Evidence mapPaperPMID 42213199Full record

ArticleMolecular biology reports2026

Differential expression of PPAR isoforms in streptozotocin induced model of sporadic alzheimer's disease in zebrafish.

Neha Dhiman, Kriti Patial, Rajat Sandhir

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Article in Molecular biology reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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3 authors.

Neha DhimanDepartment of Biochemistry, Hargobind Khorana Block, Panjab University, Sector 25, Chandigarh, 160014, India.
Kriti PatialDepartment of Biochemistry, Hargobind Khorana Block, Panjab University, Sector 25, Chandigarh, 160014, India.
Rajat SandhirDepartment of Biochemistry, Hargobind Khorana Block, Panjab University, Sector 25, Chandigarh, 160014, India. sandhir@pu.ac.in.

Funding

Anusandhan National Research Foundation CRG/2022/008902Department of Science and Technology DST/INSPIRE Fellowship/2019/IF190499
6 · The paper itself

Abstract

backgroundSporadic Alzheimer's Disease (sAD) is a multifactorial neurodegenerative disorder in which metabolic dysfunctions and central insulin resistance are recognized as key pathogenic drivers accompanied by amyloid and tau pathology. Effective disease-modifying therapies remain elusive, representing a major global public health concern. Peroxisome proliferator-activated receptors (PPARs) have emerged as promising therapeutic targets due to their roles in regulating neuroinflammation, lipid metabolism and insulin sensitivity. Despite extensive studies highlighting the distinct role of PPAR isoforms in neurodegeneration, their involvement in sAD pathology remains unexplored.

methodsThe role of PPARs was evaluated in streptozotocin (STZ) model of sAD. STZ was administered intracerebroventricularly at a dose of 5 mg/kg for 7 days. The cognitive functions and expression of PPAR isoforms and its downstream targets were investigated in adult zebrafish.

resultsSTZ-treated zebrafish exhibited significant cognitive impairment with decreased preference for the novel object indicating working memory deficits. Molecular analysis revealed isoform-specific modulation of PPARs. PPARα was upregulated, whereas its downstream targets (acox1, cpt1, map3k8) were downregulated suggesting impaired transcriptional activation. PPARγ, PPARβ/δ and their targets were significantly downregulated at both transcript and protein levels suggesting suppression of their neuroprotective functions. Immunofluorescence revealed distinct spatial localization patterns; PPARα was prominent in telencephalon and optic tectum; PPARγ showed punctate nuclear expression in preoptic area; and PPARβ/δ displayed diffuse nuclear staining in diencephalon.

conclusionsThese findings demonstrate that STZ-induced cognitive deficits are accompanied by region-specific dysregulation in expression of PPAR isoforms suggesting that PPAR modulation may be a therapeutic strategy to prevent sAD pathogenesis.

Indexed as

Alzheimer DiseasePeroxisome Proliferator-Activated ReceptorsAnimalsBrainDisease Models, AnimalGene Expression RegulationPPAR gammaProtein IsoformsStreptozocinZebrafishPeroxisome Proliferator-Activated ReceptorsPPAR gammaProtein IsoformsStreptozocinAlzheimer’s diseaseBehaviourDementiaNuclear receptorsPPARsStreptozotocinZebrafish

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.