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1.
Int J Paediatr Dent ; 2024 Sep 15.
Artículo en Inglés | MEDLINE | ID: mdl-39279151

RESUMEN

BACKGROUND: Hypohidrotic ectodermal dysplasia (HED) is a hereditary disorder with agenesis of ectodermal derivatives, causing oligodontia or anodontia. Dentures are needed to improve the patients' mastication. AIM: This study aimed at preliminarily evaluating the masticatory function changes in Chinese individuals with HED after prosthetic rehabilitation from childhood to adolescence. DESIGN: This longitudinal study enrolled 10 HED patients. Data were collected during childhood and adolescence, respectively. The healthy children and adolescents were recruited as the control group. The surface electromyography (EMG) of masseter (MM) and anterior temporalis (TA) muscles during clenching and chewing were recorded. The EMG activity, asymmetry index (As), activity index (Ac), and chewing cycle were analyzed. The masticatory efficiency was measured by spectrophotometry with subjective masticatory ability assessed by a questionnaire. RESULTS: The EMG activities and masticatory efficiency of HED patients during childhood and adolescence were mostly lower with a higher As (p < .05). The chewing process enhanced the TA activity and balanced the As of HED adolescents (p > .05). The HED adolescents showed a more prevalent TA activity (p < .05). CONCLUSION: The masticatory function of the growing HED patients was functionally inferior to the dentate individuals with a narrowed gap from childhood to adolescence.

2.
Int J Paediatr Dent ; 2024 Sep 10.
Artículo en Inglés | MEDLINE | ID: mdl-39255508

RESUMEN

BACKGROUND: Vital pulp therapy is gaining traction in dental practice, especially for young patients. AIM: To evaluate the outcomes of partial pulpotomy in permanent molars of children diagnosed with irreversible pulpitis (IP) using iRoot BP Plus. DESIGN: A total of 94 permanent molars in 88 patients, aged 6-15 years, with symptoms of IP, were treated with partial pulpotomy, using iRoot BP Plus as the pulp capping agent. The treated teeth underwent clinical and radiographic assessments at 1, 6, 12, 18, and 24 months postoperative. The outcomes were determined based on clinical and radiographic criteria by calibrated examiners. RESULTS: The success rates were 98.4% (63/64), 93.2% (41/44), and 89.7% (26/29) at the 6-month, 12-month, and 24-month follow-up. By the end of this study, the median follow-up period was 15.1 months, and the estimated survival rate was 95.2% at 24 months. Gender, root maturity, and number of missing walls had no significant effect on success rates. Six molars were failed, and root canal therapy (RCT) was applied. CONCLUSIONS: Partial pulpotomy for permanent molars with IP in young patients using iRoot BP Plus as pulp capping material achieved high success. This method presents a viable alternative to apexification and RCT for treating vital, inflamed molars with IP in children.

