[Clinicopathological characteristics of SMARCB1(INI1)-deficient sinonasal carcinoma].

Objective: To investigate the clinicopathological characteristics, diagnosis, differential diagnosis and prognostic factors of SMARCB1 (INI1)-deficient sinonasal carcinoma (SDSC). Methods: Sixteen cases of SDSC diagnosed in the Department of Pathology, Beijing Tongren Hospital from January 2016 to September 2020 were enrolled. Ninety-nine cases of small round cell malignant tumors of the head and neck were selected as the control, including poorly-differentiated squamous cell carcinoma (n=10), poorly-differentiated adenocarcinoma (n=5), undifferentiated carcinoma (SNUC, n=4), NUT carcinoma (n=5), neuroendocrine carcinoma (n=10), and other non-epithelial tumors [olfactory neuroblastoma (n=10), rhabdomyosarcoma (n=10), NK/T-cell lymphoma (n=10), malignant melanoma (n=10), Ewing's sarcoma/primitive neuroectodermal tumor (EWS/PNET, n=5)] and non-keratinizing undifferentiated nasopharyngeal carcinoma (n=20). The clinical and pathologic characteristics of SDSC, and immunohistochemical (IHC) expression of broad-spectrum CKpan, CK7, CK8/18, CK5/6, p63, p40, p16, INI1, NUT and neuroendocrine markers (Syn, CgA, CD56) were evaluated. In situ hybridization (ISH) was used to detect EBER and fluorescence in situ hybridization (FISH) to detect INI1 gene deletion. Results: The 16 cases of SDSC accounted for 1.3% (16/1 218) of all malignant sinonasal tumors in the author's unit during this time period, and 2.4% (16/657) of all malignant epithelial tumors. Microscopically, there was no clear squamous and adenomatous differentiation, but "rhabdoid-like" cells, are often seen. All SDSC cases were positive for CKpan and CK8/18, negative for INI1; Epstein-Barr virus was not detected by ISH; and INI1 gene deletion was observed in all 11 SDSC patients with FISH. Twelve cases were followed up for 3-47 months. One died of tumor-related diseases half a year after diagnosis, and the remaining patients were alive with tumor, the longest survival time was 47 months. Conclusion: SDSC should be differentiated from a variety of poorly-differentiated tumors in the sinonasal area. Histologically, SDSC has no clear differentiation, but the tumor cells are characteristically basal-like or rhabdoid-like, with non-specific vacuoles, translucent or vacuolar nuclei, prominent nucleoli and necrotic foci. They are negative for INI1 IHC staining, and FISH demonstrates INI1 gene deletion. The clinical prognosis is still unclear, further studies on its biologic behavior and treatment methods are warranted.

Prediction of prostate cancer aggressiveness with a combination of radiomics and machine learning-based analysis of dynamic contrast-enhanced MRI.

AIM: To investigate whether the combination of radiomics and automatic machine learning-based classification of original images from multiphase dynamic contrast-enhanced (DCE)-magnetic resonance imaging (MRI) can predict prostate cancer (PCa) aggressiveness before biopsy. MATERIALS AND METHODS: Forty consecutive biopsy-confirmed PCa patients were included. Biopsy was performed within 4 weeks after the DCE-MRI examinations. According to the time-signal-intensity curve, lesion segmentation was performed on the first and on the strongest phase of the enhancement on the original DCE-MRI images, and 1,029 quantitative radiomics features were calculated automatically from each lesion, wherein there were three datasets available (Dataset-F, Dataset-S and Dataset-FS). The variance threshold method, select k-best method and least absolute shrinkage and selection operator (LASSO) algorithm were used to reduce the feature dimensions. Five machine learning approaches leveraging cross-validation were employed, and the clinical value of each model was evaluated by area under the receiver operating characteristic curve (AUC). Correlation analysis was performed between the features of the machine learning model that achieved the best classification performance and the Gleason score (GS) of the PCa lesion. RESULTS: Eight, four, and 16 features were selected as optimal subsets in Dataset-F, -S and -FS, respectively. Among all three datasets, logistic regression (LR)-based analysis with Dataset-FS had the highest predication efficacy (AUC=0.93). Ten features in Dataset-FS showed significantly positively correlation with GS. The model performance of Dataset-F was generally better than that in Dataset-S. CONCLUSIONS: A combination of radiomics and machine learning-analysis based analysis of the union of the first and strongest phases of original DCE-MRI images can predict PCa aggressiveness non-invasively, accurately, and automatically.

