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1.
Int J Nanomedicine ; 15: 5165-5177, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32764943

RESUMO

Background: The integration of NIR photothermal therapy and chemotherapy is considered as a promising technique for future cancer therapy. Hollow Prussian nanospheres have attracted much attention due to excellent near-infrared photothermal conversion effect and drug-loading capability within an empty cavity. However, to date, the hollow Prussian nanospheres have been prepared by a complex procedure or in organic media, and their shell thickness and size cannot be controlled. Thus, a simple and controllable route is highly desirable to synthesize hollow Prussian nanospheres with controllable parameters. Materials and Methods: Here, in our designed synthesis route, the traditional FeCl3 precursor was replaced with Fe2O3 nanospheres, and then the Prussian blue (PB) nanoparticles were engineered into hollow-structured PB (HPB) nanospheres through an interface reaction, where the Fe2O3 colloidal template provides Fe3+ ions. The reaction mechanism and control factors of HPB nanospheres were systematically investigated. Both in vitro and in vivo biological effects of the as-synthesized HPB nanospheres were evaluated in detail. Results: Through systematical experiments, a solvent-mediated interface reaction mechanism was put forward, and the parameters of HPB nanospheres could be easily adjusted by growth time and template size under optimal water and ethanol ratio. The in vitro tests show the rapid and remarkable photothermal effects of the as-prepared HPB nanospheres under NIR laser irradiation (808 nm). Meanwhile, HPB nanospheres also demonstrated a high DOX loading capacity of 440 mg g-1 as a drug carrier, and the release of the drug can be regulated by the heat from PB shell under the exposure of an NIR laser. The in vivo experiments confirmed the outstanding performance of HPB nanospheres in photothermal/chemo-synergistic therapy of cancer. Conclusion: A solvent-mediated template route was developed to synthesize hollow Prussian blue (HPB) nanospheres in a simple and controllable way. The in vitro and in vivo results demonstrate the as-synthesized HPB nanospheres as a promising candidate due to their low toxicity and high efficiency for cancer therapy.


Assuntos
Portadores de Fármacos/química , Ferrocianetos/química , Nanosferas/química , Fototerapia/métodos , Terapia Combinada , Doxorrubicina/química , Doxorrubicina/farmacologia , Doxorrubicina/uso terapêutico , Compostos Férricos/química , Humanos , Hipertermia Induzida
2.
Lancet ; 396(10247): 345-360, 2020 08 01.
Artigo em Inglês | MEDLINE | ID: mdl-32738956

RESUMO

Atopic dermatitis is a common inflammatory skin disorder characterised by recurrent eczematous lesions and intense itch. The disorder affects people of all ages and ethnicities, has a substantial psychosocial impact on patients and relatives, and is the leading cause of the global burden from skin disease. Atopic dermatitis is associated with increased risk of multiple comorbidities, including food allergy, asthma, allergic rhinitis, and mental health disorders. The pathophysiology is complex and involves a strong genetic predisposition, epidermal dysfunction, and T-cell driven inflammation. Although type-2 mechanisms are dominant, there is increasing evidence that the disorder involves multiple immune pathways. Currently, there is no cure, but increasing numbers of innovative and targeted therapies hold promise for achieving disease control, including in patients with recalcitrant disease. We summarise and discuss advances in our understanding of the disease and their implications for prevention, management, and future research.


Assuntos
Dermatite Atópica/epidemiologia , Dermatite Atópica/fisiopatologia , Inflamação/fisiopatologia , Linfócitos T/imunologia , Adolescente , Asma/epidemiologia , Criança , Pré-Escolar , Comorbidade , Dermatite Atópica/prevenção & controle , Dermatite Atópica/terapia , Eczema/patologia , Hipersensibilidade Alimentar/epidemiologia , Predisposição Genética para Doença/genética , Carga Global da Doença , Humanos , Lactente , Transtornos Mentais/epidemiologia , Microbiota/fisiologia , Terapia de Alvo Molecular/métodos , Fototerapia/métodos , Prevalência , Prurido/patologia , Qualidade de Vida , Rinite Alérgica/epidemiologia , Linfócitos T/patologia
3.
J Alzheimers Dis ; 77(1): 113-125, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32804145

