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Wu J, Lai Y, Wang K, Lai M, Jiang L, Xu Z, Shi J, Gao W. Therapeutic potential of recombinant human basic fibroblast growth factor on postoperative patients with chronic rhinosinusitis with nasal polyps. Clin Otolaryngol 2023; 48:294-304. [PMID: 35810356 DOI: 10.1111/coa.13955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Revised: 05/31/2022] [Accepted: 06/12/2022] [Indexed: 11/28/2022]
Abstract
OBJECTIVES To explore the effect of intranasal administration of recombinant human basic fibroblast growth factor (rh-bFGF) on postoperative chronic rhinosinusitis with nasal polyps (CRSwNP) patients. DESIGN A prospective, randomised, controlled, single-blinded trial. SETTING AND PARTICIPANTS Seventy-five hospitalised patients who met the criteria of primary bilateral CRSwNP were enrolled from March 2020 to January 2021. MAIN OUTCOME MEASURES Visual analogue scale, 22-item Sino-Nasal Outcome Test, Lund-Kennedy (L-K) system and scanning electron microscopy and quantitative real-time polymerase chain reaction. RESULTS Seventy-five patients with CRSwNP were randomly assigned to three groups, and 72 patients completed the 1-month medication regimen and 1-year follow-up. Rh-bFGF nasal-spray and drop application reduced general nasal VAS scores within 2 weeks after endoscopic sinus surgery (ESS) compared to the control group. In contrast, only rh-bFGF nasal-drops reduced SNOT-22 scores at 2 weeks and 1 year compared with the control group. A significant reduction in the endoscopic L-K score was observed in the rh-bFGF nasal-spray and drop group compared with the control group. This is primarily because rh-bFGF promotes cilia growth in the nasal mucosal epithelium after the operation, as illustrated by scanning electron microscopy and expression of CP110, Tap73 and Foxj1 mRNA. For eosinophilic CRSwNP, the general VAS score of rh-bFGF nasal-drops was more obviously reduced compared to the control group after ESS. A similar trend was observed for L-K score. CONCLUSIONS Rh-bFGF nasal-drops and sprays can quickly and effectively relieve postoperative symptoms and improve long-term prognosis of patients with CRSwNP. Moreover, rh-bFGF nasal-drops is also an effective method for postoperative patients with eosinophilic CRSwNP.
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Affiliation(s)
- Jian Wu
- Department of Otorhinolaryngology-Head and Neck Surgery, Guangzhou Red Cross Hospital, Jinan University, Guangzhou, China
| | - Yinyan Lai
- Department of Otorhinolaryngology, The First Affiliated Hospital of Sun Yat-sen University, Sun Yat-sen University, Guangzhou, China
| | - Kanghua Wang
- Department of Otorhinolaryngology, The Seventh Affiliated Hospital of Sun Yat-sen University, Sun Yat-sen University, Shenzhen, China
| | - Ming Lai
- Department of Otorhinolaryngology, Clifford Hospital, Guangzhou, China
| | - Lijie Jiang
- Department of Otorhinolaryngology, The First Affiliated Hospital of Sun Yat-sen University, Sun Yat-sen University, Guangzhou, China
| | - Zhaofeng Xu
- Department of Otorhinolaryngology, The First Affiliated Hospital of Sun Yat-sen University, Sun Yat-sen University, Guangzhou, China
| | - Jianbo Shi
- Department of Otorhinolaryngology-Head and Neck Surgery, Guangzhou Red Cross Hospital, Jinan University, Guangzhou, China.,Department of Otorhinolaryngology, The First Affiliated Hospital of Sun Yat-sen University, Sun Yat-sen University, Guangzhou, China
| | - Wenxiang Gao
- Department of Otorhinolaryngology, The First Affiliated Hospital of Sun Yat-sen University, Sun Yat-sen University, Guangzhou, China
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Zhang X, Zhang H, Gong J, Yu H, Wu D, Hou J, Li M, Sun X. Aging affects the biological activity of fibroblast growth factor (FGF) in gastric epithelial cell, which is partially rescued by uridine. Bioengineered 2022; 13:3724-3738. [PMID: 35105283 PMCID: PMC8974118 DOI: 10.1080/21655979.2022.2029066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Aging has become an irreversible trend in the world, the health problems caused by aging cannot be ignored. The physiological functions of human body begin to decline with aging, the decline of gastrointestinal function caused by aging is an important problem that needs to be resolved. In this work, we evaluated the anti-aging effect of uridine in the senescent gastric epithelial cell model, and found that the aging level of gastric epithelial cell was significantly down-regulated by uridine treatment, uridine could obviously down-regulate the ratio of the SA-β-gal-positive senescent cells. Furthermore, aging-related marker molecules (such as p16 and p21) were also significantly down-regulated under uridine treatment. Additionally, the levels of inflammation and oxidative stress were also significantly reduced by uridine treatment. Next, our further studies the effect of aging on FGF activity on gastric epithelial cell, and found that FGF/FGFR-mediated signaling pathways were significantly down-regulated. However, uridine treatment can not only alleviate the senescence of gastric epithelial cell, but also can partially restore the sensitivity of FGF signaling. Taken together, the current work indicates that uridine shows a good anti-aging effect, which lays a solid foundation for the related research in this filed.
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Affiliation(s)
- Xiaomei Zhang
- School of Pharmacy, Jilin Medical University, Jilin city, Jilin Province, 132013 China
| | - Huifeng Zhang
- School of Pharmacy, Jilin Medical University, Jilin city, Jilin Province, 132013 China
| | - Jingli Gong
- School of Pharmacy, Jilin Medical University, Jilin city, Jilin Province, 132013 China
| | - Huan Yu
- School of Pharmacy, Jilin Medical University, Jilin city, Jilin Province, 132013 China
| | - Di Wu
- School of Pharmacy, Jilin Medical University, Jilin city, Jilin Province, 132013 China
| | - Junyu Hou
- School of Pharmacy, Beihua University, Jilin City, China
| | - Minghui Li
- School of Pharmacy, Beihua University, Jilin City, China
| | - Xin Sun
- School of Pharmacy, Jilin Medical University, Jilin city, Jilin Province, 132013 China
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AbdelAziz EY, Tadros MG, Menze ET. The effect of metformin on indomethacin-induced gastric ulcer: Involvement of nitric oxide/Rho kinase pathway. Eur J Pharmacol 2021; 892:173812. [PMID: 33345855 DOI: 10.1016/j.ejphar.2020.173812] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 12/11/2020] [Accepted: 12/11/2020] [Indexed: 02/06/2023]
Abstract
Gastric ulcer is a very common disease that represent an economic burden. Non-steroidal anti-inflammatory drugs induce ulcer in old patients and in patients with comorbidities. Indomethacin is widely used to induce gastric ulcer in animal models. Diabetic patients are highly susceptible to develop gastric ulcer. Metformin, the first line medication for the treatment of type II diabetes melilites that have many off label uses in non-diabetic patients, has been recently reported to have anti-inflammatory activities. Therefore, this research was conducted to assess the possible healing effects of metformin on gastric ulcers induced by indomethacin in rats. Indomethacin (48 mg/kg) single dose increased stomach acidity, ulcer index and induced histopathological changes. Indomethacin also decreased mucin levels and increased the activity of tumor necrosis factor-α (TNF-α), nuclear factor kappa-B (NF-κB), Rho-associated protein kinas-1 (ROCK-1) and decreased the levels of the protective nitric oxide (NO). After the induction of ulcer, rats were treated by omeprazole (30 mg/kg) or metformin (50, 100 or 200 mg/kg). Omeprazole and metformin were found to decrease stomach acidity and ulcer index, restored the histological features and increased mucin levels. Both also decreased the levels of NF-κB, TNF-α, ROCK-1 and increased NO. Metformin exerted ulcer healing effects comparable to that of omeprazole. This can be attributed, at least partly, to its anti-inflammatory activity and increasing NO levels.
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Affiliation(s)
- Eman Y AbdelAziz
- Pharmacology and Toxicology Department, Faculty of Pharmacy Ain Shams University, Cairo, Egypt
| | - Mariane G Tadros
- Pharmacology and Toxicology Department, Faculty of Pharmacy Ain Shams University, Cairo, Egypt
| | - Esther T Menze
- Pharmacology and Toxicology Department, Faculty of Pharmacy Ain Shams University, Cairo, Egypt.
