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. 2021 Feb 9;8:606782. doi: 10.3389/fnut.2021.606782

Table 4.

Effect of PDFGS on virus-host interaction & virus-cell entry function.

Agent Targets/Effect* Viruses References
Curcumin Antiviral agent-virus binding ↑ IAV (10)
R. acetosa extract, EGCG Antiviral agent-virus binding ↑
Viral penetration ↓
Viral attachment to host ↓
IAV (55)
EBN Antiviral Agent-viral interaction ↑, HA activity ↓ IAV (57)
Quercetin Antiviral agent-viral interaction ↑ RSV, hPIV-3 (58)
EGCG Viral envelop damage ↑, Viral penetration to host ↓ IAV, IBV (22)
Germacrone Viral attachment to host cells↓ IAV, IBV (60)
Quercetin Viral entry ↓ IAV (70)
Sulphated polysaccharide from Aphanothece sacrum Viral attachment to host cells↓ IAV (61)
Lectin-like compounds in Fruit-juice concentrate of Japanese plum (compounds) HA activity ↓ IAV (67)
Concanavalin A, lens culinaris agglutinin and peanut agglutinin Actin disruption ↑, Viral attachment to host cells ↓, antiviral Agent-host interaction ↑ hPIV-2 (73)
Quercetin Antiviral agent-virus HA2 binding ↑ IAV (70)
Green tea, Guava tea Viral heamagglutination ↓ IAV (66)
Z. officinale Viral attachment↓, viral penetration ↓ RSV (19)
18β-GA Viral attachment↓, viral penetration ↓ RSV (20)
Caffeic, Chlorogenic, Gallic acid Viral attachment to host cells↓ HCoV-NL63 (44)
Flavonoids(Isorhamnetin, quercetin, kaempferol) Viral attachment to host cells↓ IAV (51)
Isorhamnetin HA activity ↓ IAV (51)
Blackcurrant extract Viral attachment to host cells ↓ AdV, IBV, IAV, RSV (48)
P. oleracea extract Antiviral agent-virus binding ↑ IAV (25)
Adlay tea Viral attachment to host cells ↓ IAV, IBV (16)
HS HA activity ↓ IAV (45)
Tannins (gallic acid, pentagalloylglucose, tannic acid, EGCG) HA activity ↓, antiviral agent-virus binding ↑, antiviral agent –host cell binding ↑ IAV (41)
Polysaccharide extract from marine algae HA activity ↓ IAV (23)
*

only effects that are significantly different from the control are shown; ↓Parameter is significantly lower than the untreated virally- infected model; ↑Parameter is significantly higher than the untreated virally- infected model.

18β-GA, 18β-glycyrrhetinic acid; AdV, Adenovirus; EBN, Edible bird nest; EGCG, Epigallocatechin gallate; HA, hemagglutinin; HA2, fusion peptide; HCoV-NL63, Human coronavirus NL63; hPIV-2, Human parainfluenza virus type 2; hPIV-3, Human parainfluenza virus type 3; HS, Hibiscus sabdariffa L; IAV, influenza A virus; IBV, Influenza B virus; P. oleracea L, Portulaca oleracea L; R. acetosa, Rumex acetosa; RSV, Respiratory syncytial virus; Z. officinale, Zingiber officinale.