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1.
Molecules ; 29(9)2024 Apr 30.
Artigo em Inglês | MEDLINE | ID: mdl-38731568

RESUMO

Cancer is one of the major causes of death, and its negative impact continues to rise globally. Chemotherapy, which is the most common therapy, has several limitations due to its tremendous side effects. Therefore, developing an alternate therapeutic agent with high biocompatibility is indeed needed. The anti-oxidative effects and bioactivities of several different crude extracts of marine algae have been evaluated both in vitro and in vivo. In the present study, we synthesized the aqueous extract (HA) from the marine algae Amphiroa anceps, and then, a liposome was formulated for that extract (NHA). The extracts were characterized using different photophysical tools like dynamic light scattering, UV-visible spectroscopy, FTIR, scanning electron microscopy, and GC-MS analysis. The SEM image revealed a size range of 112-185 nm for NHA and the GC-MS results showed the presence of octadecanoic acid and n-Hexadecanoic acid in the majority. The anticancer activity was studied using A549 cells, and the NHA inhibited the cancer cells dose-dependently, with the highest killing of 92% at 100 µg/mL. The in vivo studies in the zebrafish model showed that neither the HA nor NHA of Amphiroa anceps showed any teratogenic effect. The outcome of our study showed that NHA can be a potential drug candidate for inhibiting cancer with good biocompatibility up to a dose of 100 µg/mL.


Assuntos
Antineoplásicos , Rodófitas , Peixe-Zebra , Rodófitas/química , Humanos , Animais , Antineoplásicos/farmacologia , Antineoplásicos/química , Células A549 , Neoplasias/tratamento farmacológico , Neoplasias/patologia , Extratos Vegetais/química , Extratos Vegetais/farmacologia , Lipossomos/química , Cromatografia Gasosa-Espectrometria de Massas , Nanopartículas/química , Linhagem Celular Tumoral
2.
BMC Oral Health ; 24(1): 551, 2024 May 11.
Artigo em Inglês | MEDLINE | ID: mdl-38734599

RESUMO

BACKGROUND: Periodontal diseases may benefit more from topical treatments with nanoparticles rather than systemic treatments due to advantages such as higher stability and controlled release profile. This study investigated the preparation and characterization of thermosensitive gel formulations containing clindamycin-loaded niosomes and solid lipid nanoparticles (SLNs) loaded with fluconazole (FLZ), as well as their in vitro antibacterial and antifungal effects in the treatment of common microorganisms that cause periodontal diseases. METHODS: This study loaded niosomes and SLNs with clindamycin and FLZ, respectively, and assessed their loading efficiency, particle size, and zeta potential. The particles were characterized using a variety of methods such as differential scanning calorimetry (DSC), dynamic light scattering (DLS), and Transmission Electron Microscopy (TEM). Thermosensitive gels were formulated by combining these particles and their viscosity, gelation temperature, in-vitro release profile, as well as antibacterial and antifungal effects were evaluated. RESULTS: Both types of these nanoparticles were found to be spherical (TEM) with a mean particle size of 243.03 nm in niosomes and 171.97 nm in SLNs (DLS), and respective zeta potentials of -23.3 and -15. The loading rate was 98% in niosomes and 51% in SLNs. The release profiles of niosomal formulations were slower than those of the SLNs. Both formulations allowed the release of the drug by first-order kinetic. Additionally, the gel formulation presented a slower release of both drugs compared to niosomes and SLNs suspensions. CONCLUSION: Thermosensitive gels containing clindamycin-loaded niosomes and/or FLZ-SLNs were found to effectively fight the periodontitis-causing bacteria and fungi.


Assuntos
Clindamicina , Fluconazol , Géis , Lipossomos , Nanopartículas , Tamanho da Partícula , Doenças Periodontais , Clindamicina/administração & dosagem , Clindamicina/uso terapêutico , Nanopartículas/química , Fluconazol/administração & dosagem , Fluconazol/farmacologia , Doenças Periodontais/tratamento farmacológico , Antifúngicos/administração & dosagem , Antifúngicos/farmacologia , Antibacterianos/administração & dosagem , Antibacterianos/farmacologia , Microscopia Eletrônica de Transmissão , Temperatura , Varredura Diferencial de Calorimetria , Candida albicans/efeitos dos fármacos , Viscosidade , Lipídeos/química , Humanos
3.
Cell Death Dis ; 15(5): 328, 2024 May 11.
Artigo em Inglês | MEDLINE | ID: mdl-38734740

