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During the development of dental germ, enamel matrix proteins secreted by epithelial root sheath could induce dental follicle cells to differentiate towards cementoblast and form acellular cementum finally on the surface of tooth root. Many researches of domestic and oversea scholars suggest that enamel matrix proteins could effectively induce periodontal regeneration, and the structure and function of this regenerated tissue are similar to healthy periodontal tissue. Moreover, the regeneration process is nearly the same to that of embryonic development of periodontal tissue.

自发现釉基质蛋白可诱使牙囊细胞向成牙骨质细胞方向分化并在根表面形成无细胞性牙骨质以来，国内外学者做了大量研究，结果表明釉基质蛋白能有效诱导牙周组织的再生，且这种再生组织的结构和功能更接近于健康的牙周组织，并且再生过程也与牙周组织的胚胎发育过程类似。

Methods Monocytes in peripheral blood were obtained from 12 patients with acute myocardial infarction, 16 unstable angina pectoris, 12 stable angina pectoris and 8 normals by ficoll density gradient centrifugalization. The cells were incubated for 48 hours to induce them to differentiate into macrophages by adding phorbolester 12-myristate 13-acetate. The levels of MMP-9 and TF in the supernatant were measured by ELISA.

密度梯度离心法提取12名急性心肌梗死、16名不稳定心绞痛、12名稳定型心绞痛患者和8名冠脉正常者的单核细胞，用佛波酯诱导其分化为巨噬细胞，ELISA法测定单核源巨噬细胞上清液MMP-9、TF含量。

The established method, with higher specificity and reproducibility, could accurately differentiate genuine antler from its adulterants and would be widely used in Cervus related Chinese crude drugs′ identification.

所建立的位点特异性PCR方法，能将正品鹿茸与其他近源种鹿茸药材鉴别开来，具有较高的特异性、重复性，可广泛应用于鹿类药材的鉴别。

The established method, with higher specificity and reproducibility, could accurately differentiate genuine antler from its adulterants and would widely used in Cervus related Chinese crude drugs' identification.

所建立的位点特异性PCR方法，能将正品鹿茸与其它近源种鹿茸药材鉴别开来，具有较高的特异性、重复性，可广泛应用于鹿类药材的鉴别。

In addition, LQ of neural stem cells can be induced in vitro to differentiate into cholinergic neurons.

另外，LQ可以诱导神经干细胞体外定向分化为胆碱能神经元。

Objective To explore whether mesenchymal stem cells could be isolated from human umbilical cord blood and would be able to differentiate into chondroblast in vitro.

目的：探讨人脐带血间充质干细胞存在及体外向成软骨细胞分化的可能性。

Bone induction is an important theory in the early 20th century. Urist found that bone morphogenetic protein could promote mesenchymal cell to differentiate into osteoprogenitors and chondroblast in 1965, thence many scholars went in for the significant work in this research field.

诱导成骨是近代发展的重要理论，Urist首先提出间充质细胞在骨形态发生蛋白的作用下可向成骨和成软骨方向分化，此后国内外很多学者在该领域进行了广泛深入的探索。

Objective: To examine the property and proliferation ability of primary culturing MSC, investgate the effect of lightly centrifugation and chemical definition medium to induce MSC differentiate into chondroblast.

目的：了解骨髓基质干细胞原代培养的特性及增殖能力，探讨轻度离心和化学限定培养基法诱导骨髓基质干细胞向成软骨方向分化的作用；为软骨组织工程提供足量、合适的种子细胞。

Autologous MSC can be obtained easily, their source in human are plenty, own active proliferation and potential to difference into chondroblast. Now MSC become the chief seed-cell in cartilage tissue engineer, but the technology to stimulate MSC differentiate into chondroblast is not very successful, the standard technology is culture the cell-ball in centrifuge tube, the reconstructured cartilage-like tissue is not achieve the mechanics of hyaline cartilage.

自体骨髓基质干细胞来源丰富，取材容易，具有旺盛的增殖能力及向成软骨细胞分化的潜能，已成为软骨组织工程的首选种子细胞，但MSC诱导分化为成软骨细胞且应用于软骨组织工程的技术尚不十分完善，目前主要采用的技术为细胞团块离心管培养，其构建的软骨组织在力学性能上很难达到关节软骨的要求。

Autologous MSC can be obtained easily,their source in human are plenty , own active proliferationand potential to difference into chondroblast. Now MSC become the chief seed-cell in cartilage tissue engineer , but the technology to stimulate MSC differentiate into chondroblast is not very successful,,the standard technology is culture the cell-ball in centrifuge tube,the reconstructured cartilage-like tissue is not achieve the mechanics of hyaline cartilage.

自体骨髓基质干细胞来源丰富，取材容易，具有旺盛的增殖能力及向成软骨细胞分化的潜能，已成为软骨组织工程的首选种子细胞，但MSC诱导分化为成软骨细胞且应用于软骨组织工程的技术尚不十分完善，目前主要采用的技术为细胞团块离心管培养，其构建的软骨组织在力学性能上很难达到关节软骨的要求。

I had a lovely dog named PiPi, he was one of my best friends.

我曾经有过一只小狗，它的名字叫皮皮，它很善良，它是我最忠实的朋友。

Newly ovulated mouse oocytes were cultured in the CZB medium supplemented with different concentrations of pyruvate before treated for activation or assayed for MPF activity.

我们猜测卵母细胞在不含丙酮酸的条件下老化的更快，并且卵丘细胞可能通过消耗不含葡萄糖的CZB中的丙酮酸从而促进卵母细胞老化。