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MANF protein expression is upregulated in immune cells in the ischemic human brain and systemic recombinant MANF delivery in rat ischemic stroke model demonstrates anti-inflammatory effects.
Anttila, Jenni E; Mattila, Olli S; Liew, Hock-Kean; Mätlik, Kert; Mervaala, Eero; Lindholm, Päivi; Lindahl, Maria; Lindsberg, Perttu J; Tseng, Kuan-Yin; Airavaara, Mikko.
Afiliação
  • Anttila JE; Institute of Biotechnology, University of Helsinki, Helsinki, Finland.
  • Mattila OS; Department of Neurology, Helsinki University Hospital and Clinical Neurosciences, University of Helsinki, 00290, Helsinki, Finland.
  • Liew HK; Department of Medical Research, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien County, Hualien, 970, Taiwan.
  • Mätlik K; Institute of Biotechnology, University of Helsinki, Helsinki, Finland.
  • Mervaala E; Department of Pharmacology, Faculty of Medicine, University of Helsinki, Helsinki, Finland.
  • Lindholm P; Institute of Biotechnology, University of Helsinki, Helsinki, Finland.
  • Lindahl M; Institute of Biotechnology, University of Helsinki, Helsinki, Finland.
  • Lindsberg PJ; Department of Neurology, Helsinki University Hospital and Clinical Neurosciences, University of Helsinki, 00290, Helsinki, Finland.
  • Tseng KY; Department of Neurological Surgery, Tri-Service General Hospital and National Defense Medical Center, Taipei, 114, Taiwan. neuronsurgery@gmail.com.
  • Airavaara M; Drug Research Program, Division of Pharmacology and Pharmacotherapy, Faculty of Pharmacy, University of Helsinki, Viikinkaari 5E, P.O. Box 56, 00014, Helsinki, Finland. mikko.airavaara@helsinki.fi.
Acta Neuropathol Commun ; 12(1): 10, 2024 Jan 16.
Article em En | MEDLINE | ID: mdl-38229173
ABSTRACT
Mesencephalic astrocyte-derived neurotrophic factor (MANF) has cytoprotective effects on various injuries, including cerebral ischemia, and it can promote recovery even when delivered intracranially several days after ischemic stroke. In the uninjured rodent brain, MANF protein is expressed almost exclusively in neurons, but post-ischemic MANF expression has not been characterized. We aimed to investigate how endogenous cerebral MANF protein expression evolves in infarcted human brains and rodent ischemic stroke models. During infarct progression, the cerebral MANF expression pattern both in human and rat brains shifted drastically from neurons to expression in inflammatory cells. Intense MANF immunoreactivity took place in phagocytic microglia/macrophages in the ischemic territory, peaking at two weeks post-stroke in human and one-week post-stroke in rat ischemic cortex. Using double immunofluorescence and mice lacking MANF gene and protein from neuronal stem cells, neurons, astrocytes, and oligodendrocytes, we verified that MANF expression was induced in microglia/macrophage cells in the ischemic hemisphere. Embarking on the drastic expression transition towards inflammatory cells and the impact of blood-borne inflammation in stroke, we hypothesized that exogenously delivered MANF protein can modulate tissue recovery processes. In an attempt to enhance recovery, we designed a set of proof-of-concept studies using systemic delivery of recombinant MANF in a rat model of cortical ischemic stroke. Intranasal recombinant MANF treatment decreased infarct volume and reduced the severity of neurological deficits. Intravenous recombinant MANF treatment decreased the levels of pro-inflammatory cytokines and increased the levels of anti-inflammatory cytokine IL-10 in the infarcted cortex one-day post-stroke. In conclusion, MANF protein expression is induced in activated microglia/macrophage cells in infarcted human and rodent brains, and this could implicate MANF's involvement in the regulation of post-stroke inflammation in patients and experimental animals. Moreover, systemic delivery of recombinant MANF shows promising immunomodulatory effects and therapeutic potential in experimental ischemic stroke.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Acidente Vascular Cerebral / AVC Isquêmico Tipo de estudo: Prognostic_studies Limite: Animals / Humans Idioma: En Revista: Acta Neuropathol Commun Ano de publicação: 2024 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Acidente Vascular Cerebral / AVC Isquêmico Tipo de estudo: Prognostic_studies Limite: Animals / Humans Idioma: En Revista: Acta Neuropathol Commun Ano de publicação: 2024 Tipo de documento: Article