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1.
Article in Chinese | WPRIM | ID: wpr-988450

ABSTRACT

Cardiotoxicity is a serious complication of antineoplastic drugs. With the continuous development of antineoplastic drugs, immune checkpoint inhibitors have been used in the treatment of a variety of cancers. PD-1/PD-L1 immune checkpoint inhibitors have been widely concerned in recent years. This article reviews the manifestations and possible mechanisms of cardiotoxicity induced by PD-1/PD-L1 immune checkpoint inhibitors, and the detection methods and treatment of cardiotoxicity.

2.
Article in Chinese | WPRIM | ID: wpr-879486

ABSTRACT

OBJECTIVE@#To carry out genetic diagnosis for a fetus.@*METHODS@#Chromosome G-banding and chromosomal microarray analysis (CMA) were carried out for a fetus with abnormal morphology of lateral cerebral fissure.@*RESULTS@#The karyotype of the fetus was normal, but CMA showed that it has carried a 1.4 Mb deletion at 17p13.3 region, which suggested a diagnosis of Miller-Dieker syndrome (MDS).@*CONCLUSION@#Familiarity with clinical features and proper selection of genetic testing method are crucial for the diagnosis of MDS. Attention should be paid to microdeletions and microduplications which can be missed by conventional chromosomal karyotyping.


Subject(s)
Female , Humans , Pregnancy , Chromosome Banding , Chromosome Deletion , Chromosomes, Human, Pair 17 , Classical Lissencephalies and Subcortical Band Heterotopias/genetics , Fetus , Karyotyping , Prenatal Diagnosis
3.
Chinese Journal of Geriatrics ; (12): 361-364, 2020.
Article in Chinese | WPRIM | ID: wpr-869376

ABSTRACT

Atrial fibrillation is one of the most common arrhythmias.The incidence of atrial fibrillation increases with age.Increased cardiac late sodium currents are closely related to the occurrence of atrial fibrillation, and inhibition of the late sodium current has become a new target for antiarrhythmic therapy.Late sodium current inhibitors play an anti-atrial fibrillation role by inhibiting atrial late sodium currents and may become a new strategy for atrial fibrillation treatment due to their unique mechanisms and satisfactory safety.

4.
Chinese Journal of Cardiology ; (12): 614-621, 2019.
Article in Chinese | WPRIM | ID: wpr-805708

ABSTRACT

Objective@#To investigate the effects and potential mechanisms of tolvaptan on chronic intermittent hypoxia (CIH)-induced atrial remodeling in rats.@*Methods@#A total of 45 Sprague-Dawley rats were divided into 3 groups by the random number table: control group, CIH group (6 h/d for 30 days), CIH plus tolvaptan group (8 mg·kg-1·d-1 per gavage for 30 days). Echocardiography examination was performed after 30 days. Thereafter, 5 rats were randomly chosen for histology evaluation, 5 for molecular biological examinations and another 5 rats underwent isolated heart electrophysiology study in each group. Protein and mRNA expression levels of miRNA-21, Spry1, PTEN, ERK/p-ERK, MMP-9, PI3K, AKT/p-AKT were detected.@*Results@#Compared to the rats in control group, rats in the CIH group showed higher atrial interstitial collagen deposition (P<0.001), increased atrial fibrillation inducibility (P=0.022). The results of immunohistochemistry staining showed that the mean optical density (MOD) of ERK, p-ERK and MMP-9 were significantly increased (all P<0.05), the MOD of Spry1 and PTEN were significantly decreased (both P<0.05), above changes could be significantly reversed by cotreatment with tolvaptan. No significant differences were detected in PI3K and AKT among the three groups (P>0.05). In addition, compared with rats in control group, mRNA levels of miRNA-21, MMP-9, PI3K, AKT, and protein levels of ERK, p-ERK, MMP-9 were significantly increased in CIH group(all P<0.05), whereas protein levels of Spry1, PI3K, p-AKT were significantly decreased (all P<0.05). Above changes could be significantly attenuated.@*Conclusions@#CIH induces significant atrial remodeling in this rat model, which can be attenuated by tolvaptan possibly through modulating miRNA-21/Spry1/ERK/MMP-9 and miRNA-21/PTEN/PI3K/AKT signaling pathways.

