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  1. Article ; Online: Magnesium reabsorption in the kidney.

    de Baaij, Jeroen H F

    American journal of physiology. Renal physiology

    2023  Volume 324, Issue 3, Page(s) F227–F244

    Abstract: ... ...

    Abstract Mg
    MeSH term(s) Animals ; Mice ; Humans ; TRPM Cation Channels/genetics ; TRPM Cation Channels/metabolism ; Magnesium/metabolism ; Kidney Tubules, Distal/metabolism ; Kidney Tubules, Proximal/metabolism ; Signal Transduction ; Protein Serine-Threonine Kinases/metabolism
    Chemical Substances TRPM Cation Channels ; Magnesium (I38ZP9992A) ; TRPM7 protein, human (EC 2.7.11.1) ; Protein Serine-Threonine Kinases (EC 2.7.11.1) ; Trpm7 protein, mouse (EC 2.7.1.-)
    Language English
    Publishing date 2023-01-12
    Publishing country United States
    Document type Journal Article ; Review ; Research Support, Non-U.S. Gov't
    ZDB-ID 603837-2
    ISSN 1522-1466 ; 0363-6127
    ISSN (online) 1522-1466
    ISSN 0363-6127
    DOI 10.1152/ajprenal.00298.2022
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: mTOR signaling in renal ion transport.

    Adella, Anastasia / de Baaij, Jeroen H F

    Acta physiologica (Oxford, England)

    2023  Volume 238, Issue 1, Page(s) e13960

    Abstract: The mammalian target of rapamycin (mTOR) signaling pathway is crucial in maintaining cell growth and metabolism. The mTOR protein kinase constitutes the catalytic subunit of two multimeric protein complexes called mTOR complex 1 (mTORC1) and mTOR complex ...

    Abstract The mammalian target of rapamycin (mTOR) signaling pathway is crucial in maintaining cell growth and metabolism. The mTOR protein kinase constitutes the catalytic subunit of two multimeric protein complexes called mTOR complex 1 (mTORC1) and mTOR complex 2 (mTORC2). As such, this pathway is indispensable for many organs, including the kidney. Since its discovery, mTOR has been associated with major renal disorders such as acute kidney injury, chronic kidney disease, and polycystic kidney disease. On top of that, emerging studies using pharmacological interventions and genetic disease models have unveiled mTOR role in renal tubular ion handling. Along the tubule, mTORC1 and mTORC2 subunits are ubiquitously expressed at mRNA level. Nevertheless, at the protein level, current studies suggest that a tubular segment-specific balance between mTORC1 and mTORC2 exists. In the proximal tubule, mTORC1 regulates nutrients transports through various transporters located in this segment. On the other hand, in the thick ascending limb of the loop of Henle, both complexes play a role in regulating NKCC2 expression and activity. Lastly, in the principal cells of the collecting duct, mTORC2 determines Na
    MeSH term(s) Humans ; Acute Kidney Injury/metabolism ; Kidney/metabolism ; Mechanistic Target of Rapamycin Complex 1/metabolism ; Mechanistic Target of Rapamycin Complex 2/metabolism ; Signal Transduction/physiology ; Sirolimus/metabolism ; Sirolimus/pharmacology ; TOR Serine-Threonine Kinases/metabolism ; Biological Transport
    Chemical Substances Mechanistic Target of Rapamycin Complex 1 (EC 2.7.11.1) ; Mechanistic Target of Rapamycin Complex 2 (EC 2.7.11.1) ; MTOR protein, human (EC 2.7.1.1) ; Sirolimus (W36ZG6FT64) ; TOR Serine-Threonine Kinases (EC 2.7.11.1)
    Language English
    Publishing date 2023-04-13
    Publishing country England
    Document type Journal Article ; Review ; Research Support, Non-U.S. Gov't
    ZDB-ID 2218636-0
    ISSN 1748-1716 ; 1748-1708
    ISSN (online) 1748-1716
    ISSN 1748-1708
    DOI 10.1111/apha.13960
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Mitochondrial Dysfunction in Kidney Tubulopathies.

