ABSTRACT
Objective To analyze the posterolateral minimally invasive plate osteosynthesis (MIPO) in the treatment of medial open fractures of distal tibia and tibial shaft.Methods From May 2016 to September 2017,16 medial open fractures of distal tibia and tibial shaft were treated with posterolateral MIPO at Department of Orthopaedics,The First Affiliated Hospital to Anhui University of Science and Technology.They were 10 men and 6 women,from 22 to 61 years of age(average,36.5 years).According to the Gustilo-Anderson classification,type Ⅰ fracture was identified in 5 patients,type Ⅱ fracture in 6 and type Ⅲ fracture in 5.Initially,all the patients received emergency external fixation or calcaneus traction before open reduction and internal fixation was performed when their conditions of soft tissue allowed.X-ray examination of the ankle joint with anteroposterior and lateral views was performed before and after operation.At the last follow-up,the function of ankle joint was evaluated according to the ankle-hindfoot score of American Orthopaedic Foot and Ankle Society (AOFAS).Results All the 16 patients were followed up for an average of 15.3 months (from 8 to 24 months).Fracture healing was achieved in all after an average time of 26.1 weeks (from 20 to 36weeks).There were no such complications as skin necrosis,wound dehiscence,deep infection,implants exposure or failure,or impingement of the flexor hallucis longus.The AOFAS ankle scores averaged 88.6 points (from 74 to 95 points),giving 9 excellent,6 good and one fair cases.Superficial infection occurred in 2 patients but healed after dressing care.Another case showed 5°varus deformity.Conclusion Application of posterolateral MIPO in the treatment of medial open fractures of distal tibia and tibial shaft can effectively protect the medial soft tissue,reduce postoperative wound complications,and safely expose,reduce and fixate the tibial fragments,leading to satisfactory outcomes.
ABSTRACT
Objective To investigate the effects of precautionary rescue nursing intervention on the nursing quality score and efficacy of rescue for neonates with hypoxic ischemic encephalopathy. Methods One hundred children with neonatal hypoxic ischemic encephalopathy admitted to the First Hospital of Hebei Medical University from January 2017 to December 2018 were enrolled. Fifty children from January to December 2017 were assigned in the routine rescue nursing group; and 50 children from January to December 2018 were in the precautionary rescue nursing group. The routine rescue nursing group received routine rescue nursing; and the precautionary rescue nursing group was given pre-planned rescue nursing intervention. The rescue success rate, rescue time, Apgar score within rescue for 5 minutes, poor prognosis, etc. were recorded in both groups; the infant intelligence development scale was used to evaluate the situation of children's development of IQ in 6 months; a self-made questionnaire was used to investigate the rate of satisfaction in 100 children family guardians; the hospital's self-made Nursing Quality Assessment Form was applied to assess the quality of care of nursing staff. Results The rescue successful rate and the 5-minute Apgar score of the precautionary rescue nursing group were significantly higher than those of the routine rescue nursing group [rescue success rate: 98.0% (49/50) vs. 72.0% (36/50), Apgar score: 8.43±1.28 vs. 5.74±1.39], and the rescue time and poor prognosis rate were significantly lower than those in the routine rescue nursing group [rescue time (minutes):3.18±1.20 vs. 6.78±2.23, poor prognosis rate: 2.0% (1/50) vs. 14.0% (7/50), both P < 0.05]. The 6-month intelligence index and psychomotor index in the precautionary rescue nursing group were significantly higher than those in the routine rescue nursing group (intelligence index scores: 96.43±5.85 vs. 85.40±8.90, psychomotor index scores:97.38±4.03 vs. 78.43±10.22, both P < 0.05). The satisfaction rate in precautionary rescue nursing group was obviously higher than that in the routine rescue nursing group [92.0% (46/50) vs. 76.0% (38/50), P < 0.05]; the rescue technology, rescue efficiency, rescue effect, humanistic care score in precautionary rescue nursing group were significantly higher than those in the routine rescue nursing group (8.12±0.89 vs. 2.74±1.02, 8.23±1.24 vs. 3.01±0.83, 7.80±1.33 vs. 3.44±1.25, 8.03±1.32 vs. 3.29±1.38, respectively all P < 0.05). Conclusion The precautionary rescue nursing intervention used for neonates with hypoxic ischemic encephalopathy can significantly improve the rescue effect, degree of satisfaction to nursing and the quality of nursing care, so that it is worthy to be applied clinically.