[Combined use of the Solitaire AB stent and Navien delivery catheter for mechanical thrombectory of acute vertebrobasilar artery occlusion].

Objective: To investigate the efficacy and safety of mechanical thrombectory with a tri-axial system of the solitaire AB stent through a Navien delivery catheter to treatment acute vertebrobasilar artery occlusion. Methods: The clinical data of 16 consecutive patients with acute ischemic stroke of vertebrobasilar artery occlusion treated with the Solitaire AB device from March 2016 to March 2018 in Department of Neurosurgery, the First Affiliated Hospital, Medical College of Shihezi University, were extracted and then retrospectively analyzed.Recanalization rate as well as complications after treatment were analysized. Also, neurological functions of the patients before and after operation 1 weeks, measured by National Institute of Health stroke scale (NIHSS) score were compared via t test and the clinical outcomes were assessed by modified Rankin score (mRS) at 90 days after operation. Results: There were 10 male and 6 female patients with a median age of 59 years (ranging from 45 to 78 years).Fourteen patients resulted in successfully recanalization, and 2 cases failed both of whose onset to sheath mean time were 8.5 hours.The NIHSS score at 7 days was 13±7, which was significantly decreased compared to the admission NIHSS score 24±4 (P=0.000).No symptomatic intracranial hemorrhage case was found after operation.At 90 days, 8 patients achieved good outcome (mRS 0 to 2), one patient died (mRS 6),two patients moderately seriously disabled (mRS 4).Three patients resulted in moderate outcome (mRS 3).In 3 cases of death,2 patients died due to failure in recanalization,another patient died of severe pulmonary infection. Conclusion: The results suggest that this technique of a tri-axial system used of the Solitaire AB stent through a Navien delivery catheter can effectively retrieve clots from the occlusive artery and improves functional outcome in patients with acute ischemic stroke of vertebrobasilar artery.

Detection of hand-foot-mouth disease and its spatial-temporal Epidemiological characteristics with GIS platform.

The aim of this study is to investigate the main category of hand-foot-mouth (HFM) virus and analyze the distribution characteristics and susceptible population of HFM disease in China. Infants who have had HFM disease for less than 7 days were selected from the First Affiliated Hospital of Guangxi Medical University, Guangxi, China. Various specimens were collected from the infants, and EV71 and CA16 nucleic acid detections were performed using fluorescence quantitative assay. The positive results of the specimens were compared to determine the components of the pathogen. Moreover, the data of the target cases were analyzed based on Geographic Information System (GIS) to obtain the spatial-temporal epidemiological features of HFM disease in China. The detection rate of HFM virus in the throat swab, feces, bleb fluid and cerebrospinal fluid were 75%, 81.13%, 85.71% and 25%, respectively, indicating that the detection rate of virus in the bleb fluid was the highest. When the detection was based on more than one specimen, it was found that the positive rate was higher compared to detection based on a single specimen. The positive detection rate of EV71 in the target specimens was significantly higher than that of CA16 and mixed infection. Moreover, CA16 infection was usually accompanied by EV71 infection. As to spatial-temporal distribution, hand-foot-month disease broke out in the South of China in April, then spread to the north, and diminished in July. There was a notable difference in the number of cases between different provinces. EV71 and CA16 are the main viruses inducing HFM disease, especially EV71. Fluorescence quantitative polymerase chain reaction with high sensitivity can be used to detect the copy number of viruses, which is applicable to the early diagnosis of HFM disease. The incidence of HFM disease is notably different according to the influence of time, geographical space, gender and the living conditions of the children. Early diagnosis and treatment based on scientific methods are needed to reduce the incidence of severe diseases and avoid death.