RESUMO

BACKGROUND: A system of photosensitive retinal ganglion cells provides 'non-visual' information on the circadian sequences of light to the suprachiasmatic nucleus (SCN), which, as the 'master clock', synchronizes the chronobiological mechanisms of all the biological clocks. Damage to SCN structure alters circadian behavioral and hormonal rhythms and interferes with a regular sleep-wake pattern. Several studies have shown that, in aging and in Alzheimer's disease (AD), circadian rhythms change their synchronization with the environment and behavior loses sync with light. OBJECTIVE: The current overview aims to examine research studies showing the effect of bright light therapy (BLT) on sleep disorders and sleep-wake patterns in AD. METHODS: A literature search was conducted, taking into consideration the relevant studies over the last 20 years. Fifteen studies have been thorough: seven followed an environmental-architectural approach and eight followed a treatment devices approach. RESULTS: Studies agree in considering BLT as a promising non-pharmacological intervention to compensate for circadian rhythm alterations and they support the need for standardized protocols that allow a comparison between multicenter studies. CONCLUSION: Interestingly, in an attempt to contain the spread of the COVID-19 pandemic, health authorities have forced the population to stay home. Therefore, AD people are not currently able to enjoy exposure to sunlight. It is predictable that they may experience an exacerbation of circadian disturbances and that the BLT can be an effective response to prevent such exacerbation.


Assuntos
Doença de Alzheimer/terapia , Fototerapia/métodos , Transtornos do Sono-Vigília/terapia , Doença de Alzheimer/complicações , Doença de Alzheimer/fisiopatologia , Infecções por Coronavirus , Humanos , Pandemias , Pneumonia Viral , Transtornos do Sono-Vigília/etiologia , Transtornos do Sono-Vigília/fisiopatologia , Luz Solar , Núcleo Supraquiasmático
4.
Ther Deliv ; 11(8): 521-534, 2020 08.
Artigo em Inglês | MEDLINE | ID: mdl-32757745

RESUMO

Nanoscale size-dependent properties give nanomaterials unique specifications that are robust in many applications of human medicine. Gold nanoparticles (AuNPs) have recently gained attention because of their unique optical, physical and electrical properties. AuNPs increase the efficacy of biomedical applications in diagnostic treatments for infectious diseases, by targeting or labeling target cells/bioactive compounds. However, it is imperative to develop the regimens for more accurate diagnostic tools, preventive care and effective therapy. Our critical and comprehensive review presents emerging avenues of molecular diagnostics as well as therapeutics translated into clinical approaches. This manuscript critically reviews the rampant future of AuNPs in the diagnosis and treatment of the most important diseases, such as cancer and viruses of respiratory system.


Assuntos
Ouro/química , Nanopartículas Metálicas/química , Antineoplásicos/química , Antineoplásicos/uso terapêutico , Betacoronavirus/isolamento & purificação , Infecções por Coronavirus/diagnóstico , Infecções por Coronavirus/terapia , Infecções por Coronavirus/virologia , Portadores de Fármacos/química , Humanos , Pneumopatias/diagnóstico , Pneumopatias/terapia , Neoplasias/diagnóstico , Neoplasias/tratamento farmacológico , Pandemias , Fototerapia , Pneumonia Viral/diagnóstico , Pneumonia Viral/terapia , Pneumonia Viral/virologia
5.
Medicine (Baltimore) ; 99(30): e20835, 2020 Jul 24.
Artigo em Inglês | MEDLINE | ID: mdl-32791671

