1
|
Arkhipov SN, Liao TD, Potter DL, Bobbitt KR, Ivanov V, Ortiz PA, Pavlov TS. Dissociation of Hypertension and Renal Damage After Cessation of High-Salt Diet in Dahl Rats. Hypertension 2024; 81:1345-1355. [PMID: 38618734 PMCID: PMC11096017 DOI: 10.1161/hypertensionaha.123.21887] [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: 08/04/2023] [Accepted: 03/29/2024] [Indexed: 04/16/2024]
Abstract
BACKGROUND Every year, thousands of patients with hypertension reduce salt consumption in an effort to control their blood pressure. However, hypertension has a self-sustaining character in a significant part of the population. We hypothesized that chronic hypertension leads to irreversible renal damage that remains after removing the trigger, causing an elevation of the initial blood pressure. METHODS Dahl salt-sensitive rat model was used for chronic, continuous observation of blood pressure. Rats were fed a high salt diet to induce hypertension, and then the diet was switched back to normal sodium content. RESULTS We found that developed hypertension was irreversible by salt cessation: after a short period of reduction, blood pressure grew even higher than in the high-salt phase. Notably, the self-sustaining phase of hypertension was sensitive to benzamil treatment due to sustaining epithelial sodium channel hyperactivity, as shown with patch-clamp analysis. Glomerular damage and proteinuria were also irreversible. In contrast, some mechanisms, contributing to the development of salt-sensitive hypertension, normalized after salt restriction. Thus, flow cytometry demonstrated that dietary salt reduction in hypertensive animals decreased the number of total CD45+, CD3+CD4+, and CD3+CD8+ cells in renal tissues. Also, we found tubular recovery and improvement of glomerular filtration rate in the postsalt period versus a high-salt diet. CONCLUSIONS Based on earlier publications and current data, poor response to salt restriction is due to the differential contribution of the factors recognized in the developmental phase of hypertension. We suggest that proteinuria or electrolyte transport can be prioritized over therapeutic targets of inflammatory response.
Collapse
Affiliation(s)
- Sergey N. Arkhipov
- Division of Hypertension and Vascular Research, Henry Ford Health
- Department of Physiology, Wayne State University
| | - Tang-Dong Liao
- Division of Hypertension and Vascular Research, Henry Ford Health
| | - D'Anna L. Potter
- Division of Hypertension and Vascular Research, Henry Ford Health
| | | | - Veniamin Ivanov
- Division of Hypertension and Vascular Research, Henry Ford Health
| | - Pablo A. Ortiz
- Division of Hypertension and Vascular Research, Henry Ford Health
- Department of Physiology, Wayne State University
| | - Tengis S. Pavlov
- Division of Hypertension and Vascular Research, Henry Ford Health
- Department of Physiology, Wayne State University
| |
Collapse
|
2
|
Pan X, Geng X, Liu Y, Yu M, Mishra MK, Xu X, Ding X, Liu P, Liang M. Transfer RNA Fragments in the Kidney in Hypertension. Hypertension 2021; 77:1627-1637. [PMID: 33775129 DOI: 10.1161/hypertensionaha.121.16994] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
[Figure: see text].
Collapse
Affiliation(s)
- Xiaoqing Pan
- Department of Mathematics, Shanghai Normal University, China (X.P.).,Center of Systems Molecular Medicine, Department of Physiology, Medical College of Wisconsin, Milwaukee (X.P., X.G., Y.L., M.K.M., P.L., M.L.)
| | - Xuemei Geng
- Center of Systems Molecular Medicine, Department of Physiology, Medical College of Wisconsin, Milwaukee (X.P., X.G., Y.L., M.K.M., P.L., M.L.).,Department of Nephrology, Zhongshan Hospital, Fudan University, Shanghai Institute of Kidney and Dialysis, Shanghai Key Laboratory of Kidney and Blood Purification, Shanghai Medical Center of Kidney Disease, China (X.G., X.X., X.D.)
| | - Yong Liu
- Center of Systems Molecular Medicine, Department of Physiology, Medical College of Wisconsin, Milwaukee (X.P., X.G., Y.L., M.K.M., P.L., M.L.)
| | - Mengqian Yu
- Department of Respiratory Medicine, Sir Run Run Shaw Hospital and Institute of Translational Medicine, Zhejiang University School of Medicine, Hangzhou, China (M.Y., P.L.)
| | - Manoj K Mishra
- Center of Systems Molecular Medicine, Department of Physiology, Medical College of Wisconsin, Milwaukee (X.P., X.G., Y.L., M.K.M., P.L., M.L.)
| | - Xialian Xu
- Department of Nephrology, Zhongshan Hospital, Fudan University, Shanghai Institute of Kidney and Dialysis, Shanghai Key Laboratory of Kidney and Blood Purification, Shanghai Medical Center of Kidney Disease, China (X.G., X.X., X.D.)
| | - Xiaoqiang Ding
- Department of Nephrology, Zhongshan Hospital, Fudan University, Shanghai Institute of Kidney and Dialysis, Shanghai Key Laboratory of Kidney and Blood Purification, Shanghai Medical Center of Kidney Disease, China (X.G., X.X., X.D.)
| | - Pengyuan Liu
- Center of Systems Molecular Medicine, Department of Physiology, Medical College of Wisconsin, Milwaukee (X.P., X.G., Y.L., M.K.M., P.L., M.L.).,Department of Respiratory Medicine, Sir Run Run Shaw Hospital and Institute of Translational Medicine, Zhejiang University School of Medicine, Hangzhou, China (M.Y., P.L.)
| | - Mingyu Liang
- Center of Systems Molecular Medicine, Department of Physiology, Medical College of Wisconsin, Milwaukee (X.P., X.G., Y.L., M.K.M., P.L., M.L.)
| |
Collapse
|
3
|
Zhang C, Fang X, Zhang H, Gao W, Hsu HJ, Roman RJ, Fan F. Genetic susceptibility of hypertension-induced kidney disease. Physiol Rep 2021; 9:e14688. [PMID: 33377622 PMCID: PMC7772938 DOI: 10.14814/phy2.14688] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 11/22/2020] [Accepted: 11/27/2020] [Indexed: 02/06/2023] Open
Abstract
Hypertension is the second leading cause of end-stage renal disease (ESRD) after diabetes mellitus. The significant differences in the incidence of hypertensive ESRD between different patient populations worldwide and patients with and without family history indicate that genetic determinants play an important role in the onset and progression of this disease. Recent studies have identified genetic variants and pathways that may contribute to the alteration of renal function. Mechanisms involved include affecting renal hemodynamics (the myogenic and tubuloglomerular feedback responses); increasing the production of reactive oxygen species in the tubules; altering immune cell function; changing the number, structure, and function of podocytes that directly cause glomerular damage. Studies with hypertensive animal models using substitution mapping and gene knockout strategies have identified multiple candidate genes associated with the development of hypertension and subsequent renal injury. Genome-wide association studies have implicated genetic variants in UMOD, MYH9, APOL-1, SHROOM3, RAB38, and DAB2 have a higher risk for ESRD in hypertensive patients. These findings provide genetic evidence of potential novel targets for drug development and gene therapy to design individualized treatment of hypertension and related renal injury.
