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Specific activation of B-cell clones within the central nervous system in course of herpes simplex encephalitis

M Ceroni1, C Camana, D M Franciotta

  • 1IRCCS Fondazione C. Mondino Università di Pavia, Sezione di Pavia.

Bollettino Della Societa Italiana Di Biologia Sperimentale
|December 1, 1990
PubMed

Insights

Immunoglobulin G oligoclonal bands in herpes simplex virus type 1 encephalitis patients were analyzed in serum and cerebrospinal fluid (CSF). Virus-specific bands appeared transiently in CSF and serum, indicating B-cell activation in both compartments.

Area of Science:

  • Neurology
  • Immunology
  • Virology

Background:

  • Herpes simplex virus type 1 (HSV-1) encephalitis is a severe neurological condition.
  • Understanding B-cell activation in the central nervous system (CNS) and peripheral blood is crucial for managing HSV-1 encephalitis.
  • Immunoglobulin G (IgG) oligoclonal bands can indicate localized immune responses within the CNS.

Purpose of the Study:

  • To investigate the presence and dynamics of total and HSV-1-specific IgG oligoclonal bands in paired serum and CSF samples from patients with HSV-1 encephalitis.
  • To explore the relationship between oligoclonal band patterns in serum and CSF during the course of the disease.

Main Methods:

  • Paired serum and cerebrospinal fluid (CSF) samples were collected from four patients diagnosed with HSV-1 encephalitis.
  • Isoelectric focusing in agarose gel was employed for sensitive protein separation.
  • Passive transfer of proteins onto nitrocellulose paper followed by specific immunostaining was used to detect IgG oligoclonal bands.

Main Results:

  • Oligoclonal bands were detected in both serum and CSF of all four patients studied.
  • HSV-1-specific IgG oligoclonal bands were found in the CSF during a limited phase of the disease.
  • These virus-specific bands in CSF had corresponding bands in the serum during other periods of the illness.

Conclusions:

  • The presence of oligoclonal bands in both serum and CSF suggests a systemic and localized immune response in HSV-1 encephalitis.
  • The transient nature of HSV-1-specific IgG bands in CSF indicates dynamic B-cell activation within the CNS.
  • Findings highlight the importance of analyzing both serum and CSF for a comprehensive understanding of immune responses in HSV-1 encephalitis.

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