1
|
Miller KJW, Cheng LK, Angeli-Gordon TR, Avci R, Paskaranandavadivel N. The bioelectrical conduction system around the ileocecal junction defined through in vivo high-resolution mapping in rabbits. Am J Physiol Gastrointest Liver Physiol 2022; 323:G318-G330. [PMID: 35916409 DOI: 10.1152/ajpgi.00329.2021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Coordinated contractions across the small and large intestines via the ileocecal junction (ICJ) are critical to healthy gastrointestinal function and are in part governed by myoelectrical activity. In this study, the spatiotemporal characteristics of the bioelectrical conduction across the ICJ and its adjacent regions were quantified in anesthetized rabbits. High-resolution mapping was applied from the terminal ileum (TI) to the sacculus rotundus (SR), across the ICJ and into the beginning of the large intestine at the cecum ampulla coli (AC). Orally propagating slow wave patterns in the SR did not entrain the TI. However, aborally propagating patterns from the TI were able to entrain the SR. Bioelectrical activity was recorded within the ICJ and AC, revealing complex interactions of slow waves, spike bursts, and bioelectrical quiescence. This suggests the involvement of myogenic coordination when regulating motility between the small and large intestines. Mean slow wave frequency between regions did not vary significantly (13.74-17.16 cycles/min). Slow waves in the SR propagated with significantly faster speeds (18.51 ± 1.57 mm/s) compared with the TI (14.05 ± 2.53 mm/s, P = 0.0113) and AC (9.56 ± 1.56 mm/s, P = 0.0001). Significantly higher amplitudes were observed in both the TI (0.28 ± 0.13 mV, P = 0.0167) and SR (0.24 ± 0.08 mV, P = 0.0159) within the small intestine compared with the large intestine AC (0.03 ± 0.01 mV). We hypothesize that orally propagating slow waves facilitate a motor-brake pattern in the SR to limit outflow into the ICJ, similar to those previously observed in other gastrointestinal regions.NEW & NOTEWORTHY Competing slow wave pacemakers were observed in the terminal ileum and sacculus rotundus. Prevalent oral propagation in the sacculus rotundus toward the terminal ileum potentially acts as a brake mechanism limiting outflow. Slow waves and periods of quiescence at the ileocecal junction suggest that activation may depend on the coregulatory flow and distention pathways. Slow waves and spike bursts in the cecum impart a role in the coordination of motility.
Collapse
Affiliation(s)
- Kiara J W Miller
- Auckland Bioengineering Institute, University of Auckland, Auckland, New Zealand
| | - Leo K Cheng
- Auckland Bioengineering Institute, University of Auckland, Auckland, New Zealand.,Riddet Institute, Palmerston North, New Zealand
| | - Timothy R Angeli-Gordon
- Auckland Bioengineering Institute, University of Auckland, Auckland, New Zealand.,Riddet Institute, Palmerston North, New Zealand
| | - Recep Avci
- Auckland Bioengineering Institute, University of Auckland, Auckland, New Zealand
| | | |
Collapse
|
2
|
Gheorghe G, Bacalbasa N, Ceobanu G, Ilie M, Enache V, Constantinescu G, Bungau S, Diaconu CC. Gastrointestinal Stromal Tumors-A Mini Review. J Pers Med 2021; 11:694. [PMID: 34442339 DOI: 10.3390/jpm11080694] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2021] [Revised: 07/17/2021] [Accepted: 07/20/2021] [Indexed: 02/07/2023] Open
Abstract
Gastrointestinal stromal tumors (GISTs) are the most common mesenchymal neoplasms of the gastrointestinal tract. They are potentially malignant, and have an unpredictable evolution. The origin of these tumors is in the interstitial cells of Cajal, which are cells that are interposed between the intramural neurons and the smooth muscle cells of the digestive tract. GISTs are characterized by mutations in the gene c-Kit, but also other mutations, such as those of the platelet-derived growth factor receptor alpha. The most common locations of these tumors are the stomach and small intestine, although they can occur at any level of the digestive tract and occasionally in the omentum, mesentery and peritoneum. Most cases of GISTs are sporadic, and about 5% of cases are part of family genetic syndromes. The correct diagnosis of GIST is determined by histopathological examination and immunohistochemistry. According to histopathology, there are three main types of GISTs: spindle cell type, epithelioid type and mixed type. The therapeutic management of GIST includes surgery, endoscopic treatment and chemotherapy. The prognosis of patients with GIST varies depending on a number of factors, such as risk category, GIST stage, treatment applied and recurrence after treatment.
