1.The Pulse Monitoring System Based on MCU and GSM
Yinghua CHEN ; Guofeng LI ; Hongpeng CHEN
Chinese Journal of Medical Physics 2010;27(2):1766-1768
Objective: This thesis describes a pulse monitoring system based on MCU and GSM. Methods: Monitoring system is a wireless remote monitoring devices which using the SMS in GSM mobile communications network. The signal of pulse is acquisited by Acquisition Circuit, after timing and counting by MCU, pulse rate above the standard is directly transmited to family cell or Dr Mobile by GSM. Results: If the patient arises suddenly heart disease, monitor can be promptly sent to the pulse rate above the standard for family cell or Dr Mobile so that patients receive timely aid. Monitor has advantages of a wide coverage, economic and convenience. Conclusions: The monitor will greatly reduce the burden on the patient's family and hospital, This pulse monitoring system can meet with demands of service in the family and villa nursing and hospital.
2.Relationship between plasma D-lactate levels and prognosis of neonatal necrotizing enterocolitis
Dongmei CHEN ; Guofeng LEI ; Weilin PENG
Chinese Journal of Perinatal Medicine 2011;14(10):583-586
Objective To investigate the relationship between plasma D-lactate levels and prognosis in newborns with neonatal necrotizing enterocolitis (NEC).Methods One hundred and four premature infants with NEC (stase Ⅱ and Ⅲ ) and another 104 premature infants without NEC admitted into Quanzhou Children's Hospital for other diseases from January 2007 to October 2010 were selected into this case control study.The gestational age,gender and birth weight of patients in the two groups were matched.NEC patients' bloods were collected within 24 hours after NEC was confirmed and blood samples of the control group were collected at the corresponding age.Enzymelinked immunosorbent assay was used to detect the plasma D-lactate level.Receiver operating characteristic curve was used to confirm the criteria of D-lactate positive,according to which,the NEC group was divided into high D-lactate group and normal D-lactate group,and the mortality and complication rate of the two groups were compared with x2 test.And NEC group was subdivided into death group and survive group according to the prognosis of the patients,and the difference of D-lactate level between the two groups were compared with t test.Results Among the NEC group,there were 63 cases (60.6%) of stage Ⅱ and 41 (39.4%) cases of stage Ⅲ ; 88 (84.6%) survived infants and 16 (15.4%) dead infants.D-lactate level was (35.4 ± 29.1) μg /ml in stage Ⅲ NEC group,(29.5±16.2) μg/ml in stage Ⅱ NEC group and (3.7±18.4) μg/ml in control group; there were statistical differences between each other(F=5.97,P<0.05).Receiver operating characteristic curve analysis showed that if 6 μg/ml was set as the borderline,there were 87 cases(83.7%,87/104) with high D-lactate patients in NEC group,whose neonatal critical illness scoring (NCIS) was 80.9±22.6,significantly lower than that of normal D-lactate patients ( 95.8 ± 20.5) (t =2.417,P< 0.05),and higher neonatal septicemia rate (48.3%,42/87) and mortality (27.6%,24/87) compared with those [(5.9%,1/17) and (5.9%,1/17)] of normal D-lactate patients(x2 =11.539 and 7.146,P<0.05,respectively).In NEC group,compared with the survived infants,the D-lactate level [(43.2±13.5) μg/ml vs (21.9 ± 22.9) μg/ml,t =4.572,P<0.05] and the rate of septicemia [68.8% (11/16) vs 38.6% (34/88),x2 =3.445,P<0.05] were higher in dead patients,and NCIS (82.4± 29.1 vs 90.6 ± 21.3,t =2.409,P<0.05) was lower.Conctusions The level of plasma D-lactate related to the prognosis of neonatal NEC and which might be a good indicator for its prognosis and severity.
3.EFFICACY OF TOPICAL APPLICATION OF EPHEDRINE AND FURACILIN NASAL DROPS COMBINED WITH TETRACAINE IN REDUCING COMPLICATIONS OF POSTOPERATIVE NASAL PACK REMOVAL
Zhenying WANG ; Bang CAI ; Guofeng CHEN
Modern Hospital 2015;(1):40-42
Objective To assess the efficacy of topical application of Ephedrine and furacilin nasal drops combined with tetracaine in reducing complications of pack removal after nasal surgery.Methods 81caseshaving un-dergone nasal septum surgery were randomly divided into the experimental group and control group: the former were treated with Ephedrine and furacilin nasal drops combined with tetracaine and the blank control group.The occur-rence of complications at removing nasal fillers after nasal surgery was assessed.Results The hemorrhage and pain in the experimental group were significantly less than those in the blank control group (p <0.05).Conclusion top-ical application of Ephedrine and furacilin nasal drops combined with tetracaineis an effective method for reducing the pains of pack removal after nasal surgery.
