Polysaccharides derived from Spirulina platensis inhibited Singapore grouper iridovirus by impeding the entry of viral particles.
Int J Biol Macromol
; 258(Pt 2): 128860, 2024 Feb.
Article
in En
| MEDLINE
| ID: mdl-38123030
ABSTRACT
Attributable to the rapid dissemination and high lethality of Singapore grouper iridovirus (SGIV), it has caused significant economic losses for marine fish aquaculture in China and Southeast Asian nations. Hence, there is an urgent need to find antiviral drugs that are both safe and effective. In this study, a novel heteropolysaccharide named Spirulina platensis polysaccharides (SPP) was purified and characterized from S. platensis. The molecular weight of SPP is 276 kDa and it mainly consists of Glc and Rha, followed by minor components such as Gal, Xyl, and Fuc. The backbone of SPP was determined to be â2) -ß-Rhap-(1 â 4) -α-Fucp-(1 â [2) -α-Rhap-(1] 2[â6)-α-Glcp-(1] 4[â 4) -α-Glcp-(1] 8[â 4) -ß-Glcp-(1]2â, with branches of ß-Galp, α-Xylp and α-Glcp. SPP significantly inhibited SGIV-induced cytopathic effects (CPEs), viral gene replication and viral protein expression. The antiviral mechanism of SPP was associated with the disruption of SGIV entry to host cells. Furthermore, it was not observed that SPP made statistically significant impact on the expression of interferon-related cytokines. Our results offered novel insights into the potential utilization of spirulina polysaccharides for combating aquatic animal viruses.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Bass
/
Iridovirus
/
Spirulina
/
Fish Diseases
Limits:
Animals
Country/Region as subject:
Asia
Language:
En
Journal:
Int J Biol Macromol
Year:
2024
Document type:
Article
Affiliation country:
China