Collapse
|
3
|
Ricci R, Giustiniani MC, Gessi M, Lanza P, Castri F, Biondi A, Persiani R, Vecchio FM, Risio M. Telocytes are the physiological counterpart of inflammatory fibroid polyps and PDGFRA-mutant GISTs. J Cell Mol Med 2018; 22:4856-4862. [PMID: 30117724 PMCID: PMC6156396 DOI: 10.1111/jcmm.13748] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2018] [Accepted: 05/29/2018] [Indexed: 12/23/2022] Open
Abstract
PDGFRA mutations in the gastrointestinal (GI) tract can cause GI stromal tumour (GIST) and inflammatory fibroid polyp (IFP). Hitherto no cell type has been identified as a physiological counterpart of the latter, while interstitial Cajal cells (ICC) are considered the precursor of the former. However, ICC hyperplasia (ICCH), which strongly supports the ICC role in GIST pathogenesis, has been identified in germline KIT-mutant settings but not in PDGFRA-mutant ones, challenging the precursor role of ICC for PDGFRA-driven GISTs. Telocytes are a recently described interstitial cell type, CD34+/PDGFRA+. Formerly considered fibroblasts, they are found in many organs, including the GI tract where they are thought to be involved in neurotransmission. Alongside IFPs and gastric GISTs, GI wall "fibrosis" has been reported in germline PDGFRA-mutants. Taking the opportunity offered by its presence in a germline PDGFRA-mutant individual, we demonstrate that this lesion is sustained by hyperplastic telocytes, constituting the PDGFRA-mutant counterpart of germline KIT mutation-associated ICCH. Moreover, our findings support a pathogenetic relationship between telocyte hyperplasia and both IFPs and PDGFRA-mutant GISTs. We propose the term "telocytoma" for defining IFP, as it conveys both the pathogenetic (neoplastic) and histotypic ("telocytary") essence of this tumour, unlike IFP, which rather evokes an inflammatory-hyperplastic lesion.
Collapse
Affiliation(s)
- Riccardo Ricci
- Department of Pathology, Università Cattolica del Sacro Cuore, Fondazione Policlinico Universitario "A. Gemelli", Rome, Italy
| | - Maria Cristina Giustiniani
- Department of Pathology, Università Cattolica del Sacro Cuore, Fondazione Policlinico Universitario "A. Gemelli", Rome, Italy
| | - Marco Gessi
- Department of Pathology, Università Cattolica del Sacro Cuore, Fondazione Policlinico Universitario "A. Gemelli", Rome, Italy
| | - Paola Lanza
- Department of Pathology, Università Cattolica del Sacro Cuore, Fondazione Policlinico Universitario "A. Gemelli", Rome, Italy
| | - Federica Castri
- Department of Pathology, Università Cattolica del Sacro Cuore, Fondazione Policlinico Universitario "A. Gemelli", Rome, Italy
| | - Alberto Biondi
- Department of Surgery, Università Cattolica del Sacro Cuore, Fondazione Policlinico Universitario "A. Gemelli", Rome, Italy
| | - Roberto Persiani
- Department of Surgery, Università Cattolica del Sacro Cuore, Fondazione Policlinico Universitario "A. Gemelli", Rome, Italy
| | - Fabio M Vecchio
- Department of Pathology, Università Cattolica del Sacro Cuore, Fondazione Policlinico Universitario "A. Gemelli", Rome, Italy
| | - Mauro Risio
- Department of Pathology, Emeritus, IRCC, Candiolo, Italy
| |
Collapse
|
4
|
Durnin L, Lees A, Manzoor S, Sasse KC, Sanders KM, Mutafova-Yambolieva VN. Loss of nitric oxide-mediated inhibition of purine neurotransmitter release in the colon in the absence of interstitial cells of Cajal. Am J Physiol Gastrointest Liver Physiol 2017; 313:G419-G433. [PMID: 28705804 PMCID: PMC5792210 DOI: 10.1152/ajpgi.00045.2017] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Revised: 06/26/2017] [Accepted: 07/11/2017] [Indexed: 01/31/2023]
Abstract
Regulation of colonic motility depends on the integrity of enteric inhibitory neurotransmission mediated by nitric oxide (NO), purine neurotransmitters, and neuropeptides. Intramuscular interstitial cells of Cajal (ICC-IM) and platelet-derived growth factor receptor-α-positive (PDGFRα+) cells are involved in generating responses to NO and purine neurotransmitters, respectively. Previous studies have suggested a decreased nitrergic and increased purinergic neurotransmission in KitW/KitW-v (W/Wv ) mice that display lesions in ICC-IM along the gastrointestinal tract. However, contributions of NO to these phenotypes have not been evaluated. We used small-chamber superfusion assays and HPLC to measure the spontaneous and electrical field stimulation (EFS)-evoked