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Zhang CH, Qin K, Tian SL, Han Y, Xu SY, Shao XY. Identification and Verification of the Ability of Cdk5 to Phosphorylate Deubiquitinating Enzyme BRCC3 In Vitro. Bull Exp Biol Med 2022; 172:701-708. [PMID: 35503584 DOI: 10.1007/s10517-022-05460-z] [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: 06/07/2021] [Indexed: 11/30/2022]
Abstract
It is known that the expression of the deubiquitinating enzyme BRCA1-BRCA2-containing complex subunit 3 (BRCC3) and cyclin-dependent protein kinase 5 (Cdk5) is increased in Parkinson's disease (both are involved in neuroinflammatory response). However, the regulatory mechanism of Cdk5 on the post-translational modification of BRCC3 remains unclear. Here we studied whether Cdk5 phosphorylates BRCC3. Phosphorylation of BRCC3 by Cdk5 was predicted by GPS 5.0 software. His-BRCC3 plasmid was constructed by cloning the BRCC3 gene into pGEX-6P-1 vector, and then His-BRCC3 fusion protein was induced with isopropyl β-d-1-thiogalactopyranoside and purified using His-Tag affinity chromatography purification agarose. Phosphorylation of BRCC3 fusion protein by Cdk5 in vitro was detected by mass spectrometry and Western blotting. The results showed that multiple phosphorylation sites were predicted by GPS 5.0, and the His-BRCC3 fusion protein was successfully induced and purified. In vitro kinase assay, Western blotting, and mass spectrometry showed that Cdk5 can phosphorylate BRCC3. It has been demonstrated that protein kinase Cdk5 can phosphorylate the deubiquitinating enzyme BRCC3 in vitro, which provides new data for further study on the mechanism of neurodegeneration.
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Affiliation(s)
- C H Zhang
- Department of Human Anatomy, Laboratory Animal Center, Guilin Medical College, Guilin, Guangxi, China
| | - K Qin
- Department of Human Anatomy, Laboratory Animal Center, Guilin Medical College, Guilin, Guangxi, China
| | - S L Tian
- Department of Human Anatomy, Laboratory Animal Center, Guilin Medical College, Guilin, Guangxi, China
| | - Y Han
- Department of Human Anatomy, Laboratory Animal Center, Guilin Medical College, Guilin, Guangxi, China
| | - S Y Xu
- Laboratory Animal Center, Guilin Medical College, Guilin, Guangxi, China.
| | - X Y Shao
- Department of Human Anatomy, Laboratory Animal Center, Guilin Medical College, Guilin, Guangxi, China.
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Tian SL, Huang FQ, Li X, Bai AQ, Li GQ, Guo JC, Pu WJ, Chen ZW, Zhang HJ. Molecular identification of hemoplasma and piroplasma species from Rattus edwardsi based on sequences analysis of ribosomal DNA, China. Trop Biomed 2017; 34:1014-1024. [PMID: 33592972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The present study provides the first report on the molecular epidemiological data regarding infection by hemoplasma and piroplasma species in wild Rattus edwardsi, from China. In the current study, blood samples were investigated from 32 wild Rattus edwardsi from Hunan (23) and Guangxi (9) provinces, China. The prevalence of hemoplasma and piroplasma was 65.63% (21/32) and 6.25% (2/32), respectively. Phylogenetic analyses indicated that hemoplasmas (HQ183731, HQ183732) derived from wild Rattus edwardsi in China, can be grouped into a solitary clade closely related to H. muris (HMU82963) and M. haemomuris (AB758435). In addition, it was shown that piroplasmas from this study have very close genetic distance to other unidentified piroplasma species isolated from China (AB242140) and Japan (AB188086). The results suggested that hemoplasmas isolated in this study should be represented as a new genotype. Piroplasmas on the other hand needs more sequenced samples in its life-cycle and evidence to check its taxonomic status. These data may have important implications for researching on the epidemiology and population biology as well as for studying the taxonomy status of hemoplasmas and piroplasmids of wild rodents.
