Evidence that chronic hypoxia causes reversible impairment on male fertility

Aim： To evaluate the effect of chronic hypoxia on human spermatogenic parameters and their recovery time. Methods： Seminological parameters of six male healthy mountain trekkers were evaluated in normoxia at sea level. After 26 days exposure to altitude （ranging from 2 000 m to 5 600 m, Karakorum Ex...

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Vydané v:	Asian journal of andrology Ročník 10; číslo 4; s. 602 - 606
Hlavní autori:	Verratti, Vittore, Berardinelli, Francesco, Di Giulio, Camillo, Bosco, Gerardo, Cacchio, Marisa, Pellicciotta, Mario, Nicolai, Michele, Martinotti, Stefano, Tenaglia, Raffaele
Médium:	Journal Article
Jazyk:	English
Vydavateľské údaje:	Oxford, UK Blackwell Publishing Ltd 01.07.2008 Medknow Publications & Media Pvt. Ltd
Predmet:	Adaptation, Physiological - physiology Adult Aged Altitude high altitude Humans hypoxia Hypoxia - complications Infertility, Male - etiology Infertility, Male - pathology Infertility, Male - physiopathology Male male fertility Middle Aged Mountaineering Oligospermia - etiology Oligospermia - pathology Oligospermia - physiopathology seminological parameters Sperm Count Sperm Motility - physiology Spermatogenesis - physiology 可逆损伤生殖力
ISSN:	1008-682X, 1745-7262
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Abstract	Aim： To evaluate the effect of chronic hypoxia on human spermatogenic parameters and their recovery time. Methods： Seminological parameters of six male healthy mountain trekkers were evaluated in normoxia at sea level. After 26 days exposure to altitude （ranging from 2 000 m to 5 600 m, Karakorum Expedition） the same parameters were again evaluated after returning to sea level. These parameters were once again evaluated after 1 month and then again after 6 months. Results： Sperm count was found to be lower immediately after returning to sea level （P = 0.0004） and again after a month （P = 0.0008）. Normal levels were reached after 6 months. Spermatic motility （%） shows no reduction immediately after returning to sea level （P = 0.0583）, whereas after 1 month this reduction was significant （P = 0.0066）. After 6 months there was a recovery to pre-hypoxic exposure values. Abnormal or immature spermatozoa （%） increased immediately after returning to sea level （P = 0.0067） and then again after 1 month （P = 0.0004）. After 6 months there was a complete recovery to initial values. The total number of motile sperm in the ejaculate was found to be lower immediately after returning to sea level （P = 0.0024） and then again after 1 month （P = 0.0021）. After 6 months there was a recovery to pre-hypoxic exposure values. Conclusion： Chronic hypoxia induces a state of oligospermia and the normalization of such seminological parameters at the restoration of previous normoxic conditions after 6 months indicate the influence of oxygen supply in physiological mechanisms of spermatogenesis and male fertility.
AbstractList	Aim： To evaluate the effect of chronic hypoxia on human spermatogenic parameters and their recovery time. Methods： Seminological parameters of six male healthy mountain trekkers were evaluated in normoxia at sea level. After 26 days exposure to altitude （ranging from 2 000 m to 5 600 m, Karakorum Expedition） the same parameters were again evaluated after returning to sea level. These parameters were once again evaluated after 1 month and then again after 6 months. Results： Sperm count was found to be lower immediately after returning to sea level （P = 0.0004） and again after a month （P = 0.0008）. Normal levels were reached after 6 months. Spermatic motility （%） shows no reduction immediately after returning to sea level （P = 0.0583）, whereas after 1 month this reduction was significant （P = 0.0066）. After 6 months there was a recovery to pre-hypoxic exposure values. Abnormal or immature spermatozoa （%） increased immediately after returning to sea level （P = 0.0067） and then again after 1 month （P = 0.0004）. After 6 months there was a complete recovery to initial values. The total number of motile sperm in the ejaculate was found to be lower immediately after returning to sea level （P = 0.0024） and then again after 1 month （P = 0.0021）. After 6 months there was a recovery to pre-hypoxic exposure values. Conclusion： Chronic hypoxia induces a state of oligospermia and the normalization of such seminological parameters at the restoration of previous normoxic conditions after 6 months indicate the influence of oxygen supply in physiological mechanisms of spermatogenesis and male fertility. To evaluate the effect of chronic hypoxia on human spermatogenic parameters and their recovery time.AIMTo evaluate the effect of chronic hypoxia on human spermatogenic parameters and their recovery time.Seminological parameters of six