Defibrillators ; Humans ; Myocardial Infarction

AIM To research the antiasthmatic effects of Zuogui Pills,Yougui Pills and Yupingfeng Powder and their mechanism of action.METHODS Male Brown Norway rats were randomly divided into five groups.OVA was used to induce the model of chronic asthma.Five groups of asthmatic rats were given Zuogui Pills,Yougui Pills,Yupingfeng Powder by gavage once daily for 14 d,respectively.The normal and the model group were given normal saline.Penh value,serum Thl,Th2 inflammatory cytokines,and CROT and ACTH protein levels were determined.Pathological changes of airway remodeling were measured.RT-PCR method was used to measure the expression of CRH mRNA in hypothalamus,and TGF-β1 and Smad3 mRNA in lung tissues.RESULTS Penh values of Yupingfeng Powder group and Yougui Pills group were significantly lower than that of Zuogui Pills group.The Thl inflammatory cytokine of Yupingfeng Powder group was significantly higher than that of Zuogui Pills group,while the Th2 cytokine was significantly lower than that of Zuogui Pills group.In Yougui Pills group,only IL-5 was significantly lower than that of Zuogui Pills group.Serum CROT,ACTH protein and CRH mRNA of Yupingfeng Powder group were significantly higher than those in Zuogui Pills group.No significant difference was found between Yupingfeng Powder group and Zuogui Pills group with regard to TGF-β1 and Smad3 mRNA.Smad3 mRNA of Yougui Pills group was significantly higher than that of the model group.Airway remodeling was significantly reduced by Yupingfeng Powder and Zuogui Pills.The number of goblet cells in Yougui Pills group was significantly lower than that in Zuogui Pills group.CONCLUSION All the three formulaes possess significant antiasthma effects.Regulation effects of Yupingfeng Powder on Thl/Th2 balance,HPA and TGF-β1/Smad3 pathway are strong.Compared with Zuogui Pills,Yougui Pills possesses weaker TGF-β1/Smad3 regulative effects and stronger HPA regulative effects.

Objective:To investigate the effect of white matter hyperintensities (WMHs) location on the clinical outcomes in patients with anterior circulation acute ischemic stroke (AIS) after intravenous thrombolysis.Methods:Patients with anterior circulation AIS treated with alteplase intravenous thrombolysis in Xuzhou Central Hospital from February 2015 to February 2020 were enrolled retrospectively. The severity of periventricular WMHs (PWMHs) and deep WMHs (DWMHs) was assessed by Fazekas scale. According to the score of the modified Rankin Scale at 90 d after onset, the patients were divided into good outcome group (0-2) and poor outcome group (3-6). The demographic and clinical data were compared between the two groups. Multivariate logistic regression analysis was used to investigate the effect of WMHs location on the clinical outcome in AIS patients treated with intravenous thrombolysis. Results:A total of 408 patients with anterior circulation AIS were enrolled in the study, including 272 males (66.7%) and 136 females (33.3%). Their age was 64.1±12.1 years (range, 40-92years). The baseline median National Institutes of Health Stroke Scale (NIHSS) score was 6 (interquartile range, 4-16). Three hundred and fourteen patients (77.0%) were in the good outcome group and 94 (23.0%) were in the poor outcome group. There were significant differences in age, atrial fibrillation, diabetes mellitus, baseline NIHSS score, blood glucose level before thrombolysis, etiological classification of stroke, PWMHs, DWMHs, hemorrhagic transformation, early neurological deterioration and stroke recurrence between the two groups (all P<0.05). Multivariate logistic regression analysis showed that moderate to severe PWMHs were significantly and independently associated with the poor outcomes in patients with anterior circulation AIS treated with intravenous thrombolysis at 90 d after onset (odds ratio 2.357, 95% confidence interval 1.086-5.115; P=0.030). Other independent related factors included age, baseline NIHSS score, etiological classification of stroke (large artery atherosclerosis and cardiogenic embolism), early neurological deterioration, hemorrhagic transformation, and stroke recurrence. Conclusion:Moderate to severe PWMHs is an independent risk factor for poor outcomes at 90 d after onset in patients with anterior circulation AIS treated with intravenous thrombolysis.

