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Objective To investigate the therapeutic effect and mechanism of non-mitogenic acid fibroblast growth factor 1( NMFGF1) on diabetic cardiomyopathy ( DCM) by using PEG-modified nano-liposomes combined with ultrasound-targeted microbubble destruction technique ( UTMD ) . Methods The NMFGF1 loaded PEG-modified nano-liposomes were prepared by a water-in-water emulsion method and their quality inspections were also investigated. Type 1 diabetes animal model was induced by intraperitoneal injection of streptozotocin ( 70 mg/kg) in male SD rats. The diabetic rats were raised twelve weeks after the diabetes model was established and DCM rats were selected by ultrasonic heart function examination. After two weeks of intervention, all rats were kept for another two weeks and then underwent transthoracic echocardiography examination. The rats were sacrificed and myocardial tissue was obtained to quantify myocardial collagen fraction ( CVF ) and cardiac myocyte apoptotic index by Sirius red staining and TUNEL staining. Results NMFGF1-loaded PEG-nano-liposomes showed a good morphology and 90.3％± 1.4％ NMFGF1 encapsulation efficiency. Compared with DCM group, NMFGF1group, and NMFGF1-PEG-nano-liposomes group, NMFGF1-loaded PEG-nano-liposome plus UTMD group showed increased left ventricular end diastolic diameter (LVIDd) [(7.36±0.42) vs (5.75±0.24), (6.64±0.27), (6.72±0.24)mm, all P<0.05]and leftventricularfractionshortening(LVFS) [(50±3) vs (33±2), (44±5), (43±3)mm, all P<0.05], and decreased left ventricular posterior wall thickness (LVPW) [(1.65±0.07) vs (1.89±0.08), (1.73±0.11), (1.73 ±0.07) mm, all P<0.05], with decreased CVF and apoptotic index(all P<0.05). Conclusion PEG-nano-liposomes combining with UTMD technique has a greater translational potential in the delivery of NMFGF1 for the treatment of DCM by attenuating oxidative stress-induced injury and may provide a promising strategy for treating diabetes cardiomyopathy.
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Objective To investigate the value of shear wave elastography (SWE) indirect evaluation on parotid function in Sjogren syndrome (SS) patients.Methods According to parotid function evaluated with scintigraphy,100 SS patients were divided into normal group,mild group,moderate group or severe group.SWE was performed in all the patients,and Young's modulus of parotid gland was obtained.The difference of Young's modulus among the four groups were compared,and the correlation between Young's modulus and paratid gland function were analyzed.ROC curve was used to evaluate the efficacy of Young's modulus in diagnosis of severe parotid function damage.Results The difference of Young's modulus among four groups was statistically significant (F=78.60,P＜0.001).Young's modulus increased with the damage severity of parotid function (rs =0.83,P＜0.001).Taking 38.38 kPa as threshold,the area under ROC curve of Young's modulus was 0.93 (P＜0.001) in diagnosis of severe parotid function damage and the sensitivity and specificity was 89.3％ and 84.7％,respectively.Conclusion SWE can indirect evaluate parotid function in SS patients,and is valuable in diagnosis and long-term follow-up of SS.
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Objective To investigate the advanced preventive effect of acid fibroblast growth factor (aFGF) on diabetic cardiomyopathy(DCM) by using heparin-modified nano-liposomes combined with ultrasoundtargeted microbubble destruction technique (UTMD).Methods aFGF-loaded nano-liposomes (aFGF-lips) were prepared by lyophilization technique.Type Ⅰ diabetes model was induced by intraperitoneal injection of streptozotocin (STZ,70 mg/kg) in male SD rats.Before and twelve weeks after intervention,all rats underwent the transthoracic echocardiography.The segmental mean peak systolic radial velocity (Vs),systolic circumferential strain (Sc),and systolic circumferential strain rate (SRc) were measured.The expression of aFGF in DCM rats was detected by western blot.The rats were sacrificed and myocardial tissue were stained with masson staining and Tunel staining to quantify myocardial collagen fraction(CVF) and cardiac myocyte apoptosis index(AI).Results aFGF-lips showed good morphology and aFGF encapsulation efficiency (89.4±1.2)％ with high stability.From the animal experiments,the echocardiographic indexes including Vs,Sc and SRc had significantly improvements over DM group (P＜0.05) and all other treatment group (P＜0.05).The Masson's trichrome staining demonstrated that CVF was significantly higher in DM group than in the control group and was significantly lower in the aFGF-loaded nano-liposome+UTMD group than other groups(all P＜0.05).The TUNEL results showed that AI was significantly higher in DM group than in the control group and was significantly lower in aFGF-loaded nano-liposome +UTMD group than other groups (all P＜0.05).Conclusion aFGF nano-liposome combining with UTMD technique can improve the functions and pathologies of the hearts in type 1 diabetes mellitus model,which might provide a novel technique for aFGF in DCM prevention.