4.Matrine Compoand Injection Interrening the Liver Fibrosis Rat Induced by Tetrachloride.
Jinhua YU ; Chunhui SONG ; Guofeng CHEN
Journal of Medical Research 2006;0(03):-
Objective To examine the change of TGF-?1 in the bloods of rats which were induced by tetrachoride during the different times and to explain the mechanism of the change.MethodsThe experimental liver fibrosis induced by tetrachloride in rats was treated by matrine compound injection.Serum TGF-?1 and pathological changes in liver tissue were observed in control group,model group and therapy group during the time of the 4th,6th and 9th week.ResultsThere was an obvious change of TGF-?1 in the blood in different time and different groups.ConclusionMatrine compound injection has an antifibrogenetic action and TGF-?1 can reflect the change of liver fibrogenesis of different time as an index.
5.Clinical features of 50 patients with primary biliary cirrhosis
Bing LI ; Guofeng CHEN ; Huihuang HUANG
Medical Journal of Chinese People's Liberation Army 1983;0(05):-
Objective To study the clinical features of primary biliary cirrhosis (PBC) in order to improve the clinical diagnosis. Methods Clinical data of fifty patients with PBC were retrospectively studied. The clinical features, results of laboratory tests, pathological findings of all the fifty patients were analyzed. Results forty-four patients were female (88%), and the mean age was 44.94?12.33 years at the time when definite diagnosis was made. The most frequent symptoms complained were fatigue (34/50, 68%), anorexia (24/50, 48%) and pruritus (13/50, 26%).The major signs included jaundice (32/50, 64%), splenomegaly (24/50, 48%) and liver palms (14/50, 28%). Serum alkaline phosphatase (ALP) and r glutamyl transpeptidase (r-GT) levels were markedly elevated in most patients, and the levels of ALP and GGT declined during the advanced stage. The levels of ALT and AST were elevated slightly. The total level of serum bilirubin was elevated in thirty-two patients (64%). Positive anti-mitochondrial antibody (AMA)/AMA-M2 were found in forty-one patients (82.0%). Pathological examination was done in 32 patients, it was shown that 28 patients (87.5%) were in early stage and 4 patients (12.5%) in advanced stage. Conclusion PBC occurs mainly in middle- and old aged women. The main clinical manifestations are fatigue, anorexia and pruritus. The elevated level of ALP, r-GT and positive AMA/AMA-M2 may be crucial to diagnosis of PBC.
6.Studies on RNase H of hepatitis B virus DNA polymerase to up-regulate the expression of cellular apoptosis susceptibility gene
Dong JI ; Hong ZANG ; Guofeng CHEN
Medical Journal of Chinese People's Liberation Army 1982;0(01):-
Objective To study the activation effect of HBV RNase H protein on the transcription of cellular apoptosis susceptibility gene (CAS). Methods The promoter of DNA sequence of CAS gene was identified in GenBank by bioinformatics and amplified from HepG2 genome by PCR using sense (5′-GGTACCCGATTACATGTTGTACATGAAGG-3′) and antisence (5′-CTCGAGGCTGAGTTCCATTGCTATAG-3′) primers. As these primers contained Kpn I and Xho I recognition sites on their respective 5′-ends, the amplified DNA fragments were tested by sequencing and then subcloned into Kpn I/Xho I sites of pCAT3-Basic reporter vector by routine molecular biological methods. The reconstructed plasmid named pCAT3-CASp was identified by enzyme digestion of Kpn I/Xho I, in which the expression of chloramphenical acetyltransferase (CAT) was under the control of the promoter of CAS. The HepG2 cells were transfected by pCAT3-CASp, and then co-transfected by pCAT3-CASp and pcDNA3.1(-)-RH plasmids. At the same time, the empty pCAT3-basic and pCAT3-TXNRD1p were transfected (self-contructed by the authors) as controls. After 24h culturing, cells were collected and the expression of CAT activity was detected by ELISA according to the manufacturer′s protocol. Results The optical density of expression of CAT of pCAT3-CASp was 0.043 by ELISA, in contrast, the optical density of expression of pCAT3-Basic was 0.024. The expression of CAT in co-transfection of pCAT3-CASp and pcDNA3.1(-)-RH(0.065) was 1.5 times as higher as pCAT3-CASp plasmid (0.043), and 2.7 times as higher as pCAT3-Basic. Conclusions The CAS gene promoter identified in present study has transcription activity and HBV RNase H protein may activate the expression of CAS gene.