Objective To investigate the effect of gradient heat stress on phagocytosis of hepatic Kupffer cells (KCs) in vitro in rats. Methods Rat Kupffer cells were isolated in vitro and the temperature for gradient heat stress was set at 37, 39, 41 and 43℃. After thermal stimulation, cell injury was detected by PI and Hochest33342 staining. CCK-8 assay was used to investigate difference in cellular proliferation rate over 24h between the groups. Flow cytometry was used to investigate the influence of heat stress on the phagocytosis of KCs. Results Compared to the normal control group, cells in each heat stress group exhibited varying degrees of damage, especially cells in 43℃ group. The ratio of damage cells increased with the increase of heat stress severity (P<0.05). Proliferation assay indicated that the proliferation rate of cells in each heat stress group was significantly decreased in comparison with normal control group 6h after heat stress (P<0.05). After 12h recovery, decrease in proliferation rate was observed only in 43℃ group (P<0.001), and no difference in the rate of proliferation could be observed between the heat stress groups and normal control group after 24h recovery. Flow cytometry showed, that the phagocytosis of KCs decreased in heat stress groups compared with control group, especially in 43℃ group (P<0.05). This phenomenon disappeared after 24h recovery. Conclusion Heat stress can inhibit the phagocytosis of rat liver KCs through its cytotoxic effect on KCs, and subsequently inhibits its proliferative ability. Further investigation of the effect of heat stress on KCs may help understand the pathogenesis of heat stress.

Objective To examine the different effects of impulsive and aggressive personality on college students' suicide attempt. Methods Four thousand nine hundred eighteen sophomores and juniors were selected according to the principle of cluster sampling from Beijing agricultural university and Beijing university of information science and tech?nology. Four thousand seven hundred ninety-seven of them completed the survey. Their impulsive and aggressive person?ality were evaluated by the Barratt Impulsiveness Scale-Chinese Versions (BIS-CV) and the Buss-Perry Aggression Questionnaire-Chinese Versions (AQ-CV). A self-made questionnaire were used to investigate suicidal idea and self-in?jury/suicidal behavior of college students. Results Among the sophomores and juniors, 18 participants had self-injury/suicidal behavior (3.75‰) and 1843 had suicidal idea (38.42%). Compared with the students who didn’t have self-inju?ry/suicidal behavior, those who once had self-injury/suicidal behavior had significantly higher BIS-CV score (P<0.01) and higher scores of non-planning and motor factors (P<0.05). They also had significantly higher score in AQ-CV and the factors of physical aggression, verbal aggression, anger, hostility and pointing to the self attacks (P<0.01). Conclu? sions The college students with self-injury/suicidal behavior have higher tendency in impulsive and aggressive personali?ty. Therefore, it is necessary to prevent suicide behavior, form high impulsive and aggressive intention and behavior.

