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1.
BMC Nurs ; 23(1): 159, 2024 Mar 05.
Artículo en Inglés | MEDLINE | ID: mdl-38443951

RESUMEN

BACKGROUND: The retention of new nurses has become a major challenge for medical institutions. Job embeddedness has been seen as a valuable lens for examining nurse turnover, but greater details about job embeddedness are rarely disclosed, especially among new nurses. This study aimed to reveal how the nursing work environment, head nurse leadership and presenteeism shape job embeddedness in this population from the perspective of conservation of resources (COR) theory. METHOD: A cross-sectional multicentre study involving 436 participants from 10 cities and 33 hospitals was conducted over 4 months. Samples were selected using a two-stage convenience sampling method. A sequential multiple mediation model performed with SPSS-PROCESS was used to analyse the relationships among the nursing work environment, head nurse leadership, presenteeism and job embeddedness. RESULTS: The nursing work environment not only directly affects the job embeddedness of new nurses (ß = 0.480, p < 0.001) but also indirectly affects it through the sequential multiple mediating effects of head nurse leadership and presenteeism (R2 = 0.535, F = 82.160, p < 0.001). CONCLUSIONS: New nurses' job embeddedness needs to be improved. These results suggest that preserving adequate resources for new nurses, such as work environment resources, head nurse leadership resources, and individual productivity resources, is an effective way to shape their job embeddedness. In addition, when a certain resource is insufficient, fully considering the principles of investment and buffering between resources and providing reciprocal, alternative, or buffer resources in a timely manner are necessary to improve new nurses' job embeddedness. LARGE LANGUAGE MODELS: Large language models (LLMs), such as ChatGPT, were not used during the writing of this article. An expert native English speaker performed language revision.

3.
BMC Nurs ; 23(1): 64, 2024 Jan 24.
Artículo en Inglés | MEDLINE | ID: mdl-38267964

RESUMEN

BACKGROUND: Nursing interns often experience lots of challenges during their clinical nursing internships, which can adversely affect career decisions and result in a squandering of nursing education resources. Patient safety attitudes, professional identity and climate of caring may affect nursing interns' clinical experience. However, more evidence is requested to validate these relationships for nursing educators to develop effective education programs and facilitate interns' successful transition. METHODS: This was a cross-sectional study, which used a convenience sampling method to recruit 387 nursing interns during December 2022 to April 2023 in university affiliated hospital in Hunan province, China. Data were collected using standardized scales. Spearman correlation and multiple regression analysis were employed to examine the relationship between transition shock, patient safety attitudes, professional identity, and climate of caring. RESULTS: Nursing interns experienced transition shock at a moderate level and the highest levels of transition shock in response to overwhelming practicum workloads, with the second being related to the conflict between theory and practice. Transition shock was negatively correlated with patient safety attitudes, professional identity and climate of caring among nursing interns. CONCLUSIONS: Nursing managers and educators need to value the transition shock experienced by nursing interns. Our study suggests that developing a strong sense of professional identity and a positive attitude toward patient safety can be effective in reducing the level of transition shock among nursing interns. In addition, a caring climate within the nursing unit can significantly enhance the overall experience of nursing interns. This can be achieved by enhancing the support of clinical mentors, providing patient safety-focused education, and facilitating team communication among nurses.

