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1.
Proteomics ; 24(1-2): e2300039, 2024 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-37654063

RESUMEN

Organophosphorus compounds (OPs) such as chemical agents and pesticides are posing critical threats to civilians due to their irreversible phosphonylation of diverse amino acids residues forming different protein adducts. However, traditional analytical approaches are quite limited in capturing the myriad of post-translational events that affect protein functions, especially in identifying the low-abundance OP adducts. Herein a systematic proteomic strategy based on a typical click-enrich-release-identify bioorthogonal operation was firstly developed by employing an alkynyl-tagged V-type agent probe (AVP) and a biotin-based azido-enrichment linker (BTP-N3 ). AVP targeting peptides from human serum albumin (HSA) or plasma were captured by BTP-N3 via CuAAC click reaction, enriched by streptavidin beads, released by selective alkaline hydrolysis of phenacyl ester bond, and subsequently sequenced by LC-MS/MS. This strategy has helped identifying 1115 unique OP adduction sites on 163 proteins in human plasma, and covers lots of OP adducts that cannot be achieved by traditional detection methods. The comprehensive coverage of novel OP substrates provided a general and sensitive approach to retrospective verification and/or dose assessment of toxic OPs.


Asunto(s)
Proteómica , Espectrometría de Masas en Tándem , Humanos , Cromatografía Liquida , Estudios Retrospectivos , Espectrometría de Masas en Tándem/métodos , Proteínas/metabolismo
2.
Small ; 20(1): e2304958, 2024 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-37649163

RESUMEN

Room temperature phosphorescence (RTP) has emerged as an interesting but rare phenomenon with multiple potential applications in anti-counterfeiting, optoelectronic devices, and biosensing. Nevertheless, the pursuit of ultralong lifetimes of RTP under visible light excitation presents a significant challenge. Here, new phosphorescent materials that can be excited by visible light with record-long lifetimes are demonstrated, realized through embedding nitrogen doped carbon dots (N-CDs) into a poly(vinyl alcohol) (PVA) film. The RTP lifetime of the N-CDs@PVA film is remarkably extended to 2.1 s excited by 420 nm, representing the highest recorded value for visible light-excited phosphorescent materials. Theoretical and experimental studies reveal that the robust hydrogen bonding interactions can effectively reduce the non-radiative decay rate and radiative transition rate of triplet excitons, thus dramatically prolong the phosphorescence lifetime. Notably, the RTP emission of N-CDs@PVA film can also be activated by easily accessible low-power white-light-emitting diode. More significantly, the practical applications of the N-CDs@PVA film in state-of-the-art anti-counterfeiting security and optical information storage domains are further demonstrated. This research offers exciting opportunities for utilizing visible light-activated ultralong-lived RTP systems in a wide range of promising applications.

3.
Urol Int ; 108(3): 264-271, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38368870

RESUMEN

INTRODUCTION: Extramammary Paget's disease of the scrotum and penis is a relatively rare cutaneous malignant tumor. At present, its pathogenesis, and clinical and pathological characteristics are not very clear. This is controversial regarding surgical margin width to decrease the high recurrence rate. This paper aimed to report the case and review the literature of extramammary Paget's disease of scrotum and penis. CASE PRESENTATION: We presented the case of a 74-year-old male patient with the patchy erythema and pruritus in the perineum who was admitted to our department. Biopsy of the large plaque revealed Paget disease. Under the condition of ensuring negative surgical margins by rapid frozen pathology, a wide local excision of the lesion, bilateral orchiectomy, and adnexectomy were performed on the patient. Pathology revealed that many scattered vacuolated Paget cells were observed in the epidermal layer, and the diagnosis was Paget's disease of the scrotum and penis. The 2 cm outside the skin lesion was used as the initial surgical margin, and free skin flap transplantation was used to repair the surgical wound. The patient recovered well and was discharged 1 week after surgery. CONCLUSION: Currently, histopathologic biopsy is the most important diagnostic method for EMPD. Once confirmed, for patients eligible for surgical intervention, wide local excision of the lesion and rapid intraoperative frozen pathological examination should be performed as soon as possible. The skin flap transplantation is the first choice for the repair of large-scale wound after surgery.


