Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 39
Filtrar
Mais filtros










Base de dados
Intervalo de ano de publicação
8.
Genes (Basel) ; 13(10)2022 Sep 24.
Artigo em Inglês | MEDLINE | ID: mdl-36292601

RESUMO

(1) Background: Several studies showed a sustained temperature of 47 °C or 50 °C for one minute resulted in vascular stasis and bone resorption with only limited bone regrowth over a 3-4-week healing period. The purpose of the present study was to evaluate the temperature changes (ΔΤ) that occur during the preparation of dental implant osteotomies using MIS® straight drills versus Densah® burs in a clockwise (cutting) drilling protocol. (2) Methods: Two hundred forty (240) osteotomies of two different systems' drills were prepared at 6 mm depth at 800, 1000, and 1200 revolutions per minute (RPM), in fresh, unembalmed tibiae, obtained by a female cadaver. ΔΤ was calculated by subtracting the baseline temperature on the tibial surface, from the maximum temperature-inside the osteotomy (ΔT = Tmax - Tbase). The variables were evaluated both for their individual and for their synergistic effect on ΔΤ with the use of one-, two-, three- and four-way interactions; (3) Results: An independent and a three-way interaction (drill design, drill width, and RPM) was found in all three RPM for the Densah® burs and at 1000 RPM for the MIS® straight drills. As Densah® burs diameter increased, ΔΤ decreased. The aforementioned pattern was seen only at 1000 RPM for the MIS® straight drills. The usage of drills 20 times more than the implant manufacturers' recommendation did not significantly affect the ΔΤ. A stereoscopic examination of the specimens confirmed the findings. (4) Conclusions: The independent and synergistic effect of drills' diameter, design and RPM had a significant effect on ΔΤ in human tibiae, which never exceeded the critical threshold of 47 °C.


Assuntos
Implantes Dentários , Humanos , Feminino , Temperatura , Osteotomia , Tíbia/cirurgia , Cadáver
9.
Int J Dermatol ; 61(10): e374-e376, 2022 10.
Artigo em Inglês | MEDLINE | ID: mdl-35538701
10.
Oxid Med Cell Longev ; 2022: 8918966, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35340209

RESUMO

Parkinson's disease (PD) is an age-related neurodegenerative disorder characterized by progressive deterioration of motor function and loss of dopaminergic neurons in the substantia nigra. Although PD is more common in people over 60 years old, people with young-onset PD tend to increase recently. Up to now, there is no cure for PD; therapies mainly focus on reducing symptoms and improving patient quality of life. Thus, the requirement of exploring new medications is needed. There is a strong relationship between oxidative stress and PD. Therefore, antioxidant compounds have been considered as a novel therapy for PD. In this study, we indicated a new potential candidate for PD treatment, rumdul fruit (Sphaerocoryne affinis-a member of the Annonaceae family), due to evaluating its activities on the fly model of Parkinson. Our experimental results showed that rumdul fruit water extract (RFWE) has a strong antioxidant capacity with IC50 value in DPPH assay which was 85.62 ± 1.05 µg/mL. The use of RFWE at concentrations of 3, 6, and 12 mg/mL could strongly ameliorate the locomotor disabilities and dopaminergic neuron degeneration. Although the RFWE at high concentrations like 12 mg/mL and 18 mg/mL could induce some side effects on fly development and viability, our data strongly demonstrated that RFWE effectively rescued PD phenotypes on the fly model. Although component in the plant extract, as well as the molecular mechanism helping to recover the phenotype, has not been elucidated yet, the research contributed strong scientific evidence for further research on applying rumdul as a novel natural source for PD treatment.


Assuntos
Annonaceae , Doença de Parkinson , Antioxidantes/farmacologia , Antioxidantes/uso terapêutico , Neurônios Dopaminérgicos , Humanos , Doença de Parkinson/tratamento farmacológico , Qualidade de Vida
18.
Mult Scler Relat Disord ; 55: 103169, 2021 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-34333272