release of nicotinamide adenine dinucleotide (NAD+)/ADP-ribose, uridine adenosine tetraphosphate (Up4A), adenosine 5'-triphosphate (ATP), and metabolites from the tunica muscularis of human, monkey, and murine colons and circular muscle of monkey colon, and we tested drugs that modulate NO levels or blocked NO receptors. NO inhibited EFS-evoked release of purines in the colon via presynaptic neuromodulation. Colons from W/Wv, Nos1-/- , and Prkg1-/- mice displayed augmented neural release of purines that was likely due to altered nitrergic neuromodulation. Colons from W/Wv mice demonstrated decreased nitrergic and increased purinergic relaxations in response to nerve stimulation. W/Wv mouse colons demonstrated reduced Nos1 expression and reduced NO release. Our results suggest that enhanced purinergic neurotransmission may compensate for the loss of nitrergic neurotransmission in muscles with partial loss of ICC. The interactions between nitrergic and purinergic neurotransmission in the colon provide novel insight into the role of neurotransmitters and effector cells in the neural regulation of gastrointestinal motility.NEW & NOTEWORTHY This is the first study investigating the role of nitric oxide (NO) and intramuscular interstitial cells of Cajal (ICC-IM) in modulating neural release of purines in colon. We found that NO inhibited release of purines in human, monkey, and murine colons and that colons from KitW/KitW-v (W/Wv ) mice, which present with partial loss of ICC-IM, demonstrated augmented neural release of purines. Interactions between nitrergic and purinergic neurotransmission may affect motility in disease conditions with ICC-IM deficiencies.
Collapse
Affiliation(s)
- Leonie Durnin
- 1Department of Physiology and Cell Biology, University of Nevada School of Medicine, Reno, Nevada; and
| | - Andrea Lees
- 1Department of Physiology and Cell Biology, University of Nevada School of Medicine, Reno, Nevada; and
| | - Sheerien Manzoor
- 1Department of Physiology and Cell Biology, University of Nevada School of Medicine, Reno, Nevada; and
| | | | - Kenton M. Sanders
- 1Department of Physiology and Cell Biology, University of Nevada School of Medicine, Reno, Nevada; and
| | | |
Collapse
|
5
|
Yang S, Dong F, Li D, Sun H, Wu B, Sun T, Wang Y, Shen P, Ji F, Zhou D. Persistent distention of colon damages interstitial cells of Cajal through Ca 2+ -ERK-AP-1-miR-34c-SCF deregulation. J Cell Mol Med 2017; 21:1881-1892. [PMID: 28580775 PMCID: PMC5571545 DOI: 10.1111/jcmm.13108] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Accepted: 01/02/2017] [Indexed: 12/30/2022] Open
Abstract
Gastrointestinal motility disorders (GMDs) are attributed to loss of interstitial cells of Cajal (ICC), whose survival and function are deeply dependent on the activation of KIT/SCF signalling. Based on the facts that gastrointestinal distention is common in GMD patients and SCF produced by smooth muscle cells (SMCs) is usually decreased before ICC loss, we considered a possible contribution of persistent gastrointestinal distention/stretch to SCF deficiency. In this study, chronic colonic distention mouse model, diabetic gastrointestinal paresis mouse model, cultured mouse colonic SMCs and colon specimens from Hirschsprung's disease patients were used. The results showed that SCF was clearly decreased in distent colon of mice and patients, and microRNA array and real-time PCR indicated a concomitant increase of miR-34c in distent colon. A negative regulation of miR-34c on SCF expression was confirmed by luciferase reporter assays together with knock-down and overexpression of miR-34c in cultured colonic SMCs. Using EMSA and ChIP assays, we further consolidated that in response to persistent stretch, the transcription factor AP-1/c-Jun was highly activated in colonic SMCs and significantly promoted miR-34c transcription by binding to miR-34c promoter. Knock-down or overexpression of AP-1/c-Jun in cultured colonic SMCs leads to down- or up-regulation of miR-34c, respectively. In addition, the activation of AP-1/c-Jun was through ERK1/2 signalling provoked by Ca2+ overload in colonic SMCs that were subject to persistent stretch. In conclusion, our data demonstrated that persistent distention/stretch on colonic SMCs could suppress SCF production probably through Ca2+ -ERK-AP-1-miR-34c deregulation, resulting in ICC loss or impairment and GMD progress.
