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1.
Plants (Basel) ; 13(17)2024 Aug 23.
Artículo en Inglés | MEDLINE | ID: mdl-39273842

RESUMEN

The management of invasive plants is a challenge when using traditional control methods, which are ineffective for large areas, leading to the abandonment of invaded areas and the subsequent worsening of the situation. Finding potential uses for waste resulting from invaders' management could motivate their control in the long-term, concurrently providing new bio-based resources with different applications. Oxalis pes-caprae is an invasive plant, widely distributed worldwide, which spreads aggressively through bulbils, creating a dense ground cover. This study was designed to assess the potential of Oxalis aboveground waste for use as fertilizer and in ameliorating deficit irrigation effects in growing crops. Diplotaxis tenuifolia (wild rocket) seedlings were planted in pots with soil mixed with Oxalis waste at 0, 2.2 and 4.3 kg m-2 or with commercial fertilizer, left to grow for 27 days and then irrigated at 100% or 50% field capacity for 14 days. The incorporation of the Oxalis waste improved the biomass, photosynthesis, sugars, total phenols and total antioxidant capacity in the crop, achieving commercial fertilization values, as well as increasing the phosphorus in soils. However, Oxalis waste seems not to directly affect plants' relative water contents. Our results support the use of Oxalis waste as fertilizer, which can encourage the long-term control of this invasive species.

2.
Molecules ; 29(17)2024 Sep 04.
Artículo en Inglés | MEDLINE | ID: mdl-39275030

RESUMEN

As cellular senescence, reactive oxygen species (ROS) accumulate excessively, causing cellular damage. Flavonoids derived from natural products are known for their antioxidant effects and their ability to delay cellular senescence. Previous studies have attempted to mitigate cellular senescence using flavonoids from natural sources. However, the detailed mechanisms and regulatory targets of some flavonoids exhibiting antioxidant effects have not been fully elucidated. Therefore, we screened a library of flavonoids for antioxidant properties. Isoschaftoside, a glycosidic flavonoid, significantly reduced ROS levels in senescent cells. It was found that mitochondrial function was restored, and dependence on glycolysis was reduced in senescent cells treated with isoschaftoside. Additionally, we identified that isoschaftoside suppresses ROS by reducing the expression of RAC2 and LINC00294 in senescent cells. Taken together, this study establishes a novel mechanism for ROS inhibition and the regulation of cellular senescence by isoschaftoside. Our findings contribute important insights to antioxidant and anti-senescence research.


Asunto(s)
Antioxidantes , Senescencia Celular , Proteína RCA2 de Unión a GTP , Especies Reactivas de Oxígeno , Proteínas de Unión al GTP rac , Senescencia Celular/efectos de los fármacos , Humanos , Especies Reactivas de Oxígeno/metabolismo , Proteínas de Unión al GTP rac/metabolismo , Proteínas de Unión al GTP rac/genética , Antioxidantes/farmacología , Antioxidantes/química , Mitocondrias/metabolismo , Mitocondrias/efectos de los fármacos , Glicósidos/farmacología , Glicósidos/química , Flavonoides/farmacología , Flavonoides/química , Línea Celular
3.
Arch Biochem Biophys ; : 110154, 2024 Sep 13.
Artículo en Inglés | MEDLINE | ID: mdl-39278305

RESUMEN

Kaempferol can exert biological functions by regulating various signaling pathways. This study evaluated the ameliorative effect of kaempferol on lipid accumulation using oleic acid and palmitic acid-treated HepG2 cells and high-fat diet mice. In vitro oil red O staining showed that kaempferol treatment improved lipid accumulation (p < 0.001 for TG content and p < 0.05 for TC content). Immunofluorescence, western blot analysis and RT-qPCR showed that kaempferol could promote nuclear translocation of PPARγ and reduce the expression of PPARγ, C/EBPß, and SREBP-1c. Dietary intervention with kaempferol could reduce the lipid accumulation in hepatocytes and inflammatory cell infiltration, as well as attenuated serum levels of IL-6 and TNF-α in HFD-fed mice (p < 0.001 for IL-6 and p < 0.01 for TNF-α at kaempferol 60 mg/kg/d). Meanwhile, histopathological examination revealed that there was no substantial damage or distinct inflammation lesions in organs at the experimental dose, including the heart, lung, kidney, and spleen. The aforementioned research findings can serve as references for further preclinical investigations on the potential of kaempferol to mitigate lipid accumulation.

