Lonomia obliqua’s hemolymph: new horizons to antibiotics

Hayashida, Patricia Yumi; Silva, Pedro Ismael da; Mendonça, Ronaldo Zucatelli

doi:10.1016/j.toxicon.2019.06.121

Cited by 2 publications

(1 citation statement)

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“…During this period, insects lived and survived in almost all ecological niches on the planet, from deserts, polar regions, contaminated environments,, or extremely harmful to the development of life, developing protection and defense mechanisms for each adverse situation. Several studies have been carried out demonstrating the presence of pharmacologically active substances in the hemolymph of insects with antiviral action (Mendonça et al, 2023; Carvalho et al, 2022, Carmona et al, 2020; Coelho et al, 2018, Greco et al, 2009, Carmo et al, 2012), antimicrobial and antifungal action (Cantero et al, 2022, Hayashida et al 2019, Zhu et al, 2000, Gross et al, 1998; Johns et al, 1998; Lanz-Mendoza et al, 1996; Lowenberger et al, 1999) antifreeze (Kristiansen et al, 2005) hormonal (Huberman et al, 2000; Jones et al, 1993; Kurata et al, 1994; Lin et al, 1998), enzymatic effects, among others. (Guerrero et al, 1999; Hamdaoui et al, 1998; Jiang et al, 1999; Rosenfeld and Vanderberg, 1998; Shiotsuki et al, 2000; Yamamoto et al, 1999).…”

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confidence: 99%

Proteins with anti-apoptotic action in the hemolymph of caterpillars of the Megalopygidae family acts by maintaining the structure of the cellular cytoskeleton

Carvalho

Rofatto

Villar

et al. 2023

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Brazil has a very large biological variety, which is an almost inexhaustible source of substances of pharmacological and biotechnological interest. Several studies have demonstrated the presence of bioactive peptides in insect hemolymph and their potential use as therapeutic agents. However, few data are available regarding molecules extracted from insects with anti-apoptotic action. The objective of this work was to identify and isolate proteins from the hemolymph of caterpillars of the Megalopygidae family with pharmacological and biotechnological interest. Two species of this family were studied, Podalia sp and Megalopyge albicolis. Cytotoxicity tests on Vero and Sf-9 cells revealed that the hemolymph of both caterpillars were cytotoxic only at concentrations greater than 5%v/v. In the anti-apoptotic activity assays, it was verified that the supplementation of cell cultures with only 1% of hemolymph v/v is sufficient to inhibit cell death by apoptosis induced by different inducers such as terbutyl, actinomycin D, hydrogen peroxide or even by nutrient depletion. For this study, cells were staining with trypan blue, crystal violet and fluorescent markers to cytoskeleton (actin and tubulin), mitochondria membrane electric potential (JC-1) and apoptosis marker (acridine orange and ethidium). The protein responsible for anti-apoptotic action was isolated through gel filtration chromatography, using an AKTA purifier high-resolution liquid chromatography system. The hemolymph was fractionated into 3 pools for Podalia sp and 6 pools for M. abicolis. In the antiapoptotic tests, semi purified hemolymph from both caterpillars showed anti-apoptotic effect in VERO and SF-9 cells, pre-treated with only 1% v/v of hemolymph and induced to death by different and apoptotic inductors. Was observed that the molecule with anti-apoptotic effect are present in pool 3 in both hemolymphs. This protector effect blocked and attenuated the disruption of the cytoskeleton (actin filaments), being that the protective effect also was observed on the integrity of the mitochondrial membrane of SF-9 cells pre-treated with both hemolymphs and treated with the apoptosis inducer Terbutil at concentrations of 25 to 100uM.

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