This work aimed to investigate, for the first time, the chemical composition, antioxidant, antiparasitic, cytotoxicity, and antimicrobial activities of the aromatic plant Limonium oleifolium Mill. essential oil (EO) and organic extracts. L. oleifolium aerial parts essential oil was analyzed by GC‐FID and GC‐MS, and 46 constituents representing 98.25±1.12 % of the oil were identified. γ‐Muurolene (10.81±0.07 %), cis‐caryophyllene (7.71±0.06 %), o‐cymene (7.07±0.01 %) and α‐copaene (5.02±0.05 %) were the essential oil main compounds. The antioxidant activity of L. oleifolium EO and organic extracts (MeOH, CHCl3, AcOEt, BuOH) was explored using 2,2‐diphenyl‐1‐picrylhydrazyl (DPPH), ABTS, β‐carotene/linoleic acid, cupric reducing antioxidant capacity (CUPRAC), and ferric reducing power assays. The results showed that L. oleifolium EO exhibit antioxidant capacity (IC50=17.40±1.32 μg/mL for DPPH assay, IC50=29.82±1.08 μg/mL for β‐carotene assay, IC50=25.23±1.01 μg/mL for ABTS assay, IC50=9.11±0.08 μg/mL for CUPRAC assay and IC50=19.41±2.06 mg/mL for reducing power assay). Additionally, the EO showed significant activity against trophozoite form of Acanthamoeba castellanii (IC50=7.48±0.41 μg/mL) and promastigote form of Leishmania amazonensis (IC50=19.36±1.06 μg/mL) and low cytotoxicity on murine macrophages (LC50 90.23±1.09 μg/mL), as well as good antimicrobial activity against Staphylococcus aureus, Escherichia coli, Klebsiella oxytoca, and Pseudomonas aeruginosa. These results suggest that L. oleifolium essential oil is a valuable source of bioactive compounds presenting antioxidant, antiparasitic, and antimicrobial activities. Furthermore, it is considered nontoxic.

The extensive use of Lambda-cyhalothrin (LCT) has been associated with the various toxicities that non-target organisms can undergo including mammals. However, the mechanism of induced-LCT cytotoxicity in animal brain cells is still elusive, particularly in brain regions, notably the hippocampus, an area directly involved in cognitive function. This study aimed to investigate the neurotoxic effects in the rat hippocampus chronically exposed to LCT (0.18 mg/kg and 0.36 mg/kg), and the neuroprotective potential of Melissa officinalis L methanol extract (MOE) (200 mg/kg) against this toxicity. After experimental period (90 days), the redox status, the functional and structural integrity of the hippocampus mitochondria as well as the apoptotic signaling pathway were evaluated. The current findings suggest that LCT produces imbalance of mitochondrial redox status expressed by, on one side, increasing of stress markers such as protein carbonyls (PCO), malondialdehyde (MDA), and hydrogen peroxide (H2O2) levels; and on the other side, by a decline in the potential of antioxidant systems, namely the level of mitochondrial enzymatic activities of catalase (CAT), glutathione peroxidase (GPx), superoxide dismutase (SOD) and glutathione (GSH).This study also showed an increase in mitochondrial permeability, along with mitochondrial edema and considerable decrease in its O2 consumption. Moreover, the same results recorded an increase in caspase-3 and cytosolic cytochrome-c. Conversely, this study proved that all these toxic aspects induced by LCT were significantly mitigated when the administration of this synthetic pyrethroid was associated with MOE. Taken together, data of this study shed light on mitochondrial damage and apoptosis stimulation under the toxic effect of LCT and suggests that MOE is endowed with potent neuroprotective effect, possibly via its antioxidant and antiapoptotic properties.

Pesticides are chemicals used to fight agricultural pests. Their use causes extensive damage to both humans and animals, resulting in diseases mainly affecting the respiratory and digestive systems. Through this study, we evaluated the pneumotoxicity caused by a deltamethrin (DM) insecticide at a dose of 0.64mg.kg-1.day-1. We also evaluated the preventive and curative effect of the medicinal plant "citrullus colocynthis. L" antagonist of this toxicity at a dose of 150mg.kg-1.day-1. We carried out the experimental application on Wister rats as an animal model of exhalation. Several experiments were carried out on the activity of enzymes and vital indicators. This study revealed a decrease in the concentration of the protein accompanied by a decrease in the means of development of the body [25±0.23]. Then, our study showed that DM has an oxidative effect, resulting in a decrease in the level of GSH [0.05 ±0.00] and the enzymatic activity of GPx [0.34±0.05]. In addition to an increase in the level of MDA [4.90±0.72] and the enzymatic activity of GST [0.84±0.11]. In addition, the histological study carried out on a fragment of lung of rats treated with this pesticide showed changes in the histological structure of the lungs resulting in vascular congestion, infiltration of inflammatory cells, thickening of the walls of blood vessels, as we do. Observed intra-alveolar hemorrhages and hyperplasia of the alveolar lining. On the other hand, we have confirmed the preventive effect of the citrullus colocynthis. L after treatment with this pesticide, which has an anti-oxidant activity, which can reduce the intensity of the oxidative stress resulting from deltamethrin and its effectiveness. In the treatment of lung, tissue effected by this pesticide and it is stored in its natural state.