ABSTRACT
Objective To observe the effect of mature rehmannia extract on platelet derived growth factor (PDGF) and b-cell lymphoma-2 (bcl-2) 2 in myocardial tissue of rats with myocardial infarction.Methods A total of 30 healthy SD rats were randomly divided into blank group,model group and rehmannia glutinosa group with 10 rats in each group.Myocardial infarction models were established in rats of model group and prepared Rehmannia glutinosa group.The rats in the prepared rehmannia glutinosa group were subcutaneously injected with the extract of the prepared Rehmannia glutinosa 4 g/kg.The rats in the blank group and the model group were subcutaneously injected with the same volume of saline.Once a day for 15 days.The cardiac function was measured by echocardiography in rats.The HE staining was used to observe the histopathological changes of myocardium.The levels of PDGF and Bcl-2 in myocardium were detected by ELISA.The levels of vascular endothelial growth factor (VEGF),basic fibroblast growth factor (BFGF) and CD34 protein were detected by immunoturbidimetry.Results Compared with the model group,the levels of LVDd,LVDs,LVEDs and LVESV in the Rehmannia glutinosa group were significantly decreased (P＜0.05) and LVEF was significantly increased (P＜0.05),while the levels of PDGF (0.53 ± 0.02 g/ml vs.0.35 ± 0.01 g/ml),Bcl-2 (1.04 ± 0.20 g/ml vs.0.84 ± 0.12 g/ml),VEGF (85.24 ± 12.45 pg/ml vs.65.26 ± 10.06 pg/ml),BFGF (86.27 ± 6.56 pg/ml vs.62.26 ± 4.37 pg/ml) and CD34 (102.36 ± 10.52 pg/ml vs.26.37 ± 3.94 pg/ml) in in the Rehmannia glutinosa group were significantly increased (P＜0.05).Conclusions The Rehmannia glutinosa extract can improve the cardiac function of rats with myocardial infarction,Promote the formation of new blood vessels and improve myocardial damage.
ABSTRACT
Objective: To prepare 1% voriconazole ( VCZ) sulfonated butyl ether- β-cyclodextrin ( SBE-β-CD) inclusion com-pound eye drop and study the quality. Methods: VCZ SBE-β-CD inclusion compound was prepared with the molar ratio of VCZ to SBE-β-CD of 1 :1. Sodium chloride was used as the osmotic pressure regulator and benzalkonium bromide was employed as the pre-servative in the preparation of VCZ SBE-β-CD inclusion compound eye drop. The appearance, pH value, content stability and irritation of the eye drop were studied as well. Results:The eye drop was colorless and transparent solution with the pH value of 6. 44 ± 0. 20, 6. 50 ± 0. 15,6. 48 ± 0. 22 the osmotic pressure of (320 ± 4. 62),(316 ± 2. 88),(322 ± 2. 60)MOsm and the VCZ content of 1. 02% g ·ml-1 . The results of accelerated testing and long-term testing showed no notable changes in the quality indices. The eye drop exhibi-ted no significant irritation to the rabbit eyes. Conclusion:VCZ SBE-β-CD inclusion compound eye drop shows the properties of high VCZ content, stable quality and promising safety in eye application, which is worthy of further studies.
