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Jin CX, Tian J, Yang HH, He Y. A preliminary study of changes in carotid artery elasticity in type 2 diabetes mellitus. Clin Physiol Funct Imaging 2022; 43:181-191. [PMID: 36585747 DOI: 10.1111/cpf.12808] [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] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 12/14/2022] [Accepted: 12/22/2022] [Indexed: 01/01/2023]
Abstract
BACKGROUND Carotid stiffening is found to be present in patients with type 2 diabetes mellitus (T2DM) together with endothelial dysfunction and it remains unclear about the role of carotid elasticity in the development of diabetic vascular damage. The aim of the study was to investigate changes and significance of carotid artery elasticity in diabetic patients with or without microvascular complications using velocity vector imaging (VVI) analysis. METHODS Fifty participants were enrolled and divided into health Control group, the uncomplicated DM (uDM) group and the complicated DM (cDM) group. All of them underwent carotid ultrasound examinations. VVI was used to evaluate the common carotid artery (CCA) elasticity and intima-media thickness (IMT) was also measured. Flow-mediated dilation (FMD) was performed to detect the vascular endothelial function. Then differences and correlations of variables between three groups were compared and analyzed. RESULTS CCA elasticity measured by VVI decreased significantly between three groups (p < 0.05), while FMD decreased significantly only in cDM group (p < 0.01) and only IMT in cDM group was significantly thicker than that of Control group (p < 0.05). Representative VVI variables were independently, negatively related to the known duration and microalbuminuria (p < 0.05). All VVI variables were significantly correlated with FMD (0.5 ≤ |r | <0.8, p < 0.001), and just a small part of VVI variables were significantly correlated with IMT (0.3 ≤ |r | <0.5, p < 0.05). CONCLUSION Compared with FMD, CCA elasticity measured by VVI showed more obvious changes in diabetic patients with different levels of vascular damage and may be considered as an alternative indicator in evaluating arterial status of T2DM.
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Affiliation(s)
- Chun-Xiang Jin
- Department of Ultrasound, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Jing Tian
- Department of Ultrasound, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Hui-Hui Yang
- Department of Ultrasound, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Yu He
- Department of Ultrasound, China-Japan Union Hospital of Jilin University, Changchun, China
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Li H, Yang L, Jin Y, Jin C. Roles of Endothelial Motilin Receptor and Its Signal Transduction Pathway in Motilin-Induced Left Gastric Artery Relaxation in Dogs. Front Physiol 2021; 12:770430. [PMID: 34777026 PMCID: PMC8581264 DOI: 10.3389/fphys.2021.770430] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Accepted: 10/05/2021] [Indexed: 12/04/2022] Open
Abstract
Background: Motilin increases left gastric artery (LGA) blood flow in dogs via the endothelial motilin receptor (MLNR). This article investigates the signaling pathways of endothelial MLNR. Methods: Motilin-induced relaxation of LGA rings was assessed using wire myography. Nitric oxide (NO), and cyclic guanosine monophosphate (cGMP) levels were measured using an NO assay kit and cGMP ELISA kit, respectively. Results: Motilin concentration-dependently (EC50=9.1±1.2×10−8M) relaxed LGA rings precontracted with U46619 (thromboxane A2 receptor agonist). GM-109 (MLNR antagonist) significantly inhibited motilin-induced LGA relaxation and the production of NO and cGMP. N-ethylmaleimide (NEM; G-protein antagonist), U73122 [phospholipase C (PLC) inhibitor], and 2-aminoethyl diphenylborinate [2-APB; inositol trisphosphate (IP3) blocker] partially or completely blocked vasorelaxation. In contrast, chelerythrine [protein kinase C (PKC) inhibitor] and H89 [protein kinase A (PKA) inhibitor] had no such effect. Low-calcium or calcium-free Krebs solutions also reduced vasorelaxation. N-nitro-L-arginine methyl ester [L-NAME; nitric oxide synthase (NOS) inhibitor] and ODQ [soluble guanylyl cyclase (sGC) inhibitor] completely abolished vasodilation and synthesis of NO and cGMP. Indomethacin (cyclooxygenase inhibitor), 18α-glycyrrhetinic acid [18α-GA; myoendothelial gap junction (MEGJ) inhibitor], and K+ channel inhibition through high K+ concentrations or tetraethylammonium (TEA-Cl; KCa channel blocker) partially decreased vasorelaxation, whereas glibenclamide (KATP channel blocker) had no such effect. Conclusion: The current study suggests that motilin-induced LGA relaxation is dependent on endothelial MLNR through the G protein-PLC-IP3 pathway and Ca2+ influx. The NOS-NO-sGC-cGMP pathway, prostacyclin, MEGJ, and K+ channels (especially KCa) are involved in endothelial-dependent relaxation of vascular smooth muscle (VSM) cells.
