Objective:To observe the change of retinal artery angle in eyes with idiopathic epiretinal membrane (ERM) and to analyze the relationship between retinal artery angle, ERM classification based on optical coherence tomography (OCT), and visual acuity.Methods:A retrospective cross-sectional clinical study. A total of 187 eyes in 187 patients diagnosed with monocular idiopathic ERM (IERM group) in Department of Ophthalmology of Zhejiang Provincial People's Hospital and the Affiliated Eye Hospital of Wenzhou Medical University at Hangzhou from November 2018 to January 2023 were included in the study. The contralateral healthy eyes were included as the control group. All patients underwent best corrected visual acuity (BCVA), fundus photography, spectral-domain OCT, OCT angiography (OCTA) and axial length (AL) measurement. BCVA examination was performed using the standard logarithmic visual acuity chart, which was converted to the logarithm of the minimum angle of resolution (logMAR) visual acuity. The foveal avascular zone (FAZ) area was measured by OCTA. The central macular thickness (CMT) was measured by spectral domain OCTaccording to the grading criteria of ectopic inner foveal layer (EIFL) was divided into stages 1 to 4 with 42, 45, 62, and 38 eyes, and the IERM group was subdivided into stage 1, stage 2, stage 3, and stage 4 groups accordingly. Image J was used to measure the retinal artery angle and the 1/2 retinal artery angle on fundus images. Multiple linear regression analysis was used to analyze the correlation between BCVA and artery angle, 1/2 artery Angle, CMT, FAZ area and AL.Results:Compared with the control group, eyes in IERM group had worse BCVA ( t=9.727), thicker CMT ( t=12.452), smaller FAZ area ( t=-14.329), smaller artery angle ( t=-9.165) and smaller 1/2 artery angle ( t=-9.549). The differences were statistically significant ( P<0.001). With the increase of IERM stage, the artery angle and 1/2 artery angle decreased significantly ( F=21.763, 12.515; P<0.001). There was no significant difference in artery angle and 1/2 artery angle between stage 1 group and stage 2 group, and 1/2 arterial angle between stage 2 group and stage 3 group ( P>0.05). There were significant differences in artery angle and 1/2 artery angle between the other groups ( P<0.05). There were significant differences in CMT and logMAR BCVA among different classification subgroups in IERM groups ( P<0.05). There was no significant difference in FAZ area between grade 3 group and grade 4 group ( P>0.05). There were significant differences in FAZ area between the other groups ( P<0.05). Correlation analysis showed that decreased artery angle ( P=0.013) and increased CMT ( P<0.001) were associated with decreased BCVA. Conclusions:Compared with healthy eyes, the artery angle decreases significantly with the increase of ERM stage. Decreased retinal artery angle is associated with decreased visual acuity in IERM eyes.

Objective: To investigate the refractive progression and associated factors of children of different ages and refractive status, and to provide guidance on myopia prevention and control program formulation and work practice. Methods: A total of 20 kindergartens, primary schools, and secondary schools in 2 districts of Shanghai were selected based on the existing cohort, and baseline data in 2015 and one year follow up data in 2016 were collected from 1 510 children aged 4 to 14, including cycloplegic spherical equivalent refraction (SER), axial length (AL), and corneal curvature. The distribution and progression of SER and AL in children of different ages and refractive status were analyzed, and the influencing factors of SER progression (ΔSER) were explored using multiple linear regression. Results: ΔSER remained relatively stable at age 4 and 5 (average -0.08 to -0.07 D/year), and SER drifted significantly towards myopia (average -0.50 to -0.31 D/year) in all groups older than 6 years, dropping back to -0.44 to -0.33 D/year after age 11; Elongation of AL (ΔAL) was 0.27 to 0.35 mm/year in 4 to 10 years group, and decreased to 0.15 to 0.22 mm/year in 11 to 14 years group. The ΔSER and ΔAL were greatest in the new onset myopes [(-0.90± 0.05 )D, (0.51±0.02)mm], followed by the low myopia group [(-0.68±0.04)D, (0.36±0.02)mm], then followed by the moderate to high myopia group[(-0.49±0.06)D，(0.23±0.03)mm] and the lowest in the hyperopia group[(-0.21±0.02)D, ( 0.26 ±0.01)mm], with a statistically significant difference among these groups ( P <0.05). Age ( β =-0.07), baseline SER ( β = 0.05 ) and ΔAL ( β =-0.78) were independent influencing factors for refractive progression in the 4 to 10 years old group, while ΔAL( β =-1.55) was the only independent influencing factor in the 11 to 14 years old group ( P <0.05). Conclusion The elongation of AL in preschoolers is mostly physiologically and should be prevented from growing beyond the physiological range by increasing outdoor activities. The primary students, as well as students with pre myopia or low myopia are the priority groups for dynamic monitoring and intervention in myopia prevention and control.

