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1.
Skeletal Radiol ; 2024 Mar 21.
Artículo en Inglés | MEDLINE | ID: mdl-38512364

RESUMEN

A 50-year-old male presented with neck and shoulder pain. Chest CT and 18F-FDG PET/CT revealed osteolytic bone destruction in the left first rib and thoracic vertebrae with increased FDG uptake. Rib biopsy pathology indicated desmoplastic small round cell tumor (DSRCT).18F-FDG PET/CT can accurately locate the distribution of DSRCT and further guide the location of needle biopsy to assist the DSRCT.

2.
Artículo en Inglés | MEDLINE | ID: mdl-38758241

RESUMEN

OBJECTIVES: This study aimed to explore the diagnostic sensitivity of 3D heavily weighted T2-weighted MRI (T2MRI) and high-resolution computed tomography (HRCT) in patients with cochlear fibrosis associated with Streptococcus suis (S. suis) meningitis and the practicality of Cochlear implantation (CI) treatments. METHODS: Between January 2020 and December 2022, we enrolled four patients with rare cochlear S. suis meningitis with associated hearing loss despite aggressive or non-aggressive follow-up antibiotic treatment. Clinical imaging data, surgical performances and post-surgical-electrode impedance were evaluated. RESULTS: Combined with HRCT and T2MRI, the cochlea had varying degrees of fibrosis and ossification in different cases. However, the electrodes were successfully and wholly inserted after intraoperative removal of the ossified and fibrotic foci. Post-surgical electrode impedance values of MP1 + 2 mode were normal in all 4 cases at initial activation. CONCLUSION: In patients with S. suis meningitis and associated cochlear fibrosis, T2MRI examination of the inner ear was more sensitive than HRCT. This research highlights the feasibility of CI treatment in S. suis meningitis patients with severe cochlear fibrosis.

3.
Eur Arch Otorhinolaryngol ; 280(2): 681-688, 2023 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-35870003

RESUMEN

PURPOSE: We aimed to clarify the clinical features of delayed-onset swelling around cochlear implants (CI), and to present our experience on how to avoid and address this problem. METHODS: We performed a retrospective review of all CI cases at our institution between June 2001 and June 2020. Information on postoperative complications of swelling in the receiver area > 3 months after implantation were analyzed, and clinical data sheets were drawn. RESULTS: Twenty-six of 1425 patients (1.82%) with an age at implantation ranging from 1 to 9 years experienced delayed-onset swelling around the implant. Swelling episodes occurred as early as 4 months, and as late as 178 months after implantation (median, 79.7 months). The predisposing factor in 12 cases was unclear, 7 cases were caused by trauma at the implantation site, 5 cases were without predisposing factors, and 2 cases were related to infection. We found the frequency of delayed-onset swelling after cochlear implantation with different incision was statistically insignificant (P = 0.423). Nineteen patients (73.1%) were cured after one treatment, and five patients (19.2%) relapsed. Follow-up examinations at least 18 months after surgery revealed that all patients experienced a complete recovery. CONCLUSIONS: Delayed-onset swelling at the receiver site is a long term but not exactly uncommon complication after cochlear surgery and long-term follow-up is eagerly required. It can recur more than once, causing more complex treatment strategies in clinical practice. Conservative treatment first recommended, while needle aspiration should initially be considered in recurrent cases also when the effusion swelling is > 3 ml.


Asunto(s)
Implantación Coclear , Implantes Cocleares , Humanos , Lactante , Preescolar , Niño , Implantación Coclear/efectos adversos , Implantes Cocleares/efectos adversos , Complicaciones Posoperatorias/epidemiología , Complicaciones Posoperatorias/etiología , Complicaciones Posoperatorias/terapia , Estudios Retrospectivos , Cóclea
4.
Eur Arch Otorhinolaryngol ; 280(4): 1621-1627, 2023 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-36227348