4.
Int J Mol Sci ; 25(1)2024 Jan 04.
Artículo en Inglés | MEDLINE | ID: mdl-38203841

RESUMEN

The accurate prediction of binding free energy is a major challenge in structure-based drug design. Quantum mechanics (QM)-based approaches show promising potential in predicting ligand-protein binding affinity by accurately describing the behavior and structure of electrons. However, traditional QM calculations face computational limitations, hindering their practical application in drug design. Nevertheless, the fragment molecular orbital (FMO) method has gained widespread application in drug design due to its ability to reduce computational costs and achieve efficient ab initio QM calculations. Although the FMO method has demonstrated its reliability in calculating the gas phase potential energy, the binding of proteins and ligands also involves other contributing energy terms, such as solvent effects, the 'deformation energy' of a ligand's bioactive conformations, and entropy. Particularly in cases involving ionized fragments, the calculation of solvation free energy becomes particularly crucial. We conducted an evaluation of some previously reported implicit solvent methods on the same data set to assess their potential for improving the performance of the FMO method. Herein, we develop a new QM-based binding free energy calculation method called FMOScore, which enhances the performance of the FMO method. The FMOScore method incorporates linear fitting of various terms, including gas-phase potential energy, deformation energy, and solvation free energy. Compared to other widely used traditional prediction methods such as FEP+, MM/PBSA, MM/GBSA, and Autodock vina, FMOScore showed good performance in prediction accuracies. By constructing a retrospective case study, it was observed that incorporating calculations for solvation free energy and deformation energy can further enhance the precision of FMO predictions for binding affinity. Furthermore, using FMOScore-guided lead optimization against Src homology-2-containing protein tyrosine phosphatase 2 (SHP-2), we discovered a novel and potent allosteric SHP-2 inhibitor (compound 8).


Asunto(s)
Entropía , Ligandos , Reproducibilidad de los Resultados , Estudios Retrospectivos , Solventes
5.
Nurse Educ Pract ; 73: 103836, 2023 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-37984162

RESUMEN

AIM: To determine the association between the perception of a caring climate in hospitals and patient safety attitudes of nursing interns, and the multiple mediating effects of professional identity and transition shock on this relationship. BACKGROUND: Limited research has been conducted on the involvement of nursing interns in patient safety management and the direct relationship between the perception of a caring climate in hospitals and patient safety attitudes of nursing interns. Furthermore, it remains unclear whether professional identity and transition shock play significant roles as mediating factors in this relationship. DESIGN: A cross-sectional study. METHODS: This study employed a convenience sampling to recruit 356 nursing interns from 30 nursing schools in a comprehensive hospital in Hunan Province, China, between December 2022 and April 2023. Data on general information, the perception of a caring climate in hospitals, professional identity, transition shock, and patient safety attitudes was collected from nursing interns using a general information questionnaire and reliable scales. This study utilized a structural equation model with AMOS 24.0 to examine the relationship between variables. RESULTS: The perception of a caring climate in hospitals directly impacted patient safety attitudes of nursing interns (Effect = 0.253, 95% confidence interval: 0.218-0.542). Meanwhile, the perception of a caring climate in hospitals indirectly influenced patient safety attitudes of nursing interns through multiple mediating factors, including professional identity and transition shock (Effect = 0.037, 95% confidence interval: 0.017-0.073). CONCLUSION: To ensure patient safety, it is crucial to enhance patient safety attitudes of nursing interns. Our findings suggest that nursing educators and managers can enhance patient safety attitudes of nursing interns by establishing a caring climate. Professional identity and transition shock are important mediators of the patient safety attitudes. Additionally, nursing educators can implement measures to foster a positive work environment, including providing care and support to nursing interns and reducing their workload, to increase professional identity, alleviate transition shock, and ultimately enhance patient safety attitudes of nursing interns. TWEETABLE ABSTRACT: The relationship between the perception of caring climate in hospitals and patient safety attitudes of nursing interns. Professional identity and transition shock play multiple mediating roles in the relationship. #PatientSafetyAttitudes #NursingInterns #CaringClimate.


Asunto(s)
Actitud del Personal de Salud , Seguridad del Paciente , Humanos , Estudios Transversales , Hospitales , Encuestas y Cuestionarios , Percepción
6.
Nano Lett ; 23(14): 6330-6336, 2023 07 26.
Artículo en Inglés | MEDLINE | ID: mdl-37440701

RESUMEN

Membrane morphology and its dynamic adaptation regulate many cellular functions, which are often mediated by membrane proteins. Advances in DNA nanotechnology have enabled the realization of various protein-inspired structures and functions with precise control at the nanometer level, suggesting a viable tool to artificially engineer membrane morphology. In this work, we demonstrate a DNA origami cross (DOC) structure that can be anchored onto giant unilamellar vesicles (GUVs) and subsequently polymerized into micrometer-scale reconfigurable one-dimensional (1D) chains or two-dimensional (2D) lattices. Such DNA origami-based networks can be switched between left-handed (LH) and right-handed (RH) conformations by DNA fuels and exhibit potent efficacy in remodeling the membrane curvatures of GUVs. This work sheds light on designing hierarchically assembled dynamic DNA systems for the programmable modulation of synthetic cells for useful applications.


