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https://www.readbyqxmd.com/read/29456060/association-of-tnf-%C3%AE-but-not-il-1%C3%AE-levels-with-the-presence-of-helicobacter-pylori-infection-increased-the-risk-of-peptic-ulcer-development
#1
Mehdi Tourani, Maryam Habibzadeh, Ahmad Karkhah, Javad Shokri-Shirvani, Ladan Barari, Hamid Reza Nouri
Peptic ulcer is a lesion in the mucosa of the digestive tract affecting many people all around the world. Recent investigations have indicated that produced inflammatory cytokines such as TNF-α and IL-1β in response to gastric infection by Helicobacter pylori play an important role in the development of peptic ulcer. With regard to the significance of these cytokines in peptic ulcer development and the high prevalence of this disease in the developing countries, this study aimed to investigate the association of TNF-α and IL-1β with peptic ulcer in the presence of H...
February 15, 2018: Cytokine
https://www.readbyqxmd.com/read/29453320/methylation-of-the-hoxa10-promoter-directs-mir-196b-5p-dependent-cell-proliferation-and-invasion-of-gastric-cancer-cells
#2
Linlin Shao, Zheng Chen, Dunfa Peng, Mohammed Soutto, Shoumin Zhu, Andreia Bates, Shutian Zhang, Wael El-Rifai
The cross-talk between epigenetics and miRNA expression plays an important role in human tumorigenesis. Herein, we investigated the regulation and role of miR-196b-5p in gastric cancer. Using quantitative real-time RT-PCR, we demonstrate that miR-196b-5p is significantly overexpressed in human gastric cancer tissues (P<0.01). In addition, we also found that HOXA10, the host gene for miR-196b-5p, is overexpressed and positively correlated with miR-196b-5p expression levels (P<0.001). Quantitative pyrosequencing methylation analysis of HOXA10 promoter, demonstrated significantly lower levels of promoter DNA methylation of HOXA10 in gastric cancer samples, as compared to normal gastric mucosa samples (non-tumor control)...
February 16, 2018: Molecular Cancer Research: MCR
https://www.readbyqxmd.com/read/29453165/endoscopic-submucosal-dissection-for-the-diagnosis-and-therapy-of-pedunculated-gastric-cancer-with-prolapse-into-the-duodenal-bulb-a-case-report
#3
Norihiko Suzuki, Masashi Yoshida, Hironori Ohdaira, Tomonori Imakita, Nobuhiro Tsutsui, Yasunobu Kobayashi, Junji Takahashi, Shinya Okada, Masaki Kitajima, Yutaka Suzuki
INTRODUCTION: Preoperative diagnosis of gastric cancer invasion is not always sufficiently accurate. Diagnostic endoscopic submucosal dissection (ESD) can be performed for the purpose of accurate decision making and to avoid partial treatment vs aggressive over-treatment. We present a patient with the gastric cancer with indeterminate pre-operative diagnosis for depth of the invasion. CASE PRESENTATION: A 70-year-old man presented at our hospital because both anti-Helicobacter pylori (Hp) IGG antibody and serum pepsinogen (PG) levels were classified as positive...
February 9, 2018: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/29452667/overview-on-the-management-of-non-gastric-malt-lymphomas
#4
REVIEW
Irene Defrancesco, Luca Arcaini
Extranodal marginal zone B-cell lymphomas (EMZLs) of the mucosa-associated lymphoid tissue (MALT) are indolent lymphomas which can present at any extranodal site. The most frequent localizations (other than stomach) are ocular adnexa, salivary gland, skin, lung and thyroid. Chronic inflammation and antigenic stimulation are a potential risk for the development of MALT lymphomas. While Helicobacter Pylori (HP) is known to be associated with gastric MALT lymphoma and antibiotic therapy is effective in the setting of HP-positive, other microorganisms (such as Chlamydophila Psittaci, Campylobacter Jejiuni, Borrelia Burgdoferi) have been implicated in the pathogenesis of non-gastric MALT lymphomas...
