LH and hCG Action on the Same Receptor Results in Quantitatively and Qualitatively Different Intracellular Signalling

Human luteinizing hormone (hLH) and chorionic gonadotropin (hCG) act on the same receptor (LHCGR) but it is not known whether they elicit the same cellular and molecular response. This study compares for the first time the activation of cell-signalling pathways and gene expression in response to hLH...

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Veröffentlicht in:PloS one Jg. 7; H. 10; S. e46682
Hauptverfasser: Casarini, Livio, Lispi, Monica, Longobardi, Salvatore, Milosa, Fabiola, La Marca, Antonio, Tagliasacchi, Daniela, Pignatti, Elisa, Simoni, Manuela
Format: Journal Article
Sprache:Englisch
Veröffentlicht: United States Public Library of Science 05.10.2012
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ISSN:1932-6203, 1932-6203
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Abstract Human luteinizing hormone (hLH) and chorionic gonadotropin (hCG) act on the same receptor (LHCGR) but it is not known whether they elicit the same cellular and molecular response. This study compares for the first time the activation of cell-signalling pathways and gene expression in response to hLH and hCG. Using recombinant hLH and recombinant hCG we evaluated the kinetics of cAMP production in COS-7 and hGL5 cells permanently expressing LHCGR (COS-7/LHCGR, hGL5/LHCGR), as well as cAMP, ERK1/2, AKT activation and progesterone production in primary human granulosa cells (hGLC). The expression of selected target genes was measured in the presence or absence of ERK- or AKT-pathways inhibitors. In COS-7/LHCGR cells, hCG is 5-fold more potent than hLH (cAMP ED(50): 107.1±14.3 pM and 530.0±51.2 pM, respectively). hLH maximal effect was significantly faster (10 minutes by hLH; 1 hour by hCG). In hGLC continuous exposure to equipotent doses of gonadotropins up to 36 hours revealed that intracellular cAMP production is oscillating and significantly higher by hCG versus hLH. Conversely, phospho-ERK1/2 and -AKT activation was more potent and sustained by hLH versus hCG. ERK1/2 and AKT inhibition removed the inhibitory effect on NRG1 (neuregulin) expression by hLH but not by hCG; ERK1/2 inhibition significantly increased hLH- but not hCG-stimulated CYP19A1 (aromatase) expression. We conclude that: i) hCG is more potent on cAMP production, while hLH is more potent on ERK and AKT activation; ii) hGLC respond to equipotent, constant hLH or hCG stimulation with a fluctuating cAMP production and progressive progesterone secretion; and iii) the expression of hLH and hCG target genes partly involves the activation of different pathways depending on the ligand. Therefore, the LHCGR is able to differentiate the activity of hLH and hCG.
AbstractList Human luteinizing hormone (hLH) and chorionic gonadotropin (hCG) act on the same receptor (LHCGR) but it is not known whether they elicit the same cellular and molecular response. This study compares for the first time the activation of cell-signalling pathways and gene expression in response to hLH and hCG. Using recombinant hLH and recombinant hCG we evaluated the kinetics of cAMP production in COS-7 and hGL5 cells permanently expressing LHCGR (COS-7/LHCGR, hGL5/LHCGR), as well as cAMP, ERK1/2, AKT activation and progesterone production in primary human granulosa cells (hGLC). The expression of selected target genes was measured in the presence or absence of ERK- or AKT-pathways inhibitors. In COS-7/LHCGR cells, hCG is 5-fold more potent than hLH (cAMP ED50: 107.1±14.3 pM and 530.0±51.2 pM, respectively). hLH maximal effect was significantly faster (10 minutes by hLH; 1 hour by hCG). In hGLC continuous exposure to equipotent doses of gonadotropins up to 36 hours revealed that intracellular cAMP production is oscillating and significantly higher by hCG versus hLH. Conversely, phospho-ERK1/2 and -AKT activation was more potent and sustained by hLH versus hCG. ERK1/2 and AKT inhibition removed the inhibitory effect on NRG1 (neuregulin) expression by hLH but not by hCG; ERK1/2 inhibition significantly increased hLH- but not hCG-stimulated CYP19A1 (aromatase) expression. We conclude that: i) hCG is more potent on cAMP production, while hLH is more potent on ERK and AKT activation; ii) hGLC respond to equipotent, constant hLH or hCG stimulation with a fluctuating cAMP production and progressive progesterone secretion; and iii) the expression of hLH and hCG target genes partly involves the activation of different pathways depending on the ligand. Therefore, the LHCGR is able to differentiate the activity of hLH and hCG.