RESUMO

We created valrubicin-loaded immunoliposomes (Val-ILs) using the antitumor prodrug valrubicin, a hydrophobic analog of daunorubicin. Being lipophilic, valrubicin readily incorporated Val-lLs that were loaded with specific antibodies. Val-ILs injected intravenously rapidly reached the bone marrow and spleen, indicating their potential to effectively target cancer cells in these areas. Following the transplantation of human pediatric B-cell acute lymphoblastic leukemia (B-ALL), T-cell acute lymphoblastic leukemia (T-ALL), or acute myeloid leukemia (AML) in immunodeficient NSG mice, we generated patient-derived xenograft (PDX) models, which were treated with Val-ILs loaded with antibodies to target CD19, CD7 or CD33. Only a small amount of valrubicin incorporated into Val-ILs was needed to induce leukemia cell death in vivo, suggesting that this approach could be used to efficiently treat acute leukemia cells. We also demonstrated that Val-ILs could reduce the risk of contamination of CD34+ hematopoietic stem cells by acute leukemia cells during autologous peripheral blood stem cell transplantation, which is a significant advantage for clinical applications. Using EL4 lymphoma cells on immunocompetent C57BL/6 mice, we also highlighted the potential of Val-ILs to target immunosuppressive cell populations in the spleen, which could be valuable in impairing cancer cell expansion, particularly in lymphoma cases. The most efficient Val-ILs were found to be those loaded with CD11b or CD223 antibodies, which, respectively, target the myeloid-derived suppressor cells (MDSC) or the lymphocyte-activation gene 3 (LAG-3 or CD223) on T4 lymphocytes. This study provides a promising preclinical demonstration of the effectiveness and ease of preparation of Val-ILs as a novel nanoparticle technology. In the context of hematological cancers, Val-ILs have the potential to be used as a precise and effective therapy based on targeted vesicle-mediated cell death.


Assuntos
Lipossomos , Animais , Humanos , Camundongos , Ensaios Antitumorais Modelo de Xenoenxerto , Morte Celular/efeitos dos fármacos , Neoplasias Hematológicas/tratamento farmacológico , Neoplasias Hematológicas/patologia , Neoplasias Hematológicas/terapia , Leucemia Mieloide Aguda/tratamento farmacológico , Leucemia Mieloide Aguda/patologia , Leucemia Mieloide Aguda/imunologia , Linhagem Celular Tumoral , Leucemia-Linfoma Linfoblástico de Células T Precursoras/tratamento farmacológico , Leucemia-Linfoma Linfoblástico de Células T Precursoras/patologia
4.
Int J Nanomedicine ; 19: 4121-4136, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38736655

RESUMO

Purpose: This study aims to broaden the application of nano-contrast agents (NCAs) within the realm of the musculoskeletal system. It aims to introduce novel methods, strategies, and insights for the clinical management of ischemic muscle disorders, encompassing diagnosis, monitoring, evaluation, and therapeutic intervention. Methods: We developed a composite encapsulation technique employing O-carboxymethyl chitosan (OCMC) and liposome to encapsulate NCA-containing gold nanorods (GNRs) and perfluoropentane (PFP). This nanoscale contrast agent was thoroughly characterized for its basic physicochemical properties and performance. Its capabilities for in vivo and in vitro ultrasound imaging and photothermal imaging were authenticated, alongside a comprehensive biocompatibility assessment to ascertain its effects on microcirculatory perfusion in skeletal muscle using a murine model of hindlimb ischemia, and its potential to augment blood flow and facilitate recovery. Results: The engineered GNR@OCMC-liposome/PFP nanostructure exhibited an average size of 203.18±1.49 nm, characterized by size uniformity, regular morphology, and a good biocompatibility profile. In vitro assessments revealed NCA's potent photothermal response and its transformation into microbubbles (MBs) under near-infrared (NIR) irradiation, thereby enhancing ultrasonographic visibility. Animal studies demonstrated the nanostructure's efficacy in photothermal imaging at ischemic loci in mouse hindlimbs, where NIR irradiation induced rapid temperature increases and significantly increased blood circulation. Conclusion: The dual-modal ultrasound/photothermal NCA, encapsulating GNR and PFP within a composite shell-core architecture, was synthesized successfully. It demonstrated exceptional stability, biocompatibility, and phase transition efficiency. Importantly, it facilitates the encapsulation of PFP, enabling both enhanced ultrasound imaging and photothermal imaging following NIR light exposure. This advancement provides a critical step towards the integrated diagnosis and treatment of ischemic muscle diseases, signifying a pivotal development in nanomedicine for musculoskeletal therapeutics.


