Age-dependent increases of calcium and phosphorus in human epiglottal cartilage |
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Authors: | Cho Azuma Setsuko Tohno Pasuk Mahakkanukrauh Yoshiyuki Tohno Nutcharin Ongkana Takeshi Minami Yumi Moriwake Tsukasa Kumai Pidhyasak Vaidhayakarn Masa-Oki Yamada Hirohisa Maruyama |
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Institution: | (1) Laboratory of Cell Biology, Department of Anatomy, School of Medicine, Nara Medical University, Kashihara, 634-8521 Nara, Japan;(2) Department of Anatomy, Faculty of Medicine, Chiang Mai University, 50200 Chiang Mai, Thailand;(3) Laboratory of Environmental Biology, Department of Life Science, Faculty of Science and Engineering, Kinki University, 577-8502 Higashi-Osaka, Osaka, Japan;(4) Hyogo Nutrition Vocational College, Nishinomiya, 662-0833 Hyogo, Japan |
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Abstract: | To elucidate compositional changes of the elastic cartilage with aging, the authors investigated age-related changes of elements
in the epiglottal cartilages by inductively coupled plasma-atomic emission spectrometry. After the ordinary dissection by
medical students at Chiang Mai University was finished, the epiglottises were resected from the subjects. The epiglottal cartilages
were isolated and the element contents were determined. The subjects consisted of 11 men and 14 women, ranging in age from
39 to 92 yr old. It was found that although the extent of accumulation of calcium and phosphorus was slight, calcium and phosphorus
increased progressively in the epiglottal cartilages with aging. In contrast, sulfur, magnesium, zinc, iron and sodium did
not change significantly in them. Regarding the relationships among elements, it was found that there were significant correlations
among calcium, phosphorus, magnesium, and sodium in the epiglottal cartilages, with one exception between calcium and sodium
contents. In comparison between men and women, no significant differences were found in the predominant elements such as calcium,
sulfur, and phosphorus in the epiglottal cartilages. |
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Keywords: | Epiglottis cartilage aging calcium phosphorus |
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