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Aydin, Suleyman,Ozercan, I brahim Hanefi,Geckil, Hikmet,Dagli, Ferda,Aydin, Suna,Kumru, Sinem,Kilic, Nermin,Sahin, I brahim,Ozercan, Mehmet Resat Korean Society for Biochemistry and Molecular Biol 2007 Journal of biochemistry and molecular biology Vol.40 No.3
Ghrelin belongs to the family of a gut-brain hormone that promotes food intake and controls energy balance. Recently, it has also been shown to regulate bone formation directly. Dental tissue shares several functional, developmental and anatomical similarities with bone, and in the present study we have investigated the presence of ghrelin in 44 human teeth using immunocytochemistry and radioimmunoassay. Both methods showed that the hormone is present in canines and molars, mainly in the odontoblasts but also in the pulp. Ghrelin could potentially play interesting physiological roles in teeth.
Zinc Picolinate in the Prevention of Leiomyoma in Japanese Quail
Nurhan Sahin,Mehmet Tuzcu,İbrahim Ozercan,Kazim Sahin,Ananda S. Prasad,Omer Kucuk 한국식품영양과학회 2009 Journal of medicinal food Vol.12 No.6
Epidemiologic studies suggest that zinc deficiency may be associated with increased risk of cancer. We investigated the effects of zinc picolinate supplementation on the development of leiomyomas, malondialdehyde (MDA), 8-isoprostane, 4-hydroxyalkenal (HAE), and 8-hydroxy-2′-deoxyguanosine (8-OHdG) levels, and heat shock protein 70 (Hsp70) expression in Japanese quails. One hundred fifty quails (6 months old) were assigned to three treatment groups consisting of 50 birds in each group. Birds were fed either a basal diet or the basal diet supplemented with 30mg or 60mg of zinc/kg of diet. The animals were sacrificed after 350 days, and the tumors were identified. Zinc picolinate supplementation did not affect the number of leiomyomas compared to control birds (P>.05). However, the tumors in zinc-fed birds were smaller than those found in control birds (P=.01) Serum MDA, 8-isoprostane, and HAE levels were lower in the treatment groups than in the control group: MDA, 1.95 versus 0.93μmol/L; 8-isoprostane, 108 versus 85pg/mL; HAE, 1.55 versus 0.96μmol/L (P=.01 for all three parameters). The concentrations of serum 8-OHdG, which is a marker of oxidative damage, in the groups were 28.5, 23.6, and 20.1ng/mL, respectively (P=.01). Hsp70 expression was significantly decreased in zinc-treated birds (P<.01). The results indicate that dietary zinc picolinate supplementation reduces the growth of spontaneously occurring leiomyomas of the oviduct in the Japanese quail. Clinical trials should be conducted to investigate the efficacy of zinc supplementation in the prevention and treatment of uterine leiomyoma in humans.