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Bulc M, Całka J, Palus K. Administration of Different Doses of Acrylamide Changed the Chemical Coding of Enteric Neurons in the Jejunum in Gilts. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:14514. [PMID: 36361394 PMCID: PMC9657102 DOI: 10.3390/ijerph192114514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 10/31/2022] [Accepted: 11/02/2022] [Indexed: 06/16/2023]
Abstract
Excessive consumption of highly processed foods, such as chips, crisps, biscuits and coffee, exposes the human to different doses of acrylamide. This chemical compound has a multidirectional, adverse effect on human and animal health, including the central and peripheral nervous systems. In this study, we examined the effect of different doses of acrylamide on the enteric nervous system (ENS) of the porcine jejunum. Namely, we took into account the quantitative changes of neurons located in the jejunum wall expressing substance P (SP), galanin (GAL), a neuronal form of nitric oxide synthase (nNOS), the vesicular acetylcholine transporter (VAChT) and cocaine- and amphetamine-regulated transcript (CART). The obtained results indicate that acrylamide causes a statistically significant increase in the number of neurons immunoreactive to SP, GAL, VAChT and CART in all types of examined enteric plexuses and a significant drop in the population of nNOS-positive enteric neurons. Changes were significantly greater in the case of a high dose of acrylamide intoxication. Our results indicate that acrylamide is not indifferent to ENS neurons. A 28-day intoxication with this substance caused marked changes in the chemical coding of ENS neurons in the porcine jejunum.
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Ugan RA, Un H, Kose D, Cadirci E, Bal Tastan T, Yayla M, Halici Z. Can aprepitant used for nausea and vomiting be good gastrointestinal complaints? NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2020; 393:2463-2472. [PMID: 32743741 DOI: 10.1007/s00210-020-01956-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Accepted: 07/27/2020] [Indexed: 12/14/2022]
Abstract
Aprepitant is a selective SP/NK-1 receptor antagonist and used in postoperative and chemotherapeutics induced emesis and vomiting. The aim of our study is to show aprepitant may have beneficial effects on gastrointestinal complaints in cancer patients undergoing chemotherapeutics by indomethacin-induced gastric ulcer model. A total of 48 rats were fasted 24 h for ulcer experiment. Aprepitant doses of 5, 10, 20, and 40 mg/kg were evaluated for their antiulcer activity. Omeprazole (20 mg/kg) was used as a positive control group. Six hours after 25 mg/kg indomethacin administration, all stomachs were dissected out. After macroscopic analyses, tumor necrosis factor-alpha (TNF-α), interleukin-1β (IL-1β), COX-1, and COX-2 mRNA levels and SOD activity, and GSH and MDA levels of stomachs were determined. Histopathological examinations were evaluated. Aprepitant administration exerted 48.14%, 49.62%, 65.92%, and 76.77% ulcer inhibition effects at 5, 10, 20, and 40 mg/kg, respectively. Aprepitant administration decreased oxidative stress and inflammatory parameters in stomach tissues dose dependently. Aprepitant administration increased stomach COX-2 mRNA levels at 20 and 40 mg/kg doses. Although aprepitant appears to be disadvantageous in terms of treating gastric ulcer due to COX enzyme inhibition according to the previous studies, aprepitant has been shown to have ulcer healing effect in our study. When aprepitant is given as an anti-nausea and vomiting drug to cancer patients undergoing chemotherapy, we can argue that it will not be necessary to add a new gastric protective agent as it also shows beneficial effects in gastrointestinal complaints.
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Affiliation(s)
- Rustem Anil Ugan
- Department of Pharmacology, Faculty of Pharmacy, Ataturk University, 25240, Erzurum, Turkey.