3.
Beijing Da Xue Xue Bao Yi Xue Ban ; 56(1): 179-184, 2024 Feb 18.
Artículo en Zh | MEDLINE | ID: mdl-38318915

RESUMEN

OBJECTIVE: To analyze the clinical and radiographic effectiveness of a calcium silicate-based bioactive ceramic iRoot BP Plus® pulpotomy of immature permanent teeth with complicated crown fracture and to evaluate the factors influencing its long-term success rate. METHODS: The digital medical records of patients under 13 years old who had undergone iRoot BP Plus® pulpotomy in the Department of Oral Emergency or the First Clinical Division, Peking University School and Hospital of Stomatology from March 2017 to September 2022 due to complicated crown fracture of anterior teeth, and had taken at least one post-operation apical radiograph were reviewed. The clinical and radiographic information at the initial examination and follow-up period were obtained, including crown color, mobility, percussion, cold test (partial pulpotomy teeth), dental restoration, fistula, swelling or inflammation of the gingival tissue, the formation of apical foramen, pathologic radiolucency and calcification of pulp chamber or root canal obliteration. Data were tested by Fisher exact test and a multiple comparison. RESULTS: In the study, 64 patients including 37 males (57.8%) and 27 females (42.2%) with a mean age of 9.1 years : ere finally enrolled. The total number of permanent teeth that received pulpotomy was 75, and the average follow-up time was 19.3 months. The success rate was 93.1% with the time interval between dental injury and treatment in 24 h, while the success rate dropped to 88.2% with the time intervals beyond 24 h. The time intervals did not significantly affect the pulp survival rate (P=0.61) after pulpotomy (partial or coronal). The success rate 6 months after pulpotomy was 96. 0%, and one-year success rate was 94. 7%. A total of 23 cases were reviewed for more than 2 years after pulpotomy, and 6 cases failed. The mobility had no significant effect on the success rate (P=0.28). Pulp chamber calcification and pulp canal obli-teration were not observed in all the post-operative radiographs. CONCLUSION: The one year clinical and radiographic success rates obtained in this study indicate that iRoot BP Plus® is an appropriate pulp capping material option for pulpotomy treatment of complicated crown fracture in immature permanent teeth without displacement injuries. This technique has broad promotional value.


Asunto(s)
Pulpotomía , Fracturas de los Dientes , Masculino , Niño , Femenino , Humanos , Adolescente , Pulpotomía/métodos , Silicatos/uso terapéutico , Compuestos de Calcio/uso terapéutico , Dentición Permanente , Coronas , Fracturas de los Dientes/complicaciones , Fracturas de los Dientes/terapia , Cerámica , Resultado del Tratamiento , Óxidos
4.
Clin Oral Investig ; 25(5): 3067-3076, 2021 May.
Artículo en Inglés | MEDLINE | ID: mdl-33063220

RESUMEN

OBJECTIVES: The purpose of this randomized controlled trial was to compare the 24-month success rates of indirect pulp treatment (IPT) and iRoot BP Plus pulpotomy of primary molars with extremely deep caries. MATERIALS AND METHODS: Generally healthy children aged 3-7 years requiring general anesthesia for treating primary molars with extremely deep caries or reversible pulpitis were recruited. Patients with systemic disease, mental health problems, or manifestations of irreversible pulpitis were excluded. In total, 175 molars were randomized and blinded for either IPT (n = 87) or iRoot BP Plus pulpotomy (n = 88). All teeth were restored with stainless steel crowns and evaluated after 6, 12, 18, and 24 months by two blinded calibrated investigators. Kaplan-Meier survival curves were used to compare the survival rates between the groups. The correlations between success rate and patient characteristics were explored with the Cox proportional hazards model. RESULTS: A total of 168 primary molars in 67 patients (average age: 3.83 years) were evaluated. The cumulative survival probability at 24 months was not significantly different between the IPT (93.8%) and pulpotomy (97.7%) groups (P = 0.238). IPT treatment success was significantly associated with age (odds ratio = 2.347; 95% CI: 1.068-5.156; P = 0.034) and preoperative sensitivity (odds ratio = 9.742; 95% CI: 1.079-87.970; P = 0.043). CONCLUSIONS: The 24-month success rates of IPT and iRoot BP Plus pulpotomy performed in primary molars with extremely deep caries were not significantly different. Increasing age and preoperative sensitivity were found to be associated with the cumulative survival probability in IPT-treated primary molars with extremely deep caries. Primary teeth with extremely deep carious lesions without signs of irreversible pulpitis can be treated successfully by either indirect pulp capping or iRoot BP Plus pulpotomy. TRIAL REGISTRATION: ChiCTR2000032462.


