OBJECTIVE: To explore the correlation between postmortem interval (PMI) and five RNA markers of rat's skin--β-actin, glyceraldehyde-3-phosphate dehydrogenase (GAPDH), 18S ribosomal RNA(18S rRNA), 5S ribosomal RNA (5S rRNA), and microRNA-203 (miR-203), at different temperatures. METHODS: Eighteen SD rats were randomly divided into three environmental temperature groups: 4 °C, 15 °C and 35 °C, respectively. Skin samples were taken at 11 time points from 0 h to 120 h post-mortem. The total RNA was extracted from the skin samples and the five RNA levels were detected by real-time fluorescent quantitative PCR. Proper internal reference was selected by geNorm software. Regression analysis of the RNA markers was conducted by GraphPad software. RESULTS: 5S rRNA and miR-203 were most suitable internal references. A good linear relationship between PMI and RNA levels (β-actin and GAPDH) was observed in two groups (4 °C and 15 °C), whereas the S type curve relationship between the expression levels of the two markers (β-actin and GAPDH) and PMI was observed in the 35 °C group. The partial linear relationship between 18S rRNA and PMI was observed in the groups (15 °C and 35 °C). CONCLUSION Skin could be a suitable material for extracting RNA. The RNA expression levels of β-actin and GAPDH correlate well with PMI, and these RNA markers of skin tissue could be additional indice for the estimation of PMI.
Actins ; Animals ; Autopsy ; Glyceraldehyde-3-Phosphate Dehydrogenases/genetics* ; Postmortem Changes ; RNA ; RNA Stability ; RNA, Ribosomal, 18S ; Rats ; Real-Time Polymerase Chain Reaction ; Regression Analysis ; Skin ; Temperature

Objective To investigate the imaging features of gastrointestinal stromal tumors (GIST) and its diagnostic value. Methods The clinical and imaging data of 41 patients with GIST proved by operation and pathology were analysed. Results Tumors located in the stomach in 20 cases, small bowel in 5 cases, rectum in 3 cases, esophagus in 2 cases and extra gastrointestinal sites in 11 cases. There were 27 malignant GIST diagnosed by imageologic examination,of them, 21 mass exceeded 5 cm in diameter, margins were vague, 19 cases had obvious adhesion or directly involved with around tissue,13 cases with obvious necrosis and cystic changes within the mass. 5 cases with metastase focus.Benign GIST in 14 cases, 11 cases were less than 5 cm in diameter, most of them had smooth margin,homogeneous density and symmetrical enhancement effect.Conclusion X-ray gastrointestinal double contrast radiography examination finds easily inside antrum and inside-and-outside antrum type GIST; CT examination offsets deficiency of general gastrointestinal radiography. It is valuable in localizing precisely, judging benign and malignantin, guiding clinical therapy and estimating prognosis for GIST.

ObjectiveTo investigate the resistance character and trend of bacteria strains producing extend spectrum β-lactamase (ESBLs) in clinic.MethodsThe ESBLs-producting K. pneumoniae and E.coli producing ESBLs isolated from Apr 2001 to Mar 2004 in our hospital were screened and confirmed according to NCCLs method.ResultsK. pneumoniae and E.coli with the ESBLs phenotype were increased in recent 3 years with the resistance rate and Gm(MIC) also higher than that not producing ESBLs.ConclusionThe dection of bacteria strains producing ESBLs will be enhanced in order to provide reasonable treatment information.