| | - Harun Un
- Department of Biochemistry, Faculty of Pharmacy, Agri Ibrahim Cecen University, Agri, Turkey
| | - Duygu Kose
- Department of Pharmacology, Faculty of Medicine, Ataturk University, Erzurum, Turkey
| | - Elif Cadirci
- Department of Pharmacology, Faculty of Medicine, Ataturk University, Erzurum, Turkey
- Clinical Research, Development and Design Application and Research Center, Ataturk University, Erzurum, Turkey
| | - Tugba Bal Tastan
- Department of Histology and Embryology, Faculty of Medicine, Erzincan Binali Yidirim University, Erzincan, Turkey
| | - Muhammed Yayla
- Department of Pharmacology, Faculty of Medicine, Kafkas University, Kars, Turkey
| | - Zekai Halici
- Department of Pharmacology, Faculty of Medicine, Ataturk University, Erzurum, Turkey
- Clinical Research, Development and Design Application and Research Center, Ataturk University, Erzurum, Turkey
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Palus K, Całka J. Influence of Acrylamide Administration on the Neurochemical Characteristics of Enteric Nervous System (ENS) Neurons in the Porcine Duodenum. Int J Mol Sci 2019; 21:ijms21010015. [PMID: 31861419 PMCID: PMC6982244 DOI: 10.3390/ijms21010015] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Revised: 12/13/2019] [Accepted: 12/15/2019] [Indexed: 12/23/2022] Open
Abstract
The digestive tract, especially the small intestine, is one of the main routes of acrylamide absorption and is therefore highly exposed to the toxic effect of acrylamide contained in food. The aim of this experiment was to elucidate the effect of low (tolerable daily intake—TDI) and high (ten times higher than TDI) doses of acrylamide on the neurochemical phenotype of duodenal enteric nervous system (ENS) neurons using the pig as an animal model. The experiment was performed on 15 immature gilts of the Danish Landrace assigned to three experimental groups: control (C) group—pigs administered empty gelatine capsules, low dose (LD) group—pigs administered capsules with acrylamide at the TDI dose (0.5 μg/kg body weight (b.w.)/day), and the high dose (HD) group—pigs administered capsules with acrylamide at a ten times higher dose than the TDI (5 μg/kg b.w./day) with a morning feeding for 4 weeks. Administration of acrylamide, even in a low (TDI) dose, led to an increase in the percentage of enteric neurons immunoreactive to substance P (SP), calcitonin gene-related peptide (CGRP), galanin (GAL), neuronal nitric oxide synthase (nNOS), and vesicular acetylcholine transporter (VACHT) in the porcine duodenum. The severity of the changes clearly depended on the dose of acrylamide and the examined plexus. The obtained results suggest the participation of these neuroactive substances in acrylamide-inducted plasticity and the protection of ENS neurons, which may be an important line of defence from the harmful action of acrylamide.
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Palus K, Bulc M, Całka J. Changes in VIP-, SP- and CGRP- like immunoreactivity in intramural neurons within the pig stomach following supplementation with low and high doses of acrylamide. Neurotoxicology 2018; 69:47-59. [PMID: 30222996 DOI: 10.1016/j.neuro.2018.09.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Revised: 09/07/2018] [Accepted: 09/12/2018] [Indexed: 12/20/2022]
Abstract
Acrylamide is one of the food toxins to which the human body is exposed. Although researchers' interest in acrylamide has been growing in recent years, the knowledge of its effect on the gastrointestinal tract, especially on intramural neurons which form the enteric nervous system is scarce. The aim of this experiment was to determine the influence of acrylamide, administered at doses equivalent to the human tolerable daily intake (TDI, 0.5 μg/kg b.w./day) and ten times higher than the TDI (5 μg/kg b.w./day), on the distribution of vasoactive intestinal peptide (VIP), substance P (SP), and calcitonin gene related peptide (CGRP) in intramural neurons of the domestic pig stomach. Using double immunofluorescent labelling we revealed that the ENS neurons underwent adaptive changes in response to the supplementation of acrylamide, which manifested themselves as increased expression of VIP, SP and CGRP, both in intramural neurons and by an increase in the nerve density in submucous and muscular layers in the porcine stomach. These substances take part in defensive reactions of neurons and transmission of sensory reactions may play an important role in protecting the stomach against the harmful effect of acrylamide. Moreover, it has been shown that acrylamide induces a significant response of ENS neurons even in TDI dose, which suggests that it is not neutral to the body. These findings may be the basis for further toxicological studies addressing the question if currently permitted minimal content of acrylamide in the food does jeopardize the health of human consumers?