Value of texture analysis based on enhanced MRI for predicting an early therapeutic response to transcatheter arterial chemoembolisation combined with high-intensity focused ultrasound treatment in hepatocellular carcinoma.

AIM: To evaluate the potential value of texture analysis (TA) based on contrast-enhanced magnetic resonance imaging (MRI) for predicting an early response of patients with hepatocellular carcinoma (HCC) who were treated with transcatheter arterial chemoembolisation (TACE) combined with high-intensity focused ultrasound (HIFU). MATERIALS AND METHODS: Patients with HCC (n=89) who underwent contrast-enhanced MRI at 1.5 T 1 week before and 1 week, 1 month, and 3 months after TACE/HIFU were included in this retrospective study. Early responses were evaluated by two radiologists according to the Response Evaluation Criteria in Cancer of the Liver (RECICL). An independent Student's t-test and the Mann-Whitney U-test were used to compare the TA parameters between the complete response (CR) group and the non-complete response (NCR) group. Logistic regression and receiver operating characteristic (ROC) curve analyses were performed to assess the predictive value of the NCR lesions. RESULTS: Among the 89 patients, 58 showed CR and 31 showed NCR. Before TACE/HIFU, the CR group showed higher uniformity and energy but lower entropy than the NCR group (p<0.05). After TACE/HIFU, the CR group showed higher uniformity and energy but lower entropy and skewness than the NCR group (p<0.05). The logistic regression and ROC curve analyses showed that the entropy before TACE/HIFU and the skewness and entropy 1 week after TACE/HIFU were predictors of an early response. CONCLUSION: TA parameters based on contrast-enhanced MRI images 1 week before and after TACE/HIFU may act as imaging biomarkers to predict an early response of patients with HCC.

Aclidinium bromide inhibits human glioma cell proliferation, migration and invasion and promotes apoptosis via the PI3K/AKT signaling pathway.

This study investigates the anti-cancer potential of Aclidinium bromide (INN) in glioblastoma. Glioblastoma cell lines U251 and U87 were treated with INN and its effects on cell migration and invasion were assessed by transwell migration and invasion assays., The effects of INN on proliferation and apoptosis were detected by CCK-8 kit and flow cytometry, and Western blotting determined anti-apoptotic proteins and signaling pathway changes. The results show that INN effectively suppressed proliferation, migration and invasion and induced apoptosis in U251 and U87 cells, respectively. Furthermore, the expression levels of the Bcl-2 anti-apoptotic protein was significantly decreased while Bax and caspase-3 expression were both increased in glioblastoma cells (all, p<0.05). Moreover, INN inactivated the PI3K/AKT signaling pathway by down-regulating the level of p-AKT, p-mTOR, P70 and CyclinD1 (all, p<0.05). In conclusion, our data suggests that INN could provide novel anticancer therapy in the treatment of glioblastoma.

Analysis of hemorrhagic fever with renal syndrome and its pathogenic gene sequence based on geographic information system.

This study analyzed the temporal-spatial distribution characteristics, epidemiological characteristics and gene sequences of hemorrhagic fever with renal syndrome (HFRS) in Guangxi, with the intention of providing a theoretical and technical support for the prevention of HFRS. A map of the incidence of HFRS of different cities in Guangxi was drawn up using the Geographic Information System (GIS) to investigate the epidemiological characteristics and infection source of HFRS between 2013 and 2016. Guangxi has a low incidence of HFRS, and autumn and winter are the main high-incidence seasons. Cases of HFRS were reported in all regions in Guangxi except Laibin city between 2013 and 2016. The distribution of cases in the four years suggested that Guilin, Nanning, Hechi and Wuzhou were the main infected regions, especially the local areas in the north of Guilin. The nucleotide and amino acid of S fragment and M fragment of Hantaviruses (HV) detected were highly homologous, and no obvious variation was found. Through analyzing the space-time characteristics, epidemiological characteristics and gene sequence of HFRS in Guangxi, it was found that areas rich in water, grass and moisture, such as paddy fields, are the main active areas for the host of HFRS.