Objective: To isolate a bacteriophage against pan-drug resistant Klebsiella pneumoniae in a burn patient, and to study its biological characteristics, genomic information, and effects on bacterial biofilm. Methods: (1) In 2018, pan-drug resistant Klebsiella pneumoniae UA168 (hereinafter referred to as the host bacteria) solution isolated from the blood of a burn patient in Ruijin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine (hereinafter referred to as Ruijin Hospital) was used to isolate and purify the bacteriophage against pan-drug resistant Klebsiella pneumoniae from the sewage of Ruijin Hospital with sewage co-culture method, drip plate method, and double-agar plate method. The bacteriophage was named as phage KP168 and the plaque morphology was observed. (2) The phage KP168 solution was taken for cesium chloride density gradient centrifugation and dialysis, and then the morphology of phage KP168 was observed through transmission electron microscope after phosphotungstic acid negative staining. (3) The phage KP168 solution was taken to determine the lytic ability of the phage KP168 against 20 strains of pan-drug resistant Klebsiella pneumoniae isolated from the burned patients′ blood in Ruijin Hospital by the drip plate method, and then the lysis rate was calculated. (4) The phage KP168 solution at a initial titer of 9.3×10¹¹ plaque-forming unit (PFU)/mL (400 μL per tube) and the host bacteria solution at a concentration of 1×10⁹ colony-forming unit (CFU)/mL (4 mL per tube) were conventionally shaking cultured together for 4 hours at multiplicity of infection (MOI) of 10.000, 1.000, 0.100, 0.010, or 0.001, respectively (1 tube per MOI). The titer of phage KP168 was measured by the double-agar plate method (the measurement method was the same below) to select the optimal MOI. The experiment was repeated three times. (5) The host bacteria solution at a concentration of 1×10⁹ CFU/mL (4 mL per tube) and the phage KP168 solution at an adjusted titer of 5×10⁷ PFU/mL (400 μL per tube) were mixed at the MOI of 0.005. The plaques were counted 0 (immediately), 1, 2, 3, 4, 5, 15, and 30 minutes (1 tube at each time point) after mixing by the double-agar plate method (the counting method was the same below), and the percentage of adsorbed phages was calculated to screen for the optimal adsorption time. The experiment was repeated three times. (6) The host bacteria solution at a concentration of 1×10⁹ CFU/mL (300 μL per tube) and the phage KP168 solution at a titer of 5×10⁸ PFU/mL (60 μL per tube) were mixed at MOI of 0.005 and conventionally shaking cultured after standing for the optimal adsorption time. The phage KP168 titer was measured 0 (immediately), 10, 20, 30, 40, 50, 60, 70, 80, 90, and 100 minutes after culture, and a one-step growth curve was drawn. The experiment was repeated three times. (7) The phage KP168 solution at a titer of 2.5×10¹⁰ PFU/mL was left to stand for 1 hour at 37, 40, 50, 60, or 70 ℃ (3 tubes at each time point, 1 mL per tube) for counting the plaques, and then the thermal stability curve was drawn. SM buffer at a pH values of 5.0, 6.0, 7.0, 7.4, 8.0, 9.0, or 10.0 were added to the phage KP168 solution at a titer of 3.0×10¹⁰ PFU/mL, respectively. The mixed solution was left to stand for 1 hour at 37 ℃ (3 tubes of each pH, each tube containing 100 μL phage KP168 solution and 900 μL SM buffer), and then the plaques were counted, and an acid-base stability curve was drawn. (8) The phage KP168 solution was taken for DNA extraction and sequencing after dialysis as in experiment (2). The whole genome was annotated with Prokka to obtain the