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Affiliation(s)
- Katarzyna Palus
- Department of Clinical Physiology, Faculty of Veterinary Medicine, University of Warmia and Mazury in Olsztyn, Oczapowskiego Str. 13, 10-718 Olsztyn, Poland.
| | - Michał Bulc
- Department of Clinical Physiology, Faculty of Veterinary Medicine, University of Warmia and Mazury in Olsztyn, Oczapowskiego Str. 13, 10-718 Olsztyn, Poland
| | - Jarosław Całka
- Department of Clinical Physiology, Faculty of Veterinary Medicine, University of Warmia and Mazury in Olsztyn, Oczapowskiego Str. 13, 10-718 Olsztyn, Poland
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Zádori ZS, Gyires K. In Vivo Measurement of Intragastric Pressure with a Rubber Balloon in the Anesthetized Rat. ACTA ACUST UNITED AC 2018; 57:21.12.1-6.17.11. [DOI: 10.1002/0471140856.tx2112s57] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Zoltán S. Zádori
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, Semmelweis University Budapest Hungary
| | - Klára Gyires
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, Semmelweis University Budapest Hungary
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Lénárd L, László K, Kertes E, Ollmann T, Péczely L, Kovács A, Kállai V, Zagorácz O, Gálosi R, Karádi Z. Substance P and neurotensin in the limbic system: Their roles in reinforcement and memory consolidation. Neurosci Biobehav Rev 2018; 85:1-20. [DOI: 10.1016/j.neubiorev.2017.09.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Revised: 08/24/2017] [Accepted: 09/02/2017] [Indexed: 12/18/2022]
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MCRT, a chimeric peptide based on morphiceptin and PFRTic-NH2, regulates the depressor effects induced by endokinin A/B. Eur J Pharmacol 2016; 792:33-37. [DOI: 10.1016/j.ejphar.2016.10.028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Revised: 10/21/2016] [Accepted: 10/21/2016] [Indexed: 01/13/2023]
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Boybeyi O, Soyer T, Atasoy P, Gunal YD, Aslan MK. Investigation of the effects of enteral hormones on the pyloric muscle in newborn rats. J Pediatr Surg 2015; 50:408-12. [PMID: 25746698 DOI: 10.1016/j.jpedsurg.2014.05.036] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Revised: 05/28/2014] [Accepted: 05/28/2014] [Indexed: 01/10/2023]
Abstract
PURPOSE To investigate the effects of enteral hormones on pyloric muscle in order to clarify the etiopathogenesis of hypertrophic pyloric stenosis (HPS). METHODS Forty-two newborn Wistar-Albino rats were included. No intervention was done in the control group (CG, n=6). In the sham group (SG, n=6) 1ml saline (0.9% NaCl solution), in the Nw-nitro-l-arginine methyl ester hydrochloride (L-NAME) group (LNG, n=6) 100mg/kg/d L-NAME, in the somatostatin group (STG, n=6) 7mcg/kg/d ST, in the cholecystokinin group (CCKG, n=6) 3mcg/kg/d CCK, in the substance P group (SPG, n=6) 5ml/kg/d SP, and in the prostaglandin-E1 group (PGE1G, n=6) a cumulative dose of 360mcg/kg PGE1 was given intraperitoneally for 14days. On the 21st day, histopathological examination and muscle thickness measurements were done. Results were evaluated statistically. RESULTS Total and circular pyloric muscle thicknesses were significantly increased in the LNG compared to the CG and SG (p<0.05). Circular pyloric muscle thickness was not increased in the STG, CCKG and SPG compared to the CG and SG (p>0.05). In the PGE1G, muscle thickness was significantly decreased in the pylorus and increased in the antrum compared to the CG and SG (p<0.05). CONCLUSION Nitric oxide synthase (NOS) inhibition with L-NAME seems to be a causative factor in HPS by increasing pyloric muscle thickness. PGE predominantly affects antral gastric muscle and has no profound effect on pyloric muscle.
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Affiliation(s)
- Ozlem Boybeyi
- Kırıkkale University, Medical Faculty, Department of Pediatric Surgery, Kırıkkale, Turkey.
| | - Tutku Soyer
- Hacettepe University, Medical Faculty, Department of Pediatric Surgery, Ankara, Turkey
| | - Pınar Atasoy
- Kırıkkale University, Medical Faculty, Department of Pathology, Kırıkkale, Turkey
| | - Yasemin Dere Gunal
- Kırıkkale University, Medical Faculty, Department of Pediatric Surgery, Kırıkkale, Turkey
| | - Mustafa Kemal Aslan
- Kırıkkale University, Medical Faculty, Department of Pediatric Surgery, Kırıkkale, Turkey
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Abstract
This paper is the thirty-sixth consecutive installment of the annual review of research concerning the endogenous opioid system. It summarizes papers published during 2013 that studied the behavioral effects of molecular, pharmacological and genetic manipulation of opioid peptides, opioid receptors, opioid agonists and opioid antagonists. The particular topics that continue to be covered include the molecular-biochemical effects and neurochemical localization studies of endogenous opioids and their receptors related to behavior, and the roles of these opioid peptides and receptors in pain and analgesia; stress and social status; tolerance and dependence; learning and memory; eating and drinking; alcohol and drugs of abuse; sexual activity and hormones, pregnancy, development and endocrinology; mental illness and mood; seizures and neurologic disorders; electrical-related activity and neurophysiology; general activity and locomotion; gastrointestinal, renal and hepatic functions; cardiovascular responses; respiration and thermoregulation; and immunological responses.
