Effects of Subchronic Aluminum Exposure on the Reproductive Function in Female Rats

College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China.
Biological trace element research (Impact Factor: 1.75). 09/2011; 145(3):382-7. DOI: 10.1007/s12011-011-9200-0
Source: PubMed


The aim of this study was to investigate the effects of aluminum (Al) exposure on the reproductive function in female rats. Forty female Wistar (5 weeks old) rats, weighing 110-120 g, were divided randomly into four groups. They were orally administrated with 0, 64.18, 128.36, and 256.72 mg aluminum chloride (AlCl(3)) per kilogram body weight in drinking water for 120 days. Levels of Al, estrogen (E(2)), progestogen (P), testosterone (T), follicle-stimulating hormone (FSH), and luteinizing hormone (LH) in serum were measured at the end of experiment. The results showed that levels of E(2), P, FSH, and LH were significantly lower and Al concentration was significantly higher in all three Al-treated groups than those in the control group (GC). The level of T was significantly higher in the low- and medium-dose groups (GL and GM) (P < 0.05) but not in high-dose group (GH) compared with GC. The results suggest that the reproductive function of female rats is inhibited under long-term Al exposure in an Al dose-dependent manner.

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    • "AlCl 3 was chosen because it is a form of highly enriched salt in the earth. Consumptions of AlCl 3 damaged the structure of the ovary, disturbed the metabolic balances of trace minerals like Fe, Cu and Zn, inhibited the activities of many enzymes such as ACP, ALP, SDH, ATPase, and decreased the contents of LH and FSH (Wang et al., 2011) as well as the expressions of their receptors. These results imply that AlCl 3 exposure disrupts the structure and function of the ovary, in general, by decreasing energy production and possible ovulation. "
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    ABSTRACT: Aims This experiment investigated the effects of sub-chronic aluminum chloride (AlCl3) exposure on ovary of rats. Materials and Methods Eighty female Wistar (5 weeks old) rats, weighed 110 ~ 120 g, were randomly divided into four treatment groups: control group (CG), low-dose group (LG, 64 mg/kg BW AlCl3), mid-dose group (MG, 128 mg/kg BW AlCl3) and high-dose group (HG, 256 mg/kg BW AlCl3). The AlCl3 was administered in drinking water for 120 days. The ovarian ultrastructure was observed. The activities of acid phosphatase (ACP), alkaline phosphatase (ALP), succinate dehydrogenase (SDH), Na+-K+-ATPase, Mg2 +-ATPase and Ca2 +-ATPase, the contents of Fe, Cu and Zn, and the protein expression of follicle-stimulating hormone receptor (FSHR) and luteinizing hormone receptor (LHR) in the ovary were determined. Key findings The results showed that the structure of ovary was disrupted, the activities of ALP, ACP, SDH, Na+-K+-ATPase, Mg2 +-ATPase and Ca2 +-ATPase, the contents of Zn, Fe and the protein expression of FSHR and LHR were lowered, and the content of Cu was increased in AlCl3-treated rats than those in control. Significance The results indicate that sub-chronic AlCl3 exposure caused the damage of ovarian structure, the disturbed metabolism of Fe, Zn and Cu and decreased activities of Na+-K+-ATPase, Mg2 +-ATPase and Ca2 +-ATPase in the ovary, which could result in suppressed energy supply in the ovary. A combination of suppression of energy supply and reduction of expression of FSHR and LHR could inhibit ovulation and corpus luteum development, leading to infertility in female rats.
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    ABSTRACT: The aim of this study was to investigate the effects of sodium fluoride (NaF) on female reproductive function and examine the morphology of the ovaries and uteri of rats exposed to NaF. Eighty female Sprague-Dawley (SD) rats were divided randomly into four groups of twenty: one control group and three NaF treated groups. The three NaF treated groups received 100, 150, and 200 ppm, respectively, of NaF for 6 months via their drinking water, while the control group (GC) received distilled water. The levels of follicle-stimulating hormone (FSH), luteinizing hormone (LH), testosterone (T), progesterone (P) and estradiol (E2) were measured using an enzyme-linked immunosorbent assay. Pathomorphological evaluation of the uteri and ovaries was conducted after staining with hematoxylin-eosin and immunohistochemistry. The rate of successful pregnancy in the NaF-treated groups declined in a dose-dependent manner. The concentration of reproductive hormones was significantly lower in the three NaF-treated groups, and the endometrium was damaged. The maturation of follicles was inhibited. In addition, the total number of follicles of all types was significantly lower in the NaF-treated groups. These results suggest that female reproductive function is inhibited by NaF and that exposure to NaF causes ovarian and uterine structural damage. NaF may thus significantly reduce the fertility of female rats.
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