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Niels Henrik Ingvar Hjøllund

Inhibin B as a serum marker of spermatogenesis: correlation to differences in sperm concentration and follicle-stimulating hormone levels. A study of 349 Danish men

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

Standard

Inhibin B as a serum marker of spermatogenesis: correlation to differences in sperm concentration and follicle-stimulating hormone levels. A study of 349 Danish men. / Jensen, T K; Andersson, A M; Hjøllund, Niels Henrik Ingvar; Scheike, Thomas; Kolstad, Henrik; Giwercman, A; Henriksen, T B; Ernst, E; Bonde, J P; Olsen, J; McNeilly, A; Groome, N P; Skakkebaek, N E.

I: Journal of Clinical Endocrinology and Metabolism, Bind 82, Nr. 12, 01.12.1997, s. 4059-63.

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

Harvard

Jensen, TK, Andersson, AM, Hjøllund, NHI, Scheike, T, Kolstad, H, Giwercman, A, Henriksen, TB, Ernst, E, Bonde, JP, Olsen, J, McNeilly, A, Groome, NP & Skakkebaek, NE 1997, 'Inhibin B as a serum marker of spermatogenesis: correlation to differences in sperm concentration and follicle-stimulating hormone levels. A study of 349 Danish men', Journal of Clinical Endocrinology and Metabolism, bind 82, nr. 12, s. 4059-63.

APA

Jensen, T. K., Andersson, A. M., Hjøllund, N. H. I., Scheike, T., Kolstad, H., Giwercman, A., Henriksen, T. B., Ernst, E., Bonde, J. P., Olsen, J., McNeilly, A., Groome, N. P., & Skakkebaek, N. E. (1997). Inhibin B as a serum marker of spermatogenesis: correlation to differences in sperm concentration and follicle-stimulating hormone levels. A study of 349 Danish men. Journal of Clinical Endocrinology and Metabolism, 82(12), 4059-63.

CBE

Jensen TK, Andersson AM, Hjøllund NHI, Scheike T, Kolstad H, Giwercman A, Henriksen TB, Ernst E, Bonde JP, Olsen J, McNeilly A, Groome NP, Skakkebaek NE. 1997. Inhibin B as a serum marker of spermatogenesis: correlation to differences in sperm concentration and follicle-stimulating hormone levels. A study of 349 Danish men. Journal of Clinical Endocrinology and Metabolism. 82(12):4059-63.

MLA

Vancouver

Jensen TK, Andersson AM, Hjøllund NHI, Scheike T, Kolstad H, Giwercman A o.a. Inhibin B as a serum marker of spermatogenesis: correlation to differences in sperm concentration and follicle-stimulating hormone levels. A study of 349 Danish men. Journal of Clinical Endocrinology and Metabolism. 1997 dec 1;82(12):4059-63.

Author

Jensen, T K ; Andersson, A M ; Hjøllund, Niels Henrik Ingvar ; Scheike, Thomas ; Kolstad, Henrik ; Giwercman, A ; Henriksen, T B ; Ernst, E ; Bonde, J P ; Olsen, J ; McNeilly, A ; Groome, N P ; Skakkebaek, N E. / Inhibin B as a serum marker of spermatogenesis: correlation to differences in sperm concentration and follicle-stimulating hormone levels. A study of 349 Danish men. I: Journal of Clinical Endocrinology and Metabolism. 1997 ; Bind 82, Nr. 12. s. 4059-63.

