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Objective To evaluate the value of 320-slice computed tomography (CT) " doublelow" maximum density projection (MIP) imaging protocol (low tube voltage and low contrast agent concentration) in obstructive sleep apnea syndrome (OSAS) with coronary heart disease.Methods 40 cases of OSAS with coronary heart disease in our hospital were selected.All patients underwent 320-slice CT "double-low" MIP imaging and received conventional coronary angiography (CAG) within 1 month.With reference to CAG examination results,the accuracy of 320-slice CT "double low" MlIP-imaging technique in diagnosing the Obstructive sleep apnea syndrome with coronary heart disease can be evaluated.Results The sensitivity,specificity,accuracy,positive predictive value and negative predictive value of 320-slice CT"double-low " MIP imaging in the diagnosis of obstructive respiratory sleep disorder with coronary disease were 95.14％,94.43％,95.33％,83.62％,98.20％.respectively.The heart rate of testers was (65.20±4.79) bpm/min,the dose length product (DLP) was (98.22 ±32.54)mGy · cm,and the effective radiation dose (ED) was (1.35 ± 0.42) mSv.Conclusions Compared with CAG,the 320-slice CT "doublelow" MIP imaging technique reduced doses of radiation while maintained the good quality of image.Therefore,this technique has high application value as a clinical diagnosis method to diagnose patients with obstructive respiratory sleep disorder and coronary heart disease.
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Objective@#To evaluate the value of 320-slice computed tomography (CT) " double-low" maximum density projection (MIP) imaging protocol (low tube voltage and low contrast agent concentration) in obstructive sleep apnea syndrome (OSAS) with coronary heart disease.@*Methods@#40 cases of OSAS with coronary heart disease in our hospital were selected. All patients underwent 320-slice CT " double-low" MIP imaging and received conventional coronary angiography (CAG) within 1 month. With reference to CAG examination results, the accuracy of 320-slice CT " double low" MIP-imaging technique in diagnosing the Obstructive sleep apnea syndrome with coronary heart disease can be evaluated.@*Results@#The sensitivity, specificity, accuracy, positive predictive value and negative predictive value of 320-slice CT" double-low " MIP imaging in the diagnosis of obstructive respiratory sleep disorder with coronary disease were 95.14%, 94.43%, 95.33%, 83.62%, 98.20%. respectively. The heart rate of testers was (65.20±4.79)bpm/min, the dose length product (DLP) was (98.22±32.54)mGy·cm, and the effective radiation dose (ED) was (1.35±0.42)mSv.@*Conclusions@#Compared with CAG, the 320-slice CT " double-low" MIP imaging technique reduced doses of radiation while maintained the good quality of image. Therefore, this technique has high application value as a clinical diagnosis method to diagnose patients with obstructive respiratory sleep disorder and coronary heart disease.
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Objective To investigate the correlation between hepatic fat fraction(HFF)and some clinical indicators by measuring HFF and summarize its clinical significance.Methods A total of 95 patients were included in this study.MR data were acquired with Dixon technique,and the HFF of liver were measured.According to the HFF,all patients were divided into high-fat group and low-fat group.Subcutaneous fat area(SA),visceral fat area(VA)and total fat area(TA)were also measured.The age of patients,blood pressure, fasting blood glucose(FPG),total cholesterol (TC),triglyceride (TG),low density cholesterol (LDL-c)and high density cholesterol (HDL-c) were recorded and the body mass index(BMI)was calculated.Results The levels of FPG,TG,LDL-c,systolic blood pressure,diastolic blood pressure,BMI,VA,TA and visceral fat percentage (VFP)in high-fat group were significantly higher than those in low-fat group (P<0.05), while the abdominal subcutaneous fat percentage (SFP)was significantly lower than that in low-fat group (P<0.05).HFF was positively correlated with FPG,TG,LDL-c,VA,TA,VFP,age and BMI (r=0.354,0.370,0.415,0.299,0.285,0.238,0.203,0.221,respectively;P<0.05).Conclusion Semi-quantitative analysis of hepatic fat using MR Dixon technique can reflect the degree of hepatic fatty infiltration, and can be used as a quantitative indicator for early diagnosis and treatment evaluation of nonalcoholic fatty liver disease.
