Zebra chorionic gonadotropin: partial purification and characterization

Six samples of pregnant zebra (z) serum from the first and second trimesters of pregnancy were analyzed by RIA and shown to have chorionic gonadotropin levels comparable to that of the mare (0.9-5.3 micrograms/ml); first trimester levels in most cases were higher than second trimester levels. A pool...

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Published inBiology of reproduction Vol. 44; no. 5; pp. 827 - 833
Main Authors MCFARLANE, J. R, CZEKALA, N. M, PAPKOFF, H
Format Journal Article
LanguageEnglish
Published Madison, WI Society for the Study of Reproduction 01.05.1991
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Abstract Six samples of pregnant zebra (z) serum from the first and second trimesters of pregnancy were analyzed by RIA and shown to have chorionic gonadotropin levels comparable to that of the mare (0.9-5.3 micrograms/ml); first trimester levels in most cases were higher than second trimester levels. A pool of the sera (10 ml) was fractionated by methods previously employed for the purification of equine (e) and donkey (d) chorionic gonadotropin to achieve a concentration of the zebra chorionic gonadotropin (zCG). A yield of 1.0 mg of glycoprotein was obtained. HPLC analysis of the material indicated the content of zCG to be about 7%. Its molecular size as judged by Ve/Vo values is smaller than eCG, greater than ovine LH, and about the same as equine LH. The zCG was tested in RIAs for LH and eCG, radioreceptor assays (RRA) for LH and FSH, and the rat testis Leydig cell assay for LH. Comparisons were made with equine and donkey chorionic gonadotropin, and equine and zebra LH. The results, preliminary because the preparation is not of high purity, showed that zCG is bioactive as an LH; immunologically similar to eCG, eLH, dCG, and zLH; and competes in RRAs for LH but not FSH receptors. It differs, therefore, from eCG and eLH--which have high levels of intrinsic FSH activity, and is more like dCG, dLH, and zLH--all of which have minimal if any FSH activity.
AbstractList Six samples of pregnant zebra (z) serum from the first and second trimesters of pregnancy were analyzed by RIA and shown to have chorionic gonadotropin levels comparable to that of the mare (0.9-5.3 micrograms/ml); first trimester levels in most cases were higher than second trimester levels. A pool of the sera (10 ml) was fractionated by methods previously employed for the purification of equine (e) and donkey (d) chorionic gonadotropin to achieve a concentration of the zebra chorionic gonadotropin (zCG). A yield of 1.0 mg of glycoprotein was obtained. HPLC analysis of the material indicated the content of zCG to be about 7%. Its molecular size as judged by Ve/Vo values is smaller than eCG, greater than ovine LH, and about the same as equine LH. The zCG was tested in RIAs for LH and eCG, radioreceptor assays (RRA) for LH and FSH, and the rat testis Leydig cell assay for LH. Comparisons were made with equine and donkey chorionic gonadotropin, and equine and zebra LH. The results, preliminary because the preparation is not of high purity, showed that zCG is bioactive as an LH; immunologically similar to eCG, eLH, dCG, and zLH; and competes in RRAs for LH but not FSH receptors. It differs, therefore, from eCG and eLH--which have high levels of intrinsic FSH activity, and is more like dCG, dLH, and zLH--all of which have minimal if any FSH activity.
Six samples of pregnant zebra (z) serum from the first and second trimesters of pregnancy were analyzed and shown to have chorionic gonadotropin levels comparable to that of mare, first trimester levels in most cases were higher than second trimester levels.
Six samples of pregnant zebra (z) serum from the first and second trimesters of pregnancy were analyzed by RIA and shown to have chorionic gonadotropin levels comparable to that of the mare (0.9-5.3 micrograms/ml); first trimester levels in most cases were higher than second trimester levels. A pool of the sera (10 ml) was fractionated by methods previously employed for the purification of equine (e) and donkey (d) chorionic gonadotropin to achieve a concentration of the zebra chorionic gonadotropin (zCG). A yield of 1.0 mg of glycoprotein was obtained. HPLC analysis of the material indicated the content of zCG to be about 7%. Its molecular size as judged by Ve/Vo values is smaller than eCG, greater than ovine LH, and about the same as equine LH. The zCG was tested in RIAs for LH and eCG, radioreceptor assays (RRA) for LH and FSH, and the rat testis Leydig cell assay for LH. Comparisons were made with equine and donkey chorionic gonadotropin, and equine and zebra LH. The results, preliminary because the preparation is not of high purity, showed that zCG is bioactive as an LH; immunologically similar to eCG, eLH, dCG, and zLH; and competes in RRAs for LH but not FSH receptors. It differs, therefore, from eCG and eLH--which have high levels of intrinsic FSH activity, and is more like dCG, dLH, and zLH--all of which have minimal if any FSH activity.
Author J R McFarlane
H Papkoff
N M Czekala
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Issue 5
Keywords Characterization
Vertebrata
Mammalia
Chorionic gonadotropin
Purification
Radioimmunoassay
HPLC chromatography
Artiodactyla
Glycoprotein hormone
Ungulata
Biological activity
Placental hormone
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PublicationTitle Biology of reproduction
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Snippet Six samples of pregnant zebra (z) serum from the first and second trimesters of pregnancy were analyzed by RIA and shown to have chorionic gonadotropin levels...
Six samples of pregnant zebra (z) serum from the first and second trimesters of pregnancy were analyzed by RIA and shown to have chorionic gonadotropin levels...
Six samples of pregnant zebra (z) serum from the first and second trimesters of pregnancy were analyzed and shown to have chorionic gonadotropin levels...
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SubjectTerms Analytical, structural and metabolic biochemistry
Animals
Biological and medical sciences
Biological Assay
chorionic gonadotropin
Chorionic Gonadotropin - blood
Chorionic Gonadotropin - isolation & purification
Chromatography, High Pressure Liquid
Female
Follicle Stimulating Hormone - blood
Fundamental and applied biological sciences. Psychology
Luteinizing Hormone - blood
Perissodactyla - blood
Pregnancy
Pregnancy, Animal - blood
Protein hormones. Growth factors. Cytokines
Proteins
Radioimmunoassay
Radioligand Assay
Species Specificity
Title Zebra chorionic gonadotropin: partial purification and characterization
URI http://www.biolreprod.org/content/44/5/827.abstract
https://www.ncbi.nlm.nih.gov/pubmed/1907860
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Volume 44
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