Assuntos
Meios de Contraste , Ouro , Isquemia , Músculo Esquelético , Nanotubos , Ultrassonografia , Animais , Ouro/química , Nanotubos/química , Meios de Contraste/química , Meios de Contraste/farmacologia , Camundongos , Isquemia/diagnóstico por imagem , Isquemia/terapia , Músculo Esquelético/diagnóstico por imagem , Ultrassonografia/métodos , Membro Posterior/irrigação sanguínea , Fluorocarbonos/química , Fluorocarbonos/farmacologia , Lipossomos/química , Quitosana/química , Quitosana/farmacologia , Doenças Musculares/diagnóstico por imagem , Doenças Musculares/terapia , Terapia Fototérmica/métodos , Modelos Animais de Doenças , Humanos , Pentanos
5.
Front Immunol ; 15: 1384417, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38726013

RESUMO

Nipah virus (NiV) poses a significant threat to human and livestock populations across South and Southeast Asia. Vaccines are required to reduce the risk and impact of spillover infection events. Pigs can act as an intermediate amplifying host for NiV and, separately, provide a preclinical model for evaluating human vaccine candidate immunogenicity. The aim of this study was therefore to evaluate the immunogenicity of an mRNA vectored NiV vaccine candidate in pigs. Pigs were immunized twice with 100 µg nucleoside-modified mRNA vaccine encoding soluble G glycoprotein from the Malaysia strain of NiV, formulated in lipid nanoparticles. Potent antigen-binding and virus neutralizing antibodies were detected in serum following the booster immunization. Antibody responses effectively neutralized both the Malaysia and Bangladesh strains of NiV but showed limited neutralization of the related (about 80% amino acid sequence identity for G) Hendra virus. Antibodies were also capable of neutralizing NiV glycoprotein mediated cell-cell fusion. NiV G-specific T cell cytokine responses were also measurable following the booster immunization with evidence for induction of both CD4 and CD8 T cell responses. These data support the further evaluation of mRNA vectored NiV G as a vaccine for both pigs and humans.


Assuntos
Anticorpos Neutralizantes , Anticorpos Antivirais , Infecções por Henipavirus , Vírus Nipah , Vacinas Virais , Animais , Vírus Nipah/imunologia , Vírus Nipah/genética , Suínos , Infecções por Henipavirus/prevenção & controle , Infecções por Henipavirus/imunologia , Anticorpos Neutralizantes/imunologia , Anticorpos Neutralizantes/sangue , Vacinas Virais/imunologia , Vacinas Virais/administração & dosagem , Anticorpos Antivirais/sangue , Anticorpos Antivirais/imunologia , Doenças dos Suínos/imunologia , Doenças dos Suínos/prevenção & controle , Doenças dos Suínos/virologia , RNA Mensageiro/genética , RNA Mensageiro/imunologia , Imunogenicidade da Vacina , Imunização Secundária , Citocinas/imunologia , Vacinas Sintéticas/imunologia , Lipossomos , Nanopartículas
7.
J Am Chem Soc ; 146(19): 12925-12932, 2024 May 15.
Artigo em Inglês | MEDLINE | ID: mdl-38691507

RESUMO

Technological breakthroughs in cryo-electron microscopy (cryo-EM) methods open new perspectives for highly detailed structural characterizations of extracellular vesicles (EVs) and synthetic liposome-protein assemblies. Structural characterizations of these vesicles in solution under a nearly native hydrated state are of great importance to decipher cell-to-cell communication and to improve EVs' application as markers in diagnosis and as drug carriers in disease therapy. However, difficulties in preparing holey carbon cryo-EM grids with low vesicle heterogeneities, at low concentration and with kinetic control of the chemical reactions or assembly processes, have limited cryo-EM use in the EV study. We report a straightforward membrane vesicle cryo-EM sample preparation method that assists in circumventing these limitations by using a free-standing DNA-affinity superlattice for covering holey carbon cryo-EM grids. Our approach uses DNA origami to self-assemble to a solution-stable and micrometer-sized ordered molecular template in which structure and functional properties can be rationally controlled. We engineered the template with cholesterol-binding sites to specifically trap membrane vesicles. The advantages of this DNA-cholesterol-affinity lattice (DCAL) include (1) local enrichment of artificial and biological vesicles at low concentration and (2) isolation of heterogeneous cell-derived membrane vesicles (exosomes) from a prepurified pellet of cell culture conditioned medium on the grid.


