1.Progress in researches on L-asparaginase targeted to childhood leukemia.
Yan-qin CUI ; Fu-xiong CHEN ; Zi-liang WU
Chinese Journal of Pediatrics 2004;42(3):227-230
Antineoplastic Agents
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administration & dosage
;
adverse effects
;
therapeutic use
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Asparaginase
;
administration & dosage
;
adverse effects
;
therapeutic use
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Child
;
Drug Administration Routes
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Drug Administration Schedule
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Forecasting
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Humans
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Leukemia
;
drug therapy
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Precursor Cell Lymphoblastic Leukemia-Lymphoma
;
drug therapy
2.Verification of a method with low usage amount of arsenic trioxide for determining urinary iodine by As (Ⅲ)-Ce4+ catalytic spectrophotometry using ammonium persulfate digestion
Hui-qin, CHEN ; Jian-an, CHEN ; Mei-zhu, CHEN ; Zi-xian, DU
Chinese Journal of Endemiology 2013;32(4):442-445
Objective To verify a new revised method with low usage amount of arsenic trioxide for determining urinary iodine by As(Ⅲ)-Ce4+ catalytic spectrophotometry using ammonium persulfate digestion.Methods The standard curve linearity,sample detection limit,precision and accuracy of determining urinary iodine of this modified method were verified according to Determination Methods of Chemicals in Biological Materials.Results The linear correlative coefficients of the 0-300 μg/L range and 300-1200 μg/L range calibration curve were-0.9998--1.0000(n =6) and-0.9998--1.0000,respectively.The detection limit for iodine was 1.3 μg/L.The relative standard deviations were 1.5% (1.1/71.3)-2.5% (6.2/244.9) when measuring 3 urine samples with iodine concentration of 71.3-244.9 μg/L,and 0.6%(2.4/388.5)-1.7%(17.3/1018.0) when measuring 3 urine samples with iodine concentration of 388.5-1018.0 μg/L,respectively(n =6).The test results of the four urinary iodine national standard materials with iodine concentration of 73.0,206.0,556.0 and 883.0 μg,/L were all within the given value range and the average value relative deviation was 1.8% (1.3/73.0),0.4% (0.8/206.0),0.2% (1.0/556.0) and-1.6%(-13.7/883.0),respectively (n =6).The average recovery was 98.8% with a range of 93.2% (186.3/200.0)-103.4%(51.7/50.0) when measuring 3 urine samples with iodine concentration of 64.6-144.9 μg/L and 3 urine samples with iodine concentration of 346.8-574.4 μg/L,respectively.Conclusions This new modified method greatly reduces the amount of waste containing arsenic,and can directly take urine samples with high iodine concentration to digest and determine without dilution.It is performed with good standard linear curve,better precision and high accuracy,and in line with the analysis of biological samples requirements.
3.Analysis of 59 Anaphylactic Death Cases.
Zheng-dong LI ; Wing-guo LIU ; Zi-qin ZHAO ; Yi-wen SHEN ; Yi-jiu CHEN
Journal of Forensic Medicine 2015;31(3):206-210
OBJECTIVE:
To analyze the cases of anaphylactic death cases and explore the standards of judicial expertise of anaphylactic death for providing evidence for judicial expertise.
METHODS:
Fifty-nine cases death due to allergic reaction in Shanghai were collected. And details of medical history, clinical manifestation of anaphylactic reaction and postmortem examination findings were reviewed for all cases.
RESULTS:
In the 59 cases, there were 58 cases died from drug allergy, including 77.6% of them were antibiotics. The rates of treating in standard hospital and illegal clinic were 37.3% and 61.0%, respectively. The allergic symptoms were dyspnea and facial cyanosis. The time from contacting allergens to death ranged from 1 min to 3 d. The concentration of total serum IgE ranged from 50 to 576.92 IU/mL. The results of clinical manifestation and pathological anatomy had obviously changes.
CONCLUSION
Based on the exclusion of all other cause of death and synthetically analysis of details of cases, medical history, clinical manifestation and anatomy, the conclusion of anaphylactic death can reached. The details of cases including clinical history, exposure to allergens, and clinical manifestation play an important role in diagnosis of anaphylactic death.
Anaphylaxis/mortality*
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Anti-Bacterial Agents/adverse effects*
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Autopsy
;
China
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Drug Hypersensitivity/mortality*
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Forensic Sciences
;
Humans
4.Research Progress of circRNA and Its Significance in Forensic Science.