Asunto(s)
Caries Dental , Pulpotomía , Compuestos de Calcio , Niño , Preescolar , Caries Dental/terapia , Susceptibilidad a Caries Dentarias , Humanos , Óxidos , Estudios Prospectivos , Silicatos , Diente Primario , Resultado del Tratamiento
5.
Chem Soc Rev ; 48(10): 2783-2828, 2019 May 20.
Artículo en Inglés | MEDLINE | ID: mdl-31032507

RESUMEN

Rapidly increasing atmospheric CO2 concentrations threaten human society, the natural environment, and the synergy between the two. In order to ameliorate the CO2 problem, carbon capture and conversion techniques have been proposed. Metal-organic framework (MOF)-based materials, a relatively new class of porous materials with unique structural features, high surface areas, chemical tunability and stability, have been extensively studied with respect to their applicability to such techniques. Recently, it has become apparent that the CO2 capture capabilities of MOF-based materials significantly boost their potential toward CO2 conversion. Furthermore, MOF-based materials' well-defined structures greatly facilitate the understanding of structure-property relationships and their roles in CO2 capture and conversion. In this review, we provide a comprehensive account of significant progress in the design and synthesis of MOF-based materials, including MOFs, MOF composites and MOF derivatives, and their application to carbon capture and conversion. Special emphases on the relationships between CO2 capture capacities of MOF-based materials and their catalytic CO2 conversion performances are discussed.

6.
Can J Physiol Pharmacol ; 95(12): 1396-1405, 2017 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-28679060

RESUMEN

Epigallocatechin-3-gallate (EGCG), a polyphenol in green tea, is an effective antioxidant and possesses neuroprotective effects. Brain-derived neurotrophic factor (BDNF) and cyclic AMP response element-binding protein (CREB) are crucial for neurogenesis and synaptic plasticity. In this study, we aimed to assess the protective effects of EGCG against sevoflurane-induced neurotoxicity in neonatal mice. Distinct groups of C57BL/6 mice were given EGCG (25, 50, or 75 mg/kg body weight) from postnatal day 3 (P3) to P21 and were subjected to sevoflurane (3%; 6 h) exposure on P7. EGCG significantly inhibited sevoflurane-induced neuroapoptosis as determined by Fluoro-Jade B staining and terminal deoxynucleotidyl transferase dUTP nick end labelling (TUNEL). Increased levels of cleaved caspase-3, downregulated Bad and Bax, and significantly enhanced Bcl-2, Bcl-xL, xIAP, c-IAP-1, and survivin expression were observed. EGCG induced activation of the PI3K/Akt pathway as evidenced by increased Akt, phospho-Akt, GSK-3ß, phospho-GSK-3ß, and mTORc1 levels. Sevoflurane-mediated downregulation of cAMP/CREB and BDNF/TrkB signalling was inhibited by EGCG. Reverse transcription PCR analysis revealed enhanced BDNF and TrkB mRNA levels upon EGCG administration. Improved performance of mice in Morris water maze tests suggested enhanced learning and memory. The study indicates that EGCG was able to effectively inhibit sevoflurane-induced neurodegeneration and improve learning and memory retention of mice via activation of CREB/BDNF/TrkB-PI3K/Akt signalling.


Asunto(s)
Catequina/análogos & derivados , Éteres Metílicos/farmacología , Neuronas/citología , Neuronas/efectos de los fármacos , Polifenoles/farmacología , Transducción de Señal/efectos de los fármacos , Té/química , Animales , Animales Recién Nacidos , Apoptosis/efectos de los fármacos , Factor Neurotrófico Derivado del Encéfalo/metabolismo , Caspasa 3/genética , Catequina/farmacología , Supervivencia Celular/efectos de los fármacos , AMP Cíclico/metabolismo , Proteína de Unión a Elemento de Respuesta al AMP Cíclico/metabolismo , Citoprotección/efectos de los fármacos , Regulación Enzimológica de la Expresión Génica/efectos de los fármacos , Memoria/efectos de los fármacos , Ratones , Ratones Endogámicos C57BL , Neuronas/metabolismo , Fármacos Neuroprotectores/farmacología , Fosfatidilinositol 3-Quinasas/metabolismo , Proteínas Proto-Oncogénicas c-akt/metabolismo , Receptor trkB/metabolismo , Sevoflurano , Conducta Espacial/efectos de los fármacos , Serina-Treonina Quinasas TOR/metabolismo
8.
J Am Chem Soc ; 138(16): 5316-20, 2016 04 27.
Artículo en Inglés | MEDLINE | ID: mdl-27016046

