1.Capillary electrophoresis analysis on the brucine ingredient in the biospecimens from the poisoning victim
Yanxu LU ; Shuanglong SUN ; Yichun LI
Chinese Journal of Forensic Medicine 1988;0(04):-
To assay the quantity of the brucine ingredient in gastric content and hepatic tissues from the patient died of Semen Strychni hainanensi accumulative posioning.With standard brucine and the crude powder of the Semen Strychni hainanensi as control,the brucine ingredients in the above tissues were quantitatively scanned by the capillary elecrophoretic apparatus within the wave length ranging 190~600nm.The contents of the brucine ingredients in the gastric,hepatic tissues and the crude powder of the Semen Strychni sainanensi were 5 83mg/100ml,4 92mg/100g,and 3 07%(w/w)respectively.The high level of the brucine ingredients in the gastric content and the hepatic tissue is the cause of death.
2.Effect of Anti-virus Capsule on Quality of Life of Patients with Recurrent Genital Herpes
Yichun ZHENG ; Guowei XUAN ; Hongyi LI
Journal of Guangzhou University of Traditional Chinese Medicine 2004;0(06):-
【Objective】To investigate the effect of Anti-virus Capsule(AVC) on quality of life(QOL) of patients with recurrent genital herpes(RGH).【Methods】The universal QOL measurement scale of WHOQOL-BREF was used to evaluate the QOL status of 40 RGH patients before and after treatment.The recurrence rate and skin lesion healing time were also observed before and after treatment.【Results】After treatment,QOL was much improved,mean recurrence rate was decreased and skin lesion healing time was shortened,the difference being significant(P
3.Dietary Exposure Assessment of Dioxin in Australia and Research Prospect in China
Tianjin CHEN ; Yun LI ; Yichun HU
Journal of Environment and Health 2007;0(12):-
As a first-grade carcinogen,the dioxin had caused huge food safety and political crisis as well as economic losses, and posed unacceptable health risk to consumers in some European countries.The international community has commonly shown great concerns for the issue.Three specific researches on the dietary exposure risk of Australian consumers posed by dioxin have been undertaken in Australia since 2001.Reliable results of the research have been obtained.This paper outlined origin, development and the status of the Australian dioxin dietary exposure assessment.Prospecting for developing the dioxin dietary exposure assessment in China has been put forward based on the discussion of the Australian experience.
4.Research advances on the ratio ofmonocyte to HDL in the diagnosis and prognosis of coronary heart disease
Chaofa HUANG ; Yichun WEI ; Juxiang LI
Basic & Clinical Medicine 2017;37(4):557-560
Atherosclerosis is the main cause of coronary heart disease, Now it is thought that atherosclerosis is a chronic inflammatory disease.The ratio of Monocytes to high-density lipoprotein (MHR) is a new inflammatory marker of coronary atherosclerosis, which is measured simply and cheaply.MHR is associated with short-term and long-term incidence of cardiovascular events and morbidity of Coronary heart disease, which can be used as predictor of coronary heart disease prognosis.
5.Establishment of the DOCA-Salt hypertensive rat model
Shunna GE ; Wenwen LI ; Yichun ZHU
Chinese Pharmacological Bulletin 1986;0(06):-
Aim To establish a reliable and practical rat model with hypertension induced by DOCA-Salt.Methods One week after nephrectomy,the rats were subcutaneously injected with DOCA (30 mg?kg-1) once a week and fed with a chaw with 10 g?L-1NaCl plus 2 g?L-1 KCl in drinking water for 4 weeks. Blood pressure was measured and,urine was collected for measurement of volume(UV),UNaV,UClV,UKV,UCaV and pH values,once a week. SGPT,CREA,SUGA,TRIG,CHOL,INS,ALD,ADH were measured in circulating blood samples. Kidney morphological changes and Na+,K+-ATPase activity of the renal tubular epithelial cells were also examined. Results Blood pressure,UV,UNaV and UClV were increased and histopathological changes of the kidney such as glomerulus sclerosis and tubular pachynsis were observed in the DOCA-Salt rats. Whereas UKV,UCaV,urine pH values,SGPT,CREA,SUGA,TRIG,CHOL,INS,ALD and ADH were not changed. In contrast,Na+,K+-ATPase activity of the renal tubular epithelial cells was decreased. Conclusion DOCA-Salt is a reliable hypertensive model with sodium retention.
