RESUMEN
Objective:To investigate the effect of adjusting density exposure steps on image quality and radiation dose in digital mammography.Methods:Using the automatic exposure control (AEC) mode of the digital mammography machine, five different gland thicknesses of 4.3, 5.3, 6.3, 7.3, and 8.3 cm were simulated by attaching 0, 1, 2, 3, and 4 PMMA plexiglass plates under the RMI-156 modal body, and the density exposure steps were adjusted to -3, -2, -1, 0, 1, 2, 3, and 4 for each thickness. The target/filter combination, tube voltage, tube current, incident body surface dose (ESD), incident surface air kerma (ESAK), half-value layer (HVL) and the average glandular dose displayed by the device (displayed AGD) were recorded at each step and thickness, and the signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR), figure of merit (FOM) and the calculated average glandular dose (calculated AGD) were calculated. Then, the display effects of simulated fibers, simulated calcifications and simulated masses within the modal body were scored subjectively, and the changes in image quality and radiation dose at different steps were analyzed, and the relationships between ESD and ESAK, displayed AGD and calculated AGD, and displayed AGD/ESD and calculated AGD/ESAK were analyzed. A linear fit was used for the steps with SNR, CNR, and FOM, and an exponential function curve fit was used for the steps with mAs, ESAK, and calculated AGD. The differences between ESD and ESAK, displayed AGD and calculated AGD, and displayed AGD/ESD and calculated AGD/ESAK were analyzed by paired-samples t test. Results:The CNR and SNR of mammographic images rose and fell by about 8% with each increase or decrease of one step. The scores of image simulated fibers, simulated calcifications, and simulated masses showed an overall upward trend with increasing steps, but there were still cases where the scores decreased with increasing grades. FOM varied from 97% to 104% at each grade with little variability. ESD, ESAK, displayed AGD, and calculated AGD, which could measure radiation dose, showed an exponential trend of increasing function with increasing steps, with a variation of about 63% to 165%. There were statistically significant differences ( t=-9.61, P=0.001) between ESD (15.14±10.08) and ESAK (16.66±11.07). However, there were no statistically significant differences ( t=1.20, P=0.240) between displayed AGD and calculated AGD, which were 3.66±2.18 and 3.61±1.99, respectively. Conclusions:The adjustment of density exposure steps can make the image quality change linearly and the radiation dose change exponentially with increasing speed, and the mode and magnitude of the adjustment are appropriately stable with high application value.
RESUMEN
Objective:To study the effects of radiotherapy and the prognostic factors in hepatocellular cancer (HCC) patients with cardiophrenic angle or superior diaphragmatic lymph nodes metastasis (LNM).Methods:We retrospectively analyzed 56 HCC patients with cardiophrenic angle or superior diaphragmatic LNM who were treated with or without external beam radiation therapy (EBRT) in Zhongshan Hospital of Fudan University from Jan 2010 to Aug 2020. Patients were divided into two groups according to whether they received radiotherapy, EBRT group and non-EBRT group, and each group had 28 patients. Radiation fields included or excluded primary tumor in EBRT group, and the cardiophrenic angle or superior diaphragmatic LNM did not receive any local treatment in non-EBRT group. The response rate, survival rate, local control rate, prognostic risk factors of the two groups were studied.Results:After EBRT, the partial response rate and complete response rate were 32.1%(9/28) and 32.1%(9/28). The median survival rate of EBRT group was 16.1 months (95% CI 9.00-23.21, RR=3.63) vs. 6.9 months (95% CI 4.63-8.77, RR=1.06) for the non-EBRT group, with statistically significant difference ( χ2=15.53, P<0.05). Cardiophrenic angle or superior diaphragmatic lymph nodes 1-year local control rate for EBRT group and non-EBRT group were 37.0% vs. 10.7%, with statistically significant difference ( χ2=5.28, P<0.05). Since diagnosis of cardiophrenic angle or superior diaphragmatic LNM, 4 patients (14.3%) in the EBRT group vs. 13 patients (46.4%) in the non-EBRT group had higher alpha-fetoprotein (AFP) level after 3 months compared with the AFP before EBRT ( χ2=6.84, P<0.05). Multivariate analysis showed that multiple intrahepatic tumors, maximal diameter of intrahepatic tumors >5 cm, AFP≥400 μg/L, no EBRT were poor prognostic factors. Conclusions:EBRT can prolong overall survival and improve the control rate of lymph node of HCC patients with cardiophrenic angle or superior diaphragmatic LNM. Patients with multiple intrahepatic tumors, maximal diameter of intrahepatic tumors >5 cm, AFP≥400 μg/L and no EBRT have poor prognosis.
