BACKGROUND:Whether there are breast cancer stem cel microspheres in the breast cancer tissues and whether these microspheres have an impact on isolation and culture of breast cancer stem cel s after different cycles of neoadjuvant chemotherapy are stil unclear. OBJECTIVE:To explore the proliferation and differentiation of breast cancer stem cel s in breast cancer tissues after different cycles of neoadjuvant chemotherapy. METHODS:Breast cancer stem cel microspheres were isolated from the breast cancer tissues after different cycles of neoadjuvant chemotherapy to drawn a cel growth curve. Immunocytochemical method was used to detect ALDH1 expression. RESULTS AND CONCLUSION:Microspheres could be obtained from the specimens of neoadjuvant chemotherapy for two, three and four cycles rather than one cycle. At 3 days prior to culture, there was no difference in the number of cel s isolated after two-and three-cycle neoadjuvant chemotherapy;but after 3 days, the cel s from the three-cycle neoadjuvant chemotherapy proliferated faster than those from the two-cycle neoadjuvant chemotherapy;after 6 days, the cel growth curve of two-cycle neoadjuvant chemotherapy was in the plateau stage, and the proliferation of cel s from the three-cycle neoadjuvant chemotherapy showed a rapid increase trend. The positive expression of ALDH1 in the microspheres from the three-cycle neoadjuvant chemotherapy was higher than that from the two-cycle neoadjuvant chemotherapy. These findings indicate that breast cancer stem cel s from the specimens of two-and three-cycle neoadjuvant chemotherapy both have proliferation and differentiation potentials, and the specimens of three-cycle neoadjuvant chemotherapy or above are preferred.

The morbidity and nortality of esophageal carcinoma showed an upward trend in recent years.Neoadjuvant radiochemotherapy is the nain mode of treatment for advanced esophageal carcinoma,including neoadjuvant chemotherapy,neoadjuvant radiotherapy and neoadjuvant radiochemotherapy.However,there are still many controversies on efficacies and advantages or disadvantages of treatment mode.In this article,authors will investigate the present situations and future direction of neoadjuvant therapy for locally advanced esophageal carcinoma.

Objective To investigate whether there are correlations between working memory impairmentand fractional anisotropy values and to explore the neuropathology underlying that the patients of depression suffered from memory impairment.Methods Thirty depression patients and 30 healthy controls group-matched by age,educational level were conducted the study.Mean correct reaction time(mRT)was recorded when they performed a One-Back Working Memory Task and fractional anisotropy(FA)values was recorded when they performed the diffusion tensor imaging.Statistics analysis was done respectively for mRT and FA values between two groups.Results Relative to mean correct reaction time((612.45±54.08)ms)of controls,the mean correct reaction time ((720.25±57.02)ms)of patients with depression was much longer(P＜0.05)and the patients with depression had a lower FA values in the white matter of both frontal lobe,anterior cingulate gyrus,supramarginal gyrus,splenium of corpus callosum(P＜0.05),and the FA values in the white matter of both frontal lobe were significantly negative correlated with mRT(r=-0.604,P＜0.05).Conclusion The impairment of white matter region may be one of the neuropathology underlying that the depression patients suffer from memory impairment.

Objective To investigate the characteristics and relative pathogenesis of cognitive impairment in people with depression.Methods 24 people with depression and 24 healthy controls were evaluated respectively with HAMD scale,the WCST test,N-BACK task P300 and fMRI.Results (1) The WCST scores,N-back reaction (MRT),the P300 incubation period in depression group were significantly different from those in control group(P300 wave amplitude(4.12± 1.51) μV vs (6.42± 1.73) μV ; P300 latency(392.02±23.60) ms vs (309.43± 21.39) ms,t=4.922,P＜0.01 ; t=12.726,P＜0.01).(2) The illness course had positive correlation with Rep(r=0.596,P＜0.01) and mRT(r=0.518,P＜0.01).The P300 latency had positive correcation with Rpe(r=0.929,P＜ 0.01) and mRT(r=0.939,P＜0.01).(3)Compared with control group,the decreased activation area in patients with depression were as follows:bilateral frontal gyrus,left middle frontal gyrus,inferior frontal gyrus and superior parietal lobule.Conclusion The depressive patients exist cognitive impairment mainly in frontal lobe.The longer with the illness,the wose with the impairment.P300 incubation period is a sensitive indicator of the frontal executive function.

