Biomedical Research ; Drugs, Chinese Herbal ; therapeutic use ; Eczema ; drug therapy ; Humans ; Integrative Medicine

BACKGROUND: The population of male and female adolescents in China accounts for 1/5. Adolescents have much psychological bewilderment,troublesome and even diseases on sexual issues.OBJECTIVE: To investigate the development status quo and the regulation of adolescents' sexual physiology, sexual psychology, sexual knowledge and sexual education.DESIGN: A cross-sectional survey by employing students of junior high school as subjects.SETTING: A clinic for adolescent of a tertiary hospital.PARTICIPANTS: Totally 960 students aged between 14 and 19 years old of three junior high schools in Dalian city were selected as subjects between November and December of 2001.METHODS: Self-complied questionnaire was used in the survey based on the sexual psychological education situation scale for junior and senior high school students. Classes were randomly selected for anonymous survey based on voluntary principle.Answers to sex-related questions and differences between male and female students.RESULTS: The average age of menarche in female students was 12.96years old and the average age of first emission in male students was 13.89years old, which were consistent with the results of similar national researches. The incidence and frequency of masturbation and sexual impulse was significantly higher in males than females. There were significant differences in sexual concept and the understanding of sexual knowledge between males and females. The desire to affiliate with the opposite sex was far more than the real occurrence.CONCLUSION: The understanding of sexual knowledge in adolescent is not satisfied. Students are also not satisfied with the sexual education provided by their schools. Hence, school sexual education for adolescents should be enhanced with the involvement of community.

Objective To investigate the effect of lower limb rehabilitation training robot combined with task-oriented training on walking ability after stroke. Methods From February 2014 to August 2015,74 consecutive patients with post-stroke who received rehabilitation therapy and met the inclusion criteria admitted to the Department of Rehabilitation Medicine,Xuanwu Hospital,Capital Medical University were collected prospectively. They were all the patients with the first-ever stroke for 1 to 12 months. They were divided into either an observation group (n = 39)or a control group (n = 35)according to whether they were treated with the lower-limb rehabilitation robot. The patients of both groups received task-oriented training,2 times a day,once for 20 min,5 days a week for 12 weeks. The observation group was also treated with the lower-limb rehabilitation training robot,1 time a day,once for 30 min,5 days a week. Berg balance scale,Fugl-Meyer assessment (FMA),timed up-and-go test (TUG)and knee flexion active range of motion (KFAROM)were used to assess the efficacy. Results (1)After treatment,the Berg scale and FMA scale scores were increased in the observation group and the control group compared with before treatment. There was significant difference (Berg scale:28 ±9 vs. 22 ±9,29 ±9 vs. 24 ±9;FMA scores:47 ± 8 vs. 36 ± 8,40 ± 6 vs. 36 ± 7;all P < 0. 01),however,there was no significant difference between the two groups (P <0. 05),and there was significant difference in FMA scores between the 2 groups (P < 0. 01 ). The differences of Berg scale scores in the observation group and the control group were 10. 75 + 0. 30 and 4. 71 + 0. 14 respectively before and after treatment. There was no significant difference between the 2 groups (t = 0. 95,P = 0. 345). The differences of FMA scores in the observation group and the control group were 5. 8 ±0. 6 and 4. 9 ±0. 8 before and after treatment (t =5. 16,P <0. 01). (2)After treatment,the tug test and KFAROM of the observation group and the control group were better than those before treatment. There were significant differences (TUG test:35 ± 13 s vs. 56 ± 18 s,53 ± 17 s vs. 58 ± 18 s;KFAROM:82 ± 24° vs. 60 ± 23°,63 ± 23° vs. 57 ± 26°;all P < 0. 01),and there were significant differences between the 2 groups (all P < 0. 01). The differences of the TUG test in the observation group and the control group before and after treatment were 21. 5 ± 5. 0 and 4. 6 ± 0. 6 s respectively. There was significant difference between the 2 groups (t = 9. 55,P < 0. 01);the differences of KFAROM in the observation group and control group before and after treatment were 5.8 ±0.6° vs. 4.9 ±0.8° respectively. There was significant differences between the 2groups (t =4.17,P <0. .01). Conclusion Lower limb rehabilitation training robot combined with task-oriented training may improve the lower extremity motor function,walking ability,knee flexion joint activity of the patients after stroke,but the improvement effect of the lower limb balance is not obvious.