5.
Article in English | WPRIM | ID: wpr-773008

ABSTRACT

Microvesicles (MVs, also known as microparticles) are small vesicles that originate from plasma membrane of almost all eukaryotic cells during apoptosis or activation. MVs can serve as extracellular vehicles to transport bioactive molecules from their parental cells to recipient target cells, thereby serving as novel mediators for intercellular communication. Importantly, more and more evidence indicates that MVs could play important roles in early pathogenesis and subsequent progression of cardiovascular and metabolic diseases. Elevated plasma concentrations of MVs, originating from red blood cells, leukocytes, platelets, or other organs and tissues, have been reported in various cardiometabolic diseases. Circulating MVs could serve as potential biomarkers for disease diagnosis or therapeutic monitoring. In this review, we summarized recently-published studies in the field and discussed the role of MVs in the pathogenesis of cardiometabolic diseases. The emerging values of MVs that serve as biomarker for non-invasive diagnosis and prognosis, as well as their roles as novel therapeutic targets in cardiometabolic diseases, were also described.


Subject(s)
Humans , Biomarkers , Metabolism , Cardiovascular Diseases , Blood , Diagnosis , Therapeutics , Cell Communication , Cell-Derived Microparticles , Metabolism , Metabolic Diseases , Blood , Diagnosis , Therapeutics
6.
Chinese Critical Care Medicine ; (12): 416-421, 2018.
Article in Chinese | WPRIM | ID: wpr-703664

ABSTRACT

Objective To investigate the potential effects and mechanism on peroxisome proliferator-activated receptor γ-toll-like receptor 4-tumor necrosis factor-α (PPARγ-TLR4-TNF-α) targeted pathway on hyperglycemia induced myocardium inflammation and oxidative stress. Methods Thirty-two Japanese healthy adult rabbits were randomly divided into four groups with 8 rabbits in each group: normal control group (NC group), diabetes mellitus group (DM group), diabetes mellitus + pioglitazone 4 mg·kg-1·d-1 and 8 mg·kg-1·d-1 groups (DM+PGZ 4 mg and 8 mg groups). DM model was reproduced by alloxan of 150 mg/kg through auricular vein injection. On the same day of successful DM model reproduction, the diabetic rabbits were fed with corresponding dose of pioglitazone in DM+PGZ 4 mg and 8 mg groups, but the rabbits in NC group were not challenged. After 8 weeks of feeding, venous blood of left jugular vein bifurcation and myocardium tissue were harvested respectively for the determination of inflammation and oxidative stress parameters. TNF-α, interleukin-1 (IL-1), adiponectin (ADP), nitric oxide (NO) and total nitric oxide synthase (NOS) levels were determined by enzyme linked immunosorbent assay (ELISA), myeloperoxidase (MPO) activity was determined by colorimetric method, superoxide dismutase (SOD) activity was determined by hydroxylamine method, malondialdehyde (MDA) was determined by thiobarbituric acid colorimetric method, and catalase (CAT) activity was determined by UV spectrophotometry method. In addition, the mRNA expressions of TNF-α and TLR4 were determined by real-time quantitate reverse transcription-polymerase chain reaction (RT-qPCR). Results ① IL-1 and TNF-α in serum and myocardium of model rabbits were significantly increased, ADP was significantly decreased, and the mRNA expressions of TNF-α and TLR4 in myocardium were significantly increased, indicating a significant inflammatory reaction. The inflammatory reaction in pioglitazone intervention groups was significantly reduced, TNF-αand IL-1 levels in serum and myocardium of DM+PGZ 4 mg and 8 mg groups were significantly decreased as compared with those of DM group [serum: TNF-α(ng/L) was 268.33±46.57, 261.34±33.73 vs. 331.40±69.05, myocardium: TNF-α (ng/L) was 144.72±26.90, 139.59±14.59 vs. 177.48±27.40; serum: IL-1 (ng/L) was 24.40±2.56, 23.35±3.13 vs. 30.08±5.44, myocardium: IL-1 (ng/L) was 21.26±2.85, 20.54±2.75 vs. 24.78±3.60, all P < 0.05], and ADP levels were significantly increased [serum (μg/L): 19.64±8.85, 20.54±7.47 vs. 15.45±3.06, myocardium (μg/L): 10.31±2.22, 11.49±3.42 vs. 7.76±1.77, all P < 0.05], and the mRNA expressions of TNF-α and TLR4 in myocardium were significantly decreased (TNF-αmRNA: 0.15±0.05, 0.14±0.06 vs. 0.25±0.09; TLR4 mRNA: 0.57±0.17, 0.40±0.18 vs. 0.75±0.35, all P < 0.05). ②Oxidative stress in serum and myocardium of model rabbits was significantly increased, SOD, NO, and total NOS levels were significantly decreased while the serum CAT and MDA levels were significantly increased without effect on MPO. Compared with the DM group, SOD and NO levels in serum and myocardium were significantly increased in DM+PGZ 4 mg and 8 mg groups [serum: SOD (U/L) was 571.39±40.85, 609.28±54.47 vs. 535.10±37.08, myocardium:SOD (U/mg) was 55.74±8.12, 53.60±9.87 vs. 42.26±12.34; serum: NO (μmol/L) was 2.95±0.51, 2.99±0.43 vs. 2.03±0.78, myocardium: NO (nmol/mg) was 1.95±0.37, 2.11±0.26 vs. 1.56±0.33, all P < 0.05], the serum MDA levels were significantly decreased (μmol/L: 20.11±2.34, 19.70±2.02 vs. 23.07±3.06, both P < 0.05), while no significant effect on CAT. There was no significant difference in parameter of inflammatory and oxidative stress between the two pioglitazone intervention groups. Conclusion 4 mg·kg-1·d-1 pioglitazone could activate PPARγ-TLR4-TNF-α targeted pathway, thus inhibit inflammatory and oxidative stress factors expression, and down-regulate hyperglycemia induced myocardium inflammatory and oxidative stress level, but the effect did not show a dose dependent manner.