4.
Heliyon ; 10(17): e36762, 2024 Sep 15.
Artículo en Inglés | MEDLINE | ID: mdl-39263153

RESUMEN

To investigate the effect of poly-γ-glutamic acid (γ-PGA) biopreparation on ameliorating coastal saline soil, three treatments were established: soil salt washed treatment (CK), soil salt washed with added γ-PGA (PGA), soil salt washed with added γ-PGA biopreparation (PGAB). This study determined the effects of γ-PGA on coastal saline soil by analyzing soil aggregate, soil evaporation, soil vertical water and salt distribution, and soil cation content, soil pH, soil nutrient content and soil microorganism quantity. Results showed that γ-PGA had an ameliorative effect on saline soil, with the PGAB treatment exhibiting the most pronounced ameliorative effect compared to CK. Adding PGAB reduced soil evaporation by 30.45 %, soil salt content by 27.91 %, meanwhile increasing plant height by 33.86 %, plant fresh weight by 98.54 %, soil aggregate diameter by 6.68 times, soil water content by 26.47 % (P < 0.05). Additionally, soil total nitrogen was increased by 50.0 % in PGAB treatment, and available nitrogen and phosphorus contents were increased by 1.68 times and 85.83 % (P < 0.05), respectively. Populations of soil-culturable bacteria and fungi of PGAB treatment increased by 65.96 % and 1.23 times, respectively (P < 0.05). After salt-washing process, adding PGAB improved soil physicochemical properties, which altered the ecological environment of rhizosphere soil and promoted plant growth. The results can provide a practical approach for ameliorating coastal saline soils.

5.
New Phytol ; 2024 Aug 21.
Artículo en Inglés | MEDLINE | ID: mdl-39165156

RESUMEN

Theory questions the persistence of nonreciprocal interactions in which one plant has a positive net effect on a neighbor that, in return, has a negative net impact on its benefactor - a phenomenon known as antagonistic facilitation. We develop a spatially explicit consumer-resource model for belowground plant competition between ecosystem engineers, plants able to mine resources and make them available for any other plant in the community, and exploiters. We use the model to determine in what environmental conditions antagonistic facilitation via soil-resource engineering emerges as an optimal strategy. Antagonistic facilitation emerges in stressful environments where ecosystem engineers' self-benefits from mining resources outweigh the competition with opportunistic neighbors. Among all potential causes of stress considered in the model, the key environmental parameter driving changes in the interaction between plants is the proportion of the resource that becomes readily available for plant consumption in the absence of any mining activity. Our results align with theories of primary succession and the stress gradient hypothesis. However, we find that the total root biomass and its spatial allocation through the root system, often used to measure the sign of the interaction between plants, do not predict facilitation reliably.

6.
Exp Eye Res ; 247: 110041, 2024 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-39147192

RESUMEN

Dry eye disease (DED) is a common ocular condition affecting a significant portion of the global population, yet effective treatment options remain elusive. This study investigates the therapeutic potential of M2 macrophage-derived extracellular vesicles (M2-EVs) in a mouse model of DED. The DED model was established using 0.2% benzalkonium chloride (BAC) eye drops, applied twice daily for a week. Post induction, the mice were categorized into 5 groups: PBS, Sodium Hyaluronate (HA, 0.1%), Fluoromethalone (FM, 0.1%), M0-EVs, and M2-EVs. The efficacy of M2-EVs was assessed through tear production, corneal fluorescein staining and HE staining. RNA sequencing (RNA-seq) was employed to investigate the mechanisms underlying the therapeutic effects of M2-EVs in DED. Notably, the M2-EVs treated group exhibited the highest tear secretion, indicating improved tear film stability and reduced corneal surface damage. Histological analysis revealed better corneal structure organization in the M2-EVs group, suggesting enhanced ocular surface repair and corneal preservation. Furthermore, M2-EVs treatment significantly decreased pro-inflammatory cytokine levels and showed unique enrichment of genes related to retinal development. These findings suggest that M2-EVs could serve as a promising noninvasive therapeutic approach for human DED, targeting ocular surface inflammation.