BACKGROUND: The study of isolation, purification, culture, cell labeling, inducing factors, effects of gene transfection on cytobiology, cell carrier construction, and time window for back transplantation of cell compound pertaining to marrow stromal cells (MSCs) is still in its infancy. OBJECTIVE: To search for an in vitro culture method that can be simply and effectively obtained. DESIGN, TIME AND SETTING: The present cytological in vitro experiment was performed at the Beijing Institute of Genome, Chinese Academy of Sciences between June 2006 and July 2007. MATERIALS: Eight specific pathogen-free New Zealand rabbits, aged 6 weeks, were provided by the Laboratory Animal Center, Institute of Genetics and Development, Chinese Academy of Sciences. METHODS: Under sterile condition, 1 mL rabbit bone marrow was taken and diluted with D-Hanks solution. Following centrifugation and subsequent supernatant removal, bone marrow was re-suspended using dulbecco's modified eagle's medium (DMEM) for single cell suspension. Next, single cell suspension was dropped onto the liquid surface of equal-volume lymphocyte separation medium (density: 1.077). Subsequent to centrifugation, cloudlike mononuclear cell layer was collected and re-suspended with DMEM containing 20% fetal bovine serum. The cells were inoculated at lxl0/cm2 and purified by adherent method. When 70%-80% of flask bottom was covered, cell digestion and passage was performed.MAIN OUTCOME MEASURES: Cell growth was observed with an operating microscope. Surviving cells were counted by Trypan blue viability test. Cell identification was performed by hematoxylin-eosin staining. Through the use of 3-(4, 5-dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide assay, cell viability was detected to observe the cellular resuscitation of the cultured cells following cryopreservation. RESULTS: Twenty-four hours after inoculation, cells began to adhere to the wall, exhibiting short shuttle- or triangle-shaped appearance with different sizes of cellular processes. Three days later, adherent cells began to divide, and cell clusters could be found in some areas; One week later, most of cells exhibited scattered fibroblast-like growth; After passage, cells were evenly distributed with long shuttle-shaped appearance and arranged orderly. Following 3 passages, there wound be 5×106-1×107 adherent cells in 1 mL MSC suspension. Approximately 90% of MSCs survived and identified as mononuclear cells. Cells vigorously grew at days 1-6 after inoculation and reached a peak level at day 8, followed by a viability decline. After 56 days of resuscitation, frozen cells displayed a good and rapid growth. CONCLUSION: Highly purified MSCs can be acquired by gradient centrifugation of lymphocyte separation medium. Enough seeded cells can be obtained by in vitro culture and the cellular viability does not change after frozen preservation and resuscitation.

BACKGROUND: SOX-9 plays an important role in occurrence and development of cartilaginous tissues,enhances agglutination of mesenchymal cells,has structural domains of transcriptional activation,and can directly regulate the transcription,OBJECTIVE: To construct pDC316-SOX-9 plasmid for transfection of rabbit bone marrow stromal cells (BMSCs) using SOX-9 gene,and to investigate the effects of SOX-9 gene on growth characteristics of BMSCs and product expression. DESIGN,TIME AND SETTING: The cell gene engineering in vitro experiment was performe,d at the Beijing Institute of Genome, Chinese Academy of Scienees from June 2006 to January 2007.MATERIALS: Eight SPF New Zealand rabbits aged 6 weeks were used for culture of BMSCs.METHODS: pDC316-SOX-9 plasmid was used for transfection of rabbit BMSCs by liposome mediated method,Cell transfection included a SOX-9 plasmid transfection group,a blank plasmid group and a blank control group (only treatment of liposome). MAIN OUTCOME MEASURES: Cell morphology; growth activity; The SOX-9 protein expression in rabbit BMSCs were detected by immunohistochemistry,hematoxylin-eosin staining,reserve transcriptase-polymcrase chain reaction (RT-PCR) and enzyme-labeled immunosorbent assay (ELISA). RESULTS: Some cell colonies were detected at 4 days after pDC316-SOX-9 plasmid transfection.Spindle-shaped cells were collected after clone amplification.Cells in the blank control group gradually died over time.Cell activities in the SOX-9 plasmid transfeetion group and the blank plasmid group significantly prolonged,reached a peak at 2 weeks of transfection,and then gradually decreased.At 6 days,BMSCs were yellow in the SOX-9 plasmid transfection group following immunohistochemistry,expressing SOX-9 protein.Hematoxyliu-eosin staining showed many dikaryocytes,rich cell proliferation,similar to chondroblasts.No SOX-9 protein expression and unproductive cell proliferation in the blank plasmid group.SOX-9 mRNA was detected in the SOX-9 plasmid transfection group,but SOX-9 mRNA was not detected in the blank plasmid group and blank control group.SOX-9 levels were significantly higher in the SOX-9 plasmid transfection group than in the blank plasmid group and blank control group at 24,48 and 72 hours,1,2 weeks (P＜ 0.01).CONCLUSION: Rabbit BMSCs were successfully transfected with pDC316-SOX-9 plasmid to enhance cell growth activity and to persistently stably secrete SOX-9 protein,resulting in the differentiation of BMSCs into cartilages.