    Hoogstraten, Charlotte A / Hoenderop, Joost G / de Baaij, Jeroen H F

    Annual review of physiology

    2023  Volume 86, Page(s) 379–403

    Abstract: Mitochondria play a key role in kidney physiology and pathology. They produce ATP to fuel energy-demanding water and solute reabsorption processes along the nephron. Moreover, mitochondria contribute to cellular health by the regulation of autophagy, ( ... ...

    Abstract Mitochondria play a key role in kidney physiology and pathology. They produce ATP to fuel energy-demanding water and solute reabsorption processes along the nephron. Moreover, mitochondria contribute to cellular health by the regulation of autophagy, (oxidative) stress responses, and apoptosis. Mitochondrial abundance is particularly high in cortical segments, including proximal and distal convoluted tubules. Dysfunction of the mitochondria has been described for tubulopathies such as Fanconi, Gitelman, and Bartter-like syndromes and renal tubular acidosis. In addition, mitochondrial cytopathies often affect renal (tubular) tissues, such as in Kearns-Sayre and Leigh syndromes. Nevertheless, the mechanisms by which mitochondrial dysfunction results in renal tubular diseases are only scarcely being explored. This review provides an overview of mitochondrial dysfunction in the development and progression of kidney tubulopathies. Furthermore, it emphasizes the need for further mechanistic investigations to identify links between mitochondrial function and renal electrolyte reabsorption.
    MeSH term(s) Humans ; Kidney Tubules/metabolism ; Kidney Tubules/pathology ; Bartter Syndrome/metabolism ; Bartter Syndrome/pathology ; Kearns-Sayre Syndrome/metabolism ; Kearns-Sayre Syndrome/pathology ; Kidney Diseases/pathology ; Mitochondria
    Language English
    Publishing date 2023-11-27
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 207933-1
    ISSN 1545-1585 ; 0066-4278
    ISSN (online) 1545-1585
    ISSN 0066-4278
    DOI 10.1146/annurev-physiol-042222-025000
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Chloride-sensitive signaling turns the potassium switch on.

    Hoorn, Ewout J / de Baaij, Jeroen H F

    Kidney international

    2022  Volume 102, Issue 5, Page(s) 956–958

    Abstract: The potassium switch refers to plasma potassium regulation of the sodium-chloride cotransporter (NCC), which controls distal sodium delivery and therefore potassium secretion. Low extracellular potassium activates NCC by relieving chloride inhibition of ... ...

    Abstract The potassium switch refers to plasma potassium regulation of the sodium-chloride cotransporter (NCC), which controls distal sodium delivery and therefore potassium secretion. Low extracellular potassium activates NCC by relieving chloride inhibition of With-No-Lysine 4 (WNK4). A new mouse model carrying a chloride-insensitive WNK4 mutant still shows NCC activation on low potassium diet. These effects are mediated by WNK4 activation and kelch-like 3 (KLHL3) inhibition and reveal additional chloride-sensitive pathways for NCC activation.
    MeSH term(s) Mice ; Animals ; Potassium/metabolism ; Chlorides/metabolism ; Protein Serine-Threonine Kinases/genetics ; Sodium Chloride Symporters/metabolism ; Sodium/metabolism ; Solute Carrier Family 12, Member 3/metabolism
    Chemical Substances Potassium (RWP5GA015D) ; Chlorides ; Protein Serine-Threonine Kinases (EC 2.7.11.1) ; Sodium Chloride Symporters ; Sodium (9NEZ333N27) ; Solute Carrier Family 12, Member 3
    Language English
    Publishing date 2022-10-22
    Publishing country United States
    Document type Journal Article
    ZDB-ID 120573-0
    ISSN 1523-1755 ; 0085-2538
    ISSN (online) 1523-1755
    ISSN 0085-2538
    DOI 10.1016/j.kint.2022.08.023
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: The genetic spectrum of Gitelman(-like) syndromes.

    Schlingmann, Karl P / de Baaij, Jeroen H F

    Current opinion in nephrology and hypertension

    2022  Volume 31, Issue 5, Page(s) 508–515

    Abstract: Purpose of review: Gitelman syndrome is a recessive salt-wasting disorder characterized by hypomagnesemia, hypokalemia, metabolic alkalosis and hypocalciuria. The majority of patients are explained by mutations and deletions in the SLC12A3 gene, ... ...