Asunto(s)
Compuestos de Benzalconio , Modelos Animales de Enfermedad , Síndromes de Ojo Seco , Vesículas Extracelulares , Macrófagos , Ratones Endogámicos C57BL , Lágrimas , Animales , Síndromes de Ojo Seco/tratamiento farmacológico , Síndromes de Ojo Seco/metabolismo , Síndromes de Ojo Seco/inducido químicamente , Vesículas Extracelulares/metabolismo , Ratones , Macrófagos/metabolismo , Macrófagos/efectos de los fármacos , Lágrimas/metabolismo , Conservadores Farmacéuticos , Soluciones Oftálmicas , Córnea/metabolismo , Córnea/efectos de los fármacos , Córnea/patología , Citocinas/metabolismo , Femenino
7.
J Environ Manage ; 368: 122066, 2024 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-39116811

RESUMEN

Fly ash (FA) is a very alkaline, hazardous waste with a potential to be recycled in amelioration of master pedovariables, notably: i) pH, drives soil biogeochemistry, ii) electrical conductivity (EC), reflects soil salinity level and overall soil health, iii) water holding capacity (WHC), determines soil hydraulic functions and iv) bulk denisity (BD), indicates soil compaction and water-air relations. We performed a multilevel meta-analysis, encompassing 30 out of 1325 screend studies, using a random effect model and non-aggregated data sets. By moderating; experimental type, FA application rate, soil type and land use, two distinct meta-analytical approaches on observed pedovariables were performed: i) uni-moderator, considering moderators separately, and ii) multi-moderator, considering moderators combined. It was found that FA application: increased soil pH by 15.4% (Hedge's g = 8.07), EC by 51.7% (Hedge's g = 8.07), WHC by 22.6% (Hedge's g = 7.79), and reduced BD by 13.5% (Hedge's g = -5.03). However, the uni-moderator meta-analytical model revealed a significant increase in pH and EC only with relatively lower FA dosage (up to 20%). In addition, the impact of FA on pH and EC was significantly positive in acid (pHH2O < 6.5), negative in alkaline (pHH2O > 7.2), and not significant in neutral (pHH2O = 6.6-7.2) soil types. The same uni-moderator approach revealed that FA dosages above 5% significantly increased WHC, but reduced BD. Moreover, the multi-moderator model identified two significant interactions: i) between varying FA dosage and land use, and ii) between varying FA dosage and soil type. Confirmed positive implications of FA on key soil properties underscore its strong potential as a valuable resource for sustainable soil management, mitigating widespread soil constraints and contributing waste reduction. However, careful consideration of FA dosage, soil type, and land use is imperative to optimize FA application and prevent potential adverse environmental implications.


Asunto(s)
Ceniza del Carbón , Suelo , Suelo/química , Concentración de Iones de Hidrógeno
8.
Food Sci Biotechnol ; 33(9): 2111-2121, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-39130671

RESUMEN

Gut represents one of the largest interfaces for the interaction of host factors and the environmental ones. Gut microbiota, largely dominated by bacterial community, plays a significant role in the health status of the host. The healthy gut microbiota fulfills several vital functions such as energy metabolism, disease protection, and immune modulation. Dysbiosis, characterized by microbial imbalance, can contribute to the development of various disorders, including intestinal, systemic, metabolic, and neurodegenerative conditions. Probiotics offer the potential to address dysbiosis and improve overall health. Advancements in high-throughput sequencing, bioinformatics, and omics have enabled mechanistic studies for the development of bespoke probiotics, referred to as next generation probiotics. These tailor-made probiotics have the potential to ameliorate specific disease conditions and thus fulfill the specific consumer needs. This review discusses recent updates on the most promising next generation probiotics, along with the challenges that must be addressed to translate this concept into reality.

