Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 59
Filtrar
Mais filtros

Base de dados
Tipo de documento
Intervalo de ano de publicação
1.
Small ; 20(29): e2400666, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38368259

RESUMO

Compared to conventional radiotherapy (RT), FLASH-RT delivers ultra-high dose radiation, significantly reducing damage to normal tissue while guaranteeing the effect of cancer treatment. However, cancer recurrence and metastasis frequently occur after all RT due to the existence of intractable cancer stem cells (CSCs). To address this, a biomimetic nanoplatform (named TAFL) of tumor-derived exosome fusion liposomes is designed by co-loading aggregation-induced emission photothermal agents, TPE-BBT, and anti-cancer drugs, aspirin, aiming to clear CSCs for inhibiting cancer recurrence and metastasis after FLASH-RT therapy . Aspirin released in TAFL system triggered by laser irradiation can induce apoptosis and DNA damage of 4T1 CSCs, comprehensively downregulate their stemness phenotype, and inhibit their sphericity. Furthermore, the TPE-BBT mediated mild-photothermal therapy can alleviate the hypoxic tumor microenvironment, inhibit the DNA repair of CSCs, which further amplifies the effect of aspirin against CSCs, therefore reduces the effective dose of aspirin, making TAFL more biologically safe. In vivo experimental results demonstrated that decreased CSCs population mediated by TAFL system treatment significantly inhibited tumor recurrence and metastasis after FLASH-RT therapy. In summary, this TAFL system   provides a new idea for the future clinical application of FLASH-RT therapy.


Assuntos
Aspirina , Neoplasias da Mama , Metástase Neoplásica , Células-Tronco Neoplásicas , Células-Tronco Neoplásicas/efeitos dos fármacos , Células-Tronco Neoplásicas/patologia , Neoplasias da Mama/patologia , Neoplasias da Mama/tratamento farmacológico , Animais , Feminino , Aspirina/farmacologia , Aspirina/uso terapêutico , Linhagem Celular Tumoral , Recidiva Local de Neoplasia , Camundongos , Humanos , Dano ao DNA , Microambiente Tumoral/efeitos dos fármacos , Lipossomos/química , Apoptose/efeitos dos fármacos , Biomimética/métodos , Materiais Biomiméticos/química , Materiais Biomiméticos/farmacologia , Exossomos/metabolismo
2.
Psychooncology ; 33(1): e6264, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-38047719

RESUMO

OBJECTIVE: Fear of cancer recurrence (FCR) is common in breast cancer survivors (BCS). This study examined the mediating role of illness representations in the relationships between FCR and physical symptoms, social constraint and self-care self-efficacy. METHODS: In this cross-sectional study, 385 women with breast cancer completed a series of questionnaires including the FCR Inventory, Social Constraints Scale-15, Cancer Survivors Self-Efficacy Scale, Illness Perception Questionnaire-Revised and European Organization for Research and Treatment Quality of Life Questionnaire-Breast Cancer. Structural equation modelling method was conduct by using a bootstrapping method. RESULTS: Physical symptoms (ß = 0.272, p < 0.01), social constraints (ß = 0.130, p < 0.01), self-efficacy (ß = -0.233, p < 0.01) and illness representation (ß = 0.261, p < 0.01) have direct effects on FCR. The indirect effects of physical symptoms (ß = 0.10, p < 0.01), social constraints (ß = 0.076, p < 0.01) and self-efficacy (ß = -0.025, p < 0.05) on FCR were partially mediated by illness representations. CONCLUSIONS: In this study, the effects of physical symptoms, social constraints and self-efficacy on FCR were found to be mediated by illness representation. Reducing the impact of negative illness representations on FCR by reducing physical symptoms, increasing self-efficacy, and promoting open disclosure of cancer-related concerns may be effective in reducing FCR in BCS.