Collapse
Affiliation(s)
- Chao Zhang
- Department of Pharmacology and ToxicologyUniversity of Mississippi Medical CenterJacksonMississippiUSA
- Department of UrologyZhongshan HospitalFudan UniversityShanghaiChina
| | - Xing Fang
- Department of Pharmacology and ToxicologyUniversity of Mississippi Medical CenterJacksonMississippiUSA
| | - Huawei Zhang
- Department of Pharmacology and ToxicologyUniversity of Mississippi Medical CenterJacksonMississippiUSA
| | - Wenjun Gao
- Department of Pharmacology and ToxicologyUniversity of Mississippi Medical CenterJacksonMississippiUSA
- Department of UrologyZhongshan HospitalFudan UniversityShanghaiChina
| | - Han Jen Hsu
- Department of UrologyZhongshan HospitalFudan UniversityShanghaiChina
| | - Richard J. Roman
- Department of Pharmacology and ToxicologyUniversity of Mississippi Medical CenterJacksonMississippiUSA
| | - Fan Fan
- Department of Pharmacology and ToxicologyUniversity of Mississippi Medical CenterJacksonMississippiUSA
| |
Collapse
|
4
|
Cheng Y, Wang D, Wang F, Liu J, Huang B, Baker MA, Yin J, Wu R, Liu X, Regner KR, Usa K, Liu Y, Zhang C, Dong L, Geurts AM, Wang N, Miller SS, He Y, Liang M. Endogenous miR-204 Protects the Kidney against Chronic Injury in Hypertension and Diabetes. J Am Soc Nephrol 2020; 31:1539-1554. [PMID: 32487559 DOI: 10.1681/asn.2019101100] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Accepted: 04/09/2020] [Indexed: 11/03/2022] Open
Abstract
BACKGROUND Aberrant microRNA (miRNA) expression affects biologic processes and downstream genes that are crucial to CKD initiation or progression. The miRNA miR-204-5p is highly expressed in the kidney but whether miR-204-5p plays any role in the development of chronic renal injury is unknown. METHODS We used real-time PCR to determine levels of miR-204 in human kidney biopsies and animal models. We generated Mir204 knockout mice and used locked nucleic acid-modified anti-miR to knock down miR-204-5p in mice and rats. We used a number of physiologic, histologic, and molecular techniques to analyze the potential role of miR-204-5p in three models of renal injury. RESULTS Kidneys of patients with hypertension, hypertensive nephrosclerosis, or diabetic nephropathy exhibited a significant decrease in miR-204-5p compared with controls. Dahl salt-sensitive rats displayed lower levels of renal miR-204-5p compared with partially protected congenic SS.13BN26 rats. Administering anti-miR-204-5p to SS.13BN26 rats exacerbated interlobular artery thickening and renal interstitial fibrosis. In a mouse model of hypertensive renal injury induced by uninephrectomy, angiotensin II, and a high-salt diet, Mir204 gene knockout significantly exacerbated albuminuria, renal interstitial fibrosis, and interlobular artery thickening, despite attenuation of hypertension. In diabetic db/db mice, administering anti-miR-204-5p exacerbated albuminuria and cortical fibrosis without influencing blood glucose levels. In all three models, inhibiting miR-204-5p or deleting Mir204 led to upregulation of protein tyrosine phosphatase SHP2, a target gene of miR-204-5p, and increased phosphorylation of signal transducer and activator of transcription 3, or STAT3, which is an injury-promoting effector of SHP2. CONCLUSIONS These findings indicate that the highly expressed miR-204-5p plays a prominent role in safeguarding the kidneys against common causes of chronic renal injury.
Collapse
Affiliation(s)
- Yuan Cheng
- Department of Nephrology, Shenzhen Second People's Hospital, First Affiliated Hospital of Shenzhen University, Clinical Institute of Anhui Medical University, Shenzhen, People's Republic of China.,The Center for Nephrology and Urology, Shenzhen University Health Science Center, Shenzhen University, Shenzhen, People's Republic of China.,Center of Systems Molecular Medicine, Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Dandan Wang
- The Center for Nephrology and Urology, Shenzhen University Health Science Center, Shenzhen University, Shenzhen, People's Republic of China.,Center of Systems Molecular Medicine, Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin.,Department of Nephrology, Shenzhen Traditional Chinese Medicine Hospital, The Fourth Clinical Medical College of Guangzhou University of Chinese Medicine, Shenzhen, People's Republic of China
| | - Feng Wang
- Center of Systems Molecular Medicine, Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin.,Department of Nephrology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, People's Republic of China
| | - Jing Liu
- Center of Systems Molecular Medicine, Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Baorui Huang
- Center of Systems Molecular Medicine, Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin.,Department of Nephrology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, People's Republic of China
| | - Maria Angeles Baker
- Center of Systems Molecular Medicine, Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Jianyong Yin
- Department of Nephrology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, People's Republic of China
| | - Rui Wu
- Department of Nephrology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, People's Republic of China
| | - Xuanchen Liu
- Department of Nephrology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, People's Republic of China
| | - Kevin R Regner
- Division of Nephrology, Department of Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Kristie Usa
- Center of Systems Molecular Medicine, Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Yong Liu
- Center of Systems Molecular Medicine, Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Congxiao Zhang
- Section of Epithelial and Retinal Physiology and Disease, National Eye Institute, National Institutes of Health, Bethesda, Maryland
| | - Lijin Dong
- Section of Epithelial and Retinal Physiology and Disease, National Eye Institute, National Institutes of Health, Bethesda, Maryland
| | - Aron M Geurts
- Center of Systems Molecular Medicine, Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Niansong Wang
- Department of Nephrology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, People's Republic of China
| | - Sheldon S Miller
- Section of Epithelial and Retinal Physiology and Disease, National Eye Institute, National Institutes of Health, Bethesda, Maryland
| | - Yongcheng He
- Department of Nephrology, Shenzhen Hengsheng Hospital, Shenzhen, Guangdong, People's Republic of China
| | - Mingyu Liang
- Center of Systems Molecular Medicine, Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
| |
Collapse
|
5
|
Cowley AW, Dwinell MR. Chromosomal Substitution Strategies to Localize Genomic Regions Related to Complex Traits. Compr Physiol 2020; 10:365-388. [PMID: 32163204 DOI: 10.1002/cphy.c180029] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Chromosomal substitution strategies provide a powerful tool to anonymously reveal the relationship between DNA sequence variants and a normal or disease phenotype of interest. Even in this age of CRISPR-Cas9 genome engineering, the knockdown or overexpression of a gene provides relevant information to our understanding of complex disease only when a close association of an allelic variant with the phenotype has first been established. Limitations of genetic linkage approaches led to the development of more efficient breeding strategies to substitute chromosomal segments from one animal strain into the genetic background of a different strain, enabling a direct comparison of the phenotypes of the strains with variant(s) that differ only at a defined locus. This substitution can be a whole chromosome (consomic), a part of a chromosome (congenic), or as small as only a single or several alleles (subcongenics). In contrast to complete knockout of a specific candidate gene of interest, which simply studies the effects of complete elimination of the gene, the substitution of naturally occurring variants can provide special insights into the functional actions of wild-type alleles. Strategies for production of these inbred strains are reviewed, and a number of examples are used to illustrate the utility of these model systems. Consomic/congenic strains provide a number of experimental advantages in the study of functions of genes and their variants, which are emphasized in this article, such as replication of experimental studies; determination of temporal relationships throughout a life; rigorously controlled experiments in which relations between genotype and phenotype can be tested with the confounding effects of heterogeneous genetic backgrounds, both targeted and multilayered; and "omic" studies performed at many levels of functionality, from molecules to organelles, cells to organs, and organs to organismal behavior across the life span. The application of chromosomal substitution strategies and development of consomic/congenic rat and mouse strains have greatly expanded our knowledge of genomic variants and their phenotypic relationship to physiological functions and to complex diseases such as hypertension and cancer. © 2020 American Physiological Society. Compr Physiol 10:365-388, 2020.
Collapse
Affiliation(s)
- Allen W Cowley
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin, USA
| | - Melinda R Dwinell
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin, USA
| |
Collapse
|
6
|
Abais-Battad JM, Lund H, Dasinger JH, Fehrenbach DJ, Cowley AW, Mattson DL. NOX2-derived reactive oxygen species in immune cells exacerbates salt-sensitive hypertension. Free Radic Biol Med 2020; 146:333-339. [PMID: 31730933 PMCID: PMC6942201 DOI: 10.1016/j.freeradbiomed.2019.11.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Revised: 10/29/2019] [Accepted: 11/11/2019] [Indexed: 12/11/2022]
Abstract
Previous studies utilizing the SSp67phox-/- rat have demonstrated the importance of systemic NADPH oxidase NOX2-derived reactive oxygen species (ROS) production in the pathogenesis of Dahl Salt-Sensitive (SS) hypertension and renal damage. It is established that the immune system contributes to the development of SS hypertension and our laboratory has observed an enrichment of NOX2 subunits in infiltrating T cells. However, the contribution of immune cell-derived ROS in SS hypertension remains unknown. To assess the role of ROS in immune cells, SSp67phox-/- rats underwent total body irradiation and received bone marrow transfer from either SS (+SS) or SSp67phox-/- (+SSp67phox-/-) donor rats. Demonstrated in a respiratory burst assay, response to phorbol 12-myristate 13-acetate stimulus (135 μM) was 10.2-fold greater in peritoneal macrophages isolated from +SS rats compared to nonresponsive + SSp67phox-/- cells, validating that + SS rats were capable of producing NOX2-derived ROS in cells of hematopoietic origin. After 3 weeks of high salt challenge, there was an exacerbated increase in mean arterial pressure in +SS rats compared to + SSp67phox-/- control rats (176.1 ± 4.7 vs 147.9 ± 8.4 mmHg, respectively), which was accompanied by a significant increase in albuminuria (168.3 ± 23.7 vs 107.0 ± 20.4 mg/day) and renal medullary protein cast formation (33.2 ± 4.7 vs 8.1 ± 3.5%). Interestingly, upon analysis of renal immune cells, there was trending increase of CD11b/c + monocytes and macrophages in the kidney of +SS rats (4.7 ± 0.4 vs 3.5 ± 0.5 × 106 cells/kidney, +SS vs + SSp67phox-/-, p = 0.06). These data altogether demonstrate that immune cell production of NOX2-derived ROS is sufficient to exacerbate Dahl SS hypertension, renal damage, and renal inflammation.