Asunto(s)
Nanoestructuras , Nanoestructuras/química , Conformación de Ácido Nucleico , Nanotecnología/métodos , ADN/química , Liposomas Unilamelares , Lípidos
7.
Biomater Sci ; 11(15): 5060-5077, 2023 Jul 25.
Artículo en Inglés | MEDLINE | ID: mdl-37260180

RESUMEN

Programmable modular reaction, combined with excellent biocompatibility, has endowed biological circuits based on the nucleic acid TMSD (toehold-mediated strand displacement) reaction with great potential for bioanalysis and biomedical research. In this review, we summarize recent research on the principles of TMSD reaction and its applications in the cell environment. Based on the basic reaction units of the TD (toehold displacement) reaction, TE (toehold exchange) reaction, and CD (cooperation displacement) reaction, different reaction models could be obtained through the recombination of the basic reaction units. We highlight the successful development of the application of TMSD reaction for cell recognition, targeted therapy, molecular sensing and imaging and gene manipulations in the cell environment. Finally, we discuss the challenges and future opportunities of TMSD reaction for cellular applications.


Asunto(s)
Investigación Biomédica , Ácidos Nucleicos
8.
Front Oncol ; 13: 1136876, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37342187

RESUMEN

Background: Gallbladder inflammatory pseudotumor (GIPT) is a nonspecific chronic proliferative inflammation of the gallbladder. At present, the pathogenesis is not clear, which may be related to bacterial and viral infections, congenital diseases, gallstones, chronic cholangitis and so on. GIPT is rare and the imaging examination has no obvious specificity. There are few reports on the 18F-FDG PET/CT imaging characteristics of GIPT. In this paper, 18F-FDG PET/CT findings of GIPT with elevated CA199 are reported and the literature is reviewed. Case description: A 69-year-old female patient presented with recurrent intermittent right upper abdominal pain for more than 1 year, followed by nausea and vomiting for 3 hours, without fever, dizziness, chest tightness and other symptoms. Complete CT, MRI, PET/CT and related laboratory tests, CEA (-), AFP (-), Ca199 224.50U/mL ↑,18F-FDG PET/CT images showed uneven thickening at the bottom of the gallbladder, slightly increased gallbladder volume, eccentric and localized thickening of the gallbladder body wall, nodular soft tissue density shadow, clear boundary, smooth gallbladder wall, presence and smooth hepatobiliary interface, increased FDG radioactivity uptake, SUVmax was 10.2.The tumor was resected after operation and was diagnosed as gallbladder inflammatory pseudotumor by postoperative pathology. Conclusion: 18F-FDGPET/CT imaging has a certain significance for gallbladder inflammatory pseudotumor. In patients with chronic cholecystitis, when the CA199 increases, the gallbladder wall appears localized thickening, the hepatobiliary interface exists and is smooth, and the 18F-FDG metabolism is mildly to moderately increase. Gallbladder cancer cannot be diagnosed alone, and the possibility of gallbladder inflammatory pseudotumor should also be considered. However, it should be noted that the cases with unclear diagnosis should still be actively treated with surgery, so as not to delay the treatment opportunity.