Assuntos
Neoplasias da Mama , Sobreviventes de Câncer , Humanos , Feminino , Qualidade de Vida , Autoeficácia , Neoplasias da Mama/terapia , Estudos Transversais , Recidiva Local de Neoplasia , Medo
3.
Support Care Cancer ; 32(3): 155, 2024 Feb 13.
Artigo em Inglês | MEDLINE | ID: mdl-38347229

RESUMO

PURPOSE: Sleep problems are a significant issue in patients with lung cancer, and resilience is a closely related factor. However, few studies have identified subgroups of resilience and their relationship with sleep quality. This study aimed to investigate whether there are different profiles of resilience in patients with lung cancer, to determine the sociodemographic characteristics of each subgroup, and to determine the relationship between resilience and sleep quality in different subgroups. METHODS: A total of 303 patients with lung cancer from four tertiary hospitals in China completed the General Sociodemographic sheet, the Connor-Davidson Resilience Scale, and the Pittsburgh Sleep Quality Index. Latent profile analysis was applied to explore the latent profiles of resilience. Multivariate logistic regression was used to analyze the sociodemographic variables in each profile, and ANOVA was used to explore the relationships between resilience profiles and sleep quality. RESULTS: The following three latent profiles were identified: the "high-resilience group" (30.2%), the "moderate-resilience group" (46.0%), and the "low-resilience group" (23.8%). Gender, place of residence, and average monthly household income significantly influenced the distribution of resilience in patients with lung cancer. CONCLUSION: The resilience patterns of patients with lung cancer varied. It is suggested that health care providers screen out various types of patients with multiple levels of resilience and pay more attention to female, rural, and poor patients. Additionally, individual differences in resilience may provide an actionable means for addressing sleep problems.


Assuntos
Neoplasias Pulmonares , Testes Psicológicos , Resiliência Psicológica , Transtornos do Sono-Vigília , Humanos , Feminino , Qualidade do Sono , Transtornos do Sono-Vigília/epidemiologia , Transtornos do Sono-Vigília/etiologia
4.
J Med Internet Res ; 26: e56780, 2024 Jun 25.
Artigo em Inglês | MEDLINE | ID: mdl-38819655

RESUMO

Large language models (LLMs) such as ChatGPT have become widely applied in the field of medical research. In the process of conducting systematic reviews, similar tools can be used to expedite various steps, including defining clinical questions, performing the literature search, document screening, information extraction, and language refinement, thereby conserving resources and enhancing efficiency. However, when using LLMs, attention should be paid to transparent reporting, distinguishing between genuine and false content, and avoiding academic misconduct. In this viewpoint, we highlight the potential roles of LLMs in the creation of systematic reviews and meta-analyses, elucidating their advantages, limitations, and future research directions, aiming to provide insights and guidance for authors planning systematic reviews and meta-analyses.


Assuntos
Metanálise como Assunto , Literatura de Revisão como Assunto , Idioma , Humanos
5.
Reprod Biomed Online ; 46(2): 225-233, 2023 02.
Artigo em Inglês | MEDLINE | ID: mdl-36396534

RESUMO

RESEARCH QUESTION: What is the molecular function of hsa_circ_0001550 in decidualization? DESIGN: Human endometrial stromal cells (HESC) were isolated from the endometrium tissues to build an in-vitro decidualization model. Different concentrations of medroxyprogesterone acetate (MPA) were used to observe whether the expression level of hsa_circ_0001550 was related to progesterone. Biological characteristics and distribution of hsa_circ_0001550 were determined by RNase R, actinomycin D (Act D) assay and cytoplasmic/nuclear fraction assay. Then the overexpression of hsa_circ_0001550 was achieved by adenovirus vector. Cell proliferation was determined by Cell Counting Kit-8 (CCK-8) assays. The cell cycle was assessed by flow cytometry analyses. Cell apoptosis was determined by annexin-V/propidium iodide double staining experiment and western blotting. RESULTS: The expression of hsa_circ_0001550 was decreased in decidua and decidualized HESC (P < 0.001, P = 0.014). Hsa_circ_0001550 is a covalently closed RNA molecule that was verified by RNase R assay and Act D assay (P = 0.012). Nuclear and cytoplasmic separation experiments confirmed that hsa_circ_0001550 was mainly distributed in the cytoplasm. Overexpression of hsa_circ_0001550 inhibited decidualization of HESC (P < 0.0001). Furthermore, overexpression of hsa_circ_0001550 inhibited proliferation by decreasing the number of S phase cells (P = 0.033). Annexin-V/propidium iodide double staining experiment and western blotting revealed that overexpression of hsa_circ_0001550 promoted HESC apoptosis (P < 0.001, P = 0.0139). CONCLUSIONS: Hsa_circ_0001550 impairs decidualization of HESC. Progesterone decreases the expression of hsa_circ_0001550. The results may provide new insights into the cause of decidualization.


