Antiviral effects of plasma and milk proteins: lactoferrin shows potent activity against both human immunodeficiency virus and human cytomegalovirus replication in vitro - PubMed

Comparative Study

Antiviral effects of plasma and milk proteins: lactoferrin shows potent activity against both human immunodeficiency virus and human cytomegalovirus replication in vitro

M C Harmsen et al. J Infect Dis. 1995 Aug.

Abstract

Native and chemically derivatized proteins purified from serum and milk were assayed in vitro to assess their inhibiting capacity on the cytopathic effect of human immunodeficiency virus (HIV)-1 and human cytomegalovirus (HCMV) on MT4 cells and fibroblasts, respectively. Only native and conformationally intact lactoferrin from bovine or human milk, colostrum, or serum could completely block HCMV infection (IC50 = 35-100 micrograms/mL). Moreover, native lactoferrin also inhibited the HIV-1-induced cytopathic effect (IC50 = 40 micrograms/mL). When negatively charged groups were added to lactoferrin by succinylation, there was a 4-fold stronger antiviral effect on HIV-1, but the antiviral potency for HCMV infection was mostly decreased. Lactoferrin likely exerts its effect at the level of virus adsorption or penetration (or both), because after HCMV penetrated fibroblasts, the ongoing infection could not be further inhibited.

Comment in

• Anti-human cytomegalovirus effects of breast milk.

  Numazaki K, Asanuma H, Hotsubo T, Chiba S. Numazaki K, et al. J Infect Dis. 1996 Aug;174(2):444-5. doi: 10.1093/infdis/174.2.444. J Infect Dis. 1996. PMID: 8699086 No abstract available.

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