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Zhang JQJ, Saravanabavan S, Cheng KM, Raghubanshi A, Chandra AN, Munt A, Rayner B, Zhang Y, Chau K, Wong ATY, Rangan GK. Long-term dietary nitrate supplementation does not reduce renal cyst growth in experimental autosomal dominant polycystic kidney disease. PLoS One 2021; 16:e0248400. [PMID: 33886581 PMCID: PMC8061912 DOI: 10.1371/journal.pone.0248400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Accepted: 02/26/2021] [Indexed: 11/18/2022] Open
Abstract
Augmentation of endogenous nitric oxide (NO) synthesis, either by the classical L-arginine-NO synthase pathway, or the recently discovered entero-salivary nitrate-nitrite-NO system, may slow the progression of autosomal dominant polycystic kidney disease (ADPKD). To test this hypothesis, the expression of NO in human ADPKD cell lines (WT 9–7, WT 9–12), and the effect of L-arginine on an in vitro model of three-dimensional cyst growth using MDCK cells, was examined. In addition, groups of homozygous Pkd1RC/RC mice (a hypomorphic genetic ortholog of ADPKD) received either low, moderate or high dose sodium nitrate (0.1, 1 or 10 mmol/kg/day), or sodium chloride (vehicle; 10 mmol/kg/day), supplemented drinking water from postnatal month 1 to 9 (n = 12 per group). In vitro, intracellular NO, as assessed by DAF-2/DA fluorescence, was reduced by >70% in human ADPKD cell lines, and L-arginine and the NO donor, sodium nitroprusside, both attenuated in vitro cyst growth by up to 18%. In contrast, in Pkd1RC/RC mice, sodium nitrate supplementation increased serum nitrate/nitrite levels by ~25-fold in the high dose group (P<0.001), but kidney enlargement and percentage cyst area was not altered, regardless of dose. In conclusion, L-arginine has mild direct efficacy on reducing renal cyst growth in vitro, whereas long-term sodium nitrate supplementation was ineffective in vivo. These data suggest that the bioconversion of dietary nitrate to NO by the entero-salivary pathway may not be sufficient to influence the progression of renal cyst growth in ADPKD.
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Affiliation(s)
- Jennifer Q. J. Zhang
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, The University of Sydney, Sydney, New South Wales, Australia
- Department of Renal Medicine, Westmead Hospital, Western Sydney Local Health District, Sydney, New South Wales, Australia
| | - Sayanthooran Saravanabavan
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, The University of Sydney, Sydney, New South Wales, Australia
- Department of Renal Medicine, Westmead Hospital, Western Sydney Local Health District, Sydney, New South Wales, Australia
| | - Kai Man Cheng
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, The University of Sydney, Sydney, New South Wales, Australia
- Department of Renal Medicine, Westmead Hospital, Western Sydney Local Health District, Sydney, New South Wales, Australia
| | - Aarya Raghubanshi
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, The University of Sydney, Sydney, New South Wales, Australia
- Department of Renal Medicine, Westmead Hospital, Western Sydney Local Health District, Sydney, New South Wales, Australia
| | - Ashley N. Chandra
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, The University of Sydney, Sydney, New South Wales, Australia
- Department of Renal Medicine, Westmead Hospital, Western Sydney Local Health District, Sydney, New South Wales, Australia
| | - Alexandra Munt
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, The University of Sydney, Sydney, New South Wales, Australia
- Department of Renal Medicine, Westmead Hospital, Western Sydney Local Health District, Sydney, New South Wales, Australia
| | - Benjamin Rayner
- Heart Research Institute, Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia
| | - Yunjia Zhang
- Heart Research Institute, Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia
| | - Katrina Chau
- Department of Renal Medicine and School of Medicine, Western Sydney University at Blacktown Hospital, Sydney, New South Wales, Australia
| | - Annette T. Y. Wong
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, The University of Sydney, Sydney, New South Wales, Australia
- Department of Renal Medicine, Westmead Hospital, Western Sydney Local Health District, Sydney, New South Wales, Australia
| | - Gopala K. Rangan
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, The University of Sydney, Sydney, New South Wales, Australia
- Department of Renal Medicine, Westmead Hospital, Western Sydney Local Health District, Sydney, New South Wales, Australia
- * E-mail:
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K. Rangan G, Raghubanshi A, Chaitarvornkit A, Chandra AN, Gardos R, Munt A, Read MN, Saravanabavan S, Zhang JQ, Wong AT. Current and emerging treatment options to prevent renal failure due to autosomal dominant polycystic kidney disease. Expert Opin Orphan Drugs 2020. [DOI: 10.1080/21678707.2020.1804859] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Gopala K. Rangan
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, The University of Sydney, Westmead, Australia
- Department of Renal Medicine, Westmead Hospital, Western Sydney Local Health District, Westmead, Australia
| | - Aarya Raghubanshi
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, The University of Sydney, Westmead, Australia
