Adult ; Aged ; Female ; Humans ; Lymphoma ; pathology ; Male ; Middle Aged ; Retrospective Studies ; Splenic Neoplasms ; pathology

Abstract: Objective To explore the correlation between lung function in patients with chronic obstructive pulmonary disease (COPD) and tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β) levels in exhaled breath condensate (EBC), and to provide a convenient methodological basis for the diagnosis and treatment of COPD and the determination of its efficacy. Methods A total of 81 COPD patients and 40 healthy controls were selected from the respiratory department of the Fourth Affiliated Hospital of Guangzhou Medical University from August 2020 to February 2022 as the research subjects. The COPD patients were divided into 41 cases in the acute exacerbation group and 40 cases in the remission group according to their status. All participants underwent lung function detection, venous blood and EBC collection, and the levels of TNF-α and IL-1β in EBC and venous blood were analyzed by enzyme-linked immunosorbent assay (ELISA), and correlation analysis was performed by Pearson correlation analysis method. Results The levels of TNF-α and IL-1β in EBC of in the acute exacerbation group, the healthy control group, the remission group were (5.16±0.18) pg/μL and (7.75±0.27) pg/μL, (2.66±0.31) pg/μL and (2.41±0.24） pg/μL, (3.61±0.29) pg/μL and (3.17±0.38) pg/μL, respectively. Compared with the healthy control group, the levels of TNF-α and IL-1β in EBC in the COPD acute exacerbation group were significantly higher than those in the healthy control group and the COPD remission group (F=9.451, 8.217, P<0.001). Serum tests were consistent with this result. Correlation analysis showed that the levels of TNF-α and IL-1β in EBC were significantly positively correlated with the level of serum inflammation levels (P<0.001), while significantly negatively correlated with lung function (P<0.001).  Conclusions TNF-α and IL-1β in EBC are potential biomarkers of inflammation in patients with COPD, and their detection can be used to effectively assess lung function in patients with COPD. 

The finite element method (FEM) is a mathematical technique using modern computer technology for stress analysis, and has been gradually used in simulating human body structures in the biomechanical field, especially more widely used in the research of thoracolumbar spine traumatology. This paper reviews the establishment of the thoracolumbar spine FEM, the verification of the FEM, and the thoracolumbar spine FEM research status in different fields, and discusses its prospects and values in forensic thoracolumbar traumatology.
Biomechanical Phenomena ; Computer Simulation ; Finite Element Analysis ; Humans ; Lumbar Vertebrae/injuries* ; Models, Theoretical ; Stress, Mechanical ; Thoracic Vertebrae/injuries* ; Traumatology

OBJECTIVETo observe the regulating effect of hepatitis C virus (HCV) envelop (E) 2 gene immunization-induced immune responses by adenovirus mediated interleukin 12 (IL-12).

METHODSHCV E2 protein was expressed and purified from NIH 3T3 and then used as an antigen to detect antibodies against HCV E2. With 51Cr release, SP2/0 expressing HCV E2 was used as target cell to detect specific cytotoxic T lymphocytes (CTL) response; adenovirus recombined IL-12 was propagated by 293 cell. HCV E2 recombinant and adenovirus recombined IL-12 were injected into the quadriceps femoris muscles and abdominal cavities of 6-8 weeks old BALB/C mice. Sera were collected at 2, 3, and 4 weeks and detected for antibodies for E2. Spleen cells isolated at 4 weeks were analyzed for specific CTL response.

RESULTSIt was found that expression of IL-12 at an undetectable level did enhance HCV E2 gene immunization-induced CTL activity and there was no effect on its hormonal immune response.

CONCLUSIONUsing adenovirus to express interleukin 12 was helpful for regulation of HCV E2 gene immunization-induced immune response. Combined HCV E2 and IL-12 can render a strong anti-HCV CTL activity and may be of use in the development of HCV gene vaccine in the future.

Adenoviridae ; physiology ; Interleukin-12 ; biosynthesis ; genetics ; T-Lymphocytes, Cytotoxic ; immunology ; Viral Envelope Proteins ; genetics ; immunology

