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Jin M, Wang L, Wang H, Han X, Diao Z, Guo W, Yang Z, Ding H, Wang Z, Zhang P, Zhao P, Lv H, Liu W, Wang Z. Disturbed neurovascular coupling in hemodialysis patients. PeerJ 2020; 8:e8989. [PMID: 32328355 PMCID: PMC7166048 DOI: 10.7717/peerj.8989] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Accepted: 03/26/2020] [Indexed: 01/14/2023] Open
Abstract
Background Altered cerebral blood flow (CBF) and amplitude of low-frequency fluctuation (ALFF) have been reported in hemodialysis patients. However, neurovascular coupling impairments, which provide a novel insight into the human brain, have not been reported in hemodialysis patients. Methods We combined arterial spin labeling (ASL) and blood oxygen level dependent (BOLD) techniques to investigate neurovascular coupling alterations and its relationships with demographic and clinical data in 46 hemodialysis patients and 47 healthy controls. To explore regional neuronal activity, ALFF was obtained from resting-state functional MRI. To measure cerebral vascular response, CBF was calculated from ASL. The across-voxel CBF-ALFF correlations for global neurovascular coupling and CBF/ALFF ratio for regional neurovascular coupling were compared between hemodialysis patients and healthy controls. Two-sample t-tests were used to compare the intergroup differences in CBF and ALFF. Multiple comparisons were corrected using a voxel-wise false discovery rate (FDR) method (P < 0.05). Results All hemodialysis patients and healthy controls showed significant across-voxel correlations between CBF and ALFF. Hemodialysis patients showed a significantly reduced global CBF-ALFF coupling (P = 0.0011) compared to healthy controls at the voxel-level. Of note, decreased CBF/ALFF ratio was exclusively located in the bilateral amygdala involved in emotional regulation and cognitive processing in hemodialysis patients. In hemodialysis patients, the decreased CBF (right olfactory cortex, anterior cingulate gyrus and bilateral insula) and ALFF (bilateral precuneus and superior frontal gyrus) were mainly located in the default mode network and salience network-related regions as well as increased CBF in the bilateral thalamus. Conclusions These novel findings reveal that disrupted neurovascular coupling may be a potential neural mechanism in hemodialysis patients.
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Affiliation(s)
- Mei Jin
- Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Liyan Wang
- Department of Nephrology, Faculty of Kidney Diseases, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Hao Wang
- Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Xue Han
- Department of Nephrology, Faculty of Kidney Diseases, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Zongli Diao
- Department of Nephrology, Faculty of Kidney Diseases, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Wang Guo
- Department of Nephrology, Faculty of Kidney Diseases, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Zhenghan Yang
- Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Heyu Ding
- Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Zheng Wang
- Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Peng Zhang
- Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Pengfei Zhao
- Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Han Lv
- Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Wenhu Liu
- Department of Nephrology, Faculty of Kidney Diseases, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Zhenchang Wang
- Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
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Xu R, Zhu X, Chen F, Huang C, Ai K, Wu H, Zhang L, Zhao X. LncRNA XIST/miR-200c regulates the stemness properties and tumourigenicity of human bladder cancer stem cell-like cells. Cancer Cell Int 2018; 18:41. [PMID: 29559853 PMCID: PMC5859407 DOI: 10.1186/s12935-018-0540-0] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Accepted: 03/14/2018] [Indexed: 11/10/2022] Open
Abstract
Background The abnormal expression of non-coding RNAs (ncRNAs), such as microRNAs and long ncRNAs, often contribute to the development of cancers. miR-200c functions as a tumour suppressor that impacts the growth of bladder cancer cells and the epithelial-to-mesenchymal transition (EMT). LncRNA X inactive specific transcript (XIST) is highly expressed in tumour tissues, promotes cancer progression and might act as an miRNA molecular sponge. This study aimed to examine the relationship between lncRNA XIST and miR-200c and to assess their functions in the regulation of the stemness properties and tumourigenicity of human bladder cancer stem cell (BCSC)-like cells. Methods Biological effects including cell clone formation, sphere formation, self-renewal properties and mouse tumourigenesis were examined in BCSC-like cells with miR-200c overexpression or XIST knockdown. Real-time PCR and western blotting were used to detect the expression changing of related factors in BCSC-like cells gene models. Dual luciferase reporter assay was used to examine the changes of XIST and miR-200c expression levels. Results The results indicated that miR-200c overexpression and XIST knockdown could inhibit cell clone formation, self-renewal ability and EMT in BCSC-like cells. miR-200c knockdown could restore the tumour growth inhibition caused by XIST knockdown. Conclusion LncRNA XIST may act as an inhibitor of miR-200c to regulate the stemness properties and tumourigenicity of bladder cancer cells, and our findings might reveal a potential strategy of targeting XIST for bladder cancer therapy.
