From antigen uptake to immune modulation: the multifaceted potential of peptide nanofibers as vaccine nanocarriers

Hassan, Hatem A. F. M.; Haider, Mohamed; Fahmy, Sherif Ashraf

doi:10.1039/d4ma00075g

Mater. Adv.

2024

DOI: 10.1039/d4ma00075g

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From antigen uptake to immune modulation: the multifaceted potential of peptide nanofibers as vaccine nanocarriers

Hatem A. F. M. Hassan,

Mohamed Haider,

Sherif Ashraf Fahmy

Abstract: Spanning from the mitigation of pathogenic diseases via protective immunity to the provision of therapeutic solutions for other debilitating ailments, immune-based interventions have showcased promising and significant outcomes. Peptide nanofibers...

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Cited by 3 publications

References 133 publications

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Preparation and Characterization of Tiamulin-Loaded Niosomes for Oral Bioavailability Enhancement in Mycoplasma-Infected Broilers

Abonashey,

Fouad,

Hassan

et al. 2024

Micro

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Mycoplasma infections pose significant challenges in the poultry industry, necessitating effective therapeutic interventions. Tiamulin, a veterinary antibiotic, has demonstrated efficacy against Mycoplasma species. However, the emergence of resistant Mycoplasma species could dramatically reduce the therapeutic potential, contributing to economic losses. Optimizing the tiamulin’s pharmacokinetic profile via nanocarrier incorporation could enhance its therapeutic potential and reduce the administration frequency, ultimately reducing the resistant strain emergence. Niosomes, a type of self-assembled non-ionic surfactant-based nanocarrier, have emerged as a promising drug delivery system, offering improved drug stability, sustained release, and enhanced bioavailability. In this study, niosomal nanocarriers encapsulating tiamulin were prepared, characterized and assessed in Mycoplasma-inoculated broilers following oral administration. Differential scanning colorimetry (DSC) confirmed the alterations in the crystalline state following components integration into the self-assembled structures formed during the formulation procedure. Transmission electron microscopy (TEM) showed the spherical nanostructure of the formed niosomes. The formulated nanocarriers exhibited a zeta potential and average hydrodynamic diameter of −10.65 ± 1.37 mV and 339.67 ± 30.88 nm, respectively. Assessment of the pharmacokinetic parameters following oral administration to Mycoplasma gallisepticum-infected broilers revealed the ability of the niosomal nanocarriers to increase the tiamulin’s bioavailability and systemic exposure, marked by significantly higher area under the curve (AUC) (p < 0.01) and prolonged elimination half-life (T1/2) (p < 0.05). Enhanced bioavailability and prolonged residence time are crucial factors in maintaining therapeutic concentrations at reduced doses and administration frequencies. This approach provides a viable strategy to decrease the risk of subtherapeutic levels, thereby mitigating the development of antibiotic resistance. The findings presented herein offer a sustainable approach for the efficient use of antibiotics in veterinary medicine.

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Preparation and Characterization of Tiamulin-Loaded Niosomes for Oral Bioavailability Enhancement in Mycoplasma-Infected Broilers

Abonashey,

Fouad,

Hassan

et al. 2024

Micro

View full text Add to dashboard Cite

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Sustainable Nanomedicine: Enhancement of Asplatin’s Cytotoxicity In Vitro and In Vivo Using Green-Synthesized Zinc Oxide Nanoparticles Formed via Microwave-Assisted and Gambogic Acid-Mediated Processes