7.
Chinese Journal of Geriatrics ; (12): 709-714, 2018.
Article in Chinese | WPRIM | ID: wpr-709340

ABSTRACT

Resveratrol is a non-flavonoid polyphenolic compound which presents in plants such as grapes.It has a variety of physiological effects such as antioxidant ,anti-inflammatory ,anti-cancer , cardiovascular and neurological protection. In cardiovascular disease ,through the anti-inflammatory , anti-oxidation and regulating a variety of factors ,resveratrol involves in atherosclerosis ,hypertension , ischemic heart disease ,heart failure and other cardiovascular disease process ,thus plays a protective function for heart. Related clinical researches are also widely carried out ,and resveratrol may be one of the candidate interventions for prevention and treatment of cardiovascular disease.

8.
Chinese Journal of Sports Medicine ; (6): 1072-1075,1111, 2017.
Article in Chinese | WPRIM | ID: wpr-704356

ABSTRACT

Objective To explore the effect of the temperature-sensitive hydrogel and platelet-rich plasma(PRP)complex on the healing of anterior cruciate ligament (ACL)partial tear in a rat model.Method PRP was processed according to an established method and then mixed with poly(ethylene glycol)monomethyl ether and poly(lactic-co-glycolic acid)(mPEG-PLGA).A total of 110 right knees of Sprague-Dawley male rats (12-week old)were included and randomly divided into a healthy control group (n=10),a lesion control group(n=60)and a study group(n=40).The saline and mPEG-PLGA-PRP complex was applied at the lesion site respectively.Samples were harvested 0,2 weeks and 6 weeks post-operatively and the histological and biomechanical changes were observed and compared among the 3 groups.Results Histologically,at 6 weeks after surgery,the torn ACL of the study group had been partially healed,with decreased number of inflammatory cells and new fibrous tissues and micro-vessels appearing.The ligament maturity index revealed a significantly higher score in the study group than the lesion control group(20.6 ± 4.9 vs.4.7 ± 1.0,P<0.01).Biomechanically,at 6 weeks after surgery,the tensile strength of the study group was significantly higher than the contro] groups(52.7 ± 11.2 vs.30.3 ± 8.8,P<0.05).Conclusion At six weeks after surgery,the mPEG-PLGA-PRP complex can enhance the healing of ACL partial tear,ahhough the ligament was not recovered to the norma] state.

