Diagnostic Errors ; Female ; Humans ; Infant, Newborn ; Inhalation ; Male ; Organophosphate Poisoning ; Poisoning ; diagnosis

Adult ; Diagnosis, Differential ; Female ; Humans ; Keratins ; metabolism ; Lymphatic Metastasis ; Mucin-1 ; metabolism ; Rectal Neoplasms ; metabolism ; pathology ; surgery ; Rhabdoid Tumor ; metabolism ; pathology ; surgery ; Sarcoma ; metabolism ; pathology ; Synaptophysin ; metabolism ; Vimentin ; metabolism ; Young Adult

Abstract: The coronavirus disease 2019 (COVID-19) has become a global public health problem due to its highly contagious nature. This article aims to discuss the current situation of traditional Chinese medicine in the prevention and treatment of COVID-19, and to provide a basis for traditional Chinese medicine research and scientific and standardized treatment of COVID-19.In this article, the etiology, pathogenesis, treatment plan and research progress were summarized, analyzed and concluded by retrieving and reviewing the literature and clinical reports related to the prevention and treatment of COVID-19 with traditional Chinese medicine. Traditional Chinese medicine has obvious effects in the prevention and treatment of COVID-19, improvement of clinical symptoms, and control of disease progression, which had the unique advantages of mild curative efficacy and safety. It has important practical significance in relieving patients' early symptoms and reducing the incidence of progression from mild to severe, and had great potential for development in the treatment of COVID-19. The traditional Chinese medicine intervention and the formulation of diagnosis and treatment plans for the COVID-19 need to be continuously optimized and improved. Scientific and rational application of traditional Chinese medicine to prevent and treat COVID-19, optimization diagnosis and treatment programs, and in-depth exploration of pharmacological mechanisms, especially the provide reference for early intervention of new coronavirus pneumonia by traditional Chinese medicine, the control of disease progression in the middle stage, and improve prognosis in the late stage with Western medicine.

Objective To clone and express specific genes (YP01089,psi.ymt) from Yersinia pestis in Escherichia Coli(E.coli)and to analyze the antigenicity of these recombinant proteins.Methods The target genes were amplified by polymerose chmn reaction(PCR).The amplified products were ligated with pET-30a(+) vector after purification and cut by two different restriction enzymes,then these recombinant plasmids were transfefred into the host cells of E.coli BL21(DE3) strain.The target genes were successfully expressed following induction with Isopropyithio-β-D-galactoside(IPTG),and the target proteins were purified by the method of affinity chromatography.Sodium dodecyl sulfate-polyaerylamide gel eleetrophoresis(SDS-PAGE)and Westem blot were used to detect the expressed recombinant protein.Results Three recombinant plasmids were finally constructed. rYP01089,rPst and rYmt were expressed stably and effectively in E.coli thmngh optimizing the induction condition. The Western blot analysis indicated that rPst was capable of binding with positive sernm of phgue.The purity of rest was up to 95%in this stuay.Conclusions This work indicates that the genes of Yersinia pestis are able to be efficiently expressed in the prokaryotie protein expression system.The immune characteristic of rPst is sensitive and specific,80 this study has settled a foundation for developing a new type diagnostic reagent of plague.

Objective To observe the effects of culture medium of a mn iotic cells on NO and NOS in retinal tissues of rabbits in vitro in order to pro vide a protective method for antioxidation in retina transplantation. M ethods Thirty adult healthy rabbits (30 right eyes) were divided into 3 groups. Group Ⅰ: fresh retinal tissue; group Ⅱ: routine culture medium; group Ⅲ: culture medium of amniotic cells. The retinal tissues in group Ⅱ and Ⅲ we re cultured in the corresponding culture medium for 1 week. The content of NO an d NOS in retinal tissues in the 3 groups were determined. Results Compared with group I, the content of NO and NOS of group Ⅱ increased obvio usly (t=3.821, 3.854; P0.05) . Conclusion Culture medium of amniotic cells may remove free r adicals and enhance the ability of antioxidation.

Background and purpose:Vascular endothelial growth factor(VEGF) is a potent angiogenic mediator and angiogenesis has important effects on tumor growth and metastasis.The present study was to investigate the relationship between genetic polymorphism of VEGF and heredity risk factor of lung cancer.Methods:VEGF genotypes were determined by PCR-RFLP method in 171 patients with lung cancer and 172 healthy controls.Software PHASE 1.0 was used to construct the haplotypes of every individual.Unconditional logistic regression model was used to analyze the statistical association of genotypes or haplotypes in the two groups adjusted by gender and age. Results:Individuals with at least one-2578A allele had a significantly decreased risk of lung cancer compared with those carrying-2578CC genotype.When the analyses were stratified by gender,the combined-2578 CA and AA genotype,were associated with a considerably reduced risk of lung cancer(P=0.001,OR=0.303,95%CI=0.15 3-0.601).The distribution of the two haplotypes(936C/-2578C and 936C/-2578A) among overall lung cancer cases was significantly different from that among the controls(P=0.016,0R=0.317,95%CI=0.124-0.809 and P=0.018,OR=0.547, 95%CI=0.331-0.903).When the cases were categorized by tumor histology,the distribution of C-C haplotype in the adenocarcinoma(AC) group was associated with a substantially lowered risk of AC(P=0.004,0R=0.237,95%CI=0.090- 0.627),compared with the reference haplotypes.Conclusion:VEGF polymorphism may be a critical risk for the genetic risk factor to lung cancer.

