WAS Science Nature (WASSN) ISSN: 2766-7715

Insect Antimicrobial Peptides (AMPs) as Next-Generation Therapeutics: Structural Diversity, Molecular Regulation, Mechanisms of Action, and Translational Strategies Against Multidrug Resistance

Fri, 10 Jul 2026 00:00:00 +0200

Background: The rapid escalation of antimicrobial resistance (AMR), particularly among the "ESKAPE" pathogens, presents an existential threat to global clinical medicine. Because conventional small-molecule antibiotics are highly vulnerable to resistance acquisition via single-nucleotide polymorphisms or horizontal gene transfer, there is an urgent need to engineer next-generation therapeutics with resilient, biophysical modes of action. Antimicrobial peptides (AMPs) derived from the Class Insecta represent an evolutionary goldmine, offering robust host-defense platforms shaped by survival in pathogen-dense ecological niches.

Objective: This review addresses a historical fragmentation in literature by providing a translation-focused synthesis that comprehensively bridges upstream molecular regulatory networks with downstream pharmacological performance and modern formulation engineering.

Methods/Structure: The manuscript structurally classifies the four primary families of insect AMPs—linear $\alpha$-helical cecropins, disulfide-stabilized cysteine-rich defensins, intracellular-targeting proline-rich peptides (PrAMPs), and macromolecular glycine-rich proteins (e.g., diptericins, attacins)—and correlates their unique structural topography with specific, multi-target mechanisms of action. Furthermore, it maps the underlying upstream activation pathways, including the Toll, Immune Deficiency (Imd), and JAK-STAT cascades, while examining complementary humoral factors and antioxidant defense systems.

Results & Discussion: While insect-derived AMPs exhibit exceptional in vitro potency, direct direct lysis mechanisms often cross-react with eukaryotic membranes, leading to mammalian cytotoxicity and hemolytic vulnerabilities. Moreover, native linear peptides suffer from rapid proteolytic degradation by host proteases, resulting in a short plasma half-life. This review evaluates how these challenges, alongside high chemical manufacturing costs and emerging microbial countermeasures (e.g., membrane remodeling, active efflux networks), have historically blocked clinical translation.

Conclusion & Future Directions: To resolve these bottlenecks, we highlight cutting-edge 2026 strategies, emphasizing how artificial intelligence (AI)-driven generative and predictive modeling accelerates the de novo design of synthetic peptides with optimized therapeutic indices. Concurrently, we detail the implementation of chemical modifications (peptidomimetics, D-amino acid substitutions, cyclization, PEGylation) and advanced nanocarrier delivery frameworks (liposomes, nanoparticles, hydrogels) to systematically shield sequences from degradation, eliminate host toxicity, and chart a definitive regulatory roadmap toward successful clinical translation.

Systemic Preventive and Detoxifying Efficacy of Phenolics and Flavonoids Against Carcinogenesis: A Comprehensive Analysis of the Transition from Cellular Protection to Systemic Metabolic Resilience

Thu, 30 Jul 2026 00:00:00 +0200

Hepatocellular carcinoma (HCC) remains a formidable global health challenge, characterized by high mortality and strong links to chronic liver injury, metabolic dysfunction-associated steatotic liver disease (MASLD), and cirrhosis. Conventional therapeutic modalities show limited efficacy in advanced disease stages, highlighting an urgent need for effective chemopreventive and protective strategies. Dietary phenolics and flavonoids—secondary plant metabolites defined by their characteristic C6-C3-C6 phenylpropanoid scaffolds—have emerged as powerful bio-modulators capable of shifting cellular dynamics from localized antioxidant protection to systemic metabolic resilience. This review comprehensively synthesizes the multi-tiered mechanisms through which phenolic compounds exert anti-carcinogenic and detoxifying effects, with a particular focus on the transition from chronic inflammation to malignancy. Mechanistically, these compounds disrupt the pathogenic pro-inflammatory triad (NF-κB, STAT3, and COX-2), trigger apoptotic cascades (Bax/Bcl-2, caspases), and restore autophagic flux (AMPK/mTORC1) to eliminate damaged cellular components. At the core of their detoxifying potential is the activation of the Nuclear Factor Erythroid 2-Related Factor 2 (Nrf2)-Antioxidant Response Element (ARE) axis. Activation of Nrf2 upregulates Phase II biotransformation and antioxidant enzymes (GSTs, NQO1, HO-1, GCL), establishing a "metabolic shield" that neutralizes and excretes electrophilic carcinogens while reinforcing cellular glutathione (GSH) pools. Furthermore, we address the dual role of Nrf2—the "Nrf2 paradox"—wherein transient activation confers chemoprevention in normal tissue, whereas constitutive hyperactivation drives chemoresistance and metabolic survival in established tumors. To bridge preclinical findings with clinical applications, we explore advanced delivery technologies (e.g., liposomes, nano-emulsions) that overcome poor phenolic bioavailability, alongside biosynthetic microbial chassis engineering and personalized, biomarker-driven supplementation.

At the Intersection of Vector Competence and Thermal Eco-Physiology: Molecular Determinants of Arboviral Adaptation and Transmission in Rift Valley Fever Vectors

Wed, 05 Aug 2026 00:00:00 +0200

Rift Valley Fever Virus (RVFV; family Phenuiviridae, genus Phlebovirus) presents a severe global biosecurity threat due to its high zoonotic burden, capacity for multi-species livestock epizootics, and potential for rapid transboundary dissemination driven by climate anomalies. Traditional epidemiological paradigms have categorized RVFV dynamics into distinct floodwater Aedes reservoir cycles and secondary Culex amplification cascades. However, emerging evidence highlights a far more complex, multi-vector landscape encompassing diverse Culicidae guilds (Anopheles, Mansonia, Eretmapodites, and Coquillettidia) across expanding non-endemic boundaries. This review synthesizes recent advances at the convergence of molecular vector biology and thermal eco-physiology to evaluate how shifting environmental baselines alter host-pathogen interactions within the mosquito vector. We examine the molecular architecture of intra-vector anatomical barriers—specifically the Midgut Infection Barrier (MIB), Midgut Escape Barrier (MEB), Salivary Gland Infection Barrier (SGIB), and Salivary Gland Escape Barrier (SGEB)—and detail how host innate immune cascades, including exogenous small interfering RNA (siRNA) and PIWI-interacting RNA (piRNA) pathways, restrict viral dissemination. Crucially, we evaluate how microclimatic temperature elevations modulate these molecular checkpoints. Thermal performance curves demonstrate that ambient warming accelerates viral replication kinetics and shortens the Extrinsic Incubation Period (EIP), while acute thermal stress compromises midgut basal lamina integrity and dampens antiviral immune signaling. By bridging molecular tissue tropism, vector innate immunity, and thermal performance kinetics with high-throughput field xenomonitoring, this synthesis provides an integrated framework for predicting, mapping, and mitigating climate-driven RVFV spillover into vulnerable Mediterranean, Middle Eastern, and European basins.