Alleviating Japanese encephalitis virus infection with multiple receptor tyrosine kinase inhibitor sunitinib / 中国热带医学

@#Abstract: Objective　To evaluate the effects of sunitinib on Japanese encephalitis virus (JEV) infection in vitro and vivo. Methods　The 4-week-old BALB/c mice infected with JEV by intraperitoneal injection. The infected mice were treated with sunitinib for 5 days and 10 days respectively. After that, the change of weight and survival rate were evaluated continuously. The viral load variation in mice brain were detected by qRT-PCR. Indirect immunohistochemical staining assay (IFA) was used to detect the number and distribution of CD4+/CD8+T cells in mouse brain. IFA was also used to observe the expression of virus E protein in the brain of mice. Vero cells were infected with JEV in vitro and given a certain concentration of sunitinib to observe the cell survival status. The expression of virus E protein in cells was detected by IFA. Results　Continuous administration of sunitinib significantly improved the survival rate of infected mice. Survival rate and body weight changes showed that the 5-day's administration strategy was significantly better than the 10-day's administration strategy. The treatment of sunitinib decreased the infiltration of CD4+/CD8+T cells in the brain and reduced the changes of vascular sleeve. However, the variation of viral load and E protein expression in brain were not obvious. The cytopathic effect (CPE) of infected Vero cells were slightly relieved after giving sunitinib, and the expression of E protein was also slightly changed. Conclusion　Sunitinib can significantly reduce the mortality of infected mice, and the 5-day's administration strategy is significantly better than the 10-day's administration strategy. Sunitinib decrease T lymphocyte infiltration in brain of mice, relieve the encephalitis symptoms ,and prolonged the life of mice.

Neoadjuvant chemoradiotherapy combined with surgery versus direct surgery in the treatment of Siewert type II and III adenocarcinomas of the esophagogastric junction: long-term prognostic analysis of a prospective randomized controlled trial / 中华胃肠外科杂志

