1
|
Wang J, Mao L, Li Y, Lu K, Qu C, Tang Z, Li J, Liu L. Natural variation in BnaA9.NF-YA7 contributes to drought tolerance in Brassica napus L. Nat Commun 2024; 15:2082. [PMID: 38453909 PMCID: PMC10920887 DOI: 10.1038/s41467-024-46271-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Accepted: 02/21/2024] [Indexed: 03/09/2024] Open
Abstract
Rapeseed (Brassica napus) is one of the important oil crops worldwide. Its production is often threatened by drought stress. Here, we identify a transcription factor (BnaA9.NF-YA7) that negatively regulates drought tolerance through genome-wide association study in B. napus. The presence of two SNPs within a CCAAT cis element leads to downregulation of BnaA9.NF-YA7 expression. In addition, the M63I (G-to-C) substitution in the transactivation domain can activate low level expression of BnaA4.DOR, which is an inhibitory factor of ABA-induced stomatal closure. Furthermore, we determine that Bna.ABF3/4s directly regulate the expression of BnaA9.NF-YA7, and BnaA9.NF-YA7 indirectly suppresses the expression of Bna.ABF3/4s by regulation of Bna.ASHH4s. Our findings uncover that BnaA9.NF-YA7 serves as a supplementary role for ABA signal balance under drought stress conditions, and provide a potential molecular target to breed drought-tolerant B. napus cultivars.
Collapse
Affiliation(s)
- Jia Wang
- College of Agronomy and Biotechnology, Southwest University, Beibei, Chongqing, 400715, China
- Academy of Agricultural Science, Southwest University, Beibei, Chongqing, 400715, China
| | - Lin Mao
- College of Agronomy and Biotechnology, Southwest University, Beibei, Chongqing, 400715, China
- Academy of Agricultural Science, Southwest University, Beibei, Chongqing, 400715, China
| | - Yangyang Li
- College of Agronomy and Biotechnology, Southwest University, Beibei, Chongqing, 400715, China
- Academy of Agricultural Science, Southwest University, Beibei, Chongqing, 400715, China
| | - Kun Lu
- College of Agronomy and Biotechnology, Southwest University, Beibei, Chongqing, 400715, China
- Academy of Agricultural Science, Southwest University, Beibei, Chongqing, 400715, China
| | - Cunmin Qu
- College of Agronomy and Biotechnology, Southwest University, Beibei, Chongqing, 400715, China
- Academy of Agricultural Science, Southwest University, Beibei, Chongqing, 400715, China
| | - Zhanglin Tang
- College of Agronomy and Biotechnology, Southwest University, Beibei, Chongqing, 400715, China
- Academy of Agricultural Science, Southwest University, Beibei, Chongqing, 400715, China
| | - Jiana Li
- College of Agronomy and Biotechnology, Southwest University, Beibei, Chongqing, 400715, China
- Academy of Agricultural Science, Southwest University, Beibei, Chongqing, 400715, China
| | - Liezhao Liu
- College of Agronomy and Biotechnology, Southwest University, Beibei, Chongqing, 400715, China.
- Academy of Agricultural Science, Southwest University, Beibei, Chongqing, 400715, China.
| |
Collapse
|
2
|
Chen YT, Jhao PY, Hung CT, Wu YF, Lin SJ, Chiang WC, Lin SL, Yang KC. Endoplasmic reticulum protein TXNDC5 promotes renal fibrosis by enforcing TGF-β signaling in kidney fibroblasts. J Clin Invest 2021; 131:143645. [PMID: 33465051 DOI: 10.1172/jci143645] [Citation(s) in RCA: 57] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Accepted: 01/13/2021] [Indexed: 01/18/2023] Open
Abstract
Renal fibrosis, a common pathological manifestation of virtually all types of chronic kidney disease (CKD), often results in diffuse kidney scarring and predisposes to end-stage renal disease. Currently, there is no effective therapy against renal fibrosis. Recently, our laboratory identified an ER-resident protein, thioredoxin domain containing 5 (TXNDC5), as a critical mediator of cardiac fibrosis. Transcriptome analyses of renal biopsy specimens from patients with CKD revealed marked TXNDC5 upregulation in fibrotic kidneys, suggesting a potential role of TXNDC5 in renal fibrosis. Employing multiple fluorescence reporter mouse lines, we showed that TXNDC5 was specifically upregulated in collagen-secreting fibroblasts in fibrotic mouse kidneys. In addition, we showed that TXNDC5 was required for TGF-β1-induced fibrogenic responses in human kidney fibroblasts (HKFs), whereas TXNDC5 overexpression was sufficient to promote HKF activation, proliferation, and collagen production. Mechanistically, we showed that TXNDC5, transcriptionally controlled by the ATF6-dependent ER stress pathway, mediated its profibrogenic effects by enforcing TGF-β signaling activity through posttranslational stabilization and upregulation of type I TGF-β receptor in kidney fibroblasts. Using a tamoxifen-inducible, fibroblast-specific Txndc5 knockout mouse line, we demonstrated that deletion of Txndc5 in kidney fibroblasts mitigated the progression of established kidney fibrosis, suggesting the therapeutic potential of TXNDC5 targeting for renal fibrosis and CKD.
