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Objective:To investigate the effect of epidermal growth factor receptor tyrosine kinase inhibitor on the radiosensitivity of human non-small cell lung cancer cells and its possible mechanism.Methods:Human non-small cell lung cancer cells H1299 were cultured in vitro. CCK-8 was used to detect the toxic effects of erlotinib on H1299 cells, IC 50 and IC 20 were calculated, and IC 20 was utilized as the drug concentration for subsequent experiments. The colony formation assay was performed to identifiy the effect of X-ray combined with erlotinib on H1299 cells, the radiosensitivity parameters were calculated, and the cell survival curves were delineated. Flow cytometry was conducted to detect the cell cycle distribution and apoptosis. Western blot analysis was used to detect the expression of EGFR/PI3K/AKT pathway and apoptosis-related proteins. Results:Erlotinib exerted inhibitory effect upon the proliferation of H1299 cells, IC 50 was calculated as 27.3 μmol/L, and 3.3 μmol/L for IC 20. X-ray combined with IC 20 concentration of erlotinib could reduce the cloning ability of H1299, increased the proportion of G 0/G 1 phase and G 2/M phase, decreased the proportion of S phase, aggravated cell apoptosis, down-regulated the expression of pEGFR and pAKT proteins, and up-regulated the expression of apoptosis-related proteins including Active Caspase 3 and Cleaved PARP. Conclusions:Erlotinib exerts a radiosensitizing effect on H1299. The possible mechanism is that erlotinib combined with radiation can suppress the EGFR/PI3K/AKT pathway, reduce the ability of repairing cell damage, change cell growth cycle and induce cell apoptosis.
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Objective:To investigate the differences in CT imaging features of head and neck mucoepidermoid carcinomas (MEC) from different origins and different histological grades.Methods:Clinical and CT imaging findings of 53 patients with pathologically proved MEC in the First Affiliated Hospital of Kunming Medical University admitted from January 2009 to May 2019 were retrospectively reviewed. On the basis of origins, all MECs were divided into 2 groups: large salivary gland group (23 cases) and small salivary gland group (30 cases). All MECs were further divided into 3 groups based on histological grades: highly differentiated (19 cases), moderately differentiated (28 cases) and poorly differentiated (6 cases). The CT imaging features of MEC from different origins and different histological grades (including location, number, size, morphology, boundary, density, calcification, cystic cavity, necrosis, bone changes, flat CT scan value, arterial phase CT enhancement value-added, venous phase CT enhancement value-added, enhancement method, adjacent structure invasion, cervical lymph node metastasis and distant metastasis) were analyzed and compared using t test, χ 2 test, Fisher exact probability or rank-sum test. Results:Comparisons of characteristics between different origins: only lesion size, morphology, bone changes, and plain CT values ( P<0.05) was significantly between different origin groups. There was no significant difference of residual image features ( P>0.05). Compared with MECs derived from large salivary glands, the small salivary gland group had larger MEC lesions, irregular shapes and was prone to have bone changes (including expansion and destruction). In addition, the plain scan CT value of MEC from the large salivary glands was slightly lower than that of the small salivary glands MEC (all P<0.05). Comparison of characteristics among different histological grade groups: only cystic cavity was statistically different (χ2=8.045, P=0.015). Compared with poorly differentiated MEC, highly differentiated MEC was more prone to have cysts (χ2=7.707, P=0.012). Conclusion:There are some differences in CT findings of head and neck MEC from different origins. The cystic cavity has reference value for evaluating histological grade.
