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简介：AbstractGastric cancer (GC) is a common malignancy and is the third leading cause of cancer-related death. At present, there is no simple and effective screening method for early-stage GC, and the treatment results and prognosis are poor. With the continuous improvement of molecular biology techniques, research on circular RNA (circRNA) has gradually expanded over time. Much data supports the role of circRNA in tumorigenesis. Moreover, due to its structural specificity and biological stability, circRNA is anticipated to be a potential biomarker for tumor diagnosis. Studies have confirmed that circRNA can participate in the proliferation, invasion, metastasis, and apoptosis of GC. These findings will lead to novel directions for the diagnosis and treatment of GC. This article reviews the structure and function of circRNA, summarizes the current studies on circRNA, and discusses the potential diagnostic value of circRNA in GC.

简介：AbstractSquamous cell carcinoma of the oral cavity and oropharynx have been used synonymously and interchangeably in the world literature in the context of head and neck cancers. As the 21st century progresses, divergence between the two have become more evident, particularly due to evidence related to human papillomavirus-associated oropharyngeal squamous cell carcinoma. As such, the American Joint Committee on Cancer recently published the 8th edition Cancer Staging Manual, serving as a continued global resource to clinicians and researchers. Through changes in staging related to T and N clinical and pathologic classifications, the new system is expected to influence current management guidelines of these cancers that have distinct anatomic and etiopathogenic characteristics. This article aims to review such impactful changes in a time of critical transition of the staging of head and neck cancer and how these changes may affect clinicians and researchers worldwide.

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简介：AbstractGastric cancer (GC) is one of the most common malignant tumors. The mechanism of how GC develops is vague, and therapies are inefficient. The function of microRNAs (miRNAs) in tumorigenesis has attracted the attention from many scientists. During the development of GC, miRNAs function in the regulation of different phenotypes, such as proliferation, apoptosis, invasion and metastasis, drug sensitivity and resistance, and stem-cell-like properties. MiRNAs were evaluated for use in diagnostic and prognostic predictions and exhibited considerable accuracy. Although many problems exist for the application of therapy, current studies showed the antitumor effects of miRNAs. This paper reviews recent advances in miRNA mechanisms in the development of GC and the potential use of miRNAs in the diagnosis and treatment of GC.

简介：AbstractBackground:There are an increasing number of patients with oral sensory complaints (OSCs) presenting to our dental clinic. For most dentists, it is difficult to distinguish burning mouth syndrome (BMS) from other oral mucosal diseases that may cause symptoms such as burning mouth. It is beneficial to effectively distinguish OSC patients to reduce misdiagnosis and eliminate burning symptoms as much as possible.Methods:Patients with oral burning sensations in the oral mucosal disease clinic were collected from the Peking University Hospital of Stomatology between September 1, 2014 and December 31, 2018. After excluding oral candidiasis, anemic stomatitis, dental material allergy, and other diseases from patients with oral sensory complaints, basic conditions such as gender, age, education level, job status, hyperglycemia, hypertension, hyperlipidemia, history of brain abnormalities, history of cervical spondylitis, history of thyroid disease, history of thyroid disease and insomnia were obtained. The BMS patients were compared with the control group. The t test and Chi-square test were used for statistical analysis to compare the clinical symptoms of these diseases and explore the risk factors for BMS.Results:In this case-control study, 395 patients (321 females and 74 males, mean age 55.26 ± 10.51 years) with oral sensory complaints and 391 healthy controls (281 females and 110 males, mean age 47.11 ± 13.10 years) were enrolled, among which, 8.4% (33/395) had oral candidiasis, 1.3% (5/395) had dental material allergy, 0.8% (3/395) had anemic stomatitis and 0.5% (2/395) had lichen planus. A total of 352 patients were eventually diagnosed with BMS. Anxiety and depression were more severe in BMS patients, as were the incidences of sleep disorders and brain abnormalities. Logistic regression analysis showed that age (odds ratio [OR]= 2.79, 95% confidence interval [CI]: 1.61-4.83, P < 0.001), total cholesterol level (OR= 2.92, 95% CI: 1.32-6.50, P = 0.009) and anxiety score (OR = 1.75, 95% CI: 1.01-2.77, P = 0.017) significantly increased the incidence of BMS. Patients with hyperglycemia (OR = 0.46, 95% CI: 0.23-0.89, P = 0.022), low body mass index (BMI: OR = 0.57, 95% CI: 0.34-0.93, P = 0.026) and low education level (OR = 3.43, 95% CI: 1.91-6.15, P < 0.001) were more likely to suffer from BMS.Conclusions:Oral candidiasis, anemic stomatitis, and dental material allergy with burning symptoms should be excluded from patients with BMS. It is recommended to conduct a questionnaire survey (including anxiety and depression), blood cell analysis, and salivary fungus culture for all patients with an oral burning sensation. It is necessary to conduct a patch test on patients with oral burning sensations and metal restorations.

