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<p>Modified citrus pectin (MCP), a polysaccharide from citrus fruits, modulates galectin-3 (Gal-3) and immune responses. Although MCP exhibits notable immunomodulatory effects, its role in drug-induced splenic and systemic toxicity remains unexplored. This study investigated the effects of MCP modulation on splenic immune remodeling and galectin expression in a rat model of cisplatin-induced toxicity. Wistar rats were divided into four groups (<i>n</i> = 5 animals/group): control (SHAM), MCP (100&#xa0;mg/kg/day for 7 days), cisplatin (CIS, 10&#xa0;mg/kg/day for 3 days), and MCP + CIS. Spleens were collected 6&#xa0;h after the final cisplatin dose. Cisplatin induced splenic structural disorganization and selectively reduced nitric oxide levels without broadly affecting antioxidant enzymes. Cisplatin treatment was associated with increased CD3⁺ T cell labeling and enhanced tissue expression of Gal-1, -3, and − 9. MCP administration did not restore splenic architecture but promoted increased hemosiderin deposition in the red pulp, suggestive of enhanced erythrophagocytosis and altered iron handling, and markedly reduced CD3⁺ T cell immunoreactivity. MCP associated with cisplatin also reduced Gal-1 and Gal-3 levels and altered the relationship between galectins and splenic immune cell populations. Correlation analyses revealed positive associations between Gal-1, -3, and − 9 and CD68⁺ macrophages, as well as a selective association between Gal-3 and CD3⁺ T cells, exclusively in MCP + CIS animals. MCP does not mitigate cisplatin-induced splenic damage but alters immune cell distribution and galectin-related responses during cisplatin exposure.</p>

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Modified citrus pectin modulates splenic immune responses and galectin expression following cisplatin treatment in Wistar rats

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年5月13日

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  • Diego Dias dos Santos,
  • Artur Francisco da Silva Neto,
  • Laura Santana de Chiara,
  • Mab Pereira Corrêa,
  • Gisela Rodrigues da Silva-Sasso,
  • José Marcos Sanches,
  • Rinaldo Florencio-Silva,
  • Lila Missae Oyama,
  • Cristiane Damas Gil

摘要

Modified citrus pectin (MCP), a polysaccharide from citrus fruits, modulates galectin-3 (Gal-3) and immune responses. Although MCP exhibits notable immunomodulatory effects, its role in drug-induced splenic and systemic toxicity remains unexplored. This study investigated the effects of MCP modulation on splenic immune remodeling and galectin expression in a rat model of cisplatin-induced toxicity. Wistar rats were divided into four groups (n = 5 animals/group): control (SHAM), MCP (100 mg/kg/day for 7 days), cisplatin (CIS, 10 mg/kg/day for 3 days), and MCP + CIS. Spleens were collected 6 h after the final cisplatin dose. Cisplatin induced splenic structural disorganization and selectively reduced nitric oxide levels without broadly affecting antioxidant enzymes. Cisplatin treatment was associated with increased CD3⁺ T cell labeling and enhanced tissue expression of Gal-1, -3, and − 9. MCP administration did not restore splenic architecture but promoted increased hemosiderin deposition in the red pulp, suggestive of enhanced erythrophagocytosis and altered iron handling, and markedly reduced CD3⁺ T cell immunoreactivity. MCP associated with cisplatin also reduced Gal-1 and Gal-3 levels and altered the relationship between galectins and splenic immune cell populations. Correlation analyses revealed positive associations between Gal-1, -3, and − 9 and CD68⁺ macrophages, as well as a selective association between Gal-3 and CD3⁺ T cells, exclusively in MCP + CIS animals. MCP does not mitigate cisplatin-induced splenic damage but alters immune cell distribution and galectin-related responses during cisplatin exposure.