9.
Chinese Journal of Endemiology ; (12): 246-249, 2017.
Article in Chinese | WPRIM | ID: wpr-512508

ABSTRACT

Objective By studying the variation of individual urinary iodine concentration due to different ways of urine sample collection to optimize it for standard clinical evaluation.Methods Totally 20 healthy adults were recruited and their urine samples were collected as a random urine sample within 1 day,the 24 hour urine and morning urine samples within 5 successive days,respectively.The coefficient of variation in each group was calculated.Paired t test was used to compare the results of 24 hour urine with the results of random urine and that of morning urine samples,respectively.Results The range of individual coefficient of variation for random urine sample within one day was 12.5%-57.4%,while most of the coefficients of variation were around 30.39%.In contrast,the individual coefficients of variation of morning urine sample and 24 hour urine results within 5 days were 5.4%-26.0% and 3.4%-16.6% and most of them were at about 11.74% and 7.91%.The paired t test showed that the results of random urine sample were significantly different compared with that of 24 hour urine (t =-4.231,P < 0.05).On the other hand,there was also significant difference for the results of morning urine compared with that of 24 hour urine (t =3.884,P < 0.05).Conclusion This study suggests that 24 hour urine is the most appropriate way of sample collection for individualized detection of urinary iodine.

10.
China Pharmacy ; (12): 1637-1640, 2017.
Article in Chinese | WPRIM | ID: wpr-512574

ABSTRACT

OBJECTIVE:To investigate the effects of simvastatin intensive treatment on the Postoperative Related Indexes of patients with acute coronary syndrome(ACS) underwent percutaneous coronary intervention(PCI). METHODS:106 patients with were included in the study and randomly divided into observation group(53 cases)and control group(53 cases). Both groups were given aspirin 100 mg,qd+clopidogrel 75 mg,qd before PCI for 4 weeks;observation group was additionally given Simvastatin tablet orally 20 mg before supper 15 d before surgery. TC,TG,LDL-C,HDL-C,hs-CRP,IL-6 and IL-18 levels,LVEF,the occurrence of coronary artery restenosis were detected in 2 groups before surgery and 6 months after surgery. The occurrence of ADR was recorded during treatment. RESULTS:There was no statistical significance in the levels of TG,TC,LDL-C and HDL-C between 2 groups before surgery and 6 months after surgery (P>0.05). There was no statistical significance in hs-CRP,IL-18, IL-6 and LVEF levels between 2 groups before surgery(P>0.05). 6 months after surgery,hs-CRP,IL-6,IL-18 and LVEF levels of 2 groups were significantly higher than before treatment;hs-CRP,IL-6 and IL-18 levels of observation group were significantly lower than those of control group,and LVEF was significantly higher than control group,with statistical significance (P<0.05). The incidence of coronary artery restenosis in observation group was significantly lower than control group, with statistical significance (P<0.05). No ADR was found in 2 groups during treatment. CONCLUSIONS:Preoperative simvastatin intensive treatment can effectively reduce cardiovascular inflammation degree in patients with ACS after PCI,prevent the formation of coronary artery thrombus,and reduce the incidence of coronary artery restenosis so as to effectively improve the prognosis and don' t increase the incidence of ADR.