ABSTRACT
Objective: To prepare 1% voriconazole ( VCZ) sulfonated butyl ether- β-cyclodextrin ( SBE-β-CD) inclusion com-pound eye drop and study the quality. Methods: VCZ SBE-β-CD inclusion compound was prepared with the molar ratio of VCZ to SBE-β-CD of 1 :1. Sodium chloride was used as the osmotic pressure regulator and benzalkonium bromide was employed as the pre-servative in the preparation of VCZ SBE-β-CD inclusion compound eye drop. The appearance, pH value, content stability and irritation of the eye drop were studied as well. Results:The eye drop was colorless and transparent solution with the pH value of 6. 44 ± 0. 20, 6. 50 ± 0. 15,6. 48 ± 0. 22 the osmotic pressure of (320 ± 4. 62),(316 ± 2. 88),(322 ± 2. 60)MOsm and the VCZ content of 1. 02% g ·ml-1 . The results of accelerated testing and long-term testing showed no notable changes in the quality indices. The eye drop exhibi-ted no significant irritation to the rabbit eyes. Conclusion:VCZ SBE-β-CD inclusion compound eye drop shows the properties of high VCZ content, stable quality and promising safety in eye application, which is worthy of further studies.
ABSTRACT
Objective:To study the effects of voriconazole sulfonated butyl ether-β-cyclodextrin inclusion compound(VCZ-SBE) eye drop on fungal keratitis (FK) in rabbits. Methods:Aspergillus fumigatus was used for the establishment of FK model in rabbits. Totally 48 healthy rabbits were divided into four groups. The 12 right eyes in group A were inoculated with Aspergillus fumigatus with-out any treatment. The 12 right eyes in group B were inoculated with Aspergillus fumigatus,and then treated with 0.5% VCZ-SBE eye drop,those in group C were inoculated with Aspergillus fumigatus,and then treated with 1.0% VCZ-SBE eye drop,and those in group D were inoculated with Aspergillus fumigatus,and then treated with 0.5% fluconazole eye drop. The cornea of normal left eyes in the four groups was used for the blank control. Ulcer grading was performed for all the eyes in 0,1,4,7 and 14 d after the successful es-tablishment of FK model. Every 3 rabbits were sacrificed in 1,4,7 and 14 d,and then the cornea was obtained to evaluate the infiltra-tion degree of inflammatory cells and the invasion depth of hyphae into cornea. Results:After the successful establishment of FK mod-el,the ulcer grading among the groups showed no significant difference(P>0.05). Respectively after the 7,4 and 14-day treatment, the ulcer grading in group B,C and D was notably lower than that in group A (P<0.05). After the 4,7 and 14-day treatment,the ulcer grading,infiltration depth and necrosis degree in group C were all lower than those in group B and D(P<0.05),and after the 7 and 14-day treatment,those in group B were lower than those in group D(P<0.05). Conclusion:Compared with fluconazole eye drop at the same concentration,VCZ-SBE inclusion compound eye drop can decrease the ulcer grading of FK and reduce the infiltration depth in a concentration-dependent manner.
ABSTRACT
Objective:To study the pharmacokinetics of indometacin (IDM) enteric-coated dropping pills.Methods:Beagle dogs were used as the experimental animals and the marketed IDM enteric-coated tablets were applied as the control,the pharmacokinetics of IDM enteric-coated dropping pills was studied after a single oral administration.DAS software was used for the model fit and parameter calculation,and the bioequivalence was also evaluated.Results:Both IDM enteric-coated dropping pills and tablets were fitted a one-compartment model.Compared with those of IDM enteric-coated tablets,the Cmax,Tmax,AUC0-∞and Tlag of IDM enteric-coated dropping pills all showed notable differences (P<0.05),and the former two increased significantly,and the latter two were shortened significantly.The relative bioavailability of the dropping pills was (121.0±7.7)%.Conclusion:Compared with IDM enteric-coated tablets,IDM enteric-coated dropping pills are with significantly enhanced absorption and shortened lag time,which is worthy of further studies and development.