Hassan,

Sedky,

Nafie

et al. 2024

Molecules

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Chemoresistance encountered using conventional chemotherapy demands novel treatment approaches. Asplatin (Asp), a novel platinum (IV) prodrug designed to release cisplatin and aspirin in a reductive environment, has demonstrated high cytotoxicity at reduced drug resistance. Herein, we investigated the ability of green-synthesized nanocarriers to enhance Asp’s efficacy. Zinc oxide nanoparticles (ZnO-NPs) were synthesized using a green microwave-assisted method with the reducing and capping agent gambogic acid (GA). These nanoparticles were then loaded with Asp, yielding Asp@ZnO-NPs. Transmission electron microscopy was utilized to study the morphological features of ZnO-NPs. Cell viability studies conducted on MDA-MB-231 breast cancer cells demonstrated the ability of the Asp@ZnO-NPs treatment to significantly decrease Asp’s half-maximal inhibitory concentration (IC50) (5 ± 1 µg/mL). This was further demonstrated using flow cytometric analysis that revealed the capacity of Asp@ZnO-NPs treatment to significantly increase late apoptotic fractions. Furthermore, in vivo studies carried out using solid Ehrlich carcinoma-bearing mice showed significant tumor volume reduction with the Asp@ZnO-NPs treatment (156.3 ± 7.6 mm3), compared to Asp alone (202.3 ± 8.4 mm3) and untreated controls (342.6 ± 10.3 mm3). The histopathological analysis further demonstrated the increased necrosis in Asp@ZnO-NPs-treated group. This study revealed that Asp@ZnO-NPs, synthesized using an eco-friendly approach, significantly enhanced Asp’s anticancer activity, offering a sustainable solution for potent anticancer formulations.

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Synergistic Enhancement of Carboplatin Efficacy through pH-Sensitive Nanoparticles Formulated Using Naturally Derived Boswellia Extract for Colorectal Cancer Therapy

Fahmy,

Sedky,

Hassan

et al. 2024

Pharmaceutics

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Carboplatin (Cp) is a potent chemotherapeutic agent, but its effectiveness is constrained by its associated side effects. Frankincense, an oleo-gum resin from the Boswellia sacra tree, has demonstrated cytotoxic activity against cancer cells. This study explored the synergistic potential of nanoparticles formulated from Boswellia sacra methanolic extract (BME), to enhance the therapeutic efficacy of Cp at reduced doses. Nanoparticles were prepared via the nanoprecipitation method, loaded with Cp, and coated with positively charged chitosan (CS) for enhanced cell interaction, yielding Cp@CS/BME NPs with an average size of 160.2 ± 4.6 nm and a zeta potential of 12.7 ± 1.5 mV. In vitro release studies revealed a pH-sensitive release profile, with higher release rates at pH 5.4 than at pH 7.4, highlighting the potential for targeted drug delivery in acidic tumor environments. In vitro studies on HT-29 and Caco-2 colorectal cancer cell lines demonstrated the nanoformulation’s ability to significantly increase Cp uptake and cytotoxic activity. Apoptosis assays further confirmed increased induction of cell death with Cp@CS/BME NPs. Cell-cycle analysis revealed that treatment with Cp@CS/BME NPs led to a significant increase in the sub-G1 phase, indicative of enhanced apoptosis, and a marked decrease in the G1-phase population coupled with an increased G2/M-phase arrest in both cell lines. Further gene expression analysis demonstrated a substantial downregulation of the anti-apoptotic gene Bcl-2 and an upregulation of the pro-apoptotic genes Bax, PUMA, and BID following treatment with Cp@CS/BME NPs. Thus, this study presents a promising and innovative strategy for enhancing the therapeutic efficacy of chemotherapeutic agents using naturally derived ingredients while limiting the side effects.

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From antigen uptake to immune modulation: the multifaceted potential of peptide nanofibers as vaccine nanocarriers

Abstract: Spanning from the mitigation of pathogenic diseases via protective immunity to the provision of therapeutic solutions for other debilitating ailments, immune-based interventions have showcased promising and significant outcomes. Peptide nanofibers...

Cited by 3 publications

References 133 publications

Preparation and Characterization of Tiamulin-Loaded Niosomes for Oral Bioavailability Enhancement in Mycoplasma-Infected Broilers

Preparation and Characterization of Tiamulin-Loaded Niosomes for Oral Bioavailability Enhancement in Mycoplasma-Infected Broilers

Sustainable Nanomedicine: Enhancement of Asplatin’s Cytotoxicity In Vitro and In Vivo Using Green-Synthesized Zinc Oxide Nanoparticles Formed via Microwave-Assisted and Gambogic Acid-Mediated Processes

Synergistic Enhancement of Carboplatin Efficacy through pH-Sensitive Nanoparticles Formulated Using Naturally Derived Boswellia Extract for Colorectal Cancer Therapy

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