9.
Bioethics ; 38(7): 650-658, 2024 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-38949245

RESUMEN

The modern concept of 'family' in the United States recognizes many types of social groups as families, a conceptual shift which was largely helped along by advancements in assisted reproductive technologies enabling those formerly unable to biologically reproduce to have children, as well as by social movements aimed at garnering recognition for these emergent nonbiologically related social groups spearheaded by LGBTQ+ and adoption activists. That these social groups are now recognized as types of families is unquestionably an improvement to the concept, though there are still defects in the concept that preclude these nonnuclear families from achieving the same social-ontological status as nuclear families. Drawing from the nascent philosophical field of conceptual engineering, I analyze our current conception of 'family' and argue that it is tacitly exclusionary of nonnuclear families, which can be attributed to a combination of widespread genetic essentialism and linguistic practices that unduly cast the nuclear family as a more desirable type of family by emphasizing genetic relatedness as a valuable quality. I then offer proposals to ameliorate these defects, such as educational interventions to reduce genetic essentialism and the introduction of new terminology that does not connote one type of family as being superior to another. In doing so, my hope is to reveal and begin to resolve an overlooked defect in the concept of 'family' in order to bolster the movement to view all families as equal.


Asunto(s)
Familia , Humanos , Estados Unidos , Minorías Sexuales y de Género , Núcleo Familiar , Técnicas Reproductivas Asistidas/ética , Femenino
10.
Environ Technol ; : 1-20, 2024 Jun 10.
Artículo en Inglés | MEDLINE | ID: mdl-38853669

RESUMEN

High concentrations of ammonium, phosphate, and phenol are recognized as water pollutants that contribute to the degradation of soil acidity. In contrast, small quantities of these nutrients are essential for soil nutrient cycling and plant growth. Here, we reported composite materials comprising biochar, chitosan, ZrO, and Fe3O4, which were employed to mitigate ammonium, phosphate, and phenol contamination in water and to lessen soil acidity. Batch adsorption experiments were conducted to assess the efficacy of the adsorbents. Initially, comparative studies on the simultaneous removal of NH4, PO4, and phenol using CB (biochar), CBC (biochar + chitosan), CBCZrO (biochar + chitosan + ZrO), and CBCZrOFe3O4 (biochar + chitosan + ZrO + Fe3O4) were conducted. The results discovered that CBCZrOFe3O4 exhibited the highest removal percentage among the adsorbents (P < 0.05). Adsorption data for CBCZrOFe3O4 were well fitted to the second-order kinetic and Freundlich isotherm models, with maximum adsorption capacities of 112.65 mg/g for NH4, 94.68 mg/g for PO4 and 112.63 mg/g for phenol. Subsequently, the effect of CBCZrOFe3O4-loaded NH4, PO4, and phenol (CBCZrOFe3O4-APP) on soil acidity was studied over a 60-day incubation period. The findings showed no significant changes (P < 0.05) in soil exchangeable acidity, H+, Mg, K, and Na. However, there was a substantial increase in the soil pH, EC, available P, CEC, N-NH4, and N-NO3. A significant reduction was also observed in the available soil exchangeable Al and Fe (P < 0.05). This technique demonstrated multi-functionality in remediating water pollutants and enhancing soil acidity.

11.
Toxicol Lett ; 396: 48-69, 2024 May 15.
Artículo en Inglés | MEDLINE | ID: mdl-38677566

RESUMEN

Pollution from microplastics (MPs) and nanoplastics (NPs) has gained significant public attention and has become a serious environmental problem worldwide. This review critically investigates MPs/NPs' ability to pass through biological barriers in vertebrate models and accumulate in various organs, including the brain. After accumulation, these particles can alter individuals' behaviour and exhibit toxic effects by inducing oxidative stress or eliciting an inflammatory response. One major concern is the possibility of transgenerational harm, in which toxic consequences are displayed in offspring who are not directly exposed to MPs/NPs. Due to their large and marked surface hydrophobicity, these particles can easily absorb and concentrate various environmental pollutants, which may increase their toxicity to individuals and subsequent generations. This review systematically provides an analysis of recent studies related to the toxic effects of MPs/NPs, highlighting the intricate interplay between co-contaminants in vitro and in vivo. We further delve into mechanisms of MPs/NPs-induced toxicity and provide an overview of potential therapeutic approaches to lessen the negative effects of these MPs/NPs. The review also emphasizes the urgency of future studies to examine the long-term effects of chronic exposure to MPs/NPs and their size- and type-specific hazardous dynamics, and devising approaches to safeguard the affected organisms.