Ya-qi ZHANG ; Cheng-chen SHAO ; Cheng-tao LI ; Zi-qin ZHAO ; Jian-hui XIE
Journal of Forensic Medicine 2016;32(2):131-133
RNA has received more attention in the field of forensic medicine and the development of the new biological markers based on RNA shows great significance in the analysis of complex cases. circular RNA (circRNA) is a kind of non-coding RNA which is widely reported recently. Although the regulatory mechanisms of generation and expression are not fully clear, the existing research indicates that circRNA has important biological functions. CircRNA has a cell-type-specific expression with great stability and a high expression level, which makes it meaningful in forensic applications potentially. In this paper, the research progress, the generation and regulation of circRNA as well as its biological characteristics and functions are summarized, which will provide references for related studies and forensic applications.
Forensic Sciences
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Humans
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RNA
;
RNA, Circular
5.Expression of EIIIA+ fibronectin in incised wound of rat's skin.
Meng HE ; Hai ZHAO ; Yi-wen SHEN ; Ai-min XUE ; Long CHEN ; Yun-ju GU ; Zi-qin ZHAO
Journal of Forensic Medicine 2014;30(6):409-412
OBJECTIVE:
To explore the relationship between the expression of EIIIA+ fibronectin in incised wound of rat's skin and injury time.
METHODS:
The wounding model was established by cutting the dorsal skin of 48 adult SD rats. The rats were sacrificed at the pre-set injury time as immediately, 0.5 h, 1 h, 2 h, 3 h, 4 h, 6 h, and 8 h. The skin samples were taken at the margin of wound. The expression of the EIIIA? fibronectin was detected by immunohistochemistry and Western blotting and the relationship be- tween its expression and injury time was observed. Results The expression of EIIIA+ fibronectin was not observed immediately. The basal cell of skin began to show positive expression 0.5 h after injury. With the extension of injury time, positive staining became stronger. The value of relative optical density was gradually increased with prolonged injury time by the Western blotting analysis.
CONCLUSION
The expression of EIIIA+ fibronectin could be used for estimation of injury time in the early stage of skin injury.
Animals
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Fibronectins/metabolism*
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Immunohistochemistry
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Proteins/metabolism*
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Rats
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Rats, Sprague-Dawley
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Skin/metabolism*
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Staining and Labeling
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Time Factors
6.Bedside treatment of retinopathy of prematurity by laser photocoagulation.
Qiu-Ping LI ; Zong-Hua WANG ; Yao-Qin CHEN ; Jia CHEN ; Jie-Ting HUANG ; Zi-Zhen WANG ; Zhi-Chun FENG
Chinese Journal of Contemporary Pediatrics 2010;12(9):696-699
OBJECTIVETo study the efficacy of bedside treatment by laser photocoagulation for retinopathy of prematurity (ROP) in preterm infants hospitalized in the Neonatal Intensive Care Unit (NICU).
METHODSThe clinical data of 30 cases of ROP who underwent peripheral laser ablation on bedside in the NICU from March to August 2009 were studied retrospectively.
RESULTSA total of 59 eyes from 30 patients received the laser therapy, with a total cure rate of 95%. According to the International Classification of ROP, 26 eyes of 13 infants had zone 1 disease, and 33 eyes of 17 infants had zone 2 disease. The birth gestational age and birth weight as well as corrected gestational age and corrected weight at operation in the zone 1 disease group were significantly lower than those in the zone 2 disease group. The number of laser spots in the zone 1 disease group was significantly higher than that in the zone 2 disease group. The cure rate in the zone 2 disease group (100%) was significantly higher than that in the zone 1 disease group (88%).
CONCLUSIONSLaser retinal photocoagulation on bedside in the NICU is effective for both zone 1 and zone 2 ROP. As compared with the infants with zone 2 disease, the infants with zone 1 disease may have a poor outcome.
Birth Weight ; Female ; Gestational Age ; Humans ; Infant, Newborn ; Laser Coagulation ; Male ; Retinopathy of Prematurity ; surgery
7.Study on the expression of fibronectin after cerebral contusion in rats for timing of injuries.
Long CHEN ; Yi Jiu CHEN ; Ning Guo LIU ; Zhong LI ; Zi Qin ZHAO ; Yun Ju GU
Journal of Forensic Medicine 2001;17(1):1-61
An experimental model of reproducible focal cerebral contusions in rats was made by a free-drop impacting right hemisphere. The expression of fibronectin and its mRNA after cerebral contusion were detected respectively by immunohistochemical staining and in situ hybridization. Results indicated that the expression of fibronectin and its mRNA increased after injury, and there existed a relationship between increased fibronectin and its mRNA and different intervals after brain injury. It is inferred that the expression of fibronectin and its mRNA can be used for timing of brain injuries and distinguishing antemortem and postmortem brain contusions.
Animals
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Brain Injuries/metabolism*
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Fibronectins/biosynthesis*
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Immunohistochemistry
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In Situ Hybridization
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Male
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Postmortem Changes
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RNA, Messenger/biosynthesis*
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Rats
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Rats, Sprague-Dawley
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Time Factors
8.Molluscicidal activity of methanol extracts of Jatropha curcas leaves against Ampullaria gigas.
Zhao-Yu WANG ; Yan-Qi DU ; Yue-Zhu QIN ; Ji-Feng CHEN ; Zi-Min QUAN
Journal of Southern Medical University 2009;29(6):1235-1237
OBJECTIVETo evaluate the molluscicidal activities of methanol extract of Jatropha curcas leaves against Ampullaria gigas.
METHODSYoung snails, adult snails and eggs of Ampullaria gigas were treated with the methanol extract of J. curcas leaves at different doses for different time lengths and the molluscicidal effects of the extract were evaluated.
RESULTSThe methanol extract showed a significant molluscicidal effect on the young snails at a low concentration, and treatment with 75 mg/L extract for more than 3 days resulted in a 100% mortality rate of the young snails. The Jatropha leaf methanol extract also showed toxicity to adult snails and eggs.
CONCLUSIONJatropha leaves have a great potential for developing green pesticides to control Ampullaria gigas, but its biochemical mechanism needs further research.
Animals ; Jatropha ; chemistry ; Methanol ; chemistry ; Molluscacides ; pharmacology ; Plant Extracts ; pharmacology ; Plant Leaves ; chemistry ; Snails ; classification ; drug effects
9.Effect of diallyl disulfide on expression and secretion of VEGF in HL-60 leukemic cells.
Yi XIE ; Zi-Li FAN ; Chen-Jiao YAO ; San-Qin TAN ; Ya-Li ZHAO
Journal of Experimental Hematology 2006;14(2):212-216
The study was aimed to investigate the expression of VEGF mRNA and VEGF protein in HL-60 cells treated with diallyl disulfide (DADS), and to explore the antileukemic mechanism of DADS in respect of VEGF production. Semi-quantitative RT-PCR and ELISA were used to detect the expression of VEGF mRNA and secretion of VEGF protein in HL-60 cell lines treated by DADS respectively. The results showed that the expression of VEGF mRNA and secretion of VEGF protein were found in HL-60 cells. The expression of VEGF mRNA and secretion of VEGF protein in HL-60 cells could be down regulated by treatment with 0.625, 1.25, and 2.5 microg/mL DADS for 48 and 72 hours and the effects had a dose dependent relationship (r > 0.9, P < 0.01). The differences between DADS treated HL-60 cell groups and the control group were statistically significant (P < 0.01), there were also statistically significant differences among three DADS-treated HL-60 cell groups (P < 0.05). It is concluded that DADS effectively inhibits the proliferation of human leukemia cell line HL-60 cells; DADS exerts its antileukemic effects by reduction of the expression of VEGF mRNA and VEGF protein secretion.
Allyl Compounds
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pharmacology
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Antineoplastic Agents
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pharmacology
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Cell Proliferation
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drug effects
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Disulfides
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pharmacology
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HL-60 Cells
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Humans
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RNA, Messenger
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biosynthesis
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genetics
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Vascular Endothelial Growth Factor A
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biosynthesis
;
genetics
10.Clinicopathologic analysis of shock liver.
Chang Qing XU ; Zi Ping CHEN ; Zhen Fang LI ; Lei LI ; Jian Na ZHANG ; Qin ZHANG
Chinese Journal of Hepatology 2003;11(2):80-80
Adult
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Female
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Hepatitis
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pathology
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Humans
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Liver
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pathology
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physiopathology
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Male
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Shock
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mortality
;
pathology
;
physiopathology
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Survival Rate