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Updated: Oct 8, 2025
Tailoring In Vivo Cytotoxicity Assays to Study Immunodominance in Tumor-specific CD8+ T Cell Responses
Published on: May 6, 2019
Sida tuberculata: In vitro cytotoxicity and in vivo anti-inflammatory effect
Hemerson Silva da Rosa1, Marí Castro Santos2, Marcio Tavares Costa1
1Biochemistry and Toxicology of Natural and Synthetic Products Laboratory, Federal University of Pampa, Uruguaiana, Rio Grande do Sul, Brazil; Postgraduate Program in Biochemistry, Federal University of Pampa, Uruguaiana, Rio Grande do Sul, Brazil.
Ethnopharmacological Relevance:
Sida tuberculata R. E. Fries (Malvaceae) is a pioneer species considered a weed in farm fields in Southern Brazil. Widely distributed in South Brazil, S. tuberculata is popularly used to treat inflammatory conditions.
Aims Of The Study:
The current study aimed to assess the in vitro cytotoxic and in vivo anti-inflammatory properties of S. tuberculata.
Materials And Methods:
Initially, extracts obtained from leaves (STLE) and roots (STRE) were submitted to cytotoxicity tests using human leukocytes (non-malignant cell line) and HepG2 and MCF-7 (tumor cell lines). In sequence, anti-inflammatory properties were investigated against carrageenan-induced peritonitis model.
Results:
In vitro analyses displayed a significant decrease in human leukocytes viability without genotoxic damage. IC50 results from tumor cells presented significant decrease in cell viability, slightly more pronounced for STRE. In addition, STLE significantly inhibited the inflammatory and oxidative parameters (TBARS, NPSH, SOD, MPO activity, cell influx, and cytokines release).
Conclusion:
Our findings indicate S. tuberculata extracts have cytotoxic potential more pronounced on tumor cell lines, as well as leaves extract shows a significant reduction in acute inflammation process, as already reported for Sida genus and specifically for this species.