Asunto(s)
Enfermedad de Paget Extramamaria , Neoplasias del Pene , Escroto , Humanos , Masculino , Enfermedad de Paget Extramamaria/cirugía , Enfermedad de Paget Extramamaria/patología , Enfermedad de Paget Extramamaria/diagnóstico , Escroto/patología , Escroto/cirugía , Anciano , Neoplasias del Pene/cirugía , Neoplasias del Pene/patología , Neoplasias de los Genitales Masculinos/cirugía , Neoplasias de los Genitales Masculinos/patología , Neoplasias de los Genitales Masculinos/diagnóstico , Biopsia , Resultado del Tratamiento
4.
Int Wound J ; 21(1): e14649, 2024 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-38272796

RESUMEN

Facial soft tissue injuries, often resulting in scarring, pose a challenge in reconstructive and aesthetic surgery due to the need for functional and aesthetic restoration. This study evaluates the efficacy of recombinant human growth factors (rhGFs) in scar remodelling for such injuries. A retrospective evaluation was conducted from January 2020 to January 2023, involving 100 patients with facial soft tissue injuries. Participants were divided equally into a control group, receiving standard cosmetic surgical repair, and an observation group, treated with rhGFs supplemented cosmetic surgery. The study assessed scar characteristics (pigmentation, pliability, vascularity, height), hospital stay duration, tissue healing time, complication rates and patient satisfaction. The observation group demonstrated significant improvements in all scar characteristics, with notably better pigmentation, pliability, vascularity and height compared with the control group. The rhGF treatment also resulted in reduced hospital stay duration and faster tissue healing. Notably, the total complication rate was significantly lower in the observation group (10%) compared with the control group (34%). Additionally, patient satisfaction levels were higher in the observation group, with 98% combined satisfaction compared with 76% in the control group. The application of rhGFs in treating facial soft tissue injuries significantly enhances scar remodelling, expedites healing, reduces complications and improves patient satisfaction. These findings establish rhGFs as a valuable tool in the management of facial soft tissue injuries, highlighting their potential in improving both functional and aesthetic outcomes.


Asunto(s)
Traumatismos Faciales , Procedimientos de Cirugía Plástica , Traumatismos de los Tejidos Blandos , Humanos , Cicatriz/tratamiento farmacológico , Cicatriz/cirugía , Estudios Retrospectivos , Cicatrización de Heridas , Traumatismos de los Tejidos Blandos/tratamiento farmacológico , Traumatismos de los Tejidos Blandos/cirugía , Traumatismos Faciales/tratamiento farmacológico , Traumatismos Faciales/cirugía , Resultado del Tratamiento
5.
Int Urogynecol J ; 34(8): 1797-1802, 2023 08.
Artículo en Inglés | MEDLINE | ID: mdl-36738313

RESUMEN

INTRODUCTION AND HYPOTHESIS: Vesicovaginal fistula (VVF) brings severe psychological, physiological, and social stress to patients, which seriously affects the quality of their sexual life. Traditional transvaginal repair surgery can cause vaginal shortening. Transferring the lateral free flap can maintain vaginal length. This study was carried out to investigate the clinical efficacy of the surgery of flap transfer coverage for treating VVF. METHODS: A retrospective analysis was performed on 37 patients diagnosed with VVF and repaired by flap transfer coverage in the Urogynecology department of the First Affiliated Hospital of Kunming Medical University from January 2018 to June 2021. All patients took a prone split leg position to repair VVF with the flap transfer covering method and a chart review was performed. RESULTS: Among the 37 patients, there were 34 cases of primary complete healing, and the success rate reached 91.89% without recurrence and complications. Three cases recurred with leakage of urine; cystoscopy showed that the fistula was significantly reduced, and all patients were cured after secondary repair by the same surgical method without complications. CONCLUSIONS: Flap transfer coverage is a safe and effective surgical method for repairing VVF. The prone split leg position can better increase exposure. The fistula being away from the incision suture is the key to the success of the operation. Transferring the fistula can effectively improve the cure rate of VVF. Transferring the lateral free flap can maintain vaginal length.