Collapse
Affiliation(s)
- Shu Yang
- Department of Histology and Embryology, School of Basic Medical Sciences, Capital Medical University, Beijing, China.,Beijing Key Laboratory of Cancer Invasion and Metastasis Research, Beijing, China
| | - Fang Dong
- Department of Histology and Embryology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Dandan Li
- Department of Histology and Embryology, School of Basic Medical Sciences, Capital Medical University, Beijing, China.,Beijing Key Laboratory of Cancer Invasion and Metastasis Research, Beijing, China
| | - Haimei Sun
- Department of Histology and Embryology, School of Basic Medical Sciences, Capital Medical University, Beijing, China.,Beijing Key Laboratory of Cancer Invasion and Metastasis Research, Beijing, China
| | - Bo Wu
- Department of Histology and Embryology, School of Basic Medical Sciences, Capital Medical University, Beijing, China.,Beijing Key Laboratory of Cancer Invasion and Metastasis Research, Beijing, China
| | - Tingyi Sun
- Department of Histology and Embryology, School of Basic Medical Sciences, Capital Medical University, Beijing, China.,Beijing Key Laboratory of Cancer Invasion and Metastasis Research, Beijing, China
| | - Yaxi Wang
- Department of Histology and Embryology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Ping Shen
- Department of Histology and Embryology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Fengqing Ji
- Department of Histology and Embryology, School of Basic Medical Sciences, Capital Medical University, Beijing, China.,Beijing Key Laboratory of Cancer Invasion and Metastasis Research, Beijing, China
| | - Deshan Zhou
- Department of Histology and Embryology, School of Basic Medical Sciences, Capital Medical University, Beijing, China.,Beijing Key Laboratory of Cancer Invasion and Metastasis Research, Beijing, China
| |
Collapse
|
6
|
Guo T, Li J, Li J, Kong D, Bi C, He Z, Tang D, Jin X, Jin L. Association between hyperpolarization-activated channel in interstitial cells of Cajal and gastrointestinal dysmotility induced by malignant ascites. Oncol Lett 2017; 13:1601-1608. [PMID: 28454297 PMCID: PMC5403200 DOI: 10.3892/ol.2017.5652] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Accepted: 11/03/2016] [Indexed: 12/20/2022] Open
Abstract
Advanced malignant ascites is accompanied by gastrointestinal dysmotility, and patients often feel abdominal pain, abdominal distention, nausea and constipation. Gastrointestinal dysmotility is not only painful for the patients, but it reduces the absorption of nutrients and affects the physical recovery of patients with malignant ascites. It is reported that changes in interstitial cells of Cajal (ICCs) are responsible for the gastrointestinal dysmotility induced by malignant ascites, but the mechanism is not completely understood. The present study observed a significantly decreased expression of ion channels, including hyperpolarization-activated cyclic nucleotide-gated potassium channel 2 (HCN2) and cyclic adenosine monophosphate, in the condition of malignant ascites. Using electrophysiology, it was identified that malignant ascites led to lower amplitude and slower frequency signals in cells of the small intestine. In addition, when ICCs were cultured with malignant ascites in vitro, the expression of HCN2 of ICCs was significantly reduced, and the data of flow cytometry revealed that the Ca2+ concentration of ICCs was also decreased. The results of electron microscopy analysis demonstrated the nuclei of ICCs were pyknotic, and the processes of ICCs were reduced in malignant ascites. The present study suggests the small intestinal dysmotility caused by malignant ascites may be associated with changes in HCN2 of ICCs, which offers a potential therapeutic target for gastrointestinal dysmotility in advanced malignant ascites.