Inhibition of subcutaneously implanted human pituitary tumor cells in nude mice by LRIG1.

The aim of this study was to explore the inhibition of subcutaneously implanted human pituitary tumor cells in nude mice by LRIG1 and its mechanism. For this study, athymic nude mice were injected with either normal pituitary tumor RC-4B/C cells or LRIG1-transfected RC-4B/C cells. We then calculated the volume inhibition rate of the tumors, as well as the apoptosis index of tumor cells and the expression of Ras, Raf, AKt, and ERK mRNA in tumor cells. Tumor cell morphological and structural changes were also observed under electron microscope. Our data showed that subcutaneous tumor growth was slowed or even halted in LRIG1-transfected tumors. The tumor volumes were significantly different between the two groups of mice (χ2 = 2.14, P < 0.05). The tumor apoptosis index was found to be 8.72% in the control group and 39.7% in LRIG1-transfected mice (χ2 = 7.59, P < 0.05). The levels of Ras, Raf, and AKt mRNA in LRIG1-transfected RC-4B/C cells were significantly reduced after transfection (P < 0.01). Transfected subcutaneous tumor cells appeared to be in early or late apoptosis under an electron microscope, while only a few subcutaneous tumor cells appeared to be undergoing apoptosis in the control group. In conclusion, the LRIG1 gene is able to inhibit proliferation and promote apoptosis in subcutaneously implanted human pituitary tumors in nude mice. The mechanism of LRIG1 may involve the inhibition of the PI3K/ Akt and Ras/Raf/ERK signal transduction pathways.

CT and MRI features of patients with diastematomyelia.

OBJECTIVE: To evaluate computed tomography (CT) and magnetic resonance imaging (MRI) features in patients with diastematomyelia and to investigate clinical characteristics of this lesion. STUDY DESIGN: A retrospectively study. SETTING: The Second Affiliated Hospital, School of Medicine, Xi'an Jiaotong University. METHODS: A total of 82 diastematomyelia cases were retrospectively studied. All the patients underwent neurological examinations as well as MRI and CT of the spine. A self-established neurological functional grading system was used, and posterior tibial nerve somatosensory cortical-evoked potential (PTNSCEP) was measured to assess the neurological status of the patients. Imaging features of symmetry of splitting, presence of septum, location of lesion and number of split segments were studied. The neurological functional grading, PTNSCEP, and imaging findings were then analyzed and compared, and the difference was considered to be significant if P-value was lower than 0.05. RESULTS: Neurological functional grading and latency of PTNSCEP were significantly different but related in terms of symmetry of splitting, presence of septum and location of lesion. Although no significant differences were present in the number of split segments, the severity of the neurological functional grading and PTNSCEP impairment were not related to the number of split segments. CONCLUSION: The imaging features in diastematomyelia are characteristic and relate well with the clinical manifestations according to neurological functional grading and PTNSCEP measurement, except the number of split segments.

Characteristics and management of occult intrasacral extradural cyst in children.

