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Capodanno Y, Hirth M. Targeting the Cancer-Neuronal Crosstalk in the Pancreatic Cancer Microenvironment. Int J Mol Sci 2023; 24:14989. [PMID: 37834436 PMCID: PMC10573820 DOI: 10.3390/ijms241914989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Accepted: 10/04/2023] [Indexed: 10/15/2023] Open
Abstract
Pancreatic ductal adenocarcinoma (PDAC) represents one of the most aggressive solid tumors with a dismal prognosis and an increasing incidence. At the time of diagnosis, more than 85% of patients are in an unresectable stage. For these patients, chemotherapy can prolong survival by only a few months. Unfortunately, in recent decades, no groundbreaking therapies have emerged for PDAC, thus raising the question of how to identify novel therapeutic druggable targets to improve prognosis. Recently, the tumor microenvironment and especially its neural component has gained increasing interest in the pancreatic cancer field. A histological hallmark of PDAC is perineural invasion (PNI), whereby cancer cells invade surrounding nerves, providing an alternative route for metastatic spread. The extent of PNI has been positively correlated with early tumor recurrence and reduced overall survival. Multiple studies have shown that mechanisms involved in PNI are also involved in tumor spread and pain generation. Targeting these pathways has shown promising results in alleviating pain and reducing PNI in preclinical models. In this review, we will describe the mechanisms and future treatment strategies to target this mutually trophic interaction between cancer cells to open novel avenues for the treatment of patients diagnosed with PDAC.
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Affiliation(s)
- Ylenia Capodanno
- Institute of Pharmacology, Medical Faculty Heidelberg, Heidelberg University, Im Neuenheimer Feld 366, 69117 Heidelberg, Germany
- Department of Medicine II, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1–3, 68167 Mannheim, Germany
| | - Michael Hirth
- Department of Medicine II, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1–3, 68167 Mannheim, Germany
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2
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Tandur VK, Inamdar MN, Alamri A, Alhomrani M, Alsanie WF, Rabbani SI, Asdaq SMB. Gut Stimulatory Effect of Terminalia chebula in Experimental Animal Models. INT J PHARMACOL 2022. [DOI: 10.3923/ijp.2022.1466.1473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Preclinical Studies to Evaluate the Gut Stimulatory Activity of Aloe Musabbar. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2022; 2022:4163008. [PMID: 35795288 PMCID: PMC9251092 DOI: 10.1155/2022/4163008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Accepted: 06/09/2022] [Indexed: 11/20/2022]
Abstract
Background Constipation is a common functional gastrointestinal disorder. Medicines derived from nature are routinely used to treat it. The present study evaluates the gut stimulatory activity of Aloe musabbar (processed powder of Aloe vera) using in vitro and in vivo models for gut stimulatory activity. Materials and Methods In vitro tests were conducted on isolated rat colon, guinea pig ileum, and rabbit jejunum, while in vivo study was performed using mice intestinal transit time. Aloe musabbar (A. musabbar) was tested at doses 0.2–200 mg/mL (in-vitro study) and 86.6 mg/kg (in vivo study). In vitro studies were done in the presence and absence of atropine sulphate (1 ng/ml). The results were statistically analyzed, and p < 0.05 was considered to indicate the significance. Results A. musabbar exhibited dose-dependent increase in the smooth muscle contraction of isolated gut tissues. Presence of atropine minimized the contractile responses and shifted the dose-response curves towards the right-hand side. The intestinal transit time in mice was observed to be increased significantly (p < 0.01) in A. musabbar-treated animals, when compared with normal animals. Conclusion A mild smooth muscle contraction induced by A. musabbar suggests that it can stimulate intestinal bowel movement without causing spasms. The diminished responses in the presence of atropine indicated that the gut stimulatory activity could be mediated partially through parasympathetic innervations. More studies are needed to determine the precise mechanism of action including the specific active ingredient responsible for the gut stimulatory activity.
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Skin immunity: dissecting the complex biology of our body's outer barrier. Mucosal Immunol 2022; 15:551-561. [PMID: 35361906 DOI: 10.1038/s41385-022-00505-y] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 03/10/2022] [Accepted: 03/11/2022] [Indexed: 02/04/2023]
Abstract
Our skin contributes critically to health via its role as a barrier tissue, carefully regulating passage of key substrates while also providing defense against exogenous threats. Immunological processes are integral to almost every skin function and paramount to our ability to live symbiotically with skin commensal microbes and other environmental stimuli. While many parallels can be drawn to immunobiology at other mucosal sites, skin immunity demonstrates unique features that relate to its distinct topography, chemical composition and microbial ecology. Here we provide an overview of skin as an immune organ, with reference to the broader context of mucosal immunology. We review paradigms of innate as well as adaptive immune function and highlight how skin-specific structures such as hair follicles and sebaceous glands interact and contribute to these processes. Finally, we highlight for the mucosal immunology community a few emerging areas of interest for the skin immunity field moving forward.