Abstract: Objective　To investigate the clinical characteristics of silicosis complicated with active pulmonary tuberculosis. Methods A retrospective analysis of 36 patients with silicotuberculosis and 100 patients with active pulmonary tuberculosis was performed from January 2018 to December 2021 at Beijing Chest Hospital，Capital Medical University. The patients were confirmed by etiology or pathology. The patients with silicotuberculosis were designed to observation group and the patients with active pulmonary tuberculosis were designed to control group. The enumeration data were expressed as percentage and were treated with the chi-square test and the nonnormal distribution data is expressed as M(P25, P75). The difference was significant with P<0.05. Results　In the observation group, there were 7 cases (19.4%) of silicosis in stage Ⅰ, 14 cases (38.9%) in stage Ⅱ and 15 cases (41.7%) in stage Ⅲ. 25 cases (69.4%, χ2=17.099) had a course of TB more than 12 months. 32 cases (88.9%, χ2=16.722) with cough, expectoration and dyspnea as the main symptoms. 32 cases (88.9%, χ2=16.722) had nodular lesions, and 30 cases (83.3%, χ2=19.900) had mediastinal and hilar lymphadenopathy as the main imaging manifestations on chest CT. 17 cases (47.2%, χ2=7.481) were misdiagnosed. Compared with the control group, the difference was significant in these aspects (P<0.05). 27 cases in the observation group were followed up, 1 case died after 5 months of treatment. The negative conversion time of Mycobacteria growth indicator tube (MGIT) liquid culture in sputum was within 2 months in 17 cases (65.4%), between 2 and 12 months in 5 cases (19.2%) and over 12 months in 4 cases (15.4%), and a significant difference was observed comparing with the control group (P<0.05). Conclusions　The patients with silicotuberculosis are mainly in stage Ⅱ and stage Ⅲ with long duration of TB, cough, expectoration and dyspnea as the main symptoms. Chest CT shows that nodules, mediastinal and hilar lymphadenopathy are the main imaging manifestations. And the silicotuberculosis was easily misdiagnosed. At the same time, screening for latent tuberculosis infection in silicosis patients indispensable due to the poor prognosis of anti-tuberculosis treatment.

OBJECTIVETo study the relationship between Chinese medical syndrome types and metabolomics of non-small cell lung cancer (NSCLC) patients.

METHODSTotally 120 NSCLC patients were assigned to asthenia syndrome group and sthenia syndrome group, 60 in each group. Meanwhile, 60 cases of benign pulmonary nodules in physical examinations were recruited as the control group. Tumor tissues or benign pulmonary nodules tissues were obtained by thoracoscope. Changes of their metabolites were observed using gas chromatography-mass spectrometry (GC-MS). Their differences were studied using principal component analysis (PCA) and partial least-squares discriminant analysis (PLS-DA). ROC curve analysis was performed in different metabolic compounds of sthenia and asthenia syndromes groups. The area under the curve (AUC) was calculated to evaluate the sensitivity of diagnosing syndrome types.

RESULTSCompared with the control group, difference existed in 16 compounds. Of them , contents of citric acid, pyruvic acid, alanine, choline phosphate, glycerol phosphate choline, linoleic acid, oleic acid, lactic acid, inositol were more in the two tumors group than in the control group. Difference existed in 10 compounds between the sthenia syndrome group and the asthenia syndrome group. Of them, citric acid, pyruvic acid, alanine, choline phosphate, glycerol phosphate choline, lactic acid, and inositol were more in the asthenia syndrome group than in the sthenia syndrome group. Contents of valine, glucose, and glutamine were more in the sthenia syndrome group than in the asthenia syndrome group. ROC curve analyses of different compounds indicated that AUC of lactic acid and glucose was more than 0.8 (P < 0.01); AUC of inositol, choline phosphate, and glycerol phosphate choline was more than 0.7 (P < 0.01); AUC of valine, citric acid, glutamine, alanine, and pyruvic acid was more than 0.6 (P < 0.05).

CONCLUSIONSThere existed certain correlation between CM syndrome types and metabolomics of lung cancer. Lactic acid, glucose, inositol, choline phosphate, glycerol phosphate choline, valine, citric acid, glutamine, alanine, pyruvic acid were sensitive diagnostic compounds, and the first four kinds were most sensitive compounds.