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Affiliation(s)
- HongYu Li
- Department of Ultrasound, China-Japan Union Hospital of Jilin University, Changchun, China.,Department of Ultrasound, The First Hospital of Jilin University, Changchun, China
| | - LanLan Yang
- Department of Ultrasound, China-Japan Union Hospital of Jilin University, Changchun, China.,Department of Hepatopancreatobiliary Medicine, The Second Hospital of Jilin University, Changchun, China
| | - Ying Jin
- Department of Breast Surgery, The First Hospital of Jilin University, Changchun, China
| | - ChunXiang Jin
- Department of Ultrasound, China-Japan Union Hospital of Jilin University, Changchun, China
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Lin YQ, Jiang B, Li HQ, Jin CX, Wang H. Application of the Hepatic Transit Time (HTT) in Evaluation of Portal Vein Pressure in Gastroesophageal Varices Patients. J Ultrasound Med 2019; 38:2305-2314. [PMID: 30609088 DOI: 10.1002/jum.14924] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2018] [Revised: 12/03/2018] [Accepted: 12/09/2018] [Indexed: 06/09/2023]
Abstract
OBJECTIVES To analyze the clinical significance of using hepatic transit time (HTT) to evaluate portal vein pressure in gastroesophageal varices patients. METHODS For the observation group, we enrolled 50 gastroesophageal varices patients who had received esophagogastric variceal embolization in our hospital between January 2015 and February 2018. Patients without liver disease populated the control group and were recruited during the same time period. All patients underwent contrast-enhanced sonography. In the observation group, free portal pressure (FPP) was detected during esophagogastric variceal embolization with ultrasound guidance. Differences in hepatic artery-hepatic vein transit time (HA-HVTT), portal vein-hepatic vein transit time (PV-HVTT), and parenchyma-hepatic vein transit time (PA-HVTT) were compared between groups. Correlations between HA-HVTT, PV-HVTT, PA-HVTT, and FPP in the observation group were analyzed using the Pearson coefficient and linear regression analysis. RESULTS HA-HVTT (t = 5.078; P < .001), PV-HVTT (t = 12.163; P < .001), and PA-HVTT (t = 2.649; P = .009) within the observation group were significantly lower than those of the control group. The areas under the curve of HTT were 0.771 (HA-HVTT), 0.951 (PV-HVTT), and 0.652 (PA-HVTT), and the sensitivity and specificity of PV-HVTT at 7.99 seconds were 86.0% and 88.0%, respectively. The HA-HVTT (r = -0.799; P < .001), PV-HVTT (r = -0.554; P < .001), and PA-HVTT (r = -0.735; P < .001) negatively correlated to FPP in the observation group. Linear regression analysis showed y = -0.410x + 7.254 (HA-HVTT and FPP), y = -0.335x + 4.983 (PV-HVTT and FPP), and y = -0.566x + 4.997 (PA-HVTT and FPP) in the observation group. CONCLUSION Compared with the control patients, the HTT of patients with portal hypertension-esophagogastric varices was significantly shorter, and showed an inverse relationship with FPP.