Assuntos
Microscopia Crioeletrônica , DNA , Microscopia Crioeletrônica/métodos , DNA/química , Vesículas Extracelulares/química , Humanos , Colesterol/química , Lipossomos/química
8.
Ann Transplant ; 29: e942823, 2024 May 14.
Artigo em Inglês | MEDLINE | ID: mdl-38741362

RESUMO

BACKGROUND The association between forced expiratory volume in 1 second (FEV1) trajectory and mortality in bronchiolitis obliterans syndrome (BOS) is not well defined. Using long-term data from a prior clinical trial of inhaled liposomal cyclosporine A (L-CsA-I) for lung transplant patients with BOS, this study examined the association between longitudinal FEV1 change and mortality. MATERIAL AND METHODS We analyzed long-term data from a clinical trial which randomized 21 patients with BOS (³20% decrease in FEV1 from personal maximum) to receive L-CsA-I plus standard-of-care (n=11) or standard-of-care (SOC) alone (n=10) for 24 weeks. A joint statistical model, combining a linear mixed model for FEV1 change and Cox regression for mortality, was utilized to examine the overall association between FEV1 trajectory and mortality during follow-up. RESULTS The 21 trial participants (10 single, 11 double lung recipients) had a mean FEV1 of 1.7±0.6 Liters at randomization. Median follow-up post-randomization was 35 months. In joint model analysis, 1 percent FEV1 decline predicted 1.076-fold increased mortality risk (95% confidence interval: -0.998 to 1.160, p=0.058). FEV1 decline was reduced by 2.6% per year in L-CsA-I patients compared to SOC (p=0.210), and overall survival at 1/3/5 years was 91%/64%/27% vs 90%/20%/0% for L-CsA-I versus SOC, respectively (p=0.164). CONCLUSIONS In BOS patients, greater longitudinal FEV1 decline predicts increased mortality. Trends towards prolonged stabilization of FEV1 and improved survival were observed with L-CsA-I receipt. Further analyses will aid in evaluating the utility of FEV1 change as a survival predictor, having implications in BOS management and future trial design.


Assuntos
Bronquiolite Obliterante , Ciclosporina , Transplante de Pulmão , Humanos , Bronquiolite Obliterante/tratamento farmacológico , Bronquiolite Obliterante/mortalidade , Bronquiolite Obliterante/etiologia , Bronquiolite Obliterante/fisiopatologia , Masculino , Feminino , Volume Expiratório Forçado , Pessoa de Meia-Idade , Ciclosporina/administração & dosagem , Ciclosporina/uso terapêutico , Administração por Inalação , Seguimentos , Adulto , Projetos Piloto , Imunossupressores/administração & dosagem , Imunossupressores/uso terapêutico , Lipossomos , Padrão de Cuidado , Resultado do Tratamento , Síndrome de Bronquiolite Obliterante
9.
Pak J Pharm Sci ; 37(1): 139-145, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-38741410

RESUMO

Liposomes, a nanoscale carrier, plays an important role in the delivery of drug, affects the in vivo efficacy of drugs. In this paper, silymarin(SM)-loaded liposomes was optimized using the response surface method (RSM), with entrapment efficiency (EE%) as an index. The formulation was optimized as follow: lecithin (7.8mg/mL), SM/lecithin (1/26) and lecithin/cholesterol (10/1). The optimized SM liposomes had a high EE (96.58 ±3.06%), with a particle size of 290.3 ±10.5nm and a zeta potential of +22.98 ±1.73mV. In vitro release tests revealed that SM was released in a sustained-release manner, primarily via diffusion mechanism. In vitro cytotoxicity studies demonstrated that the prepared SM liposomes had stronger inhibitory effects than the model drug. Overall, these results indicate that this liposome system is suitable for intravenous delivery to enhance the antitumor effects of SM.


Assuntos
Lecitinas , Lipossomos , Tamanho da Partícula , Silimarina , Silimarina/farmacologia , Silimarina/química , Silimarina/administração & dosagem , Humanos , Lecitinas/química , Antineoplásicos/farmacologia , Antineoplásicos/química , Antineoplásicos/administração & dosagem , Liberação Controlada de Fármacos , Linhagem Celular Tumoral , Sobrevivência Celular/efeitos dos fármacos , Colesterol/química , Química Farmacêutica , Composição de Medicamentos
10.
ACS Appl Mater Interfaces ; 16(19): 24295-24307, 2024 May 15.
Artigo em Inglês | MEDLINE | ID: mdl-38697643