RESUMEN

BACKGROUND: This study aimed to develop and validate a deep learning (DL) model to identify atelectasis and attic retraction pocket in cases of otitis media with effusion (OME) using multi-center otoscopic images. METHOD: A total of 6393 OME otoscopic images from three centers were used to develop and validate a DL model for detecting atelectasis and attic retraction pocket. A threefold random cross-validation procedure was adopted to divide the dataset into training validation sets on a patient level. A team of otologists was assigned to diagnose and characterize atelectasis and attic retraction pocket in otoscopic images. Receiver operating characteristic (ROC) curves, including area under the ROC curve (AUC), accuracy, sensitivity, and specificity were used to assess the performance of the DL model. Class Activation Mapping (CAM) illustrated the discriminative regions in the otoscopic images. RESULTS: Among all OME otoscopic images, 3564 (55.74%) were identified with attic retraction pocket, and 2460 (38.48%) with atelectasis. The diagnostic DL model of attic retraction pocket and atelectasis achieved a threefold cross-validation accuracy of 89% and 79%, AUC of 0.89 and 0.87, a sensitivity of 0.93 and 0.71, and a specificity of 0.62 and 0.84, respectively. Larger and deeper cases of atelectasis and attic retraction pocket showed greater weight, based on the red color depicted in the heat map of CAM. CONCLUSION: The DL algorithm could be employed to identify atelectasis and attic retraction pocket in otoscopic images of OME, and as a tool to assist in the accurate diagnosis of OME.


Asunto(s)
Aprendizaje Profundo , Otitis Media con Derrame , Otitis Media , Atelectasia Pulmonar , Humanos , Oído Medio , Otitis Media con Derrame/diagnóstico , Otitis Media con Derrame/diagnóstico por imagen , Membrana Timpánica
5.
Neural Plast ; 2021: 8855055, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-33883994

RESUMEN

Cochlear implantation is the first-line treatment for severe and profound hearing loss in children and adults. However, deaf patients with cochlear malformations or with cochlear nerve deficiencies are ineligible for cochlear implants. Meanwhile, the limited spatial selectivity and high risk of invasive craniotomy restrict the wide application of auditory brainstem implants. A noninvasive alternative strategy for safe and effective neuronal stimulation is urgently needed to address this issue. Because of its advantage in neural modulation over electrical stimulation, low-intensity ultrasound (US) is considered a safe modality for eliciting neural activity in the central auditory system. Although the neural modulation ability of low-intensity US has been demonstrated in the human primary somatosensory cortex and primary visual cortex, whether low-intensity US can directly activate auditory cortical neurons is still a topic of debate. To clarify the direct effects on auditory neurons, in the present study, we employed low-intensity US to stimulate auditory cortical neurons in vitro. Our data show that both low-frequency (0.8 MHz) and high-frequency (>27 MHz) US stimulation can elicit the inward current and action potentials in cultured neurons. c-Fos staining results indicate that low-intensity US is efficient for stimulating most neurons. Our study suggests that low-intensity US can excite auditory cortical neurons directly, implying that US-induced neural modulation can be a potential approach for activating the auditory cortex of deaf patients.


Asunto(s)
Corteza Auditiva/citología , Corteza Auditiva/efectos de la radiación , Neuronas/efectos de la radiación , Ultrasonido , Potenciales de Acción , Animales , Células Cultivadas , Implantes Cocleares , Sordera/terapia , Fenómenos Electrofisiológicos , Femenino , Células HEK293 , Humanos , Ratones , Ratones Endogámicos C57BL , Embarazo , Cultivo Primario de Células , Proteínas Proto-Oncogénicas c-fos/metabolismo
6.
Neural Plast ; 2020: 4576729, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32774355

RESUMEN

Music perception in cochlear implant (CI) users is far from satisfactory, not only because of the technological limitations of current CI devices but also due to the neurophysiological alterations that generally accompany deafness. Early behavioral studies revealed that similar mechanisms underlie musical and lexical pitch perception in CI-based electric hearing. Although neurophysiological studies of the musical pitch perception of English-speaking CI users are actively ongoing, little such research has been conducted with Mandarin-speaking CI users; as Mandarin is a tonal language, these individuals require pitch information to understand speech. The aim of this work was to study the neurophysiological mechanisms accounting for the musical pitch identification abilities of Mandarin-speaking CI users and normal-hearing (NH) listeners. Behavioral and mismatch negativity (MMN) data were analyzed to examine musical pitch processing performance. Moreover, neurophysiological results from CI users with good and bad pitch discrimination performance (according to the just-noticeable differences (JND) and pitch-direction discrimination (PDD) tasks) were compared to identify cortical responses associated with musical pitch perception differences. The MMN experiment was conducted using a passive oddball paradigm, with musical tone C4 (262 Hz) presented as the standard and tones D4 (294 Hz), E4 (330 Hz), G#4 (415 Hz), and C5 (523 Hz) presented as deviants. CI users demonstrated worse musical pitch discrimination ability than did NH listeners, as reflected by larger JND and PDD thresholds for pitch identification, and significantly increased latencies and reduced amplitudes in MMN responses. Good CI performers had better MMN results than did bad performers. Consistent with findings for English-speaking CI users, the results of this work suggest that MMN is a viable marker of cortical pitch perception in Mandarin-speaking CI users.