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Affiliation(s)
- Yuan-Qiang Lin
- Department of Ultrasound, China-Japan Union Hospital, Jilin University, Changchun, China
| | - Bo Jiang
- Department of General Surgery, Nanhu Hospital, China-Japan Union Hospital, Jilin University, Changchun, China
| | - He-Qun Li
- Department of Ultrasound, China-Japan Union Hospital, Jilin University, Changchun, China
| | - Chun-Xiang Jin
- Department of Ultrasound, China-Japan Union Hospital, Jilin University, Changchun, China
| | - Hui Wang
- Department of Ultrasound, China-Japan Union Hospital, Jilin University, Changchun, China
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Wu XL, Du JR, Wang H, Jin CX, Sui GQ, Yang DY, Lin YQ, Luo Q, Fu P, Li HQ, Teng DK. Comparison and preliminary discussion of the reasons for the differences in diagnostic performance and unnecessary FNA biopsies between the ACR TIRADS and 2015 ATA guidelines. Endocrine 2019; 65:121-131. [PMID: 30830584 DOI: 10.1007/s12020-019-01886-0] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Accepted: 02/25/2019] [Indexed: 01/25/2023]
Abstract
OBJECTIVES (1) To compare the American College of Radiology (ACR) thyroid imaging reporting and data system (TIRADS) and American Thyroid Association (ATA) guidelines for thyroid nodules with regard to diagnostic performance and effectiveness at reducing the number of fine-needle aspiration (FNA) biopsies and to preliminarily discuss the reasons for the differences and (2) to compare the diagnostic performance of the two guidelines in the subgroup of nodules <1 cm in diameter. MATERIALS AND METHODS In the present study, 1000 thyroid nodules in 894 consecutive patients with final diagnoses were included; these thyroid nodules were investigated via FNA biopsies in our hospital. The ultrasound (US) features of the thyroid nodules were reviewed and stratified according to the categories defined by the ACR TIRADS and ATA guidelines. RESULTS Compared with the ACR TIRADS guidelines, the ATA guidelines had a higher sensitivity (93.4% (P < 0.001)) and a larger negative predictive value (NPV) (85.3% (P= 0.034)). Compared with the ATA guidelines, the ACR TIRADS guidelines had a higher specificity (66.0% (P < 0.001)), a greater PPV (73.6% (P= 0.001)), and greater accuracy (75.5% (P= 0.017)). Compared with the ATA guidelines, the ACR TIRADS guidelines resulted in significantly fewer unnecessary FNA biopsies (P= 0.007). CONCLUSIONS This study suggests that both the ACR TIRADS and ATA guidelines have unique strengths with regard to their diagnostic performance. In terms of reducing the number of FNA biopsies, the ACR TIRADS guidelines were superior to the ATA guidelines.
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Affiliation(s)
- Xiao-Li Wu
- Department of Ultrasound, The First Hospital of Jilin University, Changchun, 130000, Jilin, China
| | - Jia-Rui Du
- Department of Ultrasound, China-Japan Union Hospital of Jilin University, Changchun, 130000, Jilin, China
| | - Hui Wang
- Department of Ultrasound, China-Japan Union Hospital of Jilin University, Changchun, 130000, Jilin, China
| | - Chun-Xiang Jin
- Department of Ultrasound, China-Japan Union Hospital of Jilin University, Changchun, 130000, Jilin, China
| | - Guo-Qing Sui
- Department of Ultrasound, China-Japan Union Hospital of Jilin University, Changchun, 130000, Jilin, China
| | - Dong-Yan Yang
- Department of Ultrasound, China-Japan Union Hospital of Jilin University, Changchun, 130000, Jilin, China
| | - Yuan-Qiang Lin
- Department of Ultrasound, China-Japan Union Hospital of Jilin University, Changchun, 130000, Jilin, China
| | - Qiang Luo
- Department of Ultrasound, China-Japan Union Hospital of Jilin University, Changchun, 130000, Jilin, China
| | - Ping Fu
- Department of Ultrasound, China-Japan Union Hospital of Jilin University, Changchun, 130000, Jilin, China
| | - He-Qun Li
- Department of Ultrasound, China-Japan Union Hospital of Jilin University, Changchun, 130000, Jilin, China
| | - Deng-Ke Teng
- Department of Ultrasound, China-Japan Union Hospital of Jilin University, Changchun, 130000, Jilin, China.
