What molecular mechanism links SPTLC1 mutations to mitochondrial calcium depletion in HSN1A?

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The abstract shows that V144D mutation causes intramitochondrial Ca2+ depletion and cytoplasmic Ca2+ increase, but the mechanistic connection between sphingolipid synthesis defects and mitochondrial calcium handling remains unexplained. Understanding this link is crucial for developing targeted therapies for HSN1A. Gap type: unexplained_observation Source paper: Calcium-Mediated Calpain Activation and Microtubule Dissociation in Cell Model of Hereditary Sensory Neuropathy Type-1 Expressing V144D (2022, DNA and cell biology, PMID:34986032)

Priority: 0.80 Domain: neurodegeneration Hypotheses: 0

📊 Landscape Analysis

Landscape Summary: What molecular mechanism links SPTLC1 mutations to mitochondrial calcium depletion in HSN1A? is a 0.8 priority gap in neurodegeneration. It has 0 linked hypotheses with average composite score 0.000. Status: open.

Key Unanswered Questions

What is the optimal TREM2 modulation strategy across disease stages?
How does DAM activation state affect therapeutic outcomes?
What biomarkers predict response to TREM2-targeted interventions?

Key Researchers

Colonna, Sevlever, et al. (TREM2 biology)

Clinical Trials

What molecular mechanism links SPTLC1 mutations to mitochondrial calcium depletion in HSN1A? — INVOKE-2 (completed)

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Hypotheses

0.000

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0.000

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0

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0.00

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Mechanistic Families

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🌊 Knowledge Graph Connections

activates (6)

SPTLC1→ObesitySPTLC1→FibrosisSPTLC1→Amyotrophic Lateral SclerosisSPTLC1→AtherosclerosisSPTLC1→Pyramidal

▸ Show 1 more

SPTLC1→Mast Cell

associated with (12)

SPTLC1→Juvenile Amyotrophic Lateral SclerosisSPTLC1→Amyotrophic Lateral SclerosisSPTLC1→NeuropathySPTLC1→NeurodegenerationSPTLC1→Als

▸ Show 7 more

SPTLC1→CERS2SPTLC1→NGFRSPTLC1→RAB7CCT5→SPTLC1SPTLC1→oligodendrocytesNGFR→SPTLC1RAB7→SPTLC1

biomarker for (1)

SPTLC1→De Novo Variants

causes (2)

SPTLC1→Early-Onset Motor Neuron DiseaseSPTLC1→Neuropathy

expressed in (9)

SPTLC1→macrophagesSPTLC1→oligodendrocytesSPTLC1→AlsSPTLC1→ALSSPTLC1→Cardiovascular

▸ Show 4 more

SPTLC1→SPTLC2SPTLC1→obesitySPTLC1→STRAPSPTLC1→Rb

inhibits (2)

SPTLC1→obesitySPTLC1→ABCA1

interacts with (4)

SPTLC1→CardiovascularSPTLC1→Amyotrophic Lateral SclerosisSPTLC1→AlsSPTLC1→ORMDL proteins

involved in (2)

SPTLC1→1-DeoxysphingolipidsSPTLC1→Sphingolipid biosynthesis

participates in (3)

SPTLC1→lipid metabolismSPTLC1→oxidative stress responseSPTLC1→sphingolipid metabolism

regulates (6)

ALS→SPTLC1SPTLC1→ALSSPTLC1→monocytesSPTLC1→Sphingolipid metabolismSPTLC1→SPTLC2

▸ Show 1 more

SPTLC2→SPTLC1

targets (1)

h-58e655ee→SPTLC1

therapeutic target (1)

transported by (1)

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