Objective: To investigate the effectiveness, safety, and prognosis of neoadjuvant chemoradiotherapy (nCRT) for Siewert type II and III adenocarcinomas of the esophagogastric junction (AEG). Methods: This study is a prospective randomized controlled clinical study (NCT01962246). AEG patients who were treated at the Third Department of Surgery of the Fourth Hospital of Hebei Medical University from February 2012 to June 2016 were included. All of the enrolled patients were diagnosed with type II or III locally advanced AEG gastric cancer (T2-4N0-3M0 or T1N1-3M0) by gastroscopy and CT before operation; the longitudinal axis of the lesion was ≤ 8 cm; no anti-tumor treatment was previously given and no contraindications of chemotherapy and surgery were found. Case exclusion criteria: serious diseases accompanied by liver and kidney, cardiovascular system and other vital organs; allergy to capecitabine or oxaliplatin drugs or excipients; receiving any form of chemotherapy or other research drugs; pregnant or lactating women; patients with diseases resulting in difficulty to take capecitabine or with concurrent tumors. Based on sample size estimation, a total of 150 AEG patients were enrolled. Using the random number table method, the enrolled patients were divided into the nCRT group and the direct operation group with 75 cases in each group. The nCRT group received XELOX chemotherapy (capecitabine+ oxaliplatin) before surgery and concurrent radiotherapy (45 Gy, 25 times, 1.8 Gy/d, 5 times/week). Clinical efficacy of the nCRT group was evaluated by the solid tumor efficacy evaluation standard (RECIST1.1) and the tumor volume reduction rate was measured on CT. After completing the preoperative examination in the direct operation group, and 8-10 weeks after the end of nCRT in the nCRT group, surgery was performed. Laparoscopic exploration was initially performed. According to the Japanese "Regulations for the Treatment of Gastric Cancer", a transabdominal radical total gastrectomy combined with perigastric lymph node dissection was performed. The primary outcome was the 3-year overall survival (OS) and disease-free survival rate (DFS); the secondary outcomes were R0 resection rate, the toxicity of chemotherapy, and surgical complications. The follow-up ended on December 31, 2019. The postoperative recurrence, metastasis and survival time of the two groups were collected. Results: After excluding patients with incomplete clinical data, patients or family members requesting to withdraw informed consent, and those failing to follow the treatment plan, 63 cases in the nCRT group and 69 cases in the direct operation group were finally enrolled in the study. There were no statistically significant differences in baseline characteristics of the two groups (all P>0.05). Sixty-three patients in the nCRT group were evaluated by RECIST1.1 after treatment, the image based effective rate was 42.9% (27/63), and the stable disease rate was 98.4% (62/63); the tumor volume before and after nCRT measured on CT was (58.8±24.4) cm(3) and (46.6±25.7) cm(3), respectively, the effective rate of tumor volume reduction measured by CT was 47.6% (30/63). Incidences of neutrophilopenia [65.1% (41/63) vs. 40.6% (28/69), χ(2)=7.923, P=0.005], nausea [81.0% (51/63) vs. 56.5% (39/69), χ(2)=9.060, P=0.003] and fatigue [74.6% (47/63) vs. 42.0% (29/69), χ(2)=14.306, P=0.001] in the nCRT group were significantly higher than those in the direct surgery group. Radiation gastritis/esophagitis and radiation pneumonia were unique adverse reactions in the nCRT group, with incidences of 52.4% (33/63) and 15.9%(10/63), respectively. The classification of tumor regression of 63 patients in nCRT group presented as 11 cases of grade 0 (17.5%), 20 cases of grade 1 (31.7%), 28 cases of grade 2 (44.4%), and 5 cases of grade 3 (7.9%). Eleven (17.5%) patients achieved pathologic complete response. Sixty-one (96.8%) patients in the nCRT group underwent R0 resection, which was higher than 87.0% (60/69) in the direct surgery group (χ(2)=4.199, P=0.040). The mean number of harvested lymph nodes in the specimens in the nCRT group and the direct operation group was 27.6±12.4 and 26.8±14.6, respectively, and the difference was not statistically significant (t=-0.015, P=0.976). The pathological lymph node metastasis rate and lymph node ratio in the two groups were 44.4% (28/63) vs. 76.8% (53/69), and 4.0% (70/1 739) vs. 21.9% (404/1 847), respectively with statistically significant differences (χ(2)=14.552, P<0.001, and χ(2)=248.736, P<0.001, respectively). During a median follow-up of 52 (27-77) months, the 3-year DFS rate in the nCRT group and the direct surgery group was 52.4% and 39.1% (P=0.049), and the 3-year OS rate was 63.4% and 52.2% (P=0.019), respectively. According to whether the tumor volume reduction rate measured by CT was ≥ 12.5%, 63 patients in the nCRT group were divided into the effective group (n=30) and the ineffective group (n=33). The 3-year DFS rate of these two subgracps was 56.6% and 45.5%, respectively without significant difference (P=0.098). The 3-year OS rate was 73.3% and 51.5%,respectively with significant difference (P=0.038). The 3-year DFS rate of patients with the tumor regression grades 0, 1, 2 and 3 was 81.8%, 70.0%, 44.4%, and 20.0%, repectively (P=0.024); the 3-year OS rate was 81.8%, 75.0%, 48.1% and 40.0%, repectively (P=0.048). Conclusion: nCRT improves treatment efficacy of Siewert type II and III AEG patients, and the long-term prognosis is good.

Evolution of lubricating adsorption films with protein aqueous solution under impact loads / 医用生物力学

Objective To study the dynamic growth of adsorption films on solid surfaces in point contacts with aqueous protein aqueous solutions and investigate the dominating factors.Methods The formation of the adsorption films within a ball-on-disc contact was measured using optical interference technique.The effects of impact loads,impact times and surface properties of the materials on the adsorption of BSA aqueous solution were also studied.Results Under dynamic conditions,the thickness of the adsorption film was much higher than that under static condition.The adsorption film was growing with increasing impact times and finally the stable thickness could be achieved.Small loads and hydrophobic materials were favorable for the growth of the adsorption film.The BSA adsorption film was easy to grow on the steel surface,but on the ceramic surface the adsorption film thickness was low.Conclusions The research about adsorbed lubricating films evolution of protein aqueous solution under impact loads is of clinical significance for treating and preventing of artificial prosthesis.

Evolution of lubricating adsorption films with protein aqueous solution under impact loads / 医用生物力学

Objective To study the dynamic growth of adsorption films on solid surfaces in point contacts with aqueous protein aqueous solutions and investigate the dominating factors. Methods The formation of the adsorption films within a ball-on-disc contact was measured using optical interference technique. The effects of impact loads, impact times and surface properties of the materials on the adsorption of BSA aqueous solution were also studied. Results Under dynamic conditions, the thickness of the adsorption film was much higher than that under static condition. The adsorption film was growing with increasing impact times and finally the stable thickness could be achieved. Small loads and hydrophobic materials were favorable for the growth of the adsorption film. The BSA adsorption film was easy to grow on the steel surface, but on the ceramic surface the adsorption film thickness was low. Conclusions The research about adsorbed lubricating films evolution of protein aqueous solution under impact loads is of clinical significance for treating and preventing of artificial prosthesis.