Asunto(s)
Microplásticos , Nanopartículas , Microplásticos/toxicidad , Animales , Nanopartículas/toxicidad , Humanos , Conducta Animal/efectos de los fármacos , Contaminantes Ambientales/toxicidad , Exposición a Riesgos Ambientales/efectos adversos , Medición de Riesgo , Vertebrados/metabolismo
12.
J Sci Food Agric ; 104(11): 6884-6892, 2024 Aug 30.
Artículo en Inglés | MEDLINE | ID: mdl-38591419

RESUMEN

BACKGROUND: Poly-γ-glutamic acid (γ-PGA) is employed extensively in agriculture to enhance soil water retention; however, the underlying mechanism by which γ-PGA improves soil structure and soybean productivity in arid regions remains poorly understood. A micro-scale field experiment was conducted in the arid region of northwest China, employing five concentrations of γ-PGA to investigate its impacts on soybean yield, photosynthesis, and water-use efficiency, as well as soil aggregates and water distribution. The five levels of γ-PGA were 0 (CK), 10 (P1), 20 (P2), 40 (P3), and 80 kg ha-1 (P4). RESULTS: The results demonstrated that the application of γ-PGA significantly improved soybean yield, photosynthesis, and chlorophyll content. It resulted in a decrease in soil aggregate content with a maximum diameter of less than 0.053 mm and an increase in the stability of soil aggregates in the uppermost layer of the soil (0-30 cm). The application of γ-PGA significantly increased soil water content, particularly in the uppermost layer of the soil, and effectively reduced water consumption and improving water use efficiency in soybeans. Overall, the P3 treatment exhibited the most pronounced improvement of soybean yield, photosynthesis, water-use efficiency, as well as distribution of soil aggregates and water. The correlation matrix heatmap also revealed a strong correlation between improvement of soybean yield or photosynthesis at various γ-PGA application levels and the enhancement of soil stability or soil water content. CONCLUSION: The multivariate regression analysis revealed that an optimal application level of 46 kg ha-1 γ-PGA could enhance effectively both yield and water use efficiency of soybean in the arid region of northwest China. © 2024 Society of Chemical Industry.


Asunto(s)
Glycine max , Fotosíntesis , Ácido Poliglutámico , Suelo , Agua , Glycine max/crecimiento & desarrollo , Glycine max/metabolismo , Glycine max/química , Suelo/química , Ácido Poliglutámico/análogos & derivados , Ácido Poliglutámico/metabolismo , Agua/metabolismo , Agua/análisis , China , Fertilizantes/análisis , Clorofila/metabolismo
13.
Plants (Basel) ; 13(4)2024 Feb 15.
Artículo en Inglés | MEDLINE | ID: mdl-38498577

RESUMEN

Salinity is one of the most common abiotic stress factors affecting different biochemical and physiological processes in plants, inhibiting plant growth, and greatly reducing productivity. During the last decade, silicon (Si) supplementation was intensively studied and now is proposed as one of the most convincing methods to improve plant tolerance to salt stress. In this review, we discuss recent papers investigating the role of Si in modulating molecular, biochemical, and physiological processes that are negatively affected by high salinity. Although multiple reports have demonstrated the beneficial effects of Si application in mitigating salt stress, the exact molecular mechanism underlying these effects is not yet well understood. In this review, we focus on the localisation of Si transporters and the mechanism of Si uptake, accumulation, and deposition to understand the role of Si in various relevant physiological processes. Further, we discuss the role of Si supplementation in antioxidant response, maintenance of photosynthesis efficiency, and production of osmoprotectants. Additionally, we highlight crosstalk of Si with other ions, lignin, and phytohormones. Finally, we suggest some directions for future work, which could improve our understanding of the role of Si in plants under salt stress.