RESUMEN
BACKGROUND: It is seldom reported that the effect of chemical acellular nerve allograft combined with bone marrow mesenchymal stem cell transplantation on sciatic nerve injury is evaluated by tensile mechanical properties. OBJECTIVE: To determine the effect of chemical acellular nerve allograft combined with bone marrow mesenchymal stem cell transplantation in the treatment of sciatic nerve injury. METHODS: Forty-five Sprague-Dawley rats were randomly divided into autologous nerve transplantation group, chemical acellular nerve allograft group, and chemical acellular nerve allograft and bone marrow mesenchymal stem cell transplantation group (n=15 per group). Models of 10-mm sciatic nerve injury were prepared. The injured sciatic nerves were repaired using autologous nerve, chemical acellular nerve allograft and chemical acellular nerve allograft and bone marrow mesenchymal stem cells. At 20 weeks after surgery, electrophysiological measurement and stretching experiments were carried out. RESULTS AND CONCLUSION: (1) The wave amplitude and motion conduction velocity were larger in the chemical acellular nerve allograft and bone marrow mesenchymal stem cell transplantation group and autologous nerve transplantation group than in the chemical acellular nerve allograft group (P < 0.05). (2) The tensile elastic limit strain, elastic limit stress, maximum strain and maximum stress were larger in the chemical acellular nerve allograft and bone marrow mesenchymal stem cell transplantation group and autologous nerve transplantation group than in the chemical acellular nerve allograft group (P < 0.05). (3) These results suggest that chemical acellular nerve allograft and bone marrow mesenchymal stem cell transplantation has obvious effect on repairing sciatic nerve injury.
RESUMEN
Objective To investigate the inhibitory effect and mechanism of Metformin (Met) combined with irradiation in CT26WT cell lines or mouse models with transplanted tumors.Methods CT26WT cell line was treated with 0.5 μmol/L,1.0 μmol/L,5.0 μmol/L and 10.0 μmol/L Met,and CellTiter Glo kit was used to detect the inhibitory effect of Met at different concentrations on the viability of CT26WT cells.CT26WT cell line was treated with the control,Met (10 pmol/L),15 Gy irradiation and 15 Gy irradiation+Met (10 μmol/L).Clone formation assay was employed to detect the cell proliferation activity.Bablc mouse models of transplanted tumors (tumor size＞ 150 mm3) were established and randomly divided into the control,15 Gy irradiation,Met and 15Gy irradiation+Met groups.Mice were given with 750 mg/kg Met at 24 h before irradiation.Transplanted tumor volume was measured regularly to delineate the growth curve of transplanted tumors and survival curve.The expression levels of P-H2AX and Sting proteins in CT26WT cells and transplanted tumors were detected by Western blot.The infiltration of CD8a (+) T cells in transplanted tumor tissues was detected by immunohistochemistry.Results The relative cell survival rate was 100％,87.9％,87.8％,87.3％ and 76.5％ in the 0,0.5,1.0,5.0 and 10.0μmol/L Met groups,respectively (all P＜0.05).The inhibitory effect of 10.0 μmol/L was significantly stronger than that of 5.0 μmol/L (P＜0.001).The colone formation rate 34.0％,24.0％,22.3％ and 14.0％ in the control,Met,15 Gy irradiation,Met+ 15Gy irradiation groups,respectively (all P＜0.001).Western blot showed that compared with the control group,the expression of Sting protein was increased by 2.99-fold after Met treatment (P＜0.001),and increased by 1.37-fold and 4.41-fold in the 15 Gy irradiation and 15Gy irradiation+Met groups (both P＜0.01).Compared with the 15 Gy irradiation group,the expression of P-H2AX protein was significantly increased by 1.43 times after treatment with 15Gy+Met (P＜0.001).The transplanted tumor growth curve showed that the transplanted tumor growth in the 15 Gy+Met group was slower than that in the control group[(1007.0± 388.5) mm3 vs.(2639.0± 242.9) mm3,P＜ 0.05)].The overall survival time in the 15 Gy irradiation+Met group was 48 d,significantly longer than 32 d in the control group (P＜0.001).Compared with the control group,the expression of P-H2AX and Sting proteins in the 15 Gy+ Met group was increased by 8.8-fold and 1.6-fold (both P＜0.001).Immunohistochemical staining showed that the infiltration of CD8a (+) T cells in the 15 Gy irradiation+Met group was significantly higher than that in the control group (P＜0.01).Conclusions Met combined with radiotherapy can inhibit the proliferation and clone formation of colon cancer cells,probably by aggravating DNA damage and activating the Sting signaling pathway,eventually leading to the increase of CD8a (+) T cells in tumor tissues and enhancing the killing effect upon transplanted tumor cells.