9.
Support Care Cancer ; 31(5): 297, 2023 Apr 25.
Artículo en Inglés | MEDLINE | ID: mdl-37097532

RESUMEN

BACKGROUND: During chemotherapy for multiple myeloma, symptoms include those related to the disease, as well as adverse effects of the treatment. Few studies have explored the relationships between these symptoms. Network analysis could identify the core symptom in the symptom network. OBJECTIVE: The aim of this study was to explore the core symptom in multiple myeloma patients undergoing chemotherapy. METHODS: This was a cross-sectional study in which sequential sampling was used to recruit 177 participants from Hunan, China. Demographic and clinical characteristics were surveyed using a self-developed instrument. The symptoms of chemotherapy-treated multiple myeloma, including pain, fatigue, worry, nausea, and vomiting, were measured using a questionnaire with good reliability and validity. The mean ± SD, frequency, and percentages were used as descriptive statistics. Network analysis was used to estimate the correlation between symptoms. RESULTS: The results showed that 70% of multiple myeloma patients using chemotherapy exhibited pain. In the network analysis, worrying was the dominant symptom, and the strongest relationship was between nausea and vomiting in chemotherapy-treated multiple myeloma patients' symptoms. CONCLUSION: Worrying is the core symptom of multiple myeloma patients. Interventions could be most effective if there is a symptom management focus on worrying when providing care to chemotherapy-treated multiple myeloma patients. Nausea combined with vomiting could be better managed, which would decrease the cost of health care. Understanding the relationship between the symptoms of multiple myeloma patients undergoing chemotherapy is beneficial for precise symptom management. IMPLICATIONS FOR PRACTICE: Nurses and health care teams should be a priority to intervene in the worrying for chemotherapy-treated multiple myeloma patients to maximize the effectiveness of an intervention. Except, nausea and vomiting should be managed together in a clinical setting.


Asunto(s)
Mieloma Múltiple , Humanos , Mieloma Múltiple/tratamiento farmacológico , Estudios Transversales , Reproducibilidad de los Resultados , Náusea/inducido químicamente , Náusea/tratamiento farmacológico , Vómitos/inducido químicamente , Vómitos/tratamiento farmacológico , Dolor
10.
Org Biomol Chem ; 21(7): 1395-1398, 2023 02 15.
Artículo en Inglés | MEDLINE | ID: mdl-36688572

RESUMEN

Herein, we presented a simple approach for C-H oxidation in the C23 or/and C24 of ursane triterpenoids without any protection of a Δ12,13 double bond. As a result, from commercial ursolic acid (UA), six naturally occurring ursane triterpenoids were synthesized in overall yields of 3.4% to 36.8%, which implied the importance of this approach for the derivation of natural products and their application in biological activity.


Asunto(s)
Productos Biológicos , Triterpenos , Triterpenos/farmacología , Triterpenos/química , Triterpenos Pentacíclicos , Productos Biológicos/química
11.
Front Oncol ; 13: 1309123, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-38264744

RESUMEN

Background: Synovial sarcoma is a malignant tumor of mesenchymal origin with a high degree of malignancy and easy metastasis. It mostly occurs in distal extremities or adjacent joints, and it is most common in deep knee joint. Primary sacral synovial sarcoma (PSSS) is extremely rare. The PET/CT imaging findings of a case of monophasic PSSS were reported. The clinical, imaging, and pathological data were summarized, and the literature was reviewed. Case description: A 67-year-old female patient presented with sacrococcygeal pain without obvious causes on 16 September 2022, with occasional pain at night, as well as aggravated pain during hip flexion and long-distance walking, which could be slightly relieved with rest, without special treatment. For further treatment before 1 month to Jiangxi Provincial People's Hospital, after admission, laboratory tests were negative. Non-contrast CT scan showed expansive bone destruction in the S1-3 vertebrae with soft tissue density of about 58 mm × 46 mm × 52 mm. The boundary was clear, necrosis was visible within the vertebrae, and the boundary between the mass and the anterior sacral blood vessels and rectum was unclear. Non-contrast MRI scan showed mixed signals in lumbosacral masses, with equal signals in T1 and uneven and slightly higher signals in T2. Cystic degeneration and necrosis were visible, with multiple compartments in the lumbosacral masses. MRI enhancement showed uneven enhancement of lumbosacral mass with multiple compartments and no enhanced cystic lesion. The left sacral alar bone is destroyed, as shown by large flaky uneven strengthening. PET/CT showed that S1-3 vertebral body and left sacral alar bone were destroyed and soft tissue shadow formed, invading the sacral canal and the left foramina of S1-3. FDG metabolism was significantly increased, and malignant tumor was diagnosed by PET/CT. Pathological examination: The pathological diagnosis was monophasic PSSS. After systemic chemotherapy and local radiotherapy, no significant signs of recurrence and metastasis were found on CT so far. Follow-up treatment was continued. Conclusion: The incidence of PSSS is very low, its clinical and imaging manifestations lack characteristics, and the final diagnosis still needs pathology. PET/CT imaging has a certain value in the diagnosis of PSSS and has great application value in the preoperative staging, postoperative efficacy evaluation, and follow-up.

