BACKGROUND: Previous research has indicated that bone marrow-derived mesenchymal stem cells had immunological regulation and hematopoiesis role. There were significant differences in immunological regulation and hemopoietic function between patients with aplastic anemia and normal cases. OBJECTIVE: To summarize the in vitro biological characteristics and its immune regulation defects of bone marrow-derived mesenchymal stem cells from patients with aplastic anemia.METHODS: A computer-based online search was conducted in PUMMED (1987-2009) and VIP database (1989-2009) with the key words of "mesenchymal stem cell, bone marrow" in both Chinese and English. There were 55 articles in total. Articles which were related to biological characteristics and its immune regulation defects of bone marrow-derived mesenchymal stem cells were included; however, duplicated articles were excluded. Finally, 32 articles were included, containing 3 reviews in English, 23 original articles in English, and 6 original articles in Chinese. RESULTS AND CONCLUSION: Bone marrow-derived mesenchymal stem cells had the capacities of high proliferation, self-renewal and multilineage differentiation; in addition they had the roles of supporting hematopoiesis, promoting implantation and hematopoietic reconstitution in vivo. Bone marrow-derived mesenchymal stem cells still had the effects of negative immune regulation and reducing the incidence of graft-versus-host disease (GVHD). Aplastic anemia correlated with hematopoietic stem cells in the pathogenesis of intrinsic defects in the proliferation or differentiation of hematopoietic microenvironment and immune system abnormalities and other related disorders. Bone marrow-derived mesenchymal stem cells of patients with aplastic anemia played an important role in the pathogenesis of this disease.

Objective To analyse status of peripheral blood leukemic cells detected by flow cytometry in patients with acute leu‐kemia(AL) ,and to provide references for evaluating clinical efficacy and prognosis of AL .Methods The peripheral blood specimens of 87 cases of patients with AL ,including 53 cases of patients with acute myelocytic leukemia and 34 cases of patients with acute lymphoblastic leukemia ,were detected by using flow cytometry ,morphological changes in bone marrow cells were detected ,as well . Results The sensitivity ,specificity and positive predictive value in determination of acute myelocytic leukemia was 95 .6% ,34 .5%and 81 .3% respectively ,and those in acute lymphoblastic leukemia was 87 .3% ,45 .6% and 68 .9% respectively ,statistically signif‐icant differences were found in sensitivity ,specificity and positive predictive value (P<0 .05) .A total of 19 cases with negative mini‐mal residual disease had recurrence(26 .31% ) after 24 months ,and 68 cases with positive minimal residual disease had recurrence (86 .76% ) after 24 months ,and the recurrence rate between the two groups was statistically significant (P<0 .05) .Among all pa‐tients with positive minimal residual disease ,the recurrence rate in patients with high expression level of minimal residual disease (88 .23% ) was higher than that in patients with low expression level of minimal residual disease (47 .09% ) ,and the difference was statistically significant (P<0 .05) .Conclusion Flow cytometric analysis of peripheral blood leukemic cells may has significance for diagnosing relapse of AL and guiding clinical medication .

The Contents of EPA and DHA were enriched from fish oil by lower temperature crystallization. After first separation,the concentration of EPA and DHA went up to 50%-58% from 7%-15%,and to 73%-79%after sencond separation. The selection of solvents and conditions of crystallization were discussed.

Objective To investigate the diagnostic value of CT-guided percutaneous biopsy of peritoneum for unknown ascites.Methods The clinical data of 106 cases of unknown peritoneum in our hospital were collected retrospectively over the past five years (May 23,2011 to August 2,2016).The sensitivity and specificity of the percutaneous biopsy of peritoneum in diagnosis of the patients with unknown etiological ascites were evaluated.Complications were collected to evaluate the safety.Results The 106 patients with unknown ascites were performed with CT-guided percutaneous biopsy of peritoneum.The diagnoses of 91 patients were confirmed pathologically,accounted for 85.85％ of the total.Among the 91 patients,there were 60 cases (56.60％) of malignant and 31 cases (29.25％) of benign.The other 15 patients had no clinical diagnosis,which accounted for 14.15％ of the total.The diagnostic sensitivity and specificity was 88.35％ and 100％ respectively,which were significantly superior to cytological examination,biochemical markers and other routine analysis.No severe complications were observed in all patients.Conclusion CT-guided percutaneous biopsy of peritoneum for unknown ascites plays an important instructive role in diagnosis with high accuracy,and it is a safe and effective method.