7.Role and significance of hydrogen peroxide-induced transforming growth factor beta1 expression in ligamentum flavum hypertrophy
Zhiqing WANG ; Xiongsheng CHEN ; Shengyuan ZHOU ; Guofeng XU
Chinese Journal of Tissue Engineering Research 2017;21(12):1867-1871
BACKGROUND:The pathogenesis of ligamentum flavum hypertrophy remains poorly understood, and the expression of transforming growth factor beta1 (TGF-β1) is increased notably. Reactive oxygen species (ROS) accumulation is associated with tissue degeneration, which may accelerate the progression of ligamentum flavum hypertrophy by upregulating TGF-β1 expression. OBJECTIVE:To clarify the effect and significance of ROS H2O2-mediated up-regulation of TGF-β1 and collagen type Ⅰ in the progress of ligamentum flavum hypertrophy. METHODS:Ligamentum flavum was removed from a case of acquired lumbar disc herniation with normal ligamentum flavum during lumbar posterior decompression surgery, and then separated and cultured in vitro to the 4-6 generations, followed by exposure to H2O2 at various concentrations (0, 50, 100, 150, 200μmol/L) for 72 hours. The mRNA and protein expression levels of TGF-β1 and collagen type Ⅰ were detected by real-time PCR and western blot assay, respectively. RESULTS AND CONCLUSION:Real-time quantitative PCR showed that the mRNA expression level of TGF-β1 was significantly increased in the 150 and 200μmol/L groups (P<0.05). The mRNA expression level of collagen type Ⅰ was significantly higher in the experimental groups than that in the control group, especially in the 200μmol/L group (P<0.05). Western blot assay revealed that the protein expression levels of TGF-β1 and collagen type Ⅰ were significantly increased in a dose-dependent manner (P<0.05). These findings indicate that H2O2 may accelerate the progression of ligamentum flavum hypertrophy by up-regulating the expression levels of TGF-β1 and collagen type Ⅰ.
8.Rosiglitazone pretreatment influences expression of PPARγ, Nrf2 and HO-1 in thrombin-activated microglia
Hang HANG ; Likun WANG ; Guofeng WU ; Xingyu CHEN
Chinese Journal of Pathophysiology 2016;32(4):671-679
AIM:To observe the effect of rosiglitazone (RGZ) pretreatment on the expression of peroxisome proliferator-activated receptor γ( PPARγ) , nuclear factor E2-related factor 2 ( Nrf2 ) and heme oxygenase-1 ( HO-1 ) in the microglia cells activated by thrombin.METHODS:Microglia cells were obtained from the brain tissues of the newborn rats and were primarily cultured in vitro.After cultured for 14 d, the microglia cells were used in the experiment.The iso-lated microglia cells were randomly divided into normal control group, thrombin stimulation group ( TH group) , rosiglita-zone intervention group ( RGZ +TH group ) and retinoic acid intervention group ( RA +TH group ) .The expression of PPARγ, Nrf2 and HO-1 was observed by immunocytochemistry, real-time PCR and Western blot.RESULTS:The number of positive staining cells of PPARγ, Nrf2 and HO-1 in TH group, RGZ+TH group and RA+TH group were increased re-markably as compared with control group.The significant increases in PPARγ, Nrf2 and HO-1 were observed in RGZ+TH group compared with other groups.The mRNA expression of PPARγ, Nrf2 and HO-1 in RGZ+TH group was increased significantly as compared with TH group, control group or RA+TH group (P<0.01), Besides, the mRNA expression of Nrf2 and HO-1 in RA+TH group was decreased as compared with TH group or RGZ+TH group (P<0.01).The protein levels of PPARγ, Nrf2 and HO-1 in RGZ+TH group were significantly increased as compared with TH group, control group or RA+TH group (P<0.01).The protein expression of Nrf2 and HO-1 in RA+TH group was decreased as com-pared with TH group or RGZ+TH group (P<0.01).CONCLUSION:Rosiglitazone pretreatment might increase the ex-pression of PPARγ, Nrf2 and HO-1 in the microglia cells activated by thrombin.By inhibiting the expression of Nrf2 after RA pretreatment, the expression of the downstream gene HO-1 is also influenced.The anti-oxidative stress effects of rosigli-tazone might be achieved partly by modulating Nrf2 to control the downstream gene HO-1.