Objective To investigate the characteristics of co-infection in initial treatment acute leukemia induction chemotherapy.Methods The clinical features of 179 untreated acute leukemia patients with nosocomial infection were analyzed after combined chemotherapy.Results In the 179 patients,151cases achieved complete remission,the complete remission rate was 84.4 ％,82 cases suffered from nosocomial infections,the incidence of infection was 45.8 ％.The sites of infection were oral,anal,lung,as well as primary foci was not clear bacteremia.In 428 specimens,the isolated bacterial colony counted a total of 66,the number of fungal colonies was 9,the bacterial colony was G-bacteria-based.G-bacteria had different degrees of resistance to many antibiotics.Extended-spectrum β-lactamases strains had not been detected in these specimens.Conclusion Acute leukemia patients is easy to co-infection after chemotherapy.Control and prevention of nosocomial infections should run throughout the entire treatment process,application of laminar flow bed helps reduce the newly diagnosed acute leukemia patients with nosocomial infection incidence.

Objective To explore the role and their relationship of Ki-67, VEGF and p27 expressed in adult patients with acute leukemia. Methods The expression of Ki-67, VEGF and p27 in bone marrow mononuclear cells (BMMNC) were analyzed by immunocytochemical staining, and their correlations of Ki-67, VEGF and p27 were statistically analyzed. Results The expression of Ki-67(42.48±25.78)% or VEGF (44.89±24.01)% on BMMNC from acute leukemia cells was significantly higher than that in the control (11.40±9.94)% or (16.90±12.54)% (P<0.01). But the expression of p27 (23.65±13.30)% was significantly lower than that in the control (50.23±22.68)% (P<0.01). The expressions of Ki-67 were positively correlated with and VEGF in patients with acute leukemia were positively correlated(r=-0.666, P<0.01), and the expressions of Ki-67 and p27 were negatively correlated with p27 in patients with acute leukemia (r=-0.316, P<0.05).Conclusion The evaluation of expression of Ki-67, VEGF and p27 on acute leukemic cells provides new insights to the pathogenesis is helpful in mechanism and is helpful in the diagnosis of acute leukemia.

Objective To prepare transferring and R8 co-modified liposome (TF/R8-LP)for forhepatoma targeting.Methods The co-modified liposome were prepared by film-ultrasonic method.The appearance,particle size,Zeta potential were evaluated.The cellular uptake by HepG2 cell in vitro was used to evaluate the targeting efficiency and in vivo imaging were used to evaluate the targeting efficiency. Results The particle diameter of the co-modified liposome was(108.5 ±12.6)nm and the Zeta potential was(24.15 ±4.78)mV.The liposome kept stable in 50% FBS at 24 h.The result demonstrated that the co-modified liposome uptaken by HepG2 were 2.4,2.6 times higher than that of R8-LP and TF-LP,respectively(P<0.05).The evaluation of tumor spheroid penetration and in vivo imaging results showed the co-modified liposome had the strongest fluorescence intensity. Conclusion The co-modified liposome might serve as a promising hepatoma delivery system of antitumor drugs.