Asunto(s)
Encéfalo/fisiología , Encéfalo/fisiopatología , Implantes Cocleares , Sordera/fisiopatología , Sordera/psicología , Música , Discriminación de la Altura Tonal/fisiología , Estimulación Acústica , Adolescente , Adulto , Niño , Electroencefalografía , Femenino , Humanos , Masculino , Psicoacústica , Adulto Joven
7.
Neural Plast ; 2018: 5616930, 2018.
Artículo en Inglés | MEDLINE | ID: mdl-29849558

RESUMEN

The auditory function develops and matures after birth in many mammalian species. After hearing onset, environmental sounds exert profound and long-term effects on auditory functions. However, the effects of the acoustic environment on the functional development of the peripheral auditory system, especially the cochlear sensory hair cells, are still unclear. In the present study, we exposed mouse pups to frequency-enriched acoustic environments in postnatal days 0-14. The results indicated that the acoustic environment significantly decreased the threshold of the auditory brainstem response in a frequency-specific manner. Compared with controls, no difference was found in the number and alignment of inner and outer hair cells or in the length of hair bundles after acoustic overstimulation. The expression and function of prestin, the motor protein of outer hair cells (OHCs), were specifically increased in OHCs activated by acoustic stimulation at postnatal days 7-11. We analyzed the postnatal maturation of ribbon synapses in the hair cell areas. After acoustic stimulation, the number of ribbon synapses was closer to the mature stage than to the controls. Taken together, these data indicate that early acoustic exposure could promote the functional maturation of cochlear hair cells and the development of hearing.


Asunto(s)
Cóclea/crecimiento & desarrollo , Ambiente , Células Ciliadas Auditivas/fisiología , Audición , Sonido , Estimulación Acústica , Animales , Umbral Auditivo , Potenciales Evocados Auditivos del Tronco Encefálico , Femenino , Células Ciliadas Auditivas/ultraestructura , Masculino , Ratones Endogámicos C57BL , Proteínas Motoras Moleculares/metabolismo , Sinapsis/fisiología
8.
J Oral Pathol Med ; 45(6): 399-408, 2016 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-26493274

RESUMEN

BACKGROUND: p16 overexpression is a highly sensitive yet moderately specific biomarker for predicting human papillomavirus (HPV)-associated oropharyngeal squamous cell carcinoma (OPSCC). Nuclear ß-catenin translocation has been linked to HPV-positive OPSCC. However, whether the strategy of combining ß-catenin with p16 can better predict HPV-associated OPSCC remains unknown. METHODS: We evaluated the expression of p16 and ß-catenin (nuclear and membrane) by immunohistochemistry staining in 101 OPSCC tissues and HPV status by HPV DNA in situ hybridization. Logistic regression models were used to evaluate single or multiple biomarkers for HPV prediction. The prediction power, sensitivity, and specificity were determined by receiver operating characteristic (ROC) analyses. RESULTS: Our data showed that upon univariate analysis, p16 and nuclear ß-catenin were positively correlated with HPV status, while membrane ß-catenin was inversely correlated with HPV status (P < 0.01). p16 showed the highest HPV predictive power, with area under the curve (AUC) of 0.9074 compared to 0.6762 for nuclear ß-catenin and 0.7635 for membrane ß-catenin, respectively, indicating differential accuracies for HPV prediction. Multivariable analysis showed that p16 was significantly correlated with HPV, while nuclear and membrane ß-catenin showed marginal significance. The three-biomarker model was similarly sensitive (98.9% vs. 100%) but more specific (88.9% vs. 81%) than p16 alone, which also showed a good predictive value for overall (P = 0.0002) survival and disease-free (P = 0.0158) survival. CONCLUSION: Our study suggests a novel model of combining p16 and subcellular ß-catenin for prediction of HPV-associatred OPSCC, and this finding deserves further validation.