11.
Tianjin Medical Journal ; (12): 763-766, 2017.
Article in Chinese | WPRIM | ID: wpr-611693

ABSTRACT

Atrial fibrillation (AF) is one of the most common arrhythmias in clinical practice.It often causes serious thromboembolic complications,which brings great harm to human health.The incidence and morbidity rates of AF are increasing year by year.The research on the pathogenesis of AF has been focused on the aspects of electrical remodeling and structural remodeling.Atrial electrical remodeling and structural remodeling are the main mechanism of AF for the maintenance and recurrence.The intervention of atrial remodeling is helpful to the treatment of AF.It is found that the rennin-angiotensin aldosterone system (RAAS) plays an important role in atrial remodeling.RAAS blockers can significantly reduce the onset of AF by inhibiting the activation of the renin axis,which can block the activation of RAAS and improve the atrial remodeling.This may provide a new choice for the treatment of AF.This article reviews the research progress of RAAS blocking agent in the prevention and treatment of AF.

12.
Article in Chinese | WPRIM | ID: wpr-615675

ABSTRACT

Objective To explore the spatial-temporal characteristics and changing regularities of Schistosoma japonicum in-fections among human from 2004 to 2011. Methods The township level spatial databases of schistosomiasis in Hunan Province from 2004 to 2011 were established,and the related spatial analysis was performed by SPSS 17.0,ArcGIS 10.1 and SaTScan 7.03. Results The schistosome infection rate among human in Hunan Province sharply decreased from 3.0%in 2004 to 0.8%in 2011. However,the rate among residents in parts of some townships in 2011 was still hovering at a higher level (P90=2.12%),and the higher rate was distributed along the Oncomelania hupensis snail ridden areas outside embankment. The auto-correlation analysis showed that the global Moran's I for schistosome infection rate among human was 0.34 to 0.53 from 2004 to 2011,and was higher than the expected value(Z>8.71,P<0.05). The local G statistics indicated that the positive hotspot high-high clustering areas were mainly near the coast of Dongting Lake from 2004 to 2011,and the number of townships with schistosomiasis endemic in the clustering areas reached 30 to 70. The spatial scan analysis showed that the number of townships in the clustering areas ran up to 145 to 183 from 2004 to 2011. Conclusions The schistosome infection rate among human de-creased significantly in Hunan Province from 2004 to 2011. However,the rate in parts of some townships still remains at a com-paratively high level,and there are positive spatial correlation and spatial agglomerations in the schistosome infection rate among human,suggesting that the prevention and control work on schistosomiasis in these areas should be strengthened in the fu-ture.

13.
Chongqing Medicine ; (36): 4955-4957, 2017.
Article in Chinese | WPRIM | ID: wpr-691715

ABSTRACT

Objective To explore the establishment of disabled grade assessment scale for long-term care insurance (LTC).Methods Based on the results of literature review and long-term care needs survey,an initial scale of disabled grade assessment was formulated,then the Delphi method was combined to conduct the consultation on 22 specialists.Results After two rounds of expert consultation,the unanimous disabled grade assessment scale included four first-class indexes of sensation perception,daily activity ability,recognition ability and emotion behavior,the importance mean (M) was 4.64-5.00 points,which ≥4.0 points,the variable coefficient (CV) was 0.00 %-13.86 %,which ≤25 %,the full mark rate (Fr) was 72.73 %-100.00 %,which ≥50 %,recognition rate (Ar) was 90.91%-100.00%,which ≥80%,which indicated that the experts reached a consensus opinion.Among the 22 second-class indexes,the M was 4.27-4.95 points,which ≥4.0 points,CV was 4.20%-25.62%,Fr was 63.64%-95.46%,Ar was 77.27 %-100.00 %.The two items of touch sense and getting up from sitting position were newly added,the transferring of table and chair,recent memory and procedural memory were modified into sitting down on the bench and chair,immediate memory and short term memory,the experts reached the consistent opinion.Conclusion The replenished and modified disabled grade assessment scale for LTC has higher authority and expert consistency,which can provide a theoretical reference for the disabled grade assessment work of LTC.