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Cho K, Ueno M, Liang Y, Kim D, Oda T. Generation of Reactive Oxygen Species (ROS) by Harmful Algal Bloom (HAB)-Forming Phytoplankton and Their Potential Impact on Surrounding Living Organisms. Antioxidants (Basel) 2022; 11:206. [PMID: 35204089 PMCID: PMC8868398 DOI: 10.3390/antiox11020206] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 01/19/2022] [Accepted: 01/20/2022] [Indexed: 01/27/2023] Open
Abstract
Most marine phytoplankton with relatively high ROS generation rates are categorized as harmful algal bloom (HAB)-forming species, among which Chattonella genera is the highest ROS-producing phytoplankton. In this review, we examined marine microalgae with ROS-producing activities, with focus on Chattonella genera. Several studies suggest that Chattonella produces superoxide via the activities of an enzyme similar to NADPH oxidase located on glycocalyx, a cell surface structure, while hydrogen peroxide is generated inside the cell by different pathways. Additionally, hydroxyl radical has been detected in Chattonella cell suspension. By the physical stimulation, such as passing through between the gill lamellas of fish, the glycocalyx is easily discharged from the flagellate cells and attached on the gill surface, where ROS are continuously produced, which might cause gill tissue damage and fish death. Comparative studies using several strains of Chattonella showed that ROS production rate and ichthyotoxicity of Chattonella is well correlated. Furthermore, significant levels of ROS have been reported in other raphidophytes and dinoflagellates, such as Cochlodinium polykrikoides and Karenia mikimotoi. Chattonella is the most extensively studied phytoplankton in terms of ROS production and its biological functions. Therefore, this review examined the potential ecophysiological roles of extracellular ROS production by marine microalgae in aquatic environment.
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Affiliation(s)
- Kichul Cho
- Department of Microbiology, National Marine Biodiversity Institute of Korea (MABIK), Seocheon 33662, Korea;
| | - Mikinori Ueno
- Graduate School of Fisheries Science & Environmental Studies, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan; (M.U.); (Y.L.)
| | - Yan Liang
- Graduate School of Fisheries Science & Environmental Studies, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan; (M.U.); (Y.L.)
| | - Daekyung Kim
- Daegu Center, Korea Basic Science Institute (KBSI), Daegu 41566, Korea
| | - Tatsuya Oda
- Graduate School of Fisheries Science & Environmental Studies, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan; (M.U.); (Y.L.)
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Pauluhn J. Inhalation toxicity of cyclic semi-volatile methylsiloxanes: Disentangling the conundrum of phase-specific adaptations from adverse outcomes. Regul Toxicol Pharmacol 2021; 122:104923. [PMID: 33831492 DOI: 10.1016/j.yrtph.2021.104923] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 02/23/2021] [Accepted: 03/30/2021] [Indexed: 01/06/2023]
Abstract
This paper compares the phase-specific inhalation toxicity of the cyclic semi-volatile methylsiloxanes (cVMSs) D4, D5 and D6. The objectives of this paper are to re-analyze information from acute to chronic inhalation studies on rats with these cVMSs to identify the unifying principles of phase-specific toxicity at the portal-of-entry and if they depend on acute, acute-on-chronic or chronic mechanisms. This re-analysis supports the hypothesis that concentrations must be high enough to exceed the vapor saturation at any given temperature for stabilizing the aerosol phase and evoking phase-specific effects at sites of the respiratory tract susceptible to the cVMSs-specific physicochemical properties amphiphilicity and surface tension. In summary, the portal-of-entry effects and related findings appear to be acute in nature and specific to liquid aerosol. The repeated inhalation exposure studies with D4 and D5 up to two years in duration did not reveal chronic aggravations of portal of entry outcomes. Findings at a pulmonary location where amphiphilic surfactant molecules are present appear to be caused by the acute adaptation to deposited dose. Such outcome should better be described as a high-dose liquid aerosol phenomenon imparted by the physicochemical properties "liquid" and "hydrophobic". This calls for a phase-specific human risk characterization of cVMSs.
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Affiliation(s)
- Juergen Pauluhn
- Hanover Medical School, Hannover, Germany; Bayer HealthCare, Toxicology, Wuppertal, Germany(1).
