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1.
Proc Natl Acad Sci U S A ; 119(34): e2208060119, 2022 08 23.
Artículo en Inglés | MEDLINE | ID: mdl-35972962

RESUMEN

As nitric oxide (NO) plays significant roles in a variety of physiological processes, the capability for real-time and accurate detection of NO in live organisms is in great demand. Traditional assessments of NO rely on indirect colorimetric techniques or electrochemical sensors that often comprise rigid constituent materials and can hardly satisfy sensitivity and spatial resolution simultaneously. Here, we report a flexible and highly sensitive biosensor based on organic electrochemical transistors (OECTs) capable of continuous and wireless detection of NO in biological systems. By modifying the geometry of the active channel and the gate electrodes of OECTs, devices achieve optimum signal amplification of NO. The sensor exhibits a low response limit, a wide linear range, high sensitivity, and excellent selectivity, with a miniaturized active sensing region compared with a conventional electrochemical sensor. The device demonstrates continuous detection of the nanomolar range of NO in cultured cells for hours without significant signal drift. Real-time and wireless measurement of NO is accomplished for 8 d in the articular cavity of New Zealand White rabbits with anterior cruciate ligament (ACL) rupture injuries. The observed high level of NO is associated with the onset of osteoarthritis (OA) at the later stage. The proposed device platform could provide critical information for the early diagnosis of chronic diseases and timely medical intervention to optimize therapeutic efficacy.


Asunto(s)
Técnicas Biosensibles , Óxido Nítrico , Osteoartritis , Tecnología Inalámbrica , Animales , Técnicas Biosensibles/métodos , Enfermedad Crónica , Diagnóstico Precoz , Técnicas Electroquímicas/métodos , Electrodos , Óxido Nítrico/análisis , Osteoartritis/diagnóstico , Conejos
2.
Small ; 19(22): e2300751, 2023 06.
Artículo en Inglés | MEDLINE | ID: mdl-36828793

RESUMEN

Nanoheterostructures with exquisite interface and heterostructure design find numerous applications in catalysis, plasmonics, electronics, and biomedicine. In the current study, series core-shell metal or metal oxide-based heterogeneous nanocomposite have been successfully fabricated by employing sandwiched liquid metal (LM) layer (i.e., LM oxide/LM/LM oxide) as interfacial galvanic replacement reaction environment. A self-limiting thin oxide layer, which would naturally occur at the metal-air interface under ambient conditions, could be readily delaminated onto the surface of core metal (Fe, Bi, carbonyl iron, Zn, Mo) or metal oxide (Fe3 O4 , Fe2 O3 , MoO3 , ZrO2 , TiO2 ) nano- or micro-particles by van der Waals (vdW) exfoliation. Further on, the sandwiched LM layer could be formed immediately and acted as the reaction site of galvanic replacement where metals (Au, Ag, and Cu) or metal oxide (MnO2 ) with higher reduction potential could be deposited as shell structure. Such strategy provides facile and versatile approaches to design and fabricate nanoheterostructures. As a model, nanocomposite of Fe@Sandwiched-GaIn-Au (Fe@SW-GaIn-Au) is constructed and their application in targeted magnetic resonance imaging (MRI) guided photothermal tumor ablation and chemodynamic therapy (CDT), as well as the enhanced radiotherapy (RT) against tumors, have been systematically investigated.


Asunto(s)
Neoplasias , Medicina de Precisión , Humanos , Compuestos de Manganeso , Óxidos , Metales/química , Neoplasias/diagnóstico por imagen , Neoplasias/terapia , Neoplasias/patología
3.
Small ; 15(16): e1900511, 2019 04.
Artículo en Inglés | MEDLINE | ID: mdl-30913375