Occult intrasacral extradural cyst is a rare entity. Since little about this lesion has been reported in the literature, this study herein demonstrates by cases some of the clinical features and surgical treatment of occult intrasacral extradural cyst in children. A series of 4 children, 2 boys and 2 girls aged from 4 years and 6 months to 11 years, with occult intrasacral extradural cyst were reviewed. All patients underwent neurological examinations and magnetic resonance imaging. Of these 4 patients two had urinary incontinence in daytime, one frequent micturition, and one numb in saddle area. There were no abnormal findings on physical or laboratory examination. Whole excision of the cyst and ligation of the tract between the cyst and thecal sac were performed for all the patients. No complications such as cerebrospinal fluid leakage and infection were found after operation. All cases made complete recovery and have been asymptomatic at follow-up. The clinical and radiological features of occult intrasacral extradural cyst are characteristic in children. Magnetic resonance imaging is the choice of investigation and surgery is curative.

Studies of lithium ion dynamics in paramagnetic cathode materials using (6)Li 1D selective inversion methods.

The effectiveness of two different selective inversion methods is investigated to determine timescales of Li ion mobility in paramagnetic Li intercalation materials. The first method is 1D exchange spectroscopy, which employs a 90°-τ(1)-90° sequence for selective inversion of a Li resonance undergoing site exchange. The experiment is most easily applied when the first delay period, τ(1), is set to the frequency difference between two resonances undergoing ion exchange. This enables the determination of ion hopping timescales for single exchange pair systems only. To measure ion dynamics in systems having more than one exchange process, a second selective inversion method was tested on two paramagnetic Li intercalation materials. This second technique, replaces the 90°-τ(1)-90° portion of 1D EXSY with a long, selective shaped pulse (SP). Two paramagnetic solid-state materials, which are both cathode materials for lithion ion batteries, were chosen as model compounds to test the effectiveness of both the selective inversion methods. The first compound, Li(2)VPO(4)F, was chosen as it hosts two Li sites with 1-exchange process. The second model compound is a 3-site, 3-exchange process system, Li(2)VOPO(4). For the 2-site material, Li(2)VPO(4)F, the timescales of the single A-B exchange process were found to be within error of one another regardless of the inversion method. For the 3 Li-site material Li(2)VOPO(4), the three exchange processes, AB, BC, and AC, were found to be on the millisecond timescale as revealed using the SP method. These timescales were determined over a variable temperature range where activation energies extended from 0.6 ± 0.1 eV up to 0.9 ± 0.2 eV.

Evaluation of normal fetal pulmonary veins from the early second trimester by enhanced-flow (e-flow) echocardiography.

OBJECTIVES: To explore the feasibility of using enhanced-flow (e-flow) imaging technology to identify fetal pulmonary veins and establish gestational age-specific reference values at 12-40 weeks' gestation. METHODS: The pulmonary venous internal diameter, peak systolic and diastolic flow velocities and visualization rate were analyzed in 332 normal fetuses at 12-40 weeks of gestation. Two-dimensional gray-scale (2D) ultrasound, color Doppler and e-flow imaging were used to detect the pulmonary veins in the four-chamber view by taking the lung as the penetration window. RESULTS: The pulmonary veins could be visualized as early as 12 weeks' gestational age by e-flow imaging. The right and left pulmonary venous internal diameters and peak systolic and diastolic flow velocities increased with increasing gestational age. Between 12 and 40 gestational weeks, the internal diameter and both the systolic and diastolic flow velocities of the fetal right pulmonary vein were significantly larger than were those of the left vein (P < 0.05). Of 118 fetuses at 12-22 gestational weeks, the visualization rate of the four pulmonary veins (left superior and inferior, right superior and inferior) was 5.9% (7/118) by 2D ultrasound, 41.5% (49/118) by color Doppler and 61.9% (73/118) by e-flow imaging. The visualization rate by e-flow imaging was significantly higher than that using the other two techniques (P < 0.001). CONCLUSION: e-flow imaging is apparently a feasible and promising technology with which to identify the fetal pulmonary veins in the early stages of the second trimester.

[Ruptured chordae tendineae of tricuspid valve in neonate with intractable persistent pulmonary hypertension: a case report and literature review].