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4
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Tong L, Wu W. Effects of long non-coding RNA (lncRNA) cancer susceptibility candidate 2c (CASC2c) on proliferation, metastasis and drug resistance of non-small cell lung cancer (NSCLC) cells through ERK1/2 and β-catenin signaling pathways. Pathol Res Pract 2019; 215:152522. [PMID: 31300295 DOI: 10.1016/j.prp.2019.152522] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Revised: 06/03/2019] [Accepted: 06/26/2019] [Indexed: 12/14/2022]
Abstract
OBJECTIVES This study was aimed to investigate the effects of long non-coding RNA (lncRNA) cancer susceptibility candidate 2c (CASC2c) on the proliferation, metastasis and drug resistance of non-small cell lung cancer (NSCLC) cells. METHODS The expression of CASC2c in NSCLC tissues and cell lines was detected by real-time fluorescence quantitative PCR (RT-qPCR). MTT and Transwell assay were used to determine the proliferation and migration of NSCLC cells in the experimental group and the control group respectively. The drug sensitivity test was used to confirm whether increasing the CASC2c expression level could reverse the resistance of NSCLC cells to the chemotherapy drug cisplatin. The effects of CASC2c on the expression levels of p-ERK1/2 and β-catenin were detected by western blot. RESULTS The results of RT-qPCR showed that CASC2c was under-expressed in NSCLC tissues and cells compared with normal adjacent lung tissues cells (p < 0.05). In addition, the CASC2c expression was remarkably correlated with TNM staging, tumor cell differentiation, lymph node metastasis, smoking and other pathological indicators of patients with NSCLC (p < 0.05). MTT and Transwell assay showed that the high-expression of CASC2c significantly reduced the proliferation and migration of NSCLC cells compared to that of the control group (p < 0.05). Western blot assay showed that the high-expressed CASC2c can decrease the expression of phosphorylated-ERK1/2 (p-ERK1/2) and β-catenin. CONCLUSIONS CASC2c was low expressed in NSCLC tissues and cells. What's more, it inhibited the proliferation and migration of NSCLC cells by inhibiting the expression of p-ERK1/2 and β-catenin and reversed NSCLC cells' resistance to the chemotherapy drug cisplatin. Therefore, CASC2c may serve as a new biomarker and therapeutic target in the diagnosis and treatment of NSCLC.
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Affiliation(s)
- Lingfei Tong
- Department of Pharmacy, Jiangxi Provincial People's Hospital, Aiguo Road 152, Donghu, Nanchang, Jiangxi, People's Republic of China.
| | - Wenming Wu
- Department of Pharmacy, Jiangxi Provincial People's Hospital, Aiguo Road 152, Donghu, Nanchang, Jiangxi, People's Republic of China.
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Rodríguez-Mañero M, López-Pardo E, Cordero A, Ruano-Ravina A, Novo-Platas J, Pereira-Vázquez M, Martínez-Gómez Á, García-Seara J, Martínez-Sande JL, Peña-Gil C, Mazón P, García-Acuña JM, Valdés-Cuadrado L, González-Juanatey JR. A prospective study of the clinical outcomes and prognosis associated with comorbid COPD in the atrial fibrillation population. Int J Chron Obstruct Pulmon Dis 2019; 14:371-380. [PMID: 30863038 PMCID: PMC6388772 DOI: 10.2147/copd.s174443] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Background Patients with COPD are at higher risk of presenting with atrial fibrillation (AF). Information about clinical outcomes and optimal medical treatment of AF in the setting of COPD remains missing. We aimed to describe the prevalence of COPD in a sizeable cohort of real-world AF patients belonging to the same healthcare area and to examine the relationship between comorbid COPD and AF prognosis. Methods Prospective analysis performed in a specific healthcare area. Data were obtained from several sources within the “data warehouse of the Galician Healthcare Service” using multiple analytical tools. Statistical analyses were completed using SPSS 19 and STATA 14.0. Results A total of 7,990 (2.08%) patients with AF were registered throughout 2013 in our healthcare area (n=348,985). Mean age was 76.83±10.51 years and 937 (11.7%) presented with COPD. COPD patients had a higher mean CHA2DS2-VASc (4.21 vs 3.46; P=0.02) and received less beta-blocker and more digoxin therapy than those without COPD. During a mean follow-up of 707±103 days, 1,361 patients (17%) died. All-cause mortality was close to two fold higher in the COPD group (28.3% vs 15.5%; P<0.001). Independent predictive factors for all-cause mortality were age, heart failure, diabetes, previous thromboembolic event, dementia, COPD, and oral anticoagulation (OA). There were nonsignificant differences in thromboembolic events (1.7% vs 1.5%; P=0.7), but the rate of hemorrhagic events was significantly higher in the COPD group (3.3% vs 1.9%; P=0.004). Age, valvular AF, OA, and COPD were independent predictive factors for hemorrhagic events. In COPD patients, age, heart failure, vasculopathy, lack of OA, and lack of beta-blocker use were independent predictive factors for all-cause mortality. Conclusion AF patients with COPD have a higher incidence of adverse events with significantly increased rates of all-cause mortality and hemorrhagic events than AF patients without COPD. However, comorbid COPD was not associated with differences in cardiovascular death or stroke rate. OA and beta-blocker treatment presented a risk reduction in mortality while digoxin use exerted a neutral effect.
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Affiliation(s)
- Moisés Rodríguez-Mañero
- Servicio de Cardiología, Hospital Universitario Santiago de Compostela, Santiago de Compostela, Spain, .,IDIS (Instituto para el Desarrollo e Integración de la Salud), Madrid, Spain, .,CIBERCV (Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares), Madrid, Spain,
| | - Estrella López-Pardo
- Xerencia de Xestión Integrada, Hospital Universitario Santiago de Compostela, Santiago de Compostela, Spain
| | - Alberto Cordero
- CIBERCV (Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares), Madrid, Spain, .,Hospital Universitario San Juan de Alicante, Sant Joan d'Alacant, Spain
| | - Alberto Ruano-Ravina
- Xerencia de Xestión Integrada, Hospital Universitario Santiago de Compostela, Santiago de Compostela, Spain
| | - José Novo-Platas
- Xerencia de Xestión Integrada, Hospital Universitario Santiago de Compostela, Santiago de Compostela, Spain
| | - María Pereira-Vázquez
- Servicio de Cardiología, Hospital Universitario Santiago de Compostela, Santiago de Compostela, Spain,
| | - Álvaro Martínez-Gómez
- Servicio de Cardiología, Hospital Universitario Santiago de Compostela, Santiago de Compostela, Spain,
| | - Javier García-Seara
- Servicio de Cardiología, Hospital Universitario Santiago de Compostela, Santiago de Compostela, Spain, .,IDIS (Instituto para el Desarrollo e Integración de la Salud), Madrid, Spain, .,CIBERCV (Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares), Madrid, Spain,
| | - Jose-Luis Martínez-Sande
- Servicio de Cardiología, Hospital Universitario Santiago de Compostela, Santiago de Compostela, Spain, .,IDIS (Instituto para el Desarrollo e Integración de la Salud), Madrid, Spain, .,CIBERCV (Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares), Madrid, Spain,
| | - Carlos Peña-Gil
- Servicio de Cardiología, Hospital Universitario Santiago de Compostela, Santiago de Compostela, Spain, .,IDIS (Instituto para el Desarrollo e Integración de la Salud), Madrid, Spain, .,CIBERCV (Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares), Madrid, Spain,
| | - Pilar Mazón
- Servicio de Cardiología, Hospital Universitario Santiago de Compostela, Santiago de Compostela, Spain, .,IDIS (Instituto para el Desarrollo e Integración de la Salud), Madrid, Spain, .,CIBERCV (Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares), Madrid, Spain,
| | - Jose María García-Acuña
- Servicio de Cardiología, Hospital Universitario Santiago de Compostela, Santiago de Compostela, Spain, .,IDIS (Instituto para el Desarrollo e Integración de la Salud), Madrid, Spain, .,CIBERCV (Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares), Madrid, Spain,
| | - Luis Valdés-Cuadrado
- Xerencia de Xestión Integrada, Hospital Universitario Santiago de Compostela, Santiago de Compostela, Spain.,Servicio de Neumología, Hospital Universitario Santiago de Compostela, Santiago de Compostela, Spain
| | - José Ramón González-Juanatey
- Servicio de Cardiología, Hospital Universitario Santiago de Compostela, Santiago de Compostela, Spain, .,IDIS (Instituto para el Desarrollo e Integración de la Salud), Madrid, Spain, .,CIBERCV (Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares), Madrid, Spain,
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Jeong O, Jung MR, Ryu SY. Impact of Various Types of Comorbidities on the Outcomes of Laparoscopic Total Gastrectomy in Patients with Gastric Carcinoma. J Gastric Cancer 2018; 18:253-263. [PMID: 30276002 PMCID: PMC6160524 DOI: 10.5230/jgc.2018.18.e27] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Revised: 08/22/2018] [Accepted: 09/01/2018] [Indexed: 12/19/2022] Open
Abstract
Purpose With increasing life expectancy, the presence of comorbidities has become a major concern in elderly patients who require surgery. However, little is known about the impact of different comorbidities on the outcomes of laparoscopic total gastrectomy (LTG). In this study, we investigated the impact of comorbidities on postoperative complications in patients undergoing LTG for gastric carcinoma. Materials and Methods We retrospectively reviewed the cases of 303 consecutive patients who underwent LTG for gastric carcinoma between 2005 and 2016. The associations between each comorbidity and postoperative complications were assessed using univariate and multivariate analyses. Results A total of 189 patients (62.4%) had one or more comorbidities. Hypertension was the most common comorbidity (37.0%), followed by diabetes mellitus (17.8%), chronic viral hepatitis (2.6%), liver cirrhosis (2.6%), and pulmonary (27.1%), ischemic heart (3.3%), and cerebrovascular diseases (2.3%). The overall postoperative morbidity and mortality rates were 20.1% and 1.0%, respectively. Patients with pulmonary disease significantly showed higher complication rates than those without comorbidities (32.9% vs. 14.9%, respectively, P=0.003); patient with other comorbidities showed no significant difference in the incidence of LTG-related complications. During univariate and multivariate analyses, pulmonary disease was found to be an independent predictive factor for postoperative complications (odds ratio, 2.14; 95% confidence interval, 1.03-4.64), along with old age and intraoperative bleeding. Conclusions Among the various comorbidities investigated, patients with pulmonary disease had a significantly higher risk of postoperative complications after LTG. Proper perioperative care for optimizing pulmonary function may be required for patients with pulmonary disease.