RESUMEN
Objective To investigate the effects and mechanisms of Omega-3 polyunsaturated fatty acid (ω-3 PUFA) supplementation on spatial learning and memory capacity,neuronal apoptosis,microglia activation,neuroinflammatory response and nuclear factor-κB (NF-κB) pathway in cognitive impairment model rats.Methods Cognitive impairment model rats were induced by intraperitoneal injection of D-galactose.Thirty-six Wistar rats were randomly divided into three groups:control group (Con),Cognitive impairment group (AD) and ω-3 PUFA supplementation group (AD+ω-3).The spatial learning and memory capacity of experimental rats were examined by the Morris water maze (MWM).Apoptotic neurons were determined by Nissl staining.The microglia activation relatived protein (Iba-1) expressions was determined by immunohistochemistry staining and western blot,respectively.While,the serum levels of tumor necrosis factor-α (TNF-α),interleukin (IL)-1 and IL-6 were tested by enzyme linked immunosorbent assay (ELISA).In addition,the protein expression of NF-κB related indexes including NF-κB p65,p-IκB and TLR4 were tested using western blot.Results Compared with the Con group,the escape latency increased and the distance percentage in target quadrant decreased;neurons apoptosis,microglia activation and neuroinflammatory factors significantly increased in the other two groups (P=0.00).Compared with the AD group,the escape latency was remarkably shorter (2 d:41.35±2.34vs.58.07±3.27,P=0.03;3 d:35.07±2.45 vs.44.39±3.21,P=0.02;4d:28.12±2.43vs.35.63±2.20,P=0.01;5 d:23.74±1.06 vs.29.76±1.15,P=0.03),and the distance percentage in target quadrant increased significantly [(48.26±4.02)％ vs.(34.14±3.49)％,P =0.01] after ω-3 PUFA supplementation.The incidence of neurons apoptosis significantly decreased in AD + ω-3 group [(29.93 ±3.05) ％ vs.(47.58±4.14)％,P=0.01].ω-3 PUFA supplementation inhibited the protein expression of microglia,and meanwhile inhibed the expression of microglia-induced neuroinflammatory factors [TNF-α:(85.27±9.77vs.156.13±14.53) pg/ml,P=0.00;IL-1:(41.23±5.38vs.75.04±9.27) pg/ml,P=0.01;IL-6:(47.58±4.23 vs.97.47±9.09) pg/ml,P=0.00].Compared with AD group,the protein expression of NF-κB pathway significantly decreased in AD+ω-3 group.Conclusion ω-3 PUFA supplementation can inhibited microglia activation,decrease microglia-mediated neuroinflammatory response,reduce neuron apoptosis and markedly improve spatial learning and memory capacity in cognitive impairment rats,possibly mediated by inhibiting NF-κB pathway.
RESUMEN
Ophthalmology rotation is an integral part of standardized training for general practitioners. The duration of ophthalmology training is only half a month in whole 33-month general practice residency training. The main objective of training for general practice residents is to master the basic clinical skills of ophthalmology, to be able to accurately and timely identify eye diseases, especially those requiring urgent treatment, and to prevent the loss of visual function. This article introduces our teaching experience in ophthalmology training for general practice residents accumulated since 2014. We suggest that the trainees should pre-examine patients independently, play a role of standard patients and receive consultation from teachers. We developed a simple patient assessment form for primary care doctors, the patient who got 10 or more points of the form, should be referred to ophthalmological specialists.