Human luteinizing hormone (hLH) and chorionic gonadotropin (hCG) act on the same receptor (LHCGR) but it is not known whether they elicit the same cellular and molecular response. This study compares for the first time the activation of cell-signalling pathways and gene expression in response to hLH and hCG. Using recombinant hLH and recombinant hCG we evaluated the kinetics of cAMP production in COS-7 and hGL5 cells permanently expressing LHCGR (COS-7/LHCGR, hGL5/LHCGR), as well as cAMP, ERK1/2, AKT activation and progesterone production in primary human granulosa cells (hGLC). The expression of selected target genes was measured in the presence or absence of ERK- or AKT-pathways inhibitors. In COS-7/LHCGR cells, hCG is 5-fold more potent than hLH (cAMP ED.sub.50 : 107.1±14.3 pM and 530.0±51.2 pM, respectively). hLH maximal effect was significantly faster (10 minutes by hLH; 1 hour by hCG). In hGLC continuous exposure to equipotent doses of gonadotropins up to 36 hours revealed that intracellular cAMP production is oscillating and significantly higher by hCG versus hLH. Conversely, phospho-ERK1/2 and -AKT activation was more potent and sustained by hLH versus hCG. ERK1/2 and AKT inhibition removed the inhibitory effect on NRG1 (neuregulin) expression by hLH but not by hCG; ERK1/2 inhibition significantly increased hLH- but not hCG-stimulated CYP19A1 (aromatase) expression. We conclude that: i) hCG is more potent on cAMP production, while hLH is more potent on ERK and AKT activation; ii) hGLC respond to equipotent, constant hLH or hCG stimulation with a fluctuating cAMP production and progressive progesterone secretion; and iii) the expression of hLH and hCG target genes partly involves the activation of different pathways depending on the ligand. Therefore, the LHCGR is able to differentiate the activity of hLH and hCG.
Human luteinizing hormone (hLH) and chorionic gonadotropin (hCG) act on the same receptor (LHCGR) but it is not known whether they elicit the same cellular and molecular response. This study compares for the first time the activation of cell-signalling pathways and gene expression in response to hLH and hCG. Using recombinant hLH and recombinant hCG we evaluated the kinetics of cAMP production in COS-7 and hGL5 cells permanently expressing LHCGR (COS-7/LHCGR, hGL5/LHCGR), as well as cAMP, ERK1/2, AKT activation and progesterone production in primary human granulosa cells (hGLC). The expression of selected target genes was measured in the presence or absence of ERK- or AKT-pathways inhibitors. In COS-7/LHCGR cells, hCG is 5-fold more potent than hLH (cAMP ED(50): 107.1±14.3 pM and 530.0±51.2 pM, respectively). hLH maximal effect was significantly faster (10 minutes by hLH; 1 hour by hCG). In hGLC continuous exposure to equipotent doses of gonadotropins up to 36 hours revealed that intracellular cAMP production is oscillating and significantly higher by hCG versus hLH. Conversely, phospho-ERK1/2 and -AKT activation was more potent and sustained by hLH versus hCG. ERK1/2 and AKT inhibition removed the inhibitory effect on NRG1 (neuregulin) expression by hLH but not by hCG; ERK1/2 inhibition significantly increased hLH- but not hCG-stimulated CYP19A1 (aromatase) expression. We conclude that: i) hCG is more potent on cAMP production, while hLH is more potent on ERK and AKT activation; ii) hGLC respond to equipotent, constant hLH or hCG stimulation with a fluctuating cAMP production and progressive progesterone secretion; and iii) the expression of hLH and hCG target genes partly involves the activation of different pathways depending on the ligand. Therefore, the LHCGR is able to differentiate the activity of hLH and