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Colonic expression of the peptide transporter PEPT1 is downregulated during intestinal inflammation and is not required for NOD2-dependent immune activation.

BACKGROUND: PEPT1 was proposed to be expressed only in inflamed colonic tissues in which it could contribute to inflammatory bowel disease (IBD) development by transporting bacterial peptides, such as muramyl dipeptide (MDP), that activate intracellular pattern recognition receptors, such as the nucleotide-binding and oligomerization domain 2. To better define the pathological relevance of this transporter, we analyzed PEPT1 expression during intestinal inflammation and studied the susceptibility of Pept1-deficient (Pept1) mice to experimental colitis. METHODS: Wild-type and Pept1 mice were t

Mesenchymal stem cells alleviate TNBS-induced colitis by modulating inflammatory and autoimmune responses.

AIM: To investigate the potential therapeutic effects of mesenchymal stem cells (MSCs) in inflammatory bowel disease (IBD), we transplanted MSCs into an experimental model of IBD. METHODS: A rectal enema of trinitrobenzene sulfonic acid (TNBS) (100 mg/kg body weight) was administered to female BALB/c mice. Bone marrow mesenchymal stem cells (BMSCs) were derived from male green fluorescent protein (GFP) transgenic mice and were transplanted intravenously into the experimental animals after disease onset. Clinical activity scores and histological changes were evaluated. GFP and Sex determining

Molecular and behavioral changes in nociception in a novel rat model of chronic pancreatitis for the study of pain.

The approach to the management of painful chronic pancreatitis has been empirical, primarily due to the lack of information about biological mechanisms producing pain. To facilitate research into pain mechanisms, our aim was to assess a rat model of chronic pancreatitis induced by pancreatic infusion of trinitrobenzene sulfonic acid as a model of painful pancreatitis. Nociception was assessed by measuring mechanical sensitivity of the abdomen and by recording the number of nocifensive behaviors in response to electrical stimulation of the pancreas. Expression of neuropeptides calcitonin gene-r

Noninflammatory upregulation of nerve growth factor underlies gastric hypersensitivity induced by neonatal colon inflammation.

Gastric hypersensitivity is one of the key contributors to the postprandial symptoms of epigastric pain/discomfort, satiety, and fullness in functional dyspepsia patients. Epidemiological studies found that adverse early-life experiences are risk factors for the development of gastric hypersensitivity. Preclinical studies found that neonatal colon inflammation elevates plasma norepinephrine (NE), which upregulates expression of nerve growth factor (NGF) in the muscularis externa of the gastric fundus. Our goal was to investigate the cellular mechanisms by which NE upregulates the expression of

Adrenergic signaling mediates mechanical hyperalgesia through activation of P2X3 receptors in primary sensory neurons of rats with chronic pancreatitis.

The mechanism of pain in chronic pancreatitis (CP) is poorly understood. The aim of this study was designed to investigate roles of norepinephrine (NE) and P2X receptor (P2XR) signaling pathway in the pathogenesis of hyperalgesia in a rat model of CP. CP was induced in male adult rats by intraductal injection of trinitrobenzene sulfonic acid (TNBS). Mechanical hyperalgesia was assessed by referred somatic behaviors to mechanical stimulation of rat abdomen. P2XR-mediated responses of pancreatic dorsal root ganglion (DRG) neurons were measured utilizing calcium imaging and whole cell patch-clamp

The ion channel TRPA1 is required for normal mechanosensation and is modulated by algesic stimuli.

BACKGROUND & AIMS: The transient receptor potential (TRP) channel family includes transducers of mechanical and chemical stimuli for visceral sensory neurons. TRP ankyrin 1 (TRPA1) is implicated in inflammatory pain; it interacts with G-protein-coupled receptors, but little is known about its role in the gastrointestinal (GI) tract. Sensory information from the GI tract is conducted via 5 afferent subtypes along 3 pathways. METHODS: Nodose and dorsal root ganglia whose neurons innnervate 3 different regions of the GI tract were analyzed from wild-type and TRPA1(-/-) mice using quantitative re

Pattern of cytokine and adhesion molecule mRNA in hapten-induced relapsing colon inflammation in the rat.