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7
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Langowski JKA, Singla S, Nyarko A, Schipper H, van den Berg FT, Kaur S, Astley HC, Gussekloo SWS, Dhinojwala A, van Leeuwen JL. Comparative and functional analysis of the digital mucus glands and secretions of tree frogs. Front Zool 2019; 16:19. [PMID: 31210775 PMCID: PMC6563374 DOI: 10.1186/s12983-019-0315-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Accepted: 05/06/2019] [Indexed: 12/18/2022] Open
Abstract
Background Mucus and mucus glands are important features of the amphibian cutis. In tree frogs, the mucus glands and their secretions are crucial components of the adhesive digital pads of these animals. Despite a variety of hypothesised functions of these components in tree frog attachment, the functional morphology of the digital mucus glands and the chemistry of the digital mucus are barely known. Here, we use an interdisciplinary comparative approach to analyse these components, and discuss their roles in tree frog attachment. Results Using synchrotron micro-computer-tomography, we discovered in the arboreal frog Hyla cinerea that the ventral digital mucus glands differ in their morphology from regular anuran mucus glands and form a subdermal gland cluster. We show the presence of this gland cluster also in several other—not exclusively arboreal—anuran families. Using cryo-histochemistry as well as infrared and sum frequency generation spectroscopy on the mucus of two arboreal (H. cinerea and Osteopilus septentrionalis) and of two terrestrial, non-climbing frog species (Pyxicephalus adspersus and Ceratophrys cranwelli), we find neutral and acidic polysaccharides, and indications for proteinaceous and lipid-like mucus components. The mucus chemistry varies only little between dorsal and ventral digital mucus in H. cinerea, ventral digital and abdominal mucus in H. cinerea and O. septentrionalis, and between the ventral abdominal mucus of all four studied species. Conclusions The presence of a digital mucus gland cluster in various anuran families, as well as the absence of differences in the mucus chemistry between arboreal and non-arboreal frog species indicate an adaptation towards generic functional requirements as well as to attachment-related requirements. Overall, this study contributes to the understanding of the role of glands and their secretions in tree frog attachment and in bioadhesion in general, as well as the evolution of anurans. Electronic supplementary material The online version of this article (10.1186/s12983-019-0315-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Julian K A Langowski
- 1Experimental Zoology Group, Department of Animal Sciences, Wageningen University & Research, De Elst 1, Wageningen, 6708 WD The Netherlands
| | - Saranshu Singla
- 2Department of Polymer Science, The University of Akron, 170 University Ave, Akron, Ohio 44325-3909 USA
| | - Alex Nyarko
- 2Department of Polymer Science, The University of Akron, 170 University Ave, Akron, Ohio 44325-3909 USA
| | - Henk Schipper
- 1Experimental Zoology Group, Department of Animal Sciences, Wageningen University & Research, De Elst 1, Wageningen, 6708 WD The Netherlands
| | - Frank T van den Berg
- 1Experimental Zoology Group, Department of Animal Sciences, Wageningen University & Research, De Elst 1, Wageningen, 6708 WD The Netherlands
| | - Sukhmanjot Kaur
- 2Department of Polymer Science, The University of Akron, 170 University Ave, Akron, Ohio 44325-3909 USA
| | - Henry C Astley
- 3Biomimicry Research & Innovation Center, Departments of Biology and Polymer Science, The University of Akron, 235 Carroll St., Akron, Ohio 44325-3908 USA
| | - Sander W S Gussekloo
- 1Experimental Zoology Group, Department of Animal Sciences, Wageningen University & Research, De Elst 1, Wageningen, 6708 WD The Netherlands
| | - Ali Dhinojwala
- 2Department of Polymer Science, The University of Akron, 170 University Ave, Akron, Ohio 44325-3909 USA
| | - Johan L van Leeuwen
- 1Experimental Zoology Group, Department of Animal Sciences, Wageningen University & Research, De Elst 1, Wageningen, 6708 WD The Netherlands
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Renz BW, Tanaka T, Sunagawa M, Takahashi R, Jiang Z, Macchini M, Dantes Z, Valenti G, White RA, Middelhoff MA, Ilmer M, Oberstein PE, Angele MK, Deng H, Hayakawa Y, Westphalen CB, Werner J, Remotti H, Reichert M, Tailor YH, Nagar K, Friedman RA, Iuga AC, Olive KP, Wang TC. Cholinergic Signaling via Muscarinic Receptors Directly and Indirectly Suppresses Pancreatic Tumorigenesis and Cancer Stemness. Cancer Discov 2018; 8:1458-1473. [PMID: 30185628 PMCID: PMC6214763 DOI: 10.1158/2159-8290.cd-18-0046] [Citation(s) in RCA: 155] [Impact Index Per Article: 25.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 07/15/2018] [Accepted: 08/30/2018] [Indexed: 12/18/2022]
Abstract
In many solid tumors, parasympathetic input is provided by the vagus nerve, which has been shown to modulate tumor growth. However, whether cholinergic signaling directly regulates progression of pancreatic ductal adenocarcinoma (PDAC) has not been defined. Here, we found that subdiaphragmatic vagotomy in LSL-Kras +/G12D;Pdx1-Cre (KC) mice accelerated PDAC development, whereas treatment with the systemic muscarinic agonist bethanechol restored the normal KC phenotype, thereby suppressing the accelerated tumorigenesis caused by vagotomy. In LSL-Kras +/G12D;LSL-Trp53 +/R172H;Pdx1-Cre mice with established PDAC, bethanechol significantly extended survival. These effects were mediated in part through CHRM1, which inhibited downstream MAPK/EGFR and PI3K/AKT pathways in PDAC cells. Enhanced cholinergic signaling led to a suppression of the cancer stem cell (CSC) compartment, CD11b+ myeloid cells, TNFα levels, and metastatic growth in the liver. Therefore, these data suggest that cholinergic signaling directly and indirectly suppresses growth of PDAC cells, and therapies that stimulate muscarinic receptors may be useful in the treatment of PDAC.Significance: Subdiaphragmatic vagotomy or Chrm1 knockout accelerates pancreatic tumorigenesis, in part via expansion of the CSC compartment. Systemic administration of a muscarinic agonist suppresses tumorigenesis through MAPK and PI3K/AKT signaling, in early stages of tumor growth and in more advanced, metastatic disease. Therefore, CHRM1 may represent a potentially attractive therapeutic target. Cancer Discov; 8(11); 1458-73. ©2018 AACR. This article is highlighted in the In This Issue feature, p. 1333.
