The Measurement of Bone Calcium Level Using the Atomic Absorption
3. Result and Discussion
The average of bone calcium level was gained from the measurement of bone calcium level in rats Rattus norvegicus Sprague‐Dawley strain ovariectomized model. Those rats were given the teraphy of etanolic extract of seeds of pumpkin C moschata and measured of bone calcium level with AAS methods. The result is shown in Table . Table 1.The average of bone calcium level. No Group Bone calcium level + SD . Normal 8. + . . OVX . + . . OVX‐Estradiol . + . . OVX‐ECM mgkg BW . + .88 . OVX‐ECM mgkg BW 8. ± . . OVX‐ECM mgkg BW 8. 8 ± . Ovariectomy is a process to take away the ovarium in order to make the model rats become menopause. The assumption is that after the ovariectomy, the rats will experience the decreasing of estrogen hormone and it is similar to the hormone deficiency in menopause women. The decreasing of the estrogen hormone after the ovariectomy because the ovarium as the hormone producer is alredy been removed. The decreasing of estrogen hormone in the animal model is proven by artiningsih et al., who explains that the ovariectomy in rats can decrease drastically the estrogen hormone level, so the condition is similar to menopause. The bone calcium level is different between normal group and OVX group. The normal rat treatment group is the groups that have normal ovarium and they still produce estrogen endogen hormone. The average of bone calcium level at the normal group is 8. , and it is higher than OVX group, . . Although the difference is not significant based on the statistic analysis. The decreasing of bone calcium in the OVX group is to prove that that estrogen deficiency in the ovariectomy rats also decrease the bone calcium level Nurrochmad et al., also state the same result . Estrogen endogen deficiency in the menopause women can lead to the increasing of osteoclastogenesis process and the loss of bone mass. n order to keep the estrogen balance, menopause women need to get substitute for the estrogen hormone. Estrogen intake can increase the apoptosis of osteoclasts as it hinders the formation of cytokine that can stimulate the osteoclasts differentiation L‐ , L‐ , dan TNF‐α . Besides, the estrogen intake can also stimulates the osteoprotegerin OPG expression and TGF‐β Transforming Growth Factor‐β from the osteoblast and stroma cells, so the process can hamper bone resorption NOS, ; Kennedy et al., 8 . t is in line with the result of calcium level in OVX‐Estradiol, which get the Estradiol therapy. The average of the calcium level is . and it is higher than the OVX group. The administration of ECM , and 8 mgkg BB effectively prevented OVX‐ induced lowering calcium bone level. ECM is phytoestrogens from seed C.moschata agent containing isoflavones types of phenolic glycosides. Phytoestrogens have two hydroxyl O . O group that is the basic structure of a substrate in order to have estrogenic effects, so it is able to bind to estrogen receptors. The chemical structure of phytoestrogens have similar chemical structure to estrogen in mammals. soflavones areParts
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