RESUMEN
Ophthalmology rotation is an integral part of standardized training for general practitioners. The duration of ophthalmology training is only half a month in whole 33-month general practice residency training. The main objective of training for general practice residents is to master the basic clinical skills of ophthalmology, to be able to accurately and timely identify eye diseases, especially those requiring urgent treatment, and to prevent the loss of visual function. This article introduces our teaching experience in ophthalmology training for general practice residents accumulated since 2014. We suggest that the trainees should pre-examine patients independently, play a role of standard patients and receive consultation from teachers. We developed a simple patient assessment form for primary care doctors, the patient who got 10 or more points of the form, should be referred to ophthalmological specialists.
RESUMEN
OBJECTIVE: To observe the clinical efficacy and safety of additional use of Cypate gingival fluid in periodontal basic therapy before surgery in the treatment of pregnancy gingival tumor. METHODS: A total of 86 patients with pregnancy gingival tumor in Second Affiliated Hospital of Qiqihar Medical University during Jan. 2015 to Jan. 2016 were divided into observation group and control group according to random number table, with 43 cases in each group. Control group received ligation and oral micro-electrosurgical surgery according to the volume of tumor. Observation group was given Cypate gingival fluid-based periodontal basic therapy (3-5 mL for gargling, 2-3 min each time, 3-5 times each day, 5 d) and then receive surgery. Clinical efficacies, gingival related indexes (gingival index, sulcular bleeding index, probing depth), quality scores of life, ADR, the occurrence of complications were observed in 2 groups. The followed-up was conducted 1 year after surgery, and the recurrence of gingival tumor was compared between 2 groups. RESULTS: No case was found shedding in the study. The total response rate of observation group was 97. 67％, which was significantly higher than 79. 07％ of control group (P＜0. 05). After treatment, the gingival related indexes of 2 groups were decreased significantly compared to before treatment, while quality scores of life were increased significantly compared to before treatment, observation group was significantly better than control group (P＜0. 05). No severe ADR or complication was found in 2 groups during treatment. Recurrence rate of gingival tumor in observation group was 2. 33％, which was significantly lower than 13. 95％ in control group 1 year after treatment (P＜0. 05). CONCLUSIONS: Compared with surgery alone, additional use of Cypate gingival fluid in periodontal basic therapy before surgery has better clinical efficacy and lower recurrence rate, with good safety.
RESUMEN
OBJECTIVE: To investigate the effects of Kangfuxin solution combined with Chuangyangling and gelatin sponge on dry socket disease in patients with type 2 diabetes mellitus after the extraction of impacted teeth. METHODS: A total of 85 patients with impacted teeth and type 2 diabetes mellitus during Jan. 2016-Jan. 2017 were divided into group A (29 cases), B (25 cases), C (31 cases) according to random number table. All patients were treated with turbine drill method; in group A, Kangfuxin solution + Absorbable gelatin sponge was used to fill the wound site; in group B, Chuangyangling+compound preparation of Kangfuxin solution and gelatin sponge were used to fill the wound site; in group C, the wounds were filled with gauze but without any drugs. All patients received routine anti-infective treatment after surgery for 5-7 d. The time of impacted teeth extraction was observed in 3 groups; granulation tissue coverage integrity rate of tooth socket and the incidence of dry socket disease 7 d after surgery, the incidence of other postoperative complications, treatment cost, satisfaction scores were also comparod. RESULTS: There was no statistical significance in the time of impacted teeth extraction or treatment cost among 3 groups (P＞0. 05). Seven days after surgery, granulation tissue coverage integrity of tooth socket and satisfaction scores were in descending order: group B＞group A＞group C; the incidence of dry sockets were in ascending order: group B＜group A＜group C, with statistical significance (P＜0. 05). The incidence of other postoperative complications as bleeding, pain, swelling, limitation of mouth opening in group A and B were significantly lower than group C, with statistical significance (尸＜0. 05). There were no statistical significance between group A and B (P＞0. 05). CONCLUSIONS: Kangfuxin solution combined with Chuangyangling and gelatin sponge can effectively increase granulation tissue coverage integrity of tooth socket, and reduce the incidence of dry socket disease and other postoperative complications in patients with type 2 diabetes mellitus, but do not increase economic burden of patients and obtain high patient satisfaction.