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MESH Headings
- Animals
- Carcinoma, Pancreatic Ductal/metabolism
- Carcinoma, Pancreatic Ductal/pathology
- Carcinoma, Pancreatic Ductal/prevention & control
- Cell Transformation, Neoplastic/drug effects
- Cell Transformation, Neoplastic/metabolism
- Cell Transformation, Neoplastic/pathology
- Cholinergic Agents/pharmacology
- Genes, ras
- Humans
- Mice
- Mice, Inbred C57BL
- Mice, Inbred NOD
- Mice, Knockout
- Mice, SCID
- Neoplastic Stem Cells/drug effects
- Neoplastic Stem Cells/metabolism
- Neoplastic Stem Cells/pathology
- Pancreatic Neoplasms/metabolism
- Pancreatic Neoplasms/pathology
- Pancreatic Neoplasms/prevention & control
- Receptor, Muscarinic M1/physiology
- Signal Transduction
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Affiliation(s)
- Bernhard W Renz
- Department of General, Visceral and Transplantation Surgery, Hospital of the University of Munich, Munich, Germany; German Cancer Consortium (DKTK), Partner Site Munich; and German Cancer Research Center (DKFZ), Heidelberg, Germany
- Division of Digestive and Liver Diseases and Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, New York
| | - Takayuki Tanaka
- Division of Digestive and Liver Diseases and Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, New York
- Department of Surgery, Nagasaki University Graduate School of Biomedical Sciences, Sakamoto, Nagasaki, Japan
| | - Masaki Sunagawa
- Division of Digestive and Liver Diseases and Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, New York
| | - Ryota Takahashi
- Division of Digestive and Liver Diseases and Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, New York
| | - Zhengyu Jiang
- Division of Digestive and Liver Diseases and Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, New York
| | - Marina Macchini
- Division of Digestive and Liver Diseases and Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, New York
- Department of Oncology, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Zahra Dantes
- Department of Medicine II, Klinikum Rechts der Isar, Technische Universität München, Munich, Germany
| | - Giovanni Valenti
- Division of Digestive and Liver Diseases and Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, New York
| | - Ruth A White
- Division of Oncology, Department of Medicine and Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, New York
| | - Moritz A Middelhoff
- Division of Digestive and Liver Diseases and Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, New York
| | - Matthias Ilmer
- Department of General, Visceral and Transplantation Surgery, Hospital of the University of Munich, Munich, Germany; German Cancer Consortium (DKTK), Partner Site Munich; and German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Paul E Oberstein
- Perlmutter Cancer Center, New York University Langone Medical Center, New York, New York
| | - Martin K Angele
- Department of General, Visceral and Transplantation Surgery, Hospital of the University of Munich, Munich, Germany; German Cancer Consortium (DKTK), Partner Site Munich; and German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Huan Deng
- Division of Digestive and Liver Diseases and Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, New York
- Department of Pathology, and Molecular Medicine and Genetics Center, The Fourth Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China
| | - Yoku Hayakawa
- Division of Digestive and Liver Diseases and Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, New York
- Department of Gastroenterology, Graduate School of Medicine, the University of Tokyo, Tokyo, Japan
| | - C Benedikt Westphalen
- Division of Digestive and Liver Diseases and Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, New York
- Department of Internal Medicine III, Hospital of the University of Munich, Munich, Germany; German Cancer Consortium (DKTK), Partner Site Munich; and German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Jens Werner
- Department of General, Visceral and Transplantation Surgery, Hospital of the University of Munich, Munich, Germany; German Cancer Consortium (DKTK), Partner Site Munich; and German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Helen Remotti
- Department of Pathology and Cell Biology, Columbia University Medical Center, New York, New York
| | - Maximilian Reichert
- Department of Medicine II, Klinikum Rechts der Isar, Technische Universität München, Munich, Germany
| | - Yagnesh H Tailor
- Division of Digestive and Liver Diseases and Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, New York
| | - Karan Nagar
- Division of Digestive and Liver Diseases and Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, New York
| | - Richard A Friedman
- Biomedical Informatics Shared Resource of the Herbert Irving Comprehensive Cancer Center and Department of Biomedical Informatics, Columbia University Medical Center, New York, New York
| | - Alina C Iuga
- Department of Pathology and Cell Biology, Columbia University Medical Center, New York, New York
| | - Kenneth P Olive
- Division of Digestive and Liver Diseases and Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, New York
- Department of Pathology and Cell Biology and Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, New York
| | - Timothy C Wang
- Division of Digestive and Liver Diseases and Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, New York.
