Αρχειοθήκη ιστολογίου

Κυριακή 15 Ιανουαρίου 2023

Baricitinib or imatinib in hospitalized COVID‐19 patients: results from COVINIB, an exploratory randomized clinical trial.

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ABSTRACT

Background

Baricitinib and imatinib are considered therapies for COVID-19, but their ultimate clinical impact remains to be elucidated, so our objective is to determine whether these kinase inhibitors provide benefit when added to standard care in hospitalized COVID-19 patients.

Methods

Phase-2, open-label, randomized trial with a pick-the-winner design conducted from September 2020 to June 2021 in a single Spanish center. Hospitalized adults with COVID-19 pneumonia and a symptom duration ≤ 10 days were assigned to 3 arms: imatinib (400 mg qd, 7 days) plus standard-care, baricitinib (4 mg qd, 7 days) plus standard-care, or standard-care alone. Primary outcome was time to clinical improvement (discharge alive or a reduction of 2 points in an ordinal scale of clinical status) compared on a day-by-day basis in order to identify differences ≥ 15% between the most and least favorable groups. Secondary outcomes included oxygenation and ventilatory support requirements, additional therapies administered all-cause mortality and safety.

Results

165 patients analyzed. Predefined criteria for selection of the most advantageous arm were met for baricitinib, but not for imatinib. However, no statistically significant differences were observed in formal analysis, but a trend towards better results in patients receiving baricitinib was found compared to standard care alone (HR for clinical improvement 1.41, 95%CI 0.96-2.06; HR for discontinuing oxygen 1.46, 95%CI 0.94-2.28). No differences were found regarding additional therapies administered or safety.

Conclusions

Baricitinib plus standard care showed better results for hospitalized COVID-19 patients, being the most advantageous therapeutic strategy among those proposed in this exploratory clinical trial.

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Dentine thickness in maxillary fused molars depends on the fusion type: An ex vivo micro‐CT study

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Abstract

Aim

The present study aimed to determine and compare the dentine thickness around the root canals of maxillary molars with fusion using micro-computed tomography (micro-CT).

Methodology

A total of 120 fused maxillary molars having more than a single canal with distinct canal orifices near the cementoenamel junction were selected from a pool of extracted maxillary molars, which were scanned on a micro-CT device (SkyScan 1172, Bruker-microCT, Kontich, Belgium). The minimum dentine thickness around the root canals in furcal direction was measured using CTAn software (v.1.18.8 Bruker-microCT) at each millimetre. The specimens were grouped according to their fusion type, and dentine thickness around the canals was compared. The data were statistically analysed using ANOVA and post hoc Tukey-Kramer tests following an assessment of the normality of their distribution with the Kolmogorov-Smirnov test (p .05).

Results

Dentine thickness showed a statistically significant decrease at 2 mm below the orifice irrespective of fusion type. The minimum dentine thickness values were detected around the second mesiobuccal canal as 0.30 mm at 6 mm below orifice. Dentine thickness around the mesiobuccal canal significantly greater in fusion type 1 than those of types 2 and 3 (p < .05), while those of distobuccal and palatal canals were significantly thinner in type 3 fusion compared to type 1 or 6 (p < .05).

Conclusion

Minimum dentine thickness values at the danger zone of distobuccal and palatal canals change according to the fusion type in fused maxillary second molars.

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Πέμπτη 12 Ιανουαρίου 2023

Epstein–Barr Virus‐Positive Hemophagocytic Lymphohistiocytosis Following COVID‐19 Vaccination in a Pediatric Patient

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Oncologic Outcomes After Clinically Node-Negative Salvage Laryngectomy

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This cohort study investigates the association of electiv e neck dissection vs observation with oncologic outcomes among patients who received clinically node-negative salvage total laryngectomy.
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Brief Tele–Cognitive Behavioral Treatment for Head and Neck Cancer Survivors With Body Image Distress

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This randomized clinical trial evaluates the acceptabilit y and preliminary efficacy of BRIGHT (Building a Renewed ImaGe after Head and neck cancer Treatment), a brief tele–cognitive behavioral therapy, at reducing body image distress among survivors of head and neck cancer.
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Auricular Reconstruction for Relapsing Polychondritis