Asunto(s)
Biomarcadores de Tumor/biosíntesis , Carcinoma de Células Escamosas/diagnóstico , Inhibidor p16 de la Quinasa Dependiente de Ciclina/biosíntesis , Neoplasias de Cabeza y Cuello/diagnóstico , Neoplasias Orofaríngeas/diagnóstico , Papillomaviridae/aislamiento & purificación , Infecciones por Papillomavirus/diagnóstico , beta Catenina/biosíntesis , Adulto , Anciano , Carcinoma de Células Escamosas/metabolismo , Carcinoma de Células Escamosas/patología , Carcinoma de Células Escamosas/virología , ADN Viral/genética , Femenino , Neoplasias de Cabeza y Cuello/metabolismo , Neoplasias de Cabeza y Cuello/patología , Neoplasias de Cabeza y Cuello/virología , Humanos , Estimación de Kaplan-Meier , Masculino , Persona de Mediana Edad , Estadificación de Neoplasias , Neoplasias Orofaríngeas/metabolismo , Neoplasias Orofaríngeas/patología , Neoplasias Orofaríngeas/virología , Papillomaviridae/genética , Infecciones por Papillomavirus/metabolismo , Infecciones por Papillomavirus/patología , Infecciones por Papillomavirus/virología , Valor Predictivo de las Pruebas , Carcinoma de Células Escamosas de Cabeza y Cuello
9.
Carcinogenesis ; 36(11): 1397-406, 2015 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-26354779

RESUMEN

Human papillomavirus (HPV) is the causative agent of a subgroup of head and neck cancer characterized by an intrinsic radiosensitivity. HPV initiates cellular transformation through the activity of E6 and E7 proteins. E6 and E7 expression is necessary but not sufficient to transform the host cell, as genomic instability is required to acquire the malignant phenotype in HPV-initiated cells. This study reveals a key role played by oxidative stress in promoting genomic instability and radiosensitivity in HPV-positive head and neck cancer. By employing an isogenic human cell model, we observed that expression of E6 and E7 is sufficient to induce reactive oxygen species (ROS) generation in head and neck cancer cells. E6/E7-induced oxidative stress is mediated by nicotinamide adenine dinucleotide phosphate oxidases (NOXs) and causes DNA damage and chromosomal aberrations. This mechanism for genomic instability distinguishes HPV-positive from HPV-negative tumors, as we observed NOX-induced oxidative stress in HPV-positive but not HPV-negative head and neck cancer cells. We identified NOX2 as the source of HPV-induced oxidative stress as NOX2 silencing significantly reduced ROS generation, DNA damage and chromosomal aberrations in HPV-positive cells. Due to their state of chronic oxidative stress, HPV-positive cells are more susceptible to DNA damage induced by ROS and ionizing radiation (IR). Furthermore, exposure to IR results in the formation of complex lesions in HPV-positive cells as indicated by the higher amount of chromosomal breakage observed in this group of cells. These results reveal a novel mechanism for sustaining genomic instability in HPV-positive head and neck tumors and elucidate its contribution to their intrinsic radiosensitivity.


Asunto(s)
Daño del ADN , Neoplasias de Cabeza y Cuello/virología , Glicoproteínas de Membrana/fisiología , NADPH Oxidasas/fisiología , Proteínas Oncogénicas Virales/fisiología , Estrés Oxidativo , Proteínas E7 de Papillomavirus/fisiología , Proteínas Represoras/fisiología , Carcinogénesis/metabolismo , Línea Celular Tumoral , Susceptibilidad a Enfermedades , Inestabilidad Genómica , Neoplasias de Cabeza y Cuello/genética , Humanos , NADPH Oxidasa 2 , Especies Reactivas de Oxígeno/metabolismo
10.
Cancer ; 121(2): 214-25, 2015 Jan 15.
Artículo en Inglés | MEDLINE | ID: mdl-25209444