Asian Continental Ancestry Group ; Carcinoma, Non-Small-Cell Lung ; metabolism ; Gas Chromatography-Mass Spectrometry ; Humans ; Lactic Acid ; Least-Squares Analysis ; Metabolomics ; methods ; Principal Component Analysis ; Pyruvic Acid

BACKGROUND:Heart valve surgery combined with coronary artery bypass grafting has been gradual y used for treatment of coronary heart disease combined with cardiac valve disease.
OBJECTIVE:To retrospectively summarize the experience of combined coronary artery bypass grafting and valvular procedure.
METHODS:Total y 51 patients who underwent combined heart valve surgery and coronary artery bypass grafting were retrospectively analyzed, including 10 cases with aortic valve replacement, 14 cases with mitral valve replacement, eight cases with mitral valve replacement combined with tricuspid annuloplasty, four cases with aortic valve and mitral valve replacement, three cases with aortic valve and mitral valve replacement combined with tricuspid annuloplasty, seven cases with mitral valvuloplasty, and five cases with mitral valvuloplasty combined with tricuspid annuloplasty.
RESULTS AND CONCLUSION:Biovalve replacement was performed in nine patients, mechanical valves replacement in 31 cases, mitral valvuloplasty in 11 cases and tricuspid annuloplasty in 16 cases. There were total y 109 bypass graft vessels, and the average number of coronary artery bypass grafts was (1.92±0.73) branches. Four cases died within 30 days postoperatively, and 47 patients were successful y discharged from the hospital. Forty-five of 47 discharging patients were fol owed for 3-48 months. One case died of cerebral infarction within 6 months postoperatively, and another case died of cardiac dysfunction over 1 year after operation. The heart function of 45 survival patients was significantly improved. The comprehensive analysis showed that improving the heart function preoperatively, strengthening myocardial protection, shortening operation and myocardial ischemia time, and complete revascularization are the key factors for successful operation.

BACKGROUND: Apoptosis secondary to ischemia and hypoxia is the main cause of spinal cord dysfunction. Because of the decrease in atmospheric pressure, patients living on the Qinghai-Tibet Plateau are in a hypoxic environment, which is very unfavorable for the recovery of spinal cord injury. Hyperbaric oxygen therapy can improve the postoperative function of patients with incomplete spinal cord injury, and its effect is better on the plateau than at normal altitudes.OBJECTIVE: To observe the effect of hyperbaric oxygen therapy on traumatic spinal cord injury in patients living on the Qinghai–Tibet Plateau.METHODS: This prospective, open-label, randomized controlled clinical trial was performed at the Department of Spine Surgery, Affiliated Hospital of Qinghai University, China. In total, 164 patients with incomplete traumatic spinal cord injury were equally and randomly assigned to a control group and a hyperbaric oxygen therapy group. Patients in the control group were treated with pedicle screw fixation and decompressive laminectomy. In addition to the surgical treatment performed in the control group, patients in the hyperbaric oxygen group underwent hyperbaric oxygen therapy at 0.2 MPa once a day for four treatment courses. Ten treatment sessions constituted one course, and each course was separated by a 5- to 7-day rest interval. The primary outcome was the modified Barthel index to assess activities of daily living. The secondary outcomes were the American Spinal Injury Association (ASIA) impairment scale grade, sensory score, and motor score. The study protocol was approved by the Ethics Committee of the Affiliated Hospital of Qinghai University, China (Approval number: QHC011K). Written informed consent was provided by a relative or legal representative of each patient after they had indicated that they fully understood the treatment plan. RESULTS AND CONCLUSION: The partial results demonstrated that after four treatment courses (55-61 days), the modified Barthel index and ASIA tactile, pain, and motor scores were higher in the hyperbaric oxygen group than in the control group. The ASIA grades were significantly different between the hyperbaric oxygen group and control group. The proportion of patients with ASIA grades D and E was higher in the hyperbaric oxygen group than in the control group. In this trial, we aim to determine the efficacy of hyperbaric oxygen therapy on the treatment of incomplete traumatic spinal cord injury in patients living on the plateau and to provide clinical evidence for treating incomplete traumatic spinal cord injury in these patients.