BACKGROUND: The problem of the high rate of acute restenosis at an early and advanced stage has been a hot spot, while the stent with paclitaxel (poly-L-lactide, PLLA/polyglycolic acid, PGA) degradable material will resolve it. OBJECTIVE: To seek an ideal biologic degradable material used in biologic degradable stent. DESIGN, TIME AND SETTING: The comparative cytological study was performed at the Laboratory of Toxicology, Institute of Public Health, Jilin University (Key Laboratory of Radiobiology of Ministry of Public Health of China, Key Laboratory of Toxicology of Jilin Province) from July 2003 to July 2005. MATERIALS: Paclitaxel degradable material (PLLA/PGA) (PLLA:PGA= 9: l ) were offered by Changchun Applied Chemistry Institute of Chinese Academy of Science). Human umbilical arterial smooth muscle cells (SMCs) were purchased from Boster, Wuhan, China. METHODS: The sixth passage of SMCs were digested by 0.25% Trypsin under ambient temperature for 3 minutes, incubated in 10 mL 10% ox serum BMEM, and made into SMC suspension. The materials kept in hypothermal disinfectant Co60 were heated to 37 ℃ by waterbath after surface treatment, and then placed in a 6-well culture plate. SMC suspension was added into the middle of the materials. The density of cells was about 5×106/cm2. Cell suspension diffused around the materials gradually. At last, 10% ox serum BMEM culture solution was added into it, and cultivated in a 5% CO2 incubator at 37 ℃. The growth of cells in and surrounding the materials was observed by inverted microscope everyday. MAIN OUCOME MEASURES: The materials were obtained after culture for 3, 6, 12, 19, 26, 34 days and vacuum dehydration, and were weighed. The weight loss of materials was compared before and after culture. The average degradable rate of materials was calculated.RESULTS: Degradable material had no influence on the development of SMCs. The average degradation rate ex vivo was 0.45% per day. CONCLUSION: PLLA/PGA with good cellular compatibility could be applied to intravascular stents.

Aim The protective effect and mechanism of TPG on PC12 cells in calcium overloading injury models were studied. Methods Two injury models induced by KCl and NMDA were used to assay the action of TPG in cultured PC12 cells. Results The morphological examination revealed that TPG possessed obvious protective effects on PC12 cells in injury models. MTT and LDH measurement indicated that TPG increased the number of live cells and reduced the extent of cell injury significantly. TPG also lessened the concentration of calcium ion in cytoplasm. Conclusion TPG protected rat PC12 cells against two calcium overloading injuries effectively in vitro. Its actions may deal with anti oxidation, inhibition of NO production and blocking of both types of calcium channel.

BACKGROUND: Thermosensitive hydrogel materials present stability at human body temperature, which is necessary for its application as a medical implant, thus the lower critical solution temperature (LCST) of thermosensitive hydrogel should be beyond the human body temperature by adjustment.OBJECTIVE: To prepare a thermosensitive hydrogel poly-N-isopropylacrylamide-co-N-hydroxymethylacrylamide P(NIPAAm-co-NHMPA) with over 37 ℃ LCST, and primarily appraise its safety as a medical implant in vivo.DESIGN: Random, non-blind, group control, animal experimental study.SETTING: Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science & Technology(HUST).MATERIALS: The experiments were carried out in the Central Laboratory, Union Hospital, Tongji Medical College, HUST and the Key Laboratory of Biomedical Polymer Materials of the Ministry of Education, College of Chemistry, Wuhan University between January and October in 2007. NIPAAm monomer and NHMPA monomer were purchased from Aldrich Company, crosslinking agent N, N'-methylene bisacrylamide from Fluka Company, and initiator ammonium persulfate and accelerating agent tetramethyl ethylene diamine from Sigma Company.METHODS: ①Taking ammonium persulfate and tetramethyl ethylene diamine as oxidation-reduction initiation system, while N, N'-methylene bisacrylamide as cross-linking agent, P-NIPAAm-co-NHMPA was prepared with the addition of NHMPA in the reaction system. LCST was determined by shrinking tests.②A series of biocompatibility tests such as sensitization test, acute systemic toxicity test, genetic toxicity test and implantation test were conducted in several experimental animals to evaluate the safety of the implant. MAIN OUTCOME MEASURES: The erythema and edema of stimulated lesions were recorded in sensitization test; the general state of each animal in acute systemic toxicity test were recorded 4, 24, 48 and 72 hours after injection; in genetic toxicity test, mouse bone marrow polychromatic erythrocyte (PEC) micronucleus was counted six hours after injection under microscope; sections after implantation were observed under light microscope.RESULTS: ①Synthesized hydrogel showed thermosensitive character and the LCST was 38 ℃.②In sensitization test, there was no erythema and edema occurred after leaching liquor and saline were injected; acute systemic toxicity test result revealed no symptom of toxicity; the genetic toxicity test suggested no difference of PEC frequency between experimental group and negative control group; in vivo implantation test, the inflammation around the material was mild and limited.CONCLUSION:P(NIPAAm-co-NHMPA) shows good biocompatibility and can be potentially used as an implant material.