Collapse
Affiliation(s)
- Justine M Abais-Battad
- Department of Physiology, Medical College of Wisconsin, Milwaukee, WI, USA; Department of Physiology, Medical College of Georgia at Augusta University, Augusta, GA, USA.
| | - Hayley Lund
- Department of Physiology, Medical College of Georgia at Augusta University, Augusta, GA, USA
| | - John Henry Dasinger
- Department of Physiology, Medical College of Wisconsin, Milwaukee, WI, USA; Department of Physiology, Medical College of Georgia at Augusta University, Augusta, GA, USA
| | - Daniel J Fehrenbach
- Department of Physiology, Medical College of Wisconsin, Milwaukee, WI, USA; Department of Physiology, Medical College of Georgia at Augusta University, Augusta, GA, USA
| | - Allen W Cowley
- Department of Physiology, Medical College of Georgia at Augusta University, Augusta, GA, USA
| | - David L Mattson
- Department of Physiology, Medical College of Wisconsin, Milwaukee, WI, USA; Department of Physiology, Medical College of Georgia at Augusta University, Augusta, GA, USA
| |
Collapse
|
7
|
Baker MA, Wang F, Liu Y, Kriegel AJ, Geurts AM, Usa K, Xue H, Wang D, Kong Y, Liang M. MiR-192-5p in the Kidney Protects Against the Development of Hypertension. Hypertension 2019; 73:399-406. [PMID: 30595117 DOI: 10.1161/hypertensionaha.118.11875] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
MicroRNA miR-192-5p is one of the most abundant microRNAs in the kidney and targets the mRNA for ATP1B1 (β1 subunit of Na+/K+-ATPase). Na+/K+-ATPase drives renal tubular reabsorption. We hypothesized that miR-192-5p in the kidney would protect against the development of hypertension. We found miR-192-5p levels were significantly lower in kidney biopsy specimens from patients with hypertension (n=8) or hypertensive nephrosclerosis (n=32) compared with levels in controls (n=10). Similarly, Dahl salt-sensitive (SS) rats showed a reduced abundance of miR-192-5p in the renal cortex compared with congenic SS.13BN26 rats that had reduced salt sensitivity (n=9; P<0.05). Treatment with anti-miR-192-5p delivered through renal artery injection in uninephrectomized SS.13BN26 rats exacerbated hypertension significantly. Mean arterial pressure on a 4% NaCl high-salt diet at day 14 post anti-miR-192-5p treatment was 16 mm Hg higher than in rats treated with scrambled anti-miR (n=8 and 6; P<0.05). Similarly, Mir192 knockout mice on the high-salt diet treated with Ang II (angiotensin II) for 14 days exhibited a mean arterial pressure 22 mm Hg higher than wild-type mice (n=9 and 5; P<0.05). Furthermore, protein levels of ATP1B1 were higher in Dahl SS rats than in SS.13BN26 rats. Na+/K+-ATPase activity increased in the renal cortex of SS.13BN26 rats 9 days posttreatment with anti-miR-192-5p compared with that of control anti-miR treated rats. Intrarenal knockdown of ATP1B1 attenuated hypertension in SS.13BN26 rats with intrarenal knockdown of miR-192-5p. In conclusion, miR-192-5p in the kidney protects against the development of hypertension, which is mediated, at least in part, by targeting Atp1b1.
Collapse
Affiliation(s)
- Maria Angeles Baker
- From the Department of Physiology, Center of Systems Molecular Medicine, Medical College of Wisconsin, Milwaukee (M.A.B., F.W., Y.L., A.J.K., A.M.G., K.U., H.X., D.W., Y.K., M.L.)
| | - Feng Wang
- From the Department of Physiology, Center of Systems Molecular Medicine, Medical College of Wisconsin, Milwaukee (M.A.B., F.W., Y.L., A.J.K., A.M.G., K.U., H.X., D.W., Y.K., M.L.).,Department of Nephrology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, China (F.W., Y.K.)
| | - Yong Liu
- From the Department of Physiology, Center of Systems Molecular Medicine, Medical College of Wisconsin, Milwaukee (M.A.B., F.W., Y.L., A.J.K., A.M.G., K.U., H.X., D.W., Y.K., M.L.)
| | - Alison J Kriegel
- From the Department of Physiology, Center of Systems Molecular Medicine, Medical College of Wisconsin, Milwaukee (M.A.B., F.W., Y.L., A.J.K., A.M.G., K.U., H.X., D.W., Y.K., M.L.)
| | - Aron M Geurts
- From the Department of Physiology, Center of Systems Molecular Medicine, Medical College of Wisconsin, Milwaukee (M.A.B., F.W., Y.L., A.J.K., A.M.G., K.U., H.X., D.W., Y.K., M.L.)
| | - Kristie Usa
- From the Department of Physiology, Center of Systems Molecular Medicine, Medical College of Wisconsin, Milwaukee (M.A.B., F.W., Y.L., A.J.K., A.M.G., K.U., H.X., D.W., Y.K., M.L.)
| | - Hong Xue
- From the Department of Physiology, Center of Systems Molecular Medicine, Medical College of Wisconsin, Milwaukee (M.A.B., F.W., Y.L., A.J.K., A.M.G., K.U., H.X., D.W., Y.K., M.L.)
| | - Dandan Wang
- From the Department of Physiology, Center of Systems Molecular Medicine, Medical College of Wisconsin, Milwaukee (M.A.B., F.W., Y.L., A.J.K., A.M.G., K.U., H.X., D.W., Y.K., M.L.)
| | - Yiwei Kong
- From the Department of Physiology, Center of Systems Molecular Medicine, Medical College of Wisconsin, Milwaukee (M.A.B., F.W., Y.L., A.J.K., A.M.G., K.U., H.X., D.W., Y.K., M.L.).,Department of Nephrology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, China (F.W., Y.K.)
| | - Mingyu Liang
- From the Department of Physiology, Center of Systems Molecular Medicine, Medical College of Wisconsin, Milwaukee (M.A.B., F.W., Y.L., A.J.K., A.M.G., K.U., H.X., D.W., Y.K., M.L.)
| |
Collapse
|
8
|
Liu P, Liu Y, Liu H, Pan X, Li Y, Usa K, Mishra MK, Nie J, Liang M. Role of DNA De Novo (De)Methylation in the Kidney in Salt-Induced Hypertension. Hypertension 2018; 72:1160-1171. [PMID: 30354815 PMCID: PMC6314686 DOI: 10.1161/hypertensionaha.118.11650] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Accepted: 07/31/2018] [Indexed: 12/19/2022]
Abstract
Numerous adult diseases involving tissues consisting primarily of nondividing cells are associated with changes in DNA methylation. It suggests a pathophysiological role for de novo methylation or demethylation of DNA, which is catalyzed by DNA methyltransferase 3 and ten-eleven translocases. However, the contribution of DNA de novo (de)methylation to these diseases remains almost completely unproven. Broad changes in DNA methylation occurred within days in the renal outer medulla of Dahl SS rats fed a high-salt diet, a classic model of hypertension. Intrarenal administration of anti-DNA methyltransferase 3a/ten-eleven translocase 3 GapmeRs attenuated high salt-induced hypertension in SS rats. The high-salt diet induced differential expression of 1712 genes in the renal outer medulla. Remarkably, the differential expression of 76% of these genes was prevented by anti-DNA methyltransferase 3a/ten-eleven translocase 3 GapmeRs. The genes differentially expressed in response to the GapmeRs were involved in the regulation of metabolism and inflammation and were significantly enriched for genes showing differential methylation in response to the GapmeRs. These data indicate a significant role of DNA de novo (de)methylation in the kidney in the development of hypertension in SS rats. The findings should help to shift the paradigm of DNA methylation research in diseases involving nondividing cells from correlative analysis to functional and mechanistic studies.