简介：AbstractObesity has become a global health problem. Lifestyle modification and medical treatment only appear to yield short-term weight loss. Roux-en-Y gastric bypass (RYGB) is the most popular bariatric procedure, and it sustains weight reduction and results in the remission of obesity-associated comorbidities for obese individuals. However, patients who undergo this surgery may develop hypoglycemia. To date, the diagnosis is challenging and the prevalence of post-RYGB hypoglycemia (PRH) is unclear. RYGB alters the anatomy of the upper gastrointestinal tract and has a combined effect of caloric intake restriction and nutrient malabsorption. Nevertheless, the physiologic changes after RYGB are complex. Although hyperinsulinemia, incretin effects, dysfunction of β-cells and α-cells, and some other factors have been widely investigated and are reported to be possible mediators of PRH, the pathogenesis is still not completely understood. In light of the important role of the gut microbiome in metabolism, we hypothesized that the gut microbiome might also be a critical link between RYGB and hypoglycemia. In this review, we mainly highlight the current possible factors predisposing individuals to PRH, particularly related to the gut microbiota, which may yield significant insights into the intestinal regulation of glucose metabolic homeostasis and provide novel clues to improve the treatment of type 2 diabetes mellitus.

简介：AbstractGastric cancer, which has a high incidence and poor prognosis, remains a therapeutic challenge. Recently, neoadjuvant therapy has attracted increasing attention due to high recurrence rate and low survival rate after resection in most patients with advanced stage. Clinical trials show that neoadjuvant approaches confer a significant survival advantage for resectable locally advanced gastric cancer. The specific advantages of chemoradiotherapy compared with chemotherapy have not been clarified; optimal regimens and cycles, particularly in the preoperative setting, should be studied further; and trials aimed at determining the role of targeted and immunological therapies should be conducted.

简介：AbstractBackground:About 10% of patients get a surgical-site infection (SSI) after radical gastrectomy for gastric cancer, but SSI remains controversial among surgeons. The aim of this study was to explore the risk factors for SSIs after radical gastrectomy in patients with gastric cancer to guide clinical therapies and reduce the incidence of SSI.Methods:The study was a retrospective cohort study in patients who underwent radical gastrectomy for gastric cancer. SSI was defined in accordance with the National Nosocomial Infection Surveillance System. We evaluated patient-related and peri-operative variables that could be risk factors for SSIs. The Chi-squared test and logistic regression analysis were used to assess the association between these risk factors and SSI.Results:Among the 590 patients, 386 were men and 204 were women. The mean age was 56.6 (28-82) years and 14.2% (84/590) of these patients had an SSI. Among them, incisional SSI was observed in 23 patients (3.9%) and organ/space SSI in 61 patients (10.3%). Multivariate logistic regression analysis identified sex (odds ratios [ORs] = 2.548, and 95% confidence interval [CI]: 1.268-5.122, P = 0.009), total gastrectomy (OR = 2.327, 95% CI: 1.352-4.004, P = 0.002), albumin level (day 3 after surgery) <30 g/L (OR= 1.868, 95% CI: 1.066-3.274, P = 0.029), and post-operative total parenteral nutrition (OR = 2.318, 95% CI: 1.026-5.237, P = 0.043) as independent risk factors for SSI.Conclusions:SSI was common among patients after radical gastrectomy for gastric cancer. The method supporting post-operative nutrition and the duration of prophylactic antibiotics may be important modifiable influencing factors for SSI.

