In recent years, with the discovery of neural stem cells in the adult nervous system, as well as the continuous research of stem cells, the applications of stem cells in the treatment of ischemic stroke have drawn a broad attention of academicians.A great number of experimental studies have shown that stem cells can improve the post-stroke neurological function to some extent.This indicate a good prospect for clinical application.At present, researches related to the treatment of ischemic stroke with stem cells concentrate mainly on two ways.The first is to treat ischemic stroke through the activating of endogenous neural stem cells, and the second is to treat ischemic stroke through the transplantation of exogenous neural stem cells.This study is designed to review the present research status of the application of various stem cells for the treatment of ischemic stroke in animals and clinical studies, and to analyze existing problems and uncertainties.

Objective To evaluate the curative effect of hysteromyoma uterine treated by uterine artery embolization (UAE) with color Doppler ultrasound.Methods Seventeen patients with hysteromyoma uterine were examined by color Doppler ultrasound before and after uterine artery embolization wthin half year monthly,observing the size, morphology,internal echotexture and Doppler signal of the uter and its myoma,measuring their Doppler indices of uterine artery,peripheral and internal vascular in myoma.Results There was significant difference of the average volume of the uterus and its myoma between pre-operation and post-operation( 435.18 cm 3 vs 222.51 cm 3, 102.47 cm 3 vs 52.10 cm 3,respectively, P

BACKGROUND: Up to now, no universally successful therapy to treat substantial articular cartilage defects has been available. Numerous therapeutic approaches can only improve clinical symptoms of joint lesions, but not stimulate the regenerative and reactive capacity of the biological tissue in the defect, and not restore an articular surface capable of functional load bearing.OBJECTIVE: To investigate the curative effects of homograft of mesenchymal stem cells (MSCs) seeded onto cancellous demineralized bone matrix (DBM) on articular cartilage defects.DESIGN, TIME AND SETTING: A randomized controlled study which conducted in Orthopaedics Institute, the Second Hospital of Lanzhou University from January to March 2005 and Central Laboratory of Guilin Medical Collage from May to August 2008.MATERIALS: Bone metaphysis and vertebral cancellous bone were derived from rabbits to prepare DBM materials. MSCs were seed on DBM stent and cultured in vitro. All 36 rabbits were randomly divided into combination group (DBM/MSCs), DBM alone group, and blank control group, with 12 rabbits per group.METHODS: Full-thickness cartilage defect model of knee joint was frilled using a cylinder of 4 mm diameter and 3 mm thickness on intercondylar fossa. The cartilage defects in the intercondylar fossa were filled with MSCs/DBM in combination group A, with only DBM in the DBM group, and nothing was treated in the blank control group.MAIN OUTCOME MEASURES: Four rabbits were killed at three time points, which were 4, 8 and 12 weeks after the operation in each group, and the reparative tissue samples were evaluated grossly, histologically, immunohistochemically and graded according to gross and histological scale.RESULTS: Tirty-six rabbits were included in the final analysis. The defects of MSCs/DBM transplantation were repaired by byline-like tissue, and the other defects were repaired by fibrous tissue. Gross and histological grading scale was made on 12 weeks postoperatively. Gross and histological scores in the MSCs/DBM group were significantly lower than DBM group and control group (P<0.05); while, the scores in the DBM group was significantly lower than control group (P<0.05).CONCLUSION: The full-thickness cartilage defects of rabbits were repaired with homograft of mesenchymal stem cells seeded onto cancellous demineralized bone matrix, which is a promising way for the treatment of cartilage defects.