Collapse
Affiliation(s)
- Tieyun Guo
- Department of Histology and Embryology, Basic Medical Science College, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Jiade Li
- Department of Pathology, Basic Medical Science College, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Jing Li
- Department of Pathology, Basic Medical Science College, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Dan Kong
- Department of Gynecology, The Third Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Chunli Bi
- Department of Pathology, Basic Medical Science College, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Zheng He
- Department of Pathology, Basic Medical Science College, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Dai Tang
- Department of Pathology, Basic Medical Science College, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Xiaoming Jin
- Department of Pathology, Basic Medical Science College, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Lianhong Jin
- Department of Histology and Embryology, Basic Medical Science College, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| |
Collapse
|
7
|
Berry R, Miyagawa T, Paskaranandavadivel N, Du P, Angeli TR, Trew ML, Windsor JA, Imai Y, O'Grady G, Cheng LK. Functional physiology of the human terminal antrum defined by high-resolution electrical mapping and computational modeling. Am J Physiol Gastrointest Liver Physiol 2016; 311:G895-G902. [PMID: 27659422 PMCID: PMC5130547 DOI: 10.1152/ajpgi.00255.2016] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Accepted: 09/14/2016] [Indexed: 01/31/2023]
Abstract
High-resolution (HR) mapping has been used to study gastric slow-wave activation; however, the specific characteristics of antral electrophysiology remain poorly defined. This study applied HR mapping and computational modeling to define functional human antral physiology. HR mapping was performed in 10 subjects using flexible electrode arrays (128-192 electrodes; 16-24 cm2) arranged from the pylorus to mid-corpus. Anatomical registration was by photographs and anatomical landmarks. Slow-wave parameters were computed, and resultant data were incorporated into a computational fluid dynamics (CFD) model of gastric flow to calculate impact on gastric mixing. In all subjects, extracellular mapping demonstrated normal aboral slow-wave propagation and a region of increased amplitude and velocity in the prepyloric antrum. On average, the high-velocity region commenced 28 mm proximal to the pylorus, and activation ceased 6 mm from the pylorus. Within this region, velocity increased 0.2 mm/s per mm of tissue, from the mean 3.3 ± 0.1 mm/s to 7.5 ± 0.6 mm/s (P < 0.001), and extracellular amplitude increased from 1.5 ± 0.1 mV to 2.5 ± 0.1 mV (P < 0.001). CFD modeling using representative parameters quantified a marked increase in antral recirculation, resulting in an enhanced gastric mixing, due to the accelerating terminal antral contraction. The extent of gastric mixing increased almost linearly with the maximal velocity of the contraction. In conclusion, the human terminal antral contraction is controlled by a short region of rapid high-amplitude slow-wave activity. Distal antral wave acceleration plays a major role in antral flow and mixing, increasing particle strain and trituration.
Collapse
Affiliation(s)
- Rachel Berry
- 1Auckland Bioengineering Institute, University of Auckland, Aukland, New Zealand;
| | - Taimei Miyagawa
- 2Department of Biomedical Engineering, Tohoku University, Sendai, Japan;
| | | | - Peng Du
- 1Auckland Bioengineering Institute, University of Auckland, Aukland, New Zealand;
| | - Timothy R. Angeli
- 1Auckland Bioengineering Institute, University of Auckland, Aukland, New Zealand;
| | - Mark L. Trew
- 1Auckland Bioengineering Institute, University of Auckland, Aukland, New Zealand;
| | - John A. Windsor
- 3Department of Surgery, University of Auckland, Auckland, New Zealand;
| | - Yohsuke Imai
- 4School of Engineering, Tohoku University, Sendai, Japan; and
| | - Gregory O'Grady
- 1Auckland Bioengineering Institute, University of Auckland, Aukland, New Zealand; ,3Department of Surgery, University of Auckland, Auckland, New Zealand;
| | - Leo K. Cheng
- 1Auckland Bioengineering Institute, University of Auckland, Aukland, New Zealand; ,5Department of Surgery, Vanderbilt University, Nashville, Tennessee
| |
Collapse
|
8
|
Dong F, Yang S, Sun H, Yan J, Guo X, Li D, Zhou D. Persistent mechanical stretch-induced calcium overload and MAPK signal activation contributed to SCF reduction in colonic smooth muscle in vivo and in vitro. J Recept Signal Transduct Res 2016; 37:141-148. [PMID: 27400729 DOI: 10.1080/10799893.2016.1203939] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Gastrointestinal (GI) distention is a common pathological characteristic in most GI motility disorders (GMDs), however, their detail mechanism remains unknown. In this study, we focused on Ca2+ overload of smooth muscle, which is an early intracellular reaction to stretch, and its downstream MAPK signaling and also reduction of SCF in vivo and in vitro. We successfully established colonic dilation mouse model by keeping incomplete colon obstruction for 8 days. The results showed that persistent colonic dilation clearly induced Ca2+ overload and activated all the three MAPK family members including JNK, ERK and p38 in smooth muscle tissues. Similar results were obtained from dilated colon of patients with Hirschsprung's disease and stretched primary mouse colonic smooth muscle cells (SMCs). Furthermore, we demonstrated that persistent stretch-induced Ca2+ overload was originated from extracellular Ca2+ influx and endoplasmic reticulum (ER) Ca2+ release identified by treating with different Ca2+ channel blockers, and was responsible for the persistent activation of MAPK signaling and SCF reduction in colonic SMCs. Our results suggested that Ca2+ overload caused by smooth muscle stretch led to persistent activation of MAPK signaling which might contribute to the decrease of SCF and development of the GMDs.