ABSTRACT
Objective: To study the status of indomethacin (IDM) in IDM enteric-coated dropping pills and its interaction with PEG 6000.Methods: IDM, PEG 6000, their physical mixture and IDM enteric-coated dropping pills were respectively studied by DSC, IR, X-ray diffraction and SEM.Results: In the map of DSC, the endothermic peak of IDM enteric-coated dropping pills disappeared at 164℃, and the endothermic peak of PEG 6000 at 57℃ shifted forward.In the map of IR, the carbonyl stretching vibration peak of IDM in IDM enteric-coated dropping pills disappeared, and a new peak appeared at 1 680 cm-1.In the map of X-ray diffraction, there was no diffraction peak in IDM enteric-coated dropping pills.SEM showed the morphology of IDM in the base was much smaller than that of IDM raw material.Conclusion: IDM in IDM enteric-coated dropping pills is dispersed in the matrix with an amorphous or molecular form, and there is hydrogen bond between IDM and PEG 6000.
ABSTRACT
Objective To analyze of the effect of artificial lengthening femoral head replacement in elderly patients with stage Ⅰ of unstable femoral intertrochanteric fracture.Methods 203 patients with stage Ⅰ of unstable femoral intertrochanteric fracture were selected as the research object,and they were taken artificial lengthening femoral head replacement,among which 65caese were male,female in 138 cases.The Harris scoring,SF-36,VAS pain scores on admission,2 weeks after operation,postoperative follow-up limb were counted,and the pain of the affected limb and the hip scores were compared amond 3 time periods.Results All 203 cases of senile patients with follow-up,average operation time was 83.64 minutes,the intraoperative blood loss was 355.41mL.The curative effect was evaluated according to the Harris score,SF-36 and VAS pain scoring criteria,and the Harris scores of the affected limbs at admission,at 2 weeks after the operation and after the follow-up were (28.26 ± 5.50) points,(68.26 ±5.50) points,(93.13 ± 5.31) points,respectively,the differences were statistically significant (t =-71.27,-1 397.55,-46.07,all P ＜ 0.01);The VAS pain scores were (8.19 ± 0.48) points,(3.53 ± 0.71) points,(0.23 ± 0.42) points,respectively,the differences were statistically significant (t =88.06,324.17,60.84,all P ＜ 0.01).The sf-36 scores:physiological [(8.35 ± 1.24) points,(15.23 ± 2.17) points,(19.21 ± 2.12) points],social/family [(7.01 ±1.13) points,(14.12 ± 2.12) points,(19.85 ± 2.24) points],emotional [(4.83 ± 1.01) points,(10.12 ±1.22)points,(14.87 ± 1.32) points],function [(6.35 ± 1.21) points,(13.67 ± 1.87) points,(16.81 ±2.12) points],additional focus [(8.85 ± 1.45) points,(16.38 ± 2.12) points,(20.21 ± 2.42) points],total quality of life [(47.35 ± 4.76) points,(74.69 ± 5.87) points,(89.21 ± 6.12) points],the differences were statistically significant(-39.77,-62.92,-20.21,-44.87,-71.89,-26.79,-45.04,-89.01,-38.25,-45.79,-63.41,-15.29,-45.20,-60.39,-17.54,-52.12,-76.49,-22.58,all P＜0.O1).Conclusion Artificial lengthening femoral head replacement in elderly patients with stage Ⅰ of unstable femoral intertrochanteric fracture has good clinical effect,intraoperative high safety,less postoperative complications,postoperative limb functional recovery is good,and it is worthy of clinical promotion and application.
ABSTRACT
Objective: To study the solubilization of sulfonated butyl ether-β-cyclodextrin (SBE-β-CD) and hydroxypropyl-β-cyclodextrin (HP-β-CD) for voriconazole (VCZ) to lay basis for the preparation of inclusion compounds of VCZ.Methods: The phase-solubility method was used, and the solubilization of SBE-β-CD and HP-β-CD at different concentrations for VCZ was studied at various temperatures and the inclusion constant (K) and such inclusion parameters as ΔG, ΔH and ΔS were calculated.Results: Both SBE-β-CD and HP-β-CD could improve the solubility of VCZ in water, while the solubilization of SBE-β-CD was more significant than that of HP-β-CD at the same concentration under the same temperature.The equilibrium phase-solubility diagram of SBE-β-CD vs VCZ was AN type, and that of HP-β-CD vs VCZ was AL type.With the increase of temperature, K of both β-CD decreased.ΔG, ΔH and ΔS were all negative for the inclusion process.Conclusion: Compared with that of HP-β-CD, the solubilization of SBE-β-CD for VCZ is better.The inclusion is spontaneously formed with exothermic process, and the main acting force is Van der Waals'' force.