Objective To investigate the inhibitory effect of inhibitor 4 of growth(ING4)delivered by adenovirus on human breast carcinoma cell MDA-MB-231.Methods MDA-MB-231 human breast carcinoma cells were irfected with Ad-ING4.The expression level of ING4 gene was detected by RT-PCR and Western blot;The growth inhibition,cell-cycle alteration,and apoptosis were detected by MTT,Flowcytometry and Hochest33258 staining.respectively.RT-PCR was used to detect the transcription of Bax,Bc1-2,Survivin genes;The expression level of Ang-1 gene was detected by ELISA;Ad-ING4 was given intratumorally in athymic nude mice beating MDA-MB.231 tumors.and then tumor growth was monitored;The expression of Bc1-2,Bax and Caspase-3 was analyzed by immumohistochemistry.Results ING4 was successfully transcribed and translated iU MDA-MB-231 cells:Ad-ING4 significantly inhibited the proliferation and induced G_2/M phase arrest to(24.86±1.24)% and cell apoptosis of MDAMB-231.Intratumoral injection of Ad-ING4 suppressed the tumor growth obviously with a inhibitory rate of 49%;Immumohistochemistry showed that the expression of Bax,Caspase-3 were up-regulated and the expression of Bc1-2.Survivin,CD34 were down-regulated by Ad-ING4.Conclusions Ad-ING4 can inhibit the growth of MDA-MB-231 cells and induce apoptosis in vitro and in vivo.

Objective To explore the curative effect of the operation of double wedge osteotomy of the first metatarsal for correction of severe hallux valgus.Methods The data of 62 patients (87 feet) with severe hallux valgus caused by enlarged distal metatarsal articular angle (DMAA) who were followed up after receiving the treatment of double wedge osteotomy of the first metatarsal from January 2008 to December 2011 were analyzed retrospectively.There are 9 males (14 feet),and 53 females (73 feet),with an average age of 56 years (range,28-70 years).Preoperative radiographs showed hallux valgus angle (HVA) was 48.6° in average,intermetatarsal angle (IMA) was 19.8° in average,and DMAA was 22.1° in avcragc.Thc opcration plan was made based on the preoperative deformity,and the osteotomy site,the angle,the capacity of osteotomy was all based on preoperative measurement.Compare the changes of HVA,IMA,DMAA before and after operation.The changes were also compared before and after the internal fixation extraction.The curative effect was observation based on American Orthopaedic Foot and Ankle Society (AOFAS) propodium score standard.Results Sixty-two patients (87 feet) were followed up for 10 to 57 months,with an average of 21 months.HVA (14.6°±1.2°),IMA (7.9°±0.7°),DMAA (7.7°±0.9°) were all satisfied 6 months after the operation.Stiff occurred in 2 patients after the operation.Cutaneous nerve injury occurred in 2 patients,and metastatic metatarsalgia occurred in 1 patient.No sever recurrence of deformity,bone nonunion and bone necrosis was found in all the patients.AOFAS score reached 91.8±1.8 one year after the operation,which was 28.4±9.1 preoperatively.Among them,49 feet were rated as excellent,31 as good,and 7 as fair.The excellent and good rate was 92％ (80/87).Conclusion The first metatarsal double osteotomy can effectively correct the severe hallux valgus deformity with enlarged DMAA with few complications.It achieves good effect.Patients can bear part of the loading in the early stage of recovery after operation.

Objective To Explore the therapy of elderly patients with hypoproliferative acute myeloid leukemia.Methods Twenty-six elderly patients with hypoproliferative acute myeloid leukemia had received induction of CAG regimen and 15 cases were treated intensive chemotherapy after complete remission,then if achieving complete remission had received subsequent intensive chemotherapy: stand or reduce AA, DA or HA regimen.Results In 26 cases patients who received CAG regimen,the complete remission rate, partial remis sionrat and the totle total effective rate were 53.85％ (14/26), 19.23％ (5/26) and 73.08％ (19/26), respectively.Accordance with response to CAG regimen and the therapy after complete remission, 26 patients were divided into 3 groups:intensive chemotherapy after complete remission(CR1), non-intensive chemotherapy after complete remission(CR2) and non-remission(NR, including partial remission patients).The median overall survival of CR1 ,CR2 and NR were 13.5 months, 8.2 months, and 4.5 months, respectively.There was higher median overall survival of CR1 group than CR2 and NR groups (P =0.041,0.001, respectively).There was higher OS of CR2 group than NR group (P =0.064).No serious bleeding events were found in chemotherapy.Conclusion CAG regimen was an effective and little adverse effect regimen for the treatment of elderly H-AML,and with well tolerance in patients.Advisable intensive chemotherapy can prolong the patient's survival time after complete remission.