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Objective@#To investigate the expression and clinical significance of long-chain non-coding RNA brain cytoplasmic RNA 1 (BCYRN1) in serum of patients with non-small cell lung cancer.@*Methods@#74 patients with non-small cell lung cancer (NSCLC) diagnosed and treated in our hospital were selected as the experimental group, and 50 healthy subjects were selected as the control group. The expression of BCYRN1 in serum of NSCLC and control group was detected by real-time quantitative polymerase chain reaction (qRT-PCR). The patients′ clinical pathology data were collected and followed up. To analyze the relationship between the expression of serum BCYRN1 and clinicopathological parameters of NSCLC patients, and the relationship between BCYRN1 expression in the diagnosis and prediction of NSCLC prognosis.@*Results@#The relative expression of BCYRN1 in serum of NSCLC patients was 2.84±0.95, which was significantly higher than that of healthy controls (1.16±0.50) (P<0.05). The level of serum BCYRN1 in patients with NSCLC with tumor size >3 cm was significantly higher than that in patients with tumor size ≤3 cm (P<0.05). The level of BCYRN1 in patients with tumor node metastasis (TNM) Ⅲ+ Ⅳ was significantly higher than that in patients with stage Ⅰ+ Ⅱ (P<0.05). Patients with low differentiation and positive lymph node metastasis had higher serum BCYRN1 than those with moderate to high grade and lymph node metastasis (P<0.05). The receiver operating characteristic (ROC) curve analysis showed that the area under the curve was 0.847 (95% CI: 0.772-0.922, P=0.000), and the sensitivity and specificity were 68.9% and 88.0%, respectively. The median progression free survival (PFS) (15 vs 21 months) and overall survival (OS) (19 vs 28 months) of patients with high and low expression of BCYRN1 were statistically significant (P<0.05). High expression of BCYRN1 was an independent risk factor for overall survival in patients with NSCLC.@*Conclusions@#BCYRN1 is highly expressed in the serum of NSCLC patients, and high expression of BCYRN1 is closely related to the poor prognosis of patients with NSCLC. It can be used as a novel biomarker and diagnostic target for NSCLC.
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Objective To investigate the expression and clinical significance of long-chain noncoding RNA brain cytoplasmic RNA 1 (BCYRN1) in serum of patients with non-small cell lung cancer.Methods 74 patients with non-small cell lung cancer (NSCLC) diagnosed and treated in our hospital were selected as the experimental group,and 50 healthy subjects were selected as the control group.The expression of BCYRN1 in serum of NSCLC and control group was detected by real-time quantitative polymerase chain reaction (qRT-PCR).The patients' clinical pathology data were collected and followed up.To analyze the relationship between the expression of serum BCYRN1 and clinicopathological parameters of NSCLC patients,and the relationship between BCYRN1 expression in the diagnosis and prediction of NSCLC prognosis.Results The relative expression of BCYRN1 in serum of NSCLC patients was 2.84 ± 0.95,which was significantly higher than that of healthy controls (1.16 ± 0.50) (P ＜ 0.05).The level of serum BCYRN1 in patients with NSCLC with tumor size ＞ 3 cm was significantly higher than that in patients with tumor size ≤3 cm (P ＜ 0.05).The level of BCYRN1 in patients with tumor node metastasis (TNM) Ⅲ +Ⅳ was significantly higher than that in patients with stage Ⅰ + Ⅱ (P ＜ 0.05).Patients with low differentiation and positive lymph node metastasis had higher serum BCYRN1 than those with moderate to high grade and lymph node metastasis (P ＜ 0.05).The receiver operating characteristic (ROC) curve analysis showed that the area under the curve was 0.847 (95％ CI:0.772-0.922,P =0.000),and the sensitivity and specificity were 68.9％ and 88.0％,respectively.The median progression free survival (PFS) (15 vs 21 months) and overall survival (OS) (19 vs 28 months) of patients with high and low expression of BCYRN1 were statistically significant (P ＜ 0.05).High expression of BCYRN1 was an independent risk factor for overall survival in patients with NSCLC.Conclusions BCYRN1 is highly expressed in the serum of NSCLC patients,and high expression of BCYRN1 is closely related to the poor prognosis of patients with NSCLC.It can be used as a novel biomarker and diagnostic target for NSCLC.