coding sequence of phage KP168. Nucleotide′s BLAST function was used to proceed nucleic acid sequence alignment for finding a known phage with the highest similarity to the phage KP168 nucleic acid sequence, and Blastx function was used to translate the coding sequence into protein for its function prediction. The comparison with Antibiotic Resistance Genes Database and Virulence Factors Database was proceeded. (9) In a 96-well plate, at a MOI of 1.000, 0.100, 0.010 or 0.001 (3 wells per MOI), 20 μL phage KP168 solution at a initial titer of 5.8×10¹⁰ PFU/mL was added to 200 μL host bacteria solution at a concentration of 1.5×10⁸ CFU/mL (the same concentration below) for co-cultivation for 48 hours. After 200 μL host bacteria solution was left to stand for 48 hours, 20 μL phage KP168 solution at a titer of 1×10^6, 1×10^7, 1×10^8, 1×10^9, or 1×10¹⁰ PFU/mL (3 wells per titer) was added respectively for action for 4 hours. In both experiments, 200 μL host bacteria solution added with 20 μL SM buffer (3 wells) acted as a negative control, and 220 μL LB culture medium (3 wells) acted as a blank control. Absorbance values were measured by a microplate reader, and inhibition/destruction rates of biofilm were calculated. The experiments were both repeated three times. Results: (1) The plaques of phage KP168 successfully isolated and purified were transparent and round, and its diameter was approximately 1.5 mm. (2) The phage KP168 has a regular polyhedron structure with a diameter of about 50 nm and without a tail. (3) The phage KP168 could lyse 13 of 20 strains of Klebsiella pneumoniae from burned patients, with a lysis rate of 65.0%. (4) When MOI was 1.000, the titer was the highest after co-culturing the phage KP168 with the host bacteria for 4 hours, which was the optimal MOI. (5) After the mixing of the phage KP168 with the host bacteria for 4 minutes, the percentage of the adsorbed phage reached the highest, which was the optimal adsorption time. (6) The one-step growth curve showed that during the lysis of the host bacteria by phage KP168, the incubation period was about 10 minutes, and the lysis period was about 40 minutes. (7) With the condition of 40 ℃ or pH 7.4, the number of plaques and the activity of phage KP168 reached the highest. (8) The genome of phage KP168 was a linear double-stranded DNA with a length of 40 114 bp. There were 48 possible coding sequences. It had the highest similarity to Klebsiella phage_vB_Kp1. The most similar known proteins corresponding to the translated proteins of coding sequences contained 23 hypothetical proteins and 25 proteins with known functions. No resistance genes or virulence factor genes were found. The GeneBank accession number was KT367885. (9) After 48 hours of co-cultivation of the phage KP168 and the host bacteria at each MOI, the inhibition rates of biofilm were similar, with an average of about 45%. After the phage KP168 with a titer of 1×10⁹ PFU/mL acted on the biofilm formed by the host bacteria for 4 h, the destruction rate of biofilm was the highest, reaching an average of 42%. Conclusions In this study, a bacteriophage against pan-drug resistant Klebsiella pneumoniae from a burn patient, phage KP168, is isolated from sewage, which belongs to the tailless phage. It has a wide host spectrum, short adsorption time, and short incubation period, with certain thermal and acid-base stability. Its genomic information is clear, and it does not contain resistance genes or virulence factor genes. It also has an inhibitory effect on the formation of bacterial biofilm and a destructive effect on the formed bacterial biofilm.