简介：AbstractBackground:The effects of oral contrast agents (OCAs) on dosimetry have not been studied in detail. Therefore, this study aimed to examine the influence of OCAs on dose calculation in volumetric-modulated arc therapy plans for rectal cancer.Methods:From 2008 to 2016, computed tomography (CT) images were obtained from 33 rectal cancer patients administered OCA with or without intravenous contrast agent (ICA) and 14 patients who received no contrast agent. CT numbers of organs at risk were recorded and converted to electronic densities. Volumetric-modulated arc therapy plans were designed before and after the original densities were replaced with non-enhanced densities. Doses to the planned target volume (PTV) and organs at risk were compared between the plans.Results:OCA significantly increased the mean and maximum densities of the bowels, while the effects of ICA on these parameters depended on the blood supply of the organs. With OCA, the actual doses for PTV were significantly higher than planned and doses to the bowel increased significantly although moderately. However, the increase in the volume receiving a high-range doses was substantial (the absolute change of intestine volume receiving ≥52 Gy: 1.46 [0.05-3.99, cubic centimeter range: -6.74 to 128.12], the absolute change of colon volume receiving ≥50 Gy: 0.34 [0.01-1.53 cc, range: -0.08 to 3.80 cc]. Dose changes due to ICA were insignificant. Pearson correlation showed that dose changes were significantly correlated with a high intestinal volume within or near the PTV (ρ > 0.5, P < 0.05) and with the density of enhanced intestine (ρ > 0.3, P < 0.05).Conclusions:Contrast agents applied in simulation cause underestimation of doses in actual treatment. The overdose due to ICA was slight, while that due to OCA was moderate. The bowel volume receiving ≥50Gy was dramatically increased when OCA within the bowel was absent. Physicians should be aware of these issues if the original plan is barely within clinical tolerance or if a considerable volume of enhanced intestine is within or near the PTV.

简介：AbstractBackground:Gastric cancer (GC) is one of the most globally prevalent cancers in the world. The pathogenesis of GC has not been fully elucidated, and there still lacks effective targeted therapeutics. The influence of altered kinesin superfamily protein 22 (KIF22) expression in GC progression is still unclearly. The aim of this study was to investigate the KIF22 effects on GC and related mechanisms.Methods:Gastric carcinoma tissues and matching non-cancerous tissues were collected from patients with GC who have accepted a radical gastrectomy in Lanzhou University Second Hospital from May 2013 to December 2014. The expression of KIF22 was examined in GC of 67 patients and 20 para-carcinoma tissues by immunochemical staining. The relationship between the expression of KIF22 and clinicopathologic characteristics was next investigated in the remaining 52 patients except for 15 patients who did not complete follow-up for 5 years. Cell viability was performed via 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2-H-tetrazolium bromide (MTT) test and colony formation assay in the MGC-803 and BGC-823 GC cells. Cell scratch and trans-well invasion assay was performed to assess migration ability in the MGC-803 and BGC-823 GC cells. Gene set enrichment analysis (GSEA) pathway enrichment analysis was performed to explore the potential functions. Cell cycle was detected by flow cytometry. In addition, the two GC cell lines were used to elucidate the underlying mechanism of KIF22 in GC in vitro via assessing the effects on mitogenactivated protein kinase and extracellular regulated protein kinases (MAPK/ERK) signal transduction pathway-related expressions by Western blotting assays. The differences were compared by t tests, one-way analysis of variance, and Chi-squared tests.Results:The study showed that KIF22 was up-regulated in GC, and KIF22 high expression was significantly related to differentiation degree (χ2 = 12.842, P = 0.002) and poorly overall survivals. GSEA pathway enrichment analysis showed that KIF22 was correlated with the cell cycle. Silence of KIF22 decreased the ability of the proliferation and migration in gastric cells, induced G1/S phase cell cycle arrest via regulating the MAPK-ERK pathways.Conclusions:KIF22 protein level was negatively correlated with prognosis. KIF22 knockdown might inhibit proliferation and metastasis of GC cells via the MAPK-ERK signaling pathway.