RESUMO

Pyroptosis has garnered increasing attention because of its ability to trigger robust antitumor immunity. Pyroptosis is initiated by the activation of inflammasomes, which are regulated by various organelles. The collaboration among organelles offers several protective mechanisms to prevent activation of the inflammasome, thereby limiting the induction of efficient pyroptosis. Herein, a multiorganelle homeostasis disruptor (denoted BLL) is constructed by encapsulating liposomes and bortezomib (BTZ) within a layered double hydroxide (LDH) nanocage to continuously activate inflammasomes for inducing efficient pyroptosis. In lysosomes, the negatively charged liposomes are released to recruit the NLRP3 inflammasomes through electrostatic interactions. ER stress is induced by BTZ to enhance the activation of the NLRP3 inflammasome. Meanwhile, the BLL nanocage exhibited H+-scavenging ability due to the weak alkalinity of LDH, thus disrupting the homeostasis of the lysosome and alleviating the degradation of the NLRP3 inflammasome by lysosomal-associated autophagy. Our results suggest that the BLL nanocage induces homeostatic imbalance in various organelles and efficient pyroptosis. We hope this work can provide new insights into the design of an efficient pyroptosis inducer by disrupting the homeostatic balance of multiple organelles and promote the development of novel antineoplastic platforms.


Assuntos
Homeostase , Inflamassomos , Proteína 3 que Contém Domínio de Pirina da Família NLR , Piroptose , Piroptose/efeitos dos fármacos , Inflamassomos/metabolismo , Inflamassomos/efeitos dos fármacos , Homeostase/efeitos dos fármacos , Proteína 3 que Contém Domínio de Pirina da Família NLR/metabolismo , Humanos , Camundongos , Bortezomib/farmacologia , Bortezomib/química , Lipossomos/química , Animais , Lisossomos/metabolismo , Lisossomos/efeitos dos fármacos , Hidróxidos/química , Hidróxidos/farmacologia , Nanoestruturas/química , Nanopartículas/química
11.
Pak J Pharm Sci ; 37(2): 399-404, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38767107

RESUMO

Hair loss (alopecia) continues to be an issue for both sexes. There are multiple ways to reduce the effects of alopecia, one of which is topical minoxidil (MXD). This study aimed to test the effects of minoxidil nanoliposomes (MXD-NLs) on the hair of mice, compared with free MXD and to examine the disinfectant ability of MXD-NLs toward scalp bacteria. To test the study hypothesis, MXD-NLs and free MXD were prepared. Mouse hair was shaved prior to the experiment. MXD-NLs, free MXD and their vehicles were applied for 15 days. In addition, dermal swabs were used to isolate scalp bacteria and test the inhibitory effect of pretreated media with the two formulations and their vehicles. The results revealed that hair growth in the MXD-NLs -treated group (0.65±0.1cm) was higher than that in the free MXD -treated group (0.53±0.2cm). In addition, MXD-NLs treated media reduced the number of scalp bacteria (p=0.0456) compared with free MXD. These results reveal a novel formulation of MXD with faster hair growth properties and a better disinfectant effect than free MXD. This study can help future researchers to expand and develop MXD-NLs.


Assuntos
Alopecia , Cabelo , Lipossomos , Minoxidil , Couro Cabeludo , Minoxidil/farmacologia , Animais , Cabelo/crescimento & desenvolvimento , Cabelo/efeitos dos fármacos , Cabelo/microbiologia , Couro Cabeludo/efeitos dos fármacos , Camundongos , Alopecia/tratamento farmacológico , Alopecia/microbiologia , Nanopartículas , Desinfetantes/farmacologia , Masculino , Feminino
12.
Nat Commun ; 15(1): 4267, 2024 May 20.
Artigo em Inglês | MEDLINE | ID: mdl-38769317

RESUMO

The membrane-fusion-based internalization without lysosomal entrapment is advantageous for intracellular delivery over endocytosis. However, protein corona formed on the membrane-fusogenic liposome surface converts its membrane-fusion performance to lysosome-dependent endocytosis, causing poorer delivery efficiency in biological conditions. Herein, we develop an antifouling membrane-fusogenic liposome for effective intracellular delivery in vivo. Leveraging specific lipid composition at an optimized ratio, such antifouling membrane-fusogenic liposome facilitates fusion capacity even in protein-rich conditions, attributed to the copious zwitterionic phosphorylcholine groups for protein-adsorption resistance. Consequently, the antifouling membrane-fusogenic liposome demonstrates robust membrane-fusion-mediated delivery in the medium with up to 38% fetal bovine serum, outclassing two traditional membrane-fusogenic liposomes effective at 4% and 6% concentrations. When injected into mice, antifouling membrane-fusogenic liposomes can keep their membrane-fusion-transportation behaviors, thereby achieving efficient luciferase transfection and enhancing gene-editing-mediated viral inhibition. This study provides a promising tool for effective intracellular delivery under complex physiological environments, enlightening future nanomedicine design.