Objective To study two different methods in treatment of primary pterygium surgery on corneal epithelial wound repair and the influence on the recurrence rate.Methods Used prospective controlled study,accord-ing to a number table 128 patients with 128 eyes were randomly divided into control group (64 cases),and observa-tion group (64 cases).The two groups of patients underwent pterygium excision and limbal stem cell transplantation. The observation group (64 eyes)received 0.2 mg/mL mitomycin C of mitomycin -C(MMC)adjuvant therapy. Corneal epithelial wound repair speed was observed.The patients were followed up for 6 -12 months,average 8.5months,the recurrence rate of pterygium was observed in the two groups.Results The grafts were smooth,and the conjunctival flap healed well in the two groups.The postoperative corneal epithelial healing time of the control group and the observation group were (2.13 ±0.37)d,(2.87 ±0.41)d,there was statistically significant difference (t =4.91,P <0.01);The postoperative recurrence rates were 6.25%,4.69% respectively,there was no statistically sig-nificant difference (χ2 =0.48,P >0.05).Conclusion There was no difference in recurrence rate between two kinds of pterygium surgical method,but the combined MMC can cause corneal epithelial healing delay.

The signs and results of 14 patients with small hepatocelular carcinoma HCC of a diameter less than 3 cm (in 10 of them the daignosis was proven by pathology after surgery) obtained by CT,angiography and CT angiography were described in this article. The value of the above imaging modalities in the detection and diagnosis of small HCC was discussed with emphasis on the significance of the sequential staining sign from interior to exterior in CT and angiography.

Objective To analyze the genetic polymorphism of three short tandem repeat (STR) double loci,namely,six STR loci in the Chinese population of Han nationality in Jilin district and to obtain the corresponding genetic data.Methods DNA was extracted from the blood cells of one hundred and three unrelated individuals of Han nationality in Jilin district;Six loci were divided into three groups which were groupⅠ(TPOX+CSF1PO),groupⅡ(D3S1358+D13S317) and groupⅢ(D5S818+D19S400).The extracted DNA were amplified with PCR multiplexing method.The PCR products were analyzed by non-reduced PAGE,followed by silver staining.The allele frequency distributions of six STR loci were studied by statistical procedures.The heterozygosity (H),discrimination power (DP),probability of exclusion (PE) and polymorphic information content (PIC) were calculated.Results The allele frequencies of six loci were obtained.The genotypes distributions of the loci were consistent with Hardy-Weinberg equilibrium and had higher heterozygosities and PIC.The H,DP,PE and PIC were 0.7511-0.8376,0.8273-0.9247,0.5167-0.6718 and 0.7100-0.8195 respectively.Conclusions The three STR double loci exhibited higher polymorphism and were better genetic markers.The data on the allele frequencies of these six STR loci may be used in individual identification,paternity testing and in other population genetic researches.

Objective To study the clinical features and angiographic findings of moyamoya disease (MMD) as well as their relationship. Methods A total of 22 MMD patients received routine digital substraction angiography (DSA). The clinical manifestations and angiographic findings were analyzed. Results Clinical manifestations varied and each patient often had multiple symptoms, including cerebral infarction in 9 patients with an average age of 23.6 (13-39 years) and cerebral hemorrhage in 7 patients with an average age of 31.2 (28-46 years). Angiographic examination found that all the diseased sides showed MMD blood vessels. The patients who received encephalo-myo-arterio-synangiosis (EMAS) had better prognosis than those without receiving the treatment. Conclusion Cerebral infarction is frequent in children and adolescents with MMD, whereas cerebral hemorrhage is common in adults. DSA is a golden criterion for diagnosing MMD. Surgical treatment, EMAS blood supply reconstruction in particular, should be prescribed.