We examined the mRNA expression of cytokines, chemokines, integrins, and selectins in colon lesions of rat colitis with a semi-quantitative RT-PCR assay. Rat colitis was induced by trinitrobenzene sulfonic acid (TNBS) in 50% ethanol. Within 24 h, an acute inflammation occurred with hyperemia, edema, necrosis and an intense infiltration of granulocytes in the mucosa. The lesion proceeded into a T-lymphocyte/monocyte-driven chronic inflammation for two weeks and healed in 6 weeks. An acute inflammation recurred at the same site when the recovered animals were systemically injected with TNBS. We

Indigo Naturalis ameliorates murine dextran sodium sulfate-induced colitis via aryl hydrocarbon receptor activation.

BACKGROUND: Indigo Naturalis (IN) is used as a traditional herbal medicine for ulcerative colitis (UC). However, the mechanisms of action of IN have not been clarified. We aimed to evaluate the efficacy of IN for ameliorating colonic inflammation. We further investigated the mechanisms of action of IN. METHODS: Colitis severity was assessed in dextran sodium sulfate-induced colitis and trinitrobenzene sulfonic acid-induced colitis models with or without the oral administration of IN or indigo, which is a known major component of IN. Colonic lamina propria (LP) mononuclear cells isolated from

Moxibustion eases chronic inflammatory visceral pain through regulating MEK, ERK and CREB in rats.

AIM: To investigate the effects of herb-partitioned moxibustion (HPM) on phosphorylation of mitogen-activated extracellular signal-regulated kinase (MEK)1, extracellular signal-regulated kinase (ERK)1/2 and cAMP response element binding protein (CREB) in spinal cord of rats with chronic inflammatory visceral pain (CIVP), and to explore the central mechanism of HPM in treating CIVP. METHODS: Male Sprague-Dawley rats were randomized into normal, model, HPM, sham-HPM, MEK-inhibitor and dimethyl sulfoxide (DMSO) groups. The CIVP model was established using an enema mixture of trinitrobenzene sulf

Colitogenic role of tumour necrosis factor (TNF) receptors in trinitrobenzene sulphonic acid colitis: TNF-R1 ablation does not affect systemic inflammatory response.

Tumour necrosis factor (TNF)-α plays a critical role in the pathogenesis of T helper type 1-mediated colitis such as Crohn's disease. However, the roles of its two receptors in mediating pathology remain largely unknown. In this study, trinitrobenzene sulphonic acid (TNBS) was used to induce colitis in TNF-receptor single or double knock-out (DKO) BALB/c mice and in wild-type counterparts. TNF-R1(-/-) mice had significantly less weight loss, reduced mortality, colon shortening and oedema, colon histological damage and lower levels of colon myeloperoxidase compared with wild-type (WT) BALB/c mi

Bioactivities and Mechanisms of Action of Sinomenine and Its Derivatives: A Comprehensive Review.

Sinomenine, an isoquinoline alkaloid extracted from the roots and stems of Sinomenium acutum, has been extensively studied for its derivatives as bioactive agents. This review concentrates on the research advancements in the biological activities and action mechanisms of sinomenine-related compounds until November 2023. The findings indicate a broad spectrum of pharmacological effects, including antitumor, anti-inflammation, neuroprotection, and immunosuppressive properties. These compounds are notably effective against breast, lung, liver, and prostate cancers, exhibiting IC50 values of appro

A comprehensive review on pain: Model, target, therapy, and prospect (Review).