RESUMEN

Transformable liquid metal (LM)-based materials have attracted considerable research interest in biomedicine. However, the potential biomedical applications of LMs have not yet been fully explored. Herein, for the first trial, the inductive heating property of gallium-indium eutectic alloy (EGaIn) under alterative magnetic field is systematically investigated. By virtue of its inherent metallic nature, LM possesses excellent magnetic heating property as compared to the conventional magnetite nanoparticles, therefore enabling its unique application as non-magnetic agents in magnetic hyperthermia. Moreover, the extremely high surface tension of LM could be dramatically lowered by a rather facile PEGylation approach, making LM an ideal carrier for other theranostic cargos. By incorporating doxorubicin (DOX)-loaded mesoporous silica (DOX-MS) within PEGylated LM, a magnetic field-driven transformable LM hybrid platform capable of pH/AFM dual stimuli-responsive drug release and magnetic thermochemotherapy are successfully fabricated. The potential application for breast cancer treatment is demonstrated. Furthermore, the large X-ray attenuation ability of LM endows the hybrid with the promising ability for CT imaging. This work explores a new biomedical use of LM and a promising cancer treatment protocol based on LM hybrid for magnetic hyperthermia combined with dual stimuli-responsive chemotherapy and CT imaging.


Asunto(s)
Doxorrubicina/administración & dosificación , Sistemas de Liberación de Medicamentos/métodos , Hipertermia Inducida/métodos , Campos Magnéticos , Nanomedicina Teranóstica/métodos , Animales , Materiales Biocompatibles , Liberación de Fármacos , Femenino , Humanos , Células MCF-7 , Magnetismo , Nanopartículas de Magnetita , Metales/química , Ratones , Dióxido de Silicio/química
4.
ACS Appl Mater Interfaces ; 16(15): 18411-18421, 2024 Apr 17.
Artículo en Inglés | MEDLINE | ID: mdl-38584383

RESUMEN

Cell necroptosis has presented great potential, acting as an effective approach against tumor apoptotic resistance, and it could be further enhanced via accompanying reactive oxygen species (ROS) overexpression. However, whether overproduced ROS assists the necroptotic pathway remains unclear. Thus, iron-palladium nanozyme (FePd NZ)- and shikonin (SKN)-encapsulated functional lipid nanoparticles (FPS-LNPs) were designed to investigate the ROS overexpression-enhanced SKN-induced necroptosis. In this system, SKN acts as an effective necroptosis inducer for cancer cells, and FePd NZ, a sensitive Fenton reaction catalyst, produces extra-intracellular ROS to reinforce the necroptotic pathway. Both in vitro and in vivo antitumor evaluation revealed that FPS-LNPs presented the best tumor growth inhibition efficacy compared with FP-LNPs or SKN-LNPs alone. Meanwhile, induced necroptosis by FPS-LNPs can further trigger the release of damage-associated molecular patterns (DAMPs) and antigens from dying tumor cells to activate the innate immune response. Taking biosafety into consideration, this study has provided a potential nanoplatform for cancer nanotherapy via inducing necroptosis to avoid apoptosis resistance and activate CD8+ T cell immune response.


Asunto(s)
Liposomas , Nanopartículas , Naftoquinonas , Necroptosis , Neoplasias , Especies Reactivas de Oxígeno/metabolismo , Línea Celular Tumoral , Apoptosis
5.
ACS Nano ; 18(9): 6975-6989, 2024 Mar 05.
Artículo en Inglés | MEDLINE | ID: mdl-38377439

RESUMEN

Regarded as one of the hallmarks of tumorigenesis and tumor progression, the evasion of apoptotic cell death would also account for treatment resistance or failure during cancer therapy. In this study, a Ca2+/Cu2+ dual-ion "nano trap" to effectively avoid cell apoptosis evasion by synchronously inducing paraptosis together with apoptosis was successfully designed and fabricated for breast cancer treatment. In brief, disulfiram (DSF)-loaded amorphous calcium carbonate nanoparticles (NPs) were fabricated via a gas diffusion method. Further on, the Cu2+-tannic acid metal phenolic network was embedded onto the NPs surface by self-assembling, followed by mDSPE-PEG/lipid capping to form the DSF-loaded Ca2+/Cu2+ dual-ions "nano trap". The as-prepared nanotrap would undergo acid-triggered biodegradation upon being endocytosed by tumor cells within the lysosome for Ca2+, Cu2+, and DSF releasing simultaneously. The released Ca2+ could cause mitochondrial calcium overload and lead to hydrogen peroxide (H2O2) overexpression. Meanwhile, Ca2+/reactive oxygen species-associated mitochondrial dysfunction would lead to paraptosis cell death. Most importantly, cell paraptosis could be further induced and strengthened by the toxic dithiocarbamate (DTC)-copper complexes formed by the Cu2+ combined with the DTC, the metabolic products of DSF. Additionally, the released Cu2+ will be reduced by intracellular glutathione to generate Cu+, which can catalyze the H2O2 to produce a toxic hydroxyl radical by a Cu+-mediated Fenton-like reaction for inducing cell apoptosis. Both in vitro cellular assays and in vivo antitumor evaluations confirmed the cancer therapeutic efficiency by the dual ion nano trap. This study can broaden the cognition scope of dual-ion-mediated paraptosis together with apoptosis via a multifunctional nanoplatform.