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Affiliation(s)
- Oh Jeong
- Division of Gastroenterologic Surgery, Department of Surgery, Chonnam National University Hwasun Hospital, Hwasun, Korea
| | - Mi Ran Jung
- Division of Gastroenterologic Surgery, Department of Surgery, Chonnam National University Hwasun Hospital, Hwasun, Korea
| | - Seong Yeob Ryu
- Division of Gastroenterologic Surgery, Department of Surgery, Chonnam National University Hwasun Hospital, Hwasun, Korea
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Xia X, Chiu PWY, Lam PK, Chin WC, Ng EKW, Lau JYW. Secretome from hypoxia-conditioned adipose-derived mesenchymal stem cells promotes the healing of gastric mucosal injury in a rodent model. Biochim Biophys Acta Mol Basis Dis 2017; 1864:178-188. [PMID: 28993190 DOI: 10.1016/j.bbadis.2017.10.009] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2017] [Revised: 08/08/2017] [Accepted: 10/05/2017] [Indexed: 12/17/2022]
Abstract
Studies have indicated that the definitive engraftment and transdifferentiation potential of stem cells do not seem crucial for its property of tissue repair. Our previous study showed that transplantation of adipose-derived mesenchymal stem cells (ADMSCs) enhanced the healing of sutured gastric perforation. This study aimed to investigate the paracrine role of ADMSCs in the experimental gastric mucosal injury. Normoxia-conditioned medium (Nor CM) and hypoxia (HPO) CM were obtained after culturing ADMSCs in 20% O2 and 5% O2 for 48h. Cell migration, proliferation, viability, and angiogenesis in vitro were significantly enhanced upon incubation with CM, especially the HPO CM. Experiments in vivo using a rodent model of gastric ulcer demonstrated that HPO CM treatment significantly accelerated wound healing by suppressing inflammation and promoting neovascularization and re-epithelization. Meanwhile, the infusion of HPO CM activated the COX2-PGE2 axis both in vitro and in vivo. And the upregulation of COX2 was further dependent on the activation of ErK1/2-MAPK pathway. In addition, vascular endothelial growth factor, tissue inhibitors of metalloproteinases-1, and chemokine (C-C motif) ligand 20 (CCL-20) were analyzed as being highly abundant factors secreted by ADMSCs under hypoxic condition. Notably, the blockade of CCL-20 abrogated the HPO CM-induced COX2 signaling in the primary gastric mucosal epithelial cells, while incubation with recombinant CCL-20 increased the expression of COX2. In conclusion, the secretome from hypoxia-conditioned ADMSCs facilitates the repair of gastric mucosal injury through the enhancement of angiogenesis and re-epithelization, as well as the activation of COX2-PGE2 axis with a paracrine activity involving CCL-20 factor.
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Affiliation(s)
- Xianfeng Xia
- Department of Surgery, Institute of Digestive Disease, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong; Chow Yuk Ho Technology Center for Innovative Medicine, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong
| | - Philip Wai Yan Chiu
- Department of Surgery, Institute of Digestive Disease, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong; Chow Yuk Ho Technology Center for Innovative Medicine, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong.
| | - Ping Kuen Lam
- Chow Tai Fook-Cheng Yu Tung Surgical Stem Cell Research Centre, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong
| | - Wai Ching Chin
- Chow Tai Fook-Cheng Yu Tung Surgical Stem Cell Research Centre, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong
| | - Enders Kwok Wai Ng
- Department of Surgery, Institute of Digestive Disease, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong
| | - James Yun Wong Lau
- Department of Surgery, Institute of Digestive Disease, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong; Chow Yuk Ho Technology Center for Innovative Medicine, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong
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Huang KW, Kuan YC, Chi NF, Huang YH, Luo JC, Chien LN. Chronic obstructive pulmonary disease is associated with increased recurrent peptic ulcer bleeding risk. Eur J Intern Med 2017; 37:75-82. [PMID: 27727075 DOI: 10.1016/j.ejim.2016.09.020] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/20/2016] [Revised: 09/06/2016] [Accepted: 09/25/2016] [Indexed: 01/10/2023]
Abstract
BACKGROUND The association between chronic obstructive pulmonary disease (COPD) and the risk of recurrent peptic ulcer bleeding (PUB) remains unclear. In this study, we compared the risk of recurrent PUB between patients with and those without COPD. METHODS Using the Taiwan National Health Insurance Research Database, we first selected patients newly diagnosed with PUB in 2002-2009. Two groups comprising 13,732 COPD cases and 13,732 non-COPD matched controls were created using propensity score matching, thereby making the differences in basic demographics, medication use, and disease conditions between the two groups negligible. Cox proportional hazard regression was used to evaluate the risk of recurrent PUB during the follow-up period. RESULTS The cumulative recurrence rate of PUB was significantly higher in the patients with COPD than in the non-COPD matched controls (2years: 10.8% vs 9.3%; 6years: 18.3% vs 15.7%, P all <0.05), with an adjusted hazard ratio (HR) of 1.17 (95% confidence interval [CI], 1.08-1.26, P<0.001) and 1.19 (95% CI, 1.12-1.26, P<0.001) within 2-year and 6-year follow-ups, respectively. Patients with COPD using steroids were at a marginally higher risk of recurrent PUB than those who did not use steroids. Multivariate stratified analysis revealed similar results in many subgroups. CONCLUSIONS The risk of recurrent PUB is higher in patients with COPD than in patients without COPD.
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Affiliation(s)
- Kuang-Wei Huang
- Division of Gastroenterology, Department of Internal Medicine, Taipei Beitou Health Management Hospital, Taipei, Taiwan; Division of Gastroenterology, Department of Internal Medicine, Shuang Ho Hospital, Taipei Medical University, Taipei, Taiwan
| | - Yi-Chun Kuan
- Department of Neurology, Shuang Ho Hospital, Taipei Medical University, Taipei, Taiwan; Department of Neurology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan; Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei, Taiwan
| | - Nai-Fang Chi
- Department of Neurology, Shuang Ho Hospital, Taipei Medical University, Taipei, Taiwan; Department of Neurology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Yao-Hsien Huang
- Department of Neurology, Shuang Ho Hospital, Taipei Medical University, Taipei, Taiwan; Department of Neurology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Jiing-Chyuan Luo
- Division of Gastroenterology, Department of Internal Medicine, Taipei, Veterans General Hospital, Taipei, Taiwan
| | - Li-Nien Chien
- School of Health Care Administration, College of Management, Taipei Medical University, Taipei, Taiwan.