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Affiliation(s)
- S L Tian
- School of Life Sciences, Foshan University, Foshan, Guangdong Province 528231, People's Republic of China
| | - F Q Huang
- School of Life Sciences, Foshan University, Foshan, Guangdong Province 528231, People's Republic of China
- College of Veterinary Medicine, South China Agricultural University, 483 Wushan Street, Tianhe District, Guangzhou, Guangdong Province 510642, People's Republic of China
| | - X Li
- School of Life Sciences, Foshan University, Foshan, Guangdong Province 528231, People's Republic of China
| | - A Q Bai
- School of Life Sciences, Foshan University, Foshan, Guangdong Province 528231, People's Republic of China
| | - G Q Li
- School of Life Sciences, Foshan University, Foshan, Guangdong Province 528231, People's Republic of China
| | - J C Guo
- School of Life Sciences, Foshan University, Foshan, Guangdong Province 528231, People's Republic of China
| | - W J Pu
- School of Life Sciences, Foshan University, Foshan, Guangdong Province 528231, People's Republic of China
| | - Z W Chen
- Li Ka Shing Faculty of Medicine, Hong Kong University, Faculty Office, 6/F, William MW Mong Block 21 Sassoon Road, Pokfulam Hong Kong SAR 999077, People's Republic of China
| | - H J Zhang
- School of Life Sciences, Foshan University, Foshan, Guangdong Province 528231, People's Republic of China
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Bian ZX, Qin HY, Tian SL, Qi SD. Combined effect of early life stress and acute stress on colonic sensory and motor responses through serotonin pathways: differences between proximal and distal colon in rats. Stress 2011; 14:448-58. [PMID: 21438781 DOI: 10.3109/10253890.2011.558604] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Clinically, adults who have experienced stresses in childhood present with episodes of serious symptoms of irritable bowel syndrome that are associated with acute stress, but the mechanism is not well understood. This study aimed to investigate the colonic sensory/motor responses to acute water avoidance stress (WAS) in male adult rats subjected to neonatal maternal separation (NMS), and the underlying mechanism of sensory/motor responses. Effects of the combined acute and early life stress on visceral sensation, colonic motility, and the tissue and luminal content of serotonin (5-hydroxytryptamine, 5-HT) in the proximal and distal colon were evaluated using the abdominal withdrawal reflex test, faecal pellet output measurement and capillary electrophoresis analysis, respectively. Results showed that WAS significantly increased not only visceral sensitivity but also colonic motility in NMS rats compared to the normal rats. These alterations were accompanied by significant increase in 5-HT content in the proximal but not the distal colonic tissues; these alterations were also associated with increased density of enterochromaffin (EC) cells in the proximal segment. In contrast, the faecal content of 5-HT increased similarly in both segments. Consecutive administration of parachlorophenylalanine to NMS rats was more potent at 500 mg kg⁻¹ day⁻¹ than at 150 mg kg⁻¹ day⁻¹ in suppressing colonic sensory/motor responses to WAS, corresponding to the greater reduction of the tissue and faecal content of 5-HT and of EC cell density in the colon. These data indicate that combined early life stress and acute stress effectively induce visceral hyperalgesia and motility disorder through 5-HT pathways in the colon of rats, and the proximal and distal colon have different responses towards the combined stressors.
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Affiliation(s)
- Zhao-Xiang Bian
- School of Chinese Medicine, Hong Kong Baptist University, Hong Kong SAR, People's Republic of China.