14.
J Environ Manage ; 354: 120498, 2024 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-38417361

RESUMEN

Liming, as a common amelioration practice worldwide, has the potential to alleviate soil acidification and ensure crop production. However, the impacts of long-term liming on the temperature sensitivity (Q10) of soil organic carbon (SOC) mineralization and its response to labile C input remain unclear. To fill the knowledge gap, soil samples were collected from a long-term (∼10 years) field trial with unlimed and limed (CaO) plots. These soil samples were incubated at 15 °C and 25 °C for 42 days, amended without and with 13C-labeled glucose. Results showed that compared to the unlimed soil (3.6-8.6 mg C g-1 SOC), liming increased SOC mineralization (6.1-11.2 mg C g-1 SOC). However, liming significantly mitigated the positive response of SOC mineralization to warming, resulting in a lower Q10. Long-term liming increased bacterial richness and Shannon diversity as well as their response to warming which were associated with the decreased Q10. Furthermore, the decreased Q10 due to liming was attributed to the decreased response of bacterial oligotrophs/copiotrophs ratio, ß-glucosidase and xylosidase activities to warming. Labile C addition had a strong impact on Q10 in the unlimed soil, but only a marginal influence in the limed soil. Overall, our research highlights that acidification amelioration by long-term liming has the potential to alleviate the positive response of SOC mineralization to warming and labile C input, thereby facilitating SOC stability in agroecosystems, especially for acidic soils in subtropical regions.


Asunto(s)
Compuestos de Calcio , Carbono , Suelo , Microbiología del Suelo , Óxidos
15.
BMC Immunol ; 25(1): 2, 2024 01 03.
Artículo en Inglés | MEDLINE | ID: mdl-38172683

RESUMEN

BACKGROUND: Despite the functions of TLRs in the parasitic infections have been extensively reported, few studies have addressed the role of TLR3 in the immune response to Schistosoma japonicum infections. The aim of this study was to investigate the properties of TLR3 in the liver of C57BL/6 mice infected by S. japonicum. METHODS: The production of TLR3+ cells in CD4+T cells (CD4+CD3+), CD8+T cells (CD8+CD3+), γδT cells (γδTCR+CD3+), NKT cells (NK1.1+CD3+), B cells (CD19+CD3-), NK (NK1.1-CD3+) cells, MDSC (CD11b+Gr1+), macrophages (CD11b+F4/80+), DCs (CD11c+CD11b+) and neutrophils (CD11b+ Ly6g+) were assessed by flow cytometry. Sections of the liver were examined by haematoxylin and eosin staining in order to measure the area of granulomas. Hematological parameters including white blood cell (WBC), red blood cell (RBC), platelet (PLT) and hemoglobin (HGB) were analyzed. The levels of ALT and AST in the serum were measured using biochemical kits. The relative titers of anti-SEA IgG and anti-SEA IgM in the serum were measured by enzyme-linked immunosorbent assay (ELISA). CD25, CD69, CD314 and CD94 molecules were detected by flow cytometry. RESULTS: Flow cytometry results showed that the expression of TLR3 increased significantly after S. japonicum infection (P < 0.05). Hepatic myeloid and lymphoid cells could express TLR3, and the percentages of TLR3-expressing MDSC, macrophages and neutrophils were increased after infection. Knocking out TLR3 ameliorated the damage and decreased infiltration of inflammatory cells in infected C57BL/6 mouse livers.,The number of WBC was significantly reduced in TLR3 KO-infected mice compared to WT-infected mice (P < 0.01), but the levels of RBC, platelet and HGB were significantly increased in KO infected mice. Moreover, the relative titers of anti-SEA IgG and anti-SEA IgM in the serum of infected KO mice were statistically decreased compared with the infected WT mice. We also compared the activation-associated molecules expression between S.japonicum-infected WT and TLR3 KO mice. CONCLUSIONS: Taken together, our data indicated that TLR3 played potential roles in the context of S. japonicum infection and it may accelerate the progression of S. japonicum-associated liver pathology.