Collapse
Affiliation(s)
- Pengyuan Liu
- Sir Run Run Shaw Hospital and Institute of Translational Medicine, Zhejiang University, Zhejiang, China
- Center of Systems Molecular Medicine, Department of Physiology, Medical College of Wisconsin, Milwaukee, WI 53226
| | - Yong Liu
- Center of Systems Molecular Medicine, Department of Physiology, Medical College of Wisconsin, Milwaukee, WI 53226
| | - Han Liu
- Division of Nephrology, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research, Guangzhou, China
| | - Xiaoqing Pan
- Center of Systems Molecular Medicine, Department of Physiology, Medical College of Wisconsin, Milwaukee, WI 53226
| | - Yingchuan Li
- Center of Systems Molecular Medicine, Department of Physiology, Medical College of Wisconsin, Milwaukee, WI 53226
- Department of Critical Care Medicine, Shanghai JiaoTong University affiliated The Sixth People‧s Hospital, Shanghai, China
| | - Kristie Usa
- Center of Systems Molecular Medicine, Department of Physiology, Medical College of Wisconsin, Milwaukee, WI 53226
| | - Manoj K. Mishra
- Center of Systems Molecular Medicine, Department of Physiology, Medical College of Wisconsin, Milwaukee, WI 53226
| | - Jing Nie
- Division of Nephrology, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research, Guangzhou, China
| | - Mingyu Liang
- Center of Systems Molecular Medicine, Department of Physiology, Medical College of Wisconsin, Milwaukee, WI 53226
- Division of Nephrology, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research, Guangzhou, China
| |
Collapse
|
9
|
Liu Y, Usa K, Wang F, Liu P, Geurts AM, Li J, Williams AM, Regner KR, Kong Y, Liu H, Nie J, Liang M. MicroRNA-214-3p in the Kidney Contributes to the Development of Hypertension. J Am Soc Nephrol 2018; 29:2518-2528. [PMID: 30049682 PMCID: PMC6171279 DOI: 10.1681/asn.2018020117] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Accepted: 06/26/2018] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND In spite of extensive study, the mechanisms for salt sensitivity of BP in humans and rodent models remain poorly understood. Several microRNAs (miRNAs) have been associated with hypertension, but few have been shown to contribute to its development. METHODS We examined miRNA expression profiles in human kidney biopsy samples and rat models using small RNA deep sequencing. To inhibit an miRNA specifically in the kidney in conscious, freely moving rats, we placed indwelling catheters to allow both renal interstitial administration of a specific anti-miR and measurement of BP. A rat with heterozygous disruption of the gene encoding endothelial nitric oxide synthase (eNOS) was developed. We used bioinformatic analysis to evaluate the relationship between 283 BP-associated human single-nucleotide polymorphisms (SNPs) and 1870 human miRNA precursors, as well as other molecular and cellular methods. RESULTS Compared with salt-insensitive SS.13BN26 rats, Dahl salt-sensitive (SS) rats showed an upregulation of miR-214-3p, encoded by a gene in the SS.13BN26 congenic region. Kidney-specific inhibition of miR-214-3p significantly attenuated salt-induced hypertension and albuminuria in SS rats. miR-214-3p directly targeted eNOS. The effect of miR-214-3p inhibition on hypertension and albuminuria was abrogated in SS rats with heterozygous loss of eNOS. Human kidney biopsy specimens from patients with hypertension or hypertensive nephrosclerosis showed upregulation of miR-214-3p; the gene encoding miR-214-3p was one of several differentially expressed miRNA genes located in proximity to human BP-associated SNPs. CONCLUSIONS Renal miR-214-3p plays a functional and potentially genetic role in the development of hypertension, which might be mediated in part by targeting eNOS.
Collapse
Affiliation(s)
- Yong Liu
- Center of Systems Molecular Medicine, Department of Physiology
| | - Kristie Usa
- Center of Systems Molecular Medicine, Department of Physiology
| | - Feng Wang
- Center of Systems Molecular Medicine, Department of Physiology
- Department of Nephrology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China; and
| | - Pengyuan Liu
- Center of Systems Molecular Medicine, Department of Physiology
- Cancer Center
| | - Aron M Geurts
- Center of Systems Molecular Medicine, Department of Physiology
- Human and Molecular Genetics Center, and
| | - Junhui Li
- Center of Systems Molecular Medicine, Department of Physiology
- Department of Nephrology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China; and
| | | | - Kevin R Regner
- Division of Nephrology, Department of Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Yiwei Kong
- Center of Systems Molecular Medicine, Department of Physiology
- Department of Nephrology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China; and
| | - Han Liu
- Division of Nephrology, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research, Guangzhou, China
| | - Jing Nie
- Division of Nephrology, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research, Guangzhou, China
| | - Mingyu Liang
- Center of Systems Molecular Medicine, Department of Physiology,
- Division of Nephrology, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research, Guangzhou, China
| |
Collapse
|
10
|
Huang B, Cheng Y, Usa K, Liu Y, Baker MA, Mattson DL, He Y, Wang N, Liang M. Renal Tumor Necrosis Factor α Contributes to Hypertension in Dahl Salt-Sensitive Rats. Sci Rep 2016; 6:21960. [PMID: 26916681 PMCID: PMC4768148 DOI: 10.1038/srep21960] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2015] [Accepted: 02/03/2016] [Indexed: 02/08/2023] Open
Abstract
Tumor necrosis factor α (TNFα) is a major proinflammatory cytokine and its level is elevated in hypertensive states. Inflammation occurs in the kidneys during the development of hypertension. We hypothesized that TNFα specifically in the kidney contributes to the development of hypertension and renal injury in Dahl salt-sensitive (SS) rats, a widely used model of human salt-sensitive hypertension and renal injury. SS rats were chronically instrumented for renal interstitial infusion and blood pressure measurement in conscious, freely moving state. Gene expression was measured using real-time PCR and renal injury assessed with histological analysis. The abundance of TNFα in the renal medulla of SS rats, but not the salt-insensitive congenic SS.13BN26 rats, was significantly increased when rats had been fed a high-salt diet for 7 days (n = 6 or 9, p < 0.01). The abundance of TNFα receptors in the renal medulla was significantly higher in SS rats than SS.13BN26 rats. Renal interstitial administration of Etanercept, an inhibitor of TNFα, significantly attenuated the development of hypertension in SS rats on a high-salt diet (n = 7–8, p < 0.05). Glomerulosclerosis and interstitial fibrosis were also significantly ameliorated. These findings indicate intrarenal TNFα contributes to the development of hypertension and renal injury in SS rats.