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简介：摘要目的探讨食管癌肿瘤细胞中Per2、HDAC1、E－钙黏蛋白mRNA表达及其意义。方法采用实验研究方法。体外培养人食管癌细胞系KYSE－150细胞至对数生长期设为实验组，体外培养人正常食管上皮细胞至对数生长期设为对照组。观察指标：(1)细胞增殖活力。(2)细胞迁移和侵袭能力情况。(3)初始生理状态下Per2、HDAC1、E－钙黏蛋白mRNA表达情况。(4)Per2激动剂和抑制剂处理后Per2、HDAC1、E－钙黏蛋白mRNA表达情况。(5)HDAC1抑制剂处理后Per2、E－钙黏蛋白mRNA表达情况。正态分布的计量资料以±s表示，组内比较采用t检验；组间比较采用t检验或协方差分析。结果(1)细胞增殖活力：实验组和对照组细胞增殖活力分别为0.90%±0.14%和0.52%±0.08%，两组比较，差异有统计学意义(t＝5.166，P<0.05)。(2)细胞迁移和侵袭能力情况：实验组和对照组发生迁移细胞数分别为(173±41)个和(50±15)个，两组比较，差异有统计学意义(t＝6.274，P<0.05)。实验组和对照组发生侵袭细胞数分别为(86±27)个和(21±9)个，两组比较，差异有统计学意义(t＝5.153，P<0.05)。(3)初始生理状态下Per2、HDAC1、E－钙黏蛋白mRNA表达情况：初始生理状态下，实验组细胞Per2、HDAC1、E－钙黏蛋白mRNA表达水平分别为11.7±2.7、20.4±6.6、12.4±2.5；对照组细胞上述指标分别为2.4±0.5、8.5±2.2、27.3±4.5，两组比较，差异均有统计学意义(t＝5.782，2.982，－5.034，P<0.05)。(4)Per2激动剂和抑制剂处理后Per2、HDAC1、E－钙黏蛋白mRNA表达情况：Per2激动剂处理后，实验组细胞Per2、HDAC1、E－钙黏蛋白mRNA表达水平分别为13.1±2.2、22.4±6.2、16.6±4.2；对照组细胞上述指标分别为9.9±3.1、18.4±5.6、15.3±2.3。实验组细胞Per2激动剂处理后上述指标与初始生理状态下比较，差异均无统计学意义(t＝－4.300，10.087，－4.187，P>0.05)；对照组细胞Per2激动剂处理后上述指标与初始生理状态下比较，差异均有统计学意义(t＝－4.846，3.501，9.294，P<0.05)。Per2激动剂处理后，两组细胞Per2和E－钙黏蛋白mRNA表达水平比较，差异均无统计学意义(F＝1.000，7.582，P>0.05)；两组细胞HDAC1 mRNA表达水平比较，差异有统计学意义(F＝1.724，P<0.05)。Per2抑制剂处理后，实验组细胞Per2、HDAC1、E－钙黏蛋白mRNA表达水平分别为4.1±1.7、7.5±2.2、22.8±4.2；对照组细胞上述指标分别为3.1±0.9、9.3±3.2、28.4±5.8。实验组细胞Per2抑制剂处理后上述指标与初始生理状态下比较，差异均有统计学意义(t＝12.124，5.105，－10.245，P<0.05)；对照组细胞Per2抑制剂处理后上述指标与初始生理状态下比较，差异均无统计学意义(t＝－2.815，1.568，－1.439，P>0.05)。Per2抑制剂处理后，两组细胞Per2和E－钙黏蛋白mRNA表达水平比较，差异均有统计学意义(F＝22.965，82.134，P<0.05)；两组细胞HDAC1 mRNA表达水平比较，差异无统计学意义(F＝6.416，P>0.05)。(5)HDAC1抑制剂处理后Per2、E－钙黏蛋白mRNA表达情况：HDAC1抑制剂处理后，实验组细胞Per2、E－钙黏蛋白mRNA表达水平分别为13.4±3.5、24.2±3.4，对照组细胞上述指标分别为3.1±1.2、26.8±5.2。实验组细胞HDAC1抑制剂处理后Per2 mRNA表达水平与初始生理状态下比较，差异无统计学意义(t＝－3.959，P>0.05)；E－钙黏蛋白mRNA表达水平与初始生理状态下比较，差异有统计学意义(t＝－21.977，P<0.05)。对照组细胞HDAC1抑制剂处理后Per2、E－钙黏蛋白mRNA表达水平与初始生理状态下比较，差异均无统计学意义(t＝－1.440、1.058，P>0.05)。HDAC1抑制剂处理后，两组细胞Per2 mRNA表达水平比较，差异无统计学意义(F＝2.004，P>0.05)，E－钙黏蛋白mRNA表达水平比较，差异有统计学意义(F＝325.800，P<0.05)。结论食管肿瘤细胞中Per2和HDAC1 mRNA表达水平升高，E－钙黏蛋白mRNA表达水平降低。Per2 mRNA高表达可能会激活下游靶向蛋白HDAC1的表达升高，抑制细胞表面E－钙黏蛋白mRNA表达水平。