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Peptidomimetic suppresses proliferation and invasion of gastric cancer cells by fibroblast growth factor 2 signaling cascade blockage. Anticancer Drugs 2016; 27:164-72. [PMID: 26556626 DOI: 10.1097/cad.0000000000000312] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Fibroblast growth factor 2 (FGF2) is closely involved in a variety of tumors, including gastric cancer (GC). FGF2 inhibitors exert good antitumor activity, but no FGF2 inhibitor has been employed for clinical use. To obtain a low-toxicity, stable peptidomimetic (called P29) target to FGF2, the affinity between P29 and FGF2 was detected by surface plasmon resonance. The stability of P29 was measured by high performance liquid chromatography. MTT assay and transwell assay were used to access the proliferative and invasive ability of GC cells, respectively. Western blot assay and flow cytometric analysis were applied to study the mechanism of P29. P29 possessed high affinity with FGF2 and a longer half-life in vitro. P29 suppressed the FGF2-induced proliferation of GC cells. It also inhibited the phosphorylation of FRS2, ERK1/2, and AKT triggered by FGF2 in GC. In addition, P29 blocked GC cell transformation from the G1/G0 phase to the S phase and weakened the invasive capability of GC cells. In this paper, we present a novel FGF2 inhibitor that could exert improved anticancer effect in GC in vitro.
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10
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Luo JC, Peng YL, Chen TS, Huo TI, Hou MC, Huang HC, Lin HC, Lee FY. Clopidogrel inhibits angiogenesis of gastric ulcer healing via downregulation of vascular endothelial growth factor receptor 2. J Formos Med Assoc 2015; 115:764-72. [PMID: 26315480 DOI: 10.1016/j.jfma.2015.07.022] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Revised: 07/25/2015] [Accepted: 07/27/2015] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND/PURPOSE Although clopidogrel does not cause gastric mucosal injury, it does not prevent peptic ulcer recurrence in high-risk patients. We explored whether clopidogrel delays gastric ulcer healing via inhibiting angiogenesis and to elucidate the possible mechanisms. METHODS Gastric ulcers were induced in Sprague Dawley rats, and ulcer healing and angiogenesis of ulcer margin were compared between clopidogrel-treated rats and controls. The expressions of the proangiogenic growth factors and their receptors including basic fibroblast growth factor (bFGF), bFGF receptor (FGFR), vascular endothelial growth factor (VEGF), VEGFR1, VEGFR2, platelet-derived growth factor (PDGF)A, PDGFB, PDGFR A, PDGFR B, and phosphorylated form of mitogenic activated protein kinase pathways over the ulcer margin were compared via western blot and reverse transcription polymerase chain reaction. In vitro, human umbilical vein endothelial cells (HUVECs) were used to elucidate how clopidogrel inhibited growth factors-stimulated HUVEC proliferation. RESULTS The ulcer sizes were significantly larger and the angiogenesis of ulcer margin was significantly diminished in the clopidogrel (2 and 10 mg/kg/d) treated groups. Ulcer induction markedly increased the expression of phosphorylated form of extracellular signal-regulated kinase (pERK), FGFR2, VEGF, VEGFR2, and PDGFRA when compared with those of normal mucosa. Clopidogrel treatment significantly decreased pERK, FGFR2, VEGF, VEGFR2, and PDGFRA expression at the ulcer margin when compared with those of the respective control group. In vitro, clopidogrel (10(-6)M) inhibited VEGF-stimulated (20 ng/mL) HUVEC proliferation, at least, via downregulation of VEGFR2 and pERK. CONCLUSION Clopidogrel inhibits the angiogenesis of gastric ulcer healing at least partially by the inhibition of the VEGF-VEGFR2-ERK signal transduction pathway.
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Affiliation(s)
- Jiing-Chyuan Luo
- Department of Medicine, National Yang-Ming University, School of Medicine, Taipei, Taiwan; Division of Gastroenterology, Taipei Veterans General Hospital, Taipei, Taiwan.
| | - Yen-Ling Peng
- Department of Medicine, National Yang-Ming University, School of Medicine, Taipei, Taiwan; Division of Gastroenterology, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Tseng-Shing Chen
- Department of Medicine, National Yang-Ming University, School of Medicine, Taipei, Taiwan; Division of Gastroenterology, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Teh-Ia Huo
- Division of Gastroenterology, Taipei Veterans General Hospital, Taipei, Taiwan; Institute of Pharmacology, National Yang-Ming University, School of Medicine, Taipei, Taiwan
| | - Ming-Chih Hou
- Department of Medicine, National Yang-Ming University, School of Medicine, Taipei, Taiwan; Endoscopic Center for Diagnosis and Therapy, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan; Healthcare and Management Center, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Hui-Chun Huang
- Department of Medicine, National Yang-Ming University, School of Medicine, Taipei, Taiwan; Division of Gastroenterology, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Han-Chieh Lin
- Department of Medicine, National Yang-Ming University, School of Medicine, Taipei, Taiwan; Division of Gastroenterology, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Fa-Yauh Lee
- Department of Medicine, National Yang-Ming University, School of Medicine, Taipei, Taiwan; Division of Gastroenterology, Taipei Veterans General Hospital, Taipei, Taiwan
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11
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Wu J, Ji J, Weng B, Qiu P, Kanchana K, Wei T, Wang Y, Cai Y, Li X, Liang G. Discovery of novel non-ATP competitive FGFR1 inhibitors and evaluation of their anti-tumor activity in non-small cell lung cancer in vitro and in vivo. Oncotarget 2015; 5:4543-53. [PMID: 24980830 PMCID: PMC4147344 DOI: 10.18632/oncotarget.2122] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Accumulating evidence suggests that high expression of FGFR1 is closely related to the development of lung cancer especially in non-small cell lung cancers (NSCLC), to which non-ATP competitive inhibitors represent an effective therapeutical approach due to their good specificity. Herein, a series of NDGA analogues with the framework of bisaryl-1,4-dien-3-one as novel FGFR1 inhibitors have been designed and screened. Among them Aea4 and Aea25 showed strong FGFR1 ‵inhibition and high selectivity over other receptor kinases. The kinase inhibitory assay in different ATP concentrations and computer-assistant molecular docking showed that the FGFR1 inhibition mode of both Aea4 and Aea25 was non-ATP-competitive. The in vitro and in vivo study on anticancer efficacy of Aea4 and Aea25 against non-small cell lung cancer involves inhibition of cell proliferation, apoptosis induction and cell cycle arrest with no toxicity. Thus, these two novel non-ATP competitive inhibitors derived from NDGA may have a great therapeutic potential in the treatment of NSCLC. This work also provides a structural lead for the design of new non-ATP-competitive FGFR1 inhibitors.
