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Autosomal recessive proximal renal tubular acidosis (AR pRTA) is a rare form of proximal renal tubular acidosis (pRTA) characterized by an isolated defect in the proximal tubule leading to the decreased reabsorption of bicarbonate and consequentially to urinary bicarbonate wastage along with additional characteristic clinical features.
Features include always present findings: Hyperamylasemia, Band keratopathy, Short stature, and Cataract and others. 16 total HPO annotations.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Kidneys and urinary system | 3 | Impaired renal tubular reabsorption of bicarbonate, Proximal renal tubular acidosis, Bicarbonate-wasting renal tubular acidosis |
Growth and development | 2 | Short stature, Growth delay |
Eyes | 2 | Cataract, Glaucoma |
Brain and nerves | 2 | Cerebral calcification, Intellectual disability |
Muscles | 1 | Bicarbonate-wasting renal tubular acidosis |
Metabolism | 1 | Metabolic acidosis |
SLC4A4 function has not been fully characterized.
Autosomal recessive proximal renal tubular acidosis is associated with mutations in the SLC4A4 gene on chromosome 4.
Genetic testing for SLC4A4 is available. Testing is considered confirmatory for diagnosis.
Phenotype severity distribution: 14 always present features.
Estimated prevalence: Unknown (Unknown prevalence).
1 clinical trial registered, 1 recruiting. Interventions under study include other interventions. Research is primarily sponsored by academic and government institutions.
22 publications have been identified in PubMed for autosomal recessive proximal renal tubular acidosis. Research spans Case Report / Case Series (52%), Review / Meta-Analysis (19%), and Basic Science / Preclinical (14%).
Research Type | Count | % of Total |
|---|---|---|
Patient case studies | 11 | 52% |
Research summaries | 4 | 19% |
Laboratory research | 3 | 14% |
Disease patterns and progression | 3 | 14% |
Bot Rachisan AL (2026). [PMID: 41897147](https://pubmed.ncbi.nlm.nih.gov/41897147/). *Children (Basel)*. [Review / Meta-Analysis]
Charfi H (2025). [PMID: 40935900](https://pubmed.ncbi.nlm.nih.gov/40935900/). *European journal of pediatrics*. [Epidemiology / Natural History]
Essid M (2025). [PMID: 39993789](https://pubmed.ncbi.nlm.nih.gov/39993789/). *Clinical genetics*. [Basic Science / Preclinical]
Chang C (2025). [PMID: 41395315](https://pubmed.ncbi.nlm.nih.gov/41395315/). *Frontiers in pediatrics*. [Case Report / Case Series]
Alrasheed A (2025). [PMID: 41503293](https://pubmed.ncbi.nlm.nih.gov/41503293/). *Cureus*. [Epidemiology / Natural History]
Aguiar GRF (2025). [PMID: 39956877](https://pubmed.ncbi.nlm.nih.gov/39956877/). *International urology and nephrology*. [Case Report / Case Series]
Vo VH (2025). [PMID: 40880677](https://pubmed.ncbi.nlm.nih.gov/40880677/). *Case reports in gastroenterology*. [Case Report / Case Series]
Choudhary DS (2025). [PMID: 40421228](https://pubmed.ncbi.nlm.nih.gov/40421228/). *Medicine international*. [Case Report / Case Series]
AlFaris B (2025). [PMID: 39667299](https://pubmed.ncbi.nlm.nih.gov/39667299/). *Brain & development*. [Basic Science / Preclinical]
Han M (2025). [PMID: 40629618](https://pubmed.ncbi.nlm.nih.gov/40629618/). *Medicine*. [Epidemiology / Natural History]
Data assembled from 7 of 12 sources · Last updated Sep 20, 2026, 9:35 PM UTC
Online Mendelian Inheritance in Man
European rare disease database
Genetic and Rare Diseases Info Center