hCG.Human luteinizing hormone (hLH) and chorionic gonadotropin (hCG) act on the same receptor (LHCGR) but it is not known whether they elicit the same cellular and molecular response. This study compares for the first time the activation of cell-signalling pathways and gene expression in response to hLH and hCG. Using recombinant hLH and recombinant hCG we evaluated the kinetics of cAMP production in COS-7 and hGL5 cells permanently expressing LHCGR (COS-7/LHCGR, hGL5/LHCGR), as well as cAMP, ERK1/2, AKT activation and progesterone production in primary human granulosa cells (hGLC). The expression of selected target genes was measured in the presence or absence of ERK- or AKT-pathways inhibitors. In COS-7/LHCGR cells, hCG is 5-fold more potent than hLH (cAMP ED(50): 107.1±14.3 pM and 530.0±51.2 pM, respectively). hLH maximal effect was significantly faster (10 minutes by hLH; 1 hour by hCG). In hGLC continuous exposure to equipotent doses of gonadotropins up to 36 hours revealed that intracellular cAMP production is oscillating and significantly higher by hCG versus hLH. Conversely, phospho-ERK1/2 and -AKT activation was more potent and sustained by hLH versus hCG. ERK1/2 and AKT inhibition removed the inhibitory effect on NRG1 (neuregulin) expression by hLH but not by hCG; ERK1/2 inhibition significantly increased hLH- but not hCG-stimulated CYP19A1 (aromatase) expression. We conclude that: i) hCG is more potent on cAMP production, while hLH is more potent on ERK and AKT activation; ii) hGLC respond to equipotent, constant hLH or hCG stimulation with a fluctuating cAMP production and progressive progesterone secretion; and iii) the expression of hLH and hCG target genes partly involves the activation of different pathways depending on the ligand. Therefore, the LHCGR is able to differentiate the activity of hLH and hCG.
Human luteinizing hormone (hLH) and chorionic gonadotropin (hCG) act on the same receptor (LHCGR) but it is not known whether they elicit the same cellular and molecular response. This study compares for the first time the activation of cell-signalling pathways and gene expression in response to hLH and hCG. Using recombinant hLH and recombinant hCG we evaluated the kinetics of cAMP production in COS-7 and hGL5 cells permanently expressing LHCGR (COS-7/LHCGR, hGL5/LHCGR), as well as cAMP, ERK1/2, AKT activation and progesterone production in primary human granulosa cells (hGLC). The expression of selected target genes was measured in the presence or absence of ERK- or AKT-pathways inhibitors. In COS-7/LHCGR cells, hCG is 5-fold more potent than hLH (cAMP ED(50): 107.1±14.3 pM and 530.0±51.2 pM, respectively). hLH maximal effect was significantly faster (10 minutes by hLH; 1 hour by hCG). In hGLC continuous exposure to equipotent doses of gonadotropins up to 36 hours revealed that intracellular cAMP production is oscillating and significantly higher by hCG versus hLH. Conversely, phospho-ERK1/2 and -AKT activation was more potent and sustained by hLH versus hCG. ERK1/2 and AKT inhibition removed the inhibitory effect on NRG1 (neuregulin) expression by hLH but not by hCG; ERK1/2 inhibition significantly increased hLH- but not hCG-stimulated CYP19A1 (aromatase) expression. We conclude that: i) hCG is more potent on cAMP production, while hLH is more potent on ERK and AKT activation; ii) hGLC respond to equipotent, constant hLH or hCG stimulation with a fluctuating cAMP production and progressive progesterone secretion; and iii) the expression of hLH and hCG target genes partly involves the activation of different pathways depending on the ligand. Therefore, the LHCGR is able to differentiate the activity of hLH and hCG.