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Affiliation(s)
- Jianzhang Wu
- Chemical Biology Research Center, School of Pharmaceutical Sciences, WenzhouMedical Universtiy, Wenzhou zhejiang China. These Authors contributed equally to this work
| | - Jiansong Ji
- Department of Interventional Radiology, The Fifth Affiliated Hospital of Wenzhou Medical University, Lishui, Zhejiang, China. These Authors contributed equally to this work
| | - Bixia Weng
- Chemical Biology Research Center, School of Pharmaceutical Sciences, WenzhouMedical Universtiy, Wenzhou zhejiang China
| | - Peihong Qiu
- Chemical Biology Research Center, School of Pharmaceutical Sciences, WenzhouMedical Universtiy, Wenzhou zhejiang China
| | - Karvannan Kanchana
- Chemical Biology Research Center, School of Pharmaceutical Sciences, WenzhouMedical Universtiy, Wenzhou zhejiang China
| | - Tao Wei
- Chemical Biology Research Center, School of Pharmaceutical Sciences, WenzhouMedical Universtiy, Wenzhou zhejiang China
| | - Yi Wang
- Chemical Biology Research Center, School of Pharmaceutical Sciences, WenzhouMedical Universtiy, Wenzhou zhejiang China
| | - Yuepiao Cai
- Chemical Biology Research Center, School of Pharmaceutical Sciences, WenzhouMedical Universtiy, Wenzhou zhejiang China
| | - Xiaokun Li
- Chemical Biology Research Center, School of Pharmaceutical Sciences, WenzhouMedical Universtiy, Wenzhou zhejiang China
| | - Guang Liang
- Chemical Biology Research Center, School of Pharmaceutical Sciences, WenzhouMedical Universtiy, Wenzhou zhejiang China
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12
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Zhang X, Lv H, Zhou Q, Elkholi R, Chipuk JE, Reddy MVR, Reddy EP, Gallo JM. Preclinical pharmacological evaluation of a novel multiple kinase inhibitor, ON123300, in brain tumor models. Mol Cancer Ther 2014; 13:1105-16. [PMID: 24568969 DOI: 10.1158/1535-7163.mct-13-0847] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
ON123300 is a low molecular weight multikinase inhibitor identified through a series of screens that supported further analyses for brain tumor chemotherapy. Biochemical assays indicated that ON123300 was a strong inhibitor of Ark5 and CDK4, as well as growth factor receptor tyrosine kinases such as β-type platelet-derived growth factor receptor (PDGFRβ). ON123300 inhibited U87 glioma cell proliferation with an IC(50) 3.4 ± 0.1 μmol/L and reduced phosphorylation of Akt, yet it also unexpectedly induced Erk activation, both in a dose- and time-dependent manner that subsequently was attributed to relieving Akt-mediated C-Raf S259 inactivation and activating a p70S6K-initiated PI3K-negative feedback loop. Cotreatment with the EGFR inhibitor gefitinib produced synergistic cytotoxic effects. Pursuant to the in vitro studies, in vivo pharmacokinetic and pharmacodynamic studies of ON123300 were completed in mice bearing intracerebral U87 tumors following intravenous doses of 5 and 25 mg/kg alone, and also at the higher dose concurrently with gefitinib. ON123300 showed high brain and brain tumor accumulation based on brain partition coefficient values of at least 2.5. Consistent with the in vitro studies, single agent ON123300 caused a dose-dependent suppression of phosphorylation of Akt as well as activation of Erk in brain tumors, whereas addition of gefitinib to the ON123300 regimen significantly enhanced p-Akt inhibition and prevented Erk activation. In summary, ON123300 demonstrated favorable pharmacokinetic characteristics, and future development for brain tumor therapy would require use of combinations, such as gefitinib, that mitigate its Erk activation and enhance its activity.
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Affiliation(s)
- Xiaoping Zhang
- Authors' Affiliations: Departments of Pharmacology and Systems Therapeutics and Oncological Sciences, Icahn School of Medicine at Mount Sinai, New York, New York; and Department of Pharmaceutical Science, University of South Florida, Tampa, Florida
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13
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Evans JR, Schreiber NB, Williams JA, Spicer LJ. Effects of fibroblast growth factor 9 on steroidogenesis and control of FGFR2IIIc mRNA in porcine granulosa cells. J Anim Sci 2014; 92:511-9. [PMID: 24664559 PMCID: PMC10837796 DOI: 10.2527/jas.2013-6989] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
The objectives of this study were to investigate the effects of fibroblast growth factor 9 (FGF9) on hormone-stimulated porcine granulosa cell proliferation and steroid production and to further elucidate the hormonal and developmental control of FGFR2IIIc gene expression in granulosa cells. Porcine ovaries were collected from a local slaughterhouse and granulosa cells were collected from small to medium (1 to 5 mm) follicles for 5 in vitro studies that were conducted. Cells were cultured for 48 h in 5% fetal calf serum plus 5% porcine serum and then treated with various combinations of FSH, IGF-I, FGF9, Sonic hedgehog (SHH), cortisol, PGE2, and/or wingless-type mouse mammary tumor virus integration site family member 5A (WNT5A) in serum-free medium for an additional 24 or 48 h. Medium was collected for analysis of steroid concentration via RIA, or RNA was collected for gene expression analysis of FGFR2IIIc via quantitative reverse transcription PCR. Fibroblast growth factor 9 stimulated (P < 0.05) IGF-I-induced estradiol production in the presence of FSH and testosterone. However, FGF9 had inconsistent effects on progesterone production, stimulating progesterone production in the presence of FSH and testosterone but inhibiting progesterone production in the presence of IGF-I, FSH, and testosterone. Cell numbers were increased (P < 0.05) by FGF9 in the presence of IGF-I and FSH but not in the presence of FSH and absence of IGF-I. For FGFR2IIIc mRNA studies, granulosa cells were treated with FSH, IGF-I, FGF9, SHH, cortisol, PGE2, or WNT5A. Follicle-stimulating hormone alone had no effect (P > 0.10) whereas IGF-I increased (P < 0.05) FGFR2IIIc mRNA abundance. Cortisol, PGE2, SHH, and WNT5A had no effect (P > 0.10) on FGFR2IIIc gene expression whereas FGF9 in the presence of FSH and IGF-I inhibited (P < 0.05) FGFR2IIIc gene expression. In an in vivo study, granulosa cells from large (7 to 14 mm) follicles had greater (P < 0.05) abundance of FGFR2IIIc mRNA than small (1 to 3 mm) or medium (4 to 6 mm) follicles. In conclusion, IGF-I-induced FGFR2IIIc mRNA may be a mechanism for increased responses to FGF9 in FSH plus IGF-I-treated granulosa cells. Fibroblast growth factor 9 and IGF-I may work together as amplifiers of follicular growth and granulosa cell differentiation by stimulating estradiol production and concomitantly stimulating granulosa cell growth in pigs.
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Affiliation(s)
- J R Evans
- Department of Animal Science, Oklahoma State University, Stillwater 74078
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14
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Peng YL, Leu HB, Luo JC, Huang CC, Hou MC, Lin HC, Lee FY. Diabetes is an independent risk factor for peptic ulcer bleeding: a nationwide population-based cohort study. J Gastroenterol Hepatol 2013; 28:1295-9. [PMID: 23488965 DOI: 10.1111/jgh.12190] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 02/26/2013] [Indexed: 12/12/2022]
Abstract
BACKGROUND AND AIMS Diabetic patients reportedly have a higher incidence of peptic ulcer disease. The aim of this study was to investigate if type II diabetic patients have higher risk of developing peptic ulcer bleeding (PUB) and to identify possible risk factors of PUB in diabetic patients. METHODS Using the National Health Insurance Research Database of Taiwan, records of 5699 type II diabetic patients and 11,226 age- and sex-matched non-diabetic patients in a 1:2 ratio were extracted for comparison from a cohort dataset of 1,000,000 randomly sampled subjects. Log-rank test was used to analyze differences in cumulative hazard of PUB between the two groups. Cox proportional hazard regressions were used to evaluate independent risk factors for PUB in all patients and identified risk factors of PUB in type II diabetic patients. RESULTS In a 7-year follow-up period, type II diabetic patients had significantly higher cumulative hazard of PUB than the controls (P < 0.001, log-rank test). By Cox proportional hazard regression analysis, diabetes was independently associated with increased risk of PUB (hazard ratio 1.44, 95% confidence interval 1.11-1.86; P < 0.001) after adjusting for age, sex, comorbidities (e.g. hypertension, coronary heart disease, heart failure, chronic renal disease, cirrhosis, and peptic ulcer disease), and ulcerogenic medication. Age, chronic renal disease, history of peptic ulcer disease, and use of non-steroidal anti-inflammatory drugs were risk factors for PUB in diabetic patients. CONCLUSIONS Type II diabetic patients have significantly higher risk of PUB even after adjustments for possible confounding factors like age, sex, underlying comorbidities, and ulcerogenic medication.
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Affiliation(s)
- Yen-Ling Peng
- Department of Medicine, National Yang-Ming University, School of Medicine, Taipei, Taiwan
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15
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Osaki LH, Gama P. MAPK signaling pathway regulates p27 phosphorylation at threonin 187 as part of the mechanism triggered by early-weaning to induce cell proliferation in rat gastric mucosa. PLoS One 2013; 8:e66651. [PMID: 23762493 PMCID: PMC3676350 DOI: 10.1371/journal.pone.0066651] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2012] [Accepted: 05/10/2013] [Indexed: 12/12/2022] Open
Abstract
During rat postnatal development, gastric cell proliferation and differentiation depend on many elements, which include dietary pattern, hormones, growth factors and their signaling pathways. Among them, EGFR activity is increased through MAPK and Src cascades in response to early weaning that represents the abrupt transition from milk to solid food. We herein investigated the direct involvement of ERK pathway in the control of cell cycle progression during early weaning, and studied the specific role of p27. At 15 days, Wistar rats were separated from dams, fed with powdered chow and daily injected with PD98059 (MEK inhibitor, 300 µg/kg) or 0.5% DMSO (control). By using HE staining and immunohistochemistry for PCNA, we respectively detected mitotic (MI) and proliferative (PI) indices in 18-day-old pups, and observed that both were reduced by PD98059. As cell cycle-related proteins (cyclin E, CDK2, cyclin D1, CDK4, p21 and p27) are involved in proliferative regulation, we compared samples obtained at 17 days in the morning (17 d) and evening (17.5 d). We found that they were not altered after ERK inhibition, but cyclin D1, p21 and p27 levels changed throughout the day in the control group. As p27 activity depends on its integrity, we studied p27 phosphorylation (threonin 187), and observed that ERK inhibition reduced this process. We suggest that MAPK pathway interferes in the regulation of p27 function in the gastric mucosa during early weaning, possibly by controlling its degradation, and altogether this mechanism might contribute to the increase of epithelial proliferation at this condition.