Due to the irregular of diet and overfeeding greasy and surfeit flavor closely associated with hyperuricemia disease, the lipid emulsion containing high cholesterol was used to model. To obtain a more stable and sustained animal model for the efficacy evaluation of traditional Chinese herbs, we observed the influence on the serum uric acid of rat induced by the lipid emulsion compared with high purine diet. 36 SD male rats were randomized to the normal control group, high purine diet group and lipid emulsion group respectively. The general behavior, body weight and daily food intake of rats were observed. The orbital blood was taken to separate into the serum and 24 hours urine was collected. The serum indexes such as UA, BUN, Cr, ALT, AST, TC, TG, LDL-c were determined every 2 weeks, and XOD, ADA enzyme activity were determined at the 4th week. The urine indexes such as UA, Cr and Cua/Ccr were determined at the 4th week. After stopping modeling, the serum UA were determined two weeks and four weeks later respectively. At the 2nd week, the body weight and daily food intake of rats in the lipid emulsion group reduced significantly, and the level of serum UA, BUN, Cr, TC, LDL-c, ATL, AST raised significantly meanwhile TG reduced. At the 4th week, the serum UA in high purine diet group did not raise, and the serum XOD raised obviously while ADA did not; the serum UA in lipid emulsion group was higher significantly, and the serum XOD and ADA raised while Cua/Ccr reduced obviously. At the 6th weeks, the serum UA in both the high purine diet group and lipid emulsion group raised obviously. After stopping modeling, the serum UA in lipid emulsion group still maintained a high level at the 2nd week and back to the normal level at the 4th week. Compared with high purine diet, the hyperuricemia model induced by lipid emulsion forms earlierand more stable. It maybe has great value to study the pharmacodynamics of traditional Chinese medicine treatment to hyperuricemia disease. Its mechanism may be related to increasing XOD and ADA enzyme activity which can promote uric acid synthesis, meanwhile inhibiting of uric acid excretion.
Animals ; Diet ; adverse effects ; Disease Models, Animal ; Emulsions ; adverse effects ; metabolism ; Humans ; Hyperuricemia ; metabolism ; Lipid Metabolism ; Lipids ; chemistry ; Male ; Rats ; Rats, Sprague-Dawley

Abstract: Objective　To analyze the influencing factors of mother-to-child transmission of hepatitis B virus after combined immunological blockade, and to evaluate the effect of mother-to-child blockade, and to provide a basis for health policies and health interventions for preventing mother-to-child blockade of hepatitis B virus. Methods A total of 11 363 pairs of HBsAg positive pregnant women and their infants aged 7-12 months in Hainan Province from 2015 to 2020 were included in the study. The general situation, the situation of health care and delivery in this pregnancy and perinatal period, the detection of hepatitis B markers, the situation of antiviral therapy, the general situation of mother and infant during delivery and the implementation of blockade measures for mother-to-child transmission of hepatitis B were collected and analyzed. Results Among the 11 363 pairs of HBsAg positive pregnant women and their infants delivered in hospitals in Hainan province from 2015 to 2020, the positive rate of HBsAg in children at 7-12 months after birth was 1.47 %, and the difference in HBsAg positive rate of infants born in different years was not statistically significant (P>0.05). There were no significant differences in the positive rate of HBsAg among children born to pregnant women with different nationalities, educational levels, occupations, delivery modes, delivery places, obstetric operations and perineal laceration, abnormal perinatal period, children with different genders and premature delivery and perinatal (all P<0.05). There was significant difference in HBsAg positive rate among infants born to pregnant women of different ages, the positive rate of HBsAg of infants born to young pregnant women was higher than that of older pregnant women (P<0.05). The rate of antiviral therapy was low in HBeAg positive pregnant women, and the positive rate of HBsAg in their infants was 2.54%, which was higher than 0.83% in HBeAg negative pregnant women (P<0.05). Conclusions Combined immunological blockade with hepatitis B vaccine and hepatitis B immunoglobulin can effectively prevent the mother-to-child transmission of HBV. HBsAg-positive women can give birth at the right age, and HBeAg-positive pregnant women can be treated with antiviral therapy to block mother-to-child transmission, providing the important basis for the formulation of hepatitis B prevention and control strategies and measures.

The gene expressions of codeinone reductase (COR) and berberine bridge enzyme (BBE) in Papaver somniferum were blocked by RNA hairpin of RNA interference (RNAi). The complete sequences of COR and BBE genes were cloned by reverse transcription-polymerase chain reaction (RT-PCR), the results of homology comparison revealed that the cloned COR and BBE genes had high homology with the other gene family members reported in the GenBank. The target sequences of COR and BBE genes were screened in accordance with the design principle of RNAi, a 643 bp fusion gene was obtained by the method of overlapping PCR, then plant expression vector ihpRNA was constructed based on intermediate vector pHANNIBAL and plant expression vector pCEPSPS. With that 78 transgenic plants were obtained through Agrobacterium-mediated and 17 positive plants were screened by PCR, that could initially indicate that the target fragments of COR and BBE gene had been integrated into tobacco genome.
Artificial Gene Fusion ; Genetic Vectors ; NAD (+) and NADP (+) Dependent Alcohol Oxidoreductases ; genetics ; Oxidoreductases, N-Demethylating ; genetics ; Papaver ; enzymology ; genetics ; Plants, Genetically Modified ; enzymology ; genetics ; RNA Interference ; RNA, Small Interfering ; Tobacco ; genetics ; Transformation, Genetic