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Objective To asses the value of shear wave elastorgraphy(SWE)in the diagnosis of salivary gland manifestation in sjogren syndrome.Methods Seventy-nine patients with suspected diagnosis of Sjogren syn-drome and thirty healthy volunteers were enrolled. aned divided to the SS group,non-SS group and healthy group accoroding to the 2002 American-European Consensus Group.The bilateral parotid and submandibular gland of all patients were examined with shear wave Elastography,then the mean Young's modulus(YM)of bilateral gland were obtained. The differences of Emean between all groups were compared. Receiver operating characteristic curve(ROC)was drawn to evaluate the best cut-off value in diagnosis of Sjogren syndrome. Results The differ-ences of YM between the two sides of parotid gland and submaxillary gland were not statistically significant(P >0.05).On ROC curve,the areas under the curve(AUC),threshold,sensitivity,specificity of the mean YM value in Parotid and Submaxillary gland were 0.921 and 0.916(P<0.05),18.30 and 16.57(kPa),71.7%and 86.8%, 94.4% and 78.5%,respectively. Conclusion The mean YM value of Parotid and Submaxillary gland of Sjogren syndrome can quantitatively assess the gland's elasticity.SWE can provide clincal evidence for diagnosis of sjogren syndrome.
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Objective@#The therapeutic effect of acid fibroblast growth factor 1(FGF1) on rats with diabetic cardiomyopathy (DCM) was evaluated by using nano-liposomes combined with ultrasound-targeted microbubble destruction technique (UTMD).@*Methods@#The FGF1-loaded nano-liposomes were prepared by water-in-water emulsion method combined with lyophilization technique.TypeⅠdiabetes model was induced by intraperitoneal injection of streptozotocin (STZ, 70 mg/kg) in 60 male SD rats.Sixteen weeks later, diabetic rats were randomly divided into: placebo group (saline treatment), FGF1 group, FGF1-loaded nano-liposomes group, and FGF1-loaded nano-liposomes plus UTMD group (n=15 each). After two weeks of intervention followed by 2 weeks intervention stop, all rats underwent cardiac catheterization, and the left ventricular end-systolic pressure (LVESP), left ventricular end-diastolic pressure (LVEDP) and the maximal increase/decrease rate of left ventricular pressure (LV±dp/dtmax) were measured.Then, the rats were sacrificed and myocardial tissue were obtained for Masson trichrome staining, TUNEL apoptotic staining and CD31 immunohistochemistry staining to quantify myocardial collagen fraction (CVF), cardiac myocyte apoptotic index and myocardial microvascular density (MVD).@*Results@#(1)Scanning electron microscope results revealed good morphology and FGF1 encapsulation efficiency (84.3±2.8)% with high stability and dispensability of FGF1 loaded nano-liposomes.(2)The hemodynamic evaluation showed that LVESP, LV + dp/dtmax and LV -dp/dtmax were all significantly higher, while LVEDP was significantly lower in the FGF1-loaded nano-liposome+ UTMD group than in DCM group, FGF1 solution group, and FGF1 nano-liposome group(all P<0.05). (3)The Masson trichrome staining demonstrated that CVF was significantly higher in all DCM groups than in control group and was significantly lower in the FGF1-loaded nano-liposome+ UTMD group than in DCM group, FGF1 solution group, and FGF1 nano-liposome group (all P<0.05). (4)The CD31 immunohistochemical staining results showed that MVD was significantly lower in all DCM groups than in control group and was significantly higher in the FGF1-loaded nano-liposome+ UTMD group than in DCM group, FGF1 solution group, and FGF1 nano-liposome group (all P<0.05). (5)The TUNEL results showed that apoptotic index was significantly higher in all DCM groups than in control group and was significantly lower in the FGF1-loaded nano-liposome + UTMD group than in DCM group, FGF1 solution group, and FGF1 nano-liposome group (all P<0.05).@*Conclusion@#FGF1 nano-liposomes combining with UTMD technique can significantly improve cardiac functions and attenuate myocardial CVF and apoptosis and enhance myocardial MVD in DCM rats.
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Purpose To evaluate the value of acoustic radiation force impulse (ARFI) imaging in the diagnosis of SjOgren's syndrome (SS).Materials and Methods Sixty-four cases of outpatients or inpatients with xerophthalmia or xerostomia in the Department of Rheumatology and Immunology of the First Affiliated Hospital of Nanchang University from September 2015 to April 2016 were collected.According to American-European Consensus Group criteria of 2002,the subjects were divided into SS group (n=38) and nonSS group (n=26).The bilateral parotid gland and submandibular gland were examined by ARFI imaging,and the shear wave velocity (SWV) value was obtained.The differences in SWV values between the left and right sides of the parotid gland or submandi-bular gland and between the SS group and the non-SS group were analyzed.Results ① The SWV values between two sides of parotid glands or submandibular gland in SS group or non-SS group showed no significant differences (P＞0.05).The difference of SWV between the two groups was statistically significant (P＜0.05).② According to the ARFI imaging of parotid gland,the optimal cutoffvalue,sensitivity,specificity,Youden index and ROC area under the curve were 1.99 m/s,86.3％,80.8％,0.671 and 0.879,respectively.③ According to the ARFI imaging of submandibular glands,the optimal cutoff value,sensitivity,specificity,Youden index and ROC area under the curve were 2.13 m/s,79.5％,80.8％,0.603 and 0.878,respectively.Conclusion The ARFI imaging can provide the SWV value of salivary glands to quantify the elasticity of salivary glands in SS,which has great value in the diagnosis of SS.