ABSTRACT
Programmed cell death plays an important role in cardio protection, and Notch1 was an important factor related to programmed cell death. The role of Notch1 on ischemia myocardium remains unclear.H9C2 myocardial cells were cultured with routine medium, transfected with Notch1 over expression plasmid, Notch1-siRNA-overexpression plasmid and vehicle plasmid for further hypoxic experiment. Condition of hypoxic experiment was 1% oxygen centration and culturing for 12hours, then the cell proliferation activity and apoptosis rate was assessed by MTS kit and flow cytometry, respectively. The expressions of Caspase-3, Caspase-9 and Bcl-2 were determined by RT-qPCR and Western Blot, respectively. Compared with normoxia treatment, hypoxia could decrease H9C2 cell proliferation activity as well as Bcl-2 mRNA expression, and increase cell apoptosis rate as well as Caspase-3 and Caspase-9 mRNA expression. Notch1 activation could increase proliferation activity as well as Bcl-2 mRNA expression, while decrease apoptosis rate as well as Caspase-3 and Caspase-9 mRNA expression. Compared with Notch1 activation H9C2 cells, the opposite effect on programmed cell death was observed in cells with Notch1-siRNA-overexpression plasmid. Targeted activation of Notch1 gene to reduce hypoxia-induced programmed cell death in myocardial cells via up-regulating the expression of Caspase-3 and Caspase-9 and inhibiting the expression of Bcl-2
ABSTRACT
Objective:To prepare N-trimethyl chitosan (TMC)-coated sparfloxacin (SL) nanoliposomes in situ gels(ISG)and in-vestigate the drug release in vitro.Methods:SL liposomes were prepared by a pH gradient method , and then homogenized to nanolipo-somes by high pressure .TMC was used as the coating material to prepare TMC-coated SL nanoliposomes .Poloxamer 407 was used as the gel base, and the optimal amount was selected according to the gelation temperature .TMC-coated SL nanoliposomes ISG was pre-pared using a cold method , and the morphology , size, zeta potential and entrapment efficiency of TMC-coated SL nanoliposomes were studied.A membraneless model was used to study the drug release in vitro, and the result was compared with that of TMC-coated SL nanoliposomes.Results:The optimal amount of poloxamer 407 in the formula was 25%, and the gelation temperature was 23.6℃in the artificial tears and 33 .5℃in the diluted artificial tears .The morphology of TMC-coated SL nanaoliposomes in the ISG was spherical with the mean diameter of (96.8 ±1.5) nm, zeta potential of (46.2 ±1.4) mV and entrapment efficiency of (76.6 ±2.4) %, and the indices had no significant difference when compared with those of TMC-coated SL nanoliposomes .Both the drug release in vitro and gel dissolution profile of TMC-coated SL nanoliposomes ISG exhibited the characteristics of zero-order kinetics, and compared with that of TMC-coated SL nanoliposomes , the sustained release property of the ISG was more significant .Conclusion:TMC-coated SL nanoli-posomes ISG has promising gelation temperature and notable sustained release property .
ABSTRACT
Objective:To prepare indometacin ( IDM) enteric dropping pills and study the drug release in vitro. Methods:Using PEG6000 as the base, the optimal formula and preparation process of IDM dropping pills were screened by an orthogonal design. IDM dropping pills were coated by polyacrylic resin II as the enteric coating material. Compared with the marketed IDM enteric tablets, the drug release of IDM enteric dropping pills in vitro was studied using a suspended basket method. Results:The optimal preparation con-ditions of IDM dropping pills were as follows:the ratio of IDM and base was 1∶3, the dropping speed was 65 drops/min, the dropping temperature was 90℃ and the temperature of the cooling solvent was 5℃. IDM dropping pills and the marketed tablets were both with little drug release in acidic solvent. In pH 6. 8 phosphate buffer solution, IDM enteric dropping pills showed much quicker drug release than the marketed enteric tablets (P<0. 05). Conclusion:IDM enteric dropping pills exhibit enteric effect and quick drug release in vitro, which are valuable to be studied further.