14.
Chinese Journal of Geriatrics ; (12): 1171-1175, 2017.
Article in Chinese | WPRIM | ID: wpr-668941

ABSTRACT

Objective To investigate changes in the number and function of endothelial progenitor cells (EPCs) in elderly patients with permanent atrial fibrillation(AF).Methods This prospective study included 35 elderly patients in each the permanent atrial fibrillation group and the control group.The numbers of circulating CD34+/KDR+ cells in the two groups were determined by flow cytometry.After two sets of peripheral blood samples were taken,mononuclear cells were isolated through density gradient centrifugation and cultured in vitro.EPC colonies were identified by the methylthiazolyldipheny-tetrazolium(MTT) assay and adhesion assay.The proliferation,adhesion and vasculogenesis of EPC colonies were determined by Matrigel culture.Enzyme-linked immunosorbent assay and nitric acid reductase assay were used to measure the secretion of vascular endothelial growth factor (VEGF) and nitric oxide (NO) in EPCs.Results The numbers of CD34+/KDR+ cells were lower in the AF group than in the control group (20.0±12.7)/104 vs.(77.9±58.9)/104 (P<0.05).The number of EPC colonies in the atrial fibrillation group was significantly lower than that in the control group (1.8 ± 0.6) CFU vs.(3.5 ± 0.8) CFU (P < 0.01).The proliferation,adhesion and vasculogenesis of EPC colonies in the AF group decreased,compared with the control group (each P<0.01 or 0.05).Paracrine secretion of VEGF in the AF group (27.4±9.9)ng/L was lower than that in the control group (41.9±7.3)ng/L (P<0.01) and paracrine production of NO in the AF group also decreased (P<0.05).Conclusions EPCs In elderly patients with permanent atrial fibrillation show decreased numbers and reduced proliferation,adhesion and vasculogenesis.Paracrine VEGF and NO secretion is down as well.

15.
Tianjin Medical Journal ; (12): 1268-1271, 2016.
Article in Chinese | WPRIM | ID: wpr-504172

ABSTRACT

Objective To investigate the influence and clinical significance of single and dual-chamber pacing on central aortic pressure (CAP) and augmentation index (AI) in non-smoking individuals. Methods Totally, 83 non-smokers with pacemaker-implanted were consecutively enrolled in this study, and they were divided into three groups:dual-chamber pacemaker group (DDD, n=35), single-chamber pacemaker group (VVI, n=33) and control group (n=15). Heart rate (HR), CAP, AI, systolic blood pressure (SBP) and diastolic blood pressure (DBP) were measured in three groups of patients. Finally, DDD pacing mode was turned into VVI pacing mode in patients of DDD group and the indexes were measured again. All of the indexes were recorded and analyzed. Results There were no significant changes in baseline characteristics and laboratory data between three groups (P>0.05). Left atrial diameters were significantly higher in VVI group than those of control group (P0.05). All of these indexes (CAP, AI and brachial BP) were significantly reduced after the pacing mode was changed (P<0.05). Conclusion In non-smokers, dual-chamber pacing mode can increase CAP and AI.