Assuntos
Decídua , MicroRNAs , RNA Circular , Feminino , Humanos , Anexinas/metabolismo , Apoptose , Proliferação de Células , Decídua/metabolismo , Endométrio/metabolismo , MicroRNAs/metabolismo , Progesterona/farmacologia , Progesterona/metabolismo , Propídio/metabolismo , Células Estromais/metabolismo , RNA Circular/metabolismo , Implantação do Embrião
6.
Beijing Da Xue Xue Bao Yi Xue Ban ; 55(6): 1007-1012, 2023 Dec 18.
Artigo em Zh | MEDLINE | ID: mdl-38101781

RESUMO

OBJECTIVE: To investigate the predictive value of blood cell ratios and inflammatory markers for adverse prognosis in patients with primary Sjögren's syndrome (PSS) combined with coronavirus disease 2019 (COVID-19). METHODS: We retrospectively collected clinical data from 80 patients with PSS and COVID-19 who visited the Rheumatology and Immunology Department of the First Affiliated Hospital of Nanchang University from December 2022 to February 2023. Inclusion criteria were (1) meeting the American College of Rheumatology (ACR) classification criteria for Sjögren's syndrome; (2) confirmed diagnosis of COVID-19 by real-time reverse transcription polymerase chain reaction or antigen testing for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2); (3) availability of necessary clinical data; (4) age > 18 years. According to the clinical classification criteria of the "Diagnosis and Treatment Protocol for Novel Coronavirus Pneumonia (trial the 10th Revised Edition)", the patients were divided into the mild and severe groups. Disease activity in primary Sjögren' s syndrome was assessed using the European League Against Rheumatism (EULAR) Sjögren' s syndrome disease activity index (ESSDAI). Platelet-lymphocyte ratio (PLR), C-reactive protein-lymphocyte ratio (CLR), erythrocyte sedimentation rate (ESR), C-reactive protein (CRP), and other laboratory data were compared between the two groups within 24-72 hours post-infection. RESULTS: The mild group consisted of 66 cases with an average age of (51. 52±13. 16) years, and the severe group consisted of 14 cases with an average age of (52.64±10.20) years. Disease activity, CRP, platelets, PLR, and CLR were significantly higher in the severe group compared with the mild group (P < 0.05). Univariate analysis using age, disease activity, CRP, platelets, PLR, and CLR as independent variables indicated that disease activity, CRP, PLR, and CLR were correlated with the severity of COVID-19 (P < 0.05). Multivariate logistic regression analysis further confirmed that PLR (OR=1.016, P < 0.05) and CLR (OR=1.504, P < 0.05) were independent risk factors for the severity of COVID-19 in the critically ill patients. Receiver operator characteristic (ROC) curve analysis showed that the area under the curve (AUC) for PLR and CLR was 0.708 (95%CI: 0.588-0.828) and 0.725 (95%CI: 0.578-0.871), respectively. The sensitivity for PLR and CLR was 0.429 and 0.803, respectively, while the highest specificity was 0.714 and 0.758, respectively. The optimal cutoff values for PLR and CLR were 166.214 and 0.870, respectively. CONCLUSION: PLR and CLR, particularly the latter, may serve as simple and effective indicators for predicting the prognosis of patients with PSS and COVID-19.


Assuntos
COVID-19 , Síndrome de Sjogren , Humanos , Adulto , Pessoa de Meia-Idade , Síndrome de Sjogren/complicações , Síndrome de Sjogren/diagnóstico , Estudos Retrospectivos , Proteína C-Reativa , SARS-CoV-2
7.
Zhongguo Zhong Yao Za Zhi ; 48(16): 4320-4327, 2023 Aug.
Artigo em Zh | MEDLINE | ID: mdl-37802858

RESUMO

With the development of imaging technology and artificial intelligence, hyperspectral imaging technology provides a fast, non-destructive, intelligent, and precise new method for the analysis of Chinese materia medica(CMM). This paper summarized the methods and applications of hyperspectral imaging technology combined with intelligent analysis technology in the field of CMM in recent years, focusing on the acquisition and preprocessing of hyperspectral data, intelligent analysis methods of hyperspectral data, and practical cases of these technologies in the field of CMM. Hyperspectral data of CMM can provide spectral information with nanometer-level resolution and rich spatial texture information simultaneously. This paper summarized the acquisition process, including black-and-white board calibration and region-of-interest extraction, and preprocessing methods including smoothing, differentiation, scale-space, and scattering correction. The feature extraction methods in terms of spectral, spatial, color, and texture were briefly described, and common modeling methods were summarized. Finally, this paper reviewed the research cases of the application of the above methods to the fields of CMM, such as authenticity identification, origin tracing, variety recognition, year identification, sulfur fumigation degree determination, and quantitative measurement.


