软骨内成骨的调控

骨骼的纵向生长不仅需要激素的调节，同时也需要旁分泌的局部调节因子的调节，因而调节因子可分为系统性调节因子和局部调节因子。系统性调节因子包括生长激素、甲状腺素、雌激素、雄激素、维生素D3、视黄酸及皮质激素等。局部调节因子包括骨形态发生蛋白（BMPs）、成纤维细胞生长因子（FGFs）、Ihh／甲状旁腺素相关肽（PTHrP）及类视黄醇等，它们与核内转录因子相互作用，调节与控制软骨内成骨的进程。现对近年来软骨内成骨的主要调节因子研究综述如下。     

BIOEQUIVALENCE BETWEEN rhGH FOR RECONSTITUTION AND READY-TO-USE rhGH IN TWO LIQUID FORMULATIONS

Objective To evaluate the bioequivalence between recombinant human growth hormone （rhGH） for reconstitution, and two dosages of liquid formulation of rhGH [ （151U） 5mg or （301U） lOmg per 3ml ]. Methods The study drugs were tested in a randomized, single-blind and three-period crossover studies in 24 healthy male subjects. The three drugs were administered by subcutaneous injection at a dose of O. 21U/kg body weight. A continuous somatostatin infusion was given in order to suppress the secretion of endogenous GH. The ve- nous blood samples were drawn at different time points to test the serum concentration of GH. The pharmacokinetic parameters were analyzed by statistical methods. Results 90% confidence intervals （CI） of AUC0-24h among three products were all within 80% - 125% interval （ 103. 4% - 116. 5%, 105. 7% - 119. 6% and 91.9% - 103. 7%, respectively）, and the Cls of C,~ among three products were all within 70% - 143% interval （91.9% - 114. 0%, 103. 7% -127. 2% and 81.6% -97. 4%, respectively）. There was no statisitical difference of tmax among all the three products. Conclusion These data demonstrate that there is bioequivalence between rhGH for reconstitution and two liquid formulations of rhGH.     

牙周组织病

bFGF和rhBMP对牙周膜细胞胶原酶水平的影响，龈上牙结石附着面和游离面晶体构型的扫描电镜观察，米诺环素对人牙周韧带绷胞矿化能力的影响，米诺环素软膏局部治疗慢性牙周炎的峰床疗效[编者按]