16.
Article in Chinese | WPRIM | ID: wpr-461000

ABSTRACT

Objective To investigate factors associated with prevalence, awareness, treatment and control of hypertension in Dagang Oil Field, and to provide the scientific evidence for the intervention measurements. Methods A cross-sectional, population-based survey was conducted in Dagang Oil Field from 2008 to 2010. Totally, 16 553 adults, 8 174 men (49.38%) and 8 379 women (50.62%), completed all of the questionnaires, measurement examination and blood specimen collection. Results The prevalence of hypertension was 27.30%. Multivariate logistic regression analysis showed that male, old age, overweight or obesity, family history of hypertension, marriage, education attainment, snoring, high heart rate, fasting blood glucose, serum total protein, and hyperuricemia were associated with hypertension. The awareness, treatment, control rates among all hypertensive subjects, and control rate among treated hypertensive participants were 52.65%, 40.07%, 15.51%, and 38.78%, respectively. Awareness was more common in those who were 45-64 years old , high medical costs, family history of hypertension, and smoking currently. Odds ratio (OR) (95% CI) of awareness was 5.24 (2.78 to 9.88), 24.11 (11.91 to 48.84) and 27.46(13.92 to 54.18) for medical costs 1-59.9 yuan/month, 60-199.9 yuan/month, and≥200 yuan/month, respectively. In contrast, exercising 2-4 times/week and longer sleep duration were associated with lower awareness. Medication treatment was more common in those who had old age, high medical costs, hypertension family history, coronary heart disease, prefer vegetable, while less common in those who exercise occasionally, sleep longer and drink alcohol currently. OR (95%CI) of treatment was 10.89 (3.76 to 31.56), 54.07 (19.20-152.24), and 87.31 (31.54 to 241.75) for medical costs 1-59.9 yuan/month, 60-199.9 yuan/month, and ≥200 yuan/month, respectively. Controlled hypertension was more common in those who had old age, high medical costs, exercise 2-4 times/week, coronary heart disease, prefer crude fibre diet, but less common in those who drink alcohol currently, have higher heart rate, and higher education attainment. OR (95%CI) of controlled hypertension was 13.59 (6.50-28.44), 14.67 (7.01-30.68), and 17.43 (8.34-36.39) for medical costs 1-59.9 yuan/m, 60-199.9 yuan/m, and≥200 yuan/m, respectively. Conclusion Despite high rate of awareness, treatment and control of hypertension still need to be strengthened.

17.
Tianjin Medical Journal ; (12): 158-161, 2015.
Article in Chinese | WPRIM | ID: wpr-461204

ABSTRACT

Objective To investigate the effect and mechanism of Imatinib mesilate (Imatinib) on intimal hyperplasia of rabbit carotid arteries after balloon injury. Methods Thirty adult Newzealand rabbits were randomly divided into three groups:group A, B and C. Their right carotid arteries were injuried then administered with 0, 25 or 50 mg/kg of Imatinib dai?ly for 14 consecutive days when the rabbits were sacrificed. The carotid arteries were harvested and sectioned for HE-stain?ing and immunohistochemisty staining. Real-Time PCR was used to examine transcription levels of PDGF-B and PDGFR-βmRNA. The plasma level of PDGF-BB was assayed by ELISA. Results Arterial intimal hyperplasia and stenosis following balloon injury were seen in three groups. Thickness and area of neointima, ratio of thickness of intima to media, ratio of area of intima to media and mRNA level of PDGF-β are all higher in group A than those in group B than those in group C (P<0.01). By contrast, the mRNA transcription level of PDGFR-β increased significantly in group C than that in group A (1.236±0.356 vs 0.708±0.372;t=2.91;P<0.01). Plasma level of PDGF-BB increased in all three groups after balloon injury than that in the baseline (P<0.01). The transcription level of PDGF-BB is higher in group A than that in group B and in group C (ng/L:23.464±3.542, 19.504±2.454, 16.588±1.207, F=17.322, P<0.05). There was no difference between group B and C. There was positive correlation between mRNA transcription level of PDGF-B and plasma level of PDGF-BB ( r=0.806, P<0.01). Conclusion Vascular injury can cause intimal hyperplasia and increased PDGF-B mRNA transcription. Imatinib mesilate could inhibit the intimal hyperplasia through down regulating PDGF-B mRNA transcription.