A study on the influence of maternal history of allergy on the levels of cytokine in umbilical cord blood / 预防医学

Objective To explore the effect of maternal history of allergy on the cytokine level in umbilical cord blood. Methods A prospective study was conducted among pregnant women in Yiwu City,China.136 participants were selected from the Yiwu maternal and child healthcare hospital in 2012.A questionnaire interview was conducted.The umbilical cord blood sample were collected to detect the level of IgE,eosinophile granulocyte,eotaxin,IL -9,IL -6,IL -4,IL -5, IFN -γ,IL -10.The association between allergy history and cytokine levels was analyzed.Results All subjects were recruited and divided into two groups(pregnant women with allergy history and without allergy history).Compared with the pregnant women with allergy history,these subjects without allergy history had higher IL -13 (5.52 pg/ml vs 2.84 pg/ml) and IL4 (43.33 pg/ml vs 8.23 pg/ml)(P <0.05).Besides,there is a correlation between IL -13 and IL -4 (rs =0.87,P <0.01).Partial correlation analysis showed the correlaiots among IL -4,IL -5,IL -9,IL -10,IFN -γand eotaxin.Conclusion The levels of IL -13 and IL -4 are significantly associated with the history of allergy in pregnant women.It could be considered the indexes are sensitive for early screening and surveillance of allergy for babies.

A study on the influence of parental history of allergy on the level of cytokine in umbilical cord blood / 预防医学

Objective To explore the influence of parental history of allergy on the cytokine level of umbilical cord blood of neonates.Methods A prospective study was conducted which selected the pregnant women attending Yiwu maternal and child healthcare hospital from July to December in 2012 as objects.The umbilical cord blood sample were collected to detect the level of IgE,eosinophile granulocyte,eotaxin,IL -9,IL -6,IL -4,IL -5,IFN -γand IL -10. Results A total of 136 subjects were recruited and divided into three groups according to the status of parental allergy histories.There was no significant difference in social and demographic characteristics among the three groups (P>0.05). Three groups have significantly different median concentration of IL-13 (1.82pg/mL vs.3.24pg/mL vs.6.12pg/mL), eotaxin (29.33pg/mL vs.50.71pg/mL vs.60.15pg/mL),IL-9 (43.75pg/mL vs.111.17pg/mL vs.183.19pg/mL), IL-6 (11.49pg/mL vs.19.35pg/mL vs.26.09pg/mL),IL-4 (3.67pg/mL vs.21.27pg/mL vs.49.51pg/mL),IL-5 (4.26pg/mL vs.7.69pg/mL vs.10.66pg/mL),IFN-γ(338.65pg/mL vs.649.17pg/mL vs.834.14pg/mL),IL-10 (7.13pg/mL vs.10.56pg/mL vs.14.64pg/mL),P <0.05.Conclusion Parental history of allergy could have influence on cytokine level of umbilical cord blood.Early screening and surveillance in neonates whose parents have history of allergy should be taken to guide early interventions.

Risk factors for recurrent respiratory infections in preschool children in China

To identify and compare risk factors for recurrent respiratory infections in preschool children between resident and floating population in Yiwu, China. Investigations was conducted in resident and floating population in Yiwu city, Zhejiang province. A structured questionnaire was used to collect information on influence factors. Univariate and multivariate analyses were carried out using the Binary logistic regression. The study was conducted in Yiwu from June 2009 to September 2010. We recruited 844 participants, resident population 639[75.7%] and floating population 205[24.3%] who were preschool children. Multivariate analysis showed that Childbearing age [OR=0.93, 95%CI: 0.88-0.99], Asthma [OR=3.20, 95%CI: 1.60-6.45], Rickets [OR=5.30, 95%CI: 1.99-14.09], Food preference [OR=1.57, 95%CI: 1.02-2.43], Snack [OR=1.50, 95%CI: 1.07-2.07] were the influence factors for recurrent respiratory infections in resident preschool children. Infant feeding [OR=2.24, 95%CI: 1.31-3.81], Snack [OR=2.06, 95%CI: 1.07-3.98,], Trip mode [OR=2.77, 95%CI: 1.11-6.94] were the influence factors for recurrent respiratory infections in floating preschool children. Public health measures against risk factors should be taken to protect against recurrent respiratory infections in resident and floating preschool children respectively