Assuntos
Lipossomos , Fusão de Membrana , Lipossomos/metabolismo , Animais , Camundongos , Humanos , Endocitose , Transfecção , Edição de Genes/métodos , Coroa de Proteína/metabolismo , Coroa de Proteína/química , Incrustação Biológica/prevenção & controle , Feminino , Lipídeos/química
13.
Proc Natl Acad Sci U S A ; 121(22): e2322935121, 2024 May 28.
Artigo em Inglês | MEDLINE | ID: mdl-38771877

RESUMO

Current treatment options for diabetic wounds face challenges due to low efficacy, as well as potential side effects and the necessity for repetitive treatments. To address these issues, we report a formulation utilizing trisulfide-derived lipid nanoparticle (TS LNP)-mRNA therapy to accelerate diabetic wound healing by repairing and reprogramming the microenvironment of the wounds. A library of reactive oxygen species (ROS)-responsive TS LNPs was designed and developed to encapsulate interleukin-4 (IL4) mRNA. TS2-IL4 LNP-mRNA effectively scavenges excess ROS at the wound site and induces the expression of IL4 in macrophages, promoting the polarization from the proinflammatory M1 to the anti-inflammatory M2 phenotype at the wound site. In a diabetic wound model of db/db mice, treatment with this formulation significantly accelerates wound healing by enhancing the formation of an intact epidermis, angiogenesis, and myofibroblasts. Overall, this TS LNP-mRNA platform not only provides a safe, effective, and convenient therapeutic strategy for diabetic wound healing but also holds great potential for clinical translation in both acute and chronic wound care.


Assuntos
Nanopartículas , RNA Mensageiro , Espécies Reativas de Oxigênio , Cicatrização , Cicatrização/efeitos dos fármacos , Animais , Nanopartículas/química , Camundongos , RNA Mensageiro/genética , RNA Mensageiro/metabolismo , Espécies Reativas de Oxigênio/metabolismo , Macrófagos/metabolismo , Macrófagos/efeitos dos fármacos , Interleucina-4/metabolismo , Diabetes Mellitus Experimental , Humanos , Lipídeos/química , Modelos Animais de Doenças , Masculino , Lipossomos
14.
Int J Mol Sci ; 25(9)2024 Apr 30.
Artigo em Inglês | MEDLINE | ID: mdl-38732135

RESUMO

Glioblastoma (GBM) is the most lethal and common malignant primary brain tumor in adults. An important feature that supports GBM aggressiveness is the unique composition of its extracellular matrix (ECM). Particularly, fibronectin plays an important role in cancer cell adhesion, differentiation, proliferation, and chemoresistance. Thus, herein, a hydrogel with mechanical properties compatible with the brain and the ability to disrupt the dynamic and reciprocal interaction between fibronectin and tumor cells was produced. High-molecular-weight hyaluronic acid (HMW-HA) functionalized with the inhibitory fibronectin peptide Arg-Gly-Asp-Ser (RGDS) was used to produce the polymeric matrix. Liposomes encapsulating doxorubicin (DOX) were also included in the hydrogel to kill GBM cells. The resulting hydrogel containing liposomes with therapeutic DOX concentrations presented rheological properties like a healthy brain. In vitro assays demonstrated that unmodified HMW-HA hydrogels only caused GBM cell killing after DOX incorporation. Conversely, RGDS-functionalized hydrogels displayed per se cytotoxicity. As GBM cells produce several proteolytic enzymes capable of disrupting the peptide-HA bond, we selected MMP-2 to illustrate this phenomenon. Therefore, RGDS internalization can induce GBM cell apoptosis. Importantly, RGDS-functionalized hydrogel incorporating DOX efficiently damaged GBM cells without affecting astrocyte viability, proving its safety. Overall, the results demonstrate the potential of the RGDS-functionalized hydrogel to develop safe and effective GBM treatments.


Assuntos
Doxorrubicina , Fibronectinas , Glioblastoma , Ácido Hialurônico , Hidrogéis , Oligopeptídeos , Glioblastoma/tratamento farmacológico , Glioblastoma/metabolismo , Glioblastoma/patologia , Humanos , Doxorrubicina/farmacologia , Doxorrubicina/química , Oligopeptídeos/química , Oligopeptídeos/farmacologia , Fibronectinas/metabolismo , Fibronectinas/antagonistas & inibidores , Hidrogéis/química , Linhagem Celular Tumoral , Ácido Hialurônico/química , Neoplasias Encefálicas/tratamento farmacológico , Neoplasias Encefálicas/metabolismo , Neoplasias Encefálicas/patologia , Lipossomos/química , Apoptose/efeitos dos fármacos , Metaloproteinase 2 da Matriz/metabolismo
15.
Nutrients ; 16(9)2024 Apr 24.
Artigo em Inglês | MEDLINE | ID: mdl-38732502

