The function of kidney specific (KS)-WNK1 condensates during potassium stress
钾应激期间肾脏特异性 (KS)-WNK1 缩合物的功能
基本信息
- 批准号:10668592
- 负责人:
- 金额:$ 10.84万
- 依托单位:
- 依托单位国家:美国
- 项目类别:
- 财政年份:2018
- 资助国家:美国
- 起止时间:2018-07-01 至 2024-06-30
- 项目状态:已结题
- 来源:
- 关键词:Advisory CommitteesAffectAlanineAnimal ModelAnimalsBinding ProteinsBiologicalBiologyBloodBlood PressureChronic Kidney FailureClustered Regularly Interspaced Short Palindromic RepeatsComplexDataDevelopmentDietDietary PotassiumDiseaseDistal convoluted renal tubule structureDuct (organ) structureEpidemicEquilibriumEvolutionFoundationsFundingGoalsHomeostasisHumanHypertensionHypokalemiaIn VitroIntakeInternationalKidneyKidney DiseasesKnockout MiceLeadLinkLysineMapsMass Spectrum AnalysisMeasuresMembraneMentorsMetabolicMicroscopyMolecularMolecular CloningMonitorMorbidity - disease rateMusMutagenesisMutationOrganellesPathway interactionsPhosphorylationPhosphotransferasesPhysiciansPhysiologicalPhysiologyPlasmaPopulationPotassiumProcessProlineProtein BiochemistryProtein IsoformsProtein KinaseProteinsRNARecommendationRegulationRenal functionResearchResearch PersonnelResourcesRiboTagRibosomesRoleSLC12A3 geneScientistSerumSignal PathwaySignal TransductionSliceSodiumSodium ChlorideStressStructureTechniquesTelemetryTestingTimeTissuesTransgenic MiceUnited States National Institutes of HealthUniversitiesUrineWorkbaseblood pressure elevationblood pressure regulationcareer developmentcostexperiencegain of function mutationhuman modelhyperkalemiain vivoinsightmeetingsmouse modelnovelpressureproteotoxicityrenal tubular transportresponsesensorskillssymportertenure trackthiazidetranscriptome sequencing
项目摘要
PROJECT SUMMARY/ABSTRACT
Potassium [K+]-deficient diets have contributed to the global epidemic of hypertension and chronic kidney
disease (CKD). Given the low cost and ease of increasing dietary [K+], more research is needed to understand
how [K+] imbalance leads to these diseases. The kidneys handle 90% of [K+], and the distal convoluted tubule
(DCT) acts as a [K+] sensor via the WNK-SPAK (With-No-Lysine/Ste20/SPS-1-related proline-alanine-rich
protein kinase) pathway. Gain-of-function mutations to this pathway lead to severe hypertension and
hyperkalemia by activation of the thiazide-sensitive sodium/chloride co-transporter (NCC). Curiously, dietary [K+]
depletion or loading causes the WNK-SPAK kinases to assemble into large DCT-specific cytoplasmic puncta,
that are not seen in mice on normokalemic diets. For years, the structure and function of these condensates,
which we call “WNK bodies”, remained a mystery. Dr. Boyd-Shiwarski’s initial work has identified that these DCT-
specific puncta are (i) dependent upon the expression of kidney specific (KS)-WNK1 (ii) potassium-sensitive;; (iii)
membrane-less;; (iv) not associated with conventional organelles;; and (v) associated with WNK-SPAK proteins.
Based on these findings, we hypothesize that WNK bodies are membrane-less microdomains that sequester the
WNK-SPAK pathway to modulate WNK signaling during potassium imbalance. This hypothesis will be tested in
two aims that evaluate the physiological significance and biological basis of WNK body formation. This proposal’s
physiology-based aim will provide Dr. Boyd-Shiwarski with the opportunity to work with animal models and (i)
implement ex vivo microscopy techniques, (ii) quantify changes in urine, serum, and blood pressure, and (iii)
develop transgenic mouse models. Whereas, the biology-based portion of this proposal will include
implementation of (i) molecular cloning, (ii) protein biochemistry, and (iii) mass spectrometry and RNA Seq.