Objective To prepare mouse model with heat stress and determine its pathological changes of the lung and brain during heat stress. Methods BALB/c mouse were randomly (random number) divided into two groups, control group and heat stress group. The animals in the control group were sham- heated at a temperature of ( 25 ± 0.5) ℃ and humidity of (35 ± 5 ) %. The animals of heat stress group were placed in a prewarmed incubator maintained at (35.5 ± 0.5) ℃ and relative humidity of (60 ± 5) %. Rectal temperature (Tc) was monitored, and when Tc respectively reached 39 ℃, 40 ℃ , 41 ℃ and 42 ℃, those study animals were killed. The other animals were removed from the incubator and allowed to cool at an ambient temperature of (25 ±0. 5)℃ and humidity of (35 ±5)% , respectirvely for 12 and 24 hrs when Tc reached 41 ℃ , and for 6 hrs when Tc reached 42 ℃. The lung and brain of all the animals were isolated. Hematoxylin and eosin stain and light microscope were used to detect their pathological changes. Results All the animals displayed uniform response to the heat stress. Low degree of heat stress could induced obviously pathological changes of the lung, progressively greater damage to lung with further congestion of lung matrix, asystematic hemorrhage of alveolar space, abscission of alveolar epithelial cell and disappear of pulmonary alveolus tissue structure were detected with the rise of Tc to 42 ℃. However, absorption of congestion and hemorrhage and recovery of pulmonary alveolus tissue structure could also be seen with cooling at ambient temperature. With low degree of heat stress, the brain only showed moderate edema. Neuronal denaturation and necrosis were detected when Tc reached to 42 ℃. Interestingly, the lesions of brain further aggravated even through cooling treatment after Tc reached to 42 ℃ , but recovery could been observed after cooling treatment followed with Tc of 41 ℃. Conclusions The pathological changes of the lung and brain showed distinctive lesions to heat stress and cooling treatment, and these changes were correlated with the timing and time of cooling treatment, which provide the experimental basis to further study the mechanisms between the heatstroke and multiple organ dysfunction syndrome (MODS).

Objective To analyze CT and MR features of malignant peripheral nerve sheath tumor (MPNST)of children. Methods Sixteen patients with histologically proven MPNST were retrospectively reviewed.There were 8 male and 8 female, ages from 0.3 to 11.0 years, and median age was 2.5 years. Sixteen cases were performed with CT plain scan, and eight cases with CT enhancement scans, and three with MR examination. The imaging data were analyzed by two highly experienced doctors and obtained agreements after mutual consultation. Results Among 16 cases, 3 cases were located at neck, 5 cases at waist and back,3 cases at abdominal and pelvic, 2 cases at foot, 1 case at left clavicle, 1 case at right mediastinum, 1 case at right orbit. Fifteen cases appeared as solid masses and 1 case showed a diffuse growth. CT plain scan showed 8 cases were solid-appearing masses and 7 cases were cystic-solid mass. Enhanced CT showed enhancement of solid component was moderate to marked and gradually delayed enhanced while cystic component had no any enhancement. One was located on the left side of the neck and appeared as diffuse growth. Two cases of solid mass type appeared as hypo-intensity on T1WI and hyper-intensity on T2WI, and obviously high signal intensity of cystic component on T2WI, and with significantly heterogeneous enhanced.One case with diffuse growth appeared as hypo-intensity on T1WI and slightly hyper-intensity on T2WI, and with significantly enhanced. Sixteen cases appeared as invasive growth, 11 caseswith multiple organic metastases and recurrences, and 4 cases with neurofibromatosis type I and scoliosis.Conclusion CT and MR appearances of MPNST have certain characteristic features, and can demonstrateaggressive performance and multiple organic metastases, which is helpful for definite diagnosis and treatment plan.

Objective To study the change of the contractile response of human umbilical artery smooth muscle cells (HUASMCs) during the heat stress, and explore the effect of the antioxidant on the changes. Methods HUASMCs were randomly divided into control group, heat stress group, antioxidant preprocessing group. Cells were stimulated by norepinephrine (NE) at a low concentration (0.05mg/L) and at a normal concentration (1.0mg/L) and cultured in the thermostatic water bath (41℃) for 0.5, 1, 1.5 or 2h, respectively. After stimulated by NE, proportion of the cell surface area contraction was measured to reflect the contractile response of each group. Results Compared with control group, regardless of the NE concentration: in heat stress group, contractile response at 1h increased significantly (P<0.05), while at 2h, it was reduced significantly (P<0.05 or 0.01). In the antioxidant preprocessing group, the contractile response was reduced significantly from heat stress to 2h after heat stress (P<0.05 or 0.01). There was no statistically significant difference in contractile response between different NE concentrations in the control group and heat stress group (P>0.05), but in the antioxidant preprocessing group, the contractile response was more significant to the normal NE concentration than to the low NE concentration (P<0.05 or 0.01). Regardless of the NE concentration, the contractile response was lower in the antioxidant preprocessing group than in the heat stress group. Conclusions In the course of heat stress, the contractile response of HUASMCs presents as time-related change. The usage of antioxidant may correct the over-response of HUASMCs to NE in the early heat stress stage, but cannot correct the reduction of the contractile response in the middle and advanced stage.