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10
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Schueler RO, White G, Schueler RL, Steiner JM, Wassef A. Canine pancreatic lipase immunoreactivity concentrations associated with intervertebral disc disease in 84 dogs. J Small Anim Pract 2018; 59:305-310. [PMID: 29355958 DOI: 10.1111/jsap.12818] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Revised: 11/28/2017] [Accepted: 12/20/2017] [Indexed: 12/21/2022]
Abstract
OBJECTIVE To determine the differences in serum canine pancreatic lipase immunoreactivity between dogs with intervertebral disc herniation and healthy control dogs. MATERIALS AND METHODS Eighty-four client-owned dogs with intervertebral disc herniation, diagnosed by neurologic examination and imaging, and 18 healthy control dogs. Samples of whole blood were collected within 90 minutes of admission. Serum canine pancreatic lipase immunoreactivity concentrations were measured by a commercial immunoassay and evaluated for association with intervertebral disc herniation, signalment, neurolocalisation and the preadmission administration of glucocorticosteriods or non-steroidal anti-inflammatory drugs. RESULTS Serum canine pancreatic lipase immunoreactivity concentrations were statistically increased in dogs with intervertebral disc herniation (P<0·01, n=38). A subgroup of dogs (19/38) with elevated canine pancreatic lipase immunoreactivity concentrations was re-evaluated between 2 and 4 weeks later, and 15 had resolution of clinical signs and values less than 200 μg/L. Serum canine pancreatic lipase immunoreactivity concentrations were not significantly correlated with clinical gastrointestinal disease, neurolocalisation or the preadmission administration of corticosteroids or non-steroidal anti-inflammatory drugs. CLINICAL SIGNIFICANCE These results suggest that serum canine pancreatic lipase immunoreactivity concentrations are significantly elevated in dogs with intervertebral disc herniation.
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Affiliation(s)
- R O Schueler
- Veterinary Neurology and Rehabilitation Center, Westminster, Maryland, 21158, USA
| | - G White
- Fresno Veterinary Specialty and Emergency Center, Fresno, California, 93710, USA
| | - R L Schueler
- Veterinary Neurology and Rehabilitation Center, Westminster, Maryland, 21158, USA
| | - J M Steiner
- Department of Small Animal Clinical Sciences, Texas A&M University, College Station, Texas, 77843, USA
| | - A Wassef
- Fresno Veterinary Specialty and Emergency Center, Fresno, California, 93710, USA
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11
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Neural Regulation of Pancreatic Cancer: A Novel Target for Intervention. Cancers (Basel) 2015; 7:1292-312. [PMID: 26193320 PMCID: PMC4586771 DOI: 10.3390/cancers7030838] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2015] [Revised: 07/07/2015] [Accepted: 07/13/2015] [Indexed: 12/16/2022] Open
Abstract
The tumor microenvironment is known to play a pivotal role in driving cancer progression and governing response to therapy. This is of significance in pancreatic cancer where the unique pancreatic tumor microenvironment, characterized by its pronounced desmoplasia and fibrosis, drives early stages of tumor progression and dissemination, and contributes to its associated low survival rates. Several molecular factors that regulate interactions between pancreatic tumors and their surrounding stroma are beginning to be identified. Yet broader physiological factors that influence these interactions remain unclear. Here, we discuss a series of preclinical and mechanistic studies that highlight the important role chronic stress plays as a physiological regulator of neural-tumor interactions in driving the progression of pancreatic cancer. These studies propose several approaches to target stress signaling via the β-adrenergic signaling pathway in order to slow pancreatic tumor growth and metastasis. They also provide evidence to support the use of β-blockers as a novel therapeutic intervention to complement current clinical strategies to improve cancer outcome in patients with pancreatic cancer.