Asunto(s)
Colgajos Tisulares Libres , Fístula Vesicovaginal , Femenino , Humanos , Fístula Vesicovaginal/cirugía , Fístula Vesicovaginal/etiología , Estudios Retrospectivos , Vagina/cirugía , Resultado del Tratamiento
6.
Medicina (Kaunas) ; 59(1)2023 Jan 12.
Artículo en Inglés | MEDLINE | ID: mdl-36676779

RESUMEN

Background and Objectives: The purpose of this study was to compare the complications, success rate and satisfaction of pelvic floor reconstruction after transobturator midurethral sling (TOT) and TOT combined with pelvic floor reconstruction in the treatment of female stress urinary incontinence. To explore the pathogenesis of stress urinary incontinence after pelvic floor stress injury and improve the surgical treatment strategy. Materials and Methods: From 15 August 2018 to 24 February 2022, patients diagnosed with stress urinary incontinence (SUI) and secondary prolapse of the anterior pelvis were selected to receive surgically. Participants were followed up and evaluated at 2 months, 6 months and 1 year after treatment. According to the patient's chief complaint, the patient can urinate automatically without incontinence. The number of urinary incontinence and urine leakage was significantly reduced compared with those before operation. Urinary incontinence symptoms did not improve or worsen as ineffective, observing the efficacy and complications. Results: We included 191 patients in the TOT group and 151 patients in the pelvic floor reconstruction group after TOT was combined. The operation time and hospital stay in the TOT group were short, but the TOT group needed a second operation to treat recurrent SUI. Perioperative complications were mostly dysuria, and the incidence of postoperative complications in the group of TOT combined with pelvic floor reconstruction was low. The complete success rate and effective rate of pelvic floor reconstruction after TOT in the merger group were significantly higher than those in the TOT group, and the patient satisfaction and complete success rate were also higher. Conclusions: TOT combined with posterior pelvic floor reconstruction has a definite short-term effect on patients with SUI and anterior pelvic secondary prolapse. The operation design should pay attention to the support of the posterior wall of the perineum to the bladder neck and the middle and proximal end of the urethra.


Asunto(s)
Incontinencia Urinaria de Esfuerzo , Humanos , Femenino , Incontinencia Urinaria de Esfuerzo/cirugía , Diafragma Pélvico/cirugía , Resultado del Tratamiento , Vejiga Urinaria , Prolapso
7.
Angew Chem Int Ed Engl ; 62(46): e202310263, 2023 Nov 13.
Artículo en Inglés | MEDLINE | ID: mdl-37604784

RESUMEN

Whispering-gallery-mode (WGM) microcavities featuring distinguishable sharp peaks in a broadband exhibit enormous advantages in the field of miniaturized photonic barcodes. However, such kind of barcodes developed hitherto are primarily based on microcavities wherein multiple gain medias were blended into a single matrix, thus resulting in the limited and indistinguishable coding elements. Here, a surface tension assisted heterogeneous assembly strategy is proposed to construct the spatially resolved WGM hetero-microrings with multiple spatial colors along its circular direction. Through precisely regulating the charge-transfer (CT) strength, full-color microrings covering the entire visible range were effectively acquired, which exhibit a series of sharp and recognizable peaks and allow for the effective construction of high-quality photonic barcodes. Notably, the spatially resolved WGM hetero-microrings with multiple coding elements were finally acquired through heterogeneous nucleation and growth controlled by the directional diffusion between the hetero-emulsion droplets, thus remarkably promoting the security strength and coding capacity of the barcodes. The results would be useful to fabricate new types of organic hierarchical hybrid WGM heterostructures for optical information recording and security labels.