Collapse
Affiliation(s)
- Baorui Huang
- Department of Nephrology and Rheumatology, Shanghai Jiaotong University Affiliated Sixth People's Hospital, Shanghai, P.R.China.,Medical College of Soochow University, Suzhou, Jiangsu, P.R.China.,Department of Physiology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Yuan Cheng
- Center of Systems Molecular Medicine, Milwaukee, WI, USA.,Department of Physiology, Medical College of Wisconsin, Milwaukee, WI, USA.,Department of Nephrology, Shenzhen Second People's Hospital and the First Affiliated Hospital of Shenzhen University, Shenzhen, China
| | - Kristie Usa
- Center of Systems Molecular Medicine, Milwaukee, WI, USA.,Department of Physiology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Yong Liu
- Center of Systems Molecular Medicine, Milwaukee, WI, USA.,Department of Physiology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Maria Angeles Baker
- Center of Systems Molecular Medicine, Milwaukee, WI, USA.,Department of Physiology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - David L Mattson
- Department of Physiology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Yongcheng He
- Department of Nephrology, Shenzhen Second People's Hospital and the First Affiliated Hospital of Shenzhen University, Shenzhen, China
| | - Niansong Wang
- Department of Nephrology and Rheumatology, Shanghai Jiaotong University Affiliated Sixth People's Hospital, Shanghai, P.R.China
| | - Mingyu Liang
- Center of Systems Molecular Medicine, Milwaukee, WI, USA.,Department of Physiology, Medical College of Wisconsin, Milwaukee, WI, USA
| |
Collapse
|
11
|
Cowley AW, Yang C, Zheleznova NN, Staruschenko A, Kurth T, Rein L, Kumar V, Sadovnikov K, Dayton A, Hoffman M, Ryan RP, Skelton MM, Salehpour F, Ranji M, Geurts A. Evidence of the Importance of Nox4 in Production of Hypertension in Dahl Salt-Sensitive Rats. Hypertension 2015; 67:440-50. [PMID: 26644237 DOI: 10.1161/hypertensionaha.115.06280] [Citation(s) in RCA: 77] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Accepted: 11/11/2015] [Indexed: 12/24/2022]
Abstract
This study reports the consequences of knocking out NADPH (nicotinamide adenine dinucleotide phosphate) oxidase 4 (Nox4) on the development of hypertension and kidney injury in the Dahl salt-sensitive (SS) rat. Zinc finger nuclease injection of single-cell SS embryos was used to create an 8 base-pair frame-shift deletion of Nox4, resulting in a loss of the ≈68 kDa band in Western blot analysis of renal cortical tissue of the knock out of Nox4 in the SS rat (SS(Nox4-/-)) rats. SS(Nox4-/-) rats exhibited a significant reduction of salt-induced hypertension compared with SS rats after 21 days of 4.0% NaCl diet (134±5 versus 151±3 mm Hg in SS) and a significant reduction of albuminuria, tubular casts, and glomerular injury. Optical fluorescence 3-dimensional cryoimaging revealed significantly higher redox ratios (NADH/FAD [reduced nicotinamide adenine dinucleotide/flavin adenine dinucleotide]) in the kidneys of SS(Nox4-/-) rats even when fed the 0.4% NaCl diet, indicating greater levels of mitochondrial electron transport chain metabolic activity and reduced oxidative stress compared with SS rats. Before the development of hypertension, RNA expression levels of Nox subunits Nox2, p67(phox), and p22(phox) were found to be significantly lower (P<0.05) in SS(Nox4-/-) compared with SS rats in the renal cortex. Thus, the mutation of Nox4 seems to modify transcription of several genes in ways that contribute to the protective effects observed in the SS(Nox4-/-) rats. We conclude that the reduced renal injury and attenuated blood pressure response to high salt in the SS(Nox4-/-) rat could be the result of multiple pathways, including gene transcription, mitochondrial energetics, oxidative stress, and protein matrix production impacted by the knock out of Nox4.
Collapse
Affiliation(s)
- Allen W Cowley
- From the Department of Physiology (A.W.C., C.Y., N.N.Z., A.S., T.K., V.K., K.S., A.D., M.H., R.P.R., M.M.S., A.G.) and Division of Biostatistics, Institute for Health & Society (L.R.), Medical College of Wisconsin, Milwaukee; and Biophotonics Lab, University of Wisconsin, Milwaukee (F.S., M.R.).
| | - Chun Yang
- From the Department of Physiology (A.W.C., C.Y., N.N.Z., A.S., T.K., V.K., K.S., A.D., M.H., R.P.R., M.M.S., A.G.) and Division of Biostatistics, Institute for Health & Society (L.R.), Medical College of Wisconsin, Milwaukee; and Biophotonics Lab, University of Wisconsin, Milwaukee (F.S., M.R.)
| | - Nadezhda N Zheleznova
- From the Department of Physiology (A.W.C., C.Y., N.N.Z., A.S., T.K., V.K., K.S., A.D., M.H., R.P.R., M.M.S., A.G.) and Division of Biostatistics, Institute for Health & Society (L.R.), Medical College of Wisconsin, Milwaukee; and Biophotonics Lab, University of Wisconsin, Milwaukee (F.S., M.R.)
| | - Alexander Staruschenko
- From the Department of Physiology (A.W.C., C.Y., N.N.Z., A.S., T.K., V.K., K.S., A.D., M.H., R.P.R., M.M.S., A.G.) and Division of Biostatistics, Institute for Health & Society (L.R.), Medical College of Wisconsin, Milwaukee; and Biophotonics Lab, University of Wisconsin, Milwaukee (F.S., M.R.)
| | - Theresa Kurth
- From the Department of Physiology (A.W.C., C.Y., N.N.Z., A.S., T.K., V.K., K.S., A.D., M.H., R.P.R., M.M.S., A.G.) and Division of Biostatistics, Institute for Health & Society (L.R.), Medical College of Wisconsin, Milwaukee; and Biophotonics Lab, University of Wisconsin, Milwaukee (F.S., M.R.)
| | - Lisa Rein
- From the Department of Physiology (A.W.C., C.Y., N.N.Z., A.S., T.K., V.K., K.S., A.D., M.H., R.P.R., M.M.S., A.G.) and Division of Biostatistics, Institute for Health & Society (L.R.), Medical College of Wisconsin, Milwaukee; and Biophotonics Lab, University of Wisconsin, Milwaukee (F.S., M.R.)
| | - Vikash Kumar
- From the Department of Physiology (A.W.C., C.Y., N.N.Z., A.S., T.K., V.K., K.S., A.D., M.H., R.P.R., M.M.S., A.G.) and Division of Biostatistics, Institute for Health & Society (L.R.), Medical College of Wisconsin, Milwaukee; and Biophotonics Lab, University of Wisconsin, Milwaukee (F.S., M.R.)
| | - Katherine Sadovnikov
- From the Department of Physiology (A.W.C., C.Y., N.N.Z., A.S., T.K., V.K., K.S., A.D., M.H., R.P.R., M.M.S., A.G.) and Division of Biostatistics, Institute for Health & Society (L.R.), Medical College of Wisconsin, Milwaukee; and Biophotonics Lab, University of Wisconsin, Milwaukee (F.S., M.R.)
| | - Alex Dayton
- From the Department of Physiology (A.W.C., C.Y., N.N.Z., A.S., T.K., V.K., K.S., A.D., M.H., R.P.R., M.M.S., A.G.) and Division of Biostatistics, Institute for Health & Society (L.R.), Medical College of Wisconsin, Milwaukee; and Biophotonics Lab, University of Wisconsin, Milwaukee (F.S., M.R.)
| | - Matthew Hoffman
- From the Department of Physiology (A.W.C., C.Y., N.N.Z., A.S., T.K., V.K., K.S., A.D., M.H., R.P.R., M.M.S., A.G.) and Division of Biostatistics, Institute for Health & Society (L.R.), Medical College of Wisconsin, Milwaukee; and Biophotonics Lab, University of Wisconsin, Milwaukee (F.S., M.R.)
| | - Robert P Ryan
- From the Department of Physiology (A.W.C., C.Y., N.N.Z., A.S., T.K., V.K., K.S., A.D., M.H., R.P.R., M.M.S., A.G.) and Division of Biostatistics, Institute for Health & Society (L.R.), Medical College of Wisconsin, Milwaukee; and Biophotonics Lab, University of Wisconsin, Milwaukee (F.S., M.R.)
| | - Meredith M Skelton
- From the Department of Physiology (A.W.C., C.Y., N.N.Z., A.S., T.K., V.K., K.S., A.D., M.H., R.P.R., M.M.S., A.G.) and Division of Biostatistics, Institute for Health & Society (L.R.), Medical College of Wisconsin, Milwaukee; and Biophotonics Lab, University of Wisconsin, Milwaukee (F.S., M.R.)
| | - Fahimeh Salehpour
- From the Department of Physiology (A.W.C., C.Y., N.N.Z., A.S., T.K., V.K., K.S., A.D., M.H., R.P.R., M.M.S., A.G.) and Division of Biostatistics, Institute for Health & Society (L.R.), Medical College of Wisconsin, Milwaukee; and Biophotonics Lab, University of Wisconsin, Milwaukee (F.S., M.R.)