Objective: To analyze the clinical characteristics and treatment of tricuspid valve prolapse caused by chordal rupture complicated with persistent pulmonary hypertension in neonates. Methods: The clinical data of a male neonate with tricuspid valve prolapse complicated with persistent pulmonary hypertension admitted to the Neonatal Intensive Care Unit of Children's Hospital of Hebei Province in November 2018 was analyzed retrospectively. Related literature up to September 2020 was searched with the strategy of "(neonate OR newborn) AND (tricuspid valve prolapse) AND (rupture OR necrosis) AND (papillary muscle OR chordae tendineae) AND (pulmonary hypertension)" in Wanfang, CNKI and PubMed database in Chinese and English. The characteristics of the disease were summarized. Results: A male full-term neonate was admitted due to presenting severe cyanosis for 9 hours. He was born by caesarean section and presented severe cyanosis and dyspnea at 10 min of ages, unresponsive to the positive airway pressure resuscitation. After 9 hours of mechanical ventilation, there was no improvement. Thus he was transferred to Children's Hospital of Hebei Province. On admission, the initial blood gas analysis showed an arterial partial pressure of oxygen of 22.5 mmHg (1 mmHg=0.133 kPa). The echocardiography revealed prolapsed anterior leaflet of tricuspid valve, severe tricuspid regurgitation (TR) and pulmonary artery hypertension, and right to left shunt via a patent foramen ovale. The arterial duct was closed. The chest X-ray was normal. The boy was treated with nitric oxide, milrinone, and continued mechanical ventilation initially. Addition of prostacyclin analog (treprostinil) on day 3 led to significant improvement of pulmonary blood flow, oxygenation, and stabilization, so that the extracorporeal membrane oxygenation therapy was avoided. At 11 months after birth, the boy underwent cardiac surgery. At surgery, the rupture of chordal tendineae in anterior leaflet of tricuspid valve was found. Tricuspid annuloplasty, valvuloplasty and repair of patent foramen ovale were successfully performed. The follow-up echocardiogram at postoperative 3 months showed only mild tricuspid insufficiency. The boy was well at last follow-up at 22 months of age with normal cognitive skill development. According to literature, 20 cases of papillary muscle or chordae tendineae rupture in neonates had been reported in 12 English papers. Among the total 21 neonates, there were 12 male infants and only one premature infant with gestational age of 33 weeks. They presented with profound cyanosis soon after birth. All of them received endotracheal intubation and mechanical ventilation. Other treatments included inhalation of nitric oxide, intravenous milrinone, vasoactive drugs, diuretics and prostacyclin, etc. Extracorporeal membrane oxygenation (ECMO) was used in 6 infants as a bridge to surgical treatment. Two cases reported earlier death of cardiopulmonary failure without operation and the rest 19 survived after surgery. The followed surgery or autopsy revealed that all of them had tricuspid valve prolapse, rupture of papillary muscle or chordae tendineae. Conclusions: The severe TR resulting from rupture of papillary muscle or chordate tendineae in neonates is rare and could cause severe hypoxemia. Early recognition, adequate cardiopulmonary support to stabilize the hemodynamic status and timely surgery can significantly reduce the mortality.

Double activation improves rabbit freeze-thawed oocytes developmental potential.