Effects of XELOX regimen as neoadjuvant chemotherapy on radical resection rate and prognosis in patients with advanced gastric cancer / 中华肿瘤杂志

<p><b>OBJECTIVE</b>The purpose of this study was to investigate the efficacy and mechanism of oxaliplatin in combination with capecitabine (XELOX) regimen as neoadjuvant chemotherapy in the treatment of patients with advanced gastric cancer.</p><p><b>METHODS</b>Eighty-five patients with advanced gastric cancer (stage IIB and IIIC) were randomly divided into two groups: neoadjuvant chemotherapy group (40 cases) and surgery alone group (45 cases). In the neoadjuvant chemotherapy group, patients received oral administration of Xeloda 1000 mg/m(2) twice a day on days 1-14 and intravenous infusion of oxaliplatin 130 mg/m(2) on day 1 (XELOX regimen). The regimen was repeated every 21 days. In the surgery alone group, patients directly received radical resection of gastric cancer. The R0 resection rate, overall survival and disease free survival (DFS) were observed in all cases. The cycles and apoptosis rate of the gastric cancer cells were detected by flow cytometry. The expression of proliferating cell nuclear antigen (PCNA), p21, p53 and survivin was detected by Western blot.</p><p><b>RESULTS</b>In the neoadjuvant chemotherapy group, the total effective rate was 32.5% (13/40), and the tumor control rate was 90% (36/40), with few side effects. Compared with the surgery alone group, R0 resection rate was significantly higher in the neoadjuvant chemotherapy group (P < 0.05). The survival analysis indicated that both the overall survival and DFS were longer in the neoadjuvant chemotherapy group in comparison with those in the surgery alone group, but no significant differences were found (P > 0.05). In the neoadjuvant chemotherapy group, both the apoptosis rate and the ratio of cells in stage G0 and G1 were significantly higher than those in the surgery alone group (P < 0.05). The expression of PCNA and survivin was lower in the neoadjuvant chemotherapy group, while the expression of p21 and p53 was higher.</p><p><b>CONCLUSIONS</b>XELOX regimen as neoadjuvant chemotherapy in the treatment of patients with advanced gastric cancer can effectively improve the R0 resection rate and prolong the survival time of the patients. Its mechanism is probably that the neoadjuvant chemotherapy can markedly enhance apoptosis in gastric cancer cells and inhibit their proliferation.</p>

Analysis on the imaging features of AIDS with pulmonary fungal infection / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>Pulmonary fungal infection is one type of the common opportunistic infections in AIDS patients. The disease is hard to diagnose because of its complicated imaging features. The objective of this study was to investigate the imaging performance characteristics of pulmonary fungal infection in AIDS patients.</p><p><b>METHODS</b>Fifty-one patients with AIDS complicated with pulmonary fungal infection and 56 patients of non-AIDS with pulmonary fungal infection were examined by CT scans and high-resolution CT scans. The contrast enhanced scans were performed in patients with the mass or suspected enlarged mediastinal lymph nodes. Results were compared between the two groups.</p><p><b>RESULTS</b>The most common fungal infection in the two groups of patients was Candida albicans. The infection rates were 54.8% (28 cases) in the group (AIDS patients with pulmonary fungal infection) and 58.3% (32 cases) in another group (non-AIDS patients with pulmonary fungal infection). In the two groups, the difference in diffuse distribution and the difference in incidence of affected upper and lower lobes in the bilateral lung fields were statistically significant. The differences in patchy or large consolidation shadow, cavitas, enlarged lymph nodes in mediastinum and pleural effusion were also significant when comparing the two groups.</p><p><b>CONCLUSIONS</b>The lesion in most of AIDS patients with pulmonary fungal infection tends to exhibit diffuse distribution, patchy or large consolidation shadow covering a more extensive region. The differences between AIDS with pulmonary fungal infection and non-AIDS with pulmonary fungal infection are statistically significant in lesion location and complicated imaging features. The most common fungal infection in AIDS patients is Candida albicans.</p>

Establishment of a new rabbit model of ischemic cerebral infarction by autologous clot embolism / 南方医科大学学报