Background and purpose:Thalidomide can enhance the radiation sensitivity on tumor effectively, but the mechanism of radiosensitization is still unclear. The present study aimed to investigate whether thalidomide could enhance the radiation sensitivity on colon cancer transplanted tumor of mouse, and to investigate the underlying mechanism. Methods: We established the model of colon26 colonic carcinoma, and the mice were divided into 4 groups:Control group, the thalidomide group, the radiotherapy group and thalidomide+radiotherapy group. From the day of treatment, tumors were measured every other day. Then, the xenograft tumor growth curve was depicted. Tumor volumes were measured in different treatment groups, then, the inhibitory rates of tumor growth were calcutated. Using immunohistochemical method in to detect the expression of microvessel density (MVD) in tumor tissue. Results:The mean tumor volumes at day 22 were (4.97±1.20)cm3 (control group), (2.90±0.92)cm3 (T group), (2.66±0.88)cm3 (R group), and (1.89±0.76)cm3 (T+R group). The tumor inhibition rate in the combination group (61.9%) was signiifcantly higher than the other groups (41.7%, 46.5%, P<0.05). The radiotherapy sensitization enhancement ratio of the combined treatment group was 2.27 times than in the radiotherapy group. Thalidomide combined with radiation therapy can significantly inhibit microvessel density of tumor:The decreasing MVD of T+R group, T group and R group were respectively 46.8%, 40.7%and 37.7%, and there was statistical significance between T+R group and T group (P<0.05 ), so as between T+R group and R group. It could be found more necrotic cells in tumor of group, and there was statistical signiifcance between T+R group and control group (P<0.05). Conclusion:Thalidomide can enhance the radiosensitivity mice of colonic carcinoma, and its mechanism may be related to the inhibition of tumor angiogenesis related.

Objective To observe the expression of neuron specific enolase (NEC) to evaluate the neuroprotective effect of a cell-penetrating Bax-inhibiting peptide (BIP) on neonatal rats with hypoxic-ischemic brain damage (HIBD). Methods Wi-star rats (7-day old) were randomly divided into Sham group, BIP group and HIBD group. After modeling HIBD, the histologi-cal (HE staining) and immunohistochemistry methods were used to determine the apoptotic pathological changes and the NSE expression levels in the brain at different time points. Results Compared to the Sham group, the rats of HIBD group showed significant apoptotic pathological changes. The histological changes and the brain damages were improved significantly in BIP group at each sampling point. The number of NSE-positive cells was significantly decreased in HIBD and BIP groups over time (P<0.05). The number of NSE-positive cells had significant difference among different groups at 48 h, 96 h and 7 d after opera-tion (F=45.35-81.66, P<0.01). The number of NSE-positive cells in the HIBD group was smaller than that of the Sham group and BIP group 48 h after operation (P<0.05). The number of NSE-positive cells in the BIP group was smaller than that of the Sham group 96 h after operation (P<0. 05). Conclusions BIP can decrease the apoptosis of cortex nerve cells in 7-day old HIBD rat model, and may have neuroprotective effect on the early stage of HIBD.

ObjectiveTo explore the correlation of resilience and coping style,subjective quality of life of young children of schizophrenia patients.Methods 120 adolescents whose parents were clearly diagnosed with schizophrenia wcrc chosen for the study.They were ranked according their performances by Resilience Scale for Adolescents.32 were classified into the group with high resilience and another 32 were assigned to the group with low resilience by applying the criteria that 27％ of the sample size should be differentiated.Then,children in highscore group and low-score group were administered by Simple Coping Style Questionnaire (SCSQ) and Children 's Subjective Quality of Life Questionnaire(ISLQ).ResultsResilience score of research group were lower than those of normal high school students(P＜ 0.05 or 0.01 ).The score and total score of SCSQ positive coping dimensionality of research group who had high resilience score were higher than those of low resilience score group(P ＜ 0.01 ) ;score of passive coping dimensionality were lower than those of low resilience score group (P ＜ 0.01 ).In addition to dimensionality of living environment,the score of dimensionality of cognitive and affective element and the total score of ISLQ of research group who had high resilience score were higher than those of low resilience score group.The total score of resilience was in significant by positive correlation with the total score of ISLQ,cognitive and affeetive element,the total score of SCSQ,the score of positive coping dimensionality.The total score of resilience was in negative correlation with the score of passive coping dimensionality (P ＜ 0.01 ) ;dimensionality of the target focus of resilience was not correlative with cognitive element of ISLQ,the score of negative coping dimensionality of SCSQ,scores of other dimensionality of resilience were in significant correlation with score of other dimensionality of ISLQ and SCSQ(P ＜ 0.01 or 0.05 ).ConclusionYoung children of schizophrenia have poor resilience; research group who has high resilience score adopts more positive coping and has better subjective quality of life ; resilience is positive correlation with positive coping and subjective quality of life.