8.
Org Biomol Chem ; 20(45): 8885-8892, 2022 11 23.
Artículo en Inglés | MEDLINE | ID: mdl-36317597

RESUMEN

A controllable and rapid synthesis of disulfides and thiosulfonates from sodium sulfinates mediated by hydroiodic acid is presented for the first time. In these reactions, ethanol and H2O are employed as solvents to generate different products, thiosulfonates can be further transformed to corresponding disulfides in an ethanol reaction system. Moreover, these simple methods are environmentally benign and can be performed under mild conditions with a short reaction time, showing good functional group tolerance.


Asunto(s)
Disulfuros , Sodio , Solventes , Etanol
9.
Nano Lett ; 21(16): 6792-6799, 2021 Aug 25.
Artículo en Inglés | MEDLINE | ID: mdl-34398615

RESUMEN

Lasing signals with easily distinguishable readout and cavity-geometry-dependent output are emerging as novel cryptographic primitives for two-dimensional (2D) optical encryption, while their practical application is restricted by the challenge of integrating different lasing elements onto an identical 2D pattern. Herein, a lithographic template-confined crystallization approach was proposed to prepare large-scale perovskite microstructures with any desired geometries and locations, which enabled them to serve as 2D lasing patterns for reliable encryption and authentication. These prepatterned perovskite microstructures realized whispering-gallery-mode lasing and also demonstrated outstanding reproducibility of lasing actions. Benefiting from the feature of their cavity-geometry-dependent lasing thresholds, we achieved controllable laser output from different shaped elements, which was further utilized for the proof-of-concept demonstration of a cryptographic implementation. The remarkable lasing performance and feasible preparation of 2D microlaser patterns with customized geometries and locations provide us deep insights into the concepts and fabrication technologies for 2D optical encryption.

10.
Medicina (Kaunas) ; 58(11)2022 Oct 22.
Artículo en Inglés | MEDLINE | ID: mdl-36363463

RESUMEN

Background and Objectives: pseudo urgency syndrome among patients with mixed incontinence (MUI) causes and the corresponding treatment strategies is explored. Materials and Methods: A total of 40 patients with MUI are treated with transobturator tape (TOT) and/or solifenacin succinate. Further, 30 patients with simple stress urinary incontinence (SUI) that were treated with transobturator tape (TOT) from the period of December 2018 to August 2020 are retrospectively analyzed; then, their clinical characteristics and therapeutic effects were summarized and analyzed. Results: The effective rates of SUI symptoms in MUI and simple SUI groups were 85% and 90%, respectively; further, the difference was noted as not statistically significant (P > 0.05). Among the 40 patients with MUI, 12 patients had unstable bladder contraction, and the other 28 patients showed normal bladder compliance. The treatment effectiveness rates of SUI symptoms in patients with unstable bladder contraction and normal bladder compliance were 83.3% and 85.7%, respectively; further, no significant difference was noted (P > 0.05). However, the effective rates of urge urinary incontinence (UUI) were 50% and 85.7%, respectively, however the difference was noted as statistically significant (P < 0.05). Conclusions: Most of the UUI symptoms in MUI patients may be "pseudo urgency syndrome" caused by the worry about the leakage of urine, rather than a real sense of UUI that is caused by excessive bladder excitement. Direct surgical treatment in patients with MUI can improve the symptoms of urinary incontinence, and the effect is more obvious in patients with urinary frequency who have normal bladder compliance according to urodynamics.