RESUMO

INTRODUCTION: Allergic rhinitis (AR) is an immunoglobulin E (Ig E)-mediated inflammatory disease. Intranasal phototherapy is a promising treatment modality because it has a profound immunosuppressive effect, but the available evidence of its use for AR is insufficient. Therefore, rigorously designed randomized controlled trials (RCTs) are needed. Our objective is to describe the protocol for a feasibility trial to assess the effects and safety of intranasal phototherapy for the treatment of AR. METHODS AND ANALYSIS: This is a study protocol for a single-center, randomized, double-blind, parallel, placebo-controlled, investigator-initiated pilot study. A total of 40 patients with AR will be randomly assigned to the medical device or sham device group in a 1:1 ratio. The participants will receive intranasal phototherapy with a medical or sham device for 20 min 5 times a week for 2 weeks. The primary outcome will be the mean change in the Total Nasal Symptom Score (TNSS) from baseline to 2 weeks. The secondary outcomes will include the Rhinoconjunctivitis Quality of Life Questionnaire (RQLQ) score, Nasal Endoscopy Index, total serum Ig E level, and eosinophil count. DISCUSSION: The findings of this study will provide the basis for subsequent large-scale definitive RCTs to confirm the effects and safety of intranasal phototherapy for the treatment of nasal symptoms in patients with AR who do not respond well to conventional therapy. This study may assist in the development of noninvasive treatment for patients with AR. TRIAL REGISTRATION: This study was registered at the Korean National Clinical Trial Registry, Clinical Research Information Service (KCT0003253).


Assuntos
Fototerapia , Rinite Alérgica/terapia , Método Duplo-Cego , Humanos , Projetos Piloto , Ensaios Clínicos Controlados Aleatórios como Assunto
6.
S Afr Med J ; 110(3): 249-254, 2020 Feb 26.
Artigo em Inglês | MEDLINE | ID: mdl-32657704

RESUMO

BACKGROUND: In South Africa (SA), healthy term newborns are usually discharged ˂72 hours after delivery. Discharged babies remain at risk for severe hyperbilirubinaemia if it is not identified early. Hyperbilirubinaemia is an important cause of readmission, and also leads to neonatal mortality and morbidity. Use of transcutaneous bilirubin (TcB) screening before hospital discharge has been controversial. OBJECTIVES: To test the clinical benefits of TcB screening of healthy newborns before discharge for the outcomes of readmission for jaundice and severe hyperbilirubinaemia in a randomised controlled trial (RCT). METHODS: This was a RCT. We compared predischarge TcB screening with visual assessment (alone) for jaundice in apparently healthy newborns at a public tertiary hospital in Cape Town, SA. Patients or study participants were not involved in the study design and implementation. RESULTS: Of the 1 858 infants, 63% were black, 35% of mixed race and 1% white. There was a significant reduction in the rate of readmission for jaundice (risk ratio (RR) 0.25; 95% confidence interval (CI) 0.14 - 0.46; p<0.0001) and in the incidence of severe hyperbilirubinaemia (RR 0.27; 95% CI 0.08 - 0.97; p=0.05) with the use of TcB screening compared with visual inspection. CONCLUSIONS: Predischarge TcB screening is superior in identifying newborns at risk of severe hyperbilirubinaemia compared with visual inspection. We recommend that every newborn, regardless of skin pigmentation, should receive objective bilirubin screening before hospital discharge. Universal bilirubin screening in newborns could potentially reduce hyperbilirubinaemia-related morbidity and mortality.


Assuntos
Bilirrubina/análise , Hiperbilirrubinemia/diagnóstico , Triagem Neonatal , Readmissão do Paciente/estatística & dados numéricos , Transfusão Total , Feminino , Humanos , Hiperbilirrubinemia/mortalidade , Hiperbilirrubinemia/terapia , Recém-Nascido , Tempo de Internação , Masculino , Fototerapia
7.
Life Sci ; 257: 118108, 2020 Sep 15.
Artigo em Inglês | MEDLINE | ID: mdl-32682920