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12
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Chronic stress accelerates pancreatic cancer growth and invasion: a critical role for beta-adrenergic signaling in the pancreatic microenvironment. Brain Behav Immun 2014; 40:40-7. [PMID: 24650449 PMCID: PMC4102665 DOI: 10.1016/j.bbi.2014.02.019] [Citation(s) in RCA: 182] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2013] [Revised: 02/18/2014] [Accepted: 02/28/2014] [Indexed: 12/20/2022] Open
Abstract
Pancreatic cancer cells intimately interact with a complex microenvironment that influences pancreatic cancer progression. The pancreas is innervated by fibers of the sympathetic nervous system (SNS) and pancreatic cancer cells have receptors for SNS neurotransmitters which suggests that pancreatic cancer may be sensitive to neural signaling. In vitro and non-orthotopic in vivo studies showed that neural signaling modulates tumour cell behavior. However the effect of SNS signaling on tumor progression within the pancreatic microenvironment has not previously been investigated. To address this, we used in vivo optical imaging to non-invasively track growth and dissemination of primary pancreatic cancer using an orthotopic mouse model that replicates the complex interaction between pancreatic tumor cells and their microenvironment. Stress-induced neural activation increased primary tumor growth and tumor cell dissemination to normal adjacent pancreas. These effects were associated with increased expression of invasion genes by tumor cells and pancreatic stromal cells. Pharmacological activation of β-adrenergic signaling induced similar effects to chronic stress, and pharmacological β-blockade reversed the effects of chronic stress on pancreatic cancer progression. These findings indicate that neural β-adrenergic signaling regulates pancreatic cancer progression and suggest β-blockade as a novel strategy to complement existing therapies for pancreatic cancer.
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13
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Zaccone G, Fudge DS, Winegard TM, Capillo G, Kuciel M, Funakoshi K, Lauriano ER. Confocal imaging and phylogenetic considerations of the subcutaneous neurons in the Atlantic hagfishMyxine glutinosa. ACTA ZOOL-STOCKHOLM 2014. [DOI: 10.1111/azo.12068] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Giacomo Zaccone
- Department of Environmental Science, Territory, Food and Health Security (S.A.S.T.A.S.); Viale Stagno d'Alcontres 31 I-98166 Messina Italy
| | - Douglas S. Fudge
- Department of Integrative Biology; University of Guelph; Guelph ON N1G-2W1 Canada
| | - Timothy M. Winegard
- Department of Integrative Biology; University of Guelph; Guelph ON N1G-2W1 Canada
| | - Gioele Capillo
- Department of Environmental Science, Territory, Food and Health Security (S.A.S.T.A.S.); Viale Stagno d'Alcontres 31 I-98166 Messina Italy
| | - Michal Kuciel
- Department of Comparative Anatomy; Institute of Zoology; Jagiellonian University; Gronostajowa 9 30-387 Krakow Poland
| | - Kengo Funakoshi
- Department of Neuroanatomy; Yokohama City University School of Medicine; 22-2 Seto Kanazawa Ward Yokohama Kanagawa Prefecture 236-0027 Japan
| | - Eugenia Rita Lauriano
- Department of Environmental Science, Territory, Food and Health Security (S.A.S.T.A.S.); Viale Stagno d'Alcontres 31 I-98166 Messina Italy
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Márquez L, Fuentes J. In vitro characterization of acid secretion in the gilthead sea bream (Sparus aurata) stomach. Comp Biochem Physiol A Mol Integr Physiol 2013; 167:52-8. [PMID: 24126049 DOI: 10.1016/j.cbpa.2013.10.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2013] [Revised: 10/06/2013] [Accepted: 10/07/2013] [Indexed: 01/19/2023]
Abstract
The gastric acid secretion of juvenile Sparus aurata was characterized in Ussing chambers; secretion rates were determined by a pH-stat method at pH5.50 and bioelectrical parameters were measured in current-clamped tissues. The basal secretion equaled to 535±87nmol·cm(-2)·h(-1). Serosal carbachol 100μM produced an increase (ΔJH(+)) of 725±133nmol·cm(-2)·h(-1) from basal secretion, this effect being inhibited by mucosal omeprazole 100μM. Basal secretion was also sensitive to the combination of serosal forskolin (FK) 10μM+serosal isobutylmethylxanthine (IBMX) 100μM (ΔJH(+)=793±239nmol·cm(-2)·h(-1)); this effect was insensitive to mucosal omeprazole 100mM but inhibited by mucosal bafilomycin A1 100nM. The effect of carbachol proceeded within a few minutes (<10min), whereas the effect of FK+IBMX was gradual, taking 40min to reach the maximum. The addition of mucosal gadolinium (Gd(3+)) 100μM, a potent calcium-sensing receptor (CaR) agonist, stimulated the basal secretion (ΔJH(+)=340±81nmol·cm(-2)·h(-1)). The present results indicate that the acid secretion mechanism in the sea bream stomach is regulated by muscarinic and CaR-like receptors, cAMP is implicated in the signal transduction, and at least two proton pumps, a HK-ATPase and a V-ATPase contribute to acid secretion.
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Affiliation(s)
- Lorenzo Márquez
- Núcleo de Investigación en Producción Alimentaria/Escuela de Acuicultura, Facultad de Recursos Naturales, Universidad Católica de Temuco, Avda. Rudecindo Ortega 02950, PO Box 15-D, Temuco, Chile.