Asunto(s)
Incontinencia Urinaria de Esfuerzo , Incontinencia Urinaria , Humanos , Estudios Retrospectivos , Incontinencia Urinaria de Urgencia/tratamiento farmacológico , Incontinencia Urinaria de Urgencia/cirugía , Incontinencia Urinaria de Esfuerzo/cirugía , Resultado del Tratamiento
11.
Medicina (Kaunas) ; 59(1)2022 Dec 20.
Artículo en Inglés | MEDLINE | ID: mdl-36676629

RESUMEN

Stress urinary incontinence is a common disease in middle-aged and elderly women, which seriously affects the physical and mental health of the patients. For this reason, researchers have carried out a large number of studies on stress urinary incontinence. At present, it is believed that the pathogenesis of the disease is mainly due to changes related to age, childbirth, obesity, constipation and other risk factors that induce changes in the urinary control anatomy, including the anatomical factors of the urethra itself, the anatomical factors around the urethra and the anatomical factors of the pelvic nerve. The combined actions of a variety of factors lead to the occurrence of stress urinary incontinence. This review aims to summarize the anatomical pathogenesis of stress urinary incontinence from the above three perspectives.


Asunto(s)
Incontinencia Urinaria de Esfuerzo , Anciano , Persona de Mediana Edad , Humanos , Femenino , Incontinencia Urinaria de Esfuerzo/etiología , Incontinencia Urinaria de Esfuerzo/epidemiología , Factores de Riesgo , Obesidad/complicaciones , Uretra , Pelvis
12.
Org Biomol Chem ; 19(18): 4146-4151, 2021 05 12.
Artículo en Inglés | MEDLINE | ID: mdl-33881128

RESUMEN

Herein, we report on the highly efficient and practical synthesis of 2,3-dihydroquinazolinones directly from diverse aldehydes with excellent yields and enantioselectivity. Particularly, this protocol affords better enantiocontrol for aliphatic aldehydes (up to 99% yield, 97% ee), which always gave unsatisfactory results in the previous studies. Moreover, this catalytic system shows wide tolerance to different functional groups such as alkenyl, nitro and halogens. Most importantly, its practicability is well elucidated via the gram-scale synthesis of different types of products at 0.1 mol% catalyst loading and the simplified work-up procedure. To better understand the reaction pathway and origin of the enantioselectivity, DFT calculations were also performed.

13.
BMC Oral Health ; 21(1): 583, 2021 11 18.
Artículo en Inglés | MEDLINE | ID: mdl-34794414

RESUMEN

BACKGROUND: Type II diabetes mellitus (T2DM) is an important risk factor for osseointegration of implants. The aim of this study was to explore key genes of T2DM affecting bone metabolism through bioinformatic analysis of published RNA sequencing data, identify potential biomarkers, and provide a reference for finding the molecular mechanism of abnormal osseointegration caused by T2DM. METHODS: We identified differentially expressed mRNAs and miRNAs from the Gene Expression Omnibus database using the R package 'limma' and analysed the predicted target genes using Kyoto Encyclopedia of Genes and Genomes pathway enrichment analysis and Gene Ontology analysis. At the same time, miRNA-mRNA interactions were explored using miRWalk 2.0. RESULTS: We constructed an miRNA-gene regulatory network and a protein-protein interaction network. The enrichment pathways of differentially expressed mRNAs included extracellular matrix receptor interactions, protein digestion and absorption, the PI3K-Akt signalling pathway, cytokine-cytokine receptor interactions, chemokine signalling pathways, and haematopoietic cell lineage functions. We analysed the expression of these differentially expressed mRNAs and miRNAs in T2DM rats and normal rats with bone implants and identified Smpd3, Itga10, and rno-mir-207 as possible key players in osseointegration in T2DM. CONCLUSION: Smpd3, Itga10, and rno-mir-207 are possible biomarkers of osseointegration in T2DM. This study sheds light on the possible molecular mechanism of abnormal osseointegration caused by bone metabolism disorder in T2DM.