Collapse
Affiliation(s)
- Yen-Ting Chen
- Department and Graduate Institute of Pharmacology, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Pei-Yu Jhao
- Department and Graduate Institute of Pharmacology, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Chen-Ting Hung
- Department and Graduate Institute of Pharmacology, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Yueh-Feng Wu
- Research Center for Developmental Biology and Regenerative Medicine and.,Department of Biomedical Engineering, College of Medicine and College of Engineering, National Taiwan University, Taipei, Taiwan
| | - Sung-Jan Lin
- Research Center for Developmental Biology and Regenerative Medicine and.,Department of Biomedical Engineering, College of Medicine and College of Engineering, National Taiwan University, Taipei, Taiwan.,Department of Dermatology, National Taiwan University Hospital and College of Medicine, Taipei, Taiwan
| | - Wen-Chih Chiang
- Division of Nephrology, Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan
| | - Shuei-Liong Lin
- Research Center for Developmental Biology and Regenerative Medicine and.,Division of Nephrology, Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan.,Department and Graduate Institute of Physiology, National Taiwan University College of Medicine, Taipei, Taiwan.,Department of Integrated Diagnostics and Therapeutics and
| | - Kai-Chien Yang
- Department and Graduate Institute of Pharmacology, National Taiwan University College of Medicine, Taipei, Taiwan.,Research Center for Developmental Biology and Regenerative Medicine and.,Division of Cardiology, Department of Internal Medicine and Cardiovascular Center, National Taiwan University Hospital, Taipei, Taiwan.,Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| |
Collapse
|
3
|
Le TT, Bruckbauer A, Tahirbegi B, Magness AJ, Ying L, Ellington AD, Cass AEG. A highly stable RNA aptamer probe for the retinoblastoma protein in live cells. Chem Sci 2020; 11:4467-4474. [PMID: 34122904 PMCID: PMC8159449 DOI: 10.1039/d0sc01613f] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Although RNA aptamers can show comparable or better specificity and affinity to antibodies and have the advantage of being able to access different live cell compartments, they are often much less stable in vivo. We report here the first aptamer that binds human retinoblastoma protein (RB) and is stable in live cells. RB is both a key protein in cell cycle control and also a tumour suppressor. The aptamer was selected from an RNA library against a unique 12-residue helical peptide derived from RB rather than the whole protein molecule. It binds RB with high affinity (K d = 5.1 ± 0.1 nM) and is a putative RNA G-quadruplex structure formed by an 18-nucleotide sequence (18E16 - GGA GGG UGG AGG GAA GGG), which may account for its high stability. Confocal fluorescence microscopy of live cells transfected with the aptamer shows it is stable intracellularly and efficient in entering the nucleus where an analogous antibody was inaccessible. The findings demonstrate this aptamer is an advanced probe for RB in live cell applications.
Collapse
Affiliation(s)
- Thao T Le
- Department of Chemistry, Imperial College London 80 Wood Lane W12 0BZ UK
| | | | - Bogachan Tahirbegi
- Department of Chemistry, Imperial College London 80 Wood Lane W12 0BZ UK
| | | | - Liming Ying
- National Heart and Lung Institute, Imperial College London SW7 2AZ UK
| | - Andrew D Ellington
- Molecular Biosciences, The University of Texas at Austin Texas 78712 USA
| | - Anthony E G Cass
- Department of Chemistry, Imperial College London 80 Wood Lane W12 0BZ UK
| |
Collapse
|
4
|
Xiao Y, Zheng Y, Tan P, Xu P, Zhang Q. Overexpression of nuclear distribution protein (hNUDC) causes pro-apoptosis and differentiation in Dami megakaryocytes. Cell Prolif 2013; 46:576-85. [PMID: 24010816 DOI: 10.1111/cpr.12055] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2013] [Accepted: 05/01/2013] [Indexed: 11/27/2022] Open
Abstract
OBJECTIVES Overexpression of hNUDC, a member of the nuclear distribution protein family, reduces cell population growth in prostate cancer cell lines, concurrent with induced morphological change and enhanced polyploidization. These phenomena are also closely associated with terminal phases of megakaryocyte maturation. MATERIALS AND METHODS In Dami cells, MTT and trypan blue assays were used to investigate cell viability and proliferation effects of hNUDC, and flow cytometry was used to analyse cell cycle and DNA content. Real-time RT-PCR was employed to detect mRNA expression. Activations of caspase-3, ERK, Akt and Stat-5 were determined by immunoblotting. May-Grünwald-Giemsa staining was performed to reveal cell morphology. RESULTS AND CONCLUSION Functional studies using adenovirus-mediated hNUDC overexpression led to inhibition of megakaryocyte proliferation via cell cycle arrest in G2/M transition phase. This process could have been be mediated by upregulation of p21 and downregulation of its downstream targets, including cyclin B1, cyclin B2 and c-myc. Enhanced apoptosis in turn ensued, characterized by increased caspase-3 activation, upregulation of pro-apoptotic Bax and downregulation of anti-apoptotic Bcl-2. Furthermore, hNUDC overexpression elevated the level of megakaryocyte maturation, associated with increased polyploidy, cell morphological changes and increased expression of cell surface differentiation markers, including CD10, CD44, CD41 and CD61. Our results further suggest that the ERK signalling pathway was involved in hNUDC overexpression-induced apoptosis. Taken together, this study provides experimental evidence for overexpression of hNUDC in Dami cells and suggests that activation of apoptotic machinery may be involved in megakaryocytic differentiation.
Collapse
Affiliation(s)
- Y Xiao
- Key Laboratory of Gene Engineering of Education Ministry, School of Life Sciences, Zhongshan University, Guangzhou, 510275, China
| | | | | | | | | |
Collapse
|