Avaliação do potencial interceptivo da ipriflavona em ratas wist / Evaluation of the potential of interceptive ipriflavone in wistar rats

A ipriflavona possui efeito inibitório sobre o citocromo p450 e sobre a proliferação do DNA, interferindo na síntese de hormônios estereoidianos, e consequente interferência no transporte e desenvolvimento pré-implantacional e na implantação do blastocisto. Consumidos em altas doses pode acarretar abortamentos e malformações. Para verificar a embriotoxicidade da ipriflavona durante as fases de transporte tubário e implantação do blastocisto de ratas, ratas Wistar prenhes foram tratadas duas vezes ao dia com 1mL de suspensão aquosa de ipriflavona, nas doses de 0 (C), 300 (T1), 1500 (T2) e 3000 (T3) mg/kg/dose, durante os oito primeiros dias de prenhez com eutanásia no 14o dia. Indícios de toxicidade foram avaliados por análises hematimétricas, bioquímicas e comportamentais. Foram contados fetos vivos, mortos e reabsorvidos (inicial e tardiamente). Os animais não apresentaram sinais clínicos de toxicidade. Índice de implantação e perdas pré-embrionária sofreram interferência do uso da ipriflavona. Dados apontam para um efeito estrogênico da ipriflavona, observados na interferência da implantação do blastocisto de ratas Wistar.

Ipriflavone has inhibitory effect on the cytochrome p450 and the proliferation of DNA, interfering with hormone synthesis estereoidianos, and consequent interference with the transport and preimplantation development and implantation of the blastocyst. Consumed in high doses can cause miscarriages and malformations. To verify the embryotoxicity of ipriflavone during the phases of tubal transport and implantation of the blastocyst in rats, Wistar rats were treated twice daily with 1 mL of aqueous suspension of ipriflavone at doses of 0 (C), 300 (T1), 1500 (T2) and 3000 (T3) mg / kg / dose during the first eight days of pregnancy with euthanasia on day 14. Signs of toxicity were characterized by hematological, biochemical and behavioral. Live fetuses were counted, dead and resorbed (early and late). The animals showed no clinical signs of toxicity. Index pre-implantation embryo and losses suffered interference from the use of ipriflavone. Data point to an estrogenic effect of ipriflavone, due to interference in blastocyst implantation in Wistar rats.

The effects of ipriflavone on the periodontal reorganization following experimental tooth movement in the rat / 대한치과교정학회지

OBJECTIVE: The purpose of this study was to examine the effect of ipriflavone on periodontal reorganization and prevention of relapse following tooth movement. METHODS: Orthodontic rubber bands were inserted between the first and second maxillary molars of 27 white male rats for 3 weeks for experimental tooth movement. From one day before the removal of orthodontic rubber band, ipriflavone was administered 50 or 400 mg/kg daily in each experimental group whereas carboxymethyl cellulose solution was administered in the control group. They were sacrificed at the 5, 10, and 15th day from the day of removal of orthodontic rubber bands. The amount of relapse was evaluated by measuring the interdental space, and the extent of periodontal reorganization was compared through histological examination. RESULTS: In case of ipriflavone administration, the amount and velocity of relapse was less and slower compared to the control group. In addition, the ipriflavone group showed more rapid periodontal reorganization compared to the control group. CONCLUSIONS: The results of the present study suggest that ipriflavone administration can be used effectively in the prevention of relapse following orthodontic tooth movement through the acceleration of periodontal reorganization.

Effects of Ipriflavone on bone remodeling in the rat calvarial cell / 대한치과교정학회지

Ipriflavone (isoprofoxyisoflavone), a synthetic derivative from soy isoflavone diazein, has been shown to inhibit bone resorption and perhaps stimulate bone formation. This study was performed to examine the effects of ipriflavone on the proliferation and bone remodeling in rat calvarial cells in vitro. The rat calvarial cells were isolated from fetus aged 20 to 21 days and cultured in BGJb media. The graded concentration of ipriflavone (10(-9)-10(-5) M) was administered into cultured cells. When the cell proliferation was estimated through the measurement of MTT assay, there was no increase in cellular proliferation of the rat calvarial cell at any ipriflavone concentration. The cellular activity was evaluated through the formation of mineralized nodules stained by alizarin red. The formation of mineralized nodules significantly increased at concentrations of 10(-8) M, 10(-7) M and 10(-6) M ipriflavone. Reverse transcription-polymerase chain reaction analyses (RT-PCR) were done at 7 and 14 days after culture to detect the expression of Bone Sialoprotein (BSP), Type I Collagen (COL I) and Osteocalcin (OCN). As a result, the expressions of BSP and COL I increased on the 7th day of culture and the expression of OCN increased on the 14th day of culture. These results indicate that ipriflavone facilitates the bone remodeling process by promoting rat calvarial cell differentiation and stimulating mineralization through increased expression of extracellular matrix genes, such as BSP, COL I and OCN.

Effects of Different Concentrations of Tween-80 on Dissolution of Ipriflavone Capsules / 中国药房

OBJECTIVE:To study the effect of tween-80at different concentrations on the dissolution of ipriflavone capsules.METHODS:Different concentrations of tween-80ipriflavone capsules were prepared with contents and dissolutions of ipriflavone capsules determined by UV spectrophotometry,parameter values of T d ,T 50 and m were calculated and compared among each other.RESULTS:When tween-80were at a concentration range of1%～3%,the T 50 and T d diminished with the increase of concentration of tween-80,its optimal concentration was2.5%.CONCLUSION:The dissolution of ipriflavone capsules can be markedly increased if the preparation was added with optimal amount of tween-80(P