| | - Alissa Chaitarvornkit
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, The University of Sydney, Westmead, Australia
- Faculty of Engineering, The University of Sydney, Camperdown, Australia
| | - Ashley N. Chandra
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, The University of Sydney, Westmead, Australia
| | | | - Alexandra Munt
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, The University of Sydney, Westmead, Australia
- Department of Renal Medicine, Westmead Hospital, Western Sydney Local Health District, Westmead, Australia
| | - Mark N. Read
- The School of Computer Science and the Westmead Initiative, The University of Sydney, Westmead, Australia
| | - Sayanthooran Saravanabavan
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, The University of Sydney, Westmead, Australia
| | - Jennifer Q.J. Zhang
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, The University of Sydney, Westmead, Australia
| | - Annette T.Y. Wong
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, The University of Sydney, Westmead, Australia
- Department of Renal Medicine, Westmead Hospital, Western Sydney Local Health District, Westmead, Australia
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Yang Y, Chen M, Zhou J, Lv J, Song S, Fu L, Chen J, Yang M, Mei C. Interactions between Macrophages and Cyst-Lining Epithelial Cells Promote Kidney Cyst Growth in Pkd1-Deficient Mice. J Am Soc Nephrol 2018; 29:2310-2325. [PMID: 30042193 DOI: 10.1681/asn.2018010074] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2018] [Accepted: 06/21/2018] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Autosomal-dominant polycystic kidney disease (ADPKD) is the leading inherited renal disease worldwide. The proproliferative function of macrophages is associated with late-stage cyst enlargement in mice with PKD; however, the way in which macrophages act on cyst-lining epithelial cells (CLECs) has not been well elucidated. METHODS We generated a rapid-onset PKD mouse model by inactivating Pkd1 on postnatal day 10 (P10) and compared cell proliferation and differential gene expression in kidney tissues of the PKD mice and wild-type (WT) littermates. RESULTS The cystic phenotype was dominant from P18. A distinct peak in cell proliferation in polycystic kidneys during P22-P30 was closely related to late-stage cyst growth. Comparisons of gene expression profiles in kidney tissues at P22 and P30 in PKD and WT mice revealed that arginine metabolism was significantly activated; 204 differentially expressed genes (DEGs), including Arg1, an arginine metabolism-associated gene, were identified in late-stage polycystic kidneys. The Arg1-encoded protein, arginase-1 (ARG1), was predominantly expressed in macrophages in a time-dependent manner. Multiple-stage macrophage depletion verified that macrophages expressing high ARG1 levels accounted for late-stage cyst enlargement, and inhibiting ARG1 activity significantly retarded cyst growth and effectively lowered the proliferative indices in polycystic kidneys. In vitro experiments revealed that macrophages stimulated CLEC proliferation, and that L-lactic acid, primarily generated by CLECs, significantly upregulated ARG1 expression and increased polyamine synthesis in macrophages. CONCLUSIONS Interactions between macrophages and CLECs promote cyst growth. ARG1 is a key molecule involved in this process and is a potential therapeutic target to help delay ADPKD progression.
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Affiliation(s)
- Yang Yang
- Division of Nephrology, Kidney Institution of Chinese People's Liberation Army (PLA), Chang Zheng Hospital, The Second Military Medical University, Shanghai, China.,Division of Nephrology, Kidney Diagnostic and Therapeutic Center of PLA, Beidaihe Sanatorium of PLA, Qinhuangdao, China; and
| | - Meihan Chen
- Division of Nephrology, Kidney Institution of Chinese People's Liberation Army (PLA), Chang Zheng Hospital, The Second Military Medical University, Shanghai, China
| | - Jie Zhou
- Division of Nephrology, Kidney Institution of Chinese People's Liberation Army (PLA), Chang Zheng Hospital, The Second Military Medical University, Shanghai, China
| | - Jiayi Lv
- Division of Nephrology, Kidney Institution of Chinese People's Liberation Army (PLA), Chang Zheng Hospital, The Second Military Medical University, Shanghai, China
| | - Shuwei Song
- Division of Nephrology, Kidney Institution of Chinese People's Liberation Army (PLA), Chang Zheng Hospital, The Second Military Medical University, Shanghai, China
| | - LiLi Fu
- Division of Nephrology, Kidney Institution of Chinese People's Liberation Army (PLA), Chang Zheng Hospital, The Second Military Medical University, Shanghai, China
| | - Jiejian Chen
- Division of Nephrology, Kidney Institution of Chinese People's Liberation Army (PLA), Chang Zheng Hospital, The Second Military Medical University, Shanghai, China.,Department of Nephrology, The 175th Hospital of PLA, Zhangzhou, China
| | - Ming Yang
- Division of Nephrology, Kidney Institution of Chinese People's Liberation Army (PLA), Chang Zheng Hospital, The Second Military Medical University, Shanghai, China
| | - Changlin Mei
- Division of Nephrology, Kidney Institution of Chinese People's Liberation Army (PLA), Chang Zheng Hospital, The Second Military Medical University, Shanghai, China;
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