Pain serves as both a protective physiological response essential for species survival and a global health issue affecting human well‑being and societal development. The present review systematically summarized and analyzed the research progresses on pain through a multidimensional analytical framework encompassing animal models, molecular targets, therapeutic approaches and future prospects. In animal modeling, neuropathic pain paradigms have evolved from traditional mechanical compression to composite models that combine dynamic displacement and chemical stimulation. Cancer‑induced pain mode

Совпадение в полном тексте источника
… DBTC, dibutyltin dichloride; IBS, irritable bowel syndrome; SD, Sprague Dawley; TNBS, 2,4,6-Trinitrobenzenesulfonic acid. Authors, year | Type | Animal | Method | Time | Indicators | Advantages | Disadvantages | (Refs.) … In ulcerative colitis model, dextran sulfate sodium (DSS) drinking ad libitum or 2,4,6-trinitrobenzenesulfonic acid (TNBS)/ethanol rectal administration induced bloody stools and mucosal damage, with TNBS offering superior reproducibility despite interindividual DSS intake variability ( 85 - 87 ). …

Роли глюкагонового пептида 1 Агонисты-рецепторы в биологии иммунных клеток и аутоиммунных/аутоинфлампмидативных заболеваниях.

Глукагон-подобный peptide-1 (В тыс.GLP-1) — гормон, полученный кишечником, необходимый для поддержания глюкозы гомеостаза через многочисленные физиологические пути: инсулина, ингибирующего секрецию глюкагонов, замедляющего опустошение желудочков, усиливающего чувство полноты и подавляющего аппетит. С тех пор GLP-1 может разлагаться при помощи дипептидила пептидаза 4, GLP-1 рецепторные агонисты (GLP-1RAs) были разработаны для решения этой проблемы деградации. В настоящее время GLP-1RAs стали высокоэффективными методами лечения для управления типом 2 сахарный диабет и ожирение. Помимо их хорошо

Совпадение в полном тексте источника
… Moreover, a recent investigation employed a murine model of colitis that was triggered by 2,4,6-trinitrobenzenesulfonic acid (TNBS) and found that disturbances in glucose levels were correlated with GLP-1 levels. …

Glucocorticoids-based prodrug design: Current strategies and research progress.

Attributing to their broad pharmacological effects encompassing anti-inflammation, antitoxin, and immunosuppression, glucocorticoids (GCs) are extensively utilized in the clinic for the treatment of diverse diseases such as lupus erythematosus, nephritis, arthritis, ulcerative colitis, asthma, keratitis, macular edema, and leukemia. However, long-term use often causes undesirable side effects, including metabolic disorders-induced Cushing's syndrome (buffalo back, full moon face, hyperglycemia, etc.), osteoporosis, aggravated infection, psychosis, glaucoma, and cataract. These notorious side e

Совпадение в полном тексте источника
… TNBS: Trinitrobenzenesulfonic acid. Prodrug name | Carrier | Linker | Route of administration | Applications and Advantages | Ref. …

Immunomodulatory Nanosystems.

Immunotherapy has emerged as an effective strategy for the prevention and treatment of a variety of diseases, including cancer, infectious diseases, inflammatory diseases, and autoimmune diseases. Immunomodulatory nanosystems can readily improve the therapeutic effects and simultaneously overcome many obstacles facing the treatment method, such as inadequate immune stimulation, off-target side effects, and bioactivity loss of immune agents during circulation. In recent years, researchers have continuously developed nanomaterials with new structures, properties, and functions. This Review provi

Colorectal Cancer at the Crossroads: The Good, the Bad, and the Future of Platinum-Based Drugs.

Colorectal cancer (CRC) remains a significant global health challenge, ranking third in incidence and second in mortality among cancers worldwide. This review addresses the complex landscape of CRC, focusing on incidence, mortality trends, preventive strategies, and the evolving therapeutic approaches, particularly highlighting the role of platinum-based drugs like oxaliplatin (OXP). It also underscores the increasing burden of CRC, with factors such as westernized diets, aging populations, and genetic predispositions contributing to its prevalence. Therapeutically, early detection greatly enh

Disorders of the Gastrointestinal System

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Неделя ГЭЭ 2017 Презентации на плакате

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UEG Week 2015 Poster Presentations

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Неделя ГЭЭ 2018 Презентации на плакате

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