Child ; Diagnosis, Differential ; Diagnostic Errors ; Female ; Humans ; Porphyria, Acute Intermittent ; diagnosis ; therapy

BACKGROUND: To eliminate effectively and promptly sports fatigue and prevent excessive fatigue that are associate with the effects of training, improvement of sports results and health of athletes directly.OBJECTIVE:To explore the effects of acupoint iontophoresis on eliminating sports fatigue.DESIGN: Randomized controlled experiment was designed, in which, the athletes were taken as the objects.SETTING: Research and Teaching Room of Sport Medicine of Wuhan In stitute of Physical Education and College of Acupuncture and Massage of Shanghai University of Traditional Chinese Medicine.PARTICIPANTS:The experiment was performed in Wuhan Institute of Physical Education from June 2002 to June 2003. Totally 32 male athletes were selected as the objects,with similar level in training of kayak in Wuhan Institute of Physical Education. They were randomized into 5groups, named training group, training+ acupoint-dermal electric stimulation (dermal electric group), training + oral herbal administration (Chinese herb group), training + acupoint iontophoresis group (iontophoresis group)and training + Chinese herb + iontophoresis group(Chinese herb + iontophoresis group).There were 4 persons in the training control and 7 persons in the rest groups.METHODS:The experiment was performed in the training stage of large sports load in summer. The training methods were same in each group, totally for 8 weeks. ① Training group was taken as the control. ② In dermal electric group,after training,dermal electric stimulation was applied on shanzhong (CV 17), xinshu (BL 15), baihui (GV 20) and mingmen (GV 4).③ In Chinese herb group, after training, self-prepared shenwensan was applied for oral administration as decoction. ④ In iontophoresis group, after training, iontophoresis was used. ⑤ In Chinese herb + iontophoresis group,both self-prepared shenwensan and iontophoresis were applied.Trace observation of heart and lung functions were performed with subjective physical sensation scoring (before, after and on the 4th week of experiment), test of sports results,test of heart and lung functions and radioimmunoassay(RIA) (before and after experiment) in athletes.MAIN OUTCOME MEASURES: Subjective physical sensation scoring,test of sports results,test of heart and lung functions and determination of levels of endothelin (ET) and calcitoningene-related peptide (CGRP).RESULTS:The athletes in all of groups accomplished the training and tests of every index and the results had all entered final analysis.① Subjective sensation of athletes was all improved obviously and the effect of iontophoresis was improved significantly compared with dermal electric group and Chinese herb group (P ＜ 0.05). ② The results of rowing projects were improved to different extents in each group.The improved amplitude of 12 km training in every treating group was different significantly compared with training group (P ＜ 0.05). The result of 2 km training was improved most significantly in Chinese herb + iontophoresis group (P ＜ 0.05).③ VO2max was increased in Chinese herb group,iontophoresis group and Chinese herb + iontophoresis group to different extents. Maximal respiratory quotient (Rqmax)was in tendency of increasing in every group after experiment, HR-AT was all in tendency of decreasing and it was decreased in large amplitude in Chinese herb + iontophoresis group (P ＜ 0.05). The time of exhaustive sports was prolonged in all of groups,but the effect was the most obvious in iontophoresis group. ④ Endothelin (ET) was in tendency of increasing after experiment in each group, but the increasing amplitude was the largest in training group.The calcitoningene-relatedpeptide (CGRP) was in tendency of increasing in every group, but CGRP was increased with the best result in Chinese herb + iontophoresis group and that was with the least result in training group. The difference was no significant in comparisons among groups and before and after experiment(P ＞ 0.05).It was indicated that the training load of athletes had not reach the fatigue limitation.CONCLUSION:Cardiac sports fatigue is relevant to multiple factors.Acupoint iontophoresis can protect myocardium in multiple links and layers, improve cardiac function, reduce HR-AT, increase oxygenic endurance and promote the secretion of nervous peptide ET and CGRP; retard fatigue and promote fatigue elimination so as to delay cardiac sports fatigue.

AIM: To prepare and evaluate the biocompatibility of a thermosensitive hydrogel poly-(N-isopropylacrylamide-co-N-hydroxymethylacrylamide) (P-NIPAAm-co-NHMPA) in vivo so as to appraise its safety as a medical implant in clinical use. METHODS: The experiments were carried out in the Central Laboratory, Union Hospital, Tongji Medical College, Huazhong University of Science & Technology(HUST) and the Key Laboratory of Biomedical Polymer Materials, Ministry of Education, College of Chemistry, Wuhan University between January and October in 2007. ① Preparation of thermosensitive hydrogel P-NIPAAm-co-NHMPA: Taking ammonium persulfate and tetramethyl ethylene diamine as oxidation-reduction initiation system, while N, N'-methylene bisacrylamide as cross-linking agent, P-NIPAAm-co-NHMPA was prepared with the addition of NHMPA in reaction system. Low critical solution temperature was determined by shrinking tests. ②A series of biocompatibility tests such as sensitization test, acute systemic toxicity test, genetic toxicity test and implantation test were conducted to evaluate the safety of the implant. RESULTS: ①Synthesized hydrogel showed thermosensitive character as expected, and the low critical solution temperature was 38 ℃.②In sensitization test, there was no sensitization proved in the material; in acute systemic toxicity test, the symptom of toxicity was not found; the genetic toxicity test suggested no teratogenic or mutagenic effects; in vivo implantation test showed that the inflammation around the material was mild and limited. CONCLUSION: Thermosensitive hydrogel P-NIPAAm-co-NHMPA has good biocompatibility and is a potential medical implant.