Bibtex

@article{f85d502e7bb547129fc0dfebfe2d80f5,
title = "Inhibin B as a serum marker of spermatogenesis: correlation to differences in sperm concentration and follicle-stimulating hormone levels. A study of 349 Danish men",
abstract = "Recent studies have focused on reproductive health of men in the general population. However, semen samples are difficult to obtain within sampling frames that allow comparisons. Blood samples are easier to obtain than ejaculates. Therefore, serum biomarkers of spermatogenesis are of major interest for population studies. FSH has previously been used as a marker of spermatogenesis, although it is also influenced by the hypothalamus. Serum inhibin B was recently suggested as a possible, more direct serum marker of spermatogenesis in men with testicular disorders. In a Danish nationwide collaborative study, we found an unexpected difference in semen concentration between two groups of men recruited from two different centres. We, therefore, analyzed reproductive hormones in blood, including inhibin B, to test whether the observed difference in semen concentration was reflected in the reproductive hormones. From 1992 to 1995, a total of 430 men, 20-35 yr old, who lived with a partner and who had not previously attempted to achieve a pregnancy, were recruited. The couples were enrolled into the study in one of two centres (centre A, n = 231; and centre B, n = 199) when they discontinued birth control. At enrollment, they provided a semen sample (n = 419), and a blood sample was drawn (n = 349). The semen analysis was performed in accordance with the WHO 1992 guidelines, and interlaboratory differences were tested. Inhibin B was measured in an enzyme immunometric assay, which has previously been described. All blood samples were analyzed in the same laboratory. Median sperm concentration and the percentage of morphologically normal spermatozoa were significantly higher among men from centre A (56.0 mill/mL and 42.5%), compared with men from centre B (44.8 mill/mL and 39%). Men from centre B had a significantly higher median FSH (3.42 IU/L) and a lower inhibin B (186 pg/mL) than men from centre A (3.21 IU/L and 209 pg/mL). The differences persisted after control for potentially confounding variables. A significant correlation was found between the cubic root-transformed serum FSH and inhibin B levels (r = -0.61, P <0.001), between the cubic root-transformed serum FSH and sperm concentration (r = -0.40, P <0.001), and between the cubic root-transformed inhibin B and sperm concentration (r = 0.38, P <0.001). The predictive power of detecting sperm counts below 20 mill/mL among men who's inhibin B and FSH both were below 80 pg/mL and above 10 IU/L, respectively, was 100%. The unexpected significant difference in semen concentration between two groups of normal Danish men was probably caused by differences in sampling procedures in the two centres where the men were recruited, rather than geographical differences. However, similar differences in serum levels of inhibin B and FSH between centres were found. These findings suggest that a real difference in spermatogenic potential between the two groups of men existed. We suggest that serum inhibin B, in future population studies on male reproductive health, may serve as a new marker of spermatogenesis, in addition to sperm concentration and serum FSH.",
keywords = "Adult, Biological Markers, Follicle Stimulating Hormone, Humans, Inhibins, Male, Oligospermia, Osmolar Concentration, Reference Values, Regression Analysis, Semen, Sperm Count, Spermatogenesis",
author = "Jensen, {T K} and Andersson, {A M} and Hj{\o}llund, {Niels Henrik Ingvar} and Thomas Scheike and Henrik Kolstad and A Giwercman and Henriksen, {T B} and E Ernst and Bonde, {J P} and J Olsen and A McNeilly and Groome, {N P} and Skakkebaek, {N E}",
year = "1997",
month = dec,
day = "1",
language = "English",
volume = "82",
pages = "4059--63",
journal = "Journal of Clinical Endocrinology and Metabolism",
issn = "0021-972X",
publisher = "Oxford University Press",
number = "12",

}

RIS

TY - JOUR

T1 - Inhibin B as a serum marker of spermatogenesis: correlation to differences in sperm concentration and follicle-stimulating hormone levels. A study of 349 Danish men