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Tian SL, Wang XY. Corrigendum to “Repeated electro-acupuncture attenuates chronic visceral hypersensitivity and spinal cord NMDA receptor phosphorylation in a rat irritable bowel syndrome model” [Life Sciences 83 (2008) 356–363]. Life Sci 2010. [DOI: 10.1016/j.lfs.2010.03.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Tian SL, Jiang H, Shi J. [TRPM7: a membrane protein with ion channel and kinase activities]. Sheng Li Ke Xue Jin Zhan 2009; 40:253-257. [PMID: 19803432] [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: 05/28/2023]
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Tian SL, Wang XY, Ding GH. Repeated electro-acupuncture attenuates chronic visceral hypersensitivity and spinal cord NMDA receptor phosphorylation in a rat irritable bowel syndrome model. Life Sci 2008; 83:356-63. [PMID: 18694764 DOI: 10.1016/j.lfs.2008.06.027] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2008] [Revised: 06/20/2008] [Accepted: 06/25/2008] [Indexed: 02/07/2023]
Abstract
Acupuncture has been used in clinical trials for the treatment of abdominal pain in patients with irritable bowel syndrome (IBS). However, scientific evidence is still lacking and the underlying mechanism remains largely unexplored. The aim of this study was to examine the effects of repeated administration of electro-acupuncture (EA) on chronic visceral hypersensitivity and on the phosphorylation of spinal cord N-methyl-D-aspartic acid (NMDA) receptors in a rat model of IBS. The results showed that repeated administration of EA at bilateral points of Zu-san-li (ST-36) and Shang-ju-xu (ST-37) significantly attenuated chronic visceral hypersensitivity induced in young adult rats by neonatal colon irritation. Such an effect was not seen in either of the two controls: sham-EA at ST-36 and ST-37 without electrical stimulation and EA at control points (BL-62 and tail). Furthermore, rats with chronic visceral hypersensitivity exhibited high-level expression of phosphorylated NMDA receptor subunit 1 (pNR1) in the spinal cord (L4-L5 segments), which was markedly attenuated by EA treatment. In addition, EA at ST-36 and ST-37 neither altered the pain threshold of normal rats nor affected the expression of pNR1 in the lumbosacral spinal cord. Altogether, these data indicate that the EA-mediated attenuation of chronic visceral hypersensitivity is correlated with the down-regulation of NMDA receptors phosphorylation at the spinal level.
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Affiliation(s)
- Shun-Lian Tian
- Department of Mechanics and Engineering Science, Fudan University, Shanghai, PR China
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Jiang H, Tian SL, Zeng Y, Li LL, Shi J. TrkA pathway(s) is involved in regulation of TRPM7 expression in hippocampal neurons subjected to ischemic-reperfusion and oxygen–glucose deprivation. Brain Res Bull 2008; 76:124-30. [DOI: 10.1016/j.brainresbull.2008.01.013] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2007] [Revised: 01/15/2008] [Accepted: 01/16/2008] [Indexed: 01/09/2023]
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Tian SL, Jiang H, Zeng Y, Li LL, Shi J. NGF-induced reduction of an outward-rectifying TRPM7-like current in rat CA1 hippocampal neurons. Neurosci Lett 2007; 419:93-8. [PMID: 17482355 DOI: 10.1016/j.neulet.2007.04.020] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2006] [Revised: 03/18/2007] [Accepted: 04/10/2007] [Indexed: 11/21/2022]
Abstract
Transient receptor potential melastatin 7 (TRPM7) channels are widely expressed in the nervous system; however, their function and regulation are largely unknown. This study aimed to explore whether the current mediated by TRPM7-like channels in rat CA1 hippocampal neurons could be modulated by nerve growth factor (NGF). Using whole-cell patch clamp techniques, we identified an outward-rectifying TRPM7-like current in hippocampal neurons freshly isolated from postnatal (10-day-old) rats. The outward component of this current was reversibly reduced by NGF in dose- and time-dependent manners, and this effect was substantially blocked by K252a, an inhibitor of TrkA. In addition, NGF-induced reduction of the TRPM7-like current was abolished by U73122, a phopholipase C inhibitor. In light of the abundance of NGF in hippocampus that express both TrkA and TRPM7, these results suggest that the function of TRPM7-like channels in hippocampal neurons may be regulated by NGF.
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Affiliation(s)
- Shun-Lian Tian
- Department of Neurobiology and Key Laboratory of Neurological Disease of Hubei Province, Tongji Medical College, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan 430030, PR China
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