March 2018: Best Practice & Research. Clinical Haematology
https://www.readbyqxmd.com/read/29451983/reinforcing-mucus-barrier-properties-with-low-molar-mass-chitosans
#5
Sujit Kootala, Luimar Filho, Vaibhav Srivastava, Victoria Linderberg, Amani Moussa, Laurent David, Stéphane Trombotto, Thomas Crouzier
The mucus gel covers the wet epithelia that forms the inner lining of the body. It constitutes our first line of defense protecting the body from infections and other deleterious molecules. Failure of the mucus barrier can lead to the inflammation of the mucosa such as in inflammatory bowel diseases. Unfortunately, there are no effective strategies that reinforce the mucus barrier properties to recover or enhance its ability to protect the epithelium. Herein, we describe a mucus engineering approach that addresses this issue where we physically crosslink the mucus gel with low molar mass chitosan variants to reinforce its barrier functions...
February 16, 2018: Biomacromolecules
https://www.readbyqxmd.com/read/29449092/efficacy-of-narrow-band-imaging-for-detecting-intestinal-metaplasia-in-adult-patients-with-symptoms-of-dyspepsia
#6
S Sobrino-Cossío, J M Abdo Francis, F Emura, E S Galvis-García, M L Márquez Rocha, G Mateos-Pérez, C B González-Sánchez, N Uedo
INTRODUCTION AND OBJECTIVE: Atrophy and intestinal metaplasia are early phenotypic markers in gastric carcinogenesis. White light endoscopy does not allow direct biopsy of intestinal metaplasia due to a lack of contrast of the mucosa. Narrow-band imaging is known to enhance the visibility of intestinal metaplasia, to reduce sampling error, and to increase the diagnostic yield of endoscopy for intestinal metaplasia in Asian patients. The aim of our study was to validate the diagnostic performance of narrow-band imaging using 1...
February 12, 2018: Revista de Gastroenterología de México
https://www.readbyqxmd.com/read/29446034/molecular-genetic-diversity-of-gongylonema-neoplasticum-fibiger-ditlevsen-1914-spirurida-gongylonematidae-from-rodents-in-southeast-asia
#7
Aogu Setsuda, Alexis Ribas, Kittipong Chaisiri, Serge Morand, Monidarin Chou, Fidelino Malbas, Muchammad Yunus, Hiroshi Sato
More than a dozen Gongylonema spp. (Spirurida: Spiruroidea: Gongylonematidae) have been described from a variety of rodent hosts worldwide. Gongylonema neoplasticum (Fibiger & Ditlevsen, 1914), which dwells in the gastric mucosa of rats such as Rattus norvegicus (Berkenhout) and Rattus rattus (Linnaeus), is currently regarded as a cosmopolitan nematode in accordance with global dispersion of its definitive hosts beyond Asia. To facilitate the reliable specific differentiation of local rodent Gongylonema spp...
February 14, 2018: Systematic Parasitology
https://www.readbyqxmd.com/read/29444465/simultaneous-detection-of-human-cyp2c19-polymorphisms-and-antibiotic-resistance-of-helicobacter-pylori-using-a-personalized-diagnosis-kit
#8
Jun Zhang, Jing Zhong, Jian Ding, Jiemin Shi, Tao Tang, Qiqi Liu, Huilian Huang, Licheng Dai, Ningmin Yang
OBJECTIVES: We evaluated a personalized diagnosis kit for Helicobacter pylori that employs visual gene chip technology for the simultaneous detection of CYP2C19 polymorphisms, and clarithromycin/levofloxacin antibiotic resistance. METHODS: H. pylori isolates from the gastric antrum mucosa of 394 patients were tested using the kit. DNA sequencing and antibiotic susceptibility testing were also performed. RESULTS: In total, 267/394 (67.77%) specimens were positive for H...