RESUMO

AIM: Preparation of pegylated gold nanorods (PEG-AuNRs) that are capable of converting near infrared (NIR) light into heat. Evaluation of cancer therapeutic efficacy and long-term toxicity of the proposed photothermal therapy in comparison with other conventional modalities. MATERIALS AND METHODS: Prepared PEG-AuNRs were characterized by measuring their absorption spectra, zeta potential, and transmission electron microscope (TEM). Cancer therapeutic efficacy was assessed by monitoring tumor growth, measuring DNA damage and superoxide dismutase (SOD) and malondialdehyde (MDA) levels in addition to examining tumor histopathology. Further analysis concerning the toxicity of all the proposed treatment modalities was also assessed by evaluating the cytotoxicity and genotoxicity in liver and kidney tissues. KEY FINDINGS: The results demonstrated that both photothermal therapy (PEG-AuNRs + NIR laser) and chemotherapy (cisplatin) have higher efficacy in diminishing Ehrlich tumor growth with significance DNA damage over the other treatment modalities. Concerning the biosafety issue, mice treated photothermally exhibited lower MDA level and higher SOD activity in liver and kidney tissues compared with other treated groups. DNA damage represented by tail moment and olive moment of kidney tissues exhibited lower values for photothermal treated group and higher values for cisplatin treated group. SIGNIFICANCE: Photothermal therapy (PEG-AuNRs + NIR laser) potentiates higher efficacy in treating Ehrlich tumor with minimum toxicity in comparison with other conventional treatment modalities.


Assuntos
Carcinoma de Ehrlich/terapia , Ouro/administração & dosagem , Nanotubos/toxicidade , Fototerapia/métodos , Animais , Carcinoma de Ehrlich/patologia , Ensaio Cometa , Dano ao DNA/efeitos dos fármacos , Feminino , Ouro/uso terapêutico , Ouro/toxicidade , Malondialdeído/metabolismo , Camundongos , Camundongos Endogâmicos BALB C , Microscopia Eletrônica de Transmissão , Nanotubos/ultraestrutura , Transplante de Neoplasias , Estresse Oxidativo , Superóxido Dismutase/metabolismo
8.
Cochrane Database Syst Rev ; 7: CD012011, 2020 07 01.
Artigo em Inglês | MEDLINE | ID: mdl-32609375

