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Gastrointestinal hormone

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https://www.readbyqxmd.com/read/29325757/the-role-of-fatty-acids-and-their-endocannabinoid-like-derivatives-in-the-molecular-regulation-of-appetite
#1
REVIEW
Renger F Witkamp
Intake, absorption and synthesis of fatty acids, including those produced by the intestinal microbiota are tightly monitored via specific receptors and, indirectly through their conversion into a variety of signalling molecules. The resulting information is integrated and translated to different physiological processes, including the regulation of appetite and satiation. Direct chemosensing of fatty acids takes place via interaction with free fatty acid (FFA) and other receptors. These are present in the oronasal cavity and along the entire gastrointestinal tract, in various other tissues, and, for some receptors also in brain...
January 8, 2018: Molecular Aspects of Medicine
https://www.readbyqxmd.com/read/29317252/flavonoids-and-the-gastrointestinal-tract-local-and-systemic-effects
#2
REVIEW
P I Oteiza, C G Fraga, D A Mills, D H Taft
The gastrointestinal (GI) tract plays a central role in the absorption, distribution, metabolism, and excretion of flavonoids, which ultimately define the health effects of these bioactives. These aspects are modulated by the interactions of flavonoids with other dietary components, environmental factors, the host, and the GI microbiota. Flavonoid can target molecules in the luminal content, the different GI tract cell types, and the microbiota. Importantly, flavonoid actions at the GI tract can have an impact systemically, e...
January 6, 2018: Molecular Aspects of Medicine
https://www.readbyqxmd.com/read/29307107/upregulation-of-ghrelin-gene-expression-in-the-excluded-stomach-of-obese-women-with-type-2-diabetes-after-roux-en-y-gastric-bypass-in-the-surmetagit-study
#3
Danielle Cristina Fonseca, Priscila Sala, Joelle Singer, Pierre Singer, Raquel Susana Torrinhas, Dan Linetzky Waitzberg
BACKGROUND: Mechanisms of type 2 diabetes remission (T2Dr) after Roux-en-Y gastric bypass (RYGB) in obese patients appear to involve gastrointestinal hormones. OBJECTIVE: The objective of this study is to explore changes in ghrelin plasma levels and ghrelin gastrointestinal gene expression (GHRL) after RYGB, and their relationships to T2Dr. SETTING: In 20 obese women with T2D, before and 3 months after RYGB, we assessed GHRL expression by microarray and quantitative RT-PCR in gastrointestinal biopsy samples and plasma levels of ghrelin...
January 6, 2018: Obesity Surgery
https://www.readbyqxmd.com/read/29301445/gallstones-were-associated-with-the-gastrointestinal-adverse-events-of-cinacalcet-in-hemodialysis-patients-with-secondary-hyperparathyroidism
#4
Keiichi Otsuka, Yoichi Ohno, Joji Oshima
This study aimed to investigate the association of gastrointestinal (GI) adverse events of cinacalcet with gallstones in the hemodialysis (HD) patients with secondary hyperparathyroidism (SHPT). A total of 23 HD patients under the treatment with cinacalcet and 101 control patients were enrolled in this cross-sectional study. We investigated the prevalence of gallstones and the association of GI adverse events of cinacalcet with gallstones. The prevalence of gallstones was significantly higher in the HD patients with cinacalcet compared with the controls (47...
November 2018: Renal Failure
https://www.readbyqxmd.com/read/29295820/diet1-bile-acid-diarrhea-and-fgf15-19-mouse-model-and-human-genetic-variants
#5
Jessica M Lee, Jessica R Ong, Laurent Vergnes, Thomas Q de Aguiar Vallim, Jonathan Nolan, Rita M Cantor, Julian R F Walters, Karen Reue
Diet1 modulates intestinal production of the hormone fibroblast growth factor 15 (FGF15), which signals in liver to regulate bile acid synthesis. C57BL/6ByJ mice with a spontaneous Diet1 null mutation are resistant to hypercholesterolemia compared to wild-type C57BL/6J mice through enhanced cholesterol conversion to bile acids. To further characterize the role of Diet1 in metabolism, we generated Diet1-/- mice on the C57BL6/J genetic background. C57BL/6J Diet1-/- mice had elevated bile acid levels, reduced Fgf15 expression, and increased gastrointestinal motility and intestinal luminal water content, which are symptoms of bile acid diarrhea (BAD) in humans...