Asunto(s)
Implantes Dentales , Diabetes Mellitus Tipo 2 , MicroARNs , Animales , Biomarcadores , Biología Computacional , Diabetes Mellitus Tipo 2/genética , Oseointegración/genética , Fosfatidilinositol 3-Quinasas , Ratas
14.
Angew Chem Int Ed Engl ; 60(12): 6362-6366, 2021 Mar 15.
Artículo en Inglés | MEDLINE | ID: mdl-33315282

RESUMEN

Metal-organic frameworks (MOFs) have recently emerged as appealing platforms to construct microlasers owing to their compelling characters combining the excellent stability of inorganic materials and processable characters of organic materials. However, MOF microstructures developed thus far are generally composed of multiple edge boundaries due to their crystalline nature, which consequently raises significant scattering losses that are detrimental to lasing performance. In this work, we propose a strategy to overcome the above drawback by designing spherically shaped MOFs microcavities. Such spherical MOF microstructures are constructed by amorphizing MOFs with a topological distortion network through introducing flexible building blocks into the growth environment. With an ultra-smooth surface and excellent circular boundaries, the acquired spherical microcavities possess a Q factor as high as ≈104 and can provide sufficient feedback for high-quality single-mode lasing oscillations. We hope that these results will pave an avenue for the construction of new types of flexible MOF-based photonic components.

15.
Angew Chem Int Ed Engl ; 60(46): 24519-24525, 2021 Nov 08.
Artículo en Inglés | MEDLINE | ID: mdl-34339093

RESUMEN

Metal-organic frameworks (MOFs) heterostructures with domain-controlled emissive colors have shown great potential for achieving high-throughput sensing, anti-counterfeit and information security. Here, a strategy based on steric-hindrance effect is proposed to construct lateral lanthanide-MOFs (Ln-MOFs) epitaxial heterostructures, where the channel-directed guest molecules are introduced to rebalance in-plane and out-of-plane growth rates of the Ln-MOFs microrods and eventually generate lateral MOF epitaxial heterostructures with controllable aspect ratios. A library of lateral Ln-MOFs heterostructures are acquired through a stepwise epitaxial growth procedure, from which rational modulation of each domain with specific lanthanide doping species allows for definition of photonic barcodes in a two-dimensional (2D) domain with remarkably enlarged encoding capacity. The results provide molecular-level insight into the use of modulators in governing crystallite morphology for spatially assembling multifunctional heterostructures.

16.
BMC Cancer ; 20(1): 322, 2020 Apr 15.
Artículo en Inglés | MEDLINE | ID: mdl-32293344

RESUMEN

BACKGROUND: Response evaluation of neoadjuvant chemotherapy (NACT) in patients with osteosarcoma is significant for the termination of ineffective treatment, the development of postoperative chemotherapy regimens, and the prediction of prognosis. However, histological response and tumour necrosis rate can currently be evaluated only in resected specimens after NACT. A preoperatively accurate, noninvasive, and reproducible method of response assessment to NACT is required. In this study, the value of multi-parametric magnetic resonance imaging (MRI) combined with machine learning for assessment of tumour necrosis after NACT for osteosarcoma was investigated. METHODS: Twelve patients with primary osteosarcoma of limbs underwent NACT and received MRI examination before surgery. Postoperative tumour specimens were made corresponding to the transverse image of MRI. One hundred and two tissue samples were obtained and pathologically divided into tumour survival areas (non-cartilaginous and cartilaginous tumour viable areas) and tumour-nonviable areas (non-cartilaginous tumour necrosis areas, post-necrotic tumour collagen areas, and tumour necrotic cystic/haemorrhagic and secondary aneurismal bone cyst areas). The MRI parameters, including standardised apparent diffusion coefficient (ADC) values, signal intensity values of T2-weighted imaging (T2WI) and subtract-enhanced T1-weighted imaging (ST1WI) were used to train machine learning models based on the random forest algorithm. Three classification tasks of distinguishing tumour survival, non-cartilaginous tumour survival, and cartilaginous tumour survival from tumour nonviable were evaluated by five-fold cross-validation. RESULTS: For distinguishing non-cartilaginous tumour survival from tumour nonviable, the classifier constructed with ADC achieved an AUC of 0.93, while the classifier with multi-parametric MRI improved to 0.97 (P = 0.0933). For distinguishing tumour survival from tumour nonviable, the classifier with ADC achieved an AUC of 0.83, while the classifier with multi-parametric MRI improved to 0.90 (P < 0.05). For distinguishing cartilaginous tumour survival from tumour nonviable, the classifier with ADC achieved an AUC of 0.61, while the classifier with multi-parametric MRI parameters improved to 0.81(P < 0.05). CONCLUSIONS: The combination of multi-parametric MRI and machine learning significantly improved the discriminating ability of viable cartilaginous tumour components. Our study suggests that this method may provide an objective and accurate basis for NACT response evaluation in osteosarcoma.