RESUMO

BACKGROUND: Phototherapy is a well-established effective therapy for treating babies with significant neonatal jaundice. Studies have shown that increasing light intensity will increase its efficiency. A potentially inexpensive and easy way of increasing the intensity of light on the body of the infant may be to hang reflective materials from the sides of phototherapy units. OBJECTIVES: To assess the effects of reflective materials in combination with phototherapy compared with phototherapy alone for unconjugated hyperbilirubinaemia in neonates. SEARCH METHODS: We used the standard search strategy of Cochrane Neonatal to search the Cochrane Central Register of Controlled Trials (CENTRAL; 2019, Issue 11), in the Cochrane Library; Ovid MEDLINE(R) and Epub Ahead of Print, In-Process & Other Non-Indexed Citations, Daily and Versions(R); and the Cumulative Index of Nursing and Allied Health Literature (CINAHL), on 1 November 2019. We also searched clinical trials databases and the reference lists of retrieved articles for randomised controlled trials and quasi-randomised trials. SELECTION CRITERIA: We included randomised and quasi-randomised controlled trials if the participants, who were term or preterm infants, received phototherapy with curtains made of reflective materials of any type in the treatment arm, and if those in the comparison arm received similar phototherapy without curtains or other intensified phototherapy, such as a double bank of lights. DATA COLLECTION AND ANALYSIS: We used standard methodological procedures expected by Cochrane. We used the GRADE approach to assess the certainty of evidence. MAIN RESULTS: Of 15 studies identified, we included 12 (1288 babies) in the review - 11 comparing phototherapy with reflective materials and phototherapy alone, and one comparing a single phototherapy light bank with reflective materials with double phototherapy. All reflective materials consisted of curtains on three or four sides of the cot and were made of white plastic (five studies), white linen (two studies), or aluminium (three studies); materials were not specified in two studies. Only 11 studies (10 comparing reflective materials versus none and one comparing reflective curtains and a single bank of lights with a double (above and below) phototherapy unit) provided sufficient data to be included in the meta-analysis. Two excluded studies used the reflective materials in a way that did not meet our inclusion criteria, and we excluded one study because it compared four different phototherapy interventions not including reflective materials. The risk of bias of included studies was generally low, but all studies had high risk of performance bias due to lack of blinding of the intervention. Three studies (281 participants) reported a decline in serum bilirubin (SB) (µmol/L) at four to eight hours (mean difference (MD) -14.61, 95% confidence interval (CI) -19.80 to -9.42; I² = 57%; moderate-certainty evidence). Nine studies (893 participants) reported a decline in SB over 24 hours and showed a faster decline in SB in the intervention group, but heterogeneity (I² = 97%) was too substantial to permit a meaningful estimate of the actual effect size (very low-certainty evidence). Subgroup analysis by type of reflective material used did not explain the heterogeneity. Exchange transfusion was reported by two studies; both reported none in either group. Four studies (466 participants) reported the mean duration of phototherapy, and in each of these studies, it was reduced in the intervention group but there was substantial heterogeneity (I² = 88%), precluding meaningful meta-analysis of data. The only two studies that reported the mean duration of hospital stay in hours showed a meaningful reduction (MD -41.08, 95% CI -45.92 to -36.25; I² = 0; moderate-certainty evidence). No studies reported costs of the intervention, parental or medical staff satisfaction, breastfeeding outcomes, or neurodevelopmental follow-up. The only study that compared use of curtains with double phototherapy reported similar results for both groups. Studies that monitored adverse events did not report increased adverse events related to the use of curtains, including acute life-threatening events, but other rarer side effects could not be excluded. AUTHORS' CONCLUSIONS: Moderate-certainty evidence shows that the use of reflective curtains during phototherapy may result in greater decline in SB. Very low-certainty evidence suggests that the duration of phototherapy is reduced, and moderate-certainty evidence shows that the duration of hospital stay is also reduced. Available evidence does not show any increase in adverse events, but further studies are needed.


Assuntos
Alumínio , Roupas de Cama, Mesa e Banho , Hiperbilirrubinemia Neonatal/terapia , Fototerapia/métodos , Plásticos , Viés , Bilirrubina/sangue , Humanos , Recém-Nascido , Recém-Nascido Prematuro , Icterícia Neonatal/terapia , Iluminação/instrumentação , Fototerapia/instrumentação , Ensaios Clínicos Controlados Aleatórios como Assunto
9.
Ann Biol Clin (Paris) ; 78(4): 383-397, 2020 Aug 01.
Artigo em Inglês | MEDLINE | ID: mdl-32666924

RESUMO

The SFBC-CNBH-CNRHP "Neonatal bilirubin" working group performed a biological and clinical study on bilirubin use in neonates for reliable diagnosis and appropriate management of neonatal jaundice. A brief report of a national survey on analytical and biological practices in France is shown. The guidelines of the French Society of Neonatology (SFN) founded the decision of phototherapy set up upon an accurate lab measurement of total serum bilirubin. An abacus is proposed with defined thresholds, as a function of neonate lifetime in hours. However, several studies evidenced poor comparability of results obtained with the different available methods. This situation is partly due to the lack of reference materials, especially for high bilirubin concentrations. Clinical consequences might be observed. We present in this paper the results of a national harmonization study to progress on this issue. Beyond the analytical aspects, the clinical consequences of harmonization defects were investigated. Finally, guidelines for clinical laboratories are proposed, to be locally adapted.