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Affiliation(s)
- Richard J Bodnar
- Department of Psychology and Neuropsychology Doctoral Sub-Program, Queens College, City University of New York, Flushing, NY 11367, United States.
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Zádori ZS, Tóth VE, Fehér Á, Philipp K, Németh J, Gyires K. Evidence for the gastric cytoprotective effect of centrally injected agmatine. Brain Res Bull 2014; 108:51-9. [DOI: 10.1016/j.brainresbull.2014.07.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Revised: 07/19/2014] [Accepted: 07/31/2014] [Indexed: 02/07/2023]
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Gyires K, Zádori ZS. Brain neuropeptides in gastric mucosal protection. Curr Opin Pharmacol 2014; 19:24-30. [PMID: 24971914 DOI: 10.1016/j.coph.2014.06.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2014] [Revised: 05/29/2014] [Accepted: 06/01/2014] [Indexed: 01/15/2023]
Abstract
The centrally induced gastroprotective effect of neuropeptides has been intensively studied. Besides many similarities, however, differences can also be observed in their gastroprotective actions. The gastroprotective dose-response curve proved to be either sigmoid, or bell-shaped. Additional gastrointestinal effects of neuropeptides can contribute to their mucosal protective effect. Part of the neuropeptides induces gastroprotection by peripheral administration as well. Besides vagal nerve the sympathetic nervous system may also be involved in conveying the central effect to the periphery. Better understanding of the complex mechanism of the maintenance of gastric mucosal integrity may result in the development of new strategy to enhance gastric mucosal resistance against injury.
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Affiliation(s)
- Klára Gyires
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, Semmelweis University, Nagyvárad tér 4, 1089, Budapest, Hungary.
| | - Zoltán S Zádori
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, Semmelweis University, Nagyvárad tér 4, 1089, Budapest, Hungary
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Onaga T. Tachykinin: recent developments and novel roles in health and disease. Biomol Concepts 2014; 5:225-43. [DOI: 10.1515/bmc-2014-0008] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2014] [Accepted: 05/14/2014] [Indexed: 01/26/2023] Open
Abstract
AbstractOver 80 years has passed since the discovery of substance P (SP), and a variety of peptides of the tachykinin (TK) family have been found and investigated. SP, neurokinin A (NKA), and neurokinin B (NKB) are representative peptides in mammalian species. SP and NKA are major excitatory neurotransmitters in the peripheral nervous system, while NKB is primarily involved in the central nervous system (CNS). Moreover, TK peptides play roles not only as neurotransmitters but also as local factors and are involved in almost all aspects of the regulation of physiological functions and pathophysiological processes. The role of SP as a mediator of pain processing and inflammation in peripheral tissues in coordination with transient receptor potential channels is well established, while novel aspects of TKs in relation to hematopoiesis, venous thromboembolism, tendinopathy, and taste perception have been clarified. In the CNS, the NKB signaling system in the hypothalamus has been shown to play a crucial role in the regulation of gonadotropin hormone secretion and the onset of puberty, and molecular biological studies have elucidated novel prophylaxic activities of TKs against neurogenic movement disorders based on their molecular structure. This review provides an overview of the novel aspects of TKs reported around the world in the last 5 years, with particular focus on nociception, inflammation, hemopoiesis, gonadotropin secretion, and CNS diseases.