Asunto(s)
Antineoplásicos/uso terapéutico , Neoplasias Óseas/diagnóstico por imagen , Neoplasias Óseas/tratamiento farmacológico , Osteosarcoma/diagnóstico por imagen , Osteosarcoma/tratamiento farmacológico , Adolescente , Neoplasias Óseas/patología , Niño , Estudios de Factibilidad , Femenino , Humanos , Aprendizaje Automático , Masculino , Imagen Multimodal , Imágenes de Resonancia Magnética Multiparamétrica , Necrosis , Terapia Neoadyuvante , Osteosarcoma/patología , Periodo Preoperatorio , Estudios Prospectivos , Resultado del Tratamiento , Adulto Joven
17.
FASEB J ; 33(1): 782-795, 2019 01.
Artículo en Inglés | MEDLINE | ID: mdl-30063438

RESUMEN

Tissue repair is a highly dynamic process, and the immediate onset of acute inflammation has been considered necessary for repair. Pore-forming proteins are important, both in pathogen invasion and host immunity. However, their roles in wound healing and tissue repair are unclear. ßγ-crystallin fused aerolysin-like protein (α-subunit) and trefoil factor (ß-subunit) complex (ßγ-CAT) is a complex of a bacterial pore-forming toxin aerolysin-like protein and trefoil factor identified in the frog Bombina maxima. In this study, we established mouse cutaneous wound models to explore the effects of ßγ-CAT on skin wound healing. ßγ-CAT accelerated the healing of full-thickness wounds by improving re-epithelialization. This complex relieved dermal edema and promoted scarless healing. ßγ-CAT treatment resulted in a rapid release of IL-1ß, which initiated an acute inflammation response in the early stage of healing. Meanwhile, the expression levels of TGF-ß1, VEGF, and bFGF and the recruitment of M2 macrophages around the wound significantly increased after ßγ-CAT treatment. ßγ-CAT protected skin wounds against methicillin-resistant Staphylococcus aureus by improving neutrophil recruitment at the site of the wound. Overall, our results suggest that ßγ-CAT can promote tissue repair and protect skin wounds against antibiotic-resistant bacterial infection by triggering the acute inflammatory response. This is the first example that aerolysin-like pore-forming proteins widely existing in plants and animals may act in wound healing and tissue repair.-Gao, Z.-H., Deng, C.-J., Xie, Y.-Y., Guo, X.-L., Wang, Q.-Q., Liu, L.-Z., Lee, W.-H., Li, S.-A., Zhang, Y. Pore-forming toxin-like protein complex expressed by frog promotes tissue repair.


Asunto(s)
Proteínas Citotóxicas Formadoras de Poros/metabolismo , Toxinas Biológicas/metabolismo , Cicatrización de Heridas , Animales , Anuros , Línea Celular , Colágeno/metabolismo , Cristalinas/metabolismo , Células Epiteliales/citología , Factor 2 de Crecimiento de Fibroblastos/metabolismo , Fibroblastos/citología , Humanos , Interleucina-1beta/metabolismo , Macrófagos/citología , Masculino , Staphylococcus aureus Resistente a Meticilina/patogenicidad , Ratones , Neutrófilos/citología , Conejos , Piel/lesiones , Infecciones Estafilocócicas/microbiología , Infecciones Estafilocócicas/prevención & control , Factor de Crecimiento Transformador beta1/metabolismo , Factores Trefoil/metabolismo , Factor A de Crecimiento Endotelial Vascular/metabolismo
18.
Soft Matter ; 16(7): 1760-1770, 2020 Feb 21.
Artículo en Inglés | MEDLINE | ID: mdl-31859322