12.
Nurse Educ Pract ; 65: 103479, 2022 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-36327593

RESUMEN

AIM: To explore the associated factors of patient privacy protection behaviours among nursing interns. BACKGROUND: The patient privacy protection behaviours of nursing interns are closely related to information security incidents and the quality of clinical practice. However, little is known about the associated factors of patient privacy protection behaviours among nursing interns. DESIGN: A cross-sectional study. SETTING: A comprehensive hospital in Hunan Province, China. PARTICIPANTS: Nursing interns in a comprehensive hospital from 30 different nursing schools were recruited using convenience sampling. METHODS: Data on general information, patient privacy protection cognition, moral sensitivity, empathy and patient privacy protection behaviours were collected with a general information questionnaire and corresponding scales with good psychometric properties. U-test, spearman correlation analysis and multiple linear regression were used to determine the associated factors of patient privacy protection behaviours among nursing interns. RESULTS: This study showed that nursing interns in a college programme had better patient privacy protection behaviours than those nursing interns in a baccalaureate programme. Nursing interns who have more knowledge of privacy laws and whose clinical nursing teachers excelled in patient privacy protection might show better patient privacy protection behaviours. Nursing interns with better patient privacy protection cognition, higher moral sensitivity and greater empathy might have better patient privacy protection behaviours. CONCLUSION: Strengthening nursing interns' knowledge of privacy laws and patient privacy protection cognition, improving their moral sensitivity and empathy and standardising the patient privacy protection behaviours of clinical nursing teachers may can improve the patient privacy protection behaviours of nursing interns. Also, clinical teachers should pay close attention to nursing interns in baccalaureate programmes who are likely to have a lower level of patient privacy protection behaviours and act as role models for them in protecting patient privacy in clinical nursing education.


Asunto(s)
Estudiantes de Enfermería , Humanos , Estudios Transversales , Privacidad , Psicometría , Encuestas y Cuestionarios , China
13.
Pharmacol Res ; 185: 106477, 2022 11.
Artículo en Inglés | MEDLINE | ID: mdl-36191880

RESUMEN

Receptor expression-enhancing proteins (REEPs) are an evolutionarily conserved protein family that is pivotal to the structure and function of the endoplasmic reticulum (ER). The REEP family can be classified into two major subfamilies in higher species, the REEP1-4 and REEP5-6 subfamilies. Within the REEP1-4 subfamily, REEP1 and REEP2 are closely related, and REEP3 and REEP4 are similarly related. The REEP family is widely distributed in various tissues. Recent studies indicate that the REEP family is involved in many pathological and physiological processes, such as ER morphogenesis and remodeling, microtubule cytoskeleton regulation, and the trafficking and expression of G protein-coupled receptors (GPCRs). Moreover, the REEP family plays crucial roles in the occurrence and development of many diseases, including neurological diseases, diabetes, retinal diseases, cardiac diseases, infertility, obesity, oligoarticular juvenile idiopathic arthritis (OJIA), COVID-19, and cancer. In the present review, we describe the distribution and structure of the REEP family. Furthermore, we summarize the functions and the associated diseases of this family. Based on the pleiotropic actions of the REEP family, the study of its family members is crucial to understanding the relevant pathophysiological processes and developing strategies to modulate and control these related diseases.


Asunto(s)
COVID-19 , Humanos , Retículo Endoplásmico/metabolismo , Proteínas Portadoras/metabolismo , Receptores Acoplados a Proteínas G/metabolismo , Citoesqueleto/metabolismo , Proteínas de Transporte de Membrana/metabolismo
14.
BMC Nurs ; 21(1): 200, 2022 Jul 25.
Artículo en Inglés | MEDLINE | ID: mdl-35879704