Assuntos
Medicamentos de Ervas Chinesas , Materia Medica , Humanos , Inteligência Artificial , Imageamento Hiperespectral , Medicina Tradicional Chinesa , Tecnologia
8.
Opt Lett ; 47(22): 5813-5816, 2022 Nov 15.
Artigo em Inglês | MEDLINE | ID: mdl-37219110

RESUMO

An exact modal decomposition method plays an important role in revealing the modal characteristics of a few-mode fiber, and it is widely used in various applications ranging from imaging to telecommunications. Here, ptychography technology is successfully used to achieve modal decomposition of a few-mode fiber. In our method, the complex amplitude information of the test fiber can be recovered by ptychography, and then the amplitude weight of each eigenmode and the relative phase between different eigenmodes can be easily calculated by modal orthogonal projection operations. In addition, we also propose a simple and effective method to realize coordinate alignment. Numerical simulations and optical experiments validate the reliability and feasibility of the approach.

9.
J Adv Nurs ; 78(10): 3069-3082, 2022 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-35696315

RESUMO

AIM: To evaluate the effectiveness of psychological interventions in reducing fear of cancer recurrence in breast cancer survivors. DESIGN: A systematic review and meta-analysis. DATA SOURCES: PubMed, Embase, Cochrane Central Register of Controlled Trials, CINAHL, Scopus, PsycINFO, Web of Science and ClinicalTrials.gov were searched for relevant studies published from 1 January 1976 to 28 November 2020. METHODS: Eligible randomized controlled trials on psychological interventions for reducing fear of cancer recurrence in breast cancer survivors were included in meta-analysis. Review Manager 5.4 was used to conduct the meta-analysis, and the fear of cancer recurrence score was calculated by using standardized mean differences and 95% confidence intervals. Risk of bias was assessed with the Cochrane risk-of-bias tool. Quality of evidence, sensitivity analyses, and subgroup analyses were also conducted. RESULTS: This systematic review included 16 randomized controlled trials. We found psychological interventions significantly reduced fear of cancer recurrence. Subgroup analyses indicated that mindfulness and acceptance therapy-based interventions reduced fear of cancer recurrence, whereas cognitive-behavioural therapy combined with psychoeducation did not. Interventions with three to eight sessions were effective, while interventions with nine or more sessions were not. Face-to-face interventions were effective, whereas online interventions were not. The quality of evidence for fear of cancer recurrence was evaluated as moderate due to moderate heterogeneity in the included studies. CONCLUSIONS: Psychological interventions were effective in reducing fear of cancer recurrence in breast cancer survivors. Mindfulness and acceptance therapy-based interventions and short-term interventions are recommended. Future well-designed randomized controlled trials aiming to examine the effectiveness of psychological interventions in reducing fear of cancer recurrence are needed. IMPACT: The findings of this systematic review may guide the development of psychological interventions and encourage the use of psychological interventions for reducing fear of cancer recurrence in breast cancer survivors.


Assuntos
Neoplasias da Mama , Sobreviventes de Câncer , Neoplasias da Mama/psicologia , Neoplasias da Mama/terapia , Medo , Feminino , Humanos , Intervenção Psicossocial , Qualidade de Vida
10.
Opt Express ; 26(18): 22603-22614, 2018 Sep 03.
Artigo em Inglês | MEDLINE | ID: mdl-30184918

RESUMO

It is well known that in-line digital holography (DH) makes use of the full pixel count in forming the holographic imaging. But it usually requires phase-shifting or phase retrieval techniques to remove the zero-order and twin-image terms, resulting in the so-called two-step reconstruction process, i.e., phase recovery and focusing. Here, we propose a one-step end-to-end learning-based method for in-line holography reconstruction, namely, the eHoloNet, which can reconstruct the object wavefront directly from a single-shot in-line digital hologram. In addition, the proposed learning-based DH technique has strong robustness to the change of optical path difference between reference beam and object light and does not require the reference beam to be a plane or spherical wave.