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Objective To investigate whether diffusion kurtosis imaging(DKI)can be predictive in high-aggressive prostate cancer (PCa).Methods 51 patients with pathologically confirmed PCa underwent preoperative DK-MR imaging(b of 0,700,1 400 and 2 100 s/mm2).Data was post-processed by mono-exponential and non-Gauss DK model,respectively,for quantitation of apparent diffusion coefficient(ADC),apparent non-Gaussian diffusion coefficient(Dapp)and apparent non-Gauss kurtosis coefficient(Kapp). The ability of Dapp,Kapp and ADC for predicting high-aggressive(Gleason score>4+3)PCa was analyzed by ROC regression.Results There were 29 low-aggressive and 33 high-aggressive PCa on pathologic findings.High-aggressive PCa had significantly lower ADC[(0.764 ± 0.114)×10-3mm2/s vs(0.825 ± 0.116)×10-3mm2/s,P=0.004],lower Dapp[(1.212 ± 0.194)×10-3mm2/s vs (1.472 ± 0.297)×10-3mm2/s,P< 0.001],while higher Kapp(1.114 ± 0.177 vs 0.835 ± 0.192,P<0.001)than that for low-aggressive PCa.Dapp and Kapp had significantly higher sensitivity(Dapp:75.3%;Kapp:74.1%),specificity(Dapp:85.4%;Kapp:86.7%)and area under curve(AUC)(Dapp:0.889;Kapp:0.894)than that for ADC(64.1%;76.4%;0.738;P<0.01)in differentiating low-aggressive from high-aggressive PCa.Conclusion DKI can be a reliable way for predicting high-aggressive PCa.
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Thirty nine patients with pathologically confirmed parotid tumors,including 18 cases of pleomorphic adenomas,12 cases of papillary cystadenoma lymphomatosum and 9 cases of malignant tumors,were enrolled in the study.Characteristics on routine MR image,diffusion weighted imaging (DWI),timesignal intensity curve (TIC) and apparent diffusion coefficient (ADC) value in different types of tumors were evaluated.There were significant differences in imaging features between benign and malignant tumors (P ＜ 0.01).The TIC types were A,B and C for pleomorphic adenomas,papillary cystadenoma lymphomatosum and malignant tumors,respectively.The mean ADC value of pleomorphic adenomas was significantly higher than that of papillary cystadenoma lymphomatosum and malignant tumors (P ＜ 0.01).No significant difference in ADC values between papillary cystadenoma lymphomatosum and malignant tumors was detected (P =0.73).The study indicates that MR plain scan combined with dynamic contrast enhanced MRI and DWI may be helpful in pre-operative differentiation of common parotid tumors.
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Objective To investigate the application value of combined detection of antikeratin (AKA) antibody,anti-cyclic citrullinated peptide(anti-CCP) antibody,anti-RA33 antibody,RF and ESR in the diagnosis of rheumatoid arthritis(RA).Methods One hundred cases of RA and 60 cases of suspected RA in our hospital from June 2014 to May 2015 were collected.One hundred and twenty cases of non-RA other autoimmune diseases served as the control group.The indirect immunofluorescence assay (IFA) was used to detect anti-KA antibody,anti-CCP antibody and anti-RA33 antibody were detected by using ELISA.The rate scatter turbid assay was used to detect RF.The Westergren method was used to detect ESR.The diagnostic performance of each diagnostic indicator was evaluated.Results The detection rates of anti-KA antibody,anti-CCP antibody,anti-RA33 antibody,RF and ESR in the RA group were in turn 64%,75%,44%,84% and 51% respectively,the detection rate(sensitivity) of 5-indicator parallel detection were 97%, the specificity of 5-indicator series detection was 89.2%;in the suspected RA group,the detection rates of 5-indicator were in turn 16.7%, 31.7%,13.3%,20%,15% respectively,which in the control group were in turn 0.8%,2.5%,1.7%,0.8% and 5.8% respectively.The detection rates of 5-indicator in the RA group was significantly higher than that in the suspected RA group,showing extremely significant difference (P<0.001),the detection rate of 5-indicator had extremely significant difference between the suspected RA group and control group (P<0.001),the sensitivity of five-indicator parallel detection was 97%,which was significantly higher than that of single indicator detection (P<0.05),the detection specificity of 5-indicator series detection was up to 100%,which was also significantly higher than that of single indicator detection (P<0.05),the missed diagnosis rate of parallel detection was minimal,while the negative predictive value was highest,the misdiagnosis rate of series detection was lowest,the positive predictive value was highest,the Youden index of parallel detection was largest.Conclusion The single detection of anti-CCP antibody and RF have good sensitivity and specificity, but 5-indicator combined detection has higher sensitivity and specificity,which can better reduce the missed diagnosis rate and misdiagnosis rate,can greatly improve the efficiency of diagnosis,and has an important clinical significance for the early diagnosis of RA.