January 2, 2018: Journal of Lipid Research
https://www.readbyqxmd.com/read/29276790/a-central-role-for-hypoxia-inducible-factor-hif-2%C3%AE-in-hepatic-glucose-homeostasis
#6
REVIEW
Sadeesh K Ramakrishnan, Yatrik M Shah
Hepatic glucose production is regulated by hormonal and dietary factors. At fasting, 80% of glucose released into the circulation is derived from the liver, among which gluconeogenesis accounts for 55% and the rest by glycogenolysis. Studies suggest a complex mechanism involved in the regulation of hepatic glucose metabolism during fasting and post-absorptive phase. Oxygen plays a key role in numerous metabolic pathways such as TCA cycle, gluconeogenesis, glycolysis and fatty acid oxidation. Oxygenation of the gastrointestinal tract including liver and intestine is dynamically regulated by changes in the blood flow and metabolic activity...
December 7, 2017: Nutrition and Healthy Aging
https://www.readbyqxmd.com/read/29258769/calcium-and-vitamin-d-in-human-health-hype-or-real
#7
REVIEW
Sunil J Wimalawansa, DSc Mohammed S Razzaque, Nasser M Al-Daghri
The incidence and the prevalence of vitamin D deficiency are increasing worldwide. It is estimated that over 50% of population in the world have low in vitamin D (i.e., hypovitaminosis D; levels below 30 ng/mL). 80% of our vitamin D requirement comes from the ultraviolet rays from sunlight, and for the remainder, we rely from the diet and supplements. The latter become important when one is exposing to less than optimal amounts of sunlight, inability of the skin to generate vitamin D efficiently, and/or having secondary causes that leads to increase catabolism of vitamin D...
December 16, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/29250032/involvement-of-amylin-and-leptin-in-the-development-of-projections-from-the-area-postrema-to-the-nucleus-of-the-solitary-tract
#8
Kathrin Abegg, Andreas Hermann, Christina N Boyle, Sebastien G Bouret, Thomas A Lutz, Thomas Riediger
The area postrema (AP) and the nucleus of the solitary tract (NTS) are important hindbrain centers involved in the control of energy homeostasis. The AP mediates the anorectic action and the inhibitory effect on gastric emptying induced by the pancreatic hormone amylin. Amylin's target cells in the AP project to the NTS, an integrative relay center for enteroceptive signals. Perinatal hormonal and metabolic factors influence brain development. A postnatal surge of the adipocyte-derived hormone leptin represents a developmental signal for the maturation of projections between hypothalamic nuclei controlling energy balance...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/29238580/endometrioid-adenocarcinoma-arising-from-colon-endometriosis
#9
Viktoria-Varvara Palla, Georgios Karaolanis, Theodora Bliona, Ioannis Katafigiotis, Ioannis Anastasiou, Demetrios Hassiakos
Endometriosis-associated intestinal tumors represent the malignant transformation of gastrointestinal endometriosis. Approximately 50 cases have been reported in the literature. They are most commonly found among women aged 30-60 years, whereas exogenous hormone therapy and obesity are primary risk factors for the malignant transformation of endometriotic lesions. Clinical features simulate a primary colonic carcinoma. A high index of suspicion in conjunction with careful histological and immunohistochemical examination (CK7, CK20, CDX2, CD10, ER, and PR) is important for establishing a correct diagnosis...
2017: SAGE Open Medical Case Reports
https://www.readbyqxmd.com/read/29234626/consumptive-hypothyroidism-case-report-of-hepatic-hemangioendotheliomas-successfully-treated-with-vincristine-and-systematic-review-of-the-syndrome
#10
Marina Weber Pasa, Rafael Selbach Scheffel, André Borsatto Zanella, Ana Luiza Maia, José Miguel Dora
Objectives: To provide a comprehensive description of consumptive hypothyroidism syndrome (CHS), a severe form of hypothyroidism that occurs due to the high expression levels of thyroid hormone inactivation enzyme type 3 deiodinase (D3) in tumors. Study Design: Case report and systematic review. Results: A 7-month-old girl with a diagnosis of massive hepatic hemangioendotheliomas was treated with high doses of thyroid hormones and tumor-directed chemotherapy with vincristine...