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Affiliation(s)
- Ran Xu
- Department of Urology, The Second Xiangya Hospital, Central South University, Middle Renmin Road No. 139, Changsha, 410011 Hunan China
| | - Xuan Zhu
- Department of Urology, The Second Xiangya Hospital, Central South University, Middle Renmin Road No. 139, Changsha, 410011 Hunan China
| | - Fangzhi Chen
- Department of Urology, The Second Xiangya Hospital, Central South University, Middle Renmin Road No. 139, Changsha, 410011 Hunan China
| | - Changkun Huang
- Department of Urology, The Second Xiangya Hospital, Central South University, Middle Renmin Road No. 139, Changsha, 410011 Hunan China
| | - Kai Ai
- Department of Urology, The Second Xiangya Hospital, Central South University, Middle Renmin Road No. 139, Changsha, 410011 Hunan China
| | - Hongtao Wu
- Department of Urology, The Second Xiangya Hospital, Central South University, Middle Renmin Road No. 139, Changsha, 410011 Hunan China
| | - Lei Zhang
- Department of Urology, The Second Xiangya Hospital, Central South University, Middle Renmin Road No. 139, Changsha, 410011 Hunan China
| | - Xiaokun Zhao
- Department of Urology, The Second Xiangya Hospital, Central South University, Middle Renmin Road No. 139, Changsha, 410011 Hunan China
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Yasukawa M, Ohbayashi C, Uchiyama T, Kawaguchi T, Kawai N, Tojo T, Taniguchi S. Rapid progression of solitary fibrous tumor after induction of hemodialysis. Oxf Med Case Reports 2017; 2017:omx037. [PMID: 28694973 PMCID: PMC5499212 DOI: 10.1093/omcr/omx037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Revised: 05/10/2017] [Accepted: 05/19/2017] [Indexed: 12/01/2022] Open
Abstract
A 42-year-old male patient presented in 2002 with a solitary fibrous tumor (SFT) arising from the visceral pleura of the right lung. Thoracic surgery was performed to remove the tumor. A second operation to remove a recurrent tumor on the parietal pleura of the right thorax was performed in 2010. A follow-up computed tomography (CT) scan revealed local recurrence in the chest wall. And then a third operation involving en bloc resection of chest wall was performed in 2012. Thereafter, a CT scan in 2015 revealed slow-growing local recurrence. In 2016, he was started on hemodialysis. Two months later he was hospitalized because of chest pain and dyspnea. Imaging showed bilateral massive pleural effusion and dissemination along with left pulmonary metastasis. We report a case of SFT recurrence, which rapidly worsened after induction of hemodialysis. Induction of hemodialysis is potentially challenging that may lead to be in a tumor-bearing condition.
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Affiliation(s)
- Motoaki Yasukawa
- Department of Thoracic and Cardiovascular Surgery, Nara Medical University School of Medicine, Kashihara, Nara, Japan
| | - Chiho Ohbayashi
- Department of Diagnostic Pathology, Nara Medical University School of Medicine, Kashihara, Nara, Japan
| | - Tomoko Uchiyama
- Department of Diagnostic Pathology, Nara Medical University School of Medicine, Kashihara, Nara, Japan
| | - Takeshi Kawaguchi
- Department of Thoracic and Cardiovascular Surgery, Nara Medical University School of Medicine, Kashihara, Nara, Japan
| | - Norikazu Kawai
- Department of Thoracic and Cardiovascular Surgery, Nara Medical University School of Medicine, Kashihara, Nara, Japan
| | - Takashi Tojo
- Department of Thoracic and Cardiovascular Surgery, Nara Medical University School of Medicine, Kashihara, Nara, Japan
| | - Shigeki Taniguchi
- Department of Thoracic and Cardiovascular Surgery, Nara Medical University School of Medicine, Kashihara, Nara, Japan
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