11.
Appl Opt ; 56(13): F152-F157, 2017 May 01.
Artigo em Inglês | MEDLINE | ID: mdl-28463310

RESUMO

Typical methods of automatic estimation of focusing in digital holography calculate every single reconstructed frame to get a critical function and then ascertain the focal plane by finding the extreme value of that function. Here, we propose a digital holographic autofocusing method that computes the focused distance using the first longitudinal difference of the magnitude of the reconstructed image. We demonstrate the proposed method with both numerical simulations and optical experiments of amplitude-contrast and phase-contrast objects. The results suggest that the proposed method performs better than other existing methods, in terms of applicability and computation efficiency, with potential applications in industrial and biomedical inspections where automatic focus tracking is necessary.

12.
China CDC Wkly ; 6(14): 289-293, 2024 Apr 05.
Artigo em Inglês | MEDLINE | ID: mdl-38634103

RESUMO

What is already known about this topic?: To protect the health of young people from the harmful impacts of electronic cigarettes (e-cigarettes), China has enacted various policies and regulations since 2018. As of October 1, 2022, the Electronic Cigarette Management Measures were put into action. They prohibited the sale of flavored e-cigarettes, permitting only those of plain tobacco flavor to be sold. What is added by this report?: The illegal market for flavored e-cigarettes, often disguised as milk tea cups, cola cans, and violent bear images, continues to flourish. There is an increased need to bolster support for the prohibition of flavored e-cigarettes and enhance public awareness of associated regulations. What are the implications for public health practice?: To advance the health of China's youth, it is crucial to improve the implementation and understanding of e-cigarette policies and guidelines.

13.
Colloids Surf B Biointerfaces ; 234: 113699, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-38113750

RESUMO

The hypoxia tumor microenvironment and low radiation attenuation coefficient of tumor tissue usually limit the efficiency of radiotherapy. In this study, a two-dimensional multifunctional nano-sensitizer, CuNS@Pt, was prepared to function as a radiosensitizer, enhancing radiotherapy through multiple mechanisms. Numerous active sites were provided for the deposition of X-ray radiation energy by the in-situ chemical reduction of Pt to create functional hybrids on Cu-based nanosheets. CuNS@Pt catalyzed high concentration of endogenous hydrogen peroxide to generate oxygen in tumor microenvironment, alleviating the physiological environment of hypoxic tumors. Additionally, CuNS could reduce the content of intrinsic glutathione (GSH) and catalyze hydrogen peroxide to form hydroxyl radicals (·OH). The generated ·OH could damage mitochondria and destroy redox homeostasis due to the functional inclusion of Cu species, thereby achieving chemodynamic therapy and further improving the radiation effect. Both in vivo and in vitro experiments showed that the nano sensitizer effectively improved the therapeutic efficiency of radiotherapy and had good biological safety. All in all, this study provides a pragmatic and doable platform for maximizing the efficacy of RT in cancer. This study also highlights the future research value of two-dimensional nanomaterials.


Assuntos
Neoplasias , Radiossensibilizantes , Humanos , Peróxido de Hidrogênio , Radiossensibilizantes/farmacologia , Catálise , Glutationa , Radical Hidroxila , Hipóxia , Microambiente Tumoral , Neoplasias/tratamento farmacológico , Neoplasias/radioterapia
14.
World J Stem Cells ; 16(5): 560-574, 2024 May 26.
Artigo em Inglês | MEDLINE | ID: mdl-38817327