ABSTRACT
Objective:To prepare sirolimus ( SRL) dropping pills to improve SRL solubility and dissolution. Methods:The base of SRL dropping pills was screened. The optimal formula and preparation process were also optimized by orthogonal design. The equi-librium solubility, hygroscopicity and drug release in vitro of SRL dropping pills were studied. Results: PEG6000 was chosen as the base. The optimal preparation conditions of SRL dropping pills were as follows: the ratio of SRL and base was 1∶10, the dropping speed was 65 drops/min, the dropping temperature was 95℃ and the temperature of cooling solvent was 5℃. The equilibrium solubili-ty of SRL dropping pills in different solvents was increased significantly compared with that of SRL. The hygroscopicity of the dropping pills was notable. The drug release in vitro of SRL dropping pills was similar to that of the marketed tablets with quick and complete re-lease. Conclusion:SRL dropping pills exhibit increased solubility and improved dissolution, which are valuable to be studied further.
ABSTRACT
Objective To explore the relationship of plasma NT-proBNP level and severity of chronic congestive heart failure (CHF) and investigate the curative effect and security of meglumine adenosine cyclophosphate (MAC) combined with perindopril on patients with CHF.Methods From June 2011 to June 2013,126 inpatients with chronic congestive heart failure were randomly divided into A group (42 cases,routine therapy),B group (41 cases,routine therapy and perindopril) and C group (43 cases,routine therapy and perindopril plus MAC),all cases treated for 14 days.The left ventricular ejection fraction (LVEF) and left ventricular end-diastolic diameter (LVEDD) by echocardiography and plasma NT-proBNP levels were evaluated before and after 14 days therapy.Results The plasma NT-proBNP levels in NYHA Ⅱ ～ Ⅳ classes were significantly difference compared each other between any two classes (P ＜0.05) and the levels was positively correlated with NYHA cardiac function class and LVEDD (r =0.617,P ＜ 0.01 ; r =0.412,P ＜ 0.01),negatively correlated with LVEF (r =-0.372,P ＜ 0.01).After 14 days therapy,compared with A group,the LVEF and LVEDD significantly improved (P ＜ 0.05) and NT-proBNP level significantly decreased (P ＜ 0.05) in B,C groups; Compared with B group,C group had lower NT-proBNP level (P ＜ 0.05) although no further improvement in cardiac function.Conclusions The plasma NT-proBNP level is correlated closely with the severity of CHF and it is a good examination of diagnose,therapy and evaluating prognosis of CHF.Perindopril may significantly decline plasma NT-proBNP level and improve cardiac function of CHF patients,combined with MAC may further decline plasma NT-proBNP level although not further improved LVEF.Giving MAC and perindopril to patients with CHF was secure and patients tolerated it well.
ABSTRACT
Objective: To explore the risk factors for Type 1 cardio-renal syndrome (CRS1) atfer ST-segment elevation myocardial infarction (STEMI). Methods: A total of 378 patients with STEMI were divided into two groups: a CRS1 group (n=98) and a non-CRS1 group (n=280). Clinical characteristics in the 2 groups were compared, and independent risk factors for CRS1 after STEMI were analyzed, and the effect of emergency Results: In the 378 STEMI patients, CRS1 was found in 98 patients (25.9%). Between the 2 groups, there was significant difference in 12 parameters, including age, history of diabetes, admission mean arterial pressure, admission systolic blood pressure, admission heart rate, Killip classification, left ventricular ejection fraction, baseline serum creatinine, baseline evaluated glomerular ifltration rate (eGFR), emergency PCI, β-blockers and angiotensin converting enzyme inhibitor/angiotensin, receptor antagonist (ACEI/ARB) application (allP0.05). Conclusion: CRS1 is a common complication of STEMI, which is associated with many factors. Immediate revascularization can reduce the incidence of CRS1 in patients with ST-segment elevation myocardial infarction.