Asunto(s)
Neoplasias de la Mama , Disulfiram , Polifenoles , Humanos , Femenino , Disulfiram/farmacología , Cobre/farmacología , Neoplasias de la Mama/tratamiento farmacológico , Neoplasias de la Mama/patología , Peróxido de Hidrógeno/metabolismo , Paraptosis , Línea Celular Tumoral , Apoptosis
6.
J Control Release ; 370: 879-890, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38782060

RESUMEN

Broad cellular components-initiated efficient chemical reactions that occur in malignant cells may contribute to exploring emerging strategies for cancer treatment. Herein, an ozonated oleogel (OG(O)) was developed to achieve cancer ozone therapy (O3-T) based on intracellular Criegee's reaction. By integrating the chemo-drug, the ozone-loaded oleogel (Dox@OG(O)) was prepared as a chemotherapeutic agent for local O3-T, associated with chemotherapy (CT)/radiotherapy (RT)/immunotherapy and wound healing. The in vitro results showed that, Dox@OG(O) could achieve high ozone loading efficiency and ensure its stability. This Oleogel-mediated O3-T could directly destroy tumor cells via intracellular Criegee's reaction occurred on cell membranes, as well as the effects of tumor microenvironment (TME) regulation by the generation of oxygen/reactive oxygen species (ROS) and depletion of glutathione (GSH). Meanwhile, under the stimulation of X-ray, an accelerated free radical's production was observed, further combined with the radio-sensitivity after TME regulation, an effective anti-tumor effect would be achieved. Further on, in vivo results demonstrated that the locally implanted Dox@OG(O) could effectively inhibit the growth of both primary and secondary tumors. Considering these results above, it will serve as inspiration for future studies investigating of O3-T, especially for postoperative skin diseases.


Asunto(s)
Doxorrubicina , Neoplasias , Compuestos Orgánicos , Ozono , Microambiente Tumoral , Ozono/química , Animales , Humanos , Doxorrubicina/administración & dosificación , Doxorrubicina/farmacología , Microambiente Tumoral/efectos de los fármacos , Neoplasias/tratamiento farmacológico , Neoplasias/terapia , Compuestos Orgánicos/química , Compuestos Orgánicos/farmacología , Compuestos Orgánicos/administración & dosificación , Ratones Endogámicos BALB C , Línea Celular Tumoral , Especies Reactivas de Oxígeno/metabolismo , Ratones Desnudos , Antineoplásicos/administración & dosificación , Antineoplásicos/farmacología , Femenino , Glutatión/metabolismo , Ratones
7.
J Mater Chem B ; 12(19): 4629-4641, 2024 May 15.
Artículo en Inglés | MEDLINE | ID: mdl-38666407