November 2017: European Thyroid Journal
https://www.readbyqxmd.com/read/29231472/-acupuncture-with-smoothing-liver-and-regulating-qi-for-post-stroke-slow-transit-constipation-and-its-gastrointestinal-hormone-level
#11
Yanhong Gao, Jianmei Li, Mao Su, Yanling Li
OBJECTIVE: To compare the efficacy between acupuncture with smoothing liver and regulating qi and lactulose for post-stroke slow transit constipation(STC) and to explore the mechanism. METHODS: Sixty patients were randomized into an acupuncture group and a medication group,30 cases in each one. Based on the comprehensive stroke unit care,acupuncture with smoothing liver and regulating qi was used at Danzhong(CV 17),Qihai(CV 6),Tianshu(ST 25),Neiguan(PC 6),Gongsun(SP 4) and Taichong(LR 3) in the acupuncture group,once a day...
February 12, 2017: Zhongguo Zhen Jiu, Chinese Acupuncture & Moxibustion
https://www.readbyqxmd.com/read/29224668/circadian-clock-gastrointestinal-peptide-interaction-in-peripheral-tissues-and-the-brain
#12
REVIEW
Dominic Landgraf, Anne-Marie Neumann, Henrik Oster
Food intake and sleep are two mutually exclusive behaviors and both are normally confined to opposing phases of the diurnal cycle. The temporal coordination of behavior and physiology along the 24-h day-night cycle is organized by a network of circadian clocks that orchestrate transcriptional programs controlling cellular physiology. Many of the peptide hormones of the gastrointestinal tract are not only secreted in a circadian fashion, they can also affect circadian clock function in peripheral metabolic tissues and the brain, thus providing metabolic feedback to metabolic and neurobehavioral circuits...
December 2017: Best Practice & Research. Clinical Endocrinology & Metabolism
https://www.readbyqxmd.com/read/29221570/neohormones-in-milk
#13
REVIEW
Richard Ivell, Ravinder Anand-Ivell
Neohormone systems evolved specifically to regulate those mammalian traits, such as internal fertilization, pregnancy and lactation, which have proved to be central to the success, environmental independence, and adaptability of mammals as a vertebrate group. Neohormones such as oxytocin or relaxin are not only involved in the regulation of mammary gland development and function, but are also significant components of milk itself. Particularly for the latter hormone, it has been shown for the pig that relaxin in the first milk is taken up by the gastrointestinal tract of the offspring, enters the neonatal circulation and can have specific physiological and epigenetic effects on target organs such as the female reproductive system...
August 2017: Best Practice & Research. Clinical Endocrinology & Metabolism
https://www.readbyqxmd.com/read/29213271/visceral-inflammation-and-immune-activation-stress-the-brain
#14
REVIEW
Peter Holzer, Aitak Farzi, Ahmed M Hassan, Geraldine Zenz, Angela Jačan, Florian Reichmann
Stress refers to a dynamic process in which the homeostasis of an organism is challenged, the outcome depending on the type, severity, and duration of stressors involved, the stress responses triggered, and the stress resilience of the organism. Importantly, the relationship between stress and the immune system is bidirectional, as not only stressors have an impact on immune function, but alterations in immune function themselves can elicit stress responses. Such bidirectional interactions have been prominently identified to occur in the gastrointestinal tract in which there is a close cross-talk between the gut microbiota and the local immune system, governed by the permeability of the intestinal mucosa...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29210639/guanylate-cyclase-c-a-current-hot-target-from-physiology-to-pathology
#15
Jose Antonio Uranga, Marta Castro, Raquel Abalo
Guanylate cyclase C (GC-C) receptor is a transmembrane receptor, predominantly expressed in intestinal epithelial cells, that plays a main role in homeostasis and function of the digestive tract. The endogenous ligands for this receptor are the paracrine hormones uroguanylin and guanylin. The heat-stable enterotoxin, produced by enterotoxigenic bacteria, is also a natural ligand of this receptor. Upon ligand binding, GC-C receptors increase the second messenger cyclic guanosine monophosphate (cGMP) levels, regulating a variety of key cell-type specific processes such as chloride and bicarbonate secretion (which increases luminal fluid and intestinal motility), epithelial cell growth, regulation of intestinal barrier integrity and visceral sensitivity...