OBJECTIVE: To investigate the effects of various activation methods on freeze-thawed rabbit oocytes developmental potential. METHODS: Rabbit oocytes were vitrified by cryoleafs and cryoprotected with ethylene glycol and propanediol. After thawing, the oocytes were fertilized by intracytoplasmic sperm injection (ICSI). Surviving oocytes after ICSI were divided into five groups at random. Group 1: Oocytes (n = 30) activated 1 h after ICSI by calcium ionomycin (I0634); Group 2: Oocytes (n = 26) activated by strontium chloride an hour after ICSI; Group 3: Oocytes (n = 33) activated by I0634 twice; Group 4: Oocytes (n = 28) were activated by strontium chloride twice; CONTROL GROUP: Inactivated oocytes (n = 39). Blastocysts derived from each group were transplanted to recipient rabbits. RESULTS: Rates of fertilization, cleavage and blastocyst formation of Group 3 were higher than those of Group 1 and Group 2 (81.8% vs 33.3% vs 53.8%, 54.5% vs 16.7% vs 26.9%, p < 0.05; 15.2% vs 3.3% vs 7.7%, p > 0.05). The rabbit transplanted with embryos derived from Group 3 became pregnant. Embryos derived from double activation could implant into endometrium. CONCLUSION: Double activation may increase freeze-thawed oocytes developmental potential. After activation, oocytes cleavage velocity may be faster than that of oocytes without activation.

[Diagnosis of adult Philadelphia chromosome-like acute lymphoblastic leukemia by fluorescence in situ hybridization].

Objective: To establish a screening system of adult Philadelphia chromosome-like acute lymphoblastic leukemia (Ph-like ALL) by fluorescence in situ hybridization (FISH) . Method: Based on the genetic characteristics of Ph-like ALL, FISH probes were designed for ABL1, ABL2, JAK2, EPOR, CRLF2, CSF1R, PDGFRB, and P2RY8 gene breakpoints, which were used to screen Ph-like ALL in B-ALL patients without BCR-ABL1, ETV6-RUNX1, MLL, and E2A gene arrangement. Furthermore, it was analyzed in combination with flow immunophenotype, next-generation sequencing for targeted gene mutations, and RNA sequencing (RNA-seq) . Results: A total of 189 adult B-ALL patients diagnosed in Nanfang Hospital from January 2016 to April 2019 were enrolled in this study. Using FISH and/or PCR, BCR-ABL1, ETV6-RUNX1, MLL, or E2A arrangement was detected in 83 of them, and Ph-like ALL was detected by FISH in the other 106, resulting in the presence of typical gene arrangements of Ph-like ALL in 12 patients (11.3% , 12/106) . Validated by RNA-seq, the sensitivity and specificity of FISH for Ph-like ALL were 71.4% and 95.8% , respectively. After further analysis with immunophenotype, targeted gene mutations, and RNA-seq, 14 (13.2% , 14/106) were diagnosed with Ph-like ALL. Conclusion: This data shows high specificity of FISH for identification of Ph-like ALL and combining immunophenotype and sequencing technology can improve the diagnostic system.

Mechanism of lncRNA DUXAP8 in promoting proliferation of bladder cancer cells by regulating PTEN.

OBJECTIVE: To evaluate the lncRNA DUXAP8 expression in bladder cancer and its mechanism. PATIENTS AND METHODS: Clinical specimens were analyzed. The expression of lncRNA in bladder cancer and adjacent tissues was detected using qRT-PCR. The χ2-test analysis was used to analyze the relationship between lncRNA DUXAP8 expression and clinicopathological information in patients with bladder cancer. The tumor cell activity and cell proliferation were measured by cell counting kit-8 (CCK8) and colony formation assay. We utilized polymerase chain reaction (PCR) to access PTEN expression in bladder cancer and adjacent tissues. Pearson correlation analysis was utilized for evaluating the relationship between PTEN and lncRNA DUXAP8. Western blot was used for detecting protein expression. RESULTS: LncRNA DUXAP8 expression was higher in bladder cancer tissues; it was in a positive correlation with the TNM stage and tumor size, but negatively correlated with the total survival time. Knockdown of DUXAP8 decreased cell viability and cellular proliferation. Lower expression of PTEN gene was found in bladder cancer compared with that in adjacent tissues. Pearson correlation analysis showed that PTEN was negatively correlated with DUXAP8; knockdown of DUAP8 increased the expression of PTEN. Overexpressing DUAP8 increased protein level of PTEN, but decreased cell viability. CONCLUSIONS: Our results pointed out that lncRNA DUXAP8 was overexpressed in bladder cancer tissues, which can promote the progression of bladder cancer through inhibiting PTEN.

