NDLI: Changes of Iron Stores and Duodenal Transepithelial Iron Transfer During Regular Exercise in Rats

Content Provider	Springer Nature Link
Author	Che, Li Long Xiao, De Sheng Xu, Hua Xi Lu, Liwei
Copyright Year	2010
Abstract	It is unclear whether regular exercise depletes body iron stores and how exercise regulates iron absorption. In this study, growing female Sprague–Dawley rats were fed a high-iron diet (300 mg iron/kg) and subjected to swimming for 1, 3, or 12 months. Their body weight, liver nonheme iron content (NHI), spleen NHI, blood hemoglobin (Hb) concentration, hematocrit (Hct), and kinetics of $^{59}$Fe transfer across isolated duodenal segments were then compared with sedentary controls. The main results were as follows: exercise for 1 month enhanced the transepithelial $^{59}$Fe transfer and increased liver NHI content and Hb concentration; exercise for 3 months inhibited transepithelial $^{59}$Fe transfer without affecting the liver and spleen NHI content, Hb concentration, and Hct; exercise for 12 months did not affect these parameters as compared with the corresponding sedentary controls; and the changes in transepithelial iron transfer were not associated with basolateral iron transfer. Our findings demonstrated that chronic, regular exercise in growing rats with a high dietary iron content does not deplete iron stores in the liver and spleen and may possibly enhance or inhibit duodenal iron absorption and even maintain duodenal iron absorption at the sedentary level, at least, in part depending on growth.
Starting Page	1044
Ending Page	1053
Page Count	10
File Format	PDF
ISSN	01634984
Journal	Biological Trace Element Research
Volume Number	143
Issue Number	2
e-ISSN	15590720
Language	English
Publisher	Humana Press Inc
Publisher Date	2010-12-21
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Exercise Iron stores Iron transfer Iron absorption Nutrition Oncology Biotechnology Biochemistry
Content Type	Text
Resource Type	Article
Subject	Biochemistry (medical) Endocrinology, Diabetes and Metabolism Clinical Biochemistry Biochemistry Inorganic Chemistry

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