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Affiliation(s)
- Luciana H Osaki
- Department of Cell and Developmental Biology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil.
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16
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Luo JC, Peng YL, Hou MC, Huang KW, Huang HC, Wang YW, Lin HC, Lee FY, Lu CL. The diminished expression of proangiogenic growth factors and their receptors in gastric ulcers of cirrhotic patients. PLoS One 2013; 8:e61426. [PMID: 23620752 PMCID: PMC3631223 DOI: 10.1371/journal.pone.0061426] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2012] [Accepted: 03/09/2013] [Indexed: 11/30/2022] Open
Abstract
Objectives The pathogenesis of the higher occurrence of peptic ulcer disease in cirrhotic patients is complex. Platelets can stimulate angiogenesis and promote gastric ulcer healing. We compared the expressions of proangiogenic growth factors and their receptors in the gastric ulcer margin between cirrhotic patients with thrombocytopenia and those of non-cirrhotic patients to elucidate possible mechanisms. Methods Eligible cirrhotic patients (n = 55) and non-cirrhotic patients (n = 55) who had gastric ulcers were enrolled. Mucosa from the gastric ulcer margin and non-ulcer areas were sampled and the mRNA expressions of the proangiogenic growth factors (vascular endothelial growth factor [VEGF], platelet derived growth factor [PDGF], basic fibroblast growth factor [bFGF]) and their receptors (VEGFR1, VEGFR2, PDGFRA, PDGFRB, FGFR1, FGFR2) were measured and compared. Platelet count and the expressions of these growth factors and their receptors were correlated with each other. Results The two groups were comparable in terms of gender, ulcer size and infection rate of Helicobacter pylori. However, the cirrhotic group were younger in age, had a lower platelet count than those in the non-cirrhotic group (p<0.05). The cirrhotic patients had diminished mRNA expressions of PDGFB, VEGFR2, FGFR1, and FGFR2 in gastric ulcer margin when compared with those of the non-cirrhotic patients (p<0.05). Diminished expressions of PDGFB and VEGFR2, FGFR1, and FGFR2 were well correlated with the degree of thrombocytopenia in these cirrhotic patients (ρ>0.5, p<0.001). Conclusions Our findings implied that diminished activity of proangiogenic factors and their receptors may contribute to the pathogenesis of gastric ulcers in cirrhotic patients.
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MESH Headings
- Angiogenesis Inducing Agents/metabolism
- Demography
- Female
- Fibroblast Growth Factor 2/genetics
- Fibroblast Growth Factor 2/metabolism
- Gene Expression Regulation
- Humans
- Intercellular Signaling Peptides and Proteins/blood
- Intercellular Signaling Peptides and Proteins/genetics
- Intercellular Signaling Peptides and Proteins/metabolism
- Liver Cirrhosis/complications
- Liver Cirrhosis/genetics
- Male
- Middle Aged
- Platelet Count
- Platelet-Derived Growth Factor/genetics
- Platelet-Derived Growth Factor/metabolism
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Receptor, Fibroblast Growth Factor, Type 1/genetics
- Receptor, Fibroblast Growth Factor, Type 1/metabolism
- Receptor, Fibroblast Growth Factor, Type 2/genetics
- Receptor, Fibroblast Growth Factor, Type 2/metabolism
- Receptor, Platelet-Derived Growth Factor alpha/genetics
- Receptor, Platelet-Derived Growth Factor alpha/metabolism
- Receptor, Platelet-Derived Growth Factor beta/genetics
- Receptor, Platelet-Derived Growth Factor beta/metabolism
- Receptors, Cell Surface/genetics
- Receptors, Cell Surface/metabolism
- Stomach Ulcer/blood
- Stomach Ulcer/complications
- Stomach Ulcer/genetics
- Vascular Endothelial Growth Factor A/genetics
- Vascular Endothelial Growth Factor A/metabolism
- Vascular Endothelial Growth Factor Receptor-1/genetics
- Vascular Endothelial Growth Factor Receptor-1/metabolism
- Vascular Endothelial Growth Factor Receptor-2/genetics
- Vascular Endothelial Growth Factor Receptor-2/metabolism
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Affiliation(s)
- Jiing-Chyuan Luo
- Department of Medicine, National Yang-Ming University, School of Medicine, Taipei, Taiwan.
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Torashima Y, Levin DE, Barthel ER, Speer AL, Sala FG, Hou X, Grikscheit TC. Fgf10 overexpression enhances the formation of tissue-engineered small intestine. J Tissue Eng Regen Med 2013; 10:132-9. [PMID: 23468377 DOI: 10.1002/term.1720] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2012] [Revised: 10/30/2012] [Accepted: 01/05/2013] [Indexed: 12/26/2022]
Abstract
Short bowel syndrome (SBS) is a morbid and mortal condition characterized in most patients by insufficient intestinal surface area. Current management strategies are inadequate, but tissue-engineered small intestine (TESI) offers a potential therapy. A barrier to translation of TESI is the generation of scalable mucosal surface area to significantly increase nutritional absorption. Fibroblast growth factor 10 (Fgf10) is a critical growth factor essential for the development of the gastrointestinal tract. We hypothesized that overexpression of Fgf10 would improve the generation of TESI. Organoid units, the multicellular donor tissue that forms TESI, were derived from Rosa26(rtTA/+), tet(o)Fgf10/(-) or Fgf10(Mlc-nlacZ-v24) (hereafter called Fgf10(lacZ)) mice. These were implanted into the omentum of NOD/SCID γ-chain-deficient mice and induced with doxycycline in the case of tet(o)Fgf10/(-). Resulting TESI were explanted at 4 weeks and studied by histology, quantitative RT-PCR and immunofluorescence. Four weeks after implantation, Fgf10 overexpressing TESI was larger and weighed more than the control tissues. Within the mucosa, the villus height was significantly longer and crypts contained a greater percentage of proliferating epithelial cells. A fully differentiated intestinal epithelium with enterocytes, goblet cells, enteroendocrine cells and Paneth cells was identified in the Fgf10-overexpressing TESI, comparable to native small intestine. β-Galactosidase expression was found in both the epithelium and the mesenchyme of the TESI derived from the Fgf10(LacZ) duodenum. However, this was not the case with TESI generated from jejunum and ileum. We conclude that Fgf10 enhances the formation of TESI.
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Affiliation(s)
| | | | | | | | | | | | - Tracy C Grikscheit
- Children's Hospital Los Angeles, Saban Research Institute, Keck School of Medicine of the University of Southern California, Los Angeles, CA, USA
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Luo JC, Huo TI, Hou MC, Lin HY, Li CP, Lin HC, Chang FY, Lee FY. Clopidogrel delays gastric ulcer healing in rats. Eur J Pharmacol 2012; 695:112-9. [PMID: 22975710 DOI: 10.1016/j.ejphar.2012.07.054] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2012] [Revised: 07/10/2012] [Accepted: 07/27/2012] [Indexed: 01/05/2023]
Abstract
Clopidogrel is not safe enough for the gastric mucosa in patients with high risk of peptic ulcer. This study aimed to explore if clopidogrel delays gastric ulcer healing and elucidate the involved mechanisms. Gastric ulcer was induced in rats and the ulcer size, mucosal epithelial cell proliferation of the ulcer margin, expression of growth factors [epidermal growth factor (EGF), basic fibroblast growth factor] and their receptors, and signal transduction pathways for cell proliferation were measured and compared between the clopidogrel-treated group and untreated controls. For the in vitro part, rat gastric mucosal epithelial cell line (RGM-1 cells) was used to establish EGF receptor over-expressed cells. Cell proliferation and molecular change under EGF treatment (10ng/ml) with and without clopidogrel (10(-6)M) were demonstrated. Ulcer size was significantly larger in the clopidogrel-treated group compared to the control and mucosal epithelial cell proliferation of the ulcer margin was significantly decreased in the clopidogrel-treated group (P<0.05). Clopidogrel (2mg and 10mg/kg/day) significantly decreased ulcer-induced gastric epithelial cell proliferation and ulcer-stimulated expressions of EGF receptor and phosphorylated extracellular signal-regulated kinase (PERK) at the ulcer margin (P<0.05). Clopidogrel (10(-6)M) also inhibited EGF-stimulated EGF receptor, PERK expression, and cell proliferation in RGM-1 cells (P<0.05), and caused much less inhibition of EGF-stimulated cell proliferation in EGF receptor over-expressed RGM-1 cells than in RGM-1 cells (22% vs. 32% reduction). In conclusion, clopidogrel delays gastric ulcer healing in rats via inhibiting gastric epithelial cell proliferation, at least by inhibition of the EGF receptor-ERK signal transduction pathway.
