Isolated sedoheptulokinase deficiency: a narrative review of metabolic bases, diagnostic biomarkers, and phenotypic uncertainties

https://doi.org/10.5281/zenodo.19671761

Authors

  • Maria Eduarda de Lima Dacier Lobato Centro Universitário Metropolitano da Amazônia (UNIFAMAZ)

Keywords:

sedoheptulokinase, SHPK, pentose phosphate pathway, erythritol, sedoheptulose, metabolic genetics

Abstract

Isolated sedoheptulokinase deficiency is a rare metabolic alteration characterized mainly by increased urinary sedoheptulose and erythritol. Although the biochemical defect is coherent and reproducible, its clinical significance remains uncertain. This narrative review critically synthesizes the metabolic basis of SHPK deficiency, its diagnostic biomarkers, and the consistency of the available phenotypic evidence. Current literature shows reproducible enzymatic and biochemical abnormalities, including in cystinosis patients carrying the common 57-kb deletion involving SHPK. However, the extremely limited number of isolated human cases, the lack of phenotypic overlap, and the absence of a relevant phenotype in animal models weaken the hypothesis of a clinically defined monogenic disorder. At present, isolated SHPK deficiency is best interpreted as a biochemical phenotype with unproven clinical pathogenicity

References

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Published

2026-04-21

How to Cite

Lobato, M. E. de L. D. (2026). Isolated sedoheptulokinase deficiency: a narrative review of metabolic bases, diagnostic biomarkers, and phenotypic uncertainties: https://doi.org/10.5281/zenodo.19671761. Journal of Convergent Scientific Inquiry, 2(4), 14–18. Retrieved from https://jcsi.ufrdj.com/index.php/jcsi/article/view/23

Issue

Section

Revisão Narrativa ou Integrativa

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