December 5, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/29183755/structural-determination-distribution-and-physiological-actions-of-ghrelin-in-the-guinea-pig
#16
Yuji Okuhara, Hiroyuki Kaiya, Hiroki Teraoka, Takio Kitazawa
We identified guinea pig ghrelin (gp-ghrelin), and examined its distribution and physiological actions in the guinea-pig. Gp-ghrelin is a 28-amino acid peptide (GASFR SPEHH SAQQR KESRK LPAKI QPR); seven amino acids are different from that of rat ghrelin at positions 2, 5, 10, 11, 19, 21, and 25, which include the conserved region known in mammals. The third serine residue is mainly modified by n-decanoyl acid. Both gp-ghrelin and rat ghrelin increased intracellular Ca2+ concentration of HEK293 cells expressing guinea pig growth hormone secretagogue receptor 1a (GHS-R1a), and the affinity of gp-ghrelin was slightly higher than that of rat ghrelin...
November 25, 2017: Peptides
https://www.readbyqxmd.com/read/29171778/effect-of-matrix-composition-sphere-size-and-hormone-concentration-on-diffusion-coefficient-of-insulin-for-controlled-gastrointestinal-delivery-for-diabetes-treatment
#17
Fernando Villaverde Cendon, Regina Maria Matos Jorge, Regina Weinschutz, Alvaro Luiz Mathias
Oral insulin administration is limited due to its degradation by proteases. The hormone was encapsulated in spheres made of either pure calcium alginate (ALG) or its association with whey protein isolate (WPI-ALG) in order to minimize loss in the stomach region while allowing liberation in the maximum absorption area, located in the intestine. Diffusion coefficients for both matrix compositions were determined in vitro for gastric pH (5.88 and 10.26 10(-12) m(2) s(-1)) and intestinal pH (21.11 and 79.29 10(-12) m(2) s(-1))...
November 24, 2017: Journal of Microencapsulation
https://www.readbyqxmd.com/read/29168078/the-effect-of-hypergastrinemia-following-sleeve-gastrectomy-and-pantoprazole-on-type-2-diabetes-mellitus-and-beta-cell-mass-in-goto-kakizaki-rats
#18
E Grong, C Nord, I B Arbo, M Eriksson, B E Kulseng, U Ahlgren, R Mårvik
PURPOSE: Metabolic surgery alters the secretion of gastrointestinal hormones that influence glycemic control. Elevated gastrin has been suggested to benefit patients with type 2 diabetes and has been reported following sleeve gastrectomy in rats. The present study compares the effect of hypergastrinemia following sleeve gastrectomy with proton-pump inhibitor therapy on glycemic control and beta-cell mass in lean, diabetic animals. METHODS: Thirty-three diabetic Goto-Kakizaki rats were randomized into pantoprazole + sham operation (GK-PPI), sleeve gastrectomy (GK-SG) and vehicle + sham operation (GK-V)...
November 22, 2017: Journal of Endocrinological Investigation
https://www.readbyqxmd.com/read/29163365/functional-mitochondria-in-health-and-disease
#19
REVIEW
Patries M Herst, Matthew R Rowe, Georgia M Carson, Michael V Berridge
The ability to rapidly adapt cellular bioenergetic capabilities to meet rapidly changing environmental conditions is mandatory for normal cellular function and for cancer progression. Any loss of this adaptive response has the potential to compromise cellular function and render the cell more susceptible to external stressors such as oxidative stress, radiation, chemotherapeutic drugs, and hypoxia. Mitochondria play a vital role in bioenergetic and biosynthetic pathways and can rapidly adjust to meet the metabolic needs of the cell...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/29163019/bile-acid-signaling-pathways-from-the-enterohepatic-circulation-to-the-central-nervous-system
#20
REVIEW
Kim L Mertens, Andries Kalsbeek, Maarten R Soeters, Hannah M Eggink
Bile acids are best known as detergents involved in the digestion of lipids. In addition, new data in the last decade have shown that bile acids also function as gut hormones capable of influencing metabolic processes via receptors such as FXR (farnesoid X receptor) and TGR5 (Takeda G protein-coupled receptor 5). These effects of bile acids are not restricted to the gastrointestinal tract, but can affect different tissues throughout the organism. It is still unclear whether these effects also involve signaling of bile acids to the central nervous system (CNS)...
2017: Frontiers in Neuroscience
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