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Environmental Factors That Affect Parathyroid Hormone and Calcitonin Levels. Int J Mol Sci 2021; 23:ijms23010044. [PMID: 35008468 PMCID: PMC8744774 DOI: 10.3390/ijms23010044] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 12/17/2021] [Accepted: 12/19/2021] [Indexed: 12/23/2022] Open
Abstract
Calciotropic hormones, parathyroid hormone (PTH) and calcitonin are involved in the regulation of bone mineral metabolism and maintenance of calcium and phosphate homeostasis in the body. Therefore, an understanding of environmental and genetic factors influencing PTH and calcitonin levels is crucial. Genetic factors are estimated to account for 60% of variations in PTH levels, while the genetic background of interindividual calcitonin variations has not yet been studied. In this review, we analyzed the literature discussing the influence of environmental factors (lifestyle factors and pollutants) on PTH and calcitonin levels. Among lifestyle factors, smoking, body mass index (BMI), diet, alcohol, and exercise were analyzed; among pollutants, heavy metals and chemicals were analyzed. Lifestyle factors that showed the clearest association with PTH levels were smoking, BMI, exercise, and micronutrients taken from the diet (vitamin D and calcium). Smoking, vitamin D, and calcium intake led to a decrease in PTH levels, while higher BMI and exercise led to an increase in PTH levels. In terms of pollutants, exposure to cadmium led to a decrease in PTH levels, while exposure to lead increased PTH levels. Several studies have investigated the effect of chemicals on PTH levels in humans. Compared to PTH studies, a smaller number of studies analyzed the influence of environmental factors on calcitonin levels, which gives great variability in results. Only a few studies have analyzed the influence of pollutants on calcitonin levels in humans. The lifestyle factor with the clearest relationship with calcitonin was smoking (smokers had increased calcitonin levels). Given the importance of PTH and calcitonin in maintaining calcium and phosphate homeostasis and bone mineral metabolism, additional studies on the influence of environmental factors that could affect PTH and calcitonin levels are crucial.
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Tsukahara Y, Torii S, Yamasawa F, Iwamoto J, Otsuka T, Goto H, Kusakabe T, Matsumoto H, Akama T. Bone parameters of elite athletes with oligomenorrhea and prevalence seeking medical attention: a cross-sectional study. J Bone Miner Metab 2021; 39:1009-1018. [PMID: 34101019 DOI: 10.1007/s00774-021-01234-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Accepted: 04/28/2021] [Indexed: 10/21/2022]
Abstract
INTRODUCTION Since the definition of secondary amenorrhea is cessation of regular menses for more than 3 months, it is likely that athletes with irregular menstrual cycles, including oligomenorrhea, do not consider the condition as serious. However, the consequences of untreated oligomenorrhea have not been investigated in elite track and field athletes. MATERIALS AND METHODS The cohort consisted of 91 elite-level track and field athletes. Body compositions, including bone parameters and bone turnover markers (BTMs), were measured. RESULTS Among the 91 participants, 52 were eumenorrheic and 33 were oligomenorrheic. The eumenorrheic athletes had significantly higher bone mineral density (BMD) and bone mineral content (BMC) of the lumbar spine, lower extremities, and whole body than had the oligomenorrheic athletes (p < 0.01). There were no significant differences in BTMs between the two groups, but oligomenorrheic athletes had significantly lower percent body fat. CONCLUSION More than 40% of the elite-level female track and field athletes in this study reported menstrual disorders with oligomenorrhea as the most common. However, none sought medical attention. As compared to the eumenorrheic athletes, the oligomenorrheic athletes had lower BMC and BMD. Hence, if an athlete is oligomenorrheic, bone parameter measurements are considerably important.
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Affiliation(s)
- Yuka Tsukahara
- Waseda Institute for Sport Sciences, Waseda University, 2-579-15 Mikajima, Tokorozawa, Saitama, 359-1192, Japan.