RESUMEN

BACKGROUND: To understand the mechanism of frequent and early lymph node metastasis in high-risk human papillomavirus (HPV)-associated oropharyngeal squamous cell carcinoma (OPSCC), this study investigated whether ß-catenin is regulated by the HPV oncoprotein and contributes to OPSCC metastasis. METHODS: Expression levels of p16, ß-catenin, and epidermal growth factor receptor (EGFR) were examined in OPSCC samples (n = 208) by immunohistochemistry. The expression and subcellular localization of ß-catenin and EGFR activation were also studied in HPV-positive and HPV-negative head and neck squamous cell carcinoma cell lines with western blot analysis. HPV16 E6 small interfering RNA was used to elucidate the effect of the HPV oncoprotein on ß-catenin translocation. The involvement of EGFR in ß-catenin translocation was confirmed by treatment with erlotinib. Moreover, the invasive capacity was evaluated after HPV16 E6/E7 repression. RESULTS: The results showed that the membrane weighted index of ß-catenin was inversely correlated with p16 positivity (P < .001) and lymph node metastasis (P = .026), whereas nuclear staining of ß-catenin was associated with p16-positive OPSCC (P < .001). A low level of membrane ß-catenin expression was significantly associated with disease-free and overall survival (P < .0001 in both cases). Furthermore, the membrane weighted index of EGFR was inversely correlated with p16 positivity (P < .001) and positively correlated with membrane ß-catenin (P < .001). The in vitro study showed that HPV16 E6 repression led to reductions of phospho-EGFR and nuclear ß-catenin, which were also observed after erlotinib treatment, and inhibition of invasion. CONCLUSIONS: The findings suggest that HPV16 E6 mediates the translocation of ß-catenin to the nucleus, which may be regulated by activated EGFR.


Asunto(s)
Carcinoma de Células Escamosas/metabolismo , Receptores ErbB/metabolismo , Proteínas Oncogénicas Virales/metabolismo , Neoplasias Orofaríngeas/metabolismo , Proteínas E7 de Papillomavirus/metabolismo , Proteínas Represoras/metabolismo , Translocación Genética , beta Catenina/genética , Adulto , Anciano , Anciano de 80 o más Años , Antineoplásicos/uso terapéutico , Biomarcadores de Tumor/metabolismo , Western Blotting , Carcinoma de Células Escamosas/mortalidad , Carcinoma de Células Escamosas/patología , Línea Celular Tumoral , Receptores ErbB/antagonistas & inhibidores , Receptores ErbB/genética , Clorhidrato de Erlotinib , Femenino , Regulación Neoplásica de la Expresión Génica , Humanos , Inmunohistoquímica , Estimación de Kaplan-Meier , Metástasis Linfática/genética , Metástasis Linfática/patología , Masculino , Persona de Mediana Edad , Neoplasias Orofaríngeas/mortalidad , Neoplasias Orofaríngeas/patología , Valor Predictivo de las Pruebas , Pronóstico , Quinazolinas/uso terapéutico , ARN Interferente Pequeño/metabolismo , Reacción en Cadena de la Polimerasa de Transcriptasa Inversa , beta Catenina/análisis , beta Catenina/metabolismo
11.
Bull Environ Contam Toxicol ; 93(2): 171-6, 2014 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-24789526

RESUMEN

Accumulation and distribution of Zn and Cd in the hyperaccumulator plant Sedum plumbizincicola were investigated in a hydroponic experiment. Mean Cd and Zn concentrations in shoots (7,010 and 18,400 mg kg(-1)) were about sevenfold and fivefold higher than those in roots (840 and 3,000 mg kg(-1)) after exposure to 100 µM CdSO4 and 600 µM ZnSO4, respectively. Cd and Zn concentrations in young leaves (4,330 and 9,820 mg kg(-1)) were about sixfold and twofold higher than those in mature leaves (636 and 2,620 mg kg(-1)), respectively. MicroPIXE analysis showed that Zn was predominantly localized in epidermal cells in both young and mature leaves, but large amounts of Zn occurred in mesophyll cells in young leaves. Leaf tissue fractionation showed that soluble and cell wall fractions were different at the two stages of leaf growth. Young and mature leaves of S. plumbizincicola also showed different accumulation and distribution characteristics for Zn and Cd.