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Affiliation(s)
- Jiing-Chyuan Luo
- Department of Medicine, National Yang-Ming University, School of Medicine, No. 155 Section 2 Linong Street, Taipei, Taiwan.
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Hou G, Tang M, Yan L, Wang M. Changes of ultrastructure and downregulation of heat shock protein 70 and fibroblast growth factor 2 in gastric mucosa of rats with depressive-like behaviour. Acta Neuropsychiatr 2012; 24:160-5. [PMID: 26953009 DOI: 10.1111/j.1601-5215.2011.00599.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
OBJECTIVE To understand the underlying mechanism of gastric symptoms in patients with depressive disorder. METHODS This study tested in the rat depression model evoked with chronic mild stress whether the microstructure gastric mucosa is injured using scanning electronic microscopy and transmission electronic microscopy (TEM). In addition, the expression of heat shock protein 70 (HSP70) and fibroblast growth factor 2 (FGF2) proteins in the gastric mucosa were measured by Western blotting. RESULTS We found that the gastric epithelial cells were ruptured and the gastric pits were widened in rats with depression. The amount of mucous granules was also reduced in the surface mucous cells. Moreover, parietal cells became active, and the secretory canaliculi were magnified. Expression of HSP70 and FGF2 was reduced in the gastric mucosa. CONCLUSIONS These findings suggested that gastric symptoms in rats with depressive-like behaviour were caused by the injury of the gastric mucosa, AQ1 and HSP70 and FGF2 may be key molecules in the pathogenesis.
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Affiliation(s)
- Gonglin Hou
- Department of psychology, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Mingming Tang
- Department of psychology, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Linlin Yan
- Department of psychology, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Mingming Wang
- Department of psychology, Zhejiang Sci-Tech University, Hangzhou 310018, China
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Huang KW, Luo JC, Leu HB, Lin HC, Lee FY, Chan WL, Lin SJ, Chen JW, Chang FY. Chronic obstructive pulmonary disease: an independent risk factor for peptic ulcer bleeding: a nationwide population-based study. Aliment Pharmacol Ther 2012; 35:796-802. [PMID: 22348540 DOI: 10.1111/j.1365-2036.2012.05028.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2012] [Revised: 01/18/2012] [Accepted: 01/26/2012] [Indexed: 12/22/2022]
Abstract
BACKGROUND Peptic ulcer bleeding remains a major healthcare problem despite decreasing prevalence of peptic ulcer disease. The role of chronic obstructive pulmonary disease (COPD) in the risk of peptic ulcer bleeding has not yet been established. AIM To determine if COPD patients have a higher risk of peptic ulcer bleeding than the general population and to identify the risk factors of peptic ulcer bleeding in COPD patients. METHODS From Taiwan's National Health Insurance research database, 62,876 patients, including 32,682 COPD and 30,194 age-gender-matched non-COPD controls, were recruited. Cox proportional hazard regression was performed to evaluate independent risk factors for ulcer bleeding in all patients and to identify risk factors in COPD patients. RESULTS During the 8-year follow-up, COPD patients had a significant higher rate of peptic ulcer bleeding than the control group (P < 0.001, by log-rank test). By Cox proportional hazard regression analysis, COPD [hazard ratio (HR) 1.93, 95% CI 1.73-2.17] was an independent risk factor after adjusting for age, gender, underlying comorbidities and ulcerogenic medication. Age > 65 years, male, comorbidities of hypertension, diabetes, heart failure, history of peptic ulcer disease, and chronic renal disease and use of nonsteroidal anti-inflammatory drugs were risk factors of ulcer bleeding in COPD patients. CONCLUSION Patients with chronic obstructive pulmonary disease have a higher risk of peptic ulcer bleeding after adjustments for possible confounding factors like underlying comorbidities and ulcerogenic medication.
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Affiliation(s)
- K-W Huang
- Department of Medicine, National Yang-Ming University, School of Medicine, Taipei, Taiwan
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Machado ER, Carlos D, Sorgi CA, Ramos SG, Souza DI, Soares EG, Costa-Cruz JM, Ueta MT, Aronoff DM, Faccioli LH. Dexamethasone effects in the Strongyloides venezuelensis infection in a murine model. Am J Trop Med Hyg 2011; 84:957-66. [PMID: 21633034 DOI: 10.4269/ajtmh.2011.10-0490] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The aim of this study was to investigate the immunomodulatory effects of glucocorticoids on the immune response to Strongyloides venezuelensis in mice. Balb/c mice were infected with S. venezuelensis and treated with Dexamethasone (Dexa) or vehicle. Dexa treatment increased circulating blood neutrophil numbers and inhibited eosinophil and mononuclear cell accumulation in the blood, bronchoalveolar, and peritoneal fluid compared with control animals. Moreover, Dexa decreased tumor necrosis factor-α (TNF-α), interferon-γ (IFN-γ), interleukin-3 (IL-3), IL-4, IL-5, IL-10, and IL-12 production in the lungs and circulating immunoglobulin G1 (IgG1), IgG2a, and IgE antibody levels while increasing the overall parasite burden in the feces and intestine. Dexa treatment enhanced the fertility of female nematodes relative to untreated and infected mice. In summary, the alterations in the immune response induced by Dexa resulted in a blunted, aberrant immune response associated with increased parasite burden. This phenomenon is similar to that observed in S. stercoralis-infected humans who are taking immunosuppressive or antiinflammatory drugs, including corticosteroids.
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Affiliation(s)
- Eleuza R Machado
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Avenida do Café s/n, Ribeirão Preto, SP, Brazil.
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Pasham V, Rotte A, Bhandaru M, Eichenmüller M, Bobbala D, Yang W, Pearce D, Lang F, Pearce D, Lang F. Regulation of gastric acid secretion by the serum and glucocorticoid inducible kinase isoform SGK3. J Gastroenterol 2011; 46:305-17. [PMID: 21113728 PMCID: PMC6049078 DOI: 10.1007/s00535-010-0348-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2010] [Accepted: 10/26/2010] [Indexed: 02/04/2023]
Abstract
BACKGROUND The serum and glucocorticoid inducible kinase isoform SGK3 is ubiquitously expressed and has been shown to participate in the regulation of cell survival and transport. Similar to SGK1 and protein kinase B (PKB/Akt) isoforms, SGK3 may phosphorylate glycogen synthase kinase (GSK) 3α,β, which has recently been shown to participate in the regulation of basal gastric acid secretion. The present study thus explored the role of SGK3 in the regulation of gastric acid secretion. METHODS Experiments were performed in isolated glands from gene-targeted mice lacking functional SGK3 (sgk3-/-) or from their wild-type littermates (sgk3+/+). Utilizing 2',7'-bis-(2-carboxyethyl)-5-(and-6)-carboxyfluorescein, acetoxymethyl ester (BCECF) fluorescence, gastric acid secretion was determined from Na(+)-independent pH recovery (∆pH/min) following an ammonium pulse, which reflects H+/K+ adenosine triphosphatase (ATP) ase activity. RESULTS Cytosolic pH in isolated gastric glands was similar in sgk3-/- and sgk3+/+ mice. ∆pH/min was, however, significantly larger in sgk3-/- than in sgk3+/+ mice. In both genotypes, ∆pH/min was virtually abolished in the presence of the H(+)/K(+) ATPase inhibitor omeprazole (100 μM) and SCH28080 (500 nM). Increase of extracellular K+ concentrations to 35 mM (replacing Na+/NMDG) or treatment with 5 μM forskolin increased ∆pH/min in sgk3+/+ mice to a larger extent than in sgk3-/- mice and abrogated the differences between genotypes. The protein kinase A inhibitor H89 (150 nM) decreased ∆pH/min to similarly low values in both genotypes. CONCLUSIONS SGK3 suppresses gastric acid secretion, an effect presumably mediated by the stimulation of protein kinase A with the subsequent activation of K+ channels.