RESUMEN

BACKGROUND: Improving the professional identity of nursing intern is significant for enhancing the number of new registered nurses and easing the shortage of nursing personnel. The clinical internship is a key period for the formulation of professional identity. However, we know little about the factors influencing the nursing interns' professional identity during clinical internship. Therefore, this study explore the influencing factors of nursing interns' professional identity during clinical internship. This study will provide evidence and suggestions for generating effective strategies contributing to professional identity improvement of nursing interns. METHODS: This was a cross-sectional study. The convenience sampling was used to recruit 398 nursing interns from a teaching hospital in Hunan, China. The demographic characteristics information was collected by a self-developed questionnaire. The nursing interns' professional identity and potential influencing factors (e.g., work atmosphere, teacher capacity) were measured by questionnaires with good psychometric properties. The appropriate indicators were used for descriptive statistics, and t test, analysis of variance, Pearson's correlation analysis and multiple linear regression were used to analyse the influencing factors. RESULTS: In this study, the influencing factors of nursing interns' professional identity are education level, first choice of major, residential status, work atmosphere, and teacher capacity. The results showed that: (1) the nursing interns with a higher education level reported a lower level of professional identity; (2) the nursing interns whose first choice of major was not nursing discipline reported a lower level of professional identity; (3) the nursing interns live in rural areas (compared to urban areas) reported a higher level of professional identity; (4) the nursing interns in better work atmosphere reported a higher level of professional identity; (5) the nursing interns under the guidance of the teachers equipped with better teaching capacity reported a higher level of professional identity. CONCLUSION: The education level, first choice of major and residential status are influence factors of nursing interns' professional identity. The nursing educators need to pay attention to nursing interns whose first choice is not nursing, and in a bachelor program, who may have a lower level of professional identity. It is crucial to enhance the nursing interns' professional identity by improve the work atmosphere and clinical teachers' capacity, to promote nursing interns to choose nursing as a profession and reduce the shortage of nursing workforce.

16.
J Nurs Scholarsh ; 54(4): 501-512, 2022 07.
Artículo en Inglés | MEDLINE | ID: mdl-34866319

RESUMEN

AIMS: This study aimed to investigate whether the impact of workplace violence (WPV) on nurses' mental health varies with mental resilience and coping strategies. BACKGROUND: Workplace violence is a serious threat to nurses' mental health, and its impact on nurses' mental health is influenced by many factors. METHOD: A cross-sectional study involving 349 participants was conducted over 12 months. The data were analyzed using SPSS 25.0 and SPSS PROCESS macro. RESULTS: In total, 82.52% of nurses were exposed to WPV. WPV not only affects mental health directly but also indirectly through mental resilience. Coping strategies had a moderating effect among WPV, mental resilience and mental health. When nurses coped with psychological violence with intolerance, WPV had a stronger negative effect on their mental health. When nurses coped with psychological violence with tolerance but coped with physical violence with intolerance, mental resilience had a stronger positive effect on their mental health. CONCLUSIONS: Good mental resilience and coping with psychological violence with tolerance while coping with physical violence with intolerance can help buffer WPV and promote mental health. CLINICAL RELEVANCE: Employers who have a "zero tolerance" policy regarding WPV need to re-examine how they currently operate.


Asunto(s)
Enfermeras y Enfermeros , Violencia Laboral , Adaptación Psicológica , Estudios Transversales , Humanos , Salud Mental , Encuestas y Cuestionarios , Lugar de Trabajo/psicología , Violencia Laboral/psicología
17.
Angew Chem Int Ed Engl ; 61(9): e202116324, 2022 02 21.
Artículo en Inglés | MEDLINE | ID: mdl-34931420

RESUMEN

Inspired by efficient biomolecular reactions in the cell, versatile DNA nanostructures have been explored for manipulating the spatial position and regulating reactions at the molecular level. Spatially controlled arrangement of molecules on the artificial scaffolds generally leads to enhanced reaction activities. Especially, the rich toolset of dynamic DNA nanostructures provides a potential route towards more sophisticated and vigorous regulation of molecular reactions. Herein, a reconfigurable DNA origami domino array (DODA) as a dynamic scaffold was adopted in this work for temporal-controlled and switchable molecular cascade reactions. Dynamic regulation of the assembly of G-quadruplex, hybridization of parallel-stranded duplex and assembly of binary DNAzyme were demonstrated. Molecular cascade reactions on the triggered reconfiguration of DODAs were realized, resulting in more complex, dynamic, and switchable control over the reactions.