RESUMEN

Enlightened by the great success of the drug repurposing strategy in the pharmaceutical industry, in the current study, material repurposing is proposed where the performance of carbonyl iron powder (CIP), a nutritional intervention agent of iron supplement approved by the US FDA for iron deficiency anemia in clinic, was explored in anti-cancer treatment. Besides the abnormal iron metabolic characteristics of tumors, serving as potential targets for CIP-based cancer therapy under the repurposing paradigm, the efficacy of CIP as a catalyst in the Fenton reaction, activator for dihydroartemisinin (DHA), thus increasing the chemo-sensitivity of tumors, as well as a potent agent for NIR-II photothermal therapy (PTT) was fully evaluated in an injectable alginate hydrogel form. The CIP-ALG gel caused a rapid temperature rise in the tumor site under NIR-II laser irradiation, leading to complete ablation in the primary tumor. Further, this photothermal-ablation led to the significant release of ATP, and in the bilateral tumor model, both primary tumor ablation and inhibition of secondary tumor were observed simultaneously under the synergistic tumor treatment of nutritional-photothermal therapy (NT/PTT). Thus, material repurposing was confirmed by our pioneering trial and CIP-ALG-meditated NT/PTT/immunotherapy provides a new choice for safe and efficient tumor therapy.


Asunto(s)
Adenosina Trifosfato , Antineoplásicos , Rayos Infrarrojos , Animales , Adenosina Trifosfato/metabolismo , Adenosina Trifosfato/química , Ratones , Antineoplásicos/farmacología , Antineoplásicos/química , Inmunoterapia , Reposicionamiento de Medicamentos , Humanos , Rayos Láser , Terapia Fototérmica , Ratones Endogámicos BALB C , Proliferación Celular/efectos de los fármacos , Línea Celular Tumoral , Alginatos/química , Femenino , Hidrogeles/química , Hidrogeles/farmacología , Ensayos de Selección de Medicamentos Antitumorales , Tamaño de la Partícula , Artemisininas/química , Artemisininas/farmacología
8.
Chem Commun (Camb) ; 59(61): 9352-9355, 2023 Jul 27.
Artículo en Inglés | MEDLINE | ID: mdl-37431730

RESUMEN

Transarterial chemoembolization (TACE) is one of the most commonly used treatments for hepatocellular carcinoma (HCC); however, the poor stability of emulsified chemotherapy drugs by iodinated oil always leads to serious systemic cytotoxicity. Herein, a composite hydrogel Epi/Etpoil@MC/XG was proposed by stably distributing ethiodized poppyseed oil (Etpoil) and epirubicin (Epi) in the blend hydrogel of methylcellulose (MC) and xanthan gum (XG). Benefiting from its adjusted thermo-responsive and injectable properties, the Epi/Etpoil@MC/XG has been successfully applied in the embolization of the feeding artery for a VX2 tumor model.


Asunto(s)
Carcinoma Hepatocelular , Quimioembolización Terapéutica , Neoplasias Hepáticas , Humanos , Carcinoma Hepatocelular/tratamiento farmacológico , Neoplasias Hepáticas/tratamiento farmacológico , Hidrogeles/uso terapéutico , Epirrubicina/farmacología , Epirrubicina/uso terapéutico , Aceite Etiodizado/uso terapéutico , Arterias
9.
Colloids Surf B Biointerfaces ; 222: 113066, 2023 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-36525754

RESUMEN

As cells of innate immunity, macrophages are a class of innate immune cells existing in almost all tissues and play a crucial role in bone repair. However, it remains a challenge to modulate the sequential activation of the deferent phenotypes in macrophage when designing the titanium (Ti) implants. In this study, the Mg-Fe layered double hydroxides (LDHs) was coated on Ti substrate through hydrothermal treatment. Further on lipopolysaccharide (LPS) was introduced onto the LDHs through adsorption and ions exchange. The adsorption efficiency of the coating on LPS reached 72.8% in 24 h due to the anion exchange and electrostatic interactions between the LPS and the LDH layers in deionized water. The LDHs-LPS coating released a large amount of LPS in the early stage, which induced macrophages into M1 phenotype via activating TLR-4 → MyD88 and TLR-4 → Ticam-1/2 signal pathways. Subsequently, the M1 macrophages were transformed into M2 phenotype by regulating the integrin α5ß1 of cells by the nanostructures, wetting angle and Mg2+ of the coating. The LDHs-LPS coating endows Ti with the ability of stage immunomodulation, indicating the positive osteoimmunomodulatory property.


