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Polysaccharides from Scutellaria barbata D. Don: Anti-ulcerative colitis activity evaluation and structure feature
Shaojie Zhang1, Tanggan Wang2, Meifeng Li2
1Guangdong Provincial Key Laboratory of Research and Development of Natural Drugs, School of Pharmacy, The Affiliated Dongguan Songshan Lake Central Hospital, Guangdong Medical University, Dongguan 523808, China; Institute of Traditional Chinese Medicine Health Industry, China Academy of Chinese Medical Sciences, Nanchang 330115, China.
Polysaccharides from Scutellaria barbata (SBP80) show therapeutic potential for ulcerative colitis (UC). These compounds, SBP80-1 and SBP80-2, reduced inflammation and oxidative stress in mouse and zebrafish models of UC.
Area of Science:
- Pharmacology
- Natural Products Chemistry
- Gastroenterology
Background:
- Scutellaria barbata D. Don is a traditional Chinese medicine used for its anti-inflammatory properties.
- Polysaccharides are identified as key bioactive components in S. barbata.
- Ulcerative colitis (UC) is a chronic inflammatory bowel disease requiring novel therapeutic strategies.
Purpose of the Study:
- To investigate the therapeutic effects of a heteropolysaccharide (SBP80) from S. barbata on ulcerative colitis (UC).
- To characterize the isolated polysaccharides (SBP80-1 and SBP80-2) and evaluate their anti-UC activities.
- To explore the structure-activity relationship of S. barbata polysaccharides in UC treatment.
Main Methods:
- Water extraction and purification of polysaccharides from S. barbata.
- In vivo studies using mouse models of UC to assess therapeutic efficacy.
- In vivo zebrafish models to evaluate anti-inflammatory and anti-oxidative effects.
- Structural analysis including molecular weight determination, monosaccharide composition, and methylation analysis.
Main Results:
- SBP80 significantly ameliorated UC symptoms in mice, improving body weight, disease activity index, colon length, and reducing inflammatory markers.
- Two polysaccharides, SBP80-1 (7.2 kDa) and SBP80-2 (292.3 kDa), were isolated and characterized.
- Both SBP80-1 and SBP80-2 demonstrated efficacy in zebrafish models, reducing intestinal inflammation and oxidative stress.
- SBP80-2 showed superior anti-UC activity compared to SBP80-1, potentially due to its higher glucuronic acid and xylose content and distinct linkage patterns.
Conclusions:
- Scutellaria barbata polysaccharides, particularly SBP80-2, exhibit significant therapeutic potential for ulcerative colitis.
- The structural characteristics of S. barbata polysaccharides influence their anti-UC activity.
- These findings suggest S. barbata polysaccharides as promising natural agents for UC treatment.