<p><b>OBJECTIVE</b>To establish a convenient method for preparing rabbit models of ischemic cerebral infarction using autologous clot embolism.</p><p><b>METHODS</b>Ischemic cerebral infarction was induced in rabbits by embolizing the middle cerebral artery using autologous clot emboli. Clinical and histological observations were carried out to evaluate the validity of the animal model.</p><p><b>RESULTS</b>Hemiplegia of different severities was observed in the rabbits after the operation. TTC and HE staining of the brain sections confirmed ischemic cerebral infarction 6 h after obstructing the middle cerebral artery with the autologous clot emboli.</p><p><b>CONCLUSION</b>Embolizing the middle cerebral artery using the autologous emboli is convenient to induce focal ischemic cerebral infarction in rabbits. This model has practical value in the study on the mechanism of ischemic cerebrovascular disease and in developing new strategies for prevention and treatment of the relevant diseases in human.</p>

Expression and correlation of NKG2D and sMICA in lung cancer patients / 肿瘤研究与临床

Objective To investigate the expression and correlation of NKG2D and sMICA in lung cancer patients. Methods By collecting 30 lung cancer patients as the test group,and taking 30 healthy volunteers as the contrast group, the expression of NKG2D and sMICA in the two groups were examined separately by FACS and ELISA method. Results The expressions of NKG2D in the two groups were (81.56±8.78) %, (85.63±6.62) %. The lung cancer patients were high remarkable. There was a significant difference between the two groups (P <0.05). The expression of sMICA in the two groups were (354.13 ±80.575) pg/ml,(216.53±48.175) pg/ml. The lung cancer patients were low remarkable. There was a significant difference between the two groups (P <0.01). There was a significant relation between the two groups (r =-0.349, P =0.006). Conclusion The expression of NKG2D and sMICA may provid one of the immune targets for diagnosing that can forecast the immune state and malignant metastasis of the lung cancer patients. The significant relation between NKG2D and sMICA may take on main role in the immune escaping of tumor. It may provide the suitable target of the patients for tumor organisms and immune treatment.

The comparison of mfVEP in normal eyes and glaucomatous eyes / 国际眼科杂志(Guoji Yanke Zazhi)

AIM: To test the ability of multifocal visual evoked potential (mfVEP) in the detecting of glaucoma by comparing the mfVEP recorded from normal subjects and glaucoma patients.METHODS: The mfVEP of 32 normal eyes (n =21) and of 58 eyes (n =37) with primary glaucoma were recorded with the Vision Monitor electrophysical apparatus by the second kernel analysis and to determine the correlation of the topographic location between them.RESULTS: There were significant variability (the coefficient of variation was 43.05%) in mfVEP RMS amplitude in the normal subjects; The RMS amplitude of eyes with glaucoma were smaller than that of the normal eyes and significantly statistical difference were found in the relatively center (namely the 0° -10° ring zone) and in superior nasal quadrant (P＜0.05) while there were no significantly statistical differences of the latency time between them.CONCLUSION: The normal subjects have large individual variability of mfVEP responses. The RMS amplitude of the mfVEP of glaucomatous eyes descends, especially in center zone and superior nasal quadrant.

Refinement of the locus for non-syndromic sensorineural deafness (DFN2).

Non-syndromic X-linked deafness is a rare form of genetic deafness in humans accounting for a small proportion of all hereditary hearing loss. Different clinical forms of non-syndromic X-linked deafness have been described, and most of these have been mapped. Here, we report a Chinese family affected by a congenital profound sensorineural hearing loss. All phenotypes of this family are clinically compatible with non-syndromic sensorineural deafness (DFN2). A maximum two-point Lod score of 2.32 was obtained at marker DXS6797 (theta = 0.00). Recombinants define a region of 4.3 cM flanked by markers DXS6799 and GATA172D05. This region overlaps the previously reported DFN2 region by 2.0 cM.

EFFECT OF r-IRRADIATION ON THE METABOLISM OF ASCORBIC ACID / 营养学报

Guinea pigs were given orally with a daily dose of 0.5 mg ascorbic acid per 100 g body weight 20 days before and 4 days after a whole-body r-irradiation and then injected subcutaneously with 10 mg ascorbic acid at 24 hours intervals. During the injection period, the daily urinary output of total ascorbic acid in the animals irradiated with 500 or 1000 r was significantly higher than that in controls, but the difference of 24 hours excretions of total ascorbic acid between the group irradiated with 150 or 250 r and the control group was not statistically significant.As shown in the urinary output of dehydroascorbic acid and diketo- gulonic acid estimated by our modified Roe's method, r-irradiation has no effect on its excretion in guinea pigs and rats.The levels of ascorbic acid in plasma, spleen and adrenals were significantly lower in the irradiated group than in the control group, but might increase with the increase of the injected dose of ascorbic acid.