RESUMO

BACKGROUND: Alveolar bone defects caused by inflammation are an urgent issue in oral implant surgery that must be solved. Regulating the various phenotypes of macrophages to enhance the inflammatory environment can significantly affect the progression of diseases and tissue engineering repair process. AIM: To assess the influence of interleukin-10 (IL-10) on the osteogenic differentiation of bone marrow mesenchymal stem cells (BMSCs) following their interaction with macrophages in an inflammatory environment. METHODS: IL-10 modulates the differentiation of peritoneal macrophages in Wistar rats in an inflammatory environment. In this study, we investigated its impact on the proliferation, migration, and osteogenesis of BMSCs. The expression levels of signal transducer and activator of transcription 3 (STAT3) and its activated form, phosphorylated-STAT3, were examined in IL-10-stimulated macrophages. Subsequently, a specific STAT3 signaling inhibitor was used to impede STAT3 signal activation to further investigate the role of STAT3 signaling. RESULTS: IL-10-stimulated macrophages underwent polarization to the M2 type through substitution, and these M2 macrophages actively facilitated the osteogenic differentiation of BMSCs. Mechanistically, STAT3 signaling plays a crucial role in the process by which IL-10 influences macrophages. Specifically, IL-10 stimulated the activation of the STAT3 signaling pathway and reduced the macrophage inflammatory response, as evidenced by its diminished impact on the osteogenic differentiation of BMSCs. CONCLUSION: Stimulating macrophages with IL-10 proved effective in improving the inflammatory environment and promoting the osteogenic differentiation of BMSCs. The IL-10/STAT3 signaling pathway has emerged as a key regulator in the macrophage-mediated control of BMSCs' osteogenic differentiation.

15.
Aging (Albany NY) ; 16(9): 7683-7703, 2024 04 26.
Artigo em Inglês | MEDLINE | ID: mdl-38683121

RESUMO

Ferroptosis, an iron-triggered modality of cellular death, has been reported to closely relate to human aging progression and aging-related diseases. However, the involvement of ferroptosis in the development and maintenance of senescent cells still remains elusive. Here, we established a doxorubicin-induced senescent HSkM cell model and found that both iron accumulation and lipid peroxidation increase in senescent cells. Moreover, such iron overload in senescent cells has changed the expression panel of the ferroptosis-response proteins. Interestingly, the iron accumulation and lipid peroxidation does not trigger ferroptosis-induced cell death. Oppositely, senescent cells manifest resistance to the ferroptosis inducers, compared to the proliferating cells. To further investigate the mechanism of ferroptosis-resistance for senescent cells, we traced the iron flux in cell and found iron arrested in lysosome. Moreover, disruption of lysosome functions by chloroquine and LLOMe dramatically triggered the senescent cell death. Besides, the ferroitinophagy-related proteins FTH1/FTL and NCOA4 knockdown also increases the senescent cell death. Thus, we speculated that iron retardation in lysosome of senescent cells is the key mechanism for ferroptosis resistance. And the lysosome is a promising target for senolytic drugs to selectively clear senescent cells and alleviate the aging related diseases.


Assuntos
Senescência Celular , Ferroptose , Ferro , Lisossomos , Ferroptose/efeitos dos fármacos , Humanos , Senescência Celular/efeitos dos fármacos , Senescência Celular/fisiologia , Lisossomos/metabolismo , Lisossomos/efeitos dos fármacos , Ferro/metabolismo , Peroxidação de Lipídeos/efeitos dos fármacos , Doxorrubicina/farmacologia , Coativadores de Receptor Nuclear/metabolismo , Coativadores de Receptor Nuclear/genética , Linhagem Celular , Cloroquina/farmacologia , Sobrecarga de Ferro/metabolismo , Ferritinas , Oxirredutases
16.
Int J Nanomedicine ; 19: 403-414, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38250189

RESUMO

Background: Radiotherapy is an indispensable part of the multidisciplinary treatment of breast cancer (BC). Due to the potential for serious side effects from ionizing radiation in the treatment of breast cancer, which can adversely affect the patient's quality of life, the radiation dose is often limited. This limitation can result in an incomplete eradication of tumors. Methods: In this study, biomimetic copper single-atom catalysts (platelet cell membrane camouflaging, PC) were synthesized with the aim of improving the therapeutic outcomes of radiotherapy for BC. Following guidance to the tumor site facilitated by the platelet cell membrane coating, PC releases a copper single-atom nanozyme (SAzyme). This SAzyme enhances therapeutic effects by generating reactive oxygen species from H2O2 and concurrently inhibiting the self-repair mechanisms of cancer cells through the consumption of intracellular glutathione (GSH) within the tumor microenvironment. PC-augmented radiotherapy induces immunogenic cell death, which triggers an immune response to eradicate tumors. Results: With the excellent biocompatibility, PC exhibited precise tumor-targeting capabilities. Furthermore, when employed in conjunction with radiotherapy, PC showed impressive tumor elimination results through immunological activation. Remarkably, the tumor suppression rate achieved with PC-enhanced radiotherapy reached an impressive 93.6%. Conclusion: Therefore, PC presents an innovative approach for designing radiosensitizers with tumor-specific targeting capabilities, aiming to enhance the therapeutic impact of radiotherapy on BC.