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Affiliation(s)
- Takenori Onaga
- 1Laboratory of Veterinary Physiology and Nutrition, Division of Biosciences, Department of Veterinary Medicine, School of Veterinary Medicine, Rakuno Gakuen University, 582 Bunkyodai-Midorimachi, Ebetsu, Hokkaido 069-8501, Japan
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Gyires K, Rónai AZ, Zádori ZS, Tóth VE, Németh J, Szekeres M, Hunyady L. Angiotensin II-induced activation of central AT1 receptors exerts endocannabinoid-mediated gastroprotective effect in rats. Mol Cell Endocrinol 2014; 382:971-8. [PMID: 24145131 DOI: 10.1016/j.mce.2013.10.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2012] [Revised: 10/01/2013] [Accepted: 10/01/2013] [Indexed: 12/29/2022]
Abstract
The aim of the present study was to analyze whether angiotensin II via the endocannabinoid system can induce gastric mucosal protection, since transactivation of cannabinoid CB1 receptors by angiotensin AT1 receptor in CHO cells was described. Experimental ulcer was induced by acidified ethanol given orally in male Wistar rats, CB1(+/+) wild type and CB1(-/-) knockout mice. The compounds were administered intracerebroventricularly. It was found, that 1. Angiotensin II inhibited the ethanol-induced gastric lesions (11.9-191pmol); the effect of angiotensin II (191pmol) was inhibited by the CB1 receptor inverse agonist AM 251 (1.8nmol) and the inhibitor of diacylglycerol lipase (DAGL), tetrahydrolipstatin (0.2nmol). 2. Angiotensin II exerted gastroprotection in wild type, but not in CB1(-/-) mice. 3. The gastroprotective effect of angiotensin II (191pmol) was reduced by atropine (1mg/kg i.v.) and bilateral cervical vagotomy. In conclusion, stimulation of central angiotensin AT1 receptors via activation of cannabinoid CB1 receptors induces gastroprotection in a DAGL-dependent and vagus-mediated mechanism.
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MESH Headings
- Angiotensin II/pharmacology
- Animals
- Atropine/pharmacology
- CHO Cells
- Cricetulus
- Ethanol
- Gastric Mucosa/metabolism
- Gene Expression Regulation
- Injections, Intraventricular
- Lactones/pharmacology
- Lipoprotein Lipase/antagonists & inhibitors
- Lipoprotein Lipase/genetics
- Lipoprotein Lipase/metabolism
- Male
- Mice
- Mice, Knockout
- Orlistat
- Piperidines/pharmacology
- Pyrazoles/pharmacology
- Rats
- Rats, Wistar
- Receptor, Angiotensin, Type 1/genetics
- Receptor, Angiotensin, Type 1/metabolism
- Receptor, Cannabinoid, CB1/agonists
- Receptor, Cannabinoid, CB1/genetics
- Receptor, Cannabinoid, CB1/metabolism
- Signal Transduction
- Stomach/drug effects
- Stomach/pathology
- Stomach Ulcer/chemically induced
- Stomach Ulcer/drug therapy
- Stomach Ulcer/metabolism
- Stomach Ulcer/pathology
- Vagotomy
- Vagus Nerve
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Affiliation(s)
- Klára Gyires
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, Semmelweis University, Nagyvárad tér 4., 1089 Budapest, Hungary.
| | - András Z Rónai
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, Semmelweis University, Nagyvárad tér 4., 1089 Budapest, Hungary
| | - Zoltán S Zádori
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, Semmelweis University, Nagyvárad tér 4., 1089 Budapest, Hungary
| | - Viktória E Tóth
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, Semmelweis University, Nagyvárad tér 4., 1089 Budapest, Hungary
| | - József Németh
- Department of Pharmacology and Pharmacotherapy, University of Debrecen, Nagyerdei krt. 98., 4032 Debrecen, Hungary
| | - Mária Szekeres
- Department of Physiology, Faculty of Medicine, Semmelweis University, Tűzoltó u. 37-47., 1094 Budapest, Hungary
| | - László Hunyady
- Department of Physiology, Faculty of Medicine, Semmelweis University, Tűzoltó u. 37-47., 1094 Budapest, Hungary; Laboratory of Molecular Physiology, Semmelweis University and Hungarian Academy of Sciences, Tűzoltó u. 37-47., 1094 Budapest, Hungary
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Abstract
PURPOSE OF REVIEW To review recent developments in the field of gastroduodenal mucosal defense. RECENT FINDINGS Research in the field of gastroduodenal mucosal defense has focused on continued elucidation of molecular mechanisms that protect the mucosa and influence healing at the cellular level. Review of literature over the past year reveals focus on familiar processes such as superoxide dismutase, nitric oxide, heme oxygenase-1, neutrophil infiltration, cysteamine, mucin, hydrogen sulfide, ghrelin, adiponectin and the influence of Helicobacter pylori, but also brings into light new processes such as the balance between apoptosis and cellular proliferation, as well as the influence of other organ systems such as the bone marrow and central nervous system on the gastrointestinal tract. SUMMARY These new published findings contribute to our overall understanding of gastroduodenal defense and suggest innovative avenues of future research and possible novel therapeutic targets.
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