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15
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Brosnahan AJ, Vulchanova L, Witta SR, Dai Y, Jones BJ, Brown DR. Norepinephrine potentiates proinflammatory responses of human vaginal epithelial cells. J Neuroimmunol 2013; 259:8-16. [PMID: 23571017 DOI: 10.1016/j.jneuroim.2013.03.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2013] [Revised: 03/11/2013] [Accepted: 03/15/2013] [Indexed: 11/17/2022]
Abstract
The vaginal epithelium provides a barrier to pathogens and recruits immune defenses through the secretion of cytokines and chemokines. Several studies have shown that mucosal sites are innervated by norepinephrine-containing nerve fibers. Here we report that norepinephrine potentiates the proinflammatory response of human vaginal epithelial cells to products produced by Staphylococcus aureus, a pathogen that causes menstrual toxic shock syndrome. The cells exhibit immunoreactivity for catecholamine synthesis enzymes and the norepinephrine transporter. Moreover, the cells secrete norepinephrine and dopamine at low concentrations. These results indicate that norepinephrine may serve as an autocrine modulator of proinflammatory responses in the vaginal epithelium.
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Affiliation(s)
- Amanda J Brosnahan
- Department of Veterinary and Biomedical Sciences, College of Veterinary Medicine, University of Minnesota, 75 Animal Science/Veterinary Medicine, 1988 Fitch Ave, Saint Paul, MN 55108, United States
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16
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Gagnon J, Anini Y. Insulin and norepinephrine regulate ghrelin secretion from a rat primary stomach cell culture. Endocrinology 2012; 153:3646-56. [PMID: 22691550 DOI: 10.1210/en.2012-1040] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Ghrelin is a peptide hormone primarily produced in the previously unidentified X/A endocrine cells of the stomach. Extensive studies have focused on the effects of ghrelin on growth hormone release and appetite regulation. However, the mechanisms regulating ghrelin secretion are less understood. In the present study, we developed a primary culture of newborn rat stomach cells to investigate the mechanisms regulating ghrelin synthesis and secretion. We demonstrated that this cell preparation secretes ghrelin in a regulated manner through the increase of cAMP, intracellular calcium, and activation of protein kinase C. Norepinephrine (NE) (0.1-10 μm) stimulated ghrelin secretion through the β1-adrenergic receptor via increased cAMP and protein kinase A activity, whereas acetylcholine had no effect. Because circulating ghrelin levels were previously shown to be inversely correlated with insulin levels, we investigated the effect of insulin on ghrelin secretion. We first demonstrated that ghrelin cells express the insulin receptor α- and β-subunits. Next, we determined that insulin (1-10 nm) inhibited both basal and NE-stimulated ghrelin secretion, caused an increase in phosphorylated serine-threonine kinase (AKT) and a reduction in intracellular cAMP, but did not alter proghrelin mRNA levels. The inhibitory effect of insulin was blocked by inhibiting phospho-inositol-3 kinase and AKT but not MAPK. Higher dose insulin (100 nm) did not suppress ghrelin secretion, which prompted the investigation of cellular insulin resistance by pretreating the cells with 100 nm insulin for 24 h. This caused a reduction in insulin receptor expression and prevented the insulin-mediated AKT activation and the suppression of ghrelin secretion with no impact on NE-stimulated ghrelin secretion. Our findings highlight the role of the sympathetic nervous system, insulin, and insulin resistance in the regulation of ghrelin secretion.
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Affiliation(s)
- Jeffrey Gagnon
- Department of Obstetrics, Faculty of Medicine,Dalhousie University, Halifax, Nova Scotia, Canada
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17
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Babonis LS, Brischoux F. Perspectives on the convergent evolution of tetrapod salt glands. Integr Comp Biol 2012; 52:245-56. [PMID: 22586069 DOI: 10.1093/icb/ics073] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Since their discovery in 1958, the function of specialized salt-secreting glands in tetrapods has been studied in great detail, and such studies continue to contribute to a general understanding of transport mechanisms of epithelial water and ions. Interestingly, during that same time period, there have been only few attempts to understand the convergent evolution of this tissue, likely as a result of the paucity of taxonomic, embryological, and molecular data available. In this review, we synthesize the available data regarding the distribution of salt glands across extant and extinct tetrapod lineages and the anatomical position of the salt gland in each taxon. Further, we use these data to develop hypotheses about the various factors that have influenced the convergent evolution of salt glands across taxa with special focus on the variation in the anatomical position of the glands and on the molecular mechanisms that may have facilitated the development of a salt gland by co-option of a nonsalt-secreting ancestral gland. It is our hope that this review will stimulate renewed interest in the topic of the convergent evolution of salt glands and inspire future empirical studies aimed at evaluating the hypotheses we lay out herein.
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Affiliation(s)
- Leslie S Babonis
- Kewalo Marine Laboratory, PBRC/University of Hawaii, Honolulu, HI 96813, USA.
