Bone marrow mesenchymal stem cells (BMSCs) are a group of pluripotential non-hematopoietic somatic stem cells niched in bone marrow.With the characteristics of stable genetic traits,pluripotential in differentiation,easy to isolate from source tissue,and fast to proliferate when cultured in vitro,BMSCs are currently attracting extensive research interests,and considered to be one of the most promising candidates in corneal tissue engineering.At present,many research groups,domestic and abroad,have reported that BMSCs can not only differentiate into corneal limbal stem cells,corneal epithelial cells,and corneal endothelial cells,but also play an important role in ocular surface repair.However,the successful application of BMSCs in cornea usually depends on the correct selection of supporting materials or scaffold,such as xenogeneic corneal stroma and amniotic membrane.Other unsolved problems in BMSCs-related corneal tissue engineering include the molecular biologic mechanism underlying the directional differentiation from BMSCs to corneal cells,the standards to identify BMSCs from differentiated corneal cells,the optimal scaffold materials and the potential tumorigenicity with grafting of transformed or undifferentiated BMSCs.This paper reviewed the progresses and issues of corneal tissue engineering with BMSCs.

Antineoplastic Agents ; therapeutic use ; Arsenicals ; therapeutic use ; Humans ; Myelodysplastic Syndromes ; drug therapy ; Oxides ; therapeutic use

Cardiovascular Diseases ; Follistatin-Related Proteins ; physiology ; Humans

American Medical Association ; Humans ; Lymphoma, Mantle-Cell ; therapy ; United States

Bone Demineralization, Pathologic ; prevention & control ; Dental Caries ; prevention & control ; therapy ; Dental Restoration, Permanent ; Education, Dental ; Gingivitis ; prevention & control ; Humans ; Orthodontics, Corrective ; Preventive Dentistry ; education

Aged ; Female ; Foreign Bodies ; pathology ; Humans ; Laryngeal Diseases ; Larynx ; pathology ; Vestibule, Labyrinth

Acute Disease ; Bone Marrow Neoplasms ; pathology ; Hematologic Neoplasms ; pathology ; Humans ; Immunohistochemistry ; In Situ Hybridization, Fluorescence ; Leukemia ; pathology ; Lymphoma ; pathology ; Myelodysplastic Syndromes ; pathology ; Neoplasm Invasiveness ; Plastic Embedding ; Purpura, Thrombocytopenic, Idiopathic ; pathology

Metallic cancellous screw is one of the fixation devices widely used for bone fractures. It has always been reported that many cases of internal fixation failed just because of screw loosening or pullout. The stability of fixation is associated with the pullout strength of screws. The pullout strength strongly depends on the geometrical design of the screw thread, the material and the insertion technique of the screw, and the bone mineral density of the insertion site of the screw.

Objective To investigate the expression of regeneration gene protein-2(Reg-2) after the transection injury in rat spinal cord. Methods Forty five SD rats were randomly divided into two groups: in the injury group,the SCI was produced by complete transection of the cord at the 9(th) thoracic level,and the sham operation rats were taken as the normal control.The animals were perfused at 1h,1d,3d,7d,14d after the operation,and the spinal cord was taken out at different time points.The expressions of Reg-2 were tested by immunohistochemical analysis and Western blotting,the double staining of Reg-2 and different neural cells special markers(GFAP,Olig2,NPY,CGRP,GAP-43,et al)was done with immunofluorescence method. Results The expression of Reg-2 was found at 1h after the spinal cord injury,reached the peak on day 3 after the injury in the neurons of dorsal horn and day 7 in the neurons of ventral horn.The high expression persisted for 1 week,then decreased gradually.Conclusion Reg-2 may work as an important growth factor and participate in the regeneration and rehabilitation process after the spinal cord injury.

Adult ; Broad Ligament ; Diagnosis, Differential ; Female ; Genital Neoplasms, Female ; diagnosis ; Humans ; Leiomyoma ; diagnosis ; Neoplasms, Multiple Primary ; diagnosis ; Ovarian Neoplasms ; diagnosis ; Teratoma ; diagnosis ; Uterine Neoplasms ; diagnosis