Asunto(s)
Schistosoma japonicum , Animales , Ratones , Schistosoma japonicum/metabolismo , Receptor Toll-Like 3/metabolismo , Ratones Endogámicos C57BL , Inmunoglobulina G , Inmunoglobulina M
16.
Biofabrication ; 16(2)2024 02 07.
Artículo en Inglés | MEDLINE | ID: mdl-38277678

RESUMEN

The inflammatory response is one of the general symptoms that accompany tumorigenesis, the pro-inflammatory factors cyclooxygenase-2 (COX-2) and COX-2-derived prostaglandin-2 (PGE-2) in the inflammatory environment surrounding tumors possess promoting tumor development, metastasis and angiogenesis effects. In addition, the hypoxic environment of tumors severely limits the effectiveness of photodynamic therapy (PDT). In this study, a universal extracellular-intracellular 'on-demand' release nanomedicine DOX@PDA-ICG@MnO2@GN-CEL was developed for the combined fight against malignant tumors using a spatiotemporal controlled gelatin coated polydopamine (PDA@GN) as the carrier and loaded with the chemotherapeutic drug doxorubicin (DOX), the photosensitizer indocyanine green (ICG), the PDT enhancer MnO2and the anti-inflammatory drug celecoxib (CEL) individually. Our results showed that DOX@PDA-ICG@MnO2@GN-CEL could release CEL extracellularly by matrix metalloproteinase-2 response and inhibit the COX-2/PGE-2 pathway, reduce chemotherapy resistance and attenuate the concurrent inflammation. After entering the tumor cells, the remaining DOX@PDA-ICG@MnO2released DOX, ICG and MnO2intracellularly through PDA acid response. MnO2promoted the degradation of endogenous H2O2to generate oxygen under acidic conditions to alleviate the tumor hypoxic environment, enhance PDT triggered by ICG. PDA and ICG exhibited photothermal therapy synergistically, and DOX exerted chemotherapy with reduced chemotherapy resistance. The dual responsive drug release switch enabled the chemotherapeutic, photothermal, photodynamic and anti-inflammatory drugs precisely acted on different sites of tumor tissues and realized a promising multimodal combination therapy.


Asunto(s)
Hipertermia Inducida , Nanopartículas , Neoplasias , Humanos , Metaloproteinasa 2 de la Matriz , Liberación de Fármacos , Microambiente Tumoral , Ciclooxigenasa 2 , Compuestos de Manganeso , Hipertermia Inducida/métodos , Óxidos , Doxorrubicina/farmacología , Verde de Indocianina/farmacología , Antiinflamatorios , Línea Celular Tumoral
17.
Can J Aging ; 43(1): 12-22, 2024 03.
Artículo en Inglés | MEDLINE | ID: mdl-37503824

RESUMEN

Specialized geriatric services care for older adults (≥ 65 years of age) with dementia and other progressive neurological disorders, frailty, and mental health conditions were provided both virtually and in person during the pandemic. The objective of this study was to implement a software-enabled standardized self-report instrument - the interRAI Check-Up Self-Report - to remotely assess patients. A convergent, mixed-methods research design was employed. Staff found the instrument easy to use and the program-level metrics helpful for planning. Most patients urgently needed a geriatrician assessment (72%) and had moderate to severe cognitive (34%) and functional impairments (34%), depressive symptoms (53%), loneliness (57%), daily pain (32%), and distressed caregivers (46%). Implementation considerations include providing ongoing support and facilitating intersectoral collaboration. The Check Up enhanced the geriatric assessment process by creating a system to track all needs for immediate and future care at both the patient and program level.


Asunto(s)
COVID-19 , Fragilidad , Humanos , Anciano , Autoinforme , Pandemias , Cuidadores/psicología
18.
Can J Diabetes ; 48(1): 3-9.e7, 2024 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-37549869

RESUMEN

OBJECTIVE: People living with diabetes mellitus (DM) and chronic kidney disease can have difficulty attending multiple appointments to receive DM care. We developed and studied the utility of a DM outreach program to offer in the hemodialysis (HD) unit. METHODS: We conducted a quality improvement project in a satellite HD unit in London, Ontario, Canada, between August 1, 2019, and July 31, 2022. We assessed for baseline gaps in DM care among those with DM, performed root-cause analysis with key stakeholders to identify critical drivers of gaps, and conceptualized a certified diabetes educator-led outreach program to offer in the HD unit. We aimed to improve DM self-monitoring, hypo- and hyperglycemia, and DM-related screening. We used run and control charts to track outcome measures over time and modified our outreach program iteratively. RESULTS: Fifty-eight persons with DM receiving HD participated in our program. Support spanned multiple waves of the COVID-19 pandemic. With 4 tests of change, we observed improvement in DM self-monitoring with a modest decline in self-reported hyperglycemia. There were no adverse consequences, and satisfaction with our program was high. CONCLUSIONS: Although we did not meet all measures of success during the pandemic, outreach DM support in the HD unit appeared to improve self-monitoring and self-reported hyperglycemia. Similar programs could be modified and implemented in other centres.


