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Isolation, Cryopreservation and Culture of Human Amnion Epithelial Cells for Clinical Applications
Published on: December 21, 2014
Biological activities of a human amniotic membrane interferon
G R Franco1, A F de Carvalho, E G Kroon
1Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.
Human amniotic membrane interferon (IFN-AM), a novel interferon, inhibits cell growth and induces interferon-stimulated genes (ISGs). This interferon exhibits cross-species antiviral activity, suggesting it
Area of Science:
- Immunology
- Molecular Biology
- Virology
Background:
- Human amniotic membrane interferon (IFN-AM) is antigenically distinct from known human interferons (IFN-alpha, -beta, -gamma) and tumor necrosis factor (TNF).
- Characterization of IFN-AM's biological activities is crucial for understanding its potential therapeutic applications.
Purpose of the Study:
- To analyze the biological activities of human amniotic membrane interferon (IFN-AM).
- To investigate IFN-AM's effects on cell growth, interferon-stimulated gene (ISG) induction, and antiviral activity.
Main Methods:
- Dose-dependent analysis of IFN-AM's effect on cell growth and thymidine incorporation.
- Measurement of mRNA induction for ISGs (6-16 and 2'-5' oligoadenylate synthetase [OAS]) following IFN-AM treatment.
- Time-course analysis of ISG mRNA accumulation and OAS enzyme levels.
- Assessment of antiviral activity in human and bovine cells.
Main Results:
- IFN-AM demonstrated dose-dependent inhibition of cell growth and thymidine incorporation, similar to IFN-beta.
- IFN-AM induced mRNA expression of the 6-16 gene and 2'-5' OAS, with distinct dose and time dependencies.
- IFN-AM exhibited significant cross-species antiviral activity, distinct from human IFN-alpha and -beta, and induced OAS enzyme levels comparable to IFN-alpha.
Conclusions:
- IFN-AM possesses anti-cellular activity and stimulates ISG transcriptional activation, akin to IFN-beta.
- IFN-AM effectively induces 2'-5' OAS expression, similar to IFN-alpha.
- The distinct cross-species antiviral profile and biological activities suggest IFN-AM represents a novel subtype of Type I interferon.
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