| | - Mahsa Ranji
- From the Department of Physiology (A.W.C., C.Y., N.N.Z., A.S., T.K., V.K., K.S., A.D., M.H., R.P.R., M.M.S., A.G.) and Division of Biostatistics, Institute for Health & Society (L.R.), Medical College of Wisconsin, Milwaukee; and Biophotonics Lab, University of Wisconsin, Milwaukee (F.S., M.R.)
| | - Aron Geurts
- From the Department of Physiology (A.W.C., C.Y., N.N.Z., A.S., T.K., V.K., K.S., A.D., M.H., R.P.R., M.M.S., A.G.) and Division of Biostatistics, Institute for Health & Society (L.R.), Medical College of Wisconsin, Milwaukee; and Biophotonics Lab, University of Wisconsin, Milwaukee (F.S., M.R.)
| |
Collapse
|
12
|
Cowley AW, Yang C, Kumar V, Lazar J, Jacob H, Geurts AM, Liu P, Dayton A, Kurth T, Liang M. Pappa2 is linked to salt-sensitive hypertension in Dahl S rats. Physiol Genomics 2015; 48:62-72. [PMID: 26534937 DOI: 10.1152/physiolgenomics.00097.2015] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Accepted: 10/29/2015] [Indexed: 01/11/2023] Open
Abstract
A 1.37 Mbp region of chromosome 13 previously identified by exclusion mapping was consistently associated with a reduction of salt-induced hypertension in the Dahl salt-sensitive (SS) rat. This region contained five genes that were introgressed from the salt-insensitive Brown Norway (BN) rat. The goal of the present study was to further narrow that region to identify the gene(s) most likely to protect from salt-induced hypertension. The studies yielded a subcongenic SS rat strain containing a 0.71 Mbp insert from BN (26-P strain) in which salt-induced hypertension was reduced by 24 mmHg. The region contained two protein-coding genes (Astn1 and Pappa2) and a microRNA (miR-488). Pappa2 mRNA in the renal cortex of the protected 26-P was 6- to 10-fold greater than in SS fed a 0.4% NaCl diet but was reduced to levels observed in SS when fed 8.0% NaCl diet for 7 days. Compared with brain nuclei (NTS, RVLM, CVLM) and the adrenal gland, Pappa2 in the renal cortex was the only gene found to be differentially expressed between SS and 26-P and that responded to changes of salt diet. Immunohistochemistry studies found Pappa2 localized in the cytosol of the epithelial cells of the cortical thick ascending limbs. In more distal segments of the renal tubules, it was observed within tubular lumens and most notably bound to the apical membranes of the intercalated cells of collecting ducts. We conclude that we have identified a variant form of Pappa2 that can protect against salt-induced hypertension in the Dahl S rat.
Collapse
Affiliation(s)
- Allen W Cowley
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin;
| | - Chun Yang
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Vikash Kumar
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Jozef Lazar
- Human and Molecular Genetics Center, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Howard Jacob
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin; Human and Molecular Genetics Center, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Aron M Geurts
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin; Cardiovascular Center, Medical College of Wisconsin, Milwaukee, Wisconsin; and
| | - Pengyuan Liu
- Cancer Center, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Alex Dayton
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Theresa Kurth
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Mingyu Liang
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
| |
Collapse
|
13
|
Evans LC, Ryan RP, Broadway E, Skelton MM, Kurth T, Cowley AW. Null mutation of the nicotinamide adenine dinucleotide phosphate-oxidase subunit p67phox protects the Dahl-S rat from salt-induced reductions in medullary blood flow and glomerular filtration rate. Hypertension 2015; 65:561-8. [PMID: 25489057 PMCID: PMC4326559 DOI: 10.1161/hypertensionaha.114.04468] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2014] [Accepted: 11/10/2014] [Indexed: 12/24/2022]
Abstract
Null mutations in the p67(phox) subunit of nicotinamide adenine dinucleotide phosphate-oxidase confer protection from salt sensitivity on Dahl salt-sensitive rats. Here, we track the sequential changes in medullary blood flow (MBF), glomerular filtration rate (GFR), urinary protein, and mean arterial pressure in SSp67(phox) null rats and wild-type littermates during 21 days of 4.0% NaCl high-salt (HS) diet. Optical fibers were implanted in the renal medulla and MBF was measured in conscious rats by laser Doppler flowmetry. Separate groups of rats were prepared with femoral venous catheters and GFR was measured by the transcutaneous assessment of fluorescein isothiocyanate-sinistrin disappearance curves. Mean arterial blood pressure was measured by telemetry. In wild-type rats, HS caused a rapid reduction in MBF, which was significantly lower than control values by HS day-6. Reduced MBF was associated with a progressive increase in mean arterial pressure, averaging 170±5 mm Hg by HS salt day-21. A significant reduction in GFR was evident on day-14 HS, after the onset of hypertension and reduced MBF. In contrast, HS had no significant effect on MBF in SSp67(phox) null rats and the pressor response to sodium was blunted, averaging 150±3 mm Hg on day-21 HS. GFR was maintained throughout the study and proteinuria was reduced. In summary, when p67(phox) is not functional in the salt-sensitive rats, HS does not cause reduced MBF and salt-sensitive hypertension is attenuated, and consequently renal injury is reduced and GFR is maintained.
Collapse
Affiliation(s)
- Louise C Evans
- From the Department of Physiology, Medical College of Wisconsin, Milwaukee
| | - Robert P Ryan
- From the Department of Physiology, Medical College of Wisconsin, Milwaukee
| | - Elizabeth Broadway
- From the Department of Physiology, Medical College of Wisconsin, Milwaukee
| | - Meredith M Skelton
- From the Department of Physiology, Medical College of Wisconsin, Milwaukee
| | - Theresa Kurth
- From the Department of Physiology, Medical College of Wisconsin, Milwaukee
| | - Allen W Cowley
- From the Department of Physiology, Medical College of Wisconsin, Milwaukee.
| |
Collapse
|
14
|
Characteristics of long non-coding RNAs in the Brown Norway rat and alterations in the Dahl salt-sensitive rat. Sci Rep 2014; 4:7146. [PMID: 25413633 PMCID: PMC4894415 DOI: 10.1038/srep07146] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2014] [Accepted: 10/31/2014] [Indexed: 12/03/2022] Open
Abstract
Long non-coding RNAs (lncRNAs) are potentially important mediators of genomic regulation. lncRNAs, however, remain poorly characterized in the rat model organism widely used in biomedical research. Using poly(A)-independent and strand-specific RNA-seq, we identified 1,500 to 1,800 lncRNAs expressed in each of the following tissues of Brown Norway rats: the renal cortex, renal outer medulla, liver, cardiac left ventricle, adrenal gland, and hypothalamus. Expression and the binding of histone H3K4me3 to promoter regions were confirmed for several lncRNAs. Rat lncRNA expression appeared to be more tissue-specific than mRNA. Rat lncRNAs had 4.5 times fewer exons and 29% shorter transcripts than mRNA. The median cumulative abundance of rat lncRNAs was 53% of that of mRNA. Approximately 28% of the lncRNAs identified in the renal outer medulla appeared to lack a poly(A) tail. Differential expression of 74 lncRNAs was detected in the renal outer medulla between Dahl SS rats, a model of salt-sensitive hypertension, and salt-insensitive, congenic SS.13BN26 rats fed a high-salt diet. Two of the differentially expressed lncRNAs, which were confirmed, were located within the congenic region and contained several sequence variants. The study identified genome-wide characteristics of lncRNAs in the rat model and suggested a role of lncRNAs in hypertension.
Collapse
|
15
|
Abstract
Multiple genes and pathways are involved in the pathogenesis of hypertension. Epigenomic studies of hypertension are beginning to emerge and hold great promise of providing novel insights into the mechanisms underlying hypertension. Epigenetic marks or mediators including DNA methylation, histone modifications, and noncoding RNA can be studied at a genome or near-genome scale using epigenomic approaches. At the single gene level, several studies have identified changes in epigenetic modifications in genes expressed in the kidney that correlate with the development of hypertension. Systematic analysis and integration of epigenetic marks at the genome-wide scale, demonstration of cellular and physiological roles of specific epigenetic modifications, and investigation of inheritance are among the major challenges and opportunities for future epigenomic and epigenetic studies of hypertension.