Asunto(s)
Cadmio/metabolismo , Hojas de la Planta/metabolismo , Raíces de Plantas/metabolismo , Sedum/metabolismo , Zinc/metabolismo , Cadmio/análisis , Hidroponía , Hojas de la Planta/química , Raíces de Plantas/química , Zinc/análisis
12.
Artículo en Zh | MEDLINE | ID: mdl-38563182

RESUMEN

Various inner ear diseases such as sensorineural deafness and Meniere's disease bring about problems such as speech communication disorders and decreased work efficiency, which seriously affect the life quality of patients. Due to the special anatomical structure and blood-labyrinth barrier in the inner ear, the current drug administration methods are often unable to achieve satisfactory results. Nanocarriers are the forefront and hot spot of nanotechnology research. In recent years, a lot of research progress has been made in the field of targeted delivery of the inner ear, which is expected to be eventually applied to the treatment of clinical diseases of the inner ear. This review focuses on the advantages, main research achievements and limitations of various nanocarriers in the targeted delivery of the inner ear, hoping to provide new ideas for related research.


Asunto(s)
Oído Interno , Pérdida Auditiva Sensorineural , Enfermedades del Laberinto , Enfermedad de Meniere , Humanos , Enfermedad de Meniere/tratamiento farmacológico , Calidad de Vida
13.
Biomater Adv ; 157: 213736, 2024 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-38128170

RESUMEN

Cochlear implantation (CI) is the primary intervention for patients with sensorineural hearing loss to restore their hearing. However, approximately 90 % of CI recipients experience unexpected fibrosis around the inserted electrode arrays due to acute and chronic inflammation. This fibrosis leads to progressive residual hearing loss. Addressing this complication is crucial for enhancing CI outcomes, yet an effective treatment has not yet been found. In this study, we developed a multifunctional dexamethasone (DXM)-loaded polytrimethylene carbonate (PTMC) electrode coating to mitigate inflammatory reactions and fibrosis after CI. This thin and flexible coating could preserve the mechanical performance of the electrode and reduce the implantation resistance for CI. The in vitro release studies demonstrated the DXM-PTMC coating's efficient drug loading and sustained release capability over 90 days. DXM-PTMC also showed long-term stability, high biocompatibility, and effective anti-inflammatory effects in vitro and in vivo. Compared with the uncoated group, DXM-PTMC coating significantly inhibited the expression of inflammatory factors, such as NO, TNF-α, IL-1ß, and IL-6. DXM-PTMC coating suppressed fibrosis in rat implantation models for 3 weeks by reducing both acute and chronic inflammation. Our findings suggest that DXM-PTMC coating is a novel strategy to improve the outcomes of CI.


Asunto(s)
Implantación Coclear , Implantes Cocleares , Humanos , Ratas , Animales , Implantes Cocleares/efectos adversos , Dexametasona/farmacología , Dexametasona/uso terapéutico , Inflamación/tratamiento farmacológico , Fibrosis
14.
Laryngoscope ; 134(7): 3293-3301, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-38193513

RESUMEN

OBJECTIVE: To investigate whether there is a correlation between the inflammatory state and the pathogenesis and clinical features of sudden hearing loss (SHL) by studying the expression of inflammation-related cytokines in the peripheral blood of patients with SHL. METHODS: In this work, we analyzed the cytokine profiles of 48 analytes in 38 patients with SHL compared to 38 healthy donors using a multiplex immunoassay. This study used appropriate statistical methods to screen for inflammatory cytokines associated with the pathogenesis of SHL, to analyze their network correlation, and to analyze the relationship between clinical features of SHL and inflammatory cytokines. RESULTS: Several cytokines, including CTACK, Eotaxin, HGF, INF-α2, IFN-ß, IL-1ß, IL-1ra, IL-2Rα, IL-4, IL-7, IL-8, IL-9, IL-10, IL-12(p40), IL-13, MIG, ß-NGF, SCF, and TNF-α, exhibited significantly higher levels in the peripheral blood of the SHL group compared to the control group. An inflammatory network composed of multiple cytokines, including IL-1ß, is a risk factor for the development of SHL. CONCLUSION: This study identified several inflammatory cytokines with elevated expression, which may be linked with the onset of SHL. The results of this study also provide a basis for the theoretical hypothesis of inflammation in SHL. LEVEL OF EVIDENCE: 3 Laryngoscope, 134:3293-3301, 2024.