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Teng DK, Li HQ, Sui GQ, Lin YQ, Luo Q, Fu P, Du JR, Jin CX, Wang H. Preliminary report of microwave ablation for the primary papillary thyroid microcarcinoma: a large-cohort of 185 patients feasibility study. Endocrine 2019; 64:109-117. [PMID: 30771153 DOI: 10.1007/s12020-019-01868-2] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/31/2018] [Accepted: 02/08/2019] [Indexed: 02/07/2023]
Abstract
PURPOSE To assess the safety and efficacy of microwave ablation (MWA) for primary papillary thyroid microcarcinoma (PTMC) with a large sample of 185 patients. METHODS A total of 185 patients underwent MWA for 206 primary PTMC nodules. They received ultrasound follow-up at 1, 3, 6, and 12 months after MWA and every 6 months thereafter. Nodule volumes were calculated at each follow-up and compared with those before MWA. Additionally, the volume reduction rate (VRR) of the nodules was calculated. Patients' thyroid functions were tested before and 1 month after MWA. RESULTS The mean follow-up time of the 185 patients was 20.7 ± 8.8 months (range 12-36 months). During the follow-up period, the mean volume of the 206 nodules was 100.1 ± 92.9 mm3 (range 3.6-423.9) before MWA, which decreased to 2.2 ± 5.6 mm3 (range 0-20.3 mm3) after MWA (P = 0.000). The mean VRR of the nodules was 98.65 ± 3.60% after MWA (range 83.85-100%). One hundred and seventy four of 206 nodules (84.5%) were fully absorbed. Compared with the preoperative results, no significant variation in thyroid function was observed 1 month after MWA. Thirty-eight patients (20.5%) had different types of complications, ranging from minor to major. Five patients (2.7%) had hoarseness, 11 patients (5.9%) had bleeding, 21 patients (11.4%) had earache or toothache, and one patient had another lesion 1 month after MWA. CONCLUSIONS This preliminary study suggests that MWA is safe and effective in the treatment of primary PTMC and offers a new alternative for clinical treatment.
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Affiliation(s)
- Deng-Ke Teng
- Department of Ultrasound, China-Japan Union Hospital of Jilin University, Changchun, Jilin, 130000, China
| | - He-Qun Li
- Department of Ultrasound, China-Japan Union Hospital of Jilin University, Changchun, Jilin, 130000, China
| | - Guo-Qing Sui
- Department of Ultrasound, China-Japan Union Hospital of Jilin University, Changchun, Jilin, 130000, China
| | - Yuan-Qiang Lin
- Department of Ultrasound, China-Japan Union Hospital of Jilin University, Changchun, Jilin, 130000, China
| | - Qiang Luo
- Department of Ultrasound, China-Japan Union Hospital of Jilin University, Changchun, Jilin, 130000, China
| | - Ping Fu
- Department of Ultrasound, China-Japan Union Hospital of Jilin University, Changchun, Jilin, 130000, China
| | - Jia-Rui Du
- Department of Ultrasound, China-Japan Union Hospital of Jilin University, Changchun, Jilin, 130000, China
| | - Chun-Xiang Jin
- Department of Ultrasound, China-Japan Union Hospital of Jilin University, Changchun, Jilin, 130000, China
| | - Hui Wang
- Department of Ultrasound, China-Japan Union Hospital of Jilin University, Changchun, Jilin, 130000, China.
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Guo F, Jiao D, Sui GQ, Sun LN, Gao YJ, Fu QF, Jin CX. Anticancer effect of YWHAZ silencing via inducing apoptosis and autophagy in gastric cancer cells. Neoplasma 2018; 65:693-700. [PMID: 29940752 DOI: 10.4149/neo_2018_170922n603] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Accepted: 01/05/2018] [Indexed: 11/08/2022]
Abstract
YWHAZ (14-3-3ζ) has been reported to be a prognostic marker for various tumors and play a crucial role in many oncogenic processes, including proliferation, migration and invasion. However, the functional role and mechanism of YWHAZ in gastric cancer (GC) are not in detail and still remain to be studied. In the present study, the endogenous expression of YWHAZ in gastric cancer cell line BGC-823 was silenced by YWHAZ-specific short hairpin RNA (shRNA). Our data showed that YWHAZ silencing resulted in cell cycle arrest in BGC-823 cells. Further, YWHAZ-silenced BGC-823 cells acquired increased apoptosis rate, which was confirmed by increased levels of cleaved caspase-3, cleaved PARP, and Bax, and decreased level of Bcl-2. Suppression of YWHAZ also promoted autophagy, confirming by the upregulation of LC3II /LC3I ratio, and downregulation of p62 level. Moreover, YWHAZ suppression inhibited the activation of PI3K/AKT/mTOR signaling pathway in BGC-823 cells. LY294002 (PI3K/AKT inhibitor, 200 nM) further promoted YWHAZ silencing-induced apoptosis and autophagy in BGC-823 cells, while insulin-like growth factor-1 (IGF-1; PI3K/AKT agonist, 10 ng/ml) had the opposite role. Finally, suppression of YWHAZ inhibited the growth of the xenograft tumor in vivo. This study provides extended evidence that YWHAZ can be a potential therapeutic target for GC.