RESUMO

INTRODUCTION: Iron deficiency is common in patients with non-dialysis-dependent chronic kidney disease (NDD-CKD). Oral iron supplementation is recommended in these patients, but it is associated with a higher incidence of gastrointestinal adverse reactions. Liposomal iron therapy has been proposed as a new iron formulation, improving iron bioavailability with less side effects; however, few data are available in patients with NDD-CKD. METHODS: We designed a single-arm pilot study to evaluate the efficacy of liposomal iron administered for six months in correcting iron deficiency (defined as serum ferritin < 100 ng/mL and/or transferrin saturation < 20%) in patients with NDD-CKD stages 1-5. The primary endpoints were the achievement of serum ferritin ≥ 100 ng/mL and transferrin saturation ≥ 20%. Secondary outcomes were hemoglobin (Hb) changes and the safety of liposomal iron. RESULTS: The efficacy population included 34/38 patients, who completed at least one visit after baseline. Liposomal iron increased the achievement of transferrin saturation targets from 11.8% at baseline to 50.0% at month 6 (p = 0.002), while no significant correction of serum ferritin (p = 0.214) and Hb was found (p = 0.465). When patients were stratified by anemia (Hb < 12 g/dL in women and Hb < 13 g/dL in men), a significant improvement of transferrin saturation was observed only in anemic patients (from 13.3 ± 5.8% to 20.2 ± 8.1%, p = 0.012). Hb values slightly increased at month 6 only in anemic patients (+0.60 g/dL, 95%CI -0.27 to +1.48), but not in those without anemia (+0.08 g/dL, 95%CI -0.73 to +0.88). In patients taking at least one dose of liposomal iron (safety population, n = 38), the study drug was discontinued in eight patients due to death (n = 2), a switch to intravenous iron (n = 2), and the occurrence of side effects (n = 4). CONCLUSIONS: The use of liposomal iron in patients with NDD-CKD is associated with a partial correction of transferrin saturation, with no significant effect on iron storage and Hb levels.


Assuntos
Anemia Ferropriva , Suplementos Nutricionais , Ferritinas , Hemoglobinas , Ferro , Lipossomos , Insuficiência Renal Crônica , Transferrina , Humanos , Feminino , Masculino , Insuficiência Renal Crônica/complicações , Idoso , Anemia Ferropriva/tratamento farmacológico , Anemia Ferropriva/sangue , Anemia Ferropriva/etiologia , Pessoa de Meia-Idade , Projetos Piloto , Ferro/administração & dosagem , Ferro/sangue , Hemoglobinas/análise , Hemoglobinas/metabolismo , Ferritinas/sangue , Transferrina/metabolismo , Administração Oral , Resultado do Tratamento , Deficiências de Ferro
16.
Commun Biol ; 7(1): 556, 2024 May 10.
Artigo em Inglês | MEDLINE | ID: mdl-38730092

RESUMO

Lipid nanoparticles (LNPs) have emerged as promising platforms for efficient in vivo mRNA delivery owing to advancements in ionizable lipids. However, maintaining the thermostability of mRNA/LNP systems remains challenging. While the importance of only a small amount of lipid impurities on mRNA inactivation is clear, a fundamental solution has not yet been proposed. In this study, we investigate an approach to limit the generation of aldehyde impurities that react with mRNA nucleosides through the chemical engineering of lipids. We demonstrated that piperidine-based lipids improve the long-term storage stability of mRNA/LNPs at refrigeration temperature as a liquid formulation. High-performance liquid chromatography analysis and additional lipid synthesis revealed that amine moieties of ionizable lipids play a vital role in limiting reactive aldehyde generation, mRNA-lipid adduct formation, and loss of mRNA function during mRNA/LNP storage. These findings highlight the importance of lipid design and help enhance the shelf-life of mRNA/LNP systems.


Assuntos
Lipídeos , Nanopartículas , Piperidinas , Estabilidade de RNA , RNA Mensageiro , Nanopartículas/química , RNA Mensageiro/metabolismo , RNA Mensageiro/genética , Lipídeos/química , Piperidinas/química , Humanos , Temperatura , Lipossomos
17.
Hum Vaccin Immunother ; 20(1): 2342592, 2024 Dec 31.
Artigo em Inglês | MEDLINE | ID: mdl-38714327