male healthy mountain trekkers were evaluated in normoxia at sea level. After 26 days exposure to altitude (ranging from 2 000 m to 5 600 m, Karakorum Expedition) the same parameters were again evaluated after returning to sea level. These parameters were once again evaluated after 1 month and then again after 6 months.METHODSSeminological parameters of six male healthy mountain trekkers were evaluated in normoxia at sea level. After 26 days exposure to altitude (ranging from 2 000 m to 5 600 m, Karakorum Expedition) the same parameters were again evaluated after returning to sea level. These parameters were once again evaluated after 1 month and then again after 6 months.Sperm count was found to be lower immediately after returning to sea level (P = 0.0004) and again after a month (P = 0.0008). Normal levels were reached after 6 months. Spermatic motility (%) shows no reduction immediately after returning to sea level (P = 0.0583), whereas after 1 month this reduction was significant (P = 0.0066). After 6 months there was a recovery to pre-hypoxic exposure values. Abnormal or immature spermatozoa (%) increased immediately after returning to sea level (P = 0.0067) and then again after 1 month (P = 0.0004). After 6 months there was a complete recovery to initial values. The total number of motile sperm in the ejaculate was found to be lower immediately after returning to sea level (P = 0.0024) and then again after 1 month (P = 0.0021). After 6 months there was a recovery to pre-hypoxic exposure values.RESULTSSperm count was found to be lower immediately after returning to sea level (P = 0.0004) and again after a month (P = 0.0008). Normal levels were reached after 6 months. Spermatic motility (%) shows no reduction immediately after returning to sea level (P = 0.0583), whereas after 1 month this reduction was significant (P = 0.0066). After 6 months there was a recovery to pre-hypoxic exposure values. Abnormal or immature spermatozoa (%) increased immediately after returning to sea level (P = 0.0067) and then again after 1 month (P = 0.0004). After 6 months there was a complete recovery to initial values. The total number of motile sperm in the ejaculate was found to be lower immediately after returning to sea level (P = 0.0024) and then again after 1 month (P = 0.0021). After 6 months there was a recovery to pre-hypoxic exposure values.Chronic hypoxia induces a state of oligospermia and the normalization of such seminological parameters at the restoration of previous normoxic conditions after 6 months indicate the influence of oxygen supply in physiological mechanisms of spermatogenesis and male fertility.CONCLUSIONChronic hypoxia induces a state of oligospermia and the normalization of such seminological parameters at the restoration of previous normoxic conditions after 6 months indicate the influence of oxygen supply in physiological mechanisms of spermatogenesis and male fertility. Aim: To evaluate the effect of chronic hypoxia on human spermatogenic parameters and their recovery time. Methods: Seminological parameters of six male healthy mountain trekkers were evaluated in normoxia at sea level. After 26 days exposure to altitude (ranging from 2 000 m to 5 600 m, Karakorum Expedition) the same parameters were again evaluated after returning to sea level. These parameters were once again evaluated after 1 month and then again after 6 months. Results: Sperm count was found to be lower immediately after returning to sea level (P= 0.0004) and again after a month (P= 0.0008). Normal levels were reached after 6 months. Spermatic motility (%) shows no reduction immediately after returning to sea level (P= 0.0583), whereas after 1 month this reduction was significant (P= 0.0066). After 6 months there was a recovery to pre‐hypoxic exposure values. Abnormal or immature spermatozoa (%) increased immediately after returning to sea level (P= 0.0067) and then again after 1 month (P= 0.0004). After 6 months there was a complete recovery to initial values. The total number of motile sperm in the ejaculate was found to be lower immediately after returning to sea level (P= 0.0024) and then again after 1 month (P= 0.0021). After 6 months there was a recovery to pre‐hypoxic exposure values. Conclusion: Chronic hypoxia induces a state of oligospermia and the normalization of such seminological parameters at the restoration of previous normoxic conditions after 6 months indicate the influence of oxygen supply in physiological mechanisms of spermatogenesis and male fertility. To evaluate the effect of chronic hypoxia on human spermatogenic parameters and their recovery time. Seminological parameters of six male healthy mountain trekkers were evaluated in normoxia at sea level. After 26 days exposure to altitude (ranging from 2 000 m to 5 600 m, Karakorum Expedition) the