9.Hydrogen-rich saline ameliorates the expressions of cytokines in a rat model of inflammatory pain through activating heme oxygenase-1
Guofeng ZHANG ; Hongguang CHEN ; Yonghao YU ; Guolin WANG ; Keliang XIE
Journal of Chinese Physician 2016;18(4):487-491
Objective To investigate whether hydrogen-rich saline could ameliorate the expressions of cytokines in a rat model of inflammatory pain through activating heme oxygenase-1 (HO-1).Methods Eighty male Sprague-Dawley (SD) rats,weighing 180 ~ 220 g,were randomly divided into five groups (n =16 in each group):Control group (Con),inflammation pain group (CFA),inflammation pain + hydrogen-rich saline group (CFA + H2),inflammation pain + HO-1 inhibitor Znpp-Ⅸ group (CFA + Znpp-Ⅸ),and inflammation pain + hydrogen-rich saline + HO-1inhibitor Znpp-Ⅸ group (CFA + H2 + Znpp-Ⅸ).The mechanical withdrawal threshold (MWT) and thermal withdrawal latency (TWL) were tested on days 1 (T1),2 (T2),3 (T3),5 (T4),7 (T5),and 14 (T6) after inflammation pain.The expressions of spinal HO-1 mRNA and protein were measured with real-time quantitative polymerase chain reaction (RT-PCR) and Western blot,and spinal inflammatory cytokines were measured with enzyme-linked immunosorbent assay (ELISA) on day 7 after inflammatory pain.Results Compared to Con group,MWT and TWL were significantly reduced;the spinal HO-1 mRNA level,protein expression and activity were increased;and the levels of tumor necrosis factor-α (TNF-α),interleukin (IL)-1β,IL-6 and IL-10 in spinal tissues were also increased in CFA group (P < 0.05).Compared to CFA group,MWT and TWL were significantly increased;the spinal HO-1 mRNA level,protein expression and activity were further increased;and the levels of TNF-α,IL-1β and IL-6 were decreased,while IL-10 was further increased in CFA + H2group (P < 0.05).Compared to CFA + H2 group,MWT and TWL were decreased;the spinal HO-1 mR-NA level,protein expression and activity were decreased;and the levels of TNF-α,IL-1β and IL-6 in spinal tissue were significantly increased,while IL-10 was decreased in CFA + H2 + Znpp-Ⅸ group (P <0.05).Conclusions Hydrogen-rich saline can ameliorate the mechanical and thermal allodynia in a rat model of inflammatory pain,and reduce the release of inflammatory cytokines via activating HO-1.
10.Distribution and drug resistance of bacterial pathogens isolated from peritonsillar abscess during ;2010-2014 in Wenzhou
Guangzao XIANG ; Weijun CHEN ; Guofeng XIONG ; Shile XU ; Hanshuang ZHANG
Chinese Journal of Clinical Infectious Diseases 2015;(4):311-316
Objective To investigate the distribution and drug resistance of bacterial pathogens isolated from peritonsillar abscess .Methods Data on bacterial pathogens isolated from peritonsillar abscess in Wenzhou Central Hospital from January 2010 to December 2014 were retrospectively analyzed .Strains were identified with Vitek 32 identification system and the drug susceptibility test was performed with K-B method.Chi-square test for linear trend was performed to reveal the changes of distribution and drug resistance of the strains .Results A total of 2 864 bacterial strains were isolated in five years , in which 1 786 strains were Gram-negative bacilli (62.4%), and 1 078 (37.6%) strains were Gram-positive cocci. The positive rate of Gram-negative bacilli was on the rise during year 2010-2014 (χ2 =84.74, P<0.01), and the top three Gram-negative bacilli were Pseudomonas aeruginosa, Acinetobacter baumannii and Haemophilus influenzae, which accounted for 72.5%(1 295/1 786) of the total Gram-negative strains, and the positive rates of first two bacilli were on the rise (χ2 =83.75 and 24.74, P<0.01).Gram-positive cocci were mainly Staphylococcus aureus and Hemolytic streptococcus, which accounted for 83.2% ( 897/1 078) of the total Gram-positive strains.Resistance rates of Pseudomonas aeruginosa to ceftazidime, cefoperazone, piperacillin/tazobactam were on the rise (χ2 =16.17, 13.48 and 11.44, P<0.05), while resistance rates to gentamicin and amikacin were on the decline (χ2 =16.54 and 16.63, P <0.05). Resistance rates of Acinetobacter baumannii to ceftazidime, cefoperazone/sulbactam and piperacillin/tazobactam were on the rise (χ2 =12.52, 10.85 and 14.14, P<0.05).Resistance rates of Haemophilus influenzae to ampicillin were on the rise (χ2 =10.21, P<0.05), and the positive rate of β-lactamase producing strains was also on the rise (χ2 =10.38, P<0.05).Resistance rates of Staphylococcus aureus to cefazolin and methicillin were on the rise (χ2 =15.44 and 12.53, P<0.05), but no vancomycin resistant strain was found .Hemolytic streptococcus were sensitive to all commonly used antibiotics .Conclusions Peritonsillar abscess in Wenzhou Central Hospital is mainly induced by Gram-negative bacilli infection . Pseudomonas aeruginosa, Acinetobacter baumannii and Staphylococcus aureus are the top three bacterial pathogens , and are highly resistant to most antibiotics .