Asunto(s)
Lipopolisacáridos , Titanio , Titanio/farmacología , Lipopolisacáridos/farmacología , Receptor Toll-Like 4 , Hidróxidos/farmacología , Hidróxidos/química , Macrófagos , Fenotipo
10.
Regen Biomater ; 10: rbac110, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-36683742

RESUMEN

The content of type I collagen (COL-I) and type III collagen (COL-III) and the ratio between them not only affect the skin elasticity and mechanical strength, but also determine the fibril diameter. In this research, we investigated the age-related changes in COL-I/COL-III ratio with their formed fibril diameter. The experimental result was obtained from high performance liquid chromatography-mass spectrometer, hydroxyproline determination, picrosirius red staining and transmission electron microscopes (TEM), respectively. The result indicated that the COL-I/COL-III ratio in mouse skin increased with aging. From the 0th to 9th week, the COL-I/COLIII ratio increased from 1.3:1 to 4.5:1. From the 9th to the 18th week, it remained between 4.5:1 and 4.9:1. The total content of COL-I and COL-III firstly increased and then decreased with aging. The TEM result showed that the fibril diameter increased with aging. From the 0th to 9th week, the average fibril diameter increased from 40 to 112 nm; From the 9th to 18th weeks, it increased from 112 to 140 nm. After the 9th week. The fibril diameter showed obvious uneven distribution. Thus, the COL-I/COLIII ratio was proportional to the fibril diameter, but inversely proportional to the uniformity of fibril diameter.

11.
ACS Appl Bio Mater ; 6(6): 2303-2313, 2023 06 19.
Artículo en Inglés | MEDLINE | ID: mdl-37190932

RESUMEN

Since the nonspecificity and nonselectivity of traditional treatment models lead to the difficulty of cancer treatment, nanobased strategies are needed to fill in the gaps of current approaches. Herein, a tumor microenvironment (TME)-responsive chemo-photothermal treatment model was developed based on dihydroartemisinin (DHA)-loaded conjugated polymers (DHA@PLGA-PANI). The synthesized DHA@PLGA-PANI exhibited enhanced photothermal properties under mild-acidic conditions and thus triggered local heat at the tumor site. Meanwhile, these iron-doped conjugated polymers of PLGA-PANI were used as the source of Fe, and benefiting from the Fe-dependent cytotoxicity of DHA, the burst of free radicals could be generated in tumors. Therefore, the combination of TME-responsive chemo-photothermal therapy could achieve effective tumor efficacy.


Asunto(s)
Hipertermia Inducida , Neoplasias , Humanos , Polímeros , Terapia Fototérmica , Fototerapia , Neoplasias/tratamiento farmacológico , Microambiente Tumoral
12.
Adv Healthc Mater ; 12(29): e2302059, 2023 11.
Artículo en Inglés | MEDLINE | ID: mdl-37610041

RESUMEN

Bioadhesive hydrogels have attracted considerable attention as innovative materials in medical interventions and human-machine interface engineering. Despite significant advances in their application, it remains critical to develop adhesive hydrogels that meet the requirements for biocompatibility, biodegradability, long-term strong adhesion, and efficient drug delivery vehicles in moist conditions. A biocompatible, biodegradable, soft, and stretchable hydrogel made from a combination of a biopolymer (unmodified natural gelatin) and stretchable biodegradable poly(ethylene glycol) diacrylate is proposed to achieve durable and tough adhesion and explore its use for convenient and effective intranasal hemostasis and drug administration. Desirable hemostasis efficacy and enhanced therapeutic outcomes for allergic rhinitis are accomplished. Biodegradation enables the spontaneous removal of materials without causing secondary damage and minimizes medical waste. Preliminary trials on human subjects provide an essential foundation for practical applications. This work elucidates material strategies for biodegradable adhesive hydrogels, which are critical to achieving robust material interfaces and advanced drug delivery platforms for novel clinical treatments.