U251 cell is a sensitive cell line to serum, which stops at G0 phase of cell cycle in no-serum medium, and recovers growth when the serum is added into no-serum medium. The cell can express corresponding proteins in different phase of cell cycle. Therefore it is very signification for the study of cell cycle regulation mechanism that explores these proteins. In this paper, the mouse antibody phage display library was added into the bottle in which the serum starvation U251 cells had been cultured, and the special antibody phages were absorbed. Then the absorbed antibody phages were amplified by adding E. coli TG1 and helper phage M13K07. Amplified antibody phages were added into bottle in which the serum cultured cell after serum starvation (follow named as serum recovered cells) were incubated, so that the cell absorbed the no-special antibody phages for the serum starvation cell and the special antibody phages were in supernatant. The remaining no-special antibody phages in the supernatant were discarded by repeating above program 3-4 times. The pure special antibody phages were gotten, and amplified by adding the host cell E. coli TG1 and helper phage M13K07. Then the host bacterium infected special antibody phage was spread on the plate medium with ampicillin, and the monoclonal antibody phages were gotten. Using same as above program, the monoclonal antibody phages absorbed specially for serum recovered U251 cells were obtained when the serum recovered cells instead of serum starvation cells and serum starvation cells instead of serum recovered cells. In this study, ninety-six positive monoclonal antibody phages that absorbed specially the serum starvation cells and eighty-two positive monoclonal antibody phages that absorbed specially the serum recovered cells were obtained. By using cell immunochemistry assay, two special signification antibodies were obtained. one (No.11) was the strong response in serum starvation cells, the other (No.2) was the strong response in serum recovered cells. The antibody No.2 had the distinctive response to the serum recovered cells in different incubation time (15min, 30min, 1h, 2h, 4h, 8h, 12h and 48h) after serum starvation. The results showed that No.2 antibody would be useful to research the factors of cell cycle regulation and apply to tumor diagnosis.
Antibodies, Neoplasm ; genetics ; immunology ; isolation & purification ; Bacteriophages ; genetics ; Brain Neoplasms ; immunology ; pathology ; Cell Line, Tumor ; Escherichia coli ; genetics ; metabolism ; Glioma ; immunology ; pathology ; Humans ; Peptide Library

OBJECTIVETo investigate the relationship between the infection rate of Mycoplasma pneumoniae (MP) and age, sex and season.

METHODSPassive agglutination assay was used to detect Mycoplasma pneumoniae antibodies (MP-Ab) in the serum of patients with respiratory tract infection, and MP-Ab test results in 2010 were analyzed.

RESULTSThe positive rates of 5 year test results were 30.10%; among the results, the positive rates of male and female patients were respectively 30.74% and 36.12%, the difference was statistically significant (P < 0.05); And every age group were significantly different (P < 0.001), among each group, the positive rate of 3-14 years old patients was the highest; the season was no significant difference in incidence rates; the patients of positive titer > 1:640 accounted for 10.18% of the patients.

CONCLUSIONMP infection is increasing year by year, children aged 3 to 14 has become the high-risk groups. Women are more susceptible to MP than the men and the chances of infection are throughout the year, but the most of the patients have a good prognosis.

Adolescent ; Adult ; Aged ; Aged, 80 and over ; Antibodies, Bacterial ; blood ; immunology ; Child ; Child, Preschool ; Female ; Humans ; Infant ; Male ; Middle Aged ; Mycoplasma pneumoniae ; immunology ; isolation & purification ; Pneumonia, Mycoplasma ; immunology ; microbiology ; Respiratory Tract Infections ; blood ; immunology ; microbiology ; Young Adult

The expression vectors of the gene encoding ScFv-2F3 were transformed into E. coli BL21(DE3). Clones of higher expression were first selected, then were grown in the presence of IPTG at 37 degrees C to induce its expression. The culture conditions were carefully optimized. It was found that optimal conditions were as follows: the induction was started as OD590 reached to 1.0-1.8; the concentration of IPTG was 0.3-0.5 mmol/L and induction time is 7 h. The yield of ScFv-2F3 expressed in the selected clones is about 20% of the total proteins. The optimal culture conditions were successfully applied to fermenter of 50 L. The conditions of washing the inclusion bodies were also optimized. A two-step method was used to renature the inclusion body. The expression product of interest and its biological activities were characterized with Western blotting and ELISA. A novel selenium-containing single-chain abzyme with GPX activity was prepared.
Antibodies, Catalytic ; biosynthesis ; chemistry ; genetics ; isolation & purification ; Bioreactors ; microbiology ; Cloning, Molecular ; Escherichia coli ; Gene Expression ; Immunoglobulin Fragments ; biosynthesis ; chemistry ; genetics ; isolation & purification ; Inclusion Bodies ; metabolism ; Protein Folding ; Protein Renaturation ; Recombinant Proteins ; biosynthesis ; chemistry ; genetics ; isolation & purification ; Selenium ; metabolism