RESUMEN

The synthesis of phase-pure metal-organic frameworks (MOFs) is of prime importance but remains a significant challenge because of the flexible and diversified coordination modes between metal ions and organic linkers. In this work, we report the synthesis of phase-pure MOFs via a facile seed-mediated approach. For several "accompanying" pairs of Zr-porphyrinic MOFs that are prone to yield mixtures, by fixing all reaction parameters except introducing seed crystals, MOFs in phase-pure forms have been obtained because the stage of MOF nucleation, which generates mixed nuclei, is bypassed. In addition, phase-pure MOF isomers with distinct pore structures have also been prepared through such an approach, revealing its versatility. To the best of our knowledge, this is an initial report on seed-assisted synthesis of phase-pure MOFs.

9.
Inorg Chem ; 55(7): 3558-65, 2016 Apr 04.
Artículo en Inglés | MEDLINE | ID: mdl-26974010

RESUMEN

An In-based metal-organic framework, with 1D nanotubular open channels, In2(OH)(btc)(Hbtc)0.4(L)0.6·3H2O (1), has been synthesized via an in situ ligand reaction, in which 1,2,4-H3btc is partially transformed into the L ligand. Compound 1 exhibits exceptional thermal and chemical stability, especially in water or acidic media. The activated 1 presents highly selective sorption of carbon dioxide (CO2) over dinitrogen. Interestingly, diffuse-reflectance infrared Fourier transform spectroscopy with a carbon monoxide probe molecule demonstrates that both Lewis and Brønsted acid sites are involved in compound 1. As a result, as a heterogeneous Lewis and Brønsted acid bifunctional catalyst, 1 possesses excellent activity and recyclability for chemical fixation of CO2 coupling with epoxides into cyclic carbonates under mild conditions. In addition, the mechanism for the CO2 cycloaddition reaction has also been discussed.

10.
Analyst ; 139(14): 3541-7, 2014 Jul 21.
Artículo en Inglés | MEDLINE | ID: mdl-24862863

RESUMEN

A novel and label-free fluorescence polarization (FP) method for the determination of pyrophosphate (PPi) is developed based on the change in FP signals during fast reversible transformation between CdTe zero-dimensional (0D) nanocrystals (NCs) and one-dimensional (1D) nanorods (NRs) induced by addition of PPi. Under optimum conditions, the FP ratio was linearly proportional to the logarithm of the concentration of PPi between 2.0 × 10(-5) and 1.0 × 10(-9) M with a detection limit of 8.0 × 10(-10) M. The developed method, with high signal selectivity and stability, was successfully applied to the detection of PPi in human urine samples.


Asunto(s)
Compuestos de Cadmio/química , Difosfatos/orina , Polarización de Fluorescencia/métodos , Nanopartículas/química , Nanotubos/química , Telurio/química , Difosfatos/análisis , Humanos , Límite de Detección
11.
ACS Appl Mater Interfaces ; 16(24): 30890-30899, 2024 Jun 19.
Artículo en Inglés | MEDLINE | ID: mdl-38843539

RESUMEN

Multimodal sensing platforms may offer reliable, fast results, but it is still challenging to incorporate biosensors with high discriminating ability in complex biological samples. Herein, we established a highly sensitive dual colorimetric/electrochemical monitoring approach for the detection of hydrogen sulfide (H2S) utilizing Cu-doped In-based metal-organic frameworks (Cu/In-MOFs) combined with a versatile color selector software-based smartphone imaging device. H2S can result in the enhancement of the electrochemical signal because of the electroactive substance copper sulfide (CuxS), the decrease of the colorimetric signal of the characteristic absorption response caused by the strong coordination effect on Cu/In-MOFs, and the obvious changes of red-green-blue (RGB) values of images acquired via an intelligent smartphone. Attractively, the Cu/In-MOFs-based multimodal detection guarantees precise and sensitive detection of H2S with triple-signal detection limits of 0.096 µM (electrochemical signals), 0.098 µM (colorimetric signals), and 0.099 µM (smartphone signals) and an outstanding linear response. This analytical toolkit provides an idea for fabricating a robust, sensitive, tolerant matrix and reliable sensing platform for rapidly monitoring H2S in clinical disease diagnosis and visual supervision.


