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https://www.readbyqxmd.com/read/28212895/the-influence-of-enteral-obestatin-administration-to-suckling-rats-on-intestinal-contractility
#1
M Słupecka, P Grzesiak, J Kwiatkowski, M Gajewska, A Kuwahara, I Kato, J Woliński
This study investigated the effect of enteral administration of obestatin on the contractility of whole-thickness preparations of duodenum and middle jejunum, as well as on the morphology of the enteric nervous system (ENS). Suckling rats were assigned to 3 groups (n=12) treated with: C- saline solution; LO- obestatin (125 nmol/kg b.wt); HO-obestatin (250 nmol/kg b.wt). Saline solution or obestatin were administered twice daily, from the 14(th) to the 21(st) day of life. Sections were studied in an organ bath, for isometric recording in the presence of acetylocholine (ACh), atropine (ATR) and tetradotoxin (TTX)...
February 14, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28209600/cell-therapy-for-gi-motility-disorders-comparison-of-cell-sources-and-proposed-steps-for-treating-hirschsprung-disease
#2
Lincon A Stamp
Cell therapeutic approaches to treat a range of congenital and degenerative neuropathies are under intense investigation. There have been recent significant advancements in the development of cell therapy to treat disorders of the enteric nervous system, enteric neuropathies. These advances include the efficient generation of enteric neural progenitors from pluripotent stem cells and the rescue of a Hirschsprung Disease model mouse following their transplantation into the bowel. Further, a recent study provides evidence of functional innervation of the bowel muscle by neurons derived from transplanted ENS-derived neural progenitors...
February 16, 2017: American Journal of Physiology. Gastrointestinal and Liver Physiology
https://www.readbyqxmd.com/read/28207737/the-enteric-nervous-system-promotes-intestinal-health-by-constraining-microbiota-composition
#3
Annah S Rolig, Erika K Mittge, Julia Ganz, Josh V Troll, Ellie Melancon, Travis J Wiles, Kristin Alligood, W Zac Stephens, Judith S Eisen, Karen Guillemin
Sustaining a balanced intestinal microbial community is critical for maintaining intestinal health and preventing chronic inflammation. The gut is a highly dynamic environment, subject to periodic waves of peristaltic activity. We hypothesized that this dynamic environment is a prerequisite for a balanced microbial community and that the enteric nervous system (ENS), a chief regulator of physiological processes within the gut, profoundly influences gut microbiota composition. We found that zebrafish lacking an ENS due to a mutation in the Hirschsprung disease gene, sox10, develop microbiota-dependent inflammation that is transmissible between hosts...
February 2017: PLoS Biology
https://www.readbyqxmd.com/read/28199825/lessons-learned-from-pioneering-neural-stem-cell-studies
#4
Sally Temple, Lorenz Studer
As stem cell products are increasingly entering early stage clinical trials, we are learning from experience about how cell products may be best assessed for safety and efficacy. In two papers published in this issue of Stem Cell Reports, a human neural stem cell product, HuCNS-SC, failed to demonstrate efficacy in central nervous system repair in two different animal models (Anderson et al., 2017; Marsh et al., 2017), although closely related research-grade cell products showed evidence of efficacy. This indicates the need for increased cell characterization to determine comparability of lots proposed for pre-clinical and clinical use...
February 14, 2017: Stem Cell Reports
https://www.readbyqxmd.com/read/28197779/colonic-mesenchyme-differentiates-into-smooth-muscle-before-its-colonization-by-vagal-enteric-neural-crest-derived-cells-in-the-chick-embryo
#5
Annick Bourret, Norbert Chauvet, Pascal de Santa Barbara, Sandrine Faure
During development, the gastrointestinal (GI) tract arises from a primary tube composed of mesoderm and endoderm. The mesoderm gives rise to the digestive mesenchyme, which in turn differentiates into multiple tissues, namely the submucosa, the interstitial cells of Cajal and the smooth muscle cells (SMCs). Concomitant with these early patterning events, the primitive GI tract is colonized by vagal enteric neural crest-derived cells (vENCDCs), a population of cells that gives rise to the enteric nervous system, the intrinsic innervation of the GI tract...