RESUMO

BACKGROUND: Neuropsychiatric symptoms and CSF cytokine, chemokine, and SARS-COV-2 antibody profiles are unknown in pediatric patients with COVID-19 or multisystem inflammatory syndrome (MIS-C), (NP-COVID-19). METHODS: Children at a single pediatric institution quaternary referral center with laboratory-confirmed COVID-19 or MIS-C and neuropsychiatric symptoms were included in this retrospective case series. Clinical symptoms, ancillary testing data, treatments and outcomes are described. Multiplexed electrochemiluminescence assays for cytokines, chemokines and SARS-CoV-2 antibodies were tested in the CSF NP-COVID-19 patients compared to five controls and were analyzed using the Student's t-test. RESULTS: Three of five NP-COVID-19 patients had psychiatric symptoms, and two patients had encephalopathy and seizures. All patients had full or near resolution of neuropsychiatric symptoms by discharge. One patient received intravenous steroids for treatment for psychiatric symptoms; 3/5 other patients received immunotherapy for MIS-C, including IVIG, high-dose steroids, anakinra, and tocilizumab. Pro-inflammatory chemokines, including MIG, MPC, MIP-1ß, and TARC were significantly elevated in NP-COVID-19 patients compared to controls. Two of five patients had elevated CSF neurofilament light chain. CSF SARS-CoV-2 antibody titers to the full-length spike, receptor binding domain and N-terminal domain were significantly elevated. SARS-CoV-2 antibody titers strongly correlated with pro-inflammatory chemokines/cytokines, including IL-1ß, IL-2, IL-8, TNF-α, and IFN-γ (P≤0.05 for all). CONCLUSIONS: A spectrum of neuropsychiatric clinical manifestations can occur in children with SARS-CoV-2 infection. CSF pro-inflammatory chemokines and SARS-CoV-2 antibodies may serve as biomarkers of SARS-CoV-2 mediated NP-COVID-19. Additional study is required to understand the pathophysiologic mechanisms of neuroinflammation in children with COVID-19 and MIS-C.


Assuntos
COVID-19 , SARS-CoV-2 , COVID-19/complicações , Quimiocinas , Criança , Citocinas , Humanos , Estudos Retrospectivos , Síndrome de Resposta Inflamatória Sistêmica
19.
Am J Dermatopathol ; 43(8): 579-582, 2021 08 01.
Artigo em Inglês | MEDLINE | ID: mdl-33989211

RESUMO

ABSTRACT: Parenteral gold has historically been used to treat several conditions, including rheumatoid arthritis. Gold administration leads to a variety of cutaneous reactions, including chrysiasis, which is a permanent blue-grey hyperpigmentation of the skin due to dermal gold deposition. In this report, we describe the case of a patient who received parenteral gold injections 22 years before the onset of her chrysiasis for the treatment of rheumatoid arthritis. Biopsy of the macules showed dermal gold deposits aggregating around a melanocytic nevus, as well as around preexisting osteoma cutis. To the authors' knowledge, this is the first report in the literature describing a case of chrysiasis with gold deposits concentrated around a melanocytic nevus and an area of osteoma cutis.


Assuntos
Antirreumáticos/efeitos adversos , Aurotioglucose/efeitos adversos , Dermatoses Faciais/patologia , Hiperpigmentação/patologia , Nevo Pigmentado/patologia , Neoplasias Cutâneas/patologia , Artrite Reumatoide/tratamento farmacológico , Doenças Ósseas Metabólicas/complicações , Dermatoses Faciais/induzido quimicamente , Feminino , Ouro , Humanos , Hiperpigmentação/induzido quimicamente , Pessoa de Meia-Idade , Nevo Pigmentado/complicações , Ossificação Heterotópica/complicações , Dermatopatias Genéticas/complicações , Neoplasias Cutâneas/complicações
20.
Expert Opin Investig Drugs ; 30(5): 505-518, 2021 May.
Artigo em Inglês | MEDLINE | ID: mdl-33721548

RESUMO

Background: COVID-19 has several overlapping phases. Treatments to date have focused on the late stage of disease in hospital. Yet, the pandemic is by propagated by the viral phase in out-patients. The current public health strategy relies solely on vaccines to prevent disease.Methods: We searched the major national registries, pubmed.org, and the preprint servers for all ongoing, completed and published trial results.Results: As of 2/15/2021, we found 111 publications reporting findings on 14 classes of agents, and 9 vaccines. There were 62 randomized controlled studies, the rest retrospective observational analyses. Only 21 publications dealt with outpatient care. Remdesivir and high titer convalescent plasma have emergency use authorization for hospitalized patients in the U.S.A. There is also support for glucocorticoid treatment of the COVID-19 respiratory distress syndrome. Monoclonal antibodies are authorized for outpatients, but supply is inadequate to treat all at time of diagnosis. Favipiravir, ivermectin, and interferons are approved in certain countries.Expert Opinion: Vaccines and antibodies are highly antigen specific, and new SARS-Cov-2 variants are appearing. We call on public health authorities to authorize treatments with known low-risk and possible benefit for outpatients in parallel with universal vaccination.


Assuntos
Vacinas contra COVID-19/administração & dosagem , COVID-19/terapia , Assistência Ambulatorial/métodos , Anticorpos Monoclonais/administração & dosagem , COVID-19/diagnóstico , COVID-19/prevenção & controle , Hospitalização , Humanos , Imunização Passiva , Ensaios Clínicos Controlados Aleatórios como Assunto , Fatores de Tempo , Tratamento Farmacológico da COVID-19 , Soroterapia para COVID-19
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...