Amino acid and protein metabolism in the human kidney and in patients with chronic kidney disease

2010 ◽  
Vol 29 (4) ◽  
pp. 424-433 ◽  
Author(s):  
Giacomo Garibotto ◽  
Antonella Sofia ◽  
Stefano Saffioti ◽  
Alice Bonanni ◽  
Irene Mannucci ◽  
...  
2020 ◽  
Vol 319 (2) ◽  
pp. F284-F291 ◽  
Author(s):  
Di Feng

Podocyte dysfunction contributes to proteinuric chronic kidney disease. A number of key proteins are essential for podocyte function, including nephrin, podocin, CD2-associated protein (CD2AP), synaptopodin, and α-actinin-4 (ACTN4). Although most of these proteins were first identified through genetic studies associated with human kidney disease, subsequent studies have identified phosphorylation of these proteins as an important posttranslational event that regulates their function. In this review, a brief overview of the function of these key podocyte proteins is provided. Second, the role of phosphorylation in regulating the function of these proteins is described. Third, the association between these phosphorylation pathways and kidney disease is reviewed. Finally, challenges and future directions in studying phosphorylation are discussed. Better characterization of these phosphorylation pathways and others yet to be discovered holds promise for translating this knowledge into new therapies for patients with proteinuric chronic kidney disease.


2009 ◽  
Vol 76 (7) ◽  
pp. 751-759 ◽  
Author(s):  
Xiaonan H. Wang ◽  
Jie Du ◽  
Janet D. Klein ◽  
James L. Bailey ◽  
William E. Mitch

2005 ◽  
Vol 82 (2) ◽  
pp. 342-349 ◽  
Author(s):  
Mohammed E Suliman ◽  
A Rashid Qureshi ◽  
Peter Stenvinkel ◽  
Roberto Pecoits-Filho ◽  
Peter Bárány ◽  
...  

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Christophe Barba ◽  
Bérengère Benoit ◽  
Emilie Bres ◽  
Stéphanie Chanon ◽  
Aurélie Vieille-Marchiset ◽  
...  

AbstractDespite decades of use of low protein diets (LPD) in the management of chronic kidney disease (CKD), their mechanisms of action are unclear. A reduced production of uremic toxins could contribute to the benefits of LPDs. Aromatic amino-acids (AA) are precursors of major uremic toxins such as p-cresyl sulfate (PCS) and indoxyl sulfate (IS). We hypothesize that a low aromatic amino acid diet (LA-AAD, namely a low intake of tyrosine, tryptophan and phenylalanine) while being normoproteic, could be as effective as a LPD, through the decreased production of uremic toxins. Kidney failure was chemically induced in mice with a diet containing 0.25% (w/w) of adenine. Mice received three different diets for six weeks: normoproteic diet (NPD: 14.7% proteins, aromatic AAs 0.019%), LPD (5% proteins, aromatic AAs 0.007%) and LA-AAD (14% proteins, aromatic AAs 0.007%). Both LPD and LA-AAD significantly reduced proteinuria, kidney fibrosis and inflammation. While LPD only slightly decreased plasma free PCS and free IS compared to NPD; free fractions of both compounds were significantly decreased by LA-AAD. These results suggest that a LA-AAD confers similar benefits of a LPD in delaying the progression of CKD through a reduction in some key uremic toxins production (such as PCS and IS), with a lower risk of malnutrition.


2020 ◽  
Vol 472 (4) ◽  
pp. 449-460 ◽  
Author(s):  
Sarah E. Motta ◽  
Pedro Henrique Imenez Silva ◽  
Arezoo Daryadel ◽  
Betül Haykir ◽  
Eva Maria Pastor-Arroyo ◽  
...  

2019 ◽  
Vol 4 (7) ◽  
pp. S90
Author(s):  
M.A. KHAN ◽  
K. Giuliani Giuliani ◽  
X. Wang ◽  
W. Hoy ◽  
H. Healy ◽  
...  

EBioMedicine ◽  
2017 ◽  
Vol 24 ◽  
pp. 267-276 ◽  
Author(s):  
Pazit Beckerman ◽  
Chengxiang Qiu ◽  
Jihwan Park ◽  
Nora Ledo ◽  
Yi-An Ko ◽  
...  

Author(s):  
Esthy Poespitaningtyas ◽  
Roedi Irawan ◽  
Ninik Asmaningsih Soemyarso ◽  
Jusak Nugraha

Chronic kidney disease (CKD) is not uncommon issue in children. CKD is the abnormality of structure or function of the kidney that occurs for more than 3 months. Progresivity of CKD characterized by the presence of longitudinal decline in Glomerulus Filtration Rate (GFR), proteinuria and hypertension. One of the recommendations of the prevention of nutritional supplementation in CKD by administering oral Branched Chain Amino Acid (BCAA). Recently, there has been no research to figure the effects of the of BCAA on children with CKD stage 2-4. Randomized pre-post test controlled trial study was conducted in Nephrology pediatric outpatient clinic Dr. Soetomo hospital with CKD stage 2-4, divided into 2 groups, the BCAA and placebo, followed for 8 weeks to be evaluated for GFR, albumin, proteinuria, blood pressure and nutritional status. Sixteen children with CKD stage 2-4 were enrolled in this study, 71.4% of patients were boys. The mean age was 12.5 (SD 2.90) years. CKD stage 2 about 50% (p=0,767). Nephrotic syndrome was the most common underlying cause of CKD (p=0,149). Moderate malnutrition was about 50% (p=1,000) and short stature was 64.28% (p=1.000). In BCAA group there was decrease of GFR -5.08±7,13 (p=0.055), increase of albumin serum 0.20±0.23 (p=0,062), decrease of delta systole -11,57±15.08 (p=0,565) and diastole -4,85±16.25 (p=0,708), weight loss -0.07±1.01 (p=0.828), an increase of height 0.14±0.24 (p=0,771), and a decrease in BMI -0.03±0.74 (p=0,389). The conclusion in this study is Branched chain amino acid (Leucine, Isoleucine and Valine) supplementation did not provide significant effect in inhibiting progresivity of CKD stage 2-4 in children and improvement of nutritional status.


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