RESUMO

Messenger ribonucleic acid (mRNA) technology has been rapidly applied for the development of the COVID-19 vaccine. However, naked mRNA itself is inherently unstable. Lipid nanoparticles (LNPs) protect mRNAs from extracellular ribonucleases and facilitate mRNA trafficking. For mRNA vaccines, antigen-presenting cells utilize LNPs through uptake to elicit antigen-specific immunity. There are reports on the impact of various physical characteristics of LNPs, particularly those with sizes less than 200 nm, especially 50 to 150 nm, on the overall stability and protective efficacy of mRNA vaccines. To address this, a single change in the size of LNPs using the same mRNA stock solution was assessed for the physicochemical characterization of the resulting mRNA-LNPs vaccine, along with the evaluation of their protective efficacy. Particles of smaller sizes generally disperse more effectively in solutions, with minimized occurrence of particle precipitation and aggregation. Here, we demonstrate that the vaccine containing 80-100 nm mRNA-LNPs showed the best stability and protection at 4°C and -20°C. Furthermore, we can conclude that freezing the vaccine at -20°C is more appropriate for maintaining stability over the long term. This effort is poised to provide a scientific basis for improving the quality of ongoing mRNA vaccine endeavors and providing information on the development of novel products.


Assuntos
Vacinas contra COVID-19 , COVID-19 , Lipídeos , Nanopartículas , Tamanho da Partícula , SARS-CoV-2 , Vacinas de mRNA , Nanopartículas/química , Vacinas contra COVID-19/imunologia , Vacinas contra COVID-19/administração & dosagem , COVID-19/prevenção & controle , COVID-19/imunologia , Lipídeos/química , SARS-CoV-2/imunologia , SARS-CoV-2/genética , Animais , Camundongos , Anticorpos Antivirais/imunologia , Feminino , RNA Mensageiro/imunologia , RNA Mensageiro/genética , Estabilidade de Medicamentos , Imunogenicidade da Vacina , Humanos , Camundongos Endogâmicos BALB C , Vacinas Sintéticas/imunologia , Vacinas Sintéticas/administração & dosagem , Lipossomos
18.
PLoS One ; 19(5): e0302264, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38723038

RESUMO

CRISPR/Cas9 is a recently discovered genomic editing technique that altered scientist's sight in studying genes function. Cas9 is controlled via guide (g) RNAs, which match the DNA targeted in cleavage to modify the respective gene. The development in prostate cancer (PC) modeling directed not only to novel resources for recognizing the signaling pathways overriding prostate cell carcinoma, but it has also created a vast reservoir for complementary tools to examine therapies counteracting this type of cancer. Various cultured somatic rat models for prostate cancer have been developed that nearly mimic human prostate cancer. Nano-medicine can passively target cancer cells via increasing bioavailability and conjugation via specific legend, contributing to reduced systemic side-effects and increased efficacy. This article highlights liposomal loaded Nano-medicine as a potential treatment for prostate cancer and clarifies the CRISPR/Cas9 variation accompanied with prostate cancer. PC is induced experimentally in western rat model via ethinyl estradiol for 4 weeks and SC. dose of 3, 2'- dimethyl-4-aminobiphenyl estradiol (DAE) (50mg/kg) followed by treatment via targeted liposomal-coated compounds such as liposomal dexamethasone (DXM), liposomal doxorubicin (DOX) and liposomal Turmeric (TUR) (3mg/kg IP) for four weeks in a comparative study to their non-targeted analogue dexamethasone, doxorubicin and Turmeric. 3, 2'- dimethyl-4-aminobiphenylestradiol elicit prostate cancer in western rats within 5 months. Simultaneous supplementations with these liposomal compounds influence on prostate cancer; tumor markers were investigated via prostate-specific antigen (PSA), Nitric oxide (NOX) and CRISPR/Cas9 gene editing. Several long non-coding RNAs were reported to be deregulated in prostate cell carcinoma, including MALAT1. On the other hand, gene expression of apoptotic biomarkers focal adhesion kinase (AKT-1), phosphatidylinistol kinase (PI3K) and glycogen synthase kinase-3 (GSK-3) was also investigated and further confirming these results via histopathological examination. Liposomal loaded dexamethasone; doxorubicin and Turmeric can be considered as promising therapeutic agents for prostate cancer via modulating CRISPR/Cas9 gene editing and long non coding gene MALAT1.


Assuntos
Sistemas CRISPR-Cas , Lipossomos , Neoplasias da Próstata , RNA Longo não Codificante , Masculino , Neoplasias da Próstata/genética , Neoplasias da Próstata/tratamento farmacológico , Neoplasias da Próstata/patologia , Neoplasias da Próstata/diagnóstico , Animais , Ratos , RNA Longo não Codificante/genética , Sistemas CRISPR-Cas/genética , Humanos , Edição de Genes/métodos
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