February 15, 2017: Cell and Tissue Research
https://www.readbyqxmd.com/read/28194405/abundance-and-significance-of-neuroligin-1-and-neurexin-ii-in-the-enteric-nervous-system-of-embryonic-rats
#6
Dongming Wang, Jingnian Pan, Guoxin Song, Ni Gao, Yi Zheng, Qiangye Zhang, Aiwu Li
Aim. To investigate the abundance of neuroligin-1 and neurexin II in the enteric nervous system (ENS) of rats on different embryonic days and to explore their potential significance. Methods. The full-thickness colon specimens proximal to the ileocecal junction of rats on embryonic days 16, 18, and 20 and of newborns within 24 hours (E16, E18, E20, and Ep0) were studied, respectively. qRT-PCR was applied for detecting the expressions of neuroligin-1 and neurexin II on mRNA, and western blotting was employed for detecting their further expressions on the whole tissue...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28190554/neuregulin-1-is-involved-in-enteric-nervous-system-development-in-zebrafish
#7
Jiarui Pu, Shaotao Tang, Qiangsong Tong, Guobin Wang, Haibo Jia, Qiong Jia, Kang Li, Dan Li, Dehua Yang, Jun Yang, Hang Li, Shuai Li, Hong Mei
BACKGROUND: Hirschsprung's disease (HD, also known as congenital colon aganglionosis) is a congenital disorder characterized by the absence of intramural ganglion cells in the distal gastrointestinal tract, which results in tonic contraction of the aganglionic gut segment and functional intestinal obstruction. Recent studies have indicated neuregulin 1 (NRG1) as a new candidate gene involved in the development of the enteric nervous system (ENS) in humans. METHODS: In our study, we investigated the role of NRG1 in zebrafish ENS development by assessing NRG1 expression patterns during ENS development...
January 23, 2017: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/28181921/feed-induced-dystonias-in-children-with-severe-central-nervous-system-disorders
#8
Santosh Mordekar, Manjula Velayudhan, David I Campbell
Dystonias can arise from any painful stimuli in neurologically disabled children. Classically, feed induced dystonias from mediastinal pain due to severe gastroesophageal reflux disease are described as Sandifer's spasm. We report a case series of 12 severely neurologically impaired children with enteral feed induced dystonias. Intestinal dysmotility was demonstrated in several. Improvements are seen with jejunal feeds or gut rest with Total Parenteral Nutrition. Use of parenteral nutrition in children with severe neurodisability requires thorough discussion with patient groups and commissioners to give clinicians guidelines to standardise care...
February 8, 2017: Journal of Pediatric Gastroenterology and Nutrition
https://www.readbyqxmd.com/read/28178902/nanobiomaterials-applications-in-neurodegenerative-diseases
#9
Daniela Silva Adaya, Lucinda Aguirre-Cruz, Jorge Guevara, Emma Ortiz-Islas
The blood-brain barrier is the interface between the blood and brain, impeding the passage of most circulating cells and molecules, protecting the latter from foreign substances, and maintaining central nervous system homeostasis. However, its restrictive nature constitutes an obstacle, preventing therapeutic drugs from entering the brain. Usually, a large systemic dose is required to achieve pharmacological therapeutic levels in the brain, leading to adverse effects in the body. As a consequence, various strategies are being developed to enhance the amount and concentration of therapeutic compounds in the brain...
February 2017: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/28178198/zinc-transporter-3-znt3-in-the-enteric-nervous-system-of-the-porcine-ileum-in-physiological-conditions-and-during-experimental-inflammation
#10
Sławomir Gonkowski, Maciej Rowniak, Joanna Wojtkiewicz
Zinc transporter 3 (ZnT3) is a member of the solute-linked carrier 30 (SLC 30) zinc transporter family. It is closely linked to the nervous system, where it takes part in the transport of zinc ions from the cytoplasm to the synaptic vesicles. ZnT3 has also been observed in the enteric nervous system (ENS), but its reactions in response to pathological factors remain unknown. This study, based on the triple immunofluorescence technique, describes changes in ZnT3-like immunoreactive (ZnT3-LI) enteric neurons in the porcine ileum, caused by chemically-induced inflammation...
