Abstract
Introduction: Transaldolase deficiency (TALDO; OMIM 606003) is a rare inborn autosomal recessive error of the pentose phosphate pathway that, to date, has been diagnosed in 33 patients. Tżhere are few reports regarding the long-term follow-up of these patients.
The aim of our study is to present the disease progression in the form of a systematic long-term follow-up of four Polish patients with TALDO.
Methods and Results: We report four patients who manifested early onset TALDO. They were monitored with systematic clinical and laboratory examinations for 4–13 years. The dominant feature was an early liver injury, with subsequent renal tubulopathy. All patients presented with osteopenia and poor physical development. Our data shows that polyol concentrations seem to decrease with age.
Conclusions: In our patients, a progressive coagulopathy was the most sensitive parameter of liver dysfunction. Nodular fibrosis of the liver developed over the natural course of TALDO. This is the first report of long-term systematic clinical and biochemical monitoring of the disease progress in patients with TALDO.
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In silico prediction of the potential protein functionality of identified molecular variants was performed with: PolyPhen-2 – Polymorphism Phenotyping v2 (http://genetics.bwh.harvard.edu/pph2/index.shtml); MutationAssessor (http://mutationassessor.org); LRT – Likelihood Ratio Test (http://www.genetics.wustl.edu/jflab/lrt_query.html); SIFT – Sorting Intolerant From Tolerant (http://sift.jcvi.org/www/SIFT_BLink_submit.html); MutationTaster (http://www.mutationtaster.org/); Alamut Visual (http://www.interactive-biosoftware.com/alamut-visual/); FATHMM – Functional Analysis through Hidden Markov Models FATHMM (https://omictools.com/functional-analysis-through-hidden-markov-models-tool); MetaSVM – MetaSVM score for non-synonymous variants; MetaLR – MetaLR score for non-synonymous variants.
Abbreviations
- AFP:
-
Alpha-fetoprotein
- ALT:
-
Alanine transaminase
- APTT:
-
Activated partial thromboplastin time
- AST:
-
Aspartate transaminase
- CT:
-
Computed tomography
- GFR:
-
Glomerular filtration rate
- GSH:
-
Reduced glutathione
- HCC:
-
Hepatocellular carcinoma
- INR:
-
International normalized ratio
- IUGR:
-
Intrauterine growth retardation
- LTx:
-
Liver transplantation
- NAC:
-
N-acetylcysteine
- NADPH:
-
Nicotinamide adenine dinucleotide phosphate
- PELD:
-
Pediatric end-stage liver disease
- PLT:
-
Platelet count
- PPP:
-
Pentose phosphate pathway
- PT:
-
Prothrombin time
- TALDO:
-
Transaldolase deficiency
- TALDO1 :
-
Transaldolase gene name
- US:
-
Ultrasound
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Acknowledgements
We thank Colleen Elso, PhD, from Edanz Group (www.edanzediting.com/ac) for editing a draft of this manuscript.
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Communicated by: Bridget Wilcken
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Lipiński, P. et al. (2018). Long-Term Systematic Monitoring of Four Polish Transaldolase Deficient Patients. In: Morava, E., Baumgartner, M., Patterson, M., Rahman, S., Zschocke, J., Peters, V. (eds) JIMD Reports, Volume 42. JIMD Reports, vol 42. Springer, Berlin, Heidelberg. https://doi.org/10.1007/8904_2017_83
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DOI: https://doi.org/10.1007/8904_2017_83
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