RESUMEN
Objective@#To investigate the value of computed tomography (CT) texture analysis in differential diagnosis of inflammatory and malignant pulmonary nodules.@*Methods@#The image data of 54 patients with lung cancer and 36 patients with pulmonary inflammatory nodules were retrospectively collected in our hospital. All the patients received chest CT scan. CT texture analysis of entropy, correlation degree and contrast ratio were performed by the MaZda software. The receiver operating characteristic curve (ROC) was established and the area under the curve (AUC) was calculated to evaluate the value of CT texture analysis in differential diagnosis of inflammatory and malignant pulmonary nodules.@*Results@#In the lung cancer group, the value of entropy, correlation degree and contrast ratio were 1.58±0.07, 0.02±0.17 and 8.79±2.59, respectively. In the inflammatory nodules group, the value of entropy, correlation degree and contrast ratio were 1.51±0.04, 0.22±0.16 and 12.53±2.24, respectively. The differences were all statistically significant (P values were 0.008, 0.027, and 0.006, respectively) between two groups. There was not statistically significant difference (P>0.05) in the CT values between the lung cancer group and the inflammatory nodule group based on the non-contrast enhanced CT scan. Meanwhile, there was no statistically significant difference (P>0.05) in the value of entropy, correlation degree or contrast ratio between two groups based on arterial phase or venous phase of contrast enhanced CT. The ROC analysis showed that the AUC in differentiating the lung cancer and inflammatory nodules was 0.821, 0.778 and 0.875, respectively. The AUC of combination of three phases was 0.931, which was higher than the AUC of entropy, correlation degree and contrast ratio respectively (P<0.01). The sensitivity was 88.9%, and the specificity was 87.5%.@*Conclusion@#CT texture analysis is a high-potential image analysis method, which can provide more information for the differential diagnosis of benign and malignant pulmonary nodules.
RESUMEN
ObjectiveTo investigate the influence of concurrent human immunodeficiency virus (HIV) infection on antiviral therapy for hepatitis C virus (HCV) in patients with chronic hepatitis C. MethodsTwenty-eight patients with hepatitis C and concurrent HIV infection (HCV/HIV group) and 28 patients with pure HCV infection (HCV group) treated in Ruzhou People′s Hospital and the Sixth People′s Hospital of Zhengzhou from 2013 to 2014 were selected and treated with common interferon combined with ribavirin as anti-HCV therapy. HCV RNA viral load and blood routine were measured at weeks 0, 12, 24, and 48 of therapy and 24 weeks after therapy, and other adverse effects were recorded in detail. The t-test was applied for comparison of continuous data between groups, and chi-square test was applied for comparison of categorical data between groups. ResultsHCV RNA viral load was gradually reduced after antiviral treatment in both groups, and the two groups showed significant differences in sustained virologic response and end-of-treatment virologic response (χ2=6744 vs 5.622, P=0.013 vs 0.024). As for adverse effects, the two groups showed decreases in leukocyte count, with significant differences between the two groups at weeks 12, 24, and 48 of therapy (t=3.422, 4.443, and 2.949, all P＜0.01). The two groups showed no significant differences in platelet count, gastrointestinal symptoms, and flu-like symptoms (all P＞0.05). ConclusionConcurrent HIV infection has varying degrees of influence on anti-HCV virologic response and adverse effects in patients with chronic hepatitis C.
RESUMEN
Gelastic epilepsy is a special refractory epilepsy accompany with ictal laughing and/or crying which can be divided into cortical induced gelastic epilepsy and hypothalamic hamartomas induced gelastic epilepsy according to their epileptogenic focus.Currently, domestic scholars had lack of systematic understanding of the mechanism and clinical treatment involved in gelastic epilepsy.Recently, foreign scholars had achieved great progress in the research of gelastic epilepsy which included the ictal laughing mechanism in gelastic epilepsy, the primary molecular mechanism in hypothalamic hamartomas induced gelastic epilepsy, the secondary epileptogenesis mechanism in hypothalamic hamartomas induced gelastic epilepsy and the clinical treatment of gelastic epilepsy.Now, the study progress of pathogenesis and clinical treatment of gelastic epilepsy were reviewed.