February 7, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28168732/two-modes-of-enteric-gliotransmission-differentially-affect-gut-physiology
#11
Vladimir Grubišić, Vladimir Parpura
Enteric glia (EG) in the enteric nervous system can modulate neuronally regulated gut functions. Using molecular genetics, we assessed the effects that molecular entities expressed in EG and otherwise mediating two distinct mechanisms of gliotransmitter release, connexin 43 (Cx43) hemichannel vs. Ca(2+) -dependent exocytosis, have on gut function. The expression of mutated Cx43(G138R) (which favors hemichannel, as opposed to gap-junctional activity) in EG increased gut motility in vivo, while a knock-down of Cx43 in EG resulted in the reduction of gut motility...
February 7, 2017: Glia
https://www.readbyqxmd.com/read/28158225/visualizing-the-enteric-nervous-system-using-genetically-engineered-double-reporter-mice-comparison-with-immunofluorescence
#12
Yanfen Jiang, Hui Dong, Lars Eckmann, Elaine M Hanson, Katherine C Ihn, Ravinder K Mittal
BACKGROUND AND AIMS: The enteric nervous system (ENS) plays a crucial role in the control of gastrointestinal motility, secretion and absorption functions. Immunohistochemistry has been widely used to visualize neurons of the ENS for more than two decades. Genetically engineered mice that report specific proteins can also be used to visualize neurons of the ENS. The goal of our study was to develop a mouse that expresses fluorescent neuronal nitric oxide synthase (nNOS) and choline acetyltransferase (ChAT), the two proteins expressed in 95% of the ENS neurons...
2017: PloS One
https://www.readbyqxmd.com/read/28155133/parkinson-s-disease-as-a-multisystem-disorder
#13
Lisa Klingelhoefer, H Reichmann
This article summarises the noteworthy contribution of Professor Jellinger to the understanding of Parkinson's disease (PD) as a disease affecting multiple body- and neurotransmitter-systems. Phosphorylated alpha-synuclein and the formation of Lewy pathology as neuropathological hallmarks of PD seem to spread from the enteric nervous system and the olfactory bulb in a rostrocranial direction to the CNS. Subsequently, a progressive degeneration of the dopaminergic-nigrostriatal system and widespread extranigral pathology affecting different anatomical structures and neurotransmitters are induced causing the various non-motor and motor symptoms of PD...
February 2, 2017: Journal of Neural Transmission
https://www.readbyqxmd.com/read/28154012/gastrointestinal-immune-and-microbiome-changes-during-parenteral-nutrition
#14
Joseph F Pierre
Parenteral Nutrition (PN) is a lifesaving therapy that provides intravenous nutrition support to patients who cannot, or should not, feed via the gastrointestinal tract. Unfortunately, PN also carries certain risks related to infection and metabolic complications compared with enteral nutrition. In this review, an overview of PN and gastrointestinal (GI) immune and microbiome changes is provided. PN impacts the gut-associated lymphoid tissue (GALT) functions - especially adaptive immune cells - changes to intestinal epithelium and chemical secretions, and significantly alters the intestinal microbiome...
February 2, 2017: American Journal of Physiology. Gastrointestinal and Liver Physiology
https://www.readbyqxmd.com/read/28152033/no-neuronal-loss-but-alterations-of-the-gdnf-system-in-asymptomatic-diverticulosis
#15
Martina Barrenschee, Thilo Wedel, Christina Lange, Ines Hohmeier, François Cossais, Michael Ebsen, Ilka Vogel, Martina Böttner
BACKGROUND: Glial cell line-derived neurotrophic factor (GDNF) is a potent neurotrophic factor known to promote the survival and maintenance of neurons not only in the developing but also in the adult enteric nervous system. As diverticular disease (DD) is associated with reduced myenteric neurons, alterations of the GDNF system were studied in asymptomatic diverticulosis (diverticulosis) and DD. METHODS: Morphometric analysis for quantifying myenteric ganglia and neurons were assessed in colonic full-thickness sections of patients with diverticulosis and controls...