The antioxidant activity of lycopene is highest among the current carotenoids.Recently the researches on lycopene are focused on ingredient of functional foods in the world.The fermentation production of lycopene by Streptomyces rimosus was reported first time in China.The determination methods,such as spectrophotometric method and HPLC were constructed.Using a stain Fc of Streptomyces rimosus as a original strain,a high-yield lycopene producing mutant strain Fc' was selected after UV mutation.The lycopene yield of the strain is 2.5 times higher than the original strain Fc.The optimal fermentation conditions were determined by flask experiments,and the lycopene yield of strain Fc' reached 230mg/L in flask under the optimal fermentation condition,meanwhile the Streptomyces rimosus strain could produce purer lycopene without adding any blocking agents in its fermentation process.This results lay a good foundation for lycopene commercial production by fermentation using Streptomyces rimosus.

More than ten bacteriophage of E.coli were isolated from the soil and the dung of the fowl-run, then three of named bacteriophage A, C, D which lysis E.coli virulently were selected to investigate biological characterizations. The results showed that high activities were obtained after the phages incubated at 50℃ for 1 h or 60℃ for 30 min. The phages could be alive at the range of pH from 4 to 12, Ca 2+ or Mg 2+ added to the medium could stimulate the lysis of phages. However, the formation of the plaque could be inhibited obviously by adding sodium citrate to the medium.

Objective To assessed the distribution of two single nucleotide polymorphism (SNP)loci (rs2383206.rs10757278)on chromosome 9p21 in Xinjiang Uygur and Han nationality populations,and to investigate correlation and the incidence of all cases of macrovascular disease (coronary artery disease,carotid atherosclerosis and peripheral arterial disease)and analysis of risk factors.To further study the correlation between the incidence of two single nucleotide polymorphism (SNP)loci (rs2383206.rs10757278)on chromosome 9p21 in type 2 diabetes melli-tus(T2DM)of Han and Uygur ethnic and the incidence of all cases vascular disease,then to analysis the risk factors. Methods 497 adults with T2DM who were treated in the Endocrinology department in hospital from May 2012 to April 2014 were involved in this study,including 298 Uygur patients and 199 Han patients.215 non -T2DMpatients who were treated in the Cardiology department in hospital were also involved in the study,including 93 Uighur patients and 122 Han patients.Then the total 712 patients were detectedby using PCR -SNP Stream technology to analyse rs2383206.rs10757278 loci SNP genotyping.The relevant results were compared with t test,two different genotype distribution and allele frequency were compared with χ2 test,multiple factors analysis were calculated by Logisitic regression.Results The distribution of genotype with two SNP loci had no significant difference between the patients in Uygur group and Han group (rs2383206χ2 =5.570,P =0.062;rs10757278 χ2 =2.721,P =0.257 ),and there's no significant difference between the patients with macrovascular disease and non -macrovascular disease in all patients(rs2383206χ2 =0.120,P =0.950;rs10757278 χ2 =1.027,P =0.598).Logisitic regression analysis showed that the incidence of macrovascular was significantly associated with increasing age(χ2 =28.820,P =0.000)and fatty liver(χ2 =5.210,P =0.020)in Uighur group with type 2 DM.In Han group with type 2 DM,the macrovascular was significantly associated with the increase of age (χ2 =19.980,P =0.000),elevated fasting blood glucose (FPG)(χ2 =4.070,P =0.044)and poor controlled with glycosylated hemoglobin (χ2 =4.280,P =0.040). Conclusion This study found that there's no correlation between two single nucleotide polymorphisms (SNPS)loci (rs2383206.rs10757278)on chromosome 9 p21 large with macrovascular in Uygur group and Han group.Increasing age,higher FPG and poor controlled with glycosylated hemoglobin combined with fatty liver were the risk factors for macrovascular.