Asunto(s)
Colorimetría , Cobre , Técnicas Electroquímicas , Sulfuro de Hidrógeno , Estructuras Metalorgánicas , Teléfono Inteligente , Sulfuro de Hidrógeno/análisis , Cobre/química , Estructuras Metalorgánicas/química , Colorimetría/métodos , Colorimetría/instrumentación , Técnicas Electroquímicas/métodos , Técnicas Electroquímicas/instrumentación , Técnicas Biosensibles/métodos , Técnicas Biosensibles/instrumentación , Límite de Detección , Indio/química
12.
Diagn Pathol ; 19(1): 66, 2024 May 10.
Artículo en Inglés | MEDLINE | ID: mdl-38730456

RESUMEN

BACKGROUND: TFEB/6p21/VEGFA-amplified renal cell carcinoma (RCC) is rare and difficult to diagnose, with diverse histological patterns and immunohistochemical and poorly defined molecular genetic characteristics. CASE PRESENTATION: We report a case of a 63-year-old male admitted in 2017 with complex histomorphology, three morphological features of clear cell, eosinophilic and papillary RCC and resembling areas of glomerular and tubular formation. The immunophenotype also showed a mixture of CD10 and P504s. RCC with a high suspicion of collision tumors was indicated according to the 2014 WHO classification system; no precise diagnosis was possible. The patient was diagnosed at a different hospital with poorly differentiated lung squamous cell carcinoma one year after RCC surgery. We exploited molecular technology advances to retrospectively investigate the patient's molecular genetic alterations by whole-exome sequencing. The results revealed a 6p21 amplification in VEGFA and TFEB gene acquisition absent in other RCC subtypes. Clear cell, papillary, chromophobe, TFE3-translocation, eosinophilic solid and cystic RCC were excluded. Strong TFEB and Melan-A protein positivity prompted rediagnosis as TFEB/6p21/VEGFA-amplified RCC as per 2022 WHO classification. TMB-L (low tumor mutational load), CCND3 gene acquisition and MRE11A and ATM gene deletion mutations indicated sensitivity to PD-1/PD-L1 inhibitor combinations and the FDA-approved targeted agents Niraparib (Grade C), Olaparib (Grade C), Rucaparib (Grade C) and Talazoparib (Class C). GO (Gene Ontology) and KEGG enrichment analyses revealed major mutations and abnormal CNVs in genes involved in biological processes such as the TGF-ß, Hippo, E-cadherin, lysosomal biogenesis and autophagy signaling pathways, biofilm synthesis cell adhesion substance metabolism regulation and others. We compared TFEB/6p21/VEGFA-amplified with TFEB-translocated RCC; significant differences in disease onset age, histological patterns, pathological stages, clinical prognoses, and genetic characteristics were revealed. CONCLUSION: We clarified the patient's challenging diagnosis and discussed the clinicopathology, immunophenotype, differential diagnosis, and molecular genetic information regarding TFEB/6p21/VEGFA-amplified RCC via exome analysis and a literature review.


Asunto(s)
Factores de Transcripción Básicos con Cremalleras de Leucinas y Motivos Hélice-Asa-Hélice , Carcinoma de Células Renales , Secuenciación del Exoma , Neoplasias Renales , Humanos , Masculino , Persona de Mediana Edad , Carcinoma de Células Renales/genética , Carcinoma de Células Renales/patología , Factores de Transcripción Básicos con Cremalleras de Leucinas y Motivos Hélice-Asa-Hélice/genética , Neoplasias Renales/genética , Neoplasias Renales/patología , Biomarcadores de Tumor/genética
13.
J Colloid Interface Sci ; 629(Pt B): 796-804, 2023 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-36195019