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Affiliation(s)
- F Guo
- Department of Ultrasound, China-Japan Union Hospital, Jilin University, Changchun, China
| | - D Jiao
- Department of Ultrasound, China-Japan Union Hospital, Jilin University, Changchun, China
| | - G Q Sui
- Department of Ultrasound, China-Japan Union Hospital, Jilin University, Changchun, China
| | - L N Sun
- Department of Ultrasound, China-Japan Union Hospital, Jilin University, Changchun, China
| | - Y J Gao
- Department of Gastrointestinal Surgery, China-Japan Union Hospital, Jilin University, Changchun, China
| | - Q F Fu
- Jilin Provincial Key Laboratory of Surgical Translational Medicine, China-Japan Union Hospital, Jilin University, Changchun, China
| | - C X Jin
- Department of Ultrasound, China-Japan Union Hospital, Jilin University, Changchun, China
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Jin C, Hu Z, He Y. A wide-necked extracranial internal carotid artery saccular aneurysm with ipsilateral proximal compression. J Clin Ultrasound 2017; 45:116-120. [PMID: 27492650 DOI: 10.1002/jcu.22385] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2016] [Accepted: 07/01/2016] [Indexed: 06/06/2023]
Abstract
Extracranial internal carotid artery aneurysms (EICAA) are rare and can elicit various neurologic symptoms. Here, we present a case of a saccular EICAA compressing its proximal parent internal carotid artery (ICA). Ultrasonography demonstrated the proximal ICA stenosis and the "tardus-parvus" Doppler waveform downstream. The patient underwent aneurysmectomy and graft interposition. The histologic analysis highly supported an atypical fibromuscular dysplasia. Although this patient only showed a neck mass, the reduced ipsilateral cerebral blood supply was a potential cause for neurologic symptoms. © 2016 Wiley Periodicals, Inc. J Clin Ultrasound 45:116-120, 2017.
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Affiliation(s)
- ChunXiang Jin
- Department of Ultrasound, The Third Hospital of JiLin University, 126 XianTai street, 130033, ChangChun, China
| | - ZhenZhen Hu
- Department of Radiology, The Third Hospital of JiLin University, 126 XianTai street, 130033, ChangChun, China
| | - Yu He
- Department of Ultrasound, The Third Hospital of JiLin University, 126 XianTai street, 130033, ChangChun, China
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Han LR, Jin CX, Yan J, Han SZ, He XB, Yang XF. Effectiveness of external fixator combined with T-plate internal fixation for the treatment of comminuted distal radius fractures. Genet Mol Res 2015; 14:2912-9. [PMID: 25867441 DOI: 10.4238/2015.march.31.22] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
This study compared the efficacy between external fixator combined with palmar T-plate internal fixation and simple plate internal fixation for the treatment of comminuted distal radius fractures. A total of 61 patients classified as type C according to the AO/ASIF classification underwent surgery for comminuted distal radius fractures. There were 54 and 7 cases of closed and open fractures, respectively. Moreover, 19 patients received an external fixator combined with T-plate internal fixation, and 42 received simple plate internal fixation. All patients were treated successfully during 12-month postoperative follow-up. The follow-up results show that the palmar flexion and dorsiflexion of the wrist, radial height, and palmar angle were significantly better in those treated with the external fixator combined with T-plate compared to those treated with the simple plate only (P < 0.05); however, there were no significant differences in radial-ulnar deviation, wrist range of motion, or wrist function score between groups (P > 0.05). Hence, the effectiveness of external fixator combined with T-plate internal fixation for the treatment of comminuted distal radius fractures was satisfactory. Patients sufficiently recovered wrist, forearm, and hand function. In conclusion, compared to the simple T-plate, the external fixator combined with T-plate internal fixation can reduce the possibility of the postoperative re-shifting of broken bones and keep the distraction of fractures to maintain radial height and prevent radial shortening.
