by sequential, hydrophobic and immunoaffinity chromatography. FSH glycoform fractions were separated by Superdex 75 gel-filtration. Western blot analysis revealed the presence of both hFSH(18) and hFSH(21) glycoforms in the low molecular weight fraction, however, their electrophoretic mobilities differed from those associated with the corresponding pituitary hFSH variants. Edman degradation of FSH(21/18)-derived β-subunit before and after peptide-N-glycanase F digestion confirmed that it possessed a mixture of both mono-glycosylated FSHβ subunits, as both Asn(7) and Asn(24) were partially glycosylated. FSH receptor-binding assays confirmed our previous observations that hFSH(21/18) exhibits greater receptor-binding affinity and occupies more FSH binding sites when compared to fully-glycosylated hFSH(24). Thus, the age-related reduction in hypo-glycosylated hFSH significantly reduces circulating levels of FSH biological activity that may further compromise reproductive function. Taken together, the ability to express and isolate recombinant hFSH glycoforms opens the way to study functional differences between them both in vivo and in vitro.
Collapse
Affiliation(s)
- Viktor Y Butnev
- Department of Biological Sciences, Wichita State University, Wichita, KS 67260-0026, USA
| | - Vladimir Y Butnev
- Department of Biological Sciences, Wichita State University, Wichita, KS 67260-0026, USA
| | - Jeffrey V May
- Department of Biological Sciences, Wichita State University, Wichita, KS 67260-0026, USA
| | - Bin Shuai
- Department of Biological Sciences, Wichita State University, Wichita, KS 67260-0026, USA
| | - Patrick Tran
- Department of Biological Sciences, Wichita State University, Wichita, KS 67260-0026, USA
| | - William K White
- Department of Biological Sciences, Wichita State University, Wichita, KS 67260-0026, USA
| | - Alan Brown
- Department of Biological Sciences, Wichita State University, Wichita, KS 67260-0026, USA
| | - Aaron Smalter Hall
- Molecular Graphics and Modeling Laboratory, University of Kansas, Lawrence, KS 66045, USA
| | - David J Harvey
- Department of Biochemistry, University of Oxford, South Parks Road, Oxford 0X1 3QU, UK
| | - George R Bousfield
- Department of Biological Sciences, Wichita State University, Wichita, KS 67260-0026, USA.
| |
Collapse
|
18
|
Bousfield GR, Butnev VY, White WK, Hall AS, Harvey DJ. Comparison of Follicle-Stimulating Hormone Glycosylation Microheterogenity by Quantitative Negative Mode Nano-Electrospray Mass Spectrometry of Peptide-N Glycanase-Released Oligosaccharides. ACTA ACUST UNITED AC 2015; 5. [PMID: 25960929 DOI: 10.4172/2153-0637.1000129] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Glycans from six highly purified hFSH preparations were released by peptide-N-glycanase digestion and analyzed by negative mode nano-ESI mass spectrometry before and after neuraminidase digestion. Pituitary glycan structures were mainly high-mannose, di-, tri-, and tetra-antennary, and their abundance largely paralleled that reported by other investigators using different approaches. For most of the FSH preparations, the differences in glycosylation appeared to be restricted to relative abundances of the major glycan families, as defined by their neutral core oligosaccharide structures. Qualitative differences between glycan populations were largely relegated to those species that were lowest in abundance. Significant qualitative differences were noted in two cases. Recombinant GH3-hFSH triantennary glycans appeared to have the third antenna exclusively on the mannose6-branch, in contrast to all pituitary and urinary hFSH triantennary glycans, in which this antenna was exclusively attached to the mannose3-branch. The hypo-glycosylated hFSH preparation isolated from purified hLH was decorated with high mannose glycans that accounted for over 40% of the total in this population. As this preparation was found to be consistently 20-fold more active than hFSH24 in FSH receptor-binding assays, it appears that both macroheterogeneity and microheterogeneity in FSH preparations need to be taken into account.
Collapse
Affiliation(s)
- George R Bousfield
- Department of Biological Sciences, Wichita State University, Wichita, KS 67260
| | - Vladimir Y Butnev
- Department of Biological Sciences, Wichita State University, Wichita, KS 67260
| | - William K White
- Department of Biological Sciences, Wichita State University, Wichita, KS 67260
| | - Aaron Smalter Hall
- Molecular Graphics and Modeling Laboratory, University of Kansas, Lawrence, KS 66045
| | - David J Harvey
- Department of Biochemistry, University of Oxford, Oxford, OX1 3QU, UK
| |
Collapse
|
19
|
Olsson H, Sandström R, Grundemar L. Different pharmacokinetic and pharmacodynamic properties of recombinant follicle-stimulating hormone (rFSH) derived from a human cell line compared with rFSH from a non-human cell line. J Clin Pharmacol 2014; 54:1299-307. [DOI: 10.1002/jcph.328] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2014] [Revised: 04/30/2014] [Accepted: 04/30/2014] [Indexed: 11/09/2022]
Affiliation(s)
- Håkan Olsson
- Department of Experimental Medicine; Ferring Pharmaceuticals A/S; Copenhagen Denmark
| | - Rikard Sandström
- Department of Experimental Medicine; Ferring Pharmaceuticals A/S; Copenhagen Denmark
| | - Lars Grundemar
- Department of Experimental Medicine; Ferring Pharmaceuticals A/S; Copenhagen Denmark
| |
Collapse
|
20
|
Davis JS, Kumar TR, May JV, Bousfield GR. Naturally Occurring Follicle-Stimulating Hormone Glycosylation Variants. ACTA ACUST UNITED AC 2014; 4:e117. [PMID: 25893134 PMCID: PMC4398967 DOI: 10.4172/2153-0637.1000e117] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- John S Davis
- VA Nebraska-Western Iowa Health Care System and Olson Center for Women's Health, University of Nebraska Medical Center, Omaha, Nebraska, USA
| | - T Rajendra Kumar
- Department of Molecular and Integrative Physiology, University of Kansas Medical Center, Kansas City, Kansas, USA
| | - Jeffrey V May
- Department of Biological Sciences, Wichita State University, Wichita, Kansas, USA
| | - George R Bousfield
- Department of Biological Sciences, Wichita State University, Wichita, Kansas, USA
| |
Collapse
|