same parameters were again evaluated after returning to sea level. These parameters were once again evaluated after 1 month and then again after 6 months. Sperm count was found to be lower immediately after returning to sea level (P = 0.0004) and again after a month (P = 0.0008). Normal levels were reached after 6 months. Spermatic motility (%) shows no reduction immediately after returning to sea level (P = 0.0583), whereas after 1 month this reduction was significant (P = 0.0066). After 6 months there was a recovery to pre-hypoxic exposure values. Abnormal or immature spermatozoa (%) increased immediately after returning to sea level (P = 0.0067) and then again after 1 month (P = 0.0004). After 6 months there was a complete recovery to initial values. The total number of motile sperm in the ejaculate was found to be lower immediately after returning to sea level (P = 0.0024) and then again after 1 month (P = 0.0021). After 6 months there was a recovery to pre-hypoxic exposure values. Chronic hypoxia induces a state of oligospermia and the normalization of such seminological parameters at the restoration of previous normoxic conditions after 6 months indicate the influence of oxygen supply in physiological mechanisms of spermatogenesis and male fertility. To evaluate the effect of chronic hypoxia on human spermatogenic parameters and their recovery time. Seminological parameters of six male healthy mountain trekkers were evaluated in normoxia at sea level. After 26 days exposure to altitude (ranging from 2 000 m to 5 600 m, Karakorum Expedition) the same parameters were again evaluated after returning to sea level. These parameters were once again evaluated after 1 month and then again after 6 months. Sperm count was found to be lower immediately after returning to sea level (P = 0.0004) and again after a month (P = 0.0008). Normal levels were reached after 6 months. Spermatic motility (%) shows no reduction immediately after returning to sea level (P = 0.0583), whereas after 1 month this reduction was significant (P = 0.0066). After 6 months there was a recovery to pre-hypoxic exposure values. Abnormal or immature spermatozoa (%) increased immediately after returning to sea level (P = 0.0067) and then again after 1 month (P = 0.0004). After 6 months there was a complete recovery to initial values. The total number of motile sperm in the ejaculate was found to be lower immediately after returning to sea level (P = 0.0024) and then again after 1 month (P = 0.0021). After 6 months there was a recovery to pre-hypoxic exposure values. Chronic hypoxia induces a state of oligospermia and the normalization of such seminological parameters at the restoration of previous normoxic conditions after 6 months indicate the influence of oxygen supply in physiological mechanisms of spermatogenesis and male fertility.
Author	Vittore Verratti Francesco Berardinelli Camillo Di Giulio Gerardo Bosco Marisa Cacchio Mario Pellicciotta Michele Nicolai Stefano Martinotti Raffaele Tenaglia
AuthorAffiliation	Department of Medicine and Aging Science, University of Chieti, Chieti 66013, Italy Department of Basic and Applied Medical Sciences, University of Chieti, Chieti 66013, Italy Biostatistical Office, Regina Elena Institute, Rome 00144, Italy Laboratorio di Patologia Clinica H, University of Chieti, Chieti 66013, Italy
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Snippet	Aim： To evaluate the effect of chronic hypoxia on human spermatogenic parameters and their recovery time. Methods： Seminological parameters of six male... Aim: To evaluate the effect of chronic hypoxia on human spermatogenic parameters and their recovery time. Methods: Seminological parameters of six male healthy... To evaluate the effect of chronic hypoxia on human spermatogenic parameters and their recovery time. Seminological parameters of six male healthy mountain... To evaluate the effect of chronic hypoxia on human spermatogenic parameters and their recovery time. Seminological parameters of six male healthy mountain... To evaluate the effect of chronic hypoxia on human spermatogenic parameters and their recovery time.AIMTo evaluate the effect of chronic hypoxia on human...
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SubjectTerms	Adaptation, Physiological - physiology Adult Aged Altitude high altitude Humans hypoxia Hypoxia - complications Infertility, Male - etiology Infertility, Male - pathology Infertility, Male - physiopathology Male male fertility Middle Aged Mountaineering Oligospermia - etiology Oligospermia - pathology Oligospermia - physiopathology seminological parameters Sperm Count Sperm Motility - physiology Spermatogenesis - physiology 可逆损伤生殖力
Title	Evidence that chronic hypoxia causes reversible impairment on male fertility
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