18.
J Pharm Pharmacol ; 73(2): 221-232, 2021 Mar 04.
Artículo en Inglés | MEDLINE | ID: mdl-33793807

RESUMEN

OBJECTIVES: This study was aimed to analyze the cytotoxicity of biogenic zinc oxide nanoparticles (ZnO NPs) in human cervical epithelial cancer HeLa. METHODS: The ZnO NPs was synthesized from the culture filtrated of Aspergillus terreus, and examined by UV-spectroscopy, X-ray diffraction (XRD), transmission electron microscope (TEM), energy-dispersive X-ray (EDX) and Fourier transform infrared (FTIR) analysis. The cytotoxicity of synthesized ZnO NPs was analyzed by the MTT assay, and the expression of apoptotic proteins was examined by Western blot analyses. KEY FINDINGS: The ZnO NPs exhibited concentration-dependent cytotoxicity on HeLa cells and induced the apoptosis as evidenced by reduced superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx) levels, and increased reactive oxygen species (ROS) and diminished mitochondrial membrane potential (MMP) was noticed in ZnO NPs treated HeLa cells. Western blot analyses explored that the Bcl-2 expression was significantly downregulated, whereas, the expression of p53, Bax, Caspase-3, Caspase-9 and Cytochrome-c were significantly upregulated in ZnO NPs treated cells. CONCLUSION: Consequently, the mycosynthesized ZnO NPs induces apoptosis in HeLa cells by persuading oxidative damage and modulating the apoptotic proteins. Therefore, A. terreus synthesized ZnO NPs could be used as an effective chemotherapeutic agent for cervical cancer treatment.


Asunto(s)
Antineoplásicos/farmacología , Nanopartículas , Neoplasias del Cuello Uterino/tratamiento farmacológico , Óxido de Zinc/farmacología , Antineoplásicos/administración & dosificación , Apoptosis/efectos de los fármacos , Aspergillus/metabolismo , Relación Dosis-Respuesta a Droga , Femenino , Células HeLa , Humanos , Estrés Oxidativo/efectos de los fármacos , Neoplasias del Cuello Uterino/patología , Óxido de Zinc/administración & dosificación
19.
Nanoscale ; 13(4): 2100-2112, 2021 Feb 04.
Artículo en Inglés | MEDLINE | ID: mdl-33475669

RESUMEN

SemiSynBio is an emerging topic toward the construction of platforms for next-generation information processing. Recent research has indicated its promising prospect toward information processing including algorithm design and pattern manipulation with the DNA TMSD reaction, which is one of the cores of the SemiSynBio technology route. The DNA TMSD reaction is the process in which an invader strand displaces the incumbent strand from the gate strand through initiation at the exposed toehold domain. Also, the DNA TMSD reaction generally involves three processes: toehold association, branch migration and strand disassociation. Herein, we review the recent progress on information processing with the DNA TMSD reaction. We highlight the diverse developments on information processing with the logic circuit, analog circuit, combinational circuit and information relay with the DNA origami structure. Additionally, we explore the current challenges and various trends toward the design and application of the DNA TMSD reaction in future information processing.


Asunto(s)
ADN , Lógica
20.
Angew Chem Int Ed Engl ; 59(51): 23277-23282, 2020 12 14.
Artículo en Inglés | MEDLINE | ID: mdl-32894584

RESUMEN

DNA origami enables the manipulation of objects at nanoscale, and demonstrates unprecedented versatility for fabricating both static and dynamic nanostructures. In this work, we introduce a new strategy for transferring modular reconfigurable DNA nanostructures from two-dimensional to three-dimensional. A 2D DNA sheet could be modularized into connected parts (e.g., two, three, and four parts in this work), which can be independently transformed between two conformations with a few DNA "trigger" strands. More interestingly, the transformation of the connected 2D modules can lead to the controlled, resettable structural conversion of a 2D sheet to a 3D architecture, due to the constraints induced by the connections between the 2D modules. This new approach can provide an efficient mean for constructing programmable, higher-order, and complex DNA objects, as well as sophisticated dynamic substrates for various applications.

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