February 11, 2018: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/29444284/gentamicin-intercalated-smectite-as-a-new-therapeutic-option-for-helicobacter-pylori-eradication
#9
Su Jin Jeong, Jie-Hyun Kim, Da Hyun Jung, Kyoung Hwa Lee, Soon Young Park, Yungoo Song, Il-Mo Kang, Young Goo Song
Objectives: Novel antibacterial strategies against Helicobacter pylori are needed because H. pylori strains are acquiring resistance to antibiotics. We evaluated the efficacy of gentamicin-intercalated smectite hybrid (S-GEN)-based treatment regimens in a murine model of H. pylori infection. Methods: Two groups of 10 rats were administered either smectite or S-GEN to measure coverage of the gastric mucosa. To evaluate anti-H. pylori efficacy, mice were divided into eight groups of 10 mice each given different treatments, and H...
February 12, 2018: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/29443099/detection-of-a-cdh1-rare-transcript-variant-in-fresh-frozen-gastric-cancer-tissues-by-chip-based-digital-pcr
#10
Chiara Molinari, Raefa Abou Khouzam, Samanta Salvi, Tania Rossi, Guglielmina Nadia Ranzani, Daniele Calistri
CDH1a, a non-canonical transcript of the CDH1 gene, has been found to be expressed in some gastric cancer (GC) cell lines, whereas it is absent in normal gastric mucosa. Recently, we detected CDH1a transcript variant in fresh-frozen tumor tissues obtained from patients with GC. The expression of this variant in tissue samples was investigated by the chip-based digital PCR (dPCR) approach presented here. dPCR offers the potential for an accurate, robust, and highly sensitive measurement of nucleic acids and is increasingly utilized for many applications in different fields...
February 5, 2018: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29439278/delineation-of-the-extent-of-early-gastric-cancer-by-magnifying-narrow-band-imaging-and-chromoendoscopy-a-multicenter-randomized-controlled-trial
#11
Takashi Nagahama, Kenshi Yao, Noriya Uedo, Hisashi Doyama, Tetsuya Ueo, Kunihisa Uchita, Hideki Ishikawa, Takashi Kanesaka, Yasuhito Takeda, Kurato Wada, Kentaro Imamura, Hisatomi Arima, Toshio Shimokawa
BACKGROUND: Accurate delineation of tumor margins is necessary for curative resection of early gastric cancer (EGC). The objective of this multicenter, randomized, controlled study was to compare the accuracy with which magnifying narrow-band imaging (M-NBI) and indigo carmine chromoendoscopy delineate EGC margins. METHODS: Patients with EGC ≥ 10 mm undergoing endoscopic or surgical resection were enrolled. The oral-side margins of the lesions were first evaluated with conventional white-light endoscopy in both groups and then delineated by either chromoendoscopy or M-NBI...
February 13, 2018: Endoscopy
https://www.readbyqxmd.com/read/29438840/efficacy-and-safety-of-combined-low-doses-of-either-diclofenac-or-celecoxib-with-gabapentin-versus-their-single-high-dose-in-treatment-of-neuropathic-pain-in-rats
#12
Mohamed A Ibrahim, Walaa Yehia Abdelzaher, Remon R Rofaeil, Soha Abdelwahab
Neuropathic pain is a worldwide health problem with no consensus regarding its optimal therapy. This study compared the analgesic effect and gastric, hepatic, and renal safety of combined low doses of diclofenac and celecoxib with gabapentin versus their individual high doses in the treatment of neuropathic pain in rats. Left sciatic nerve ligation was used as neuropathic pain model. Rats were allocated into 7 groups (7 rats for each): sham control; model group (received vehicle); Gaba-group (received gabapentin (100 mg/kg /day); Diclo 10-group (received diclofenac (10 mg/kg); Cele 10-group (received celecoxib (10 mg/kg/day); Gaba + Diclo 5 (receivedgabapentin(100 mg/kg /day) plus diclofenac (5 mg/kg); Gaba + Cele 5 (received gabapentin (100 mg/kg/day) plus celecoxib (5 mg/kg))...