Asunto(s)
Hidrogeles , Rinitis Alérgica , Humanos , Hidrogeles/uso terapéutico , Adhesivos , Epistaxis , Adherencias Tisulares
13.
ACS Appl Bio Mater ; 6(9): 3902-3911, 2023 09 18.
Artículo en Inglés | MEDLINE | ID: mdl-37644623

RESUMEN

Hypoxia may enhance the chemoresistance of cancer cells and can significantly compromise the effectiveness of chemotherapy. Many efforts have been made to relieve or reverse hypoxia by introducing more oxygen into the tumor microenvironment (TME). Acting in a diametrically opposite way, in the current study, a novel nanocarrier was designed to further exhaust the oxygen level of the hypoxic TME. By creating such an oxygen depleted TME, the hypoxia-selective cytotoxin can work effectively, and oxygen exhaustion triggered chemotherapy can be achieved. Herein, deoxygenation agent, FDA-approved perfluorocarbon (PFC) and photosensitizer indocyanine green (ICG) for oxygen depletion, along with the hypoxia-activating drug tirapazamine (TPZ), were coincorporated within the poly(lactic-co-glycolic acid) (PLGA) nanoemulsion (ICG/TPZ@PPs) for the treatment of hypoxic tumors. Following hypoxia amplifying through physical oxygen dissolution and photodynamic depletion in tumors, hypoxic chemotherapy could be effectively activated to improve multitreatment synergy. After achieving local tumor enrichment, PFC-mediated oxygen dissolution combined with further ICG-mediated photodynamic therapy (PDT) under near-infrared (NIR) laser irradiation could induce enhanced hypoxia, which would activate the antitumor activity of codelivered TPZ to synergize cytotoxicity. Remarkably, in vivo experimental results exhibited that deoxygenated ICG/TPZ@PPs-based photothermal therapy (PTT), PDT, and hypoxia activated chemotherapy have an excellent synergistic ablation of tumors without obvious side effects, and therefore, a broad prospect of application of this nanocarrier could be expected.


Asunto(s)
Fluorocarburos , Profármacos , Humanos , Profármacos/farmacología , Profármacos/uso terapéutico , Solubilidad , Hipoxia , Oxígeno , Verde de Indocianina/farmacología , Verde de Indocianina/uso terapéutico
14.
ACS Appl Mater Interfaces ; 14(19): 21931-21944, 2022 May 18.
Artículo en Inglés | MEDLINE | ID: mdl-35511491

RESUMEN

Low-dose radioresistance continues to be one of the major limitations for clinical curative treatment of cancer. Luckily, nanotechnology mediated by multifunctional nanomaterials provides potential opportunity to relieve the radioresistance via increasing the radiosensitivity of cancer cells. Herein, an ultrafast fabrication strategy is reported to prepare iron/manganese co-doped bismuth trimetallic nanoparticles (pFMBi NPs) as a multifunctional radiosensitizer for combined therapy. The bismuth matrix provides the intrinsic radiosensitization effect under the low and safe radiation dose via Auger electrons, photoelectrons, and Rayleigh scattering. Meanwhile, co-doping of iron and manganese ions endows pFMBi NPs with both the Fenton reaction property for reactive oxygen species (ROS) generation and photothermal conversion performance for heat production. Additional ROS generation enhances the radiosensitization effect by collaborating with Rayleigh scattering-mediated water radiolysis, and endogenous heat production under near-infrared 808 nm laser irradiation makes DNA more sensitive to radiation and ROS damage. Both in vitro and in vivo evaluations demonstrate the effective antitumor and radiosensitization effects via thermally aided chemodynamic/radiotreatment with a low radiation dose (6 Gy). Therefore, this work provides a potential strategy for overcoming the low-dose radioresistance in cancer therapy.


Asunto(s)
Manganeso , Nanopartículas , Bismuto/farmacología , Línea Celular Tumoral , Iones , Hierro , Manganeso/farmacología , Especies Reactivas de Oxígeno
15.
ACS Appl Bio Mater ; 5(12): 5865-5876, 2022 12 19.
Artículo en Inglés | MEDLINE | ID: mdl-36410719