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18
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Yúfera M, Moyano FJ, Astola A, Pousão-Ferreira P, Martínez-Rodríguez G. Acidic digestion in a teleost: postprandial and circadian pattern of gastric pH, pepsin activity, and pepsinogen and proton pump mRNAs expression. PLoS One 2012; 7:e33687. [PMID: 22448266 PMCID: PMC3309002 DOI: 10.1371/journal.pone.0033687] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2012] [Accepted: 02/15/2012] [Indexed: 12/26/2022] Open
Abstract
Two different modes for regulation of stomach acid secretion have been described in vertebrates. Some species exhibit a continuous acid secretion maintaining a low gastric pH during fasting. Others, as some teleosts, maintain a neutral gastric pH during fasting while the hydrochloric acid is released only after the ingestion of a meal. Those different patterns seem to be closely related to specific feeding habits. However, our recent observations suggest that this acidification pattern could be modified by changes in daily feeding frequency and time schedule. The aim of this study was to advance in understanding the regulation mechanisms of stomach digestion and pattern of acid secretion in teleost fish. We have examined the postprandial pattern of gastric pH, pepsin activity, and mRNA expression for pepsinogen and proton pump in white seabream juveniles maintained under a light/dark 12/12 hours cycle and receiving only one morning meal. The pepsin activity was analyzed according to the standard protocol buffering at pH 2 and using the actual pH measured in the stomach. The results show how the enzyme precursor is permanently available while the hydrochloric acid, which activates the zymogen fraction, is secreted just after the ingestion of food. Results also reveal that analytical protocol at pH 2 notably overestimates true pepsin activity in fish stomach. The expression of the mRNA encoding pepsinogen and proton pump exhibited almost parallel patterns, with notable increases during the darkness period and sharp decreases just before the morning meal. These results indicate that white seabream uses the resting hours for recovering the mRNA stock that will be quickly used during the feeding process. Our data clearly shows that both daily illumination pattern and feeding time are involved at different level in the regulation of the secretion of digestive juices.
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Affiliation(s)
- Manuel Yúfera
- Instituto de Ciencias Marinas de Andalucía (ICMAN-CSIC). Apartado Oficial, Puerto Real, Cadiz, Spain.
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Smith FM, Croll RP. Autonomic control of the swimbladder. Auton Neurosci 2010; 165:140-8. [PMID: 20817620 DOI: 10.1016/j.autneu.2010.08.002] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2009] [Revised: 06/24/2010] [Accepted: 08/02/2010] [Indexed: 02/05/2023]
Abstract
The swimbladder of teleost fishes is the primary organ for controlling whole-body density, and thus buoyancy. The volume of gas in the swimbladder is adjusted to bring the organism to near neutral buoyancy at a particular depth. Swimbladder morphology varies widely among teleosts, but all species are capable of inflating and deflating this organ under reflex control by the autonomic nervous system, to achieve neutral buoyancy. Here we review the control of effectors within the swimbladder, including acid-secreting cells, vasculature and musculature, that are involved in determining gas volume. This control system is complex. It incorporates the "classical" efferent elements of the autonomic nervous system, the spinal autonomic and cranial autonomic limbs and their neurotransmitters (typically noradrenaline (NA)/adrenaline (ADR), and acetylcholine, respectively), but also non-adrenergic, non-cholinergic neurotransmitters such as peptides, purines and nitric oxide. The detailed patterns of autonomic innervation of swimbladder effectors are not well understood, nor are the relationships of terminals releasing non-adrenergic, non-cholinergic neurotransmitters onto these effectors. Furthermore, in most cases the complement of postjunctional receptor subtypes activated by adrenergic, cholinergic and other neurotransmitters, and the biological effects of these neurochemicals, have not been completely established. In order to clarify some of these issues and to provide insight into basic principles underlying autonomic control of swimbladder function, we propose the zebrafish as a potentially useful model teleost.
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Affiliation(s)
- Frank M Smith
- Department of Anatomy & Neurobiology, Dalhousie University, Halifax, Nova Scotia, Canada
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Olsson C, Holmgren S. Autonomic control of gut motility: a comparative view. Auton Neurosci 2010; 165:80-101. [PMID: 20724224 DOI: 10.1016/j.autneu.2010.07.002] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2010] [Revised: 06/24/2010] [Accepted: 07/06/2010] [Indexed: 12/16/2022]
Abstract
Gut motility is regulated to optimize food transport and processing. The autonomic innervation of the gut generally includes extrinsic cranial and spinal autonomic nerves. It also comprises the nerves contained entirely within the gut wall, i.e. the enteric nervous system. The extrinsic and enteric nervous control follows a similar pattern throughout the vertebrate groups. However, differences are common and may occur between groups and families as well as between closely related species. In this review, we give an overview of the distribution and effects of common neurotransmitters in the vertebrate gut. While the focus is on birds, reptiles, amphibians and fish, mammalian data are included to form the background for comparisons. While some transmitters, like acetylcholine and nitric oxide, show similar distribution patterns and effects in most species investigated, the role of others is more varying. The significance for these differences is not yet fully understood, emphasizing the need for continued comparative studies of autonomic control.
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Affiliation(s)
- Catharina Olsson
- Department of Zoology/Zoophysiology, University of Gothenburg, Sweden.
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