With the global warming, the incidence of heat stroke was significantly higher than before. Severe heat stroke has a high mortality, high morbidity and consolidated central nervous system injury characteristics. The main features of severe heat stroke cerebral injury include cognitive impairment, delirium, convulsions and coma. Its mechanism is related with heat shock induced cerebral tissue ischemia and hypoxia, vascular dysfunction, secondary cascade inflammation and so on. Currently, the main treatment of heat stroke cerebral injury is the hypothermia therapy, dehydration for the reduction of intracranial pressure, naloxone and other cerebral protection and nutrition treatments. Hyperbaric oxygen therapy (HBOT) is effective in treating brain injury. HBOT can alleviate tissue ischemia and hypoxia, improve circulation, reduce cerebral edema, and anti-inflammatory, anti-oxidative damage, anti-apoptosis and other molecular biological effects. HBOT also play a wake up-promoting effect of nerve repair in the cerebral injury. The treatment of cerebral injury has been the difficulty and weakness of heat stroke research. Therefore, this article reviewed the epidemiology, pathogenesis, the therapeutic effect and mechanism of hyperbaric oxygen on cerebral injury in severe heat stroke to clarify the advantages of HBOT and to provide experimental basis for further research.

Objective To investigate the protective effect of heat shock protein (HSP) 70 on the acute lung injury (ALI) of rats with heat stroke.Methods Sixty four rats were randomly (by employing a random number table) assigned into a sham-heated group (Sham group),heat stress group (HS group),and HS plus gluttamine treatment group (HS+GLN group) and HS plus quercet in treatment group (HS+QU group),16 each.All rats were housed in a artificial climate chamber,with the rats in the sham groups exposed to a temperature of 23 ℃ and humidity of 55％ ± 5％,while the rats of HS,HS+GLN and HS+QU groups to an ambient temperature of 39 ℃ and humidity of 65％.During heat stress or sham heating,rectal temperature (Tr),systolic blood pressure (SBP) and pulse rate (PR) were monitored to observe the difference in heat stress response among the groups.The time point at which the SBP started to drop from the peak level was taken as the point of HS onset.At the onset of HS,heat exposure was terminated,then the rats were immediately removed from the chamber,and returned to room temperature.The rats were scarified 0h and 6h after HS onset respectively.After bronchoalveolar lavage fluid (BALF) was collected,the lungs of all animals were harvested for pathological examination of lung injury.The concentrations of IL-1β,TNF-α and IL-6 in BALF and HSP70 in lung homogenate were measured by using an enzyme linked immunosorbent assay kit.Results Compared with HS and HS+QU groups,the rats in HS+GLN group required significantly greater heat load to induce HS (P＜0.001),and had longer survival time span after HS onset.Compared with Sham group,the concentration of HSP70 in lung homogenate in HS group increased in a time-dependent manner (P＜0.001).In comparison with HS group,the concentration of HSP70 in lung homogenate from HS+GLN group was significantly elevated at each time point (P＜0.001),while the treatment with QU significantly inhibited the expression of HSP70 (P＜0.001).The concentration of IL-1β,TNF-α and IL-6 in BALF significantly decreased in HS+GLN group compared with those in HS group and HS+QU group (P＜0.001).The pathological results showed that the lung injury was milder in HS+GLN group,while the opposite in HS+QU group.Conclusion HSP70 could protect HS rats against ALI by enhancing their thermo-tolerance and inhibiting inflammatory response.