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This case report describes a woman in her early 20s who p resented to the hospital with an acquired auricular deformity after an ear piercing and was diagnosed with recurrent polychondritis that required total auricular reconstruction.
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Wide-Field Optical Coherence Tomography to Evaluate Tissue in Oral Cavity and Oropharynx

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This qualitative study compares wide-field optical cohere nce tomography imaging with standard hematoxylin and eosin slides for margin analysis in squamous cell carcinoma of the oral cavity and oropharynx.
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Long-term Outcomes of Turbinate Surgery in Patients With Allergic Rhinitis

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This systematic review and meta-analysis investigates the long-term outcomes and safety of turbinate surgery in patients with medically refractory allergic rhinitis.
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Somatic genomic imbalances in ‘tumour-free’ surgical margins of oral cancer

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Up to 30% of oral squamous cell carcinoma (OSCC) patients develop local recurrence and distant metastasis. The molecular status of histologically cancer-free tumour margins could be a critical factor in predicting tumour behaviour. The aim of this study was to detect somatic genomic imbalances in OSCC with emphasis on the surgical margins. DNA was isolated from tumour tissues, margin tissues, and blood samples (used as control) obtained from 11 OSCC patients, and genome-wide array comparative genomic hybridization was performed. (Source: International Journal of Oral and Maxillofacial Surgery)
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Τετάρτη 11 Ιανουαρίου 2023

Inhibiting Cardiac Autophagy Suppresses Zika Virus Replication

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Abstract

Zika Virus (ZIKV) infection is a global threat. Other than the congenital neurological disorders it causes, ZIKV infection has been reported to induce cardiac complications. However, the precise treatment plans are unclear. Thus, illustrating the pathogenic mechanism of ZIKV in the heart is critical to providing effective prevention and treatment of ZIKV infection. The mechanism of autophagy has been reported recently in Dengue virus infection. Whether or not autophagy participates in ZIKV infection and its role remains unrevealed. This study successfully established the in vitro cardiomyocytes and in vivo mouse models of ZIKV infection to investigate the involvement of autophagy in ZIKV infection. The results showed that ZIKV infection is both time and gradient-dependent. The key autophagy protein, LC3B, increased remarkably after ZIKV infection. Meanwhile, autophagic flux was detected by immunofluorescence. Applying autophagy inhibitors decreased the LC3B levels. F urthermore, the number of viral copies was quantified to evaluate the influence of autophagy during infection. We found that autophagy was actively involved in the ZIKV infection and the inhibition of autophagy could effectively reduce the viral copies, suggesting a potential intervention strategy for reducing ZIKV infection and the undesired complications caused by ZIKV.

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Needle‐free injection system delivery of ZyCoV‐D DNA vaccine demonstrated improved immunogenicity and protective efficacy in Rhesus macaques against SARS‐CoV‐2

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Abstract

The apprehension of needles related to injection site pain, risk of transmitting the blood borne pathogens and effective mass immunization have led to the development of needle free injection system (NFIS). Here, we evaluated the efficacy of the NFIS and needle injection system (NIS) for the delivery and immunogenicity of DNA vaccine candidate ZyCOV-D in Rhesus macaques against SARS-CoV-2 infection. Briefly, twenty rhesus macaques were divided into five groups (4 animals each) i.e., I (1 mg dose by NIS), II (2mg dose by NIS), III [1mg dose by NFIS], IV (2mg dose by NFIS) and V (phosphate-buffer saline). The macaques were immunized with the vaccine candidates/PBS intradermally on day 0, 28 and 56. Subsequently, the animals were challenged with live SARS-CoV-2 after 15 weeks of the first immunization. Blood, nasal swab, throat swab, and bronchoalveolar lavage fluid specimens were collected on 0, 1, 3, 5 and 7 days post infection from each animal to determine immune response and vira l clearance. Amongst all the five groups, 2mg dose by NFIS elicited significant titers of IgG and neutralizing antibody after immunization with enhancement in their titers post virus challenge. Besides this, it also induced increased lymphocyte proliferation and cytokine response. The minimal viral load post-SARS-CoV-2 challenge and significant immune response in the immunized animals demonstrated efficiency of NFIS in delivering 2mg ZyCOV-D vaccine candidate.

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