Collapse
Affiliation(s)
- Fang Dong
- a Department of Histology and Embryology, School of Basic Medical Sciences , Capital Medical University , Beijing , P. R. China
| | - Shu Yang
- a Department of Histology and Embryology, School of Basic Medical Sciences , Capital Medical University , Beijing , P. R. China.,b Beijing Key Laboratory of Cancer Invasion and Metastasis Research , Beijing , P. R. China
| | - Haimei Sun
- a Department of Histology and Embryology, School of Basic Medical Sciences , Capital Medical University , Beijing , P. R. China.,b Beijing Key Laboratory of Cancer Invasion and Metastasis Research , Beijing , P. R. China
| | - Jihong Yan
- a Department of Histology and Embryology, School of Basic Medical Sciences , Capital Medical University , Beijing , P. R. China
| | - Xiaoxia Guo
- c Experimental Teaching Center of Preclinical Medicine , Capital Medical University , Beijing , P. R. China
| | - Dandan Li
- a Department of Histology and Embryology, School of Basic Medical Sciences , Capital Medical University , Beijing , P. R. China
| | - Deshan Zhou
- a Department of Histology and Embryology, School of Basic Medical Sciences , Capital Medical University , Beijing , P. R. China.,b Beijing Key Laboratory of Cancer Invasion and Metastasis Research , Beijing , P. R. China
| |
Collapse
|
9
|
Li J, Kong D, He Y, Wang X, Gao L, Li J, Yan M, Liu D, Wang Y, Zhang L, Jin X. The impact of inflammatory cells in malignant ascites on small intestinal ICCs' morphology and function. J Cell Mol Med 2015; 19:2118-27. [PMID: 26087333 PMCID: PMC4568916 DOI: 10.1111/jcmm.12575] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2014] [Accepted: 02/05/2015] [Indexed: 12/14/2022] Open
Abstract
Malignant ascites is one of the common complication at the late stage of abdominal cancers, which may deteriorate the environment of abdominal cavity and lead to potential damage of functional cells. Interstitial cells of Cajal (ICCs) are mesoderm-derived mesenchymal cells that function normal gastrointestinal motility. The pathological changes of ICCs or the reduced number may lead to the motility disorders of gastrointestinal tract. In this study, through analysis of malignant ascites which were obtained from cancer patients, we found that inflammatory cells, including tumour-infiltrating lymphocytes, accounted for 17.26 ± 1.31% and tumour-associated macrophages, occupied 19.06 ± 2.27% of total cells in the ascites, suggesting these inflammatory cells, in addition to tumour cells, may exert important influence on the tumour environment of abdominal cavity. We further demonstrated that the number of mice ICCs were significant decreased, as well as morphological and functional damage when ICCs were in the simulated tumour microenvironment in vitro. Additionally, we illustrated intestinal myoelectrical activity reduced and irregular with morphological changes of ICCs using the mice model of malignant ascites. In conclusion, our data suggested that inflammatory cells in malignant ascites may damage ICCs of the small intestine and lead to intestinal motility disorders.