Audience Academic
Author La Marca, Antonio
Casarini, Livio
Tagliasacchi, Daniela
Longobardi, Salvatore
Pignatti, Elisa
Simoni, Manuela
Lispi, Monica
Milosa, Fabiola
AuthorAffiliation 2 Center for Genomic Research, University of Modena and Reggio Emilia, Modena, Italy
5 Azienda USL di Modena, Modena, Italy
3 Medical Liaison Office, Merck Serono S.p.A., Rome, Italy
University of Muenster, Germany
1 Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy
4 Mother-Infant Department, Institute of Obstetrics and Gynecology, University Hospital of Modena, Modena, Italy
AuthorAffiliation_xml – name: 2 Center for Genomic Research, University of Modena and Reggio Emilia, Modena, Italy
– name: 4 Mother-Infant Department, Institute of Obstetrics and Gynecology, University Hospital of Modena, Modena, Italy
– name: University of Muenster, Germany
– name: 1 Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy
– name: 3 Medical Liaison Office, Merck Serono S.p.A., Rome, Italy
– name: 5 Azienda USL di Modena, Modena, Italy
Author_xml – sequence: 1
  givenname: Livio
  surname: Casarini
  fullname: Casarini, Livio
– sequence: 2
  givenname: Monica
  surname: Lispi
  fullname: Lispi, Monica
– sequence: 3
  givenname: Salvatore
  surname: Longobardi
  fullname: Longobardi, Salvatore
– sequence: 4
  givenname: Fabiola
  surname: Milosa
  fullname: Milosa, Fabiola
– sequence: 5
  givenname: Antonio
  surname: La Marca
  fullname: La Marca, Antonio
– sequence: 6
  givenname: Daniela
  surname: Tagliasacchi
  fullname: Tagliasacchi, Daniela
– sequence: 7
  givenname: Elisa
  surname: Pignatti
  fullname: Pignatti, Elisa
– sequence: 8
  givenname: Manuela
  surname: Simoni
  fullname: Simoni, Manuela
BackLink https://www.ncbi.nlm.nih.gov/pubmed/23071612$$D View this record in MEDLINE/PubMed
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ContentType Journal Article
Copyright COPYRIGHT 2012 Public Library of Science
Casarini et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License: https://creativecommons.org/licenses/by/4.0/ (the “License”), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.
2012 Casarini et al 2012 Casarini et al
Copyright_xml – notice: COPYRIGHT 2012 Public Library of Science
– notice: Casarini et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License: https://creativecommons.org/licenses/by/4.0/ (the “License”), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.
– notice: 2012 Casarini et al 2012 Casarini et al
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Conceived and designed the experiments: LC ML SL EP MS. Performed the experiments: LC FM DT ALM. Analyzed the data: LC ML SL EP MS. Contributed reagents/materials/analysis tools: ML SL. Wrote the paper: LC ML SL MS.
Competing Interests: The authors have declared that no competing interests exist.