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Affiliation(s)
| | - Anand Rotte
- Department of Physiology, University of Tübingen, Germany
| | | | | | | | - Wenting Yang
- Department of Physiology, University of Tübingen, Germany
| | - David Pearce
- Department of Medicine (Nephrology), University of California, San Francisco, CA 94122, USA
| | - Florian Lang
- Department of Physiology, University of Tübingen, Germany
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Regulation of basal gastric acid secretion by the glycogen synthase kinase GSK3. J Gastroenterol 2010; 45:1022-32. [PMID: 20552232 DOI: 10.1007/s00535-010-0260-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/23/2010] [Accepted: 05/05/2010] [Indexed: 02/04/2023]
Abstract
BACKGROUND According to previous observations, basal gastric acid secretion is downregulated by phosphoinositol-3-(PI3)-kinase, phosphoinositide-dependent kinase (PDK1), and protein kinase B (PKBβ/Akt2) signaling. PKB/Akt phosphorylates glycogen synthase kinase GSK3. The present study explored whether PKB/Akt-dependent GSK3-phosphorylation modifies gastric acid secretion. METHODS Utilizing 2',7'-bis-(carboxyethyl)-5(6')-carboxyfluorescein (BCECF)-fluorescence, basal gastric acid secretion was determined from Na(+)-independent pH recovery (∆pH/min) following an ammonium pulse, which reflects H(+)/K(+)-ATPase activity. Experiments were performed in gastric glands from gene-targeted mice (gsk3 ( KI )) with PKB/serum and glucocorticoid-inducible kinase (SGK)-insensitive GSKα,β, in which the serines within the PKB/SGK phosphorylation site were replaced by alanine (GSK3α(21A/21A), GSK3β(9A/9A)). RESULTS The cytosolic pH in isolated gastric glands was similar in gsk3 ( KI ) and their wild-type littermates (gsk3 ( WT )). However, ∆pH/min was significantly larger in gsk3 ( KI ) than in gsk3 ( WT ) mice and ∆pH/min was virtually abolished by the H(+)/K(+)-ATPase inhibitor omeprazole (100 μM) in gastric glands from both gsk3 ( KI ) and gsk3 ( WT ). Plasma gastrin levels were lower in gsk3 ( KI ) than in gsk3 ( WT ). Both, an increase of extracellular K(+) concentration to 35 mM [replacing Na(+)/N-methyl-D: -glucamine (NMDG)] and treatment with forskolin (5 μM), significantly increased ∆pH/min to virtually the same value in both genotypes. The protein kinase A (PKA) inhibitor H89 (150 nM) and the H(2)-receptor antagonist ranitidine (100 μM) decreased ∆pH/min in gsk3 ( KI ) but not gsk3 ( WT ) and again abrogated the differences between the genotypes. The protein abundance of phosphorylated but not of total PKA was significantly larger in gsk3 ( KI ) than in gsk3 ( WT ). CONCLUSIONS Basal gastric acid secretion is enhanced by the disruption of PKB/SGK-dependent phosphorylation and the inhibition of GSK3. Thus, the inhibition of GSK3 participates in the signaling of PI3-kinase-dependent downregulation of basal gastric acid secretion.
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Rotte A, Pasham V, Bhandaru M, Eichenmüller M, Yang W, Qadri SM, Kempe DS, Puchchakayala G, Pearce D, Birnbaum MJ, Lang F. Regulation of gastric acid secretion by PKB/Akt2. Cell Physiol Biochem 2010; 25:695-704. [PMID: 20511715 DOI: 10.1159/000315089] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/08/2010] [Indexed: 12/16/2022] Open
Abstract
Pharmacological inhibition of phosphoinositol 3 kinase (PI3K) and partial deficiency of phosphoinositide dependent kinase PDK1 have previously been shown to enhance basal gastric acid secretion. PI3K/PDK1 dependent signaling involves activation of protein kinase B/Akt, which may thus be similarly involved in the regulation of gastric acid secretion. To test that hypothesis, gastric acid secretion was determined in isolated glands from gene targeted mice lacking functional Akt2 (akt2(-/-)) or from their wild type littermates (akt2(+/+)). According to BCECF-fluorescence cytosolic pH in isolated gastric glands was similar in akt2(-/-) and akt2(+/+) mice. Na(+)-independent pH recovery (DeltapH/min) following an ammonium pulse, a measure of H(+)/K(+) ATPase activity, was, however, significantly faster in akt2(-/-) than in akt2(+/+) mice. In both genotypes, DeltapH/min was virtually abolished by H(+)/K(+) ATPase inhibitor omeprazole (100 muM). Increase of extracellular K(+) concentrations to 35 mM (replacing Na(+)) increased DeltapH/min to a significantly larger extent in akt2(+/+) than in akt2(-/-) mice and dissipated the differences between the genotypes. Similarly, treatment with 5 muM forskolin enhanced DeltapH/min significantly only in akt2(+/+) mice and abolished the differences between the genotypes. Conversely, protein kinase A inhibitor H89 (50 nM) decreased DeltapH/min to similarly low values in both genotypes. In conclusion, Akt2 suppresses gastric acid secretion and contributes to or even accounts for the inhibition of gastric acid secretion by PI3K.
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Affiliation(s)
- Anand Rotte
- Department of Physiology, University of Tübingen, D-72076 Tübingen, Germany
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Longmore DK, Batch JA, McMahon SK, Conwell LS. Klebsiella pneumoniae bacteraemia complicating rotavirus gastroenteritis in two infants with glucocorticoid deficiency. J Pediatr Endocrinol Metab 2010; 23:293-5. [PMID: 20480730 DOI: 10.1515/jpem.2010.23.3.293] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Rotavirus gastroenteritis was complicated by Klebsiella Pneumoniae bacteraemia in two infants with glucocorticoid deficient conditions who were treated with 'stress dose' hydrocortisone during their illness. Delayed healing in the context of glucocorticoid administration combined with damage from rotavirus infection may result in increased risk of mucosal invasion by gastrointestinal bacteria and subsequent enteric gram-negative bacteraemia.
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Affiliation(s)
- Danielle K Longmore
- Department of Endocrinology and Diabetes, Royal Children's Hospital, Brisbane, Australia.
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Chi CW. Inhibition of the healing of gastric ulcer by glucocorticoid and its relation to proinflammatory cytokines. J Chin Med Assoc 2009; 72:559-60. [PMID: 19948431 DOI: 10.1016/s1726-4901(09)70429-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
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Luo JC, Cho CH, Ng KM, Hsiang KW, Lu CL, Chen TS, Chang FY, Lin HC, Perng CL, Lee SD. Dexamethasone inhibits tumor necrosis factor-alpha-stimulated gastric epithelial cell migration. J Chin Med Assoc 2009; 72:509-14. [PMID: 19837644 DOI: 10.1016/s1726-4901(09)70419-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
BACKGROUND Cell migration (restitution) occurs in the early phase of gastric ulcer healing. Tumor necrosis factor (TNF)-alpha is overexpressed at the ulcer margin and plays a physiologic role in gastric ulcer healing. Dexamethasone, which is a potent corticosteroid, delays rat gastric ulcer healing. We evaluated whether dexamethasone inhibited TNF-alpha-stimulated gastric epithelial cell migration using a rat normal gastric epithelial cell line (RGM-1). METHODS An artificial wound model was employed to measure cell migration. Western blot was performed to evaluate the possible mechanisms. Intracellular prostaglandin E2 level was measured using an enzyme-linked immunosorbent assay. RESULTS TNF-alpha treatment (10 ng/mL) for 12-48 hours significantly increased RGM-1 cell migration, and TNF-alpha treatment increased cyclooxygenase (COX)-2 protein expression 8 hours later and prostaglandin E2 (PGE2) synthesis 12 hours later compared with control (p < 0.05). Dexamethasone (10(-6) M) significantly inhibited the stimulatory effect of TNF-alpha on RGM-1 cell migration, which was associated with a significant decrease in COX-2 expression and PGE2 level in cells (p < 0.05). CONCLUSION TNF-alpha plays a regulatory role in rat gastric epithelial cell migration and dexamethasone inhibited TNF-alpha-stimulated cell migration, which was associated with a decrease in COX-2 expression and PGE2 formation.
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Affiliation(s)
- Jiing-Chyuan Luo
- Division of Gastroenterology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan, ROC.
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