Indican from Añil (Indigofera suffruticosa Miller) as an herbal protective agent to the liver.

OBJECTIVE: To investigate the antitumor activity of mice bearing sarcoma 180 cell lines treated with indican of Indigofera suffruticosa and the histological and morphometric analysis on the liver of those animals. STUDY DESIGN: The mice were divided into 3 groups: Group 1 (G1) and Group 3 (G3) bearing sarcoma 180, and Group 2 (G2) without sarcoma 180. G1 and G2 (controls) were administered saline; G3 was treated with indican (25 mg/kg, i.p.). RESULTS: The purified indican after subchronic treatment did not significantly reduce the mean volume of sarcoma 180 when compared with control G1. HistopathologicaI and morphometric analysis of the liver of G2 and G3 did not show degenerated areas, compared to. G1 which showed pronounced destruction of the liver architectures. CONCLUSION: The results showed that the inhibition of solid tumor growth was not significant; however, the indican from leaves of I. suffruticosa preserved the liver architectures, suggesting its use as an alternative protective agent of the liver tissue.

Effect of Moringa oleifera lectin on development and mortality of Aedes aegypti larvae.

Aedes aegypti larvae have developed tolerance to many insecticides used for mosquito control. Moringa oleifera seeds contain a water-soluble lectin (WSMoL) and this paper reports the effect of M. oleifera seed extracts (MoE(1-15)) and WSMoL on development and survival of A. aegypti larvae. WSMoL peptide from in-gel trypsin digestion is also described. MoE(1-15) showed hemagglutinating activity and WSMoL had similarity with flocculating proteins from M. oleifera seeds. MoE(1) and MoE(3) delayed larval development which stopped in the third instar (L3) in MoE(6) and MoE(15). Significant (p<0.0001) larval mortality was only detected in MoE(15). Native WSMoL showed larvicidal activity (LC(50) 0.197 mg mL(-1)) and heated lectin, without hemagglutinating activity, did not kill fourth instar (L4) larvae. Optical microscopy showed that live L4 from MoE(1) presented underlying epithelium, increased gut lumen and hypertrophic segments; dead L4 from WSMoL were absent of underlying epithelium, had increased gut lumen and hypertrophic segments. The presence of hemagglutinating activity in the extracts suggests that soluble lectin promotes the delay of larval development and mortality; furthermore, the absence of larvicidal activity in heat-denatured WSMoL strengthens the involvement of lectin in this activity mechanism.