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– reference: 7593498 - Hum Reprod. 1995 Jun;10(6):1367-72
– reference: 20660299 - Mol Endocrinol. 2010 Sep;24(9):1782-93
– reference: 15525573 - J Endocrinol. 2004 Oct;183(1):51-60
– reference: 17099214 - Hum Reprod. 2007 Feb;22(2):401-6
– reference: 8735600 - Mol Cell Endocrinol. 1996 Apr 19;118(1-2):145-53
– reference: 217881 - J Cell Biol. 1979 Jan;80(1):21-36
– reference: 17485326 - Front Biosci. 2007;12:3628-39
– reference: 15291759 - J Mol Endocrinol. 2004 Aug;33(1):281-91
– reference: 19794155 - Biol Reprod. 2010 Feb;82(2):246-56
– reference: 12740151 - Curr Med Res Opin. 2003;19(2):83-8
– reference: 10852464 - J Clin Endocrinol Metab. 2000 Jun;85(6):2281-6
– reference: 12470572 - Reprod Biomed Online. 2002 Mar-Apr;4(2):106-15
– reference: 8277226 - J Endocrinol. 1993 Sep;138(3):529-43
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– reference: 10696567 - Endocr Rev. 2000 Feb;21(1):5-22
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– reference: 9239699 - Mol Hum Reprod. 1996 Oct;2(10):799-806
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– reference: 20719813 - Hum Reprod. 2010 Oct;25(10):2569-78
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– reference: 21526415 - Rev Endocr Metab Disord. 2011 Dec;12(4):259-74
– reference: 21047912 - Mol Endocrinol. 2011 Jan;25(1):104-16
– reference: 6265633 - J Reprod Fertil. 1981 Jul;62(2):527-36
– reference: 19147490 - J Biol Chem. 2009 Mar 20;284(12):7483-94
– reference: 7537693 - Exp Cell Res. 1995 May;218(1):271-82
– reference: 17928545 - Physiology (Bethesda). 2007 Oct;22:320-7
– reference: 8070364 - Endocrinology. 1994 Sep;135(3):1205-11
– reference: 21158738 - Biochem J. 2011 Jan 1;433(1):11-8
– reference: 12843195 - J Clin Endocrinol Metab. 2003 Jul;88(7):3409-14
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– reference: 8126145 - J Clin Endocrinol Metab. 1994 Mar;78(3):705-10
– reference: 18835871 - Hum Reprod. 2009 Jan;24(1):176-84
– reference: 12642402 - Br J Pharmacol. 2003 Mar;138(5):995-1003
– reference: 1693567 - Endocrinology. 1990 Jun;126(6):3107-15
– reference: 21385327 - Acta Physiol (Oxf). 2012 Feb;204(2):277-87
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Snippet Human luteinizing hormone (hLH) and chorionic gonadotropin (hCG) act on the same receptor (LHCGR) but it is not known whether they elicit the same cellular and...
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StartPage e46682
SubjectTerms 1-Methyl-3-isobutylxanthine - pharmacology
Activation
Adult
AKT protein
Animals
Apoptosis
Aromatase
Biology
Cell activation
Cell cycle
Cell Shape
Cercopithecus aethiops
Chorionic gonadotropin
Chorionic Gonadotropin - pharmacology
Chorionic Gonadotropin - physiology
Chorionic gonadotropins
COS Cells
Cyclic adenosine monophosphate
Cyclic AMP
Cyclic AMP - metabolism
Dehydrogenases
Dose-Response Relationship, Drug
Epidermal growth factor
Extracellular signal-regulated kinase
Extracellular Signal-Regulated MAP Kinases - antagonists & inhibitors
Extracellular Signal-Regulated MAP Kinases - metabolism
Female
Gene expression
Genes
Glycoproteins
Gonadotropins
Granulosa cells
Granulosa Cells - metabolism
Gynecology
Hormones
Humans
Inhibition
Intracellular
Intracellular signalling
Kinases
Kinetics
Luteinizing hormone
Luteinizing Hormone - pharmacology
Luteinizing Hormone - physiology
Medicine
Metabolism
Middle Aged
Neuregulin
Neuregulin 1
Obstetrics
Pathways
Physiology
Pituitary (anterior)
Primary Cell Culture
Progesterone
Progesterone - biosynthesis
Protein Kinase Inhibitors - pharmacology
Proteins
Proto-Oncogene Proteins c-akt - antagonists & inhibitors
Proto-Oncogene Proteins c-akt - metabolism
Receptors, LH - agonists
Receptors, LH - metabolism
Receptors, LH - physiology
Rodents
Secretion
Signal Transduction
Studies
Transcription activation
Transcriptome
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Title LH and hCG Action on the Same Receptor Results in Quantitatively and Qualitatively Different Intracellular Signalling
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http://dx.doi.org/10.1371/journal.pone.0046682
Volume 7
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