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Objective@#To investigate the value of CT wavelet texture analysis based on primary tumor of papillary thyroid carcinoma (PTC) in predicting central lymph node metastasis (CLNM).@*Methods@#A retrospective analysis was performed to 250 patients (307 nodules) who pathologically confirm with PTC in the First Affiliated Hospital of Kunming Medical University from December 2013 to August 2019. Thyroid dual phase scanning was performed in all patients within two weeks before surgery. All patients underwent central or total cervical lymph node dissection, among which 160 cases (189 nodules) were classified as training sets, while 90 cases (118 nodules) were in the verification sets. Besides, all patients were divided into CLNM group and no CLNM group according to pathology. The DeepWise software were used to manually delineate PTC primary nodules on venous phase CT images, and 576 wavelet texture features were extracted. The differences of texture feature parameters between the two groups were compared. The top 10 wavelet texture features of the area under curve (AUC) value were manually selected as the best parameters. Multivariable logistic regression analysis was used to establish and verify the model, the optimal cutoff value was found by using receiver operating characteristic curve analysis.@*Results@#Totally 124 features were statistical difference between the two groups. The top 10 characteristic parameters for manual diagnosis with AUC values ranged from 0.599 to 0.630 (P<0.05), multi-collinearity test and multi-logstic regression analysis showed that there was no collinear correlation between the above 10 features, and small-area low-gray emphasis was an independent predictor of risk factors. The AUC value, sensitivity, specificity, and accuracy of the predictive model for the diagnosis of CLNM in the training set were 0.693, 62.84%, 60.47%, 62.96% and validation set were 0.602, 64.95%, 33.33%, and 59.32%, respectively.@*Conclusion@#Wavelet texture analysis in CT venous phase may allow detection of CLNM of PTC.
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Purpose To explore the feasibility of low-kV sinogram affirmed iterative reconstruction (SAFIRE) in thyroid CT examination.Materials and Methods Eighty patients who had taken thyroid examination through dual-source dual-energy CT were retrospectively analyzed and were divided into group A,B and C according to different tube voltages.Group A was with linear fusion (equal to 120 kV),group B 100 kV combined with SAFIRE and group C 80 kV combined with SAFIRE.CT value,signal noise ratio (SNR),contrast noise ratio (CNR),background noise and subjective scoring of normal and lesion thyroid tissues during arterial and venous phase of images in the three groups were compared.Image nodular morphology (irregular shapes,enhanced ring around the tumor,gravel calcification and segmental defects) in the three groups were analyzed to diagnose difference of sensitivity,specificity and accuracy of the malignant nodules.Results Background noise in group B and C during arterial and venous phase and CT value of normal thyroid and lesion tissues were both higher than those of group A.The difference was of statistical significance (P＜0.01).Difference of SNR and CNR of normal thyroid during arterial phase,CNR of lesion tissues in group A and C and normal thyroid CNR and lesion tissues SNR during venous phase was of no statistical significance (P＞0.05) and all were higher than those of group B.SNR difference of normal thyroid during venous phase in each group was of statistical significance (P＜0.05) and value in group C was the highest.Subjective scoring in group B and C and sensitivity and accuracy used for malignant thyroid nodules diagnosis were of no statistical difference (P＞0.05) and all were higher than that of group A.Conclusion Low-kV SAFIRE can ensure image quality and diagnostic accuracy improvement as well as radiation dose reduction for thyroid CT examination.
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Objective To determine the contents of four effective constituents in Euphorbiae Semen decoction;To provide evidence for Euphorbiae Semen decoction into clinical application. Methods Established quantitative analysis multi-components by single marker method was used to determine the contents of diterpenoids constituents, such as euphorbia storoid, euphorbia factor L2, and euphorbia factor L3. HPLC method was used to determine the contents of aesculetin. Results Contents of euphorbia storoid, euphorbia factor L2, and euphorbia factor L3 in smashed Euphorbiae Semen decoction were 0.015 9%, 0.005 9% and 0.024 1%, respectively. However, the contents of the above three constituents could not be detected in whole Euphorbiae Semen decoction. The content of aesculetin (0.693 6%) in smashed Euphorbiae Semen decoction was more than that in whole Euphorbiae Semen decoction (0.288 2%). Conclusion Decoction digestion effect of diterpenoids constituents in Euphorbiae Semen decoction is not good. Decocting with water is not suitable for the clinical application of Euphorbiae Semen for purgation and diuresis. Aesculetin in smashed Euphorbiae Semen decoction has good decoction digestion effect, in which clinical use for antisepsis and anti-inflammation is effective.