February 10, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29434845/all-trans-retinoic-acid-inhibits-the-proliferation-of-sgc7901-cells-by-regulating-caveolin-1-localization-via-the-erk-mapk-signaling-pathway
#13
Sumei Zhang, Rui Shi, Shaolong Chen, Xiang Wei, Qing Zhou, Yuan Wang
Caveolin-1 is a scaffold protein of caveolae in the mucosa of the gastrointestinal tract and acts as a tumor modulator by interacting with cell adhesion molecules and signaling receptors. Caveolin-1 stabilizes cell-cell and cell-matrix contacts and is a hallmark of a number of different types of human cancer, including gastric cancer. All-trans retinoic acid (ATRA), a derivative of vitamin A, has been demonstrated to exhibit tumor inhibitory effects in acute leukemia and certain types of solid tumor. In the present study, treatment with ATRA was demonstrated to inhibit the proliferation of gastric cancer cell line SGC7901, in a time- and dose-dependent manner...
February 2018: Oncology Letters
https://www.readbyqxmd.com/read/29434796/adam-proteases-involved-in-inflammation-are-differentially-altered-in-patients-with-gastritis-or-ulcer
#14
Nuray Erin, Sema Türker, Özlem Elpek, Bülent Yildirim
ADAM metallopeptidase domain (ADAM)9, 10 and 17 have α-secretase activity that regulates ectodomain shedding of factors involved in inflammation, cell proliferation, angiogenesis, and wound healing. The secretase activity of ADAM proteins is known to induce an inflammatory response. However, under certain conditions, a lack of secretase activity may induce inflammation suggesting differential roles of ADAM proteins with secretase activity. To the best of our knowledge, the present study evaluated the changes in α-secretase activity and expression of associated ADAM proteases (ADAM9, 10 and 17) in the gastric mucosa of patients with gastritis and ulcers, for the first time...
February 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29434677/the-constitutively-active-pkg-ii-mutant-effectively-inhibits-gastric-cancer-development-via-a-blockade-of-egf-egfr-associated-signalling-cascades
#15
Yan Wu, Miaomiao Yuan, Wenbin Su, Miaolin Zhu, Xiaoyuan Yao, Ying Wang, Hai Qian, Lu Jiang, Yan Tao, Min Wu, Ji Pang, Yongchang Chen
Type II cyclic guanosine monophosphate (cGMP)-dependent protein kinase (PKG II) is a membrane-anchored enzyme expressed mainly in the intestinal mucosa and the brain, and is associated with various physiological or pathological processes. Upregulation of PKG II is known to induce apoptosis and inhibit proliferation and metastasis of cancer cells. The inhibitory effect of PKG II has been shown to be dependent on the inhibition of the activation of epidermal growth factor receptor (EGFR) and blockade of EGFR downstream signal transduction in vitro...
2018: Therapeutic Advances in Medical Oncology
https://www.readbyqxmd.com/read/29434495/carcinosarcoma-of-stomach-confined-to-the-mucosa
#16
Hirohiko Kuroda, Hiroaki Saito, Yusuke Kono, Yuki Murakami, Yuji Shishido, Tomoyuki Matsunaga, Yoji Fukumoto, Tomohiro Osaki, Keigo Ashida, Kanae Nosaka, Yoshihisa Umekita, Yoshiyuki Fujiwara
Carcinosarcoma is a malignant tumor composed of both epithelial and mesenchymal malignant tumor components. A 78-year-old man was transferred to our hospital because of hematemesis and tarry stool. An emergency gastrointestinal endoscopic examination revealed active bleeding from an ulcerative lesion on the posterior wall of the gastric body; endoscopic hemostasis was successfully performed. A gastrointestinal endoscopy performed two months later showed a polypoid lesion at the same place where the ulcer had been...