    Abstract Purpose of review: Gitelman syndrome is a recessive salt-wasting disorder characterized by hypomagnesemia, hypokalemia, metabolic alkalosis and hypocalciuria. The majority of patients are explained by mutations and deletions in the SLC12A3 gene, encoding the Na+-Cl--co-transporter (NCC). Recently, additional genetic causes of Gitelman-like syndromes have been identified that should be considered in genetic screening. This review aims to provide a comprehensive overview of the clinical, genetic and mechanistic aspects of Gitelman(-like) syndromes.
    Recent findings: Disturbed Na+ reabsorption in the distal convoluted tubule (DCT) is associated with hypomagnesemia and hypokalemic alkalosis. In Gitelman syndrome, loss-of-function mutations in SLC12A3 cause impaired NCC-mediated Na+ reabsorption. In addition, patients with mutations in CLCKNB, KCNJ10, FXYD2 or HNF1B may present with a similar phenotype, as these mutations indirectly reduce NCC activity. Furthermore, genetic investigations of patients with Na+-wasting tubulopathy have resulted in the identification of pathogenic variants in MT-TI, MT-TF, KCNJ16 and ATP1A1. These novel findings highlight the importance of cell metabolism and basolateral membrane potential for Na+ reabsorption in the DCT.
    Summary: Altogether, these findings extend the genetic spectrum of Gitelman-like electrolyte alterations. Genetic testing of patients with hypomagnesemia and hypokalemia should cover a panel of genes involved in Gitelman-like syndromes, including the mitochondrial genome.
    MeSH term(s) Alkalosis/complications ; Alkalosis/genetics ; Bartter Syndrome/genetics ; Gitelman Syndrome/complications ; Gitelman Syndrome/genetics ; Humans ; Hypokalemia/genetics ; Magnesium/metabolism ; Sodium/metabolism ; Solute Carrier Family 12, Member 3/genetics
    Chemical Substances SLC12A3 protein, human ; Solute Carrier Family 12, Member 3 ; Sodium (9NEZ333N27) ; Magnesium (I38ZP9992A)
    Language English
    Publishing date 2022-07-11
    Publishing country England
    Document type Journal Article ; Review ; Research Support, Non-U.S. Gov't
    ZDB-ID 1151092-4
    ISSN 1473-6543 ; 1535-3842 ; 1062-4813 ; 1062-4821
    ISSN (online) 1473-6543 ; 1535-3842
    ISSN 1062-4813 ; 1062-4821
    DOI 10.1097/MNH.0000000000000818
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Hypomagnesemia and Cardiovascular Risk in Type 2 Diabetes.

    Oost, Lynette J / Tack, Cees J / de Baaij, Jeroen H F

    Endocrine reviews

    2022  Volume 44, Issue 3, Page(s) 357–378

    Abstract: Hypomagnesemia is 10-fold more common in individuals with type 2 diabetes (T2D) than in the healthy population. Factors that are involved in this high prevalence are low Mg2+ intake, gut microbiome composition, medication use, and presumably genetics. ... ...

    Abstract Hypomagnesemia is 10-fold more common in individuals with type 2 diabetes (T2D) than in the healthy population. Factors that are involved in this high prevalence are low Mg2+ intake, gut microbiome composition, medication use, and presumably genetics. Hypomagnesemia is associated with insulin resistance, which subsequently increases the risk to develop T2D or deteriorates glycemic control in existing diabetes. Mg2+ supplementation decreases T2D-associated features like dyslipidemia and inflammation, which are important risk factors for cardiovascular disease (CVD). Epidemiological studies have shown an inverse association between serum Mg2+ and the risk of developing heart failure (HF), atrial fibrillation (AF), and microvascular disease in T2D. The potential protective effect of Mg2+ on HF and AF may be explained by reduced oxidative stress, fibrosis, and electrical remodeling in the heart. In microvascular disease, Mg2+ reduces the detrimental effects of hyperglycemia and improves endothelial dysfunction; however, clinical studies assessing the effect of long-term Mg2+ supplementation on CVD incidents are lacking, and gaps remain on how Mg2+ may reduce CVD risk in T2D. Despite the high prevalence of hypomagnesemia in people with T2D, routine screening of Mg2+ deficiency to provide Mg2+ supplementation when needed is not implemented in clinical care as sufficient clinical evidence is lacking. In conclusion, hypomagnesemia is common in people with T2D and is involved both as cause, probably through molecular mechanisms leading to insulin resistance, and as consequence and is prospectively associated with development of HF, AF, and microvascular complications. Whether long-term supplementation of Mg2+ is beneficial, however, remains to be determined.
    MeSH term(s) Humans ; Diabetes Mellitus, Type 2/complications ; Diabetes Mellitus, Type 2/drug therapy ; Risk Factors ; Cardiovascular Diseases/etiology ; Cardiovascular Diseases/complications ; Magnesium/therapeutic use ; Insulin Resistance ; Heart Disease Risk Factors
    Chemical Substances Magnesium (I38ZP9992A)
    Language English
    Publishing date 2022-11-08
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 603096-8
    ISSN 1945-7189 ; 0163-769X
    ISSN (online) 1945-7189
    ISSN 0163-769X
    DOI 10.1210/endrev/bnac028
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  7. Article ; Online: Mechanisms of ion transport regulation by HNF1β in the kidney: beyond transcriptional regulation of channels and transporters.