Objective To study the three-dimensional topography of the hepatic vein(HV),the inferior vena cava(IVC)and the inferior right hepatic vein(IRHV)in the retrohepatic and pre-IVC tunnel in human beings,and to provide an anatomic reference for liver surgery.Methods One hundred and ten volunteers underwent CT scanning at 60 to 75 s after injection of contrast medium,and their HV,IVC and IRHV were reconstructed into MPR and 3D-MIP images.The hepatic veins were grouped according to the way by which the hepatic vein enters IVC.The angle between the right hepatic vein and the middle hepatic vein or the trunk of hepatic vein was measured,and the width from right hepatic vein to middle hepatic vein or to the trunk of hepatic vein on IVC was recorded.The frequency of IRHV was observed,and the length of the tunnel was measured.Results Among the 110 volunteers,there were 6 cases(5.45%)with three hepatic veins respectively entering IVC,98 cases(89.10%)with right hepatic vein and a common trunk of the middle hepatic vein and the left hepatic vein entering IVC,and 6 cases(5.45%)with left hepatic vein and a common trunk of the right hepatic vein and the middle hepatic vein entering IVC.The mean value of the angles between the right hepatic vein and the middle hepatic vein or the trunk of hepatic vein was(55? 18)?.The width from the fight hepatic vein to the middle hepatic vein or to the trunk of hepatic vein was (21?7)mm.The IRHV was observed in 30 cases(27.27%).The mean value of the tunnel length was (53?11)mm.Conclusion The parameters of the retrohepatic and pre-IVC tunnel in human beings can be measured accurately by the imaging of MPR,which can provide an anatomic reference for the liver surgery.

BACKGROUNDAlthough three-dimensional MRI (3D-MRI) of short T1 inversion recovery turbo spin-echo (STIR TSE) has showed superior to two-dimensional MRI (2D-MRI) in showing the spinal cord and lumbar nerve roots, it remains difficult in demonstrating radicular vein at present. We have found that short T1 inversion recovery long time echo (STIR LONG TE) was better in showing radicular vein. To further study the methods and character of the 3D-MRI of lumbar nerve root, ganglions and radicular vein in normal and lumbar disc herniation (LDH) adults, in the present study, we evaluated two 3D-MRI techniques, STIR TSE and STIR LONG TE for demonstrating lumbar nerve roots and especial radicular vein in normal and LDH adults.

METHODSTwelve normal adult persons and 19 LDH patients were included in this study; special oblique coronal location was adopted. STIR TSE and STIR LONG TE were performed in all participants, and the detection rates of radicular vein and nerve root of L3, L4, L5, S1 were calculated. The grading system was used in grading compromise of the intraspinal extradural lumbar nerve root, ganglion and radicular vein in LDH patients, and all the grading injury of nerve root, ganglion and radicular vein had been evaluated.

RESULTSThe definite rate of radicular vein (DRRV) of 3D-MRI of STIR LONG TE was significantly different from that of STIR TSE. DRRV of STIR LONG TE was L3, 91.7%, L4, 100%, L5, 100%, S1, 100% and that of STIR TSE was L3, 33.3%, L4, 37.5%, L5, 58.3%, S1, 45.8% in normal adults. It showed no difference between STIR LONG TE and STIR TSE in the detection rate of nerve root. The different patho-injuries of nerve root, ganglion and radicular vein could be seen in all LDH patients by the 3D-MRI of STIR LONG TE. The mean score of Japanese Orthopaedic Association (JOA) was 16.16, and 29 nerve roots were calculated in all the study. The mean grading injury of nerve root was 2.17, that of nerve root ganglion was 1.28, that of radicular vein was 1.83, and the mean co-grading injury of nerve root, ganglion and radicular vein was 5.31. The correlation coefficient was 0.478 (P = 0.010) between the score of JOA and that of radicular vein.

CONCLUSIONThe 3D-MRI of STIR LONG TE is superior to STIR TSE for not only detecting the lumbar nerve root, ganglion and especial radicular vein in normal adults, but also displaying their patho-injuries degree in LDH patients.

Adult ; Aged ; Female ; Humans ; Intervertebral Disc Displacement ; pathology ; Lumbar Vertebrae ; Magnetic Resonance Imaging ; methods ; Male ; Middle Aged ; Spinal Nerve Roots ; blood supply ; pathology ; Veins ; pathology

OBJECTIVETo explore the effects of lead on the thyroid function of occupationally exposed workers.

METHOD157 workers occupationally exposed to lead in a smelting factory were investigated. The concentration of lead in air at workshop was measured by flame atomic absorption spectrophotometry (FAAS) and the levels of blood lead (PbB) by atomic absorption spectrophotometry (AAS), zinc protoporphyrin (ZPP) by ZnPP meter, as well as the indexes of thyroid function, thyroid-stimulating hormone (TSH), triiodothyronine (T(3)), thyroxin (T(4)), free T(3) (FT(3)), and free T(4) (FT(4)) in serum by radioimmunoassay.

RESULTSThe workers with higher level of blood lead (> 2.88 micro mol/L) showed lower levels of T(3) [(1.54 +/- 0.39) nmol/L] and FT(3) [(5.50 +/- 1.26) pmol/L] than those with lower blood lead level [PbB: (1.92 approximately 2.88) micro mol/L group, T(3): (1.71 +/- 0.45) nmol/L, FT(3): (6.12 +/- 1.64) pmol/L, P < 0.05]. There was no obvious effect of length of service on thyroid hormone of exposed workers.

CONCLUSIONHigher level of blood lead may cause certain damage to thyroid function by inhibiting deiodination of T(4). No obvious relation between length of service and thyroid function was found.

Adult ; Female ; Humans ; Lead ; blood ; toxicity ; Male ; Middle Aged ; Occupational Exposure ; Thyroid Gland ; drug effects ; physiology