December 2017: Yonago Acta Medica
https://www.readbyqxmd.com/read/29428955/clinicopathological-features-and-magnifying-chromoendoscopic-findings-of-non-ampullary-duodenal-epithelial-tumors
#17
Yosuke Toya, Masaki Endo, Risaburo Akasaka, Jun Urushikubo, Takahiro Gonai, Kensuke Asakura, Shunichi Yanai, Keisuke Kawasaki, Makoto Eizuka, Noriyuki Uesugi, Shotaro Nakamura, Tamotsu Sugai, Takayuki Matsumoto
BACKGROUND AND AIMS: We aimed to investigate an association between clinicopathological features, including immunohistochemical mucin phenotypes, and magnifying chromoendoscopic findings with crystal violet staining (ME-CV) in non-ampullary duodenal epithelial tumors (NADETs). METHODS: A total of 55 patients with NADET were divided into 3 groups by mucin phenotype: intestinal, gastrointestinal, or gastric. ME-CV findings were classified into 4 patterns: convoluted, leaf-like, reticular/sulciolar, and pinecone...
February 9, 2018: Digestion
https://www.readbyqxmd.com/read/29428952/transient-receptor-potential-ankyrin-1-and-substance-p-mediate-the-development-of-gastric-mucosal-lesions-in-a-water-immersion-restraint-stress-rat-model
#18
Yan Xu, Ji Jia, Chuangbo Xie, Youping Wu, Weifeng Tu
BACKGROUND: Activation of substance P (SP) contributes to the development and maintenance of gastric lesions, but the mechanisms underlying the release of SP and SP-mediated damage to the gastric mucosa remain unknown. Transient receptor potential ankyrin 1 (TRPA1) is expressed in SP-positive neurons in the dorsal root ganglion (DRG) and stomach of rats. We hypothesized that water immersion restraint stress (WIRS) may activate and sensitize TRPA1 in DRG neurons, subsequently inducing the release of SP from DRG and stomach cells, causing the development of acute gastric mucosal lesions (AGML)...
February 9, 2018: Digestion
https://www.readbyqxmd.com/read/29427515/injury-repair-inflammation-and-metaplasia-in-the-stomach
#19
Anne R Meyer, James R Goldenring
The development of intestinal-type gastric cancer is preceded by the emergence of metaplastic cell lineages in the gastric mucosa. In particular, intestinal metaplasia and spasmolytic polypeptide-expressing metaplasia (SPEM) have been associated with the pathological progression to intestinal-type gastric cancer. The development of SPEM represents a physiological response to damage that recruits reparative cells to sites of mucosal injury. Metaplastic cell lineages are characterized by mucus secretion, adding a protective barrier to the epithelium...
February 10, 2018: Journal of Physiology
https://www.readbyqxmd.com/read/29427040/novel-epigenetic-markers-for-gastric-cancer-risk-stratification-in-individuals-after-helicobacter-pylori-eradication
#20
Masahiro Maeda, Satoshi Yamashita, Taichi Shimazu, Naoko Iida, Hideyuki Takeshima, Takeshi Nakajima, Ichiro Oda, Sohachi Nanjo, Chika Kusano, Akiko Mori, Hiroshi Moro, Harumi Yamada, Shoichiro Tsugane, Toshiro Sugiyama, Yoshiharu Sakai, Toshikazu Ushijima
BACKGROUND: The risk stratification of healthy individuals after Helicobacter pylori eradication is an urgent issue. The assessment of aberrant DNA methylation accumulated in gastric tissues with normal appearance, which can reflect overall epigenomic damage, is a promising strategy. We aimed to establish novel epigenetic cancer risk markers for H. pylori-eradicated individuals. METHODS: Gastric mucosa was collected from eight healthy volunteers without H. pylori infection (G1), 75 healthy individuals with gastric atrophy (G2), and 94 gastric cancer patients (G3) after H...
February 9, 2018: Gastric Cancer
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