Asunto(s)
Citocinas , Pérdida Auditiva Súbita , Humanos , Pérdida Auditiva Súbita/sangre , Pérdida Auditiva Súbita/inmunología , Citocinas/sangre , Femenino , Masculino , Persona de Mediana Edad , Adulto , Estudios de Casos y Controles , Inflamación/sangre , Anciano , Biomarcadores/sangre
15.
Int J Biol Macromol ; 244: 125169, 2023 Jul 31.
Artículo en Inglés | MEDLINE | ID: mdl-37270131

RESUMEN

In this study, three-dimensional (3D) carboxymethylcellulose sodium (CMC) aerogel was decorated with NiCo bimetallic and the corresponding monometallic organic frameworks to prepare MOFs-CMC composite adsorbents for the removal of Cu2+. The obtained MOFs-CMC composite including Ni/Co-MOF-CMC, Ni-MOF-CMC, and Co-MOF-CMC were characterized by SEM, FT-IR, XRD, XPS analysis, and zeta potential. The adsorption behavior of MOFs-CMC composite for Cu2+ was explored by batch adsorption test, adsorption kinetics and adsorption isotherms. The experimental data satisfied the pseudo-second-order model and Langmuir isotherm model. The maximum adsorption capacities followed the sequence of Ni/Co-MOF-CMC (233.99 mg/g) > Ni-MOF-CMC (216.95 mg/g) > Co-MOF-CMC (214.38 mg/g), indicating that there was a synergistic effect between Ni and Co to promote the adsorption of Cu2+. Combining characterization analysis and density functional theory (DFT) calculation, it is clarified that the adsorption mechanism of MOFs-CMC for Cu2+ includes ion exchange, electrostatic interactions, and complexation.


Asunto(s)
Carboximetilcelulosa de Sodio , Contaminantes Químicos del Agua , Adsorción , Espectroscopía Infrarroja por Transformada de Fourier , Contaminantes Químicos del Agua/análisis , Cinética
16.
Laryngoscope Investig Otolaryngol ; 8(5): 1390-1400, 2023 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-37899874

RESUMEN

Objectives: The implanted electrodes deliver electric signals to spiral ganglion neurons, conferring restored hearing of cochlear implantation (CI) recipients. Postimplantation intracochlear fibrosis, which is observed in most CI recipients, disturbs the electrical signals and impairs the long-term outcome of CI. The macrophages and fibroblasts activation is critical for the development of intracochlear fibrosis. However, the effect of electric stimulation of cochlear implant (ESCI) on the activity of macrophages and fibroblasts was unclear. In the present study, a human cochlear implant was modified to stimulate cultured macrophages and fibroblasts. Methods: By measuring cellular marker and the expression level of cytokine production, the polarization and activity of macrophages and fibroblasts were examined with or without ESCI. Results: Our data showed that ESCI had little effects on the morphology, density, and distribution of culturing macrophages and fibroblasts. Furthermore, ESCI alone did not affect the polarization of macrophages or the function of fibroblasts without the treatment of inflammatory factors. However, in the presence of LPS or IL-4, ESCI further promoted the polarization of macrophages, and increased the expression of pro-inflammatory or anti-inflammatory factors, respectively. For fibroblasts, ESCI further increased the collagen I synthesis induced by TGF-ß1 treatment. Nifedipine inhibited ESCI induced calcium influx, and hereby abolished the promoted polarization and activation of macrophages and fibroblasts. Conclusion: Our results suggest that acute inflammation should be well inhibited before the activation of cochlear implants to control the postoperative intracochlear fibrosis. The voltage-gated calcium channels could be considered as the targets for reducing postimplantation inflammation and fibrosis. Level of Evidence: NA.

17.
Environ Technol ; 44(21): 3183-3195, 2023 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-35286239

RESUMEN

Graphene oxide (GO), an important derivative of graphene, with a variety of active oxygen-containing groups (hydroxyl, carboxyl and epoxy) on its surface is easy to be functionalized to obtain adsorbent with high adsorption capacity. To date, the adsorption behaviour of organic pollutants by functionalized GO adsorbents have been extensively studied, but there has been no systematic review regarding the functionalization method of GO for the purpose to remove organic pollutants from wastewater. The leading objective of this review is to (i) summarize the functionalization strategies of GO for organic pollutants removal (covalent functionalization and non-covalent functionalization), (ii) evaluate the adsorption performance of functional GO towards organic pollutants by taking aromatic pollutants and dyes as examples and (iii) discuss the regeneration property and adsorption mechanism of functional GO adsorbent. In addition, the problems of existing studies and future research directions are also identified briefly.