RESUMEN
Objective To investigate the value of dual-energy virtual unenhanced and dual-energy iodine value distribution diagram type of kidney cancer.Methods A retrospective analysis of 35 cases of renal cell carcinoma dual-energy CT scan data,compared to kidney pathology data,analyze the image quality and radiation dose dual-energy virtual unenhanced and dual energy distribution of iodine in clear cell carcinoma and non-clear cell carcinoma the differences that exist.Results Unenhanced and virtual unenhanced image quality was quite,CT value (routine unenhanced renal parenchyma 31.90±4.10 HU,abdominal aortic 45.60±6.30 HU,psoas 50.00±6.6 HU3,kidney 1.410±17.06 HU; virtual unenhanced renal parenchyma abdominal aortic 33.20±5.50 HU,48.30±8.00 HU,52.40±10.63 HU psoas kidney 0.87±17.48 HU),signal to noise ratio (routine unenhanced renal abdominal aorta 3.22±1.49,5.13±2.57,4.56±2.12 psoas kidney 3.24±2.27 virtual unenhanced renal abdominal aorta 2.73±1.08,3.79±1.64,3.23±1.35 psoas kidney 2.18± 1.57) had not significantly different (P ＞ 0.05).Clear cell carcinoma of the skin medullart junction of iodinedistribution of images Iodine (2.75±1.05) mg/ml was higher than non-clear cell carcinoma (1.25±0.72) mg/ml,the difference was statistically significant (t =7.048,P ＜ 0.05).Conclusions CT examination in patients with renal cell carcinoma virtual unenhanced image quality is similar with routine unenhanced image quality,it reduces radiation dose.The distribution of iodine can provide more diagnostic information that can help us be more intuitive and accurate judgments of the blood supply and kidney cancer subtypes.
RESUMEN
In order to study the excretion of genistein (GEN) capsule, an estrogen drugs, in human, 30 healthy volunteers were selected and orally administered 50, 100, and 300 mg genistein in an parallel study. Genistein were determined in urine by LC-MS/MS and glucuronidated genistein (GENG) were indirectly determined with enzymatic hydrolysis in urine by LC-MS/MS, and the pharmacokinetic parameters were analyzed by DAS software (ver 2.0). The result showed that the concentrations of genistein in human urine were less than 1% of the GENG, and the cumulative excretion of GEN in 48 h were 0.037, 0.134, and 0.142 mg, separately, and the urinary excretion percentage were only 0.07%, 0.13%, and 0.05%, separately. But the cumulative excretion of GENG in 48 h was 5.3, 13.8, and 15.4 mg, separately, and the urinary excretion percentage were 10.6%, 13.8%, and 5.1%, separately, and the max urinary excretive rate was 0.4, 1.0, and 1.4 mg x h(-1), separately (tmax were 6 h). Studies showed that part of drug excreted through kidney in a form of GENG in human, and the cumulative urinary excretion and the maximum excretion rate of GENG showed a proportional increase conditioned with the dose in the range of 50-100 mg, but showed non-linear increase feature in 300 mg.
RESUMEN
Objective To investigate the clinical applications of dual-source dual-energy CT and dual-energy virtual unenhanced iodine distribution technology in thoracic tumor scans.Methods CT and clinical data of 58 cases of patients with thorax tumor were analyzed.The quality score,the noise,the average lesion CT values and radiation dose were compared between dual-energy group virtual unenhanced and conventional unenhanced image.The lesion benign and malignant differential diagnosis by strengthen the distribution of iodine value in dual-energy group and strengthen the value of manual measurement in conventional CT group were compared.Results The quality scores in virtual unenhanced and conventional unenhanced image were (4.62±0.52) and (4.71±0.46) points (t =2.319,P ＞ 0.05).The noise in virtual unenhanced images and conventional unenhanced image were (8.10±1.16) and (7.30±1.06) HU (t =5.246,P＜ 0.05).The effective dose in virtual unenhanced and in conventional plain were (5.18±0.96) and (5.55±1.18) mSv (t =4.005,P ＜ 0.05).CT value distribution of iodine was correlated with enhanced CT values.Conclusions The virtual unenhanced images can show well lung disease,which meet the diagnostic requirements and may be instead of the conventional plain chest potential value.Dual-energy iodine distribution of lesions can observe blood supply more directly and more sensitively,can quantityze expression of the extent of the lesions enhanced to provide richer information for clinical diagnosis of tumor lesions.
