1.Relative tolerance of lung in murine model of acute graft-versus-host disease
Xiaoli XU ; Zhuowen CHEN ; Jingming LI ; Ping ZOU
Chinese Journal of Organ Transplantation 2016;37(7):427-432
Objective To analyze the immune privilege of lung in acute graft-versus-host disease (aGVHD).Methods The models of aGVHD were established,and C57BL/6J→C57BL/6J model was used as control.The clinical scores and survival were observe& The pathological injuries were compared between the lung and traditional target organs (liver,small intestines and skin).The expression of IFN-γ in different organs after transplantation was detected by ELISA.Results Allogeneic hematopoietic stem cell transplantation (HSCT) mice had high 42-day survival rate (20 %) post-transplantation,and recipients of allogeneic grafts showed classical symptoms and histological injury,and pathological changes of lung were not as serious as the liver,small intestine,skin at day 28 after transplantation.Syngeneic mice all survived at day 42 after transplantation,without GVHD symptoms and pathological changes.The mice in MHC-disparate mice (2 ∶ 1 and 4 ∶ 1 groups) died significantly faster at a median of 12 days after transplantation,with severe changes of clinical symptoms and pathology of classical organs,and MHC-disparate mice (4∶1 groups) had developed severe interstitial pneumonitis.The mean IFN-γ concentration in the lung of allogeneic HSCT mice was obviously increased in the first and second week after transplantation,the IFN-γ concentrations of target organs (liver,small intestines,skin) were slightly increased in the first and second week after transplantation,and there were statistically significant difference from lung (P<0.05).Condmion There wasrelativeimmune privilege of lung in a murine model of aGVHD induced by HSCT,which was associated with the expression of MHCin the mice and IFN-gamma of lungs after transplantation.
2.Clinical analysis of malignant hematological disease combined with septicemia
Haiyan YE ; Zhuowen CHEN ; Kuihai WU ; Shanwei DENG
Chinese Journal of Postgraduates of Medicine 2014;37(16):27-31
Objective To study the clinical characteristics,pathogens,drug sensitivity and prevention measures in malignant hematological disease combined with septicemia.Methods The clinical data of 95 malignant hematological disease combined with septicemia patients from January 2009 to June 2013 were retrospectively analyzed.Results One hundred and ten episodes of septicemia occurred in all the 95 patients,among which acute leukemia patients accounted for 69.1% (76/110),patients with neutrophil counts <0.5 × 109/L accounted for 82.7% (91/110),and patients with agranulocytosis time >7 days accounted for 66.4%(73/110).Major pathogenic bacteria was gram negative bacteria,including Escherichia coli 30.9%(34/110),Klebsiella pneumoniae (14.5%,16/110),Pseudomonas aeruginosa (12.7%,14/110).Carbapenems and amikacin was the most sensitive in susceptibility testing.Ninety-eight episodes of septicemia cured or improved,and 12 patients died,with a mortality of 12.6% (12/95).Fifteen patients had septic shock,of whom 7 patients were dead.Conclusions Septicemia is very serious for malignant hematological patients,which may lead to rapidly progress,high incidence to septic shock and high mortality.Early prevention and treatment is important for patients,and strong anti-infection and supportive treatment is needed.
3.Exploring occupational hazards and protective strategies in power generation enterprises
Xian LI ; Xiao HOU ; Linzheng ZHANG ; Fei YAN ; Shufan CHANG ; Zhuowen WANG ; Yang CHEN ; Wei WANG
China Occupational Medicine 2023;50(2):235-241
Currently, power generation in China is dominated by thermal power, wind power, nuclear power, and hydropower enterprises. The power source mainly comes from thermal power generation. The occupational hazards in thermal power station are noise, high temperature, power frequency electric fields, dust, and chemical toxins and so on, with noise and dust (silica and coal dust) being the primary factors. The occupational hazards in wind power station are noise, power frequency electric fields, high temperature, low temperature, and chemical toxins (sulfur hexafluoride, toluene, styrene, etc.), with noise and power frequency electric fields being the major concerns. The occupational radiation hazards in nuclear power station are gamma rays, beta rays, X-rays, neutrons, alpha rays, and radioactive aerosols. There is special attention in radiation protection but not enough protection in non-radioactive hazards such as noise, high temperature, and ammonia. The occupational hazards in hydropower station are noise, power frequency electric fields, vibration, radon and its de-composites, and chemical toxins, with noise and power frequency electric fields being the primary hazards. Different categories of power generation enterprises should identify key hazards and work site for occupational disease prevention and control based on the features of occupational hazards. Improving occupational health management and protection levels are essential measures.
4.Clinical effect of polymer-free sirolimus-eluting Nano stent on patients with coronary artery stenosis
Xinjun CHEN ; Ruolong ZHEN ; Fengjiao HUANG ; Zengxin YANG ; Zhuowen XU ; Weizhang LI ; Hua ZHANG
The Journal of Practical Medicine 2018;34(12):2042-2045
Objective To study the safety and effectiveness of polymer-free sirolimus-eluting Nano stent in patients with unstable angina pectoris. Methods Three hundred and twenty-one patients with unstable angina pectoris were divided into Nano stent group(group A,n=157)and Endeavor resolute stent group(group B,n=164). The cardiovascular events were compared postoperative 12 months. The minimal intima cavity area and mini-mum bracket section area and neointimal area were compared postoperative 12 months by intravascular unltrasound (IVUS). Results There were 7 cases of cardiovascular events in group A and 6 in group B postoperative 12 months(P=0.727)and 2 patients in group A and 3 in group B were re-implanted stent because of restenosis post-operative 12 months(P=0.672). The neointimal area were(0.31 ± 0.11 mm2)in group A and(0.29 ± 0.12 mm2) in group B postoperative 12 months(P = 0.985). The minimal intima cavity area(P = 0.921)and the minimum bracket section area(P=0.934)were narrower postoperative 12 months than immediately after the operation in two groups. Conclusion With less cardiovascular events and being safe and reliable,the clinical effect of polymer-free sirolimus-eluting Nano stent implantation is similar to that of Endeavor resolute stent implantation.