Assuntos
Testes Hematológicos/normas , Hiperbilirrubinemia Neonatal/diagnóstico , Icterícia Neonatal/diagnóstico , Triagem Neonatal/normas , Guias de Prática Clínica como Assunto , Bilirrubina/sangue , França , Testes Hematológicos/métodos , Humanos , Hiperbilirrubinemia Neonatal/sangue , Hiperbilirrubinemia Neonatal/terapia , Recém-Nascido , Icterícia Neonatal/sangue , Icterícia Neonatal/terapia , Laboratórios/normas , Ensaio de Proficiência Laboratorial/normas , Triagem Neonatal/métodos , Fototerapia/métodos , Fototerapia/normas , Padrões de Referência
10.
PLoS One ; 15(7): e0235500, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32614886

RESUMO

INTRODUCTION: Clinical trials often suffer from significant recruitment barriers, poor adherence, and dropouts, which increase costs and negatively affect trial outcomes. The aim of this study was to examine whether making it virtual and reward-based would enable nationwide recruitment, identify patients with variable disease severity, achieve high adherence, and reduce dropouts. METHODS: In a siteless, virtual feasibility study, individuals with atopic dermatitis (AD) were recruited online. During the 8-week study, subjects used their smartphones weekly to photograph target AD lesions, and completed patient-oriented eczema measure (POEM) and treatment use questionnaires. In return, subjects were rewarded every week with personalized lifestyle reports based on their DNA. RESULTS: Over the course of the 11 day recruitment period, 164 (82% women and 18% men) filled in the form to participate, of which 65 fulfilled the inclusion criteria and signed the informed consent. Ten were excluded as they did not complete the mandatory study task of returning the DNA sample. 55 (91% women, 9% men) subjects returned the DNA sample and were enrolled throughout Denmark, the majority outside the Copenhagen capital region in rural areas with relatively low physician coverage. The mean age was 28.5 (SD ±9.5 years, range 18-52 years). The baseline POEM score was 14.5±5.6 (range 6-28). Based on the POEM, 7 individuals had mild, 28 had moderate, 17 had severe, and 3 had very severe eczema. The retention rate was 96% as 53 out of 55 enrolled completed the study. The adherence was very high, and more than 90% of all study tasks were completed. Follow up of 41 subjects showed that 90% would take part again or continue if the study had been longer. CONCLUSION: A virtual trial design enables recruitment with broad geographic reach and throughout the full spectrum of disease severity. Providing personalized genetic reports as a reward seems to contribute to high adherence and retention.


Assuntos
Dermatite Atópica/psicologia , Eczema/patologia , Recompensa , Cooperação e Adesão ao Tratamento , Adolescente , Adulto , DNA/análise , Dermatite Atópica/genética , Dermatite Atópica/patologia , Dermatite Atópica/terapia , Fármacos Dermatológicos/uso terapêutico , Feminino , Estudo de Associação Genômica Ampla , Humanos , Masculino , Pessoa de Meia-Idade , Fototerapia , Índice de Gravidade de Doença , Smartphone , Inquéritos e Questionários , Adulto Jovem
11.
Mymensingh Med J ; 29(2): 405-413, 2020 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-32506097