Objective To study the time-toxicity and dose-toxicity relationship of hepatotoxicity induced by Paracetamol Tablets (PT),Compound Paracetamol and Amantadine Hydrochloride Tablets (CPAH),Compound Dextromethorphan Hydrobromide Tablets (CDH),and Chaiqin Qingning Capsules (CQC) with single dose in mice.Methods In the Time-Toxicity relationship study,Kunming mice were randomly divided into control,PT,CPAH,CDH,and CQC group,and mice of.each drug administration group were randomly divided into nine subgroups according to the time (1,2,4,8,12,24,48,72 and 96 h after administration) of blood collection.The acetaminophen contents in PT,CPAH,and CDH groups were 425.98 mg/kg,and the dose of CQC group was 3 680.50 mg/kg.In the Dosage-Time relationship study,mice were randomly divided into control,PT,CPAH,CDH,and CQC high,medium and low dose group.The acetaminophen contents of high,medium,and low dose were 266.24,425.98,and 681.57 mg/kg in PT,CPAH,and CDH group,and the dose of CQC group was 1437.70,2300.31,and 3680.50 mg/kg,10 mice in each group,sex in half.Blood was collected 12 h after administration.Animal behavior was observed every day,blood and organs were collected at the corresponding time points,serum alanine aminotransferase (ALT),aspartate aminotransferase (AST),and alkaline phosphatase (ALP) level were detected,and the organs index of spleen and thymus,liver were calculated.Results There were no significant changes of ALT,AST,ALP,and organs index after once ig administration of CQC at dosage of 1437.70 mg/kg to 3680.50 mg/kg in mice.The study on time-toxicity relationship indicated that,after once administration of PT,CPAH,and CDH at 425.98 mg/kg,mice showed toxic symptom such as hypokinesia,dry hair and so on,12 h was the most obvious,24 ～ 72 h disappeared.The level of ALT,AST,and ALP in serum increased and reached to the peak at 12 h and then restored near normality after 72,24,and 24 h in PT,CPAH,and CDH group.Their organ index of liver,spleen and thymus all had no significant changes.The study on the dosage-toxicity relationship indicated that,there were no significant changes of animal behavior,ALT,AST,ALP,and organs index after once ig administration of PT,CPAH,and CDH at 266.24 mg/kg.Obvious liver injury can be induced by the three drugs with dosage of 425.98 to 681.57 mg/kg and the level of ALT,AST,and ALP increased significantly with the increase of dosage.Their liver index increased significantly with dosage of 681.57 mg/kg,but the organs index of spleen,thymus had no significant changes.Conclusion There was no hepatotoxicity after once ig administration of CQC with dosage of 3680.50 mg/kg in mice.Mice were once ig administration ofPT,CPAH,and CDH with a large dose,may induce acute liver injury and show obvious time-toxicity and dose-toxicity relationships.

Objective To study the dose-time-toxicity relationship of hepatotoxicity in mice with multiple administration of Paracetamol Tablets (PT),Compound Paracetamol and Amantadine Hydrochloride Tablets (CPAH),Compound Dextromethorphan Hydrobromide Tablets (CDH),and Chaiqin Qingning capsules (CQC).Methods Mice were randomly divided into control,PT,CPAH,CDH,and CQC high,medium,and low dose groups.The acetaminophen contents of high,medium,and low doses were 266.24,425.98,and 681.57 mg/kg in PT,CPAH,and CDH groups,and the doses of CQC group were 1437.70,2300.31,and 3 680.50 mg/kg,ig administration,once daily for 5 d.General state and toxicity of mice were observed.The changes of ALT,AST,AKP,TBIL,and ALB levels in serum and organ indexes of liver,spleen,thymus,and kidney were tested on day 1,3,7,11,and 14 after multiple administration.Results CQC with the dosage range of 1 437.70-3 680.50 mg/kg to mice within 14 d,has not yet induced the increase of AST,ALT,AKP,TBIL,and ALB levels and changes of organ indexes of liver,thymus spleen,and kidney compared with normal control (P ＞ 0.05).PT,CPAH,and CDH with repeated dose of 425.98-681.57 mg/kg could induce significant increase of the levels ofALT,AST,AKP,and TBIL which reached the peak on day 1 (P ＜ 0.05),and then gradually decreased on day 3-14.The level of ALB significant decreased on day 1-11 (P ＜ 0.05),and then gradually recovered on day 11-14.The liver index significant increased on day 1-3 (P ＜ 0.05),and recovered on day 7-14.Conclusion Multiple administration of CQC could not induce liver injury in mice within 14 d,while multiple administration ofPT,CPAH,and CDH could induce hepatotocixity in mice with a certain dose,and show an obvious dose-time-toxicity relationship.