6.Content Analysis of 5 Kinds of Heavy Metal in Yougui Pills
Cunjin LI ; Ting XIE ; Yunfeng ZHOU ; Jiehua DENG ; Zhe WU ; Zhaoguang HUANG
China Pharmacy 2021;32(19):2377-2382
OBJECTIVE:To investigate the contents of 5 kinds of heavy metal as copper (Cu),arsenic(As),cadmium (Cd),mercury(Hg)and lead (Pb)in Yougui pills ,and to evaluate its safety risk. METHODS :Using yttrium (89Y),indium (115In)and bismuth (209bi)as internal standard ,the contents of each element were determined by ICP-MS. ICP-MS condition included that atomization gas flow rate was 0.95 L/min,auxiliary gas flow rate was 1.2 L/min,plasma gas (argon)flow rate was 18 L/min,pump speed was 30 r/min. RF power of inductively coupled plasma was 1 200 W,the voltage in simulation stage was 1 750 V,the voltage in pulse stage was 1 300 V,the voltage of deflection device was -12 V,and the detector was in analog and pulse dual-mode. The determination methods of various elements were investigated ,and 45 batches of marketed Yougui pills were determined. Hazard index (HI)was used to analyze the non-carcinogenic risk of each element and calculate the maximum residual limit(MRL)of each element. RESULTS :The linear range of Cu ,As,Cd,Hg and Pb ranged from 10-200,1-50,0.4-30,0.2-6 and 2-100 μg/L(all r>0.999 0),respectively. The limits of quantitation were 0.67,0.23,0.20,0.07,0.27 μg/L. The limits of detection were 0.20,0.07,0.06,0.02,0.08 μg/L. RSDs of precision,stability and reproducibility tests were all lower than 3.5% (n=6 or n=5). Average recoveries were 92.96%-100.89%(RSD=2.23%-3.62%,n=3). Average contents of Cu ,As,Cd,Hg and Pb in 45 batches of Yougui pills were 2.72,0.28,0.07,0.05,0.62 mg/kg,and superimposed HI of each element was less than 1. The contents of 5 kinds of heavy metals in Yougui pills were lower than the proposed MRL (MRL of Cu ,As,Cd,Hg and Pb were 20,2,1,0.2,5 mg/kg or 111.11,4.44,2.22,1.48,8.89 mg/kg respectively ). CONCLUSIONS :Established method can be used for the determination of content of 5 kinds of heavy metal in Yougui pills ;the heavy metal pollution rate of marketed Yougui pills is low and the safety risk is small.
7. Regulation Mechanisms of Sirt7 in Pathophysiological Activities
Yang-Yang LU ; Yan LI ; Cheng LUO
Chinese Journal of Biochemistry and Molecular Biology 2022;38(5):570-576
Silent mating type information regulator 2-related enzymes or sirtuin family proteins are nicotinamide adenine dinucleotide (NAD
8.Inhibitory effect of agonist of I K1 channel on arrhythmia induced by isoproterenol in rats
Chaohong LI ; Yichun CHEN ; Xuwen ZHAI ; Qilong FENG
Chinese Pharmacological Bulletin 2015;(8):1081-1084,1085
Aim To investigate the inhibitory effects of zacopride(Zac) on arrhythmia induced by isoproterenol ( ISO) and the underlying mechanisms in rats. Meth-ods ①ECGs were recorded in anesthetized rats in vi-vo to observe the effects of zacopride on arrhythmia in-duced by ISO. ② Intracellular microelectrode tech-nique was used to investigate the effects of zacopride on resting membrane potential, delayed afterdepolariza-tions ( DADs) and triggered activity ( TA) induced by ISO combined with 3. 6 mmol·L-1 CaCl2 in right ven-tricular papillary muscle of rats. Results ① In ISO group rats, ventricular premature beats ( VPB ) oc-curred frequently with ST-segment depression. Com-pared with ISO group, the incidence of VPB in ISO+Zac group decreased from 100% to 50% ( n=6 , P<0. 05 ) and the total number of VPB recorded in 1 hour significantly reduced from 1 574 ± 521 to 33 ± 40 ( n=6,P<0. 05). ② Zacopride at 1 μmol·L-1 could hy-perpolarize the resting membrane potential of right ven-tricular papillary muscle in normal rat from ( -74. 42 ± 1. 95 ) mV to ( -78. 50 ± 2. 07 ) mV ( n =6 , P <0. 05). ③ Zacopride at 1 μmol·L-1 significantly de-pressed the DADs and TA induced by ISO combined with 3. 6 mmol·L-1 CaCl2 in right ventricular papilla-ry muscle. The incidence of DADs decreased from 93. 75% in rats in ISO group to 25% in ISO +Zac group ( n =16 , P <0. 05 ) , and this antiarrhythmic effect could be reversed by 1 μmol·L-1 BaCl2 . Conclusions Zacopride, a selective IK1 channel ago-nist , can significantly inhibit cardiac arrthymia induced by ISO in rats, the mechanism of which is mainly at-tributed to zacopride-induced hyperpolarization of the resting membrane potential and subsequent suppression of DADs and TA via enhancing IK1 . These results pro-vide further evidence that to enhance IK1 moderately may be a feasible pathway for antiarrthymic therapy.