RESUMEN

Immunogenic cell death (ICD) induced by treatment modalities like chemotherapy, radiotherapy, and photothermal and photodynamic therapy has shown great potential to improve the low response rate of various solid tumors in cancer immunotherapy. However, extensive studies have revealed that the efficacy of cancer treatment is limited by the hypoxia and immunosuppression in the tumor microenvironment (TME). To address these challenges, a hypoxia alleviated and one phototriggered thermal/dynamic nanoplatform based on MnO2@PDA/ICG-BSA (MPIB) is developed for oxygen (O2) self-supply enhanced cancer phototherapy (PT). First, MnO2 transfers intracellular overexpression H2O2 into O2 in the acidic TME through its catalase-like activity to improve the hypoxia and also provide O2 for the following photodynamic therapy. Then, under single NIR-808 nm light irradiation (called the "phototherapeutic window"), excellent photothermal and photodynamic performance of the MPIB is activated for combined PT. Finally, assisted with immune adjuvant cytosine-phospho-guanine, obvious ICD and systemic antitumor immunity was elicited in PT-treated mice and demonstrated significant growth inhibition on distant tumors. This MPIB-based nanoplatform highlights the promise to overcome the limitations of hypoxia and also challenges of immunosuppressive tumor microenvironments for improved cancer immunotherapy.


Asunto(s)
Compuestos de Manganeso , Neoplasias , Ratones , Animales , Compuestos de Manganeso/uso terapéutico , Muerte Celular Inmunogénica , Peróxido de Hidrógeno/uso terapéutico , Óxidos/uso terapéutico , Inmunoterapia , Neoplasias/terapia , Oxígeno/uso terapéutico , Hipoxia/terapia , Microambiente Tumoral
16.
Mater Today Bio ; 16: 100411, 2022 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-36186845

RESUMEN

Bimetallic nanozymes have been emerging as essential catalysts due to their unique physicochemical properties from the monometallics. However, the access to optimize catalytic performance is often limited by the thermodynamic immiscibility and also heterogeneity. Thus, we present a one-step coreduction strategy to prepare the miscible Cu-Pd bimetallic nanozymes with controllable shape and homogeneously alloyed structure. The homogeneity is systematically explored and luckily, the homogeneous introduction of Cu successfully endows Cu-Pd bimetallic nanozymes with enhanced Fenton-like efficiency. Density functional theory (DFT) theoretical calculation reveals that Cu-Pd bimetallic nanozymes exhibit smaller d-band center compared with Pd nanozymes. Easier adsorption of H2O2 molecular contributed by the electronic structure of Cu significantly accelerate the catalytic process together with the strong repulsive interaction between H atom and Pd atom. In vitro cytotoxicity and intracellular ROS generation performance reveal the potential for in vivo biocatalysis. The strategy to construct kinetically miscible Cu-Pd bimetallic nanozymes will guide the development of bimetallic catalysts with excellent Fenton-like efficiency for biocatalytic nanomedicine.

17.
Nanoscale ; 14(17): 6670, 2022 May 05.
Artículo en Inglés | MEDLINE | ID: mdl-35466988

RESUMEN

Correction for 'All-purpose nanostrategy based on dose deposition enhancement, cell cycle arrest, DNA damage, and ROS production as prostate cancer radiosensitizer for potential clinical translation' by Xiao-xiao Guo et al., Nanoscale, 2021, 13, 14525-14537, https://doi.org/10.1039/D1NR03869A.

18.
ACS Appl Mater Interfaces ; 14(4): 4995-5008, 2022 Feb 02.
Artículo en Inglés | MEDLINE | ID: mdl-35051331

RESUMEN

Immunotherapy has established a new paradigm for cancer treatment and made many breakthroughs in clinical practice. However, the rarity of immune response suggests that additional intervention is necessary. In recent years, it has been reported that local tumor destruction (LTD) can cause cancer cell death and induce an immunologic response. Thus, the combination of immunotherapy and LTD methods will be a promising approach to improve immune efficiency for cancer treatment. Herein, a nanobiotechnology platform to achieve high-precision LTD for systemic cancer immunotherapy has been successfully constructed. Possessing radio-sensitizing and photothermal properties, the engineered immunoadjuvant-loaded nanoplatform, which could precisely induce radiotherapy (RT)/photothermal therapy (PTT) to eliminate local tumor and meanwhile lead to the release of tumor-derived protein antigens (TDPAs), has been facilely fabricated by commercialized SPG membrane emulsification technology. Further on, the TDPAs could be captured and form personal nanovaccines in situ to serve as both reservoirs of antigen and carriers of immunoadjuvant, which can effectively improve the immune response. The investigations suggest that the combination of RT/PTT and improved immunotherapy using adjuvant-encapsulated antigen-capturing nanoparticles holds tremendous promise in cancer treatments.