Assuntos
Neoplasias da Mama , Radioimunoterapia , Humanos , Feminino , Cobre/farmacologia , Peróxido de Hidrogênio , Qualidade de Vida , Neoplasias da Mama/radioterapia , Glutationa , Microambiente Tumoral
17.
ACS Nano ; 2024 Jul 24.
Artigo em Inglês | MEDLINE | ID: mdl-39046933

RESUMO

The self-renewal and differentiation properties of cancer stem cells (CSCs) result in chemoresistance in breast cancer. Even though numerous drugs have been developed to target CSCs, they have suffered from inefficient delivery and accumulation at the focal site. Here, a thermoresponsive hydrogel is developed by coencapsulating aggregation-induced emission (AIE)-active photothermal agent and thioridazine (THZ), demonstrating a controllable delivery system triggered by the AIE agent to augment THZ-mediated CSC ablation. Upon near-infrared laser stimuli, the photothermal effect from the AIE agent induces hydrogel deformation for burst drug release. The precise in situ tumor administration of the hydrogel accelerates drug diffusion and accumulation in deep breast cancer lesions. Thus, THZ can invade tumors and provoke massive CSC apoptosis via dopamine receptor blockage and oxidative stress induction. Consequently, effective CSC inhibition and significant suppression of tumor recurrence and metastasis are demonstrated in mice with breast cancer. We believe that this intelligent hydrogel-based delivery system represents a promising treatment strategy for metastatic breast cancer with clinical potential.

18.
Eur J Oncol Nurs ; 66: 102360, 2023 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-37499406

RESUMO

PURPOSE: To examine the supportive care needs of breast cancer survivors with nonclinical, subclinical, or clinical fear of cancer recurrence. METHODS: In this cross-sectional study, 385 breast cancer survivors consented and completed a set of online questionnaires. Supportive care needs were assessed by using the 34-item Supportive Care Needs Survey. Fear of cancer recurrence was assessed by using the Fear of Cancer Recurrence Inventory. RESULTS: One hundred eighty-four (47.8%) participants reported nonclinical fear of cancer recurrence, 147 (38.2%) reported subclinical fear of cancer recurrence, and 54 (14.0%) reported clinical fear of cancer recurrence. Higher levels of fear of cancer recurrence were associated with higher levels of supportive care needs in five domains (ß = 0.30-0.60, P < 0.001) after adjusting for places of residence, education, motherhood, and time since diagnosis. Among participants with nonclinical fears of cancer recurrence, the most common needs were in the 'Health care system/Information' domain (50.5%). Among participants with subclinical or clinical fear of cancer recurrence, the most common needs were in the 'Psychological' domain (85.7% and 96.3%, respectively). CONCLUSION: Fear of cancer recurrence was associated with supportive care needs. The most common needs among participants with subclinical or clinical fears of cancer recurrence were psychological needs.


Assuntos
Neoplasias da Mama , Sobreviventes de Câncer , Humanos , Feminino , Neoplasias da Mama/terapia , Neoplasias da Mama/psicologia , Sobreviventes de Câncer/psicologia , Estudos Transversais , Recidiva Local de Neoplasia/epidemiologia , Recidiva Local de Neoplasia/psicologia , Medo/psicologia , Inquéritos e Questionários
19.
Int J Nanomedicine ; 18: 6869-6882, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-38026515