RESUMEN

Hydrogen sulfide (H2S) can not only be regarded as a critical gas signal transduction substance, but also its excess levels can lead to a range of diseases. Currently, the accurate analysis combined with electrochemical (EC) or photothermal (PT) technology for H2S in a complex biological system remains a significant challenge. Herein, an endogenous H2S-triggered heterojunction cuprous oxide/gold/copper metal organic framework (Cu2O/Au/HKUST-1) nanoprobe is designed for dual-mode EC- second near-infrared (NIR-II)/PT analysis in tumor cells with high sensitivity and simplicity. Dual-mode EC quantification - PT is achieved through "off-on" mode of EC and PT signals based on electronic transfer and biosynthesis via an in situ sulfuration reaction. Under the optimum conditions, the EC quantification mode for trace H2S exhibits a wide linear range and an excellent limit of detection of 0.1 µM. More importantly, the dual-mode can display the selective detection of trace H2S in living tumor cells because of the specific interaction between copper ion and H2S. These results provide a new EC-PT promising biosensing platform for noninvasive intelligent detection of H2S in living tumor cells.


Asunto(s)
Técnicas Biosensibles , Sulfuro de Hidrógeno , Estructuras Metalorgánicas , Sulfuro de Hidrógeno/análisis , Cobre/química , Oro/química , Estructuras Metalorgánicas/química , Técnicas Biosensibles/métodos
14.
Talanta ; 260: 124584, 2023 Aug 01.
Artículo en Inglés | MEDLINE | ID: mdl-37121141

RESUMEN

Detection of biomarkers is very vital in the prevention, diagnosis and treatment of diseases. However, due to the poor accuracy and sensitivity of the constructed biosensors, we are now facing great challenges. In addressing these problems, nanohybrid-based dual mode biosensors including optical-optical, optical-electrochemical and electrochemical-electrochemical have been developed to detect various biomarkers. Integrating the merits of nanomaterials with abundant active sites, synergy and excellent physicochemical properties, many bi-functional nanohybrids have been reasonable designed and controllable preparation, which applied to the construction dual mode biosensors. Despite the significant progress, further efforts are still needed to develop dual mode biosensors and ensure their practical application by using portable digital devices. Therefore, the present review summarizes an in-depth evaluation of the bi-functional nanohybrids assisted dual mode biosensing platform of biomarkers. We are hoping this review could inspire further concepts in developing novel dual mode biosensors for possible detection application.


Asunto(s)
Técnicas Biosensibles , Nanoestructuras , Nanoestructuras/química , Biomarcadores , Técnicas Electroquímicas
15.
Food Chem ; 423: 136296, 2023 Oct 15.
Artículo en Inglés | MEDLINE | ID: mdl-37187008

RESUMEN

The rational fabrication of point-of-care testing (POCT) featuring simplicity, rapidity, low cost, portability, high sensitivity and accuracy is crucial for maintaining food safety in resource-limited locations and home healthcare but remains challenging. Herein, we report a universal colorimetric-photothermal-smartphone triple-mode sensing platform for POC food-grade glutathione (GSH) detection. This simple sensing platform for GSH detection takes merits of three techniques: commercially available filter paper, thermometer and smartphone via an excellent CoFeCe-mediated oxidase-like activity. This strategy allows CoFeCe three-atom hydroxide to efficiently convert dissolved oxygen into O2·- and catalyzes 3, 3', 5, 5'-tertamethylbenzidine (TMB) to generate an oxidized TMB with remarkable color changes and photothermal effect, resulting in a colorimetric-temperature-color triple-mode signal output. The constructed sensor exhibits high sensitivity with a limit of detection of 0.092 µM for GSH detection. We expect this sensing platform can be easily modified for the determination of GSH in commercial samples with the simple testing strips.