2017: PloS One
https://www.readbyqxmd.com/read/28149034/acute-pesticide-ingestion-managed-with-yohimbine-as-a-rescue-therapy
#16
Prashant Nasa, Deven Juneja
Amitraz is used as a pesticide in agricultural and veterinary medicine. It is primarily a central α2 adrenergic agonist and known to cause central nervous system depression, convulsions, respiratory depression, and bradycardia on severe intoxication. We report a case of a 3-year-old child who presented with accidental ingestion of amitraz solution with signs of severe poisoning. There is no specific antidote of amitraz poisoning in humans, however, animal experiments with α2 adrenergic antagonists such as yohimbine and atimepazole have been successful...
December 2016: Indian Journal of Critical Care Medicine
https://www.readbyqxmd.com/read/28143979/trojan-horse-transit-contributes-to-blood-brain-barrier-crossing-of-a-eukaryotic-pathogen
#17
Felipe H Santiago-Tirado, Michael D Onken, John A Cooper, Robyn S Klein, Tamara L Doering
: The blood-brain barrier (BBB) protects the central nervous system (CNS) by restricting the passage of molecules and microorganisms. Despite this barrier, however, the fungal pathogen Cryptococcus neoformans invades the brain, causing a meningoencephalitis that is estimated to kill over 600,000 people annually. Cryptococcal infection begins in the lung, and experimental evidence suggests that host phagocytes play a role in subsequent dissemination, although this role remains ill defined...
January 31, 2017: MBio
https://www.readbyqxmd.com/read/28141730/-footprints-in-the-bathroom-the-role-of-spirituality-in-patient-diagnosis
#18
Veronica Meneses, Douglas Vanderbilt, Linda Barnes, Marilyn Augustyn
Lucy is a 12-year-old Latina whose mother brought her to the pediatric clinic for help with her anxiety symptoms, "hearing voices," and episodes of "spacing out." Lucy did not cry at birth secondary to vocal cord paralysis and still has the tracheostomy performed at a few days of life. In addition to her neonatal intensive care unit stay, she has been hospitalized for pneumonia. Her mother says she is "sickly" and has a weak immune system due to her asthma symptoms. Lucy also experiences somatic complaints related to gastroesophageal reflux and constipation...
February 2017: Journal of Developmental and Behavioral Pediatrics: JDBP
https://www.readbyqxmd.com/read/28137646/loss-of-nitrergic-and-cholinergic-neurons-in-the-enteric-nervous-system-of-app-ps1-transgenic-mouse-model
#19
Xiaolei Han, Shi Tang, Lingling Dong, Lin Song, Yi Dong, Yongxiang Wang, Yifeng Du
Alzheimer's disease (AD) is an age-related neurodegenerative brain disorder characterized by aggregation of amyloid-β (Aβ) peptide, formation of neurofibrillary tangles, synaptic loss, and neuronal cell death; however, the characteristic pathological alterations taking place in the "second brain"-enteric nervous system is still largely undefined. In this study, we aimed to detect the pathological changes in the APP/PS1 mice ileum by a novel whole mount technique. The deposition of Aβ plaque and the overexpression of phosphorylated Tau (pTau) protein were observed in the myenteric neurons of APP/PS1 mice...
January 27, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28134764/the-pleiotropic-role-of-l1cam-in-tumor-vasculature
#20
REVIEW
Francesca Angiolini, Ugo Cavallaro
Angiogenesis, the formation of new vessels, is a key step in the development, invasion, and dissemination of solid tumors and, therefore, represents a viable target in the context of antitumor therapy. Indeed, antiangiogenic approaches have given promising results in preclinical models and entered the clinical practice. However, in patients, the results obtained so far with antiangiogenic drugs have not completely fulfilled expectations, especially because their effect has been transient with tumors developing resistance and evasion mechanisms...
January 26, 2017: International Journal of Molecular Sciences
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