These skills will be reinforced by a team of mentors, advisors, collaborators, and core resources available at the
University of Pittsburgh. The primary mentor, Dr. Arohan Subramanya, is an established NIH R01-funded
physician-scientist with 13 years of experience in WNK signaling biology and prior experience mentoring over
20 trainees. The co-mentor, Dr. Tom Kleyman, is an internationally recognized physician scientist who directs
the Pittsburgh Center for Kidney Research, and has mentored nine career development awardees and five R01
recipients within the last 10 years. In addition, an advisory committee of accomplished investigators with
expertise in hypertension, WNK-SPAK signaling, and renal tubular transport will monitor Dr. Boyd-Shiwarski’s
progress through biannual meetings. Dr. Boyd-Shiwarski will use this proposal to accomplish her short-term goal
of scientific independence and her long-term goal of becoming a tenure track physician-scientist with expertise
in potassium homeostasis, hypertension, and CKD. The results from this proposal will form the basis for an R01
studying the translational role of KS-WNK1-dependent WNK bodies in human models of nephropathy.
项目总结/摘要
钾[K+]缺乏的饮食导致了高血压和慢性肾脏病的全球流行
考虑到增加膳食[K+]的成本低且容易,需要更多的研究来了解
[K+]失衡如何导致这些疾病。肾脏处理90%的[K+],远曲小管
(DCT)通过WNK-β SPAK(与-β NO-β赖氨酸/Ste 20/SPS-β 1-β相关的脯氨酸-β丙氨酸-β丰富)作为[K+]传感器
蛋白激酶)途径。该途径的获得性高血压功能突变导致严重的高血压,
高钾血症通过激活噻嗪类药物敏感的钠/氯共转运蛋白(NCC)。奇怪的是,饮食[K+]
耗尽或负载导致WNK-1 SPAK激酶组装成大的DCT-T特异性细胞质斑点,
在正常血钾饮食的小鼠中看不到。多年来,这些浓缩物的结构和功能,
我们称之为“WNK体”,仍然是一个谜。博伊德-希瓦斯基博士的初步工作已经确定,这些DCT-
特异性斑点(i)依赖于肾特异性(KS)-KWNK 1的表达;(ii)钾敏感性;
无细胞膜;(iv)与常规细胞器不相关;(v)与WNK-细胞SPAK蛋白相关。
基于这些发现,我们假设WNK小体是无膜微区,
在钾失衡期间,WNK-β SPAK通路调节WNK信号传导。
两个目的,评价WNK体形成的生理意义和生物学基础。
基于生理学的目标将为Boyd-Shiwarski博士提供使用动物模型的机会,并且(i)
实施离体显微镜技术,(ii)量化尿液、血清和血压的变化,以及(iii)
开发转基因小鼠模型。鉴于本提案中基于生物学的部分将包括
实施(i)分子克隆,(ii)蛋白质生物化学,和(iii)质谱和RNA Seq.
这些技能将得到一个由导师、顾问、合作者和核心资源组成的团队的加强。
匹兹堡大学。主要导师,Arohan Subramanya博士,是一个成立的NIH R 01-R 01资助的
医生-生物科学家,在WNK信号传导生物学方面拥有13年的经验,
20名学员。共同导师汤姆·克莱曼博士是一位国际公认的内科科学家,
匹兹堡肾脏研究中心,并指导了9名职业发展获奖者和5名R 01
在过去10年内,接受者。此外,一个由有成就的调查人员组成的咨询委员会,
高血压,WNK-SPAK信号传导和肾小管转运方面的专业知识将监测Boyd-Shiwarski博士的
Boyd-Shiwarski博士将利用这一建议来实现她的短期目标
她的长期目标是成为一名拥有专业知识的终身制医生和科学家
在钾稳态,高血压和CKD中的作用。该提案的结果将构成R 01的基础
研究KS-β WNK 1-β依赖性WNK体在人类肾病模型中的翻译作用。
项目成果
期刊论文数量(1)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Cary Ragan Boyd-Shiwarski其他文献
Cary Ragan Boyd-Shiwarski的其他文献
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{{ truncateString('Cary Ragan Boyd-Shiwarski', 18)}}的其他基金
The function of kidney specific (KS)-WNK1 condensates during potassium stress
钾应激期间肾脏特异性 (KS)-WNK1 缩合物的功能
- 批准号:
9922267 - 财政年份:2018
- 资助金额:
$ 10.84万 - 项目类别:
The function of kidney specific (KS)-WNK1 condensates during potassium stress
钾应激期间肾脏特异性 (KS)-WNK1 缩合物的功能
- 批准号:
10397071 - 财政年份:2018
- 资助金额:
$ 10.84万 - 项目类别:
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