Histopathological Effects of Seed Oil of Moringa oleifera Lam. on Albino Mice Infected with Plasmodium berghei (NK65)

The study assessed the histopathological effects of seed oil of Moringa oleifera on albino mice infected with Plasmodium berghei. This work included a good idea in the treatment of a causing agent of malaria with Moringa seed oil as bio-natural treatment. Thirty-five mice were divided equally and grouped into five. The mice were acclimatised for seven days and thereafter infected with 0.2 mL Plasmodium berghei (NK65) parasite. The parasites were allowed to establish in the mice for five days before commencement of treatment. Group A - negative control (untreated), group B - positive control (10mg/kg chloroquine treated), group C, D and E were respectively treated with 800, 400, 200 mg/kg seed oil of Moringa oleifera. By oral administration of 0.2 mL of treatment dose, treatment was carried out in four consecutive days and the mice were sacrificed five days thereafter. The liver and kidney extracted from the mice were processed for histological studies. Findings revealed group A had the least packed cell volume (PCV) of 22.23±1.98% and group B had the most PCV of 48.31±1.55% after treatment. The PCV in groups C, D and E were 45.34±1.11%, 41.40±1.00% and 39.19±1.82% respectively after treatment. Coagulative necrosis and inflammation characterised the liver and kidney of mice in groups C and D. Lesions were observed in all the liver of mice treated with the seed oil of M. oleifera and chloroquine. Overall, it can be inferred that the higher the PCV of mice after treatment, the higher the performance of chemotherapeutic agents against parasitaemia. Thus, at 800, 400 and 200 mg/kg dosage, the seed oil of Moringa oleifera could possibly treat malaria. However, administration of a higher dose of the oil and chloroquine should be with caution as both drugs may pose adverse effects on the kidney and liver.

Histopathological effects of silver nanoparticles in Rhamdia quelen after oral exposure

The studies about silver nanoparticles (AgNP) increased in the last years but few is known about their effects in Brazilian neotropical freshwater fish species. The current study investigated the effects of AgNP on adult silver catfish Rhamdia quelen after subchronic oral exposure. After nanoparticle (NP) size and area characterization fish were administrated with three different doses for 15 days (0.03, 0.3 and 3 µg g-1). The concentration of silver in liver and kidney was measured to evaluate the bioaccumulation and discuss its effects in the target organs. Liver bioaccumulated 15, 1.7 and 0.2 % of administered doses while kidney bioaccumulated 1.33, 0.33 and 0.9 % (respectively for 0.03, 0.3 and 3 µg g-1). The histopathological findings were considered in both organs to evaluate the effects of AgNP, according to Bernet’s Lesion Index (BLI). Also were included the melano-macrophages center (MMC) and new nephrons (NN) counting respectively in liver and posterior kidney. The results revealed morphological injuries as inflammation in both studied organs and vascular congestion and steatosis in liver, in a concentration dependent way. The presence of AgNP in the tissues revealed the bioavailability of the nanoparticle while the damages and morphological disturbs showed the potential risk of exposure in R. quelen, even under environmental relevant concentrations.