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Objective To explore the value of salivary glands ultrasonography in diagnosis of Sj(o)gren's syndrome (SS).Methods Ninety-two patients with symptoms of xerophthalmia or xerostomia were enrolled,and 42 of them were divided to the SS group and the others to non-SS group.The bilateral parotid and submandibular gland of all patients were examined with ultrasonography,then the ultrasonographic features of bilateral salivary glands were obtained.The imaging features of salivary glands were evaluated by a semi-quantitative scoring system.The differences of ultrasonography scores between SS group and non-SS group were compared.The value of semi-quantitative scoring system in diagnosis of SS was analyzed.Results Salivary gland ultrasonic manifestations of 38 patients (38/50,76.00％) in non-SS group were normal,whose ultrasonographic scores were 0.Whereas the ultrasound of 32 patients (32/42,76.19％) were abnormalities in SS group,whose ultrasonographic scores were ≥1.Ultrasonographic scores in SS group were higher than that of non-SS group (P＜0.001).The area under the ROC curve of ultrasound score in diagnosis of SS was 0.805 (P＜0.001,95％ confidence interval was [0.711,0.899]).When the cutoff value of the scores was 2,the sensitivity and specificity were 59.5 ％,and 92.0％.Conclusion The ultrasonographic scoring of salivary glands can provide a semi-quantitative index for inhomogeneity of the salivary glands,which has significant value in the diagnosis of SS.
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Objective To assess the effect of clomiphene citrate(CC)on the proliferative stage of endometrium by the addition of low-doge estrogen(progynova,PGV)and aspirin.Methods Sixty women with unexplained infertility were divided into 4 groups randomly.Untreated group,CC treated group(C group),CC+PGV treated group(CE group)and CC+PGV+aspirin treated group(CEA group),each group Was 15 cases.Endometrium thickness,pattern of endometrium and resistant index(RI)of uterine artery were detected by ultrasound,all at end proliferative stage of endometrium.Results The endometrium thickness,the rate of the endometrium thickness≥8 mm and the rate of A-endometrium in C group were significantly less than those in other 3 groups(P<0.05).The rate of A-endometrium in CE group was significantly less than that in untreated group and CEA group(P<0.05).The number of follicle diameter≥15 mm in untreated group(1.01±0.25)was signifieantly less than that in other 3 groups(1.56±0.64,1.52±0.70,1.61±0.67)(P<0.os).RI of uterine artery in C group(0.93±0.07)and CE group(0.95±0.04)were significantly higher than that in untreated group(0.81±0.05)and CEA group(0.83±0.03)(P<0.05).Conclusion Low-dese estrogen can reverse the deleterious effect of CC on.endometrial development,and low-dose estrogen and aspirin can promote uterine perfusion and improve uterine compatibility.
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Objectives:To introduce a new calibration protocol for clinical reference dosimetry of high energy electron beams published by Radiation Therapy Task Group 51, American Association of Physicists in Medicine. Methods:According to the new protocol, measuring the absorbed dose of 5, 6, 7, 9, 10 and 12 MeV Electrons produced by the Siemens M6740 accelerator of our hospital with the help of the Capintec-192 electrometer and PR 06C chamber. Results:For 7-12 MeV, the discrepancies vary from -0.1% to 0.7% between TG 51 and TG 21, and from -0.3% to 0.4% between TG 51 and JJG1026 91. For 5 and 6 MeV, there are 1.7% and 1.5% discrepancies between TG 51 and TG 21, and -1.6% and 1.7% between TG 51 and JJG1026 91. Conclusions:The new protocol is more accurate and convenient because of its precise rationale and concise formulae.
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Objective:To compare the antibiotic effects of 400 g/L chlorhexidine(CHX) varnish on different teeth surfaces. Methods: 400 g/L chlorhexidine(CHX) varnish was applied onto the left mandibula r first molar once in 5 young volunteers (group 1) or twice with a interval of I week in another 5 (group 2). The right mandibular first molar was served as th e control.Plaque samples from fissure or approximal surface were taken for Str eptococci mutans (S.mutans) detection with routine bacteriologic procedure onc e a week for 16 weeks. Results: In group 1 S.mutans in the plaque in fissue was significantly suppressed from 1 to 4 weeks after the v arnish application (P