Collapse
Affiliation(s)
- Mingyu Liang
- Department of Physiology, Medical College of Wisconsin, Milwaukee, WI.
| | | | | | | | | |
Collapse
|
16
|
Cowley AW, Moreno C, Jacob HJ, Peterson CB, Stingo FC, Ahn KW, Liu P, Vannucci M, Laud PW, Reddy P, Lazar J, Evans L, Yang C, Kurth T, Liang M. Characterization of biological pathways associated with a 1.37 Mbp genomic region protective of hypertension in Dahl S rats. Physiol Genomics 2014; 46:398-410. [PMID: 24714719 DOI: 10.1152/physiolgenomics.00179.2013] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The goal of the present study was to narrow a region of chromosome 13 to only several genes and then apply unbiased statistical approaches to identify molecular networks and biological pathways relevant to blood-pressure salt sensitivity in Dahl salt-sensitive (SS) rats. The analysis of 13 overlapping subcongenic strains identified a 1.37 Mbp region on chromosome 13 that influenced the mean arterial blood pressure by at least 25 mmHg in SS rats fed a high-salt diet. DNA sequencing and analysis filled genomic gaps and provided identification of five genes in this region, Rfwd2, Fam5b, Astn1, Pappa2, and Tnr. A cross-platform normalization of transcriptome data sets obtained from our previously published Affymetrix GeneChip dataset and newly acquired RNA-seq data from renal outer medullary tissue provided 90 observations for each gene. Two Bayesian methods were used to analyze the data: 1) a linear model analysis to assess 243 biological pathways for their likelihood to discriminate blood pressure levels across experimental groups and 2) a Bayesian graphical modeling of pathways to discover genes with potential relationships to the candidate genes in this region. As none of these five genes are known to be involved in hypertension, this unbiased approach has provided useful clues to be experimentally explored. Of these five genes, Rfwd2, the gene most strongly expressed in the renal outer medulla, was notably associated with pathways that can affect blood pressure via renal transcellular Na(+) and K(+) electrochemical gradients and tubular Na(+) transport, mitochondrial TCA cycle and cell energetics, and circadian rhythms.
Collapse
Affiliation(s)
- Allen W Cowley
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin;
| | - Carol Moreno
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin; Human and Molecular Genetics Center, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Howard J Jacob
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin; Human and Molecular Genetics Center, Medical College of Wisconsin, Milwaukee, Wisconsin
| | | | - Francesco C Stingo
- Department of Biostatistics, MD Anderson Cancer Center, Houston, Texas; and
| | - Kwang Woo Ahn
- Division of Biostatistics, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Pengyuan Liu
- Cancer Center, Medical College of Wisconsin, Milwaukee, Wisconsin
| | | | - Purushottam W Laud
- Division of Biostatistics, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Prajwal Reddy
- Human and Molecular Genetics Center, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Jozef Lazar
- Human and Molecular Genetics Center, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Louise Evans
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Chun Yang
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Theresa Kurth
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Mingyu Liang
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
| |
Collapse
|
17
|
He X, Liu Y, Usa K, Tian Z, Cowley AW, Liang M. Ultrastructure of mitochondria and the endoplasmic reticulum in renal tubules of Dahl salt-sensitive rats. Am J Physiol Renal Physiol 2014; 306:F1190-7. [PMID: 24694587 DOI: 10.1152/ajprenal.00073.2014] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Metabolic and functional abnormalities in the kidney precede or coincide with the initiation of overt hypertension in the Dahl salt-sensitive (SS) rat. However, renal histological injury in SS rats is mild before the development of overt hypertension. We performed electron microscopy analysis in 7-wk-old SS rats and salt-insensitive consomic SS.13(BN) rats and Sprague-Dawley (SD) rats fed a 4% NaCl diet for 7 days. Long mitochondria (>2 μm) accounted for a significantly smaller fraction of mitochondria in medullary thick ascending limbs in SS rats (4% ± 1%) than in SS.13(BN) rats (8% ± 1%, P < 0.05 vs. SS rats) and SD rats (9% ± 1%, P < 0.01 vs. SS rats), consistent with previous findings of mitochondrial functional insufficiency in the medulla of SS rats. Long mitochondria in proximal tubules, however, were more abundant in SS rats than in SS.13(BN) and SD rats. The width of the endoplasmic reticulum, an index of endoplasmic reticulum stress, was significantly greater in medullary thick ascending limbs of SS rats (107 ± 1 nm) than in SS.13(BN) rats (95 ± 2 nm, P < 0.001 vs. SS rats) and SD rats (74 ± 3 nm, P < 0.01 vs. SS or SS.13(BN) rats). The tubules examined were indistinguishable between rat strains under light microscopy. These data indicate that ultrastructural abnormalities occur in the medullary thick ascending limbs of SS rats before the development of histological injury in renal tubules, providing a potential structural basis contributing to the subsequent development of overt hypertension.
Collapse
Affiliation(s)
- Xiaofeng He
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin; Department of Nephrology, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, Hubei, China; and
| | - Yong Liu
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Kristie Usa
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Zhongmin Tian
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Allen W Cowley
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Mingyu Liang
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin;
| |
Collapse
|
18
|
Liu Y, Liu P, Yang C, Cowley AW, Liang M. Base-resolution maps of 5-methylcytosine and 5-hydroxymethylcytosine in Dahl S rats: effect of salt and genomic sequence. Hypertension 2014; 63:827-38. [PMID: 24420542 DOI: 10.1161/hypertensionaha.113.02637] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Analysis of 5-hydroxymethylcytosine (5hmC) at single-base resolution has been largely limited to studies of stem cells or developmental stages. Given the potential importance of epigenetic events in hypertension, we have analyzed 5hmC and 5-methylcytosine (5mC) at single-base resolution in the renal outer medulla of the Dahl salt-sensitive rat and examined the effect of disease-relevant genetic or environmental alterations on 5hmC and 5mC patterns. Of CpG sites that fell within CpG islands, 11% and 1% contained significant 5mC and 5hmC, respectively. 5mC levels were substantially higher for genes with lower mRNA abundance and showed a prominent nadir around the transcription start site. In contrast, 5hmC levels were higher in genes with higher expression. Substitution of a 12.9-Mbp region of chromosome 13, which attenuates the hypertensive and renal injury phenotypes in salt-sensitive rats, or exposure to a high-salt diet, which accelerates the disease phenotypes, was associated with differential 5mC or 5hmC in several hundred CpG islands. Nearly 80% of the CpG islands that were differentially methylated in response to salt and associated with differential mRNA abundance were intragenic CpG islands. The substituted genomic segment had significant cis effects on mRNA abundance but not on DNA methylation. The study established base-resolution maps of 5mC and 5hmC in an in vivo model of disease and revealed several characteristics of 5mC and 5hmC important for understanding the role of epigenetic modifications in the regulation of organ systems function and complex diseases.
Collapse
Affiliation(s)
- Yong Liu
- Department of Physiology, Medical College of Wisconsin, Milwaukee, WI 53226. or
| | | | | | | | | |
Collapse
|
19
|
|
20
|
Flister MJ, Hoffman MJ, Reddy P, Jacob HJ, Moreno C. Congenic mapping and sequence analysis of the Renin locus. Hypertension 2013; 61:850-6. [PMID: 23460292 DOI: 10.1161/hypertensionaha.111.01008] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Renin was the first blood pressure (BP) quantitative trait locus mapped by linkage analysis in the rat. Subsequent BP linkage and congenic studies capturing different portions of the renin region have returned conflicting results, suggesting that multiple interdependent BP loci may be residing in the chromosome 13 BP quantitative trait locus that includes Renin. We used SS-13(BN) congenic strains to map 2 BP loci in the Renin region (chr13: 45.2-49.0 Mb). We identified a 1.1-Mb protective Brown Norway region around Renin (chr13: 46.1-47.2 Mb) that significantly decreased BP by 32 mm Hg. The Renin protective BP locus was offset by an adjacent hypertensive locus (chr13: 47.2-49.0 Mb) that significantly increased BP by 29 mm Hg. Sequence analysis of the protective and hypertensive BP loci revealed 1433 and 2063 variants between Dahl salt-sensitive/Mcwi and Brown Norway rats, respectively. To further reduce the list of candidate variants, we regenotyped an overlapping SS-13(SR) congenic strain (S/renrr) with a previously reported BP phenotype. Sequence comparison among Dahl salt-sensitive, Dahl R, and Brown Norway reduced the number of candidate variants in the 2 BP loci by 42% for further study. Combined with previous studies, these data suggest that at least 4 BP loci reside within the 30-cM chromosome 13 BP quantitative trait locus that includes Renin.
