In vitro inhibition of the bioactivity of follicle-stimulating hormone by antisera against a peptide representing part of the FSH-receptor

Autor: Wouter Cornelis Puijk, W.E Zijlstra-Westhoff, J. W. Slootstra, H.B. Oonk, R.H. Meloen, W.M.M. Schaaper
Jazyk: angličtina
Rok vydání: 1998
Předmět:
Male
endocrine system
G protein
medicine.drug_class
Molecular Sequence Data
Immunology
Receptors
Cell Surface
CHO Cells
Biology
Antibodies
C5a receptor
Cell Line
Follicle-stimulating hormone
GTP-Binding Proteins
Cricetinae
FSH
medicine
Animals
Humans
Immunology and Allergy
Amino Acid Sequence
Protamines
Binding site
Receptor
Instituut voor Dierhouderij en Diergezondheid
FSH-receptor-binding domain
Inhibition of bioactivity
Peptide immunisation
Sequence Homology
Amino Acid
ID-Lelystad
Obstetrics and Gynecology
Peptide Fragments
ID Lelystad
Reproductive Medicine
Biochemistry
ID-Lelystad
Instituut voor Dierhouderij en Diergezondheid
ID Lelystad
Institute for Animal Science and Health
Receptors
FSH
Rabbits
Follicle Stimulating Hormone
Gonadotropin
Signal transduction
Follicle-stimulating hormone receptor
Synthetic peptide vaccine
FSH-receptor
Institute for Animal Science and Health
Zdroj: Journal of Reproductive Immunology 38 (1998) 2
Journal of Reproductive Immunology, 38(2), 139-154
ISSN: 0165-0378
Popis: The aim of the present work was to define an FSH receptor (FSHR) peptide that can induce antibodies that will inhibit the bioactivity of FSH. Therefore, the hFSHR sequence was aligned with that of all other known G-protein coupled receptors. An area with increased sequence homology was identified between the FSH-, LH-, TSH receptors, the C5a receptor and the IL8 receptor. The similarity consists of a richness in acidic (D and E) and hydrophobic (Y and F) residues. In hFSHR the sequence is EDNESSYSRGFDMTYTEFDYDLCNEVVD (amino acid 299-326). Research on both the C5a- and IL8-receptor has indicated that this part is responsible for hormone binding but not for signal transduction. Protamine. an antagonist for both the C5a- and IL8 receptor also inhibited the bioactivities of FSH and LH when tested in a bioassay. This suggests that in the hFSHR this region might also be involved in hormone binding. Specificity of this region towards the diverse ligands all binding to the C5a or to the IL8 receptor might be attributed to differences in the profile of alternating basic and hydrophobic residues. Therefore, the hypothesis was tested as to whether antisera raised against peptides of this FSHR-domain would inhibit FSH-bioactivity but not LH-bioactivity. Indeed antisera were found (anti-hFSHR 309-322) that inhibited the biological activity of FSH in a bioassay. These antisera proved to be specific since they did not inhibit the bioactivity of LH. These data suggest that the core sequence (hFSHR 309-322) of the aligned domain of the hFSHR, in analogy to the IL8- and C5a receptors, is involved in hormone binding and ligand specificity. This domain therefore forms a valuable tool in FSH- and FSHR research for scientific and medical purposes.
Databáze: OpenAIRE
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