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Related Experiment Video

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Preparation of Hard Palm Seeds for Matrix-Assisted Laser Desorption/Ionization-Imaging Mass Spectrometry Analysis

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[Carasil].

Toshio Fukutake¹

¹Department of Neurology, Kameda Medical Center, Chiba, Japan.

Brain and Nerve = Shinkei Kenkyu No Shinpo

|February 9, 2011

Summary

Cerebral autosomal recessive arteriopathy with subcortical infarcts and leukoencephalopathy (CARASIL) is a genetic small vessel disease caused by HTRA1 mutations. Mutant HTRA1 impairs TGF-β signaling, leading to arteriopathy and distinct clinical symptoms.

Area of Science:

Genetics
Neurology
Vascular Biology

Background:

Cerebral autosomal recessive arteriopathy with subcortical infarcts and leukoencephalopathy (CARASIL) is a rare, single-gene disorder affecting cerebral small blood vessels.
It is caused by mutations in the HTRA1 gene, distinct from CADASIL, another genetic small vessel disease.

Observation:

CARASIL presents with ischemic stroke, dementia, premature baldness, and low back pain.
Brain MRI shows white-matter changes and lacunar infarctions.
Histopathology reveals arteriosclerosis in small penetrating arteries without GOM or amyloid deposition.

Findings:

Mutations in HTRA1 lead to decreased protease activity.
This dysfunction results in failed repression of transforming growth factor-β (TGF-β) family signaling.

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Increased TGF-β signaling is identified as the cause of arteriopathy in CARASIL.

Implications:

HTRA1 is a key gene in understanding cerebral small vessel diseases.
Further research into HTRA1 and TGF-β signaling may reveal therapeutic strategies.
CARASIL provides insights into the mechanisms of arteriopathy, alopecia, and degenerative disk diseases.