    Tholen, Lotte E / Hoenderop, Joost G J / de Baaij, Jeroen H F

    Pflugers Archiv : European journal of physiology

    2022  Volume 474, Issue 8, Page(s) 901–916

    Abstract: Hepatocyte nuclear factor 1β (HNF1β) is a transcription factor essential for the development and function of the kidney. Mutations in and deletions of HNF1β cause autosomal dominant tubule interstitial kidney disease (ADTKD) subtype HNF1β, which is ... ...

    Abstract Hepatocyte nuclear factor 1β (HNF1β) is a transcription factor essential for the development and function of the kidney. Mutations in and deletions of HNF1β cause autosomal dominant tubule interstitial kidney disease (ADTKD) subtype HNF1β, which is characterized by renal cysts, diabetes, genital tract malformations, and neurodevelopmental disorders. Electrolyte disturbances including hypomagnesemia, hyperuricemia, and hypocalciuria are common in patients with ADTKD-HNF1β. Traditionally, these electrolyte disturbances have been attributed to HNF1β-mediated transcriptional regulation of gene networks involved in ion transport in the distal part of the nephron including FXYD2, CASR, KCNJ16, and FXR. In this review, we propose additional mechanisms that may contribute to the electrolyte disturbances observed in ADTKD-HNF1β patients. Firstly, kidney development is severely affected in Hnf1b-deficient mice. HNF1β is required for nephron segmentation, and the absence of the transcription factor results in rudimentary nephrons lacking mature proximal tubule, loop of Henle, and distal convoluted tubule cluster. In addition, HNF1β is proposed to be important for apical-basolateral polarity and tight junction integrity in the kidney. Interestingly, cilia formation is unaffected by Hnf1b defects in several models, despite the HNF1β-mediated transcriptional regulation of many ciliary genes. To what extent impaired nephron segmentation, apical-basolateral polarity, and cilia function contribute to electrolyte disturbances in HNF1β patients remains elusive. Systematic phenotyping of Hnf1b mouse models and the development of patient-specific kidney organoid models will be essential to advance future HNF1β research.
    MeSH term(s) Animals ; Electrolytes ; Hepatocyte Nuclear Factor 1-beta/metabolism ; Ion Transport ; Kidney/metabolism ; Membrane Transport Proteins ; Mice ; Nephrons/metabolism ; Transcription Factors/metabolism
    Chemical Substances Electrolytes ; Hnf1b protein, mouse ; Membrane Transport Proteins ; Transcription Factors ; Hepatocyte Nuclear Factor 1-beta (138674-15-4)
    Language English
    Publishing date 2022-05-13
    Publishing country Germany
    Document type Journal Article ; Review ; Research Support, Non-U.S. Gov't
    ZDB-ID 6380-0
    ISSN 1432-2013 ; 0031-6768
    ISSN (online) 1432-2013
    ISSN 0031-6768
    DOI 10.1007/s00424-022-02697-5
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  8. Article ; Online: Correction to: Mechanisms of ion transport regulation by HNF1β in the kidney: beyond transcriptional regulation of channels and transporters.