Asunto(s)
COVID-19 , Diabetes Mellitus Tipo 2 , Hiperglucemia , Humanos , Diabetes Mellitus Tipo 2/etiología , Pandemias , Diálisis Renal/efectos adversos , Unidades de Hemodiálisis en Hospital , Mejoramiento de la Calidad , COVID-19/epidemiología , Hiperglucemia/epidemiología , Hiperglucemia/prevención & control , Hiperglucemia/etiología , Ontario/epidemiología
19.
Can J Aging ; : 1-9, 2023 Dec 04.
Artículo en Inglés | MEDLINE | ID: mdl-38044629

RESUMEN

Long-term care homes (LTCHs) were disproportionately affected by the coronavirus disease (COVID-19) pandemic, creating stressful circumstances for LTCH employees, residents, and their care partners. Team huddles may improve staff outcomes and enable a supportive climate. Nurse practitioners (NPs) have a multifaceted role in LTCHs, including facilitating implementation of new practices. Informed by a community-based participatory approach to research, this mixed-methods study aimed to develop and evaluate a toolkit for implementing NP-led huddles in an LTCH. The toolkit consists of two sections. Section one describes the huddles' purpose and implementation strategies. Section two contains six scripts to guide huddle discussions. Acceptability of the intervention was evaluated using a quantitative measure (Treatment Acceptability Questionnaire) and through qualitative interviews with huddle participants. Descriptive statistics and manifest content analysis were used to analyse quantitative and qualitative data. The project team rated the toolkit as acceptable. Qualitative findings provided evidence on design quality, limitations, and recommendations for future huddles.

20.
J Agric Food Chem ; 71(45): 17080-17096, 2023 Nov 15.
Artículo en Inglés | MEDLINE | ID: mdl-38104279

RESUMEN

Ursodeoxycholic acid (UDCA) has been broadly adopted for the clinical treatment of hepatic and biliary diseases; however, its poor water-solubility becomes an obstacle in wide applications. To overcome these challenges, herein, a two-tier UDCA-embedded system of zein nanoparticles (NPs) along with a polyelectrolyte complex was designed under facile conditions. Both the UDCA-zein NPs and their inclusion microcapsules showed a spherical shape with a uniform size. A typical wall plus capsule/core structure was formed in which UDCA-zein NPs distributed evenly in the interior. The UDCA inclusion microcapsules had an encapsulation rate of 67% and were released in a non-Fickian or anomalous transport manner. The bioavailability and efficacy of UDCA-zein NPs were assessed in vivo through the alcoholic liver disease (ALD) mouse model via intragastric administration. UDCA-zein NPs ameliorated the symptoms of ALD mice remarkably, which were mainly exerted through attenuation of antioxidant stress levels. Meanwhile, it notably upregulated the intestinal tight junction protein expression and improved and maintained the integrity of the mucosal barrier effectively. Collectively, with the improvement of bioavailability, the UDCA-zein NPs prominently alleviated the oxidative damage induced by alcohol, modulating the inflammation so as to restore ALD. It is anticipated that UDCA-zein NPs have great therapeutic potential as sustained-nanovesicles in ALD treatment.


Asunto(s)
Nanopartículas , Zeína , Ratones , Animales , Ácido Ursodesoxicólico/metabolismo , Ácido Ursodesoxicólico/farmacología , Ácido Ursodesoxicólico/uso terapéutico , Zeína/metabolismo , Cápsulas/metabolismo , Hígado/metabolismo , Inflamación/tratamiento farmacológico , Estrés Oxidativo
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