AU - Jensen, T K

AU - Andersson, A M

AU - Hjøllund, Niels Henrik Ingvar

AU - Scheike, Thomas

AU - Kolstad, Henrik

AU - Giwercman, A

AU - Henriksen, T B

AU - Ernst, E

AU - Bonde, J P

AU - Olsen, J

AU - McNeilly, A

AU - Groome, N P

AU - Skakkebaek, N E

PY - 1997/12/1

Y1 - 1997/12/1

N2 - Recent studies have focused on reproductive health of men in the general population. However, semen samples are difficult to obtain within sampling frames that allow comparisons. Blood samples are easier to obtain than ejaculates. Therefore, serum biomarkers of spermatogenesis are of major interest for population studies. FSH has previously been used as a marker of spermatogenesis, although it is also influenced by the hypothalamus. Serum inhibin B was recently suggested as a possible, more direct serum marker of spermatogenesis in men with testicular disorders. In a Danish nationwide collaborative study, we found an unexpected difference in semen concentration between two groups of men recruited from two different centres. We, therefore, analyzed reproductive hormones in blood, including inhibin B, to test whether the observed difference in semen concentration was reflected in the reproductive hormones. From 1992 to 1995, a total of 430 men, 20-35 yr old, who lived with a partner and who had not previously attempted to achieve a pregnancy, were recruited. The couples were enrolled into the study in one of two centres (centre A, n = 231; and centre B, n = 199) when they discontinued birth control. At enrollment, they provided a semen sample (n = 419), and a blood sample was drawn (n = 349). The semen analysis was performed in accordance with the WHO 1992 guidelines, and interlaboratory differences were tested. Inhibin B was measured in an enzyme immunometric assay, which has previously been described. All blood samples were analyzed in the same laboratory. Median sperm concentration and the percentage of morphologically normal spermatozoa were significantly higher among men from centre A (56.0 mill/mL and 42.5%), compared with men from centre B (44.8 mill/mL and 39%). Men from centre B had a significantly higher median FSH (3.42 IU/L) and a lower inhibin B (186 pg/mL) than men from centre A (3.21 IU/L and 209 pg/mL). The differences persisted after control for potentially confounding variables. A significant correlation was found between the cubic root-transformed serum FSH and inhibin B levels (r = -0.61, P <0.001), between the cubic root-transformed serum FSH and sperm concentration (r = -0.40, P <0.001), and between the cubic root-transformed inhibin B and sperm concentration (r = 0.38, P <0.001). The predictive power of detecting sperm counts below 20 mill/mL among men who's inhibin B and FSH both were below 80 pg/mL and above 10 IU/L, respectively, was 100%. The unexpected significant difference in semen concentration between two groups of normal Danish men was probably caused by differences in sampling procedures in the two centres where the men were recruited, rather than geographical differences. However, similar differences in serum levels of inhibin B and FSH between centres were found. These findings suggest that a real difference in spermatogenic potential between the two groups of men existed. We suggest that serum inhibin B, in future population studies on male reproductive health, may serve as a new marker of spermatogenesis, in addition to sperm concentration and serum FSH.

AB - Recent studies have focused on reproductive health of men in the general population. However, semen samples are difficult to obtain within sampling frames that allow comparisons. Blood samples are easier to obtain than ejaculates. Therefore, serum biomarkers of spermatogenesis are of major interest for population studies. FSH has previously been used as a marker of spermatogenesis, although it is also influenced by the hypothalamus. Serum inhibin B was recently suggested as a possible, more direct serum marker of spermatogenesis in men with testicular disorders. In a Danish nationwide collaborative study, we found an unexpected difference in semen concentration between two groups of men recruited from two different centres. We, therefore, analyzed reproductive hormones in blood, including inhibin B, to test whether the observed difference in semen concentration was reflected in the reproductive hormones. From 1992 to 1995, a total of 430 men, 20-35 yr old, who lived with a partner and who had not previously attempted to achieve a pregnancy, were recruited. The couples were enrolled into the study in one of two centres (centre A, n = 231; and centre B, n = 199) when they discontinued birth control. At enrollment, they provided a semen sample (n = 419), and a blood sample was drawn (n = 349). The semen analysis was performed in accordance with the WHO 1992 guidelines, and interlaboratory differences were tested. Inhibin B was measured in an enzyme immunometric assay, which has previously been described. All blood samples were analyzed in the same laboratory. Median sperm concentration and the percentage of morphologically normal spermatozoa were significantly higher among men from centre A (56.0 mill/mL and 42.5%), compared with men from centre B (44.8 mill/mL and 39%). Men from centre B had a significantly higher median FSH (3.42 IU/L) and a lower inhibin B (186 pg/mL) than men from centre A (3.21 IU/L and 209 pg/mL). The differences persisted after control for potentially confounding variables. A significant correlation was found between the cubic root-transformed serum FSH and inhibin B levels (r = -0.61, P <0.001), between the cubic root-transformed serum FSH and sperm concentration (r = -0.40, P <0.001), and between the cubic root-transformed inhibin B and sperm concentration (r = 0.38, P <0.001). The predictive power of detecting sperm counts below 20 mill/mL among men who's inhibin B and FSH both were below 80 pg/mL and above 10 IU/L, respectively, was 100%. The unexpected significant difference in semen concentration between two groups of normal Danish men was probably caused by differences in sampling procedures in the two centres where the men were recruited, rather than geographical differences. However, similar differences in serum levels of inhibin B and FSH between centres were found. These findings suggest that a real difference in spermatogenic potential between the two groups of men existed. We suggest that serum inhibin B, in future population studies on male reproductive health, may serve as a new marker of spermatogenesis, in addition to sperm concentration and serum FSH.

KW - Adult

KW - Biological Markers

KW - Follicle Stimulating Hormone

KW - Humans

KW - Inhibins

KW - Male

KW - Oligospermia

KW - Osmolar Concentration

KW - Reference Values

KW - Regression Analysis

KW - Semen

KW - Sperm Count

KW - Spermatogenesis

M3 - Journal article

C2 - 9398713

VL - 82

SP - 4059

EP - 4063

JO - Journal of Clinical Endocrinology and Metabolism

JF - Journal of Clinical Endocrinology and Metabolism

SN - 0021-972X

IS - 12

ER -