    Tholen, Lotte E / Hoenderop, Joost G J / de Baaij, Jeroen H F

    Pflugers Archiv : European journal of physiology

    2022  Volume 474, Issue 8, Page(s) 917

    Language English
    Publishing date 2022-05-20
    Publishing country Germany
    Document type Published Erratum
    ZDB-ID 6380-0
    ISSN 1432-2013 ; 0031-6768
    ISSN (online) 1432-2013
    ISSN 0031-6768
    DOI 10.1007/s00424-022-02706-7
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Mechanisms of proton pump inhibitor-induced hypomagnesemia.

    Gommers, Lisanne M M / Hoenderop, Joost G J / de Baaij, Jeroen H F

    Acta physiologica (Oxford, England)

    2022  Volume 235, Issue 4, Page(s) e13846

    Abstract: Proton pump inhibitors (PPIs) reliably suppress gastric acid secretion and are therefore the first-line treatment for gastric acid-related disorders. Hypomagnesemia (serum magnesium [ ... ...

    Abstract Proton pump inhibitors (PPIs) reliably suppress gastric acid secretion and are therefore the first-line treatment for gastric acid-related disorders. Hypomagnesemia (serum magnesium [Mg
    MeSH term(s) Colon/metabolism ; Gastrointestinal Microbiome ; Homeostasis ; Magnesium/metabolism ; Magnesium/pharmacology ; Proton Pump Inhibitors/adverse effects
    Chemical Substances Proton Pump Inhibitors ; Magnesium (I38ZP9992A)
    Language English
    Publishing date 2022-06-14
    Publishing country England
    Document type Journal Article ; Review ; Research Support, Non-U.S. Gov't
    ZDB-ID 2218636-0
    ISSN 1748-1716 ; 1748-1708
    ISSN (online) 1748-1716
    ISSN 1748-1708
    DOI 10.1111/apha.13846
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  10. Article ; Online: Liver and spleen predominantly mediate calciprotein particle clearance in a rat model of chronic kidney disease.

    Zeper, Lara W / Bos, Caro / Leermakers, Pieter A / Franssen, Gerben M / Raavé, René / Hoenderop, Joost G J / de Baaij, Jeroen H F

    American journal of physiology. Renal physiology

    2024  Volume 326, Issue 4, Page(s) F622–F634

    Abstract: Calciprotein particles (CPPs) provide an efficient mineral buffering system to prevent the complexation of phosphate and calcium in the circulation. However, in chronic kidney disease (CKD), the phosphate load exceeds the mineral buffering capacity, ... ...

    Abstract Calciprotein particles (CPPs) provide an efficient mineral buffering system to prevent the complexation of phosphate and calcium in the circulation. However, in chronic kidney disease (CKD), the phosphate load exceeds the mineral buffering capacity, resulting in the formation of crystalline CPP2 particles. CPP2 have been associated with cardiovascular events and mortality. Moreover, CPP2 have been demonstrated to induce calcification in vitro. In this study, we examined the fate of CPP2 in a rat model of CKD. Calcification was induced in Sprague-Dawley rats by 5/6 nephrectomy (5/6-Nx) combined with a high-phosphate diet. Control rats received sham surgery and high-phosphate diet. Twelve weeks after surgery, kidney failure was significantly induced in 5/6-Nx rats as determined by enhanced creatinine and urea plasma levels and abnormal kidney histological architecture. Subsequently, radioactive and fluorescent (FITC)-labeled CPP2 ([
    MeSH term(s) Rats ; Animals ; Spleen/metabolism ; Calcium/metabolism ; Fluorescein-5-isothiocyanate ; Tissue Distribution ; Rats, Sprague-Dawley ; Vascular Calcification/diagnostic imaging ; Vascular Calcification/etiology ; Minerals ; Liver/metabolism ; Phosphates ; Renal Insufficiency, Chronic/pathology
    Chemical Substances Calcium (SY7Q814VUP) ; Fluorescein-5-isothiocyanate (I223NX31W9) ; Minerals ; Phosphates
    Language English
    Publishing date 2024-02-29
    Publishing country United States
    Document type Journal Article
    ZDB-ID 603837-2
    ISSN 1522-1466 ; 0363-6127
    ISSN (online) 1522-1466
    ISSN 0363-6127
    DOI 10.1152/ajprenal.00239.2023
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