9.Cardiac arrhythmia suppression by I K1 channel agonist in isoproterenol-induced myocardial hypertrophic rats and investigation on its mechanism
Yichun CHEN ; Chaohong LI ; Mingzhu YANG ; Xiaolu WANG ; Qilong FENG
Chinese Pharmacological Bulletin 2016;32(8):1127-1132,1133
Aim To investigate the effect of zacopride ( Zac) on cardiac arrhythmia in isoproterenol ( ISO)-in-duced myocardial hypertrophic rats and the underlying electrophysiological mechanisms .Methods ① Fifty-one rats were randomly divided into control group ( n=17 ) , ISO group ( n=17 ) and ISO +Zac group ( n =17 ) .Rat model with cardiac arrhythmia and hypertro-phy was established by intraperitoneal ISO ( 5 mg?kg -1 ) injection.②ECGs were recorded to observe the effects of Zac on arrhythmia in model rats .③ Whole-cell patch clamp was applied to record inwardly rectifi-er potassium current(IK1), resting membrane potential ( RMP ) and amplicated delayed afterdepolarizations (DADs).Results ① Echocardiographic examination showed that , left ventricular end-diastolic dimension (LVEDD) and left ventricular end-systolic dimension (LVESD) significantly decreased in rats in ISO group compared with control group , whereas left ventricular posterior wall end-diastolic thickness ( LVPWd) and in-terventricular septum end-diastolic thickness ( IVSd ) increased ( P<0.05 ) , suggesting rat model of isoprot-erenol-induced myocardial hypertrophy was successfully established .② ECGs showed that 88.89% of rats in ISO group had ventricular premature beats ( VPBs ) , which significantly decreased to 11.11% after the ap-plication of Zac ( P <0.05 ) .③ Values of RMP de-creased from ( -71.05 ±1.27 ) mV in control group to (-69.38 ±1.21 ) mV in ISO group ( P<0.05 ) . After Zac administration , RMP significantly increased to ( -73.86 ±1.33 ) mV compared with control and ISO group(P<0.05).④DADs and TA incidence sig-nificantly decreased from 88.24% in ISO group to 11.76%in ISO+Zac group ( P<0.05 ) .⑤ Compared with control group , IK1 density was markedly reduced in ISO group, whereas Zac could effectively rescue IK1 suppression to normal level .Conclusions Zac, as a selective IK1 channel agonist , can significantly inhibit cardiac arrhythmia in isoproterenol-induced myocardial hypertrophic rats , which is mainly attributed to in-creased RMP by enhancing IK1 and subsequent suppres-sion of DADs.
10.Observation and nursing of airways in mechanically ventilated patients with ASOPP-induced respiratory failure
Cuiling LU ; Sheng TANG ; Jingtao LIU ; Yichun GONG ; Mei LI
Modern Clinical Nursing 2015;14(9):20-23
Objective To summarize the measures for nursing mechanical ventilated patients who suffered from respiratory failure caused by acute severe organophosphorus pesticide poisoning (ASOPP). Method Retrospectively, the nursing clinical data of 18 mechanically ventilated patients who suffered from ASOPP-induced respiratory failure in ICU from January 2013 to December 2014 were analyzed for summarizing the nursing measures concerning preventive extubation, airway humidification and sputum sucking, prevention of ventilator-associated pneumonia and final extubation. Result Sixteen ASOPP patients successfully recovered after hospital discharge and another two died from multiple organ function failure because of excessive pesticides. Conclusions Effective observation and nursing care of airways based on their characteristics in ASOPP patients including prevention of unexpected shedding , appropriate humidity of airways and prevention of infection of ventilator-associated pneumonia(VAP). All of these measures can reduce complications and contribute to the early recovery of patients.