Objective To investigate the "dose-time-toxicity" relationship of liver injury in mice induced by multiple dose of Chaiqin Qingning Capsule and Ganmaoling capsule. Methods Three hundred and ten healthy SPF mice were divided into 7 groups randomly, in which 3 groups were low, medium and high dose subgroups of Chaiqin Qingning capsule ( 50 mice with male and female half in each subgroup) . The doses of Chaiqin Qingning capsule subgroups were 1437. 70, 2300. 31 and 3680. 50 mg/kg, which were 1. 63 , 1. 64 and 1. 65 times of clinically equivalent dose ( ED) respectively. Three groups were low, medium and high dose subgroups of Ganmaoling capsule (50 mice with male and female half in each subgroup). The doses of Ganmaoling capsule subgroups were 1452. 31, 2251. 08 and 3489. 18 mg/kg, which were 1. 553 , 1. 554 and 1. 555 times of ED respectively. One group was the normal control group (10 mice, half were male). Each subgroup mice were treated with intragastric administration of the corresponding concentration drug suspension by 0. 20 ml per 10 g body weight, and the normal control group mice were treated with intragastric administration of equal volume of distilled water. All mice were treated once daily for 14 days. The general state of mice in each group was observed during the experiment. Ten mice randomly selected on the 1st, 3rd, 7th, 11th and 14th day after multiple administration of the medicine in each subgroup respectively and 10 mice in the normal control group after 14 days multiple administration of distilled water were weighed, and the serum alanine aminotransferase ( ALT) , aspartate aminotransferase (AST), alkaline phosphatase (ALP), albumin (ALB) and total bilirubin (TBil) levels were tested. Then the mice were executed and the organs, i. e. , liver, thymus, and spleen were taken to weigh and calculate the organ index. Results The general state of mice in the normal control group, Chaiqin Qingning capsule subgroups and Ganmaoling capsule low dose subgroup were not abnormal during the administration period. Ganmaoling capsule high dose subgroup appeared 8 mice died within 1 day after first administration, the overall mortality rate was 16%. The high dose and medium dose subgroup of mice showed decrease in activities, dietary, water and body weight significantly on 1st to 3rd day. The symptoms gradually disappeared on 4th to 7th day, and the state gradually returned to normal on 8th to 14th day. The difference of serum level of ALT, AST, ALP, ALB, TBil and liver, thymus and spleen organ index of Chaiqin Qingning capsule subgroups and Ganmaoling capsule low dose subgroup on the 1st, 3rd, 7th, 11th and 14th days after multiple administration compared with those of the normal control group were not statistically significant (all P>0. 05). The levels of serum ALT, ALP and TBil of Ganmaoling capsule high dose subgroup mice after multiple administration on 1st, 3rd, 7th day and the serum AST of mice on 1st and 3rd day were significantly higher than those in the normal control group (P<0. 05, P<0. 01). The serum ALB level of Ganmaoling capsule high dose subgroup mice on 3rd, 7th, 11th and 14th day were significantly lower than those in normal control group (P<0. 05, P<0. 01). The levels of serum ALT, AST, ALP and TBil of Ganmaoling capsule medium dose subgroup mice after multiple administration on 1st and 3rd day were significantly higher than those in the normal control group (P<0. 05, P<0. 01). The serum ALB level of Ganmaoling capsule medium dose subgroup mice after multiple administration on 3rd and 7th day were significantly lower than those in normal control group (P<0. 05, P<0. 01). The liver organ index of mice in Ganmaoling capsule high dose subgroup after multiple administration on 1st , 3rd and Ganmaoling capsule medium dose subgroup after multiple administration on 1st day were significantly higher than that in the normal control group (all P<0. 01). Conclusions Multiple intragastric administration of Chaiqin Qingning capsule in different doses did not induce significant hepatotoxicity. Multiple intragastric administration of Ganmaoling capsule in medium dose or high dose could induce hepatotoxicity in mice, and showed an obvious "dose-time-toxicity" relationship.