RESUMO

Hearing impairment is one of the deleterious ramifications of neonatal hyperbilirubinemia, but its impact during the newborn period has not been well studied in Bangladesh. This prospective observational study was conducted during January 2016 to December 2017 in the Department of Neonatology and Otolaryngology-Head and Neck Surgery, Bangabandhu Sheikh Mujib Medical University (BSMMU), Dhaka, Bangladesh to identify the relationship between hyperbilirubinemia requiring phototherapy or exchange transfusion with hearing impairment in term and late preterm neonates. Admitted term and late preterm neonates with hyperbilirubinemia requiring either phototherapy or exchange transfusion were taken as hyperbilirubinemia group. Neonates without hyperbilirubinemia from postnatal ward were taken as control. All newborn were screened with Distortion Product Otoacoustic Emissions (DPOAE) prior to discharge from hospital. A second screen was done in referred newborn after one month of first screen. A diagnostic Auditory Brainstem Response (ABR) was performed in both the ears prior to 3 months of postnatal age if referred in both 1st and 2nd screen. Total 264 neonates included in this study; 132 in the hyperbilirubinemia and 132 in the control group. In the hyperbilirubinemia group 74(56.06%) were male and 58(43.94) were female. Mean gestational ages in the hyperbilirubinemia group and control group were 36.95±1.60 weeks and 37.01±1.67 weeks respectively. Newborn in the hyperbilirubinemia group, 4(3.03%) had hearing impairment and none had hearing impairment in the control group. Peak Total Serum Bilirubin (TSB) 23mg/dl was found as best cut off value with a sensitivity of 100% and specificity of 93% for the development hearing impairment. Hearing impairment was significantly more frequent among newborn with TSB level >23mg/dl when compared to those having TSB level ≤23mg/dl (20% vs. 0.9%, p=0.009; OR=29, 95% CI 2.79, 301). Hearing impairment was associated with newborns with hyperbilirubinemia requiring phototherapy or exchange transfusion. Peak TSB level >23mg/dl can be predictive for the development of hearing impairment.


Assuntos
Perda Auditiva , Hiperbilirrubinemia Neonatal , Bangladesh , Bilirrubina , Feminino , Humanos , Lactente , Recém-Nascido , Unidades de Terapia Intensiva Neonatal , Masculino , Fototerapia
12.
PLoS One ; 15(6): e0234643, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32555717

RESUMO

BACKGROUND: Photoimmunotherapy (PIT) employs the use of a near-infrared (NIR) laser to activate an antibody conjugated to a NIR-activatable dye to induce cancer cell death. PIT has shown to be effective in a number of studies, however, there are no data on its use in colorectal cancer in an orthotopic model. METHODS: Humanized anti-CEA antibody (M5A) was conjugated to NIR-activatable IRDye700DX (M5A-700). PIT was validated in vitro with a colon cancer cell-line, using a laser intensity of either 4 J/cm2, 8 J/cm2, or 16 J/cm2. Orthotopic colon cancer mouse models were established by surgical implantation of LS174T tumor fragments onto the cecum. M5A-700 was administered and PIT was performed 24 hours later using a 690 nm laser. Repeat PIT was performed after 7 days in one group. Control mice received laser treatment only. RESULTS: In vitro PIT demonstrated tumor cell death in a laser intensity dose-dependent fashion. In orthotopic models, control mice demonstrated persistent tumor growth. Mice that underwent PIT one time had tumor growth arrested for one week, after which re-growth occurred. The group that received repeated PIT exposure had persistent inhibition of tumor growth. CONCLUSION: PIT arrests tumor growth in colon cancer orthotopic nude-mouse models. Repeated PIT arrests colon cancer growth for a longer period of time. PIT may be a useful therapy in the future as an adjunct to surgical resection or as primary therapy to suppress tumor progression.


Assuntos
Neoplasias Colorretais/terapia , Imunoconjugados/farmacologia , Imunoterapia/métodos , Indóis/uso terapêutico , Compostos de Organossilício/uso terapêutico , Fototerapia/métodos , Receptores de Superfície Celular/imunologia , Animais , Carcinogênese/efeitos dos fármacos , Linhagem Celular Tumoral , Humanos , Camundongos , Camundongos Nus , Fármacos Fotossensibilizantes/uso terapêutico , Resultado do Tratamento , Ensaios Antitumorais Modelo de Xenoenxerto
13.
J Vis Exp ; (159)2020 05 22.
Artigo em Inglês | MEDLINE | ID: mdl-32510507

