Increased insulin-like growth factor-1 levels in cerebrospinal fluid of advanced subacute sclerosing panencephalitis patients.
Eur J Paediatr Neurol 2016;
20:611-5. [PMID:
27061773 DOI:
10.1016/j.ejpn.2016.03.007]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2015] [Revised: 02/19/2016] [Accepted: 03/14/2016] [Indexed: 12/26/2022]
Abstract
PURPOSE
Subacute sclerosing panencephalitis (SSPE) is a progressive, lethal disease. Brain histopathology in certain SSPE patients shows, neurofibrillary tangles composed of abnormally phosphorylated, microtubule-associated protein tau (PHF-tau). Because the, phosphorylation of tau is inhibited by insulin and insulin-like growth factor-1 (IGF-1), we investigated cerebrospinal fluid (CSF) insulin and IGF-1 levels in SSPE patients.
METHODS AND RESULTS
In this study CSF IGF-1 and insulin levels of 45 SSPE and 25 age-matched control patients were investigated. CSF IGF-1 levels were significantly higher in SSPE patients at stage 4, compared to other stages (p 0.05). CSF insulin and IGF-1 levels were both positively correlated with serum measles IgG.
CONCLUSIONS
The correlation between CSF insulin and IGF-1 levels and serum measles virus IgG titer may be the result of, insulin activating IGF-1 receptors, and consequently, IGF-1 stimulating, plasma cells and enhancing IgG production. Increased IGF-1 may also, inhibit the phosphorylation of tau. Further studies examining the, correlation between IGF-1, insulin, tau, and PHF-tau levels in the same, patients may clarify any possible pathogenetic relation between these, pathways.
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