BACKGROUND:Lung cancer stem cel s are tightly related to the treatment and prognosis of lung cancer. We can provide more references for clinical diagnosis and treatment of lung cancer through the study on the tumorigenicity and surface markers of lung cancer stem cel s. OBJECTIVE:To explore the enrichment methods for lung cancer stem cel s and cel ular tumorigenicity. METHODS:Lung cancer stem cel s were induced in serum-free culture medium containing epidermal growth factor, insulin-like growth factor 1, and basic fibroblast growth factor. Then, the expressions of related surface markers were detected using immunofluorescence method. After that, mice were implanted subcutaneous with lung cancer stem cel spheres to understand the tumorigenicity of lung cancer stem cel s. RESULTS AND CONCLUSION:Lung cancer stem cel s under serum-free induction and culture were changed to sphere-forming cel s, and the immunofluorescence detection showed that over 80%of sphere-forming cel s were positive for CCSP, SP-C and OCT4. After transplantation of sphere-forming cel s, the mice showed a high tumorigenicity. These findings indicate that sphere-forming cel s are formed after serum-free suspension culture of lung cancer stem cel s, which have a higher tumorigenicity.

Evidence-Based Practice ; Humans ; Practice Guidelines as Topic

Evidence-Based Medicine ; Evidence-Based Practice ; Humans ; Practice Guidelines as Topic

Evidence-Based Practice ; Practice Guidelines as Topic

Heart Valve Prosthesis Implantation ; Humans ; Tricuspid Valve Insufficiency ; diagnosis ; etiology ; therapy

Child ; Humans ; Vesico-Ureteral Reflux ; therapy

Coronary Disease ; complications ; Erdheim-Chester Disease ; complications ; Humans ; Male ; Middle Aged

Adrenal Gland Neoplasms ; Adult ; Humans ; Male ; Pheochromocytoma ; Rupture, Spontaneous

BACKGROUND: Bone implant materials have been previously reported to be not coincident between inducing velocity of new bone formation and degradation velocity itself; therefore, the materials could not be completely degraded but formed into foreign substances. A novel artificial bone implant material, characterizing by well biocompatibUity, biodegradation, and biomechanics, is focused in biomaterials field recently.OBJECTIVE: To study the biodegredation of a novel bionic scaffold with nanostructure, i.e., poly (3-hydroxybutyrate-co-3-hydroxyvalerata)/sol gel bioactive glass (PHBV/SGBG), in vivo. DESIGN, TIME AND SETTING: A controlled animal experiment was performed at Animal Experimental Center of the Third Hospital affiliated to Sun Yat-sen University from May 2005 to October 2006. MATERIALS: PHBV/SGBG was provided by Materials Institute of South China University of Technology, and ethylene oxide was sterilized for preparation.METHODS: Eight hybrid dogs were used to make models of Ubia diaphyseal defect, having two defects on both left and right sides. The tibia diaphyseal defects at proximal part were considered as the control group, and those were not performed with any treatment; while, the tibia diaphyseal defects at distal part were considered as the experimental group, and PHBV/SGBG was fully implanted into the defect regions. Every two dogs were sacrificed at different time points of 2, 4, 8, and 12 weeks, respectively. MAIN OUTCOME MEASURES: In vivo biodogradation and osteogenesis were monitored under optic microscopy and electron microscope.RESULTS: The PHBV/SGBG scaffold had well biodegradation and rapid degradation velocity, and it began to degrade at two weeks after operation. The PHBV/SGBG scaffold was almost replaced by new bone tissues at 8 weeks after operation and completely degraded at 12 weeks after operation. In addition, the PHBV/SGBG scaffold had a good ability to induce new bone formation from edge to center. Whereas, surface depression in the defect region was still visible in the control group, cortical bone was not formed in embedded region of soft tissue; furthermore, electron microscopy demonstrated that calcium salt deposition was increased in the bone defect region, and the structure was tight; however, the defect was not completely repaired, and some voids were still visualized.CONCLUSION: The novel bionic scaffold, PHBV/SGBG, degrades fast in vivo to generate new bone tissues. The new bone regenerate accompanied by a fitting degradation of the novel bionic scaffold that achieve complete repair.

BACKGROUND:There is little attention focused on the effect of isokinetic testing about the variation of angular velocity on pain and muscle strength in the evaluation of curative effect of McConnel taping. OBJECTIVE: To evaluate the changes of quadriceps muscle strength and perceived pain levels in patients with patelofemoral pain syndrome before and after corrective McConnel taping in isokinetic testing. METHODS:A total of 34 patients with patelofemoral pain syndrome were evaluated in isokinetic testing for concentric contraction muscular strength, including the maximum torque, the total work, and the average work in 60 (°)/s and 180 (°)/s angular velocity, before and after the interventions of McConnel taping. The visual analogue scale scores were recorded. RESULTS AND CONCLUSION: The visual analogue scale scores were slightly decreased in angular velocity of 60 (°)/s after obturation when compared to before obturation (P > 0.05), while the scores were significantly decreased in angular velocity of 180 (°)/s (P < 0.05). The maximum torque, the total work, and the average work were slightly increased after obturation, but showed no significant difference in angular velocity of 60 (°)/s (P > 0.05), while significantly increased in 180 (°)/s angular velocity (P < 0.05). McConnel taping significantly improves the curative effect in patients with patelofemoral pain syndrome under low load joint movement.