RESUMEN
Objective To establish an isolation method for solid GTC in peripheral blood using EpCAM antibody-linked nanobeads and evaluate the sensitivity of the method and its application significance. Methods Five, ten, twenty, fifty and one hundred MCF7 (breast cancer), KYSE70 (esophageal cancer), BxPC-3 (pancreatic cancer) and 9811P (stomach cancer) cells were added into 7. 5 ml erythrocyte lysed peripheral blood obtained from healthy volunteers respectively. EpCAM antibodylinked nanobeads were used to enrich cancer cells. The recovery rates of the in vitro added cancer cells were evaluated by fluorescence microscopy. Then, the untreated thirty cases of esophageal cancer (six cases at stage Ⅰ and Ⅱ, twenty-four cases at stage Ⅲ and Ⅳ), thirty-five cases of breast cancer (fifteen cases at stage Ⅰ and Ⅱ , twenty cases at stage Ⅲ and Ⅳ), thirty cases of pancreatic cancer (five cases at stage Ⅰ and Ⅱ , twenty-five cases at stage Ⅲ and Ⅳ), thirty-three gastric cancer (thirteen cases for stage Ⅰ and Ⅱ ,twenty cases at stage Ⅲ and Ⅳ) were enrolled to enrich the peripheral blood CTC. Thirty healthy volunteers and thirty gastritis patients served as two groups of control. Meanwhile the enriched CTC was identified by IF and HE staining. FISH was used to analyze the copy number of chromosome 8 and chromosome 20 in two hundred esophageal cancer, breast cancer, pancreatic caner and gastric cancer CTC. Results After DAPI staining and mixing with 7.5 ml peripheral blood from healthy donors, the average cell recovery rates of KYSE70, MCF7, BxPC-3 and 9811P cells evaluated under fluorescence microscope were 87%, 87%, 86% and 88% (within group), and the recovery rates of 5 gradient dilution levels were 88%, 85%, 87%, 88% and 87% (intergroup). With a high sensitivity, this method was able to isolate one cancer cell in 107 white blood cells of peripheral blood. The positive rates of more than 2 CTC in the peripheral blood detected by this method were 50% (15/30) of esophageal cancer, 63% (22/35) of breast cancer, 70% (21/30) of pancreatic cancer and 61% (20/33) gastric cancer patients respectively,but no CTC was detected in the peripheral blood of healthy volunteers and gastritis patients (P = 0. 000).The aneusomy of chromosome 8 and chromosome 20 were found in 80% esophageal cancer, 75% breast cancer, 65% pancreatic cancer and 59% gastric cancer. Conclusions The CTC isolation technique with EpCAM antibody-linked nanobeads is sensitive and accurate. The aneusomy of chromosome 8 and 20 is frequent in CTC from esophageal cancer, breast cancer, pancreatic cancer and gastric cancer.
RESUMEN
Objective To investigate the clinical significance between congestive heart failure (CHF) and serum thyroxine. Methods 50 patients with CHF (7 cases of grade Ⅱ heart function,grade Ⅲ 19 cases,grade Ⅳ 24)and 30 normal persons wre selected. The serum triiodothyronine( T3 ), four-triiodothyronine( T4 ), free triiodothyronine (FT3), free triiodothyronine (FT4), thyroid stimulating hormone TSH were determined by radioimmunoassay. Results The T3, FT3 contens ( 1.95 ± 0.55) nmol/L, (2.20 ± 0.39 ) pmol/L in CHF group were lower than the control group (2.4 ± 0.50) nmol/L, ( 5.89 ± 0. 45 ) pmol/L ( t = 2. 415,2. 325, P < 0.05 ); The T3, FT3 contens ( 2.19 ± 0. 53 )nmol/L,(3.69 ± 0.57)pmol/L after treatment were significantly higher than that before treatment (t =2. 375,2. 405, P < 0.05 ); The T3, FT3 contens in cardiac function with stage Ⅳ ( 1.76 ± 0.7) nmol/L, ( 1.99 ± 0. 45 ) pmol/L were significantly lower than the control group( t = 2.245,2. 375, P < 0.05 ); Serum TT3, TT4 and cardiac function was negatively correlated ( r = -0.933, -0.383, all P < 0.05 ) , serum FT3, FT4,TSH and cardiac function were not correlated. Conclusion The changes of serum thyroid level could be used as an index of the severity of heart failure.