Collapse
Affiliation(s)
- Michael J Flister
- Human and Molecular Genetics Center, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | | | | | | | | |
Collapse
|
21
|
Yang C, Stingo FC, Ahn KW, Liu P, Vannucci M, Laud PW, Skelton M, O'Connor P, Kurth T, Ryan RP, Moreno C, Tsaih SW, Patone G, Hummel O, Jacob HJ, Liang M, Cowley AW. Increased proliferative cells in the medullary thick ascending limb of the loop of Henle in the Dahl salt-sensitive rat. Hypertension 2012. [PMID: 23184381 DOI: 10.1161/hypertensionaha.112.199380] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Studies of transcriptome profiles have provided new insights into mechanisms underlying the development of hypertension. Cell type heterogeneity in tissue samples, however, has been a significant hindrance in these studies. We performed a transcriptome analysis in medullary thick ascending limbs of the loop of Henle isolated from Dahl salt-sensitive rats. Genes differentially expressed between Dahl salt-sensitive rats and salt-insensitive consomic SS.13(BN) rats on either 0.4% or 7 days of 8.0% NaCl diet (n=4) were highly enriched for genes located on chromosome 13, the chromosome substituted in the SS.13(BN) rat. A pathway involving cell proliferation and cell cycle regulation was identified as one of the most highly ranked pathways based on differentially expressed genes and by a Bayesian model analysis. Immunofluorescent analysis indicated that just 1 week of a high-salt diet resulted in a severalfold increase in proliferative medullary thick ascending limb cells in both rat strains, and that Dahl salt-sensitive rats exhibited a significantly greater proportion of medullary thick ascending limb cells in a proliferative state than in SS.13(BN) rats (15.0±1.4% versus 10.1±0.6%; n=7-9; P<0.05). The total number of cells per medullary thick ascending limb section analyzed was not different between the 2 strains. The study revealed alterations in regulatory pathways in Dahl salt-sensitive rats in tissues highly enriched for a single cell type, leading to the unexpected finding of a greater increase in the number of proliferative medullary thick ascending limb cells in Dahl salt-sensitive rats on a high-salt diet.
Collapse
Affiliation(s)
- Chun Yang
- Department of Physiology, Medical College of Wisconsin, Milwaukee, WI, USA
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
22
|
Zheleznova NN, Yang C, Ryan RP, Halligan BD, Liang M, Greene AS, Cowley AW. Mitochondrial proteomic analysis reveals deficiencies in oxygen utilization in medullary thick ascending limb of Henle in the Dahl salt-sensitive rat. Physiol Genomics 2012; 44:829-42. [PMID: 22805345 DOI: 10.1152/physiolgenomics.00060.2012] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The renal medullary thick ascending limb (mTAL) of the Dahl salt-sensitive (SS) rat is the site of enhanced NaCl reabsorption and excess superoxide production. In the present studies we isolated mitochondria from mTAL of SS and salt-resistant control strain SS.13(BN) rats on 0.4 and 8% salt diet for 7 days and performed a proteomic analysis. Purity of mTAL and mitochondria isolations exceeded 93.6 and 55%, respectively. Using LC/MS spectral analysis techniques we identified 96 mitochondrial proteins in four biological mTAL mitochondria samples, run in duplicate, as defined by proteins with a false discovery rate <5% and scan count ≥2. Seven of these 96 proteins, including IDH2, ACADM, SCOT, Hsp60, ATPA, EFTu, and VDAC2 were differentially expressed between the two rat strains. Oxygen consumption and high-resolution respirometry analyses showed that mTAL cells and the mitochondria in the outer medulla of SS rats fed high-salt diet exhibited lower rates of oxygen utilization compared with those from SS.13(BN) rats. These studies advance the conventional proteomic paradigm of focusing exclusively upon whole tissue homogenates to a focus upon a single cell type and specific subcellular organelle. The results reveal the importance of a largely unexplored role for deficiencies of mTAL mitochondrial metabolism and oxygen utilization in salt-induced hypertension and renal medullary oxidative stress.
Collapse
Affiliation(s)
- Nadezhda N Zheleznova
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin 53226, USA
| | | | | | | | | | | | | |
Collapse
|
23
|
Affiliation(s)
- Bina Joe
- Center for Hypertension and Personalized Medicine, University of Toledo College of Medicine and Life Sciences Toledo, OH (B.J., J.I.S.) ; Department of Physiology/Pharmacology, University of Toledo College of Medicine and Life Sciences Toledo, OH (B.J., J.I.S.)
| | | |
Collapse
|
24
|
Schulz A, Kreutz R. Mapping genetic determinants of kidney damage in rat models. Hypertens Res 2012; 35:675-94. [DOI: 10.1038/hr.2012.77] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
|
25
|
Feng D, Yang C, Geurts AM, Kurth T, Liang M, Lazar J, Mattson DL, O'Connor PM, Cowley AW. Increased expression of NAD(P)H oxidase subunit p67(phox) in the renal medulla contributes to excess oxidative stress and salt-sensitive hypertension. Cell Metab 2012; 15:201-8. [PMID: 22326221 PMCID: PMC3280886 DOI: 10.1016/j.cmet.2012.01.003] [Citation(s) in RCA: 113] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2011] [Revised: 12/15/2011] [Accepted: 01/06/2012] [Indexed: 12/15/2022]
Abstract
NAD(P)H oxidase has been shown to be important in the development of salt-sensitive hypertension. Here, we show that the expression of a subunit of NAD(P)H oxidase, p67(phox), was increased in response to a high-salt diet in the outer renal medulla of the Dahl salt-sensitive (SS) rat, an animal model for human salt-sensitive hypertension. The higher expression of p67(phox), not the other subunits observed, was associated with higher NAD(P)H oxidase activity and salt sensitivity in SS rats compared with a salt-resistant strain. Genetic mutations of the SS allele of p67(phox) were found in the promoter region and contributed to higher promoter activity than that of the salt-resistant strain. To verify the importance of p67(phox), we disrupted p67(phox) in SS rats using zinc-finger nucleases. These rats exhibited a significant reduction of salt-sensitive hypertension and renal medullary oxidative stress and injury. p67(phox) could represent a target for salt-sensitive hypertension therapy.
Collapse
Affiliation(s)
- Di Feng
- Physiology Department, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | | | | | | | | | | | | | | | | |
Collapse
|
26
|
Kriegel AJ, Liu Y, Fang Y, Ding X, Liang M. The miR-29 family: genomics, cell biology, and relevance to renal and cardiovascular injury. Physiol Genomics 2012; 44:237-44. [PMID: 22214600 DOI: 10.1152/physiolgenomics.00141.2011] [Citation(s) in RCA: 376] [Impact Index Per Article: 31.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
The human miR-29 family of microRNAs has three mature members, miR-29a, miR-29b, and miR-29c. miR-29s are encoded by two gene clusters. Binding sites for several transcriptional factors have been identified in the promoter regions of miR-29 genes. The miR-29 family members share a common seed region sequence and are predicted to target largely overlapping sets of genes. However, the miR-29 family members exhibit differential regulation in several cases and different subcellular distribution, suggesting their functional relevance may not be identical. miR-29s directly target at least 16 extracellular matrix genes, providing a dramatic example of a single microRNA targeting a large group of functionally related genes. Strong antifibrotic effects of miR-29s have been demonstrated in heart, kidney, and other organs. miR-29s have also been shown to be proapoptotic and involved in the regulation of cell differentiation. It remains to be explored how various cellular effects of miR-29s determine functional relevance of miR-29s to specific diseases and how the miR-29 family members may function cooperatively or separately.
Collapse
Affiliation(s)
- Alison J Kriegel
- Department of Physiology, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | | | | | | | | |
Collapse
|
27
|
Citterio L, Lanzani C, Manunta P, Bianchi G. Genetics of primary hypertension: The clinical impact of adducin polymorphisms. Biochim Biophys Acta Mol Basis Dis 2010; 1802:1285-98. [DOI: 10.1016/j.bbadis.2010.03.014] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2010] [Revised: 03/26/2010] [Accepted: 03/30/2010] [Indexed: 01/11/2023]
|