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Objective To explore the clinical characteristics and the influence factors of prognosis of ad -vanced ovarian cancer patients after abdominal metastases .Methods We retrospectively analyzed 65 cases dur-ing January 2013 to January 2016 in the First People′s Hospital of Tianmen .The patients were diagnosed clearly with pathological ,diagnosed for the first time and has the complete clinical data including peritoneal metastases in 58 cases,which were analyzed for single factor and multiple factors of influencing factors survival analysis .Results 58 cases of patients with diagnosis of peritoneal metastasis in ovarian cancer that the average is (49.2 ±6.5), from ovarian cancer diagnosis to abdominal metastases for an average time of 11 months,ovarian cancer patients with peritoneal metastasis of the median survival time was 8 weeks,but 7 cases without abdominal metastases that the median survival time was 15 weeks.The single factor survival curves(Kaplan-meier)showed that marital sta-tus,reproductive history,history of breastfeeding,malignant ascites,neoadjuvant chemotherapy,comprehensive treatment(chemotherapy and tumor cells to destroy the loss and laparotomy abdominal hot perfusion chemothera -py) ,peritoneal metastasis tumor number ,residual lesion size ,quality of life in patients with residual lesions ( KPS scores),D-dimer level in plasma and urine trace albumin levels related to the prognosis of patients (P<0.05). Conclusion Patients with advanced ovarian cancer patients with peritoneal metastasis survival time is shorter , and also company with poor prognosis;Neoadjuvant chemotherapy combined tumor cells to destroy the loss and postoperative intraperitoneal hot perfusion chemotherapy ,short-term curative effect is good ,it can not only im-prove the advanced ovarian cancer treatment effectiveness ,but also improve the quality of life in patients of late phase.The D -dimer level in plasma and urine trace albumin levels before treatment have remained in the pa-tients with high level or not reduce ,treatment effect and prognosis was poor .These can be used as a new index of judging prognosis .
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Objective To investigate the effects of PTD4-GFP-Apoptin protein on proliferation inhibition and apoptosis-inducing of different types of leukemia cells. Methods Genetic engineering was used to restructure a carrier containing PTD4-GFP-Apoptin gene, and MTT was applied to detect the expressed PTD4-GFP-Apoptin fusion protein and its effect on the leukemia cell proliferation. Flow cytometry (FCM) was used to detect the effects on cell apoptosis. Results MTT cell proliferation inhibitory experiment showed that PTD4-GFP-Apoptin had different degree of proliferation inhibition on different types of leukemia cells;furthermore, the inhibitory effect presented positive correlation with time and concentration. FCM showed that PTD4-GFP-Apoptin had apoptosis-inducing effect on HL-60 cells, and the apoptotic rate had significant difference compared with the control group (P <0.05). Conclusions PTD4 can carry large proteins to penetrate the cell membrane, and PTD4-GFP-Apoptin may produce the inhibiting proliferation in vitro for a variety of leukemia cells. Apoptin can induce tumor cell apoptosis without affecting normal cells, which might become a new agent for the clinical treatment of leukemia.
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<p><b>OBJECTIVE</b>To explore the clinicopathological significance and relationship of Tspan 1 and Integrin α6 expression in pancreatic ductal adenocarcinoma (PDAC) tissue and pancreatic cancer cell lines.</p><p><b>METHODS</b>Immunohistochemistry was used to detect the expression of Tspan 1 and Integrin α6 in 95 paraffin-embedded PDAC specimens and 55 adjacent non-cancerous pancreatic tissues which were collected from May 2004 to January 2013.Western blot and quantitative real-time polymerase chain reaction (qRT-PCR) were used to detected the protein and mRNA expression in 16 paired fresh PDAC specimens of the pancreas and adjacent non-cancerous pancreatic tissues and 6 different pancreatic cancer cell lines.χ(2) test, Spearman-rank correlation analysis, Kaplan-Meier method and multivariate Cox regression analysis were used to analyze the data.</p><p><b>RESULTS</b>Tspan 1 and Integrin α6 were significantly over-expressed in PDAC than in adjacent non-cancerous pancreatic tissues (χ(2) = 7.429, P < 0.05; χ(2) = 15.1, P < 0.01). Lymph node metastasis, TNM stage and post-operation recurrence were positively correlated with the expression of Tspan 1 (χ(2) = 6.688, P < 0.01; χ(2) = 13.055, P < 0.01; χ(2) = 6.116, P < 0.05) . TNM stage was positively correlated with the expression of Integrin α6 (χ(2) = 8.896, P < 0.05) . Tspan 1 was correlated with Integrin α6 (r = 0.223, P < 0.05) . The expressions of Tspan 1 and Integrin α6 were negatively correlated with survival time (χ(2) = 5.263, P < 0.05;χ(2) = 10.124, P < 0.01) . Multivariate analysis revealed that Tspan 1 and Integrin α6 expressions were independent prognostic factors in PDAC patients (χ(2) = 6.152, P < 0.05; χ(2) = 9.479, P < 0.01). Western blot (t = 2.278, P < 0.05; t = 3.153, P < 0.05) and qRT-PCR (t = 2.439, P < 0.05; t = 3.258, P < 0.05) showed that Tspan 1 and Integrin α6 expressions were higher in PDAC tissues than in adjacent non-cancerous pancreatic. Tspan 1 and Integrin α6 were expressed in all six pancreatic cancer cell lines.In SW1990 which derived from metastasis PDAC, Tspan 1 and Integrin α6 expressions were higher than the cell lines from primary tumor.</p><p><b>CONCLUSION</b>Tspan 1 and Integrin α6 expression can up-regulate the invasion and metastasis of PDAC and may be used to predict the prognosis of PDAC.</p>