Collapse
Affiliation(s)
- Jing Li
- Department of Pathology, Basic Medical Science College, Harbin Medical University, Harbin, China
| | - Dan Kong
- Department of Gynecology, Third Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Yan He
- Department of Pathology, Basic Medical Science College, Harbin Medical University, Harbin, China
| | - Xiuli Wang
- Department of Pathology, Basic Medical Science College, Harbin Medical University, Daqing, China
| | - Lei Gao
- Department of Pathology, Basic Medical Science College, Harbin Medical University, Harbin, China
| | - Jiade Li
- Department of Pathology, Basic Medical Science College, Harbin Medical University, Harbin, China
| | - Meisi Yan
- Department of Pathology, Basic Medical Science College, Harbin Medical University, Harbin, China
| | - Duanyang Liu
- Department of Pathology, Basic Medical Science College, Harbin Medical University, Harbin, China
| | - Yufu Wang
- Department of Orthopedics, Second Clinical Hospital, Harbin Medical University, Harbin, China
| | - Lei Zhang
- Department of Pathology, Basic Medical Science College, Harbin Medical University, Harbin, China
| | - Xiaoming Jin
- Department of Pathology, Basic Medical Science College, Harbin Medical University, Harbin, China
| |
Collapse
|
10
|
Drumm BT, Sergeant GP, Hollywood MA, Thornbury KT, Matsuda TT, Baba A, Harvey BJ, McHale NG. The effect of high [K(+)]o on spontaneous Ca(2+) waves in freshly isolated interstitial cells of Cajal from the rabbit urethra. Physiol Rep 2014; 2:e00203. [PMID: 24744882 PMCID: PMC3967686 DOI: 10.1002/phy2.203] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2013] [Revised: 12/19/2013] [Accepted: 12/23/2013] [Indexed: 11/20/2022] Open
Abstract
Interstitial cells of Cajal (ICC) act as putative pacemaker cells in the rabbit urethra. Pacemaker activity in ICC results from spontaneous global Ca2+ waves that can be increased in frequency by raising external [K+]. The purpose of this study was to elucidate the mechanism of this response. Intracellular [Ca2+] was measured in fluo‐4‐loaded smooth muscle cells (SMCs) and ICC using a Nipkow spinning disk confocal microscope. Increasing [K+]o to 60 mmol/L caused an increase in [Ca2+]i accompanied by contraction in SMCs. Raising [K+]o did not cause contraction in ICC, but the frequency of firing of spontaneous calcium waves increased. Reducing [Ca2+]o to 0 mmol/L abolished the response in both cell types. Nifedipine of 1 μmol/L blocked the response of SMC to high [K+]o, but did not affect the increase in firing in ICC. This latter effect was blocked by 30 μmol/L NiCl2 but not by the T‐type Ca2+ channel blocker mibefradil (300 nmol/L). However, inhibition of Ca2+ influx via reverse‐mode sodium/calcium exchange (NCX) using either 1 μmol/L SEA0400 or 5 μmol/L KB‐R7943 did block the effect of high [K+]o on ICC. These data suggest that high K+ solution increases the frequency of calcium waves in ICC by increasing Ca2+ influx through reverse‐mode NCX. Pacemaker activity in ICC results from spontaneous global Ca2+ waves that can be increased in frequency by raising external [K+]. The experiments described support the hypothesis that high K+ solution increases the frequency of calcium waves in ICC by increasing Ca2+ influx through reverse‐mode NCX.
Collapse
Affiliation(s)
- Bernard T Drumm
- Smooth Muscle Research Centre, Dundalk Institute of Technology, DundalkCo. Louth, Ireland ; Department of Molecular Medicine, Royal College of Surgeons in Ireland, Beaumont Hospital, Dublin 9, Ireland
| | - Gerard P Sergeant
- Smooth Muscle Research Centre, Dundalk Institute of Technology, DundalkCo. Louth, Ireland
| | - Mark A Hollywood
- Smooth Muscle Research Centre, Dundalk Institute of Technology, DundalkCo. Louth, Ireland
| | - Keith T Thornbury
- Smooth Muscle Research Centre, Dundalk Institute of Technology, DundalkCo. Louth, Ireland
| | - Toshio T Matsuda
- Graduate School of Pharmaceutical Sciences, Osaka University, Osaka, Japan
| | - Akemichi Baba
- Graduate School of Pharmaceutical Sciences, Osaka University, Osaka, Japan
| | - Brian J Harvey
- Department of Molecular Medicine, Royal College of Surgeons in Ireland, Beaumont Hospital, Dublin 9, Ireland
| | - Noel G McHale
- Smooth Muscle Research Centre, Dundalk Institute of Technology, DundalkCo. Louth, Ireland
| |
Collapse
|