RESUMO

Background: Photothermal therapy (PTT) has gained considerable interest as an emerging modality for cancer treatment in recent years. Radiation therapy (RT) has been widely used in the clinic as a traditional treatment method. However, RT and PTT treatments are limited by side effects and penetration depth, respectively. In addition, hypoxia within the tumor can lead to increased resistance to treatment. Methods: We synthesized multiple sizes of AuPt by modulating the reaction conditions. The smallest size of AuPt was selected and modified with folic acid (FA) for PTT and RT synergy therapy. Various methods including transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FITR) are used to determine the structure and composition of AuPt-FA (AF). In addition, we researched the photothermal properties of AF with IR cameras and infrared lasers. Flow cytometry, colony formation assays, CCK8, and fluorescent staining for probing the treatment effect in vitro. Also, we explored the targeting of AF by TEM and In Vivo Imaging Systems (IVIS). In vivo experiments, we record changes in tumor volume and weight as well as staining of tumor sections (ROS, Ki67, and hematoxylin and eosin). Results: The AuPt with particle size of 16 nm endows it with remarkably high photothermal conversion efficiency (46.84%) and catalase activity compared to other sizes of AuPt (30 nm and 100 nm). AF alleviates hypoxia in the tumor microenvironment, leading to the production of more reactive oxygen species (ROS) during the treatment. In addition, the therapeutic effect was significantly enhanced by combining RT and PTT, with an apoptosis rate of 81.1% in vitro and an in vivo tumor volume reduction rate of 94.0% in vivo. Conclusion: These results demonstrate that AF potentiates the synergistic effect of PTT and RT and has the potential for clinical translation.


Assuntos
Nanopartículas Multifuncionais , Nanopartículas , Neoplasias , Humanos , Espécies Reativas de Oxigênio , Fototerapia/métodos , Neoplasias/terapia , Hipóxia , Nanopartículas/química , Linhagem Celular Tumoral , Microambiente Tumoral
20.
Int J Nurs Stud ; 140: 104447, 2023 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-36796118

RESUMO

BACKGROUND: Lung cancer is one of the most common cancers and poses a physical and psychological threat to patients. Mindfulness-based interventions are emerging forms of psychotherapy that are effective in improving physical and psychological symptoms, but no review has summarized their effectiveness on anxiety, depression, and fatigue in people with lung cancer. OBJECTIVES: To evaluate the effectiveness of mindfulness-based interventions in reducing anxiety, depression, and fatigue in people with lung cancer. DESIGN: Systematic review and meta-analysis. METHODS: We searched the PubMed, Web of Science, Embase, China Biology Medicine disc, Wanfang Data, China National Knowledge Infrastructure, and China Science and Technology Journal databases from inception to 13 April 2022. Eligible studies included randomized controlled trials of people with lung cancer receiving mindfulness-based interventions reporting on the outcomes of anxiety, depression, and fatigue. Two researchers independently reviewed the abstracts and full texts, extracted the data and assessed the risk of bias independently by using the Cochrane 'Risk of bias assessment tool'. The meta-analysis was performed by using Review Manager 5.4, and the effect size was calculated by the standardized mean difference and its 95% confidence interval. RESULTS: The systematic review included 25 studies (2420 participants), whereas the meta-analysis included 18 studies (1731 participants). Mindfulness-based interventions significantly decreased levels of anxiety [standardized mean difference = -1.15, 95% confidence interval (-1.36, -0.94), Z = 10.75, P < 0.001], depression [standardized mean difference = -1.04, 95% confidence interval (-1.60, -0.48), Z = 3.66, P < 0.001], and fatigue [standardized mean difference = -1.29, 95% confidence interval (-1.66, -0.91), Z = 6.79, P < 0.001]. The subgroup analysis indicated that programs lasting less than eight weeks in length with structured intervention components (e.g., mindfulness-based stress reduction and mindfulness-based cognitive therapy) and 45 min of daily home practice implemented in patients with advanced stage lung cancer showed better effects than programs lasting more than eight weeks in length with less structured components and more than 45 min of daily home practice implemented in patients with mixed stage lung cancer. The overall quality of the evidence was low due to the lack of allocation concealment and blinding and the high risk of bias in most studies (80%). CONCLUSIONS: Mindfulness-based interventions might be effective in reducing anxiety, depression, and fatigue in people with lung cancer. However, we cannot draw definitive conclusions because the overall quality of the evidence was low. More rigorous studies are needed to confirm the effectiveness and examine which intervention components may be most effective for improved outcomes.


Assuntos
Neoplasias Pulmonares , Atenção Plena , Humanos , Ansiedade/terapia , Depressão/terapia , Fadiga/terapia , Fadiga/etiologia , Neoplasias Pulmonares/complicações , Neoplasias Pulmonares/terapia , Qualidade de Vida
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA