1.The inhibitory effect of capsaicin on streptozocin-induced apoptosis of rat retinal cells
Ting, ZHANG ; Ji-hong, YANG ; Zheng, GUO
Chinese Journal of Experimental Ophthalmology 2013;(1):34-38
Background Diabetes mellitus (DM) can provoke the apoptosis of retinal cells and downregulate the expression of calcitonin gene related peptide (CGRP) in the retina.Capsaicin promotes the release of CGRP and elicits protective effects on human organs.However,whether CGRP protects retinal cells in diabetic retinopathy (DR) is still unclear.Objective The study was designed to examine the effect of capsaicin on the apoptosis of retinal cells in diabetic rats and its relationship with CGRP.Methods Forty clean healthy adult male Sprague-Dawey rats were randomly divided into the diabetes group,capsaicin pretreated group,streptozocin (STZ)control group,capsaicin control group and plain control group,with 8 rats per group.The diabetic model was established by the intraperitoneal injection of 60 mg/kg in all rats except those of the plain control group.0.4 mL of a 1% capsaicin injected at 20 mg/kg was subcutaneously injected for 3 consecutive days prior to model establishment in the capsaicin pretreated group,after which 1.2 mL of STZ was intraperitoneally injected on the fourth day.Rats from the STZ control group were administered intraperitoneally 1.2 mL of 0.1 mol/L,pH 4.5,citrate buffer.The capsaicin control group received subcutaneous injections of 0.4 mL of 1% capsaicin at 20 mg/kg for 3 consecutive days,after which 1.2 mL of 0.1 mol/L,pH 4.5,citrate buffer was administered intraperitoneally.The rats were sacrificed at the tenth week after model establishment and retinal specimens were prepared for the apoptosis assay by TUNEL staining and the quantitative analysis of caspase-3 activity.Expression of CGRP in the retina and serum was detected using ELISA.The use of experimental animals followed the Regulations for the Administration of Affairs Concerning Experimental Animals by State Science and Technology Commission.Results Retinal cell apoptosis was mainly localized to the retinal ganglion cell (RGC) layer.The apoptosis rate of RGCs was (43.4±5.0)% in the DR model group and (30.0±5.1)% in the capsaicin pretreated group,showing a significant difference (t =5.930,P<0.01).Compared with the DR model group and capsaicin pretreated group,the apoptosis rates of the DR control group (12.4±9.9) % and the capsaicin control group (17.6-±6.1) % were significantly lower (t =8.800,t =4.925,P<0.01).The apoptosis rate of the plain control group was (16.2±6.9)%,exhibiting significant differences in comparison with the DR control group and capsaicin control group (t =-0.989,t =0.951,P>0.05).The specific activity of caspase-3 was (2.19±0.86) in the DR model group and (1.96±0.56) in the capsaicin pretreated group,presenting a significant difference (t =-0.515,P<0.05).Those of the DR control group and capsaicin control group were (1.47±0.14) and (0.74±0.27),respectively,with considerable decline in comparison with the DR model group and capsaicin pretreated group (t=2.142,t=2.797,P<0.05).The retinal and serum CGRP levels were (424.4±44.2)and (148.8±39.1) ng/L,respectively,displaying significantly lower levels than (543.2±74.4) and (237.5±78.7) ng/L (t =3.070,2.359,P<0.05) from the capsaicin pretreated group.Conclusions Apoptosis of retinal ganglion cells occurs in the STZ-induced diabetic rats.Pretreatment of capsaicin reduces retinal cell apoptosis,which may be associated with an increase of CGRP in the retina.
3.Early diagnosis and treatment of diabetic macular edema
Ling, JI ; Ting-Yan, CHEN ; Yong, LIANG
International Eye Science 2014;(10):1809-1811
Diabetic retinopathy ( DR ) is one of the main blinding eye diseases for people over the age of 50, and diabetic macular edema ( DME) is the leading cause of vision loss is DR patients. The early diagnosis and early treatment is important. As OCT and FFA, mfERG, especially the retinal thickness, volume, retinal edema index quantitative indicators such as objective evaluation of macular edema, embodies the new progress of retinal imaging technology in recent years. OCT is a non -contact clinical application in recent years, noninvasive, high resolution of ophthalmic imaging examination, can do it on retinal ultrastructure observation and quantitative analysis, and the technology is relatively mature, become a routine inspection diagnosis of macular edema. Laser photocoagulation, intravitreous injection with Ranibizumab and vitrectomy is nowadays the important means for the treatment of intractable macular edema.
5.Effects of Hypericum perforatum L. extract on anti-stress response. In normal mice and antioxidant activity in exhaustive exercise mice.
Ting-Ting YE ; Le LI ; Ying-Ying LIAO ; Ji-Zhong YAN ; Sheng-Qiang TONG
Chinese Journal of Applied Physiology 2014;30(4):332-334
Animals
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Antioxidants
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metabolism
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Fatigue
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blood
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Female
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Hypericum
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chemistry
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Male
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Mice
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Mice, Inbred ICR
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Physical Conditioning, Animal
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Plant Extracts
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pharmacology
6.Inhibitory effect of LZJ541, a novel small molecule inhibitor of STAT3, on the proliferation of hepatocellular carcinoma cells
Yi-chen LIU ; Ming JI ; Ting-ting DU ; Wen-qiang LIU ; Li LI ; Xiao-guang CHEN
Acta Pharmaceutica Sinica 2022;57(5):1396-1401
Signal transducer and activator of transcription 3 (STAT3) is an important regulatory factor of cell proliferation and metastasis, involved in the occurrence and development of a variety of malignant tumors, and it is one of the hot spots in the research of targeted anti-tumor drugs. Our group screened a novel benzobis (imidazole) structure small molecule compound LZJ541 through the screening model of Janus kinase (JAK)/STAT3 pathway inhibitors, which has definite STAT3 inhibitory activity. We examined the effect of LZJ541 on the proliferation of HepG2 and PC-3 cells by MTT assay
7.Intervention effect of lecithin on cell membrane injury of African green monkey kidney exposed to sodium arsenite in vitro
Ting-ting, WANG ; Ya-lou, ZHANG ; Ji-wen, LIU ; Sheng-ling, WANG
Chinese Journal of Endemiology 2011;30(4):399-402
Objective To observe the lecithin's effect on membrane of African green monkey kidney cells (Vero) exposed to sodium arsenite(NaAsO2). Methods Vero cells cultured in vitro were divided into 4 groups:control group (saline), model group (2.20 mg/L NaAsO2), high eoncentration of lecithin and arsenic group (53.33mg/L lecithin + 2.20 mg/L NaAsO2), low eoncentration of lecithin and arsenic group( 13.32 mg/L lecithin + 2.20 mg/L NaAsO2), 6 bottles of cells in each group, medium was changed every 2 days, cultured for 120 h. Na+ ,K+-ATPase activities of membrane were measured by spectrophotometry, and membrane phospholipids composition including phosphatidylserine (PS), phosphatidylethano-lamine (PE), phosphatidylcholine (PC) and sphingmyelin (SM) were measured by high performance liquid chromatography (HPLC). Results The Na~, K+-ATPase activities of membrane of control group, model group, high concentration of lecithin and arsenic group, low concentration of lecithin and arsenic group were (0.962 ± 0.081) × 106, (0.544 ± 0.037) × 106, (0.647 ± 0.043) x 106, (0.550±Compared with control group, the Na+ ,K+-ATPase activities of other 3 groups were significantly reduced (all P < 0.05). Compared with model group, the Na+ ,K+-ATPase activity in high concentration of lecithin and arsenic group was significantly higher (P < 0.05),but in low concentration of lecithin and arsenic group did not change significantly (P > 0.05). Compared with control group[(0.087 ± 0.003), (0.127 ± 0.053), (0.588 ± 0.105),(0.071 ± 0.029)g/L], PS, PE, PC, SM levels in model group[(0.051 ± 0.018), (0.073 + 0.030), (0.240 ±0.038), (0.047 ± 0.121 )g/L] were significantly lower(all P < 0.05) ;PS, PE, PC in high concentration of lecithin and arsenic group[(0.084 ± 0.011), (0.109 ± 0.363), (0.591 ± 0.476)g/L] did not change significantly(all P > 0.05), but SM[(0.057 ± 0.004)g/L] significantly decreased(P < 0.05) ;PS, PE, SM levels of low concentration of lecithin and arsenic group[(0.058 ± 0.020), (0.086 ± 0.177), (0.048 ± 0.103)g/L] significantly reduced (all P < 0.05), the PC did not change significantly [(0.521±0.098 )g/L, P > 0.05]. Compared with model group,the levels of PS, PE, PC, SM in high concentration of lecithin and arsenic group were significantly higher(all P <0.05);PS, PE, SM levels in low concentration of lecithin and arsenic group did not change significantly(all P > 0.05), and PC was significantly higher(P < 0.05). Conclusions High concentration lecithin has certain protective effect on Vero cell membrane exposured to sodium arsenite.
8.Atrioventricular nodal reentrant supraventricular tachycardia of slow and rapid pathways position in a child with atrial septal defect of primary and secondary opening reversed by radiofrequency catheter ablation.
Jia-feng LIN ; Jia-xuan LIN ; Kang-ting JI
Chinese Journal of Pediatrics 2009;47(9):718-719
9.Simultaneous Determination of Four Chemical Components in Carthamus tinctorius L. by HPLC
Ting HE ; Keao LI ; Zhihong JI ; Shuge TIAN
Chinese Journal of Information on Traditional Chinese Medicine 2017;24(4):79-82
Objective To establish an HPLC method for the simultaneous determination of hydroxysafflor yellow A, rutin, quercetin, and kaempferol in Carthamus tinctorius L..Methods The Agilent ZORBAX SB-C18 column (4.6 mm × 250 mm, 5 μm) was used with diode array detection. The mobile phase was 0.5% phosphoric acid (A) and methanol (B) to separate the four components by gradient elution at 30℃; the flow rate was 0.8 mL/min; the injection Volume was 10 μL; the detection wavelength was at 360 nm.Results The linear ranges of hydroxysafflor yellow A, rutin, quercetin, and kaempferol were 0.0776–0.7760 μg (r=0.9999), 0.0460–0.4600 μg (r=0.9996), 0.0064–0.0640 μg (r=0.9999) and 0.0128–0.1280 μg (r=0.9997), respectively. The average recoveries of four components were 99.68% with RSD=2.29% (n=6), 99.78% with RSD=1.52% (n=6), 102.03% with RSD=1.02% (n=6), 97.03% with RSD=2.05% (n=6), respectively.Conclusion The method is convenient, accurate, sensitive, stable and repeatable, which can be a method for quality control of Carthamus tinctorius L..
10.The research on peripheral circulation and oxygenation of different colloid osmotic pressure level in pediatric cardiac surgery under cardiopulmonary bypass
Ting WU ; Guoning SHI ; Peng CHEN ; Zhenhua JI ; Shu WANG
Chinese Journal of Thoracic and Cardiovascular Surgery 2017;33(2):98-102
Objective To discuss the influence on peripheral circulation and oxygenation of different colloid osmotic pressure (COP) in pediatric cardiac surgery under cardiopulmonary bypass (CPB).Methods Sixty cases of non-cyanotic congenital heart disease patients under 10 kg were randomly selected and divided into 3 groups(n =20) according to the different COP level.COP values was adjusted by the ultrafiltration technique and colloid addition.The perioperative(T1-T6) arterial lactate level,different value between skin and rectal temperature,peripheral oxygen saturation (SpO2) and oxygenation index (OI) were observed in order to determine the different effect on peripheral circulation and oxygenation.Meanwhile,mechanical ventilation time and ICU time were recorded.Results The variation tendency of arterial lactate level was similar in each group,the value in the COP > 18 mmHg (1 mmHg =0.133 kPa) group(group C) was significantly higher than COP 10-15 mmHg group (group A) and COP 16-18 mmHg group (group B) in T3 and T4,after CPB weaned,the values of Group A (1.25 ± 0.42) and Group C (1.33 ± 0.51) were higher than Group B (0.71 ± 0.29) at T6 point (P < 0.05);the variation tendency of SpO2 was similar in each group too,the value of group C was significantly lower than group A and B at T5 point,the values of group A and C were significantly lower than group B at T6 point,P < 0.05;the different value between skin and rectal temperature in group A was significantly higher than group B and C from T1 to T2 point(P <0.05),but not in T3 to T6 point;The minimal OI values of all the groups were appeared in T4 point,group B value was significantly higher than A and C in all time point,group C value was the lowest(P <0.05);the mechanical ventilation time in group B(2.13 ± 1.36) days and group C (2.93 ± 1.69) days were significantly lower than group A (3.83 ± 1.47) days,P < 0.05.ICU time of group B (3.9 ± 1.1) days was significantly lower than group A (5.7 ± 2.5) days and C (6.0 ± 1.5) days.Conclusion During the pediatric CPB,the improper COP level will lead to bad oxygenation and poor peripheral circulation,got different prognosis ultimately.A reasonable COP level(16-18 mmHg) will do benefits to all the pediatric patients.