Objective To investigate the "dose-time-toxicity" relationship of liver injury in mice induced by multiple dose of Chaiqin Qingning Capsule and Ganmaoling capsule. Methods Three hundred and ten healthy SPF mice were divided into 7 groups randomly, in which 3 groups were low, medium and high dose subgroups of Chaiqin Qingning capsule ( 50 mice with male and female half in each subgroup) . The doses of Chaiqin Qingning capsule subgroups were 1437. 70, 2300. 31 and 3680. 50 mg/kg, which were 1. 63 , 1. 64 and 1. 65 times of clinically equivalent dose ( ED) respectively. Three groups were low, medium and high dose subgroups of Ganmaoling capsule (50 mice with male and female half in each subgroup). The doses of Ganmaoling capsule subgroups were 1452. 31, 2251. 08 and 3489. 18 mg/kg, which were 1. 553 , 1. 554 and 1. 555 times of ED respectively. One group was the normal control group (10 mice, half were male). Each subgroup mice were treated with intragastric administration of the corresponding concentration drug suspension by 0. 20 ml per 10 g body weight, and the normal control group mice were treated with intragastric administration of equal volume of distilled water. All mice were treated once daily for 14 days. The general state of mice in each group was observed during the experiment. Ten mice randomly selected on the 1st, 3rd, 7th, 11th and 14th day after multiple administration of the medicine in each subgroup respectively and 10 mice in the normal control group after 14 days multiple administration of distilled water were weighed, and the serum alanine aminotransferase ( ALT) , aspartate aminotransferase (AST), alkaline phosphatase (ALP), albumin (ALB) and total bilirubin (TBil) levels were tested. Then the mice were executed and the organs, i. e. , liver, thymus, and spleen were taken to weigh and calculate the organ index. Results The general state of mice in the normal control group, Chaiqin Qingning capsule subgroups and Ganmaoling capsule low dose subgroup were not abnormal during the administration period. Ganmaoling capsule high dose subgroup appeared 8 mice died within 1 day after first administration, the overall mortality rate was 16%. The high dose and medium dose subgroup of mice showed decrease in activities, dietary, water and body weight significantly on 1st to 3rd day. The symptoms gradually disappeared on 4th to 7th day, and the state gradually returned to normal on 8th to 14th day. The difference of serum level of ALT, AST, ALP, ALB, TBil and liver, thymus and spleen organ index of Chaiqin Qingning capsule subgroups and Ganmaoling capsule low dose subgroup on the 1st, 3rd, 7th, 11th and 14th days after multiple administration compared with those of the normal control group were not statistically significant (all P>0. 05). The levels of serum ALT, ALP and TBil of Ganmaoling capsule high dose subgroup mice after multiple administration on 1st, 3rd, 7th day and the serum AST of mice on 1st and 3rd day were significantly higher than those in the normal control group (P<0. 05, P<0. 01). The serum ALB level of Ganmaoling capsule high dose subgroup mice on 3rd, 7th, 11th and 14th day were significantly lower than those in normal control group (P<0. 05, P<0. 01). The levels of serum ALT, AST, ALP and TBil of Ganmaoling capsule medium dose subgroup mice after multiple administration on 1st and 3rd day were significantly higher than those in the normal control group (P<0. 05, P<0. 01). The serum ALB level of Ganmaoling capsule medium dose subgroup mice after multiple administration on 3rd and 7th day were significantly lower than those in normal control group (P<0. 05, P<0. 01). The liver organ index of mice in Ganmaoling capsule high dose subgroup after multiple administration on 1st , 3rd and Ganmaoling capsule medium dose subgroup after multiple administration on 1st day were significantly higher than that in the normal control group (all P<0. 01). Conclusions Multiple intragastric administration of Chaiqin Qingning capsule in different doses did not induce significant hepatotoxicity. Multiple intragastric administration of Ganmaoling capsule in medium dose or high dose could induce hepatotoxicity in mice, and showed an obvious "dose-time-toxicity" relationship.