Asunto(s)
Colorimetría , Oxidorreductasas , Colorimetría/métodos , Teléfono Inteligente , Glutatión , Límite de Detección , Peróxido de Hidrógeno
16.
Diagn Pathol ; 18(1): 35, 2023 Mar 04.
Artículo en Inglés | MEDLINE | ID: mdl-36871023

RESUMEN

BACKGROUND: Myeloid Sarcoma with monocytic differentiation is rare and quite likely is missed by surgical pathologists. However it is frequently misdiagnosed because of its non-specific imaging and histological pattern. CASE PRESENTATION: We report the case of a 64-year-old woman with gastric primary myeloid sarcoma with monocytic differentiatio. Upper endoscopy revealed a neoplastic growth at the junction of the lesser curvature and gastric antrum. Except for a slightly increased peripheral monocyte count, no abnormalities were found on hematological and bone-marrow examination. Gastroscopic biopsy showed poorly differentiated atypical large cells with visible nucleoli and nuclear fission. Immunohistochemistry showed positive CD34, CD4, CD43, and CD56 expression, and weakly positive lysozyme expression. Immune markers for poorly differentiated adenocarcinoma, malignant melanoma, and lymphohematopoietic-system tumors were negative. The final diagnosis was myeloid sarcoma with monocytic differentiation. Chemotherapy did not shrink the tumor, so, radical surgery was performed. Although the tumor morphology did not change postoperatively, the immunophenotype did. CD68 and lysozyme expression (tumor tissue markers) changed from negative and weakly positive to strongly positive, AE1/3 expression (epithelial marker) changed from negative to positive, and CD34, CD4, CD43, and CD56 expression (common in naive hematopoietic cell-derived tumors) was greatly attenuated. Exome sequencing revealed missense mutations in FLT3 and PTPRB, which are associated with myeloid sarcoma, and in TP53, CD44, CD19, LTK, NOTCH2, and CNTN2, which are associated with lymphohematopoietic tumors and poorly differentiated cancers. CONCLUSION: We diagnosed myeloid sarcoma with monocytic differentiation after excluding poorly differentiated adenocarcinoma, common lymphohematopoietic-system tumors, epithelioid sarcoma, and malignant melanoma. We identified that the immunophenotypic of patient had alterations after chemotherapy, and FLT3 gene mutations. We hope that the above results will improve our understanding of this rare tumor.


Asunto(s)
Adenocarcinoma , Neoplasias Hematológicas , Melanoma , Sarcoma Mieloide , Femenino , Humanos , Persona de Mediana Edad , Muramidasa , Secuenciación del Exoma , Diferenciación Celular , Melanoma Cutáneo Maligno
17.
Anal Chim Acta ; 1229: 340390, 2022 Oct 09.
Artículo en Inglés | MEDLINE | ID: mdl-36156228

RESUMEN

Hydrogen sulfide (H2S) is a vital endogenous gas signal molecule undertaking numerous physiological functions such as biological regulation and cytoprotection. Herein, we developed an electrochemical (EC) and photothermal (PT) dual-readout signals method for H2S detection based on a novel biosynthesis-mediated Ni-Fe-Cu LDH-to-sulfides transformation strategy. Interestingly, the Cu2+-based Ni-Fe LDH (Ni-Fe-Cu LDH) can act as the Cu2+ source to react with H2S, resulting in the in-situ generation of CuxS on Ni-Fe-Cu LDH surfaces. Because of the EC signal and intrinsic near-infrared (NIR) PT conversion ability of CuxS under 808 nm laser irradiation, the obtained CuxS@Ni-Fe-Cu LDH is applied to stimulate EC signal and temperature readout. By this means, a dual-readout signal mode is established for H2S detection. Under the optimum conditions, this combination of EC and PT methods displays a wide linear range for H2S to 0.1 µM-90 µM and 50 µM-400 µM, respectively, with a low detection limit of 0.09 µM. In addition, the practicality of Ni-Fe-Cu LDH is verified by determination of endogenous H2S in living cells. This work not only provides a promising application for H2S diagnosis but also exhibits the new characteristic of Ni-Fe-Cu LDH nanomaterials as signal transduction tags.


