ABSTRACT
Introduction. Luteinizing hormone is slowly increasing in menopausal transition phase, it’s maintain to increase till early post menopause phase (Gore et al. 2004). It is related to steroid hormone’s negative feedback and estradiol’s positive feedback (Rossmanith 1995), and in addition, recently years kisspeptin-10 of hypothalamus [1]. LH is dramatically decreasing at the rather late of post menopause phase (Hall et al. 2000, Gill et al 2002). By the year 2030, more than 1.2 billion women in the world will be at least 50 years old. This increasing proportion of the female population will be experiencing the menopausal transition with its accompanying physiology and pathophysiology [2]. Recently researchers more focused to study the comparative analysis of hormones at the menopause phase in different ethnic groups. This kind of study have not implemented in our country yet.Goal.Determination of serum LH level changes in relation to aging. Materials and Methods. In this study were involved 161 healthy Mongolian women aged above 35 years. Subjects were randomly selected and undergone physical examination by geriatrician. People, who are receiving hormone replacement therapy, using in proper use of alcohol, injured and had survey, were excluded from our study. Blood samples were collected in the morning 8.30-10.30 AM, after a night fasting. Blood was separated immediately by centrifugation, then obtained sera were stored at -20 0C until assayed by ELISA kit from United Biotech CoLTD, USA, which sensitivity is 1mlU/ml. Statistical analyses have been performed by statistical software SPSS 17, using ANOVA, Pearson correlation.Results. Average level of LH was 29.95±3.31mIU/ml, 15.87±5.86mIU/ml at the age 35-45, 33.12±7.1mIU/ml at the age 46-55, 15.87±ImU/ml at the age 56-65, 38.15±6.6mIU/ml at the age 66-75, and 56.42±11.1mlIU/ml over 76 age in the all participants, considering by person correlation coefficient, between age and LH are moderate and direct correlation (r=0.264, ð 0.003).Conclusion. Average level of LH was 29.95±3.31mIU/ml in women aged over 35. Considering by person correlation coefficient, between age and LH are moderate and direct correlation (r=0.264, ð 0.003). LH increases with aging till round 70 and decreases after 70 years.
ABSTRACT
INTRODUCTION: Gonadotropins are released under the control of gonadotropin-releasing hormone (GnRH) from thearcuate nucleus and preoptic area of the hypothalamus. The gonads — testes and ovaries — are the primary targetorgans for LH and FSH. The gonadotropins affect multiple cell types and elicit multiple responses from the targetorgans. As a simplified generalization, LH stimulates the Leydig cells of the testes and the theca cells of the ovaries to produce testosterone (and indirectly estradiol), while FSH stimulates the spermatogenic tissue of the testes andthe granulosa cells of ovarian follicles.Reproductive aging is endocrinologically characterized by a progressive rise in serum FSH levels associated with adecrease in serum estradiol (E2) and testosterone (T) levels. The rise in FSH is associated with reduced levels of sexsteroid and peptide negative feedback regulators of FSH secretion.The aim of study is: determination of serum FSH level changes in relation to aging and sex.MATERIALS AND METHODS: In this study were involved 169 healthy Mongolian adults aged above 45 years old. Subjectswere randomly selected and undergone physical examination by geriatrician. People, who are receiving hormonereplacement therapy, using inproper use of alcohol, injured and had surgery were excluded from our surgery. Bloodsamples were collected in the early morning (8.30–10.30 AM) after an all night fast and plasma was separatedimmediately by centrifugation; then sera obtained were stored at -20°C until assayed by ELISA kit from United BiotechCoLTD, USA, which sensitivity is 1mIU/ml. Statistical analyses have been performed by statistical software SPSS 16,using ANOVA, Pearson correlation, T-test.RESULT: Mean level of FSH for both sexes was 21.19±16.2 mIU/ml, which is in comparison with males (12.33±10.58mIU/ml) it was comparatively higher (p0.05), but in women it was stronger correlation (r=0.203, p<0.05). in 51-60 years age group FSH wasincreased by 56%, in 61-65 years group by 91%, in 66-70 years group it was increased 100% in comparison with until50 years age group. In older age (above 70 years) it decreased to 70% from reached concentration. ANOVA analysishas not showed significant difference between age groups.CONCLUSIONS: Average mean of FSH in old age are: 29.61±16.15 mIU/ml in women and 12.33±10.58 mIU/ml in men.Correlation with aging was observed stronger in women than in man (r=0.203, p<0.05). FSH increases with aging untilround 70 and decreases after 70 years old.