ABSTRACT
Objective To develop an HPLC method for determination of content of ergosterol in cultured Cordyceps militaris and natural Cordyceps sinensis. Methods Diamonsil C18(2) column (150 mm×4.6 mm, 5 μm) was used, with methanol-water (98∶2) as mobile phase, column temperature of 25 ℃ , flow rate of 1.0 mL/min, and detection wavelength of 280 nm. Results The linear range of ergosterol was 0.197 7-3.954 9 μg (r=1.000), and avarage recovery rate was 99.51%, RSD was 0.56% (n=9). Conclusion This method is effective, sensitive and accurate with high repeatability and stability, which is helpful for the determination of ergosterol in the cultured Cordyceps and natural Cordyceps.
ABSTRACT
Objective To compare the therapeutic effect of anatomic plate (AP)and locking compression plate(LCP) in treatment of fermoral intertrochanteric fracture in elderly patients. Methods Nineteen and three patients with fermoral intertrochanteric fracture were treated with anatomic plate (AP) and locking compression plate (LCP). The therapeutic effects were compared in the study. Results All operations were done successfully. Of all cases,72 patients were followed up for 5-24 months. Excellence rate: AP was 66. 7% and LCP was 88. 2%.Conclusions AP had significantly low excellence rate with more complications when compared with LCP. LCP could be the first choice in treatment of fermoral intertrochanteric fractures with high excellence rates and few complications.
ABSTRACT
Objective To study the effects and mechanisms of myocardial injury in schistosome-infected mice.To investigate the effects and mechanisms of quercetin on myocardial injury due to the development of hepatic fibrosis after being treated by Praziquantel.Methods Eighty mice were divided into four groups:group A,group B,group C,and group D.Group A,group B,and group C were infected with Schistosoma japonicum cercariae.After 8 weeks,group A was treated with Praziquantel 500 mg/kg for 2 d,group B was treated with quercetin 30 mg/(kg?d) for 8 weeks after being treated with Praziquantel 500 mg/kg for 2 d.Group C was taken as experimental control without any treatment.Group D was taken as normal control.At the week 16,all mice were sacrificed and a part of liver tissue and myocardium tissue were preserved.HE Staining,electric microscope,RT-PCR,and immunohistochemical technique were applied to observing the changes of hepatic and cardiac histopathology,myocardial ultramicrostructure,the expression of myocardial c-fos,c-jun mRNA,and the contents of myocardial transforming growth factor-?1 (TGF-?1),typeⅠand typeⅢcollagen in mice infected with S.japonicum before and after treatments. Results There was different degree of myocardial injury among three groups of experimental control, Praziquantel treatment,Praziquantel combined with quercetin treatment.Praziquantel treatment relieved the degree of hepatic fibrosis and myocardial injury.The content of myocardial c-fos mRNA,c-jun mRNA,TGF-?1,typeⅠand typeⅢcollagen were obviously reduced compared to the experimental control. When Praziquantel treatment combined with quercetin,the degree of hepatic fibrosis and myocardial injury were further relieved.Although the content of myocardial c-fos mRNA,c-jun mRNA,TGF-?1, typeⅠand thypeⅢcollagen were still higher than those in normal control,those were reduced significantly compared to the group treated with Praziquantel.Conclusion Hepatic cirrhosis due to advanced schistosomiasis may lead to cardiac remodeling by stimulating the expression of immediate early gene and promoting the overexpression of TGF-?in myocardium.Anti-fibrosis therapy can reduce the degree of cardiac remodeling.Quercetin may protect myocardium through reducing the degree of hepatic fibrosis and inhibiting the expression of immediate early gene,which could decrease the level of myocardial TGF-?1.