Asunto(s)
Adyuvantes Inmunológicos/farmacología , Materiales Biocompatibles/farmacología , Inmunoterapia , Nanopartículas/química , Neoplasias/terapia , Adyuvantes Inmunológicos/química , Materiales Biocompatibles/química , Humanos , Ensayo de Materiales , Neoplasias/inmunología , Tamaño de la Partícula , Propiedades de Superficie
19.
Theranostics ; 11(13): 6407-6426, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-33995665

RESUMEN

In recent years, metal-phenolic networks (MPNs) have attracted increasing attention for the engineering of multi-functional platforms because of their easy fabrication processes, excellent physicochemical properties, outstanding biocompatibility, and promising theranostic applications. In this review, we summarize recent progress in the design, synthesis, shape-control, biocompatibility evaluation, and potential theranostic applications of MPNs, especially for cancer theranostics. First, we provide an overview of various MPN systems, relevant self-assembly procedures, and shape-controllable preparation. The in vitro and in vivo biocompatibility evaluation of MPNs is also discussed, including co-incubation viability, adhesion, bio-distribution, and inflammation. Finally, we highlight the significant achievements of various MPNs for cancer theranostics, such as tumor imaging, drug delivery, photothermal therapy, radiotherapy, and chemo- and photo-dynamic therapy. This review provides a comprehensive background on the design and controllable synthesis, in vitro and in vivo biocompatibility evaluation, applications of MPNs as cancer theranostic agents, and presents an overview of the most up-to-date achievements in this field.


Asunto(s)
Estructuras Metalorgánicas/uso terapéutico , Neoplasias/diagnóstico por imagen , Neoplasias/terapia , Medicina de Precisión/métodos , Animales , Materiales Biocompatibles , Sistemas de Liberación de Medicamentos , Diseño de Fármacos , Humanos , Inflamación , Ligandos , Estructuras Metalorgánicas/síntesis química , Estructuras Metalorgánicas/farmacocinética , Ratones , Estructura Molecular , Fotoquimioterapia , Fármacos Fotosensibilizantes , Tomografía de Emisión de Positrones , Radioterapia/métodos , Relación Estructura-Actividad , Distribución Tisular
20.
J Mater Chem B ; 9(20): 4098-4110, 2021 05 26.
Artículo en Inglés | MEDLINE | ID: mdl-33913461

RESUMEN

Tannic acid (TA), a large polyphenolic molecule, has long been known for use in food additives, antioxidants, bio-sorbents, animal feed and adhesives due to its intrinsic properties such as antioxidation, metal chelation, and polymerization. Recently, there has been a renewed interest in fabricating engineered advanced materials with TA modification for novel bio-applications. The modification process involves various interactions/reactions based on its diverse chemical structure, contributed by abundant aromatic rings and hydroxyl groups. In addition, the obtained composites are endowed with retained TA activity and novel enhanced properties. Therefore, the aim of this review is to highlight the recent biomedical application of TA-based metal phenolic networks (TA-MPNs) by focusing on their intrinsic properties and the endowed ability for novel engineered functional composites. The potential contributions of TA-MPNs in "Tumor Theranostics", "Anti-Bacterial Ability", "Wound Repair for Skin Regeneration" and "Bone Tissue Regeneration Applications" are summarized in this paper.


Asunto(s)
Antibacterianos/farmacología , Antineoplásicos/farmacología , Bacterias/efectos de los fármacos , Complejos de Coordinación/farmacología , Neoplasias/tratamiento farmacológico , Taninos/farmacología , Antibacterianos/química , Antineoplásicos/química , Complejos de Coordinación/química , Humanos , Taninos/química , Nanomedicina Teranóstica
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