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Affiliation(s)
- L R Han
- Department of Orthopaedics, Liaocheng People's Hospital, Liaocheng, China
| | - C X Jin
- Department of Orthopaedics, Liaocheng People's Hospital, Liaocheng, China
| | - J Yan
- Department of Orthopaedics, Liaocheng People's Hospital, Liaocheng, China
| | - S Z Han
- Department of Orthopaedics, Liaocheng People's Hospital, Liaocheng, China
| | - X B He
- Department of Orthopaedics, Liaocheng People's Hospital, Liaocheng, China
| | - X F Yang
- Department of Orthopaedics, Liaocheng People's Hospital, Liaocheng, China
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Song Y, Yamamoto A, Steward MC, Ko SBH, Stewart AK, Soleimani M, Liu BC, Kondo T, Jin CX, Ishiguro H. Deletion of Slc26a6 alters the stoichiometry of apical Cl-/HCO-3 exchange in mouse pancreatic duct. Am J Physiol Cell Physiol 2012; 303:C815-24. [PMID: 22895259 DOI: 10.1152/ajpcell.00151.2012] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
To define the stoichiometry and molecular identity of the Cl(-)/HCO(3)(-) exchanger in the apical membrane of pancreatic duct cells, changes in luminal pH and volume were measured simultaneously in interlobular pancreatic ducts isolated from wild-type and Slc26a6-null mice. Transepithelial fluxes of HCO(3)(-) and Cl(-) were measured in the presence of anion gradients favoring rapid exchange of intracellular HCO(3)(-) with luminal Cl(-) in cAMP-stimulated ducts. The flux ratio of Cl(-) absorption/HCO(3)(-) secretion was ∼0.7 in wild-type ducts and ∼1.4 in Slc26a6(-/-) ducts where a different Cl(-)/HCO(3)(-) exchanger, most likely SLC26A3, was found to be active. Interactions between Cl(-)/HCO(3)(-) exchange and cystic fibrosis transmembrane conductance regulator (CFTR) in cAMP-stimulated ducts were examined by measuring the recovery of intracellular pH after alkali-loading by acetate prepulse. Hyperpolarization induced by luminal application of CFTRinh-172 enhanced HCO(3)(-) efflux across the apical membrane via SLC26A6 in wild-type ducts but significantly reduced HCO(3)(-) efflux in Slc26a6(-/-) ducts. In microperfused wild-type ducts, removal of luminal Cl(-), or luminal application of dihydro-4,4'-diisothiocyanatostilbene-2,2'-disulphonic acid to inhibit SLC26A6, caused membrane hyperpolarization, which was abolished in Slc26a6(-/-) ducts. In conclusion, we have demonstrated that deletion of Slc26a6 alters the apparent stoichiometry of apical Cl(-)/HCO(3)(-) exchange in native pancreatic duct. Our results are consistent with SLC26A6 mediating 1:2 Cl(-)/HCO(3)(-) exchange, and the exchanger upregulated in its absence, most probably SLC26A3, mediating 2:1 exchange.
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Affiliation(s)
- Ying Song
- Laboratory of Human Nutrition, Nagoya University Graduate School of Medicine, Japan
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Yang HH, He Y, Jin WX, Jin Y, Li HB, Jin CX. Progress in research of occult pancreatobiliary reflux. Shijie Huaren Xiaohua Zazhi 2010; 18:3886-3890. [DOI: 10.11569/wcjd.v18.i36.3886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Increasing knowledge regarding pancreaticobiliary maljunction (PBM) has led researchers to find that pancreatobiliary reflux (flow of pancreatic juice into the biliary tract) occurs not only in PBM patients but also in individuals with a normal pancreaticobiliary junction (occult pancreatobiliary reflux, OPR). The functional disorders of the sphincter of Oddi have been proposed as a possible cause for OPR. Some studies have found that OPR is a high risk factor for gallbladder cancer. The incidence of choledochal stones is higher in patients with OPR than in those without OPR. In this article, we review the progress in research of OPR.
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Hayakawa T, Jin CX, Hirooka Y. Endoscopic ultrasonography of the pancreas: new advances. JOP 2000; 1:46-8. [PMID: 11854557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
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