Asunto(s)
Contaminantes Ambientales , Grafito , Aguas Residuales , Colorantes
18.
Adv Healthc Mater ; 12(1): e2200807, 2023 01.
Artículo en Inglés | MEDLINE | ID: mdl-36177664

RESUMEN

Since the first surgery 50 years ago, cochlear implantation (CI) is the major treatment for patients with severe sensorineural hearing loss. However, unexpected foreign body reactions (FBRs) after surgery are reported in 90% of CI recipients, resulting in the formation of fibrosis in the cochlea and progressive residual hearing loss. Zwitterion modification is universally used to reduce bio-fouling and suppress FBRs but never for CI. In the present study, a zwitterionic coating is developed, which is composed of poly sulfobetaine methacrylate (PSB) and polydopamine (PDA) for cochlear implants. The PSB-PDA coating shows a series of characters for an ideal anti-FBRs material, including super-hydrophilicity, low protein and cell adsorption, long-term stability, and high biocompatibility. Compared to the uncoated controls, PSB-PDA coating inhibits the activation of macrophages and reduces the release of inflammatory factors (TNF-α, IL-1ß, NO) and fibrosis-related factors (TGF-ß1, α-SMA, collagen I). PSB-PDA coated electrode arrays suppress fibrosis completely and preserve residual hearing significantly in rat CI models. These results suggest that PSB-PDA coating is a novel strategy for anti-fibrosis to improve the outcomes of CI.


Asunto(s)
Implantación Coclear , Implantes Cocleares , Pérdida Auditiva , Ratas , Animales , Implantación Coclear/efectos adversos , Pérdida Auditiva/etiología , Implantes Cocleares/efectos adversos , Polímeros/farmacología
19.
Mater Today Bio ; 23: 100856, 2023 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-38075255

RESUMEN

The cochlear implant (CI), an advanced electronic device replacing the entire cochlear function, is the ultimate treatment for over 466 million people with disabling hearing loss. Infection after cochlear implantation is a common and worrisome complication despite the routine administration of the antibiotic. The bacterial biofilms formed on the surface of CI are the main cause of antibiotic failure. To solve this problem, we developed a copper-containing zwitterionic coating consisting of anti-adherent poly sulfobetaine methacrylate (PSB) and steadfast polydopamine (PDA). CuSO4/H2O2. was added to accelerate this co-deposition reaction and enhance the anti-bacterial property. The preparation method was simple, rapid, and suitable for clinical use. In our in vitro and in vivo studies, the PSB/PDA(Cu) coating showed high biocompatibility, and conferred CI implants excellent anti-inflammatory, strong anti-bacterial effects, and great anti-biofilm properties to representative Gram-positive and Gram-negative bacteria. These findings implied that the PSB/PDA(Cu) coating was a unique anti-bacterial strategy for enhancing CI performance.

20.
Health Inf Sci Syst ; 11(1): 11, 2023 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-36733469

RESUMEN

Purpose: In order to meet restrictions and difficulties in the development of hospital medical informatization and clinical databases in China, in this study, a disease-specific clinical database system (DSCDS) was designed and built. It provides support for the full utilization of real world medical big data in clinical research and medical services for specific diseases. Methods: The development of DSCDS involved (1) requirements analysis on precision medicine, medical big data, and clinical research; (2) design schematics and basic architecture; (3) standard datasets of specific diseases consisting of common data elements (CDEs); (4) collection and aggregation of specific disease data scattered in various medical business systems of the hospital; (5) governance and quality improvement of specific disease data; (6) data storage and computing; and (7) design of data application modules. Results: A DSCDS for liver cirrhosis was created in the gastrointestinal department of a 3A grade hospital in China and had more than nine data application modules. Based on this DSCDS, a series of clinical studies are being carried out, such as retrospective or prospective cohorts, prognostic studies using multimodal data, and follow-up studies. Conclusion: The development of the DSCDS for liver cirrhosis in this paper provides experience and reference for the design and development of DSCDSs for other specific diseases in China; it can even expand to the development of DSCDSs in other countries if they have the demand for DSCDS and the same or better medical informatization foundation. DSCDS has more accurate, standard, comprehensive, multimodal and usable data of specific diseases than the general clinical database system and clinical data repository (CDR) and provides a credible data foundation for medical research, clinical decision-making and improving the medical service quality of specific diseases. Supplementary Information: The online version contains supplementary material available at 10.1007/s13755-023-00211-4.

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