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简介：AbstractBackground:Gastric cancer (GC) is one of the most common malignancies, and intestinal-type GC is the main histopathologic type of GC in China. We previously reported that casein kinase 2 interacting protein 1 (CKIP-1) acts as a candidate tumor suppressor in intestinal-type GC. CKIP-1 participates in the regulation of multiple signaling pathways, including the Wnt/β-catenin pathway, of which caudal-related homeobox 1 (CDX1) may be a downstream target gene. The purpose of this study was to investigate the relationship between CKIP-1 and CDX1 in intestinal-type GC.Methods:Sixty-seven gastroscopy biopsy specimens and surgically resected gastric specimens were divided into four groups: gastric mucosa group, intestinal metaplasia (IM) group, dysplasia group, and intestinal-type GC group. The expression levels of CKIP-1 and CDX1 were detected in these groups and GC cell lines, and the correlations between these expression levels were analyzed. SGC7901 and BGC823 cells were divided into CKIP-1 shRNA groups and CKIP-1 over-expression groups, and CDX1 expression was detected. β-Catenin expression was detected in intestinal-type GC tissue samples and CKIP-1 shRNA and CKIP-1 over-expression SGC7901 cells, and its correlation with CKIP-1 expression in intestinal-type GC tissue was analyzed. The Wnt/β-catenin pathway inhibitor DKK-1 and activator LiCl were incubated with SGC7901 cells, BGC823 cells, and CKIP-1 shRNA and CKIP-1 over-expression SGC7901 and BGC823 cells, following which CDX1 and Ki-67 expression were detected.Results:The expression levels of CKIP-1 and CDX1 were lower in patients with intestinal-type GC than in patients with IM and dysplasia (both P < 0.05). CKIP-1 and CDX1 expression levels were positively correlated in IM, dysplasia, and intestinal-type GC tissue and cell lines (r = 0.771, P < 0.01; r = 0.597, P < 0.01; r = 0.654, P < 0.01; r = 0.811, P < 0.01, respectively). CDX1 expression was decreased in the CKIP-1 shRNA groups and increased in the CKIP-1 over-expression groups of SGC7901 and BGC823 cells compared to that in the corresponding control groups (both P < 0.05). CKIP-1 expression was negatively correlated with β-catenin expression in intestinal-type GC patients (r = -0.458, P < 0.01). Compared to the control group, β-catenin expression was increased in the CKIP-1 shRNA SGC7901 cell group and decreased in the CKIP-1 over-expression SGC7901 cell group (P < 0.05). CDX1 expression was increased in SGC7901 and BGC823 cells treated with DKK-1, DKK-1 increased CDX1 expression and decreased Ki-67 expression in the CKIP-1 shRNA group; the opposite result was observed in SGC7901 and BGC823 cells treated with LiCl, and LiCl decreased CDX1 expression and increased Ki-67 expression in the CKIP-1 over-expression group (both P < 0.05).Conclusions:Through the Wnt/β-catenin signaling pathway, CKIP-1 may positively regulate CDX1 in intestinal-type GC.

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简介：AbstractBackground:Helicobacter pylori (HP) has been considered to be one of the primary causes of gastric mucosa-associated lymphoid tissue (MALT) lymphoma since 1993. Low-grade gastric MALT lymphoma with HP is widely treated with HP eradication therapy, according to each specific clinical situation. However, several studies and guidelines indicate that the modified HP eradication therapy is also valid for HP-negative gastric MALT lymphoma. The aim of this study was to perform a meta-analysis of the clinical efficacy of the modified HP eradication therapy for gastric MALT lymphoma without HP.Methods:We searched studies that reported the response rate of the modified HP eradication therapy regimen for gastric MALT lymphoma without HP by using PubMed, Medline, and Ebsco from January 1971 until February 2019. All statistical analyses were carried out using R 3.5.3 (Mathsoft Company, Cambridge, MA, USA). The pooled response rate was expressed as a decimal. The heterogeneity test was performed using the I-squared (I2) statistic.Results:A total of 14 studies were selected with a total of 148 patients with HP-negative gastric MALT lymphoma. The overall pooled response rate was 0.38 (95% confidence interval [CI]: 0.29-0.47). The combined estimate is I2 = 57% (P < 0.01). The study subjects were categorized by factors (area of patients). The pooled response rate of the sub-groups (Korea, Japan, China, and Western countries) was 0.63 (95% CI: 0.50-0.76), 0.16 (95% CI: 0.05-0.30), 0.38 (95% CI: 0.20-0.55), and 0.57 (95% CI: 0.08-1.00). The response rate showed that the modified HP eradication therapy was effective for patients with HP-negative gastric MALT lymphoma, especially in Korea and Western countries.Conclusion:Therefore, the modified HP eradication therapy can be considered an optional therapy for patients with low-grade HP-negative gastric MALT lymphoma. However, several limitations were revealed in the meta-analysis. Further systematic reviews and research are required.