- Institute for Integrated Sports Medicine, Keio University, 35 Shinanomachi, Shinjyuku-ku, Tokyo, 160-0016, Japan.
| | - Suguru Torii
- Faculty of Sport Sciences, Waseda University, 2-579-15 Mikajima, Tokorozawa, Saitama, 359-1192, Japan
| | - Fumihiro Yamasawa
- Marubeni Health Promotion Center, 7-1, Nihonbashi 2-chome, Chuo-ku, Tokyo, 103-6060, Japan
| | - Jun Iwamoto
- Bone and Joint Disease Center, Keiyu Orthopaedic Hospital, 2267 Akoudacho, Tatebayashi, Gunma, 374-0013, Japan
| | - Takanobu Otsuka
- School of Education, Tokai Gakuen University, 901 Nakahira Tempakuku, Nagoya, 468-8514, Japan
| | - Hideyuki Goto
- Department of Health and Fitness, Faculty of Wellness, Shigakkan University, 55 Nakoyama Yokonemachi, Obu, 474-8651, Japan
| | - Torao Kusakabe
- Department of Orthopedic Surgery, Japanese Red-Cross Kyoto Daini Hospital, 355-5 Haruobi-cho, Kamigyo-ku, Kyoto, 602-8026, Japan
| | - Hideo Matsumoto
- Public Interest Incorporated Foundation, Sports Medicine Foundation, 8-1-9 Nishishinjyuku, Shinjyukuku, Tokyo, 160-0023, Japan
| | - Takao Akama
- Faculty of Sport Sciences, Waseda University, 2-579-15 Mikajima, Tokorozawa, Saitama, 359-1192, Japan
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Maruyama-Nagao A, Sakuraba K, Suzuki Y. Seasonal variations in vitamin D status in indoor and outdoor female athletes. Biomed Rep 2016; 5:113-117. [PMID: 27347414 DOI: 10.3892/br.2016.671] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Accepted: 04/25/2016] [Indexed: 11/06/2022] Open
Abstract
Vitamin D (VD) insufficiency is a concern, particularly among young females. The VD status shows seasonal variations, since it correlates with duration of sunlight exposure. VD insufficiency in indoor athletes is therefore suggested in winter. The aim of the present study was to determine seasonal variations in VD and bone status among indoor and outdoor female athletes. The prospective study was conducted in participants aged 20-22 years old. The participants comprised of 15 indoor and 15 outdoor athletes. The biochemical markers and bone parameters were measured in March, June, September and December. The serum 25-hydroxyvitamin D (25-OH-VD) concentration showed a seasonal oscillation, with a nadir in March (indoor, 19±4.0 ng/ml; outdoor, 32±2.7 ng/ml) and a peak in September (indoor, 32±6.6 ng/ml; outdoor, 39±5.7 ng/ml). The amplitude of oscillation was greater in the indoor compared to the outdoor athletes. Seasonal variations in serum calcium exhibited a similar pattern, while the parathyroid hormone showed an inverse pattern to serum 25-OH-VD. The nadir in bone mass, measured as speed of sound, occurred in June after peaking in December among the indoor and outdoor athletes. The pattern followed 3 months after the changes in 25-OH-VD. Indoor sports athletes are more susceptible to VD insufficiency compared to outdoor sports athletes. Insufficiency is most likely to arise in winter, and could affect bone mineralization observed 3 months after.
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Affiliation(s)
- Asako Maruyama-Nagao
- Department of Health and Sports Science, Juntendo University, Inzai, Chiba 270-1695, Japan; Department of Host Defense and Biochemical Research, School of Medicine, Juntendo University, Bunkyo-ku, Tokyo 113-8421, Japan
| | - Keishoku Sakuraba
- Graduate School of Health and Sports Science, Juntendo University, Inzai, Chiba 270-1695, Japan
| | - Yoshio Suzuki
- Graduate School of Health and Sports Science, Juntendo University, Inzai, Chiba 270-1695, Japan
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