Screening and identification of a tumor specific methylation phenotype in the colorectal laterally spreading tumor.

OBJECTIVE: We screened and identified the differential expression of the methylation phenotype in the whole genome of colorectal laterally spreading tumor (LSTs). MATERIALS AND METHODS: 3 tissue samples of colorectal polypoid adenomas (PAs), 3 tissue samples of LSTs and 3 tissue samples of colon cancer were analyzed with a high-density gene chip, and about 450,000 methylation sites were detected covering approximately 95% of the CpG islands. The Delta Data screening was taken through a cluster analysis of methylation phenotype differential expression. 50 tissue samples each of PAs patients, LSTs patients, and colorectal cancer patients were selected. Methylation-specific PCR (MSP) was used to detect RASSF1A and WIF-1 methylation levels. He RT-PCR method was used to detect the relative mRNA expression levels for methylation expression identification. RESULTS: The degree of LST methylation was higher than that of PAs, and 1234 genes were found to have a lower expression when compared to colorectal cancer samples. 764 genes had a higher expression when compared to colorectal cancer, and 559 genes lower expression when compared to PAs. The average methylation level of LSTs was higher than that of PAs, and lower than that of colorectal cancer. The chromosomal location was taken on these 1234 genes, which were higher than that of PAs, and lower than that of colorectal cancer; 518 genes were located on chromosome No. 2 (41.98%), 236 on No. 5 (19.12%), 357 on No. 8 (28.93%), and 123 on No. 10 (9.97%). According to clustering analysis, DNA differentially methylated sites were mainly on genes of cell adhesion molecules regulation, signaling pathways, energy transduction, cell cycle and apoptosis. The positive rate of RASSF1A and WIF-1 methylation in the tissues of LSTs patients were higher than that of PAs, and lower than that of colorectal cancer; differences were statistically significant (p<0.05). The relative expression levels of RASSF1A and WIF-1mRNA in the tissues of LSTs patients were lower than that of PAs, higher than that of colorectal cancer, and the difference was statistically significant (p<0.05). CONCLUSIONS: The administration of high-density gene chip technology has a good application value to screen the differential expression of LSTs gene methylation phenotype. Results are consistent with the identification results.

Risk factors associated with mortality from vascular thromboembolic events in patients diagnosed with non-small cell lung cancer: a population-based analysis.

BACKGROUND: Lung cancer patients are at increased risk for vascular events possibly due to cancer induced hypercoagulation. AIM: The purpose of this study was to evaluate risk factors associated with the mortality from vascular thromboembolic events in patients diagnosed with non-small cell lung cancer (NSCLC). DESIGN: Retrospective population-based analysis. METHODS: We used Surveillance, Epidemiology and End Results Program for 2004-13 and evaluated 199 337 patients with NSCLC. Univariate and multivariate subdistribution hazard regression models were used to identify potential risk factors for mortality from vascular thromboembolic events. Stratification analysis against clinical stage was performed to determine if the severity of the disease influenced the identified associations. RESULTS: Multivariate Cox regression analysis demonstrated that increased risk of mortality due to vascular thromboembolic events was associated with age, black race, non-adenocarcinoma histology, surgical treatment alone (all, P < 0.001) and north central region of SEER registry (P = 0.003). Female gender (P < 0.001), Asian or Pacific Islander race (P = 0.001), multiple co-existing primary cancers and late cancer stages (both, P < 0.001) were associated with significantly lower risk of mortality due to vascular thromboembolic events. The significant predictors of mortality from the vascular thromboembolic event were dependent on the stages of the disease. CONCLUSIONS: Risk factors associated with mortality from the vascular thromboembolic events in NSCLC patients identified in this study can promote awareness and may help to identify groups of patients that can benefit from anti-thrombotic prophylaxis measures.