18.
Chinese Circulation Journal ; (12): 54-58, 2015.
Article in Chinese | WPRIM | ID: wpr-462670

ABSTRACT

Objective: To observe the effect of cilostazol on the ion channel of right ventricular cells in experimental rats, and to explore the ion channel mechanism of ciolstazol for preventing the ventricular arrhythmia in Brugada syndrome. Methods: Our research was composed of 2 groups: ①Perfusion group, the cells were treated in 4 sub-groups by cilostazole at 1, 2, 5, 50μmol/L respectively, and there were 9, 5, 3, 7 cells were recorded at each sub-group to observe the differences of current density Ito at before and after treatment. ②Oral group, which included 4 sub-groups:Control 1 with 7 rats, Experiment 1 with 5 rats, and Control 2 with 8 rats, Experiment 2 with 6 rats respectively. The differences of current density Ito and ICa,L were studied between each Control and Experiment sub-groups. Results: In Perfusion group,①with cilostazole 1, 2, 5, 50μmol/L treatment, the current density Ito decreased in all sub-groups, when the self-command voltage at+60mV, the Ito was signiifcantly different in each sub-group at before and after treatment, all P0.05. In Oral group,①When the self-command voltage from-50mV reached the maximum of+60mV, the Ito was similar between Control 1 and Experiment 1 sub-groups, P>0.05.②When the self-command voltage at+10mV, the current density of ICa,L was slightly higher in Control 2 sub-group than that in Experiment 2 sub-group, P>0.05. Conclusion: Direct perfusion of cilostazole in right ventricular cells may inhibit Ito in experimental rats, such effect was similar with cilostazole treatment at (1-50)μmol/L. Cilostazole might prevent the ventricular arrhythmia in Brugada syndrome in experimental rats.

19.
Tianjin Medical Journal ; (12): 296-299, 2015.
Article in Chinese | WPRIM | ID: wpr-474032

ABSTRACT

Objective To determine the association between serum potassium level and the severity of coronary artery atherosclerosis. Methods A total of 246 patients underwent coronary artery angiography were included into this study, and were divided into four groups according to the involved main coronary artery:control group (0 diseased vessel, n=81), one dis?eased vessel group (n=43), double diseased vessel group (n=46) and three diseased vessel group (n=76). Patients were also di?vided into low potassium group (K+double diseased vessel group>one diseased vessel group>control group (P<0.05). (2) There was a significantly higher Gensini score in low potassium group [36(8, 94)] than that of high potassium group [16(0,56)]. (3) There was significant negative correlation between serum potassium level and Gensini score (r=-0.206, P=0.001). (4) It was found that age, male, the low level of serum potassium, diabetes mellitus and hyperten?sion were independent risk factors of CHD. Conclusion The serum potassium level is negatively correlated with the severi?ty of CHD. The low level of serum potassium is an independent risk factor of CHD.

20.
Tianjin Medical Journal ; (12): 1296-1299, 2015.
Article in Chinese | WPRIM | ID: wpr-481422

ABSTRACT

Objective To observe the impact of alone or combined use of ezetimibe and simvastatin on transient outward potassium current (Ito) in ventricular myocytes of rat model of ischemia and reperfusion (IR). Methods Seventy-five male SD rats were randomly divided into five groups, control group (CON), control-IR group (CIR), ezetimibe treatment group (EIR), simvastatin treatment group (SIR) and combined ezetimibe and simvastatin treatment group (ESIR). After two weeks of treat?ment with intragastic normal saline or drugs (ezetimibe or simvastatin), myocytes were isolated from right ventricular with colla?genaseⅡ, and Ito was recorded by whole-cell patch clamp technique. Results (1) The Ito current density at+60 mV was sig?nificantly decreased in CIR group than that of CON group (P0.05). The Ito current densities were higher in SIR group and ESIR group compared to those of CIR group. There was no significant difference in Ito current density between SIR group and ESIR group (P>0.05). (2) There was a significant increase in the half-inactivation (V1/2) in CIR group than that of CON group, but no significant differ?ence between EIR group and CIR group (P >0.05). There was a significant difference in the half-inactivation (V1/2) in SIR group and ESIR group compared to that of CIR group (P0.05). There was no significant difference in the slope factor (K) between five groups (P>0.05). (3) The time-con?stant (τ) of Ito recovery curves from inactivation was significantly higher in CIR group than that of CON group (P0.05). There was a significant difference in the time-con?stant (τ) of Ito recovery curves from inactivation in SIR group and ESIR group compared to that of CIR group (P0.05). Conclusion Simvastatin pre-treatment or ezetimibe+simvastatin pre-treatment can reverse the effect of IR on Ito of ventricular myocytes, but ezetimibe shows no such effects.

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