Objective To evaluate therapeutic effects of Bushen-Zhuanggu medicine extraction on bone destruction in rats bone cancer pain.Methods Rat models of cancer-induced bone pain were established by inoculating MRMT-1 cells into tibia of rats.Behavioral signs indicative of pain including 50%paw withdrawal threshold(von Frey tactile sensitivity test)and thermal withdrawal latency were observed.Pathomorphological changes of tibia were monitored with HE staining.Results In the behavioral tests,herbal medicine treatment attenuated mechanical allodynia and thermal hyperalgesia.Histological examination showed that this treatment inhibited tumor proliferation and preserved the cortical and trabccular bone structure.Conclusion Bushen-Zhuanggu medicine extraction is an anti-nociceptive and bone-preserving agent in rats of bone cancer pain.

Humans ; Occupational Diseases ; diagnosis

Objective To establish a digital segmentational data set of larynx based on Chinese visible human (CVH). Methods Magnetic lasso and polygon tools of Photoshop were used to segment the small organs and structures of larynx of CVH to establish the segmentational data set of larynx. After conversion of the image format, the segmentational structures were extracted automatically with Thresholding Method and presented 3-D visualized, and then were checked up by its result of 3D reconstruction with Amira 4.1 software. Results Many small structures of larynx were segmentated, such as laryngeal cartilage, laryngeal muscles, vocal cords and so on. Then the segmentational data set of larynx based on CVH was established, which can be used to 3-D reconstruction accurately. Conclusion The segmentational data set of larynx is accurate and integrated, which is helpful to establish the elaborate model of larynx and can provide the method of color image segmentation.

Objective To dynamically observe the changes of the plasma superoxide dismutase(SOD) activity and malondialde-hyde(MDA) content of rabbits with hemorrhagic shock in high latitude .Methods 28 rabbits were randomly divided into 4 groups :0 .9% NaCl group ,7 .5% NaCl group ,Voluven(6% HES 130/0 .4) group and control group .The plasma SOD activity and MDA content were measured before shock .At 30 minutes of shock and 30 minutes later of volumetric resuscitation .Then the changes of MAP were observed .Results There were no static difference among 4 groups in the levels of SOD and MDA before shock ;at 30 minutes of shock ,the SOD activity was reduced signicantly and the MDA content was increased in each group (P<0 .01) .Afer fluid infusion there were no obvious change in the plasma levels of SOD and MDA compared with those of shock in 0 .9% NaCl group and in 7 .5% NaCl group(P>0 .05) ,whereas in Voluven group ,compared with those in 0 .9% NaCl and 7 .5% NaCl group the SOD activity was elevated signicantly and the MDA content was decreased (P<0 .01) .Conclusion Voluven can be used in scan-venging oxygen free redicals by recovering the plasma SOD activity in rabbits with hemorrhagic shock in high latitude .

Objective To discuss the application value of 18F-FDG PET/CT in diagnosis of colorectal cancer. Methods We retrospectively analyzed the data of 186 patients who were diagnosed as colorectal cancer by 18F-FDG PET/CT. We classifed all cases according PET/CT imaging into position group and type group,and calculated SUV (maximum standard uptake value) of tumor tissue, and compared with normal tissue. Results There were 112 cases of rectal cancer,27 cases of carcinoma of sigmoid, 17 cases of carcinoma of cecum,16 cases of ascending colon carcinoma,14 cases of carcinoma of descending colon according to positions via PET/CT. There were 68 cases of protrude type,57 cases of ulcerative type,34 cases of infiltrating type,27 cases of colloid adenoma according types via PET/CT. The SUV of tumor tissue was higher than normal value,the difference had statistical significance. Conclusion 18F-FDG PET/CT has high application value in colorectal cancer diagnosis, positions and types.