Asunto(s)
Sulfuro de Hidrógeno , Sulfuro de Hidrógeno/química , Sulfuros
18.
Bioresour Technol ; 344(Pt A): 126163, 2022 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-34688859

RESUMEN

Metal-organic frameworks (MOFs) could serve as efficient matrixes to immobilize cellulase because of their high stability and porous morphology. Herein, the Zr-based MOFs (UiO-66 and UiO-66-NH2) assisted 20 wt% high-solids hydrolysis of untreated corncob residues (CRs) at low enzyme loading was investigated. Glucan hydrolysis yields increased to 60.55% and 71.47% by separately adding 4 g/L UiO-66 and UiO-66-NH2 at 5 FPU/g-glucan cellulase dosage. The maximum hydrolysis yield reached 90.01% at 10 FPU/g-glucan in the presence of 4 g/L UiO-66-NH2. Analysis of free protein concentration and cellulase activity suggested that MOFs effectively increased cellulase catalytic activity and stability, thus boosted CRs enzymatic hydrolysis efficiency. Additionally, UiO-66-NH2 immobilization gave a high catalytic activity because of the abundant anchor sites of NH2 groups. This research presents the promising future of MOFs' application in lignocellulosic biomass bioconversion and other areas requiring immobilized enzymes.


Asunto(s)
Celulasa , Estructuras Metalorgánicas , Hidrólisis , Compuestos Organometálicos , Ácidos Ftálicos , Zea mays
19.
Photodiagnosis Photodyn Ther ; 38: 102716, 2022 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-35021109

RESUMEN

The rational design of tumor microenvironment (TME)- multifunctional stimuli-responsive nanocomposites is appealing for effective cancer treatment. However, multidrug resistance remains an obstacle to construct responsive oncotherapy. Herein, a novel MoS2/PDA-TPP nanocomposite loaded with chemotherapy drug of doxorubicin (DOX) is designed for TME dual-response and synergistically enhanced anti-tumor therapy based on the tumor-specific mitochondria accumulation ability and photothermal (PTT) therapy. In detail, the designed MoS2/PDA-TPP nanoplatform can act as a pH-responsive dissociation to endow fast release of DOX under an acidic TME and simultaneously improve the efficiency of PTT. Moreover, the mechanism shows that MoS2/PDA-TPP trigger mitochondrial-dependent apoptosis by producing reactive oxygen species (ROS) and reducing mitochondrial membrane potential (MMP). Most importantly, during PTT procedure, hyperthermia up to 50 °C can effectively induce tumor cell death without causing severe inflammation to adjacent tissues. Tumor targeting double stimulation response of nanocomposites is a novel idea to overcome drug resistance, which will provide a more effective strategy for solving practical problems.


Asunto(s)
Hipertermia Inducida , Nanopartículas , Neoplasias , Fotoquimioterapia , Línea Celular Tumoral , Doxorrubicina/farmacología , Sistemas de Liberación de Medicamentos , Humanos , Molibdeno/uso terapéutico , Neoplasias/tratamiento farmacológico , Neoplasias/patología , Fotoquimioterapia/métodos , Fototerapia , Terapia Fototérmica , Microambiente Tumoral
20.
Carbohydr Polym ; 270: 118376, 2021 Oct 15.
Artículo en Inglés | MEDLINE | ID: mdl-34364620

RESUMEN

Zeolitic imidazolate frameworks (ZIFs) hold great potential for carbon capture, while a major challenge for the practical application of ZIFs is the development of convenient three-dimensional bulk materials. Here, sustainable and biodegradable bacterial cellulose (BC) was used as the substrate for ZIF growth. Amino-functionalized ZIF-8 (ZIF-8-NH2) was prepared within BC substrate via an in situ growth approach. ZIF crystals were wrapped uniformly over cellulose fibers and the chelating effect between metal (zinc) ions and hydroxyl groups makes the composites have high interface affinity and compatibility. The resulting foams presented a high CO2 adsorption capacity of 1.63 mmol/g (25 °C, 1 bar). Moreover, ZIF-8-NH2@BC foams are facile to be regenerated by heating at 80 °C. This work provides a new avenue to construct ZIF/cellulose composites for gas treatment applications.


Asunto(s)
Dióxido de Carbono/química , Celulosa/química , Imidazoles/química , Polisacáridos Bacterianos/química , Zeolitas/química , Adsorción , Temperatura , Difracción de Rayos X/métodos , Zinc/química
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