RESUMEN
Objective To evaluate the correlation between imaging features of spiral computed tomography(SCT) and pathology, MVD, and the expression of VEGF in renal cell carcinoma(RCC). Methods Thirty patients with RCC diagnosed by pathology underwent SCT examinations.MVD and the expression of VEGF were examined immunohistochemically using SABC techniques. Results The detection and characterization rate as well as accuracy of staging before operation about 30 RCC of multiphasic SCT scans were 100 %, 100 % and 83.3 %, respectively. In 30 cases of RCC, the mean MVD was 36±12.4. The positive expression rate of VEGF were 73.33 %. There were no correlation between the MVD and the expression of VEGF in RCC (r =0.057, P >0.05). The features of SCT: on multiphasic SCT scans, the pathological nuclear grade, the MVD and positive expression of VEGF in groups of RCC with diameter larger than 3.0 cm, central necrosis, pseudocapsule and intravenous tumor emboli were obviously higher than those of the contrast group (P <0.05, P <0.05, P <0.05, respectively). The pathological nuclear grade and MVD in groups of RCC with lymph node metastasis were higher than the contrast group (P <0.05, P <0.05, respectively). There were the positive correlation between the enhanced Hounsfield' s units in the CMP and the MVD in 30 cases of RCC(r =0.784, P <0.05). The degree of enhancement correlated well positively with the MVD in 30cases of RCC (P < 0.05). Conclusion Multiphasic enhanced SCT scan is a reliable technique in the detection, pathologic characterization of RCC. Some SCT features are closely correlated with MVD and expressions of VEGF in RCC, which could be a noninvasive method in predicting aggressiveness and metastasis.
RESUMEN
Objective To probe the value of varied magnetic resonance imaging(MRI) techniques applied in differential diagnosis of tuberculous pyonephrosis from hydronephrosis.Methods Features of MRI,including in T_1WI with/without enhancement,T_2WI,urology MRI and diffusion weighted image(DWI),in seven cases with tuberculous pyonephrosis and 10 cases with hydronephrosis pathologically confirmed were retrospectively analyzed.Results Regular T_1WI and T_2WI could show morphology of the whole kidney,destruction of renal parenchyma and empyema.T_1WI with enhancement could manifest abnormally reinforced walls of pyoid cavity,renal pelvis and calyx and ureter.Urology MRI could show morphology of the whole urinary passage with pathological changes more clearly.Accuracy of these techniques was 84.7%.DWI had the advantage of analyzing diffusion image and ADC map to understand diffusion features of water molecule,and of quantitating ADC value to differentiate tuberculous pyonephrosis from hydronephrosis,with an accuracy of 91.2% combining with DWI and other methods.Conclusion Combined application of varied MRI techniques should be highlighted in differentiation of tuberculous pyonephrosis and hydronephrosis with a higher accuracy of diagnosis.
RESUMEN
Objective To investigate the method and effect of krypton laser photocoagulation for neovascularization in retinal vein occlusion. Methods Tweenty eight eyes of 27 patients with retinal vein occlusion with neovascularization were photocoagulated by krypton-green and-red laser.The fundus changes were observed by fundus fluorescein angiography after photocoagulation. Results The neovascularization disappeared completely in 20 eyes and became smaller in 6 eyes,remained no-change in 2 eyes,and the visual acuity improved in 17 eyes (60.7%) after 6 monthes to 2.5 years of follow-up. Conclusion Krypton laser photocoagulation is obviously effective on regression of neovascularization and prevenion of vitreous hemorrhage in retinal vein occlusion.