Anti‐influenza virus effects of cocoa

BACKGROUND: Cocoa contains biologically active ingredients that have broad‐spectrum antimicrobial activity, which includes an inhibitory effect on influenza virus infection. RESULTS: A cocoa extract (CE) was prepared by treating defatted cocoa powder with boiling water. The extract demonstrated dose...

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Veröffentlicht in:Journal of the science of food and agriculture 2016-03, Vol.96 (4), p.1150-1158
Hauptverfasser: Kamei, Masanori, Nishimura, Hiroshi, Takahashi, Toshio, Takahashi, Nobuaki, Inokuchi, Koichi, Mato, Takashi, Takahashi, Kazuo
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container_end_page 1158
container_issue 4
container_start_page 1150
container_title Journal of the science of food and agriculture
container_volume 96
creator Kamei, Masanori
Nishimura, Hiroshi
Takahashi, Toshio
Takahashi, Nobuaki
Inokuchi, Koichi
Mato, Takashi
Takahashi, Kazuo
description BACKGROUND: Cocoa contains biologically active ingredients that have broad‐spectrum antimicrobial activity, which includes an inhibitory effect on influenza virus infection. RESULTS: A cocoa extract (CE) was prepared by treating defatted cocoa powder with boiling water. The extract demonstrated dose‐dependent inhibition of infection in Madin–Darby canine kidney (MDCK) cells infected with human influenza virus A (H1N1, H3N2), human influenza virus B and avian influenza viruses (H5N1, H5N9). CE inhibited viral adsorption to MDCK cells. Animal experiments showed that CE significantly improved survival in mice after intra‐nasal administration of a lethal dose of influenza virus. In human intervention trials, participants were allocated to two groups, one in which the participants ingested cocoa for 3 weeks before and after vaccination against A(H1N1)pdm2009 influenza virus and another in which the participants did not ingest cocoa. Neutralizing antibody titers against A(H1N1)pdm2009 influenza virus increased significantly in both groups; however, the extent of the increase was not significantly different between the two groups. Although natural killer cell activity was also elevated in both groups, the increase was more substantial in the cocoa intake group. CONCLUSION: Drinking cocoa activates natural immunity and enhances vaccination‐induced immune response, providing stronger protection against influenza virus infection and disease onset. © 2015 Society of Chemical Industry
doi_str_mv 10.1002/jsfa.7197
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RESULTS: A cocoa extract (CE) was prepared by treating defatted cocoa powder with boiling water. The extract demonstrated dose‐dependent inhibition of infection in Madin–Darby canine kidney (MDCK) cells infected with human influenza virus A (H1N1, H3N2), human influenza virus B and avian influenza viruses (H5N1, H5N9). CE inhibited viral adsorption to MDCK cells. Animal experiments showed that CE significantly improved survival in mice after intra‐nasal administration of a lethal dose of influenza virus. In human intervention trials, participants were allocated to two groups, one in which the participants ingested cocoa for 3 weeks before and after vaccination against A(H1N1)pdm2009 influenza virus and another in which the participants did not ingest cocoa. Neutralizing antibody titers against A(H1N1)pdm2009 influenza virus increased significantly in both groups; however, the extent of the increase was not significantly different between the two groups. Although natural killer cell activity was also elevated in both groups, the increase was more substantial in the cocoa intake group. 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Sci. Food Agric</addtitle><description>BACKGROUND: Cocoa contains biologically active ingredients that have broad‐spectrum antimicrobial activity, which includes an inhibitory effect on influenza virus infection. RESULTS: A cocoa extract (CE) was prepared by treating defatted cocoa powder with boiling water. The extract demonstrated dose‐dependent inhibition of infection in Madin–Darby canine kidney (MDCK) cells infected with human influenza virus A (H1N1, H3N2), human influenza virus B and avian influenza viruses (H5N1, H5N9). CE inhibited viral adsorption to MDCK cells. Animal experiments showed that CE significantly improved survival in mice after intra‐nasal administration of a lethal dose of influenza virus. In human intervention trials, participants were allocated to two groups, one in which the participants ingested cocoa for 3 weeks before and after vaccination against A(H1N1)pdm2009 influenza virus and another in which the participants did not ingest cocoa. Neutralizing antibody titers against A(H1N1)pdm2009 influenza virus increased significantly in both groups; however, the extent of the increase was not significantly different between the two groups. Although natural killer cell activity was also elevated in both groups, the increase was more substantial in the cocoa intake group. 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Sci. Food Agric</addtitle><date>2016-03-15</date><risdate>2016</risdate><volume>96</volume><issue>4</issue><spage>1150</spage><epage>1158</epage><pages>1150-1158</pages><issn>0022-5142</issn><eissn>1097-0010</eissn><coden>JSFAAE</coden><abstract>BACKGROUND: Cocoa contains biologically active ingredients that have broad‐spectrum antimicrobial activity, which includes an inhibitory effect on influenza virus infection. RESULTS: A cocoa extract (CE) was prepared by treating defatted cocoa powder with boiling water. The extract demonstrated dose‐dependent inhibition of infection in Madin–Darby canine kidney (MDCK) cells infected with human influenza virus A (H1N1, H3N2), human influenza virus B and avian influenza viruses (H5N1, H5N9). CE inhibited viral adsorption to MDCK cells. Animal experiments showed that CE significantly improved survival in mice after intra‐nasal administration of a lethal dose of influenza virus. In human intervention trials, participants were allocated to two groups, one in which the participants ingested cocoa for 3 weeks before and after vaccination against A(H1N1)pdm2009 influenza virus and another in which the participants did not ingest cocoa. Neutralizing antibody titers against A(H1N1)pdm2009 influenza virus increased significantly in both groups; however, the extent of the increase was not significantly different between the two groups. Although natural killer cell activity was also elevated in both groups, the increase was more substantial in the cocoa intake group. CONCLUSION: Drinking cocoa activates natural immunity and enhances vaccination‐induced immune response, providing stronger protection against influenza virus infection and disease onset. © 2015 Society of Chemical Industry</abstract><cop>Chichester, UK</cop><pub>John Wiley &amp; Sons, Ltd</pub><pmid>25847473</pmid><doi>10.1002/jsfa.7197</doi><tpages>9</tpages></addata></record>
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subjects active ingredients
Administration, Oral
adsorption
Adult
animal experimentation
Animals
Antimicrobial agents
Antiviral Agents - administration & dosage
Antiviral Agents - pharmacology
Antiviral Agents - therapeutic use
antiviral properties
Biological effects
Birds
Boiling
Cacao
Cocoa
cocoa (beverage)
cocoa powder
Disease Models, Animal
Dogs
dose response
drinking
Female
Human
human influenza
Humans
immune response
Immune system
immunostimulation
Influenza
Influenza A virus
Influenza A Virus, H1N1 Subtype - drug effects
Influenza A Virus, H3N2 Subtype - drug effects
Influenza A Virus, H5N1 Subtype - drug effects
Influenza B virus
Influenza virus
Influenza, Human - drug therapy
Influenza, Human - virology
Inhibitory Concentration 50
innate immunity
Kidneys
lethal dose
Male
Mice
Mice, Inbred BALB C
natural killer cells
neutralizing antibodies
NK cell activity
Phytotherapy
Plant Extracts - administration & dosage
Plant Extracts - pharmacology
Plant Extracts - therapeutic use
vaccination
Viruses
title Anti‐influenza virus effects of cocoa
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