RESUMEN

Photo-initiated thiol-ene click chemistry is used to develop shape memory liquid crystalline networks (LCNs). A biphenyl-based di-vinyl monomer is synthesized and cured with a di-thiol chain extender and a tetra-thiol crosslinker using UV light. The effects of photo-initiator concentration and UV light intensity on the curing behavior and liquid crystalline (LC) properties of the LCNs are investigated. The chemical composition is found to significantly influence the microstructure and the related thermomechanical properties of the LCNs. The structure-property relationship is further explored using molecular dynamics simulations, revealing that the introduction of the chain extender promotes the formation of an ordered smectic LC phase instead of agglomerated structures. The concentration of the chain extender affects the liquid crystallinity of the LCNs, resulting in distinct thermomechanical and shape memory properties. This class of LCNs exhibits fast curing rates, high conversion levels, and tailorable liquid crystallinity, making it a promising material system for advanced manufacturing, where complex and highly ordered structures can be produced with fast reaction kinetics and low energy consumption.

19.
J Oral Rehabil ; 47 Suppl 1: 66-72, 2020 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-31211857

RESUMEN

BACKGROUND: Although cell sheets have gained much interest as a non-scaffold strategy for tissue regeneration, the regenerative features of different cell sheets remain unclear. OBJECTIVE: In this study, we aimed to compare the regeneration characteristics of cell sheets derived from dental pulp stem cells (DPSCs), periodontal ligament stem cells (PDLSCs) and stem cells of the apical papilla (SCAPs). METHODS: Dental pulp stem cells, PDLSCs and SCAPs from the same individual were acquired and induced to form sheets using 20 µg/mL vitamin C. Immunofluorescence staining was used to detect the expression of collagen I, fibronectin, integrin ß1 and vimentin. Real-time PCR was used to determine NANOG, OCT4, SOX2 and TERT gene expression. The cell sheets with hydroxyapatite/tricalcium phosphate were transplanted into nude mice subcutaneously to evaluate tissue regeneration characteristics. RESULTS: No obvious differences were found in the histological structure and extracellular matrix protein expression between DPSC, PDLSC and SCAP sheets. Dental pulp stem cell sheet showed higher expression of OCT4 and TERT than PDLSC and SCAP sheets. All three cell sheets displayed the ability of mineral tissue formation and highly expressed periostin. The tissue derived from DPSC sheet showed higher CD31 expression and porous fibres compared with that from the others. The tissue fibres formed from PDLSC sheet were directionally arranged, while the tissue derived from SCAP sheet showed highest mineral tissue formation. CONCLUSION: Although in vitro DPSC, PDLSC and SCAP cell sheets have similar characteristics, their regenerative characteristics in vivo are different, with each showing potential application for regeneration of different tissues.


Asunto(s)
Osteogénesis , Células Madre , Animales , Diferenciación Celular , Células Cultivadas , Pulpa Dental , Humanos , Ratones , Ratones Desnudos , Ligamento Periodontal
20.
Angew Chem Int Ed Engl ; 59(43): 19060-19064, 2020 Oct 19.
Artículo en Inglés | MEDLINE | ID: mdl-32667717

RESUMEN

Micro/nanoscale photonic barcodes based on multicolor luminescent segmented heterojunctions hold potential for applications in information security. However, such multicolor heterojunctions reported thus far are exclusively based on static luminescent signals, thus restricting their application in advanced confidential information protection. Reported here is a strategy to design responsive photonic barcodes with heterobimetallic (Tb3+ /Eu3+ ) metal-organic framework multicolor heterostructures. The spatial colors could be precisely controlled by thermally manipulating the energy-transfer process between the two lanthanides, thus achieving responsive covert photonic barcodes. Also demonstrated is that spatially resolved responsive barcodes with multi-responsive features could be created in a single heterostructure. These findings offer unique opportunities to purposely design highly integrated responsive microstructures and smart devices toward advanced anti-counterfeiting applications.

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