[ ABSTRACT] AIM:To investigate the effect of triptolide on the inhibition of microglial activation in 1-methyl-4-phenyl pyridinium ( MPP+)-induced hemiparkinson disease rats.METHODS:The rat model of Parkinson disease was es-tablished by intranigral injection of MPP +.The rats were randomly divided into sham group, MPP+group, triptolide group and vehicle group.The survival of dopaminergic neurons was detected by the immunofluorescence of tyrosine hydroxylase ( TH) in the substantia nigra ( SN) .The activation of microglia was determined by immunofluorescence of OX-42 ( micro-glia marker) in the SN.The expression of chemokine receptor CX3CR1 in SN was measured by Western blotting.RE-SULTS:Intranigral injection of MPP+increased the fluorescence intensity of the microglial marker, and promoted DA neu-ron degenerative death.Immunohistological analysis showed that the OX-42 density was decreased (P<0.01) and tyrosine hydroxylase (TH) positive neurons were increased in the triptolide group (P<0.01).The expression of CX3CR1 was lower in triptolide group than that in model group (P<0.05).CONCLUSION:Triptolide may improve PA neurons func-tion in MPP+-induced rats through inhibiting CX3CR1 expression and microglial activation.

Objective To investigate the neuroprotective effect of Dengzhan Shengmai capsule (DZSM) in rat cerebral ischemia-reperfusion injury and to explore the mechanism. Methods Rats were divided into Sham group, MCAO group, DZSM group, carbenoxolone (CBX) group and DZSM + CBX group. Each group was assessed for neurological function , infarct volume and the expression of Caspase-3 48 h after reperfusion. Connexin 43 (Cx43) expression of MCAO group was detected 3, 12, 24, 48 h after reperfusion. Results There were lower neurological deficit scores , infarct volume and the expression of Caspase-3 in DZSM , CBX and DZSM + CBX group 48 h after reperfusion when compared with those in MCAO group (P < 0.05) but Cx43 expression level in each group increased after reperfusion at each time point (P < 0.05). Expression of Cx43 was lower in DZSM, CBX and DZSM + CBX group than that in MCAO group (P < 0.05). Lower expression of Cx43 was also seen in CBX and DZSM + CBX group when compared with that in DZSM group (P < 0.05). Conclusion DZSM capsule can improve neurological function , reduce infarct volume and inhibit the expression of Caspase-3. The mechanism may be related to its inhibition of Cx43 expression.

AIM:To investigate the integrative treatment of both coenzyme Q 10 ( CoQ10 ) and minocycline in the rats intranigrally intoxicated with 1-methyl-4-phenylpyridinium ( MPP+) .METHODS:The rat model of Parkinson disease ( PD) was established by intranigral microinjection of MPP +.The degree of microglial activation was measured by immuno-fluorescent density of OX-42 ( a microglia marker ) in the substantia nigra ( SN) .The number of viable dopaminergic neurons was determined by counting the tyrosine hydroxylase ( TH) positive neurons in the SN .The behavioral performances were re-vealed with the number of apomorphine-induced rotations , score of forelimb akinesia and vibrissae-elicited forelimb placing a-symmetry.RESULTS:Pretreatment with CoQ10 or intracerebroventricular (icv) posttreatment with minocycline alone pro-vided partial attenuation against MPP +-induced locomotor defects .Integrative therapy provided enhanced beneficial effects , and resulted in a significant attenuation of locomotor disability than any single therapy (all P<0.01).The results of immu-nohistological analysis showed that the TH positive neurons were maximally protected by integrative therapy compared with minocycline group and CoQ 10 group (P<0.01) .CONCLUSION:The integrative therapy of CoQ 10 combined with minocy-cline may offer additional therapeutic benefit to MPP +-induced hemiparkinson rat model .Such neuroprotective strategy of tar-geting different aspect of the neurodegenerative phenotypes may highlight a new therapeutic strategy for future management of PD.