RESUMO

The precision delivery of anti-cancer agents which aim for targeted and deep-penetrated delivery as well as a controlled release at the tumor site has been challenged. Here, we fabricate iron oxide nanoparticle shelled microbubbles (NSMs) through self-assembly, synergizing magnetic, acoustic, and optical responsiveness in one nanotherapeutic platform. Iron oxide nanoparticles serve as both magnetic and photothermal agents. Once intravenously injected, NSMs can be magnetically guided to the tumor site. Ultrasound triggers the release of iron oxide nanoparticles, facilitating the penetration of nanoparticles deep into the tumor due to the cavitation effect of microbubbles. Thereafter, magnetic hyperthermia and photothermal therapy can be performed on the tumor for combinational cancer therapy, a solution for cancer resistance due to the tumor heterogeneity. In this protocol, the synthesis and characterization of NSMs including structural, chemical, magnetic and acoustic properties were performed. In addition, the anti-cancer efficacy by thermal therapy was investigated using in vitro cell cultures. The proposed delivery strategy and combination therapy holds great promise in cancer treatment to improve both delivery and anticancer efficacies.


Assuntos
Acústica , Hipertermia Induzida , Fenômenos Magnéticos , Microbolhas/uso terapêutico , Neoplasias/terapia , Fenômenos Ópticos , Fototerapia/métodos , Terapia Combinada , Sistemas de Liberação de Medicamentos , Humanos , Temperatura
14.
Nat Commun ; 11(1): 2778, 2020 06 08.
Artigo em Inglês | MEDLINE | ID: mdl-32513979

RESUMO

The use of photothermal agents (PTAs) in cancer photothermal therapy (PTT) has shown promising results in clinical studies. The rapid degradation of PTAs may address safety concerns but usually limits the photothermal stability required for efficacious treatment. Conversely, PTAs with high photothermal stability usually degrade slowly. The solutions that address the balance between the high photothermal stability and rapid degradation of PTAs are rare. Here, we report that the inherent Cu2+-capturing ability of black phosphorus (BP) can accelerate the degradation of BP, while also enhancing photothermal stability. The incorporation of Cu2+ into BP@Cu nanostructures further enables chemodynamic therapy (CDT)-enhanced PTT. Moreover, by employing 64Cu2+, positron emission tomography (PET) imaging can be achieved for in vivo real-time and quantitative tracking. Therefore, our study not only introduces an "ideal" PTA that bypasses the limitations of PTAs, but also provides the proof-of-concept application of BP-based materials in PET-guided, CDT-enhanced combination cancer therapy.


Assuntos
Cobre/química , Hipertermia Induzida , Neoplasias/terapia , Fósforo/química , Fototerapia , Tomografia por Emissão de Pósitrons , Animais , Morte Celular , Linhagem Celular Tumoral , Terapia Combinada , Cobre/farmacocinética , Humanos , Íons , Camundongos , Nanoestruturas/química , Nanoestruturas/ultraestrutura , Oligopeptídeos/química , Fósforo/farmacocinética , Polietilenoglicóis/química , Espectrofotometria Ultravioleta , Nanomedicina Teranóstica
15.
J Photochem Photobiol B ; 207: 111891, 2020 Jun.
Artigo em Inglês | MEDLINE | ID: covidwho-154800

RESUMO

The recent outbreak of COVID-19, which continues to ravage communities with high death tolls and untold psychosocial and catastrophic economic consequences, is a vivid reminder of nature's capacity to defy contemporary healthcare. The pandemic calls for rapid mobilization of every potential clinical tool, including phototherapy-one of the most effective treatments used to reduce the impact of the 1918 "Spanish influenza" pandemic. This paper cites several studies showing that phototherapy has immense potential to reduce the impact of coronavirus diseases, and offers suggested ways that the healthcare industry can integrate modern light technologies in the fight against COVID-19 and other infections. The evidence shows that violet/blue (400-470 nm) light is antimicrobial against numerous bacteria, and that it accounts for Niels Ryberg Finsen's Nobel-winning treatment of tuberculosis. Further evidence shows that blue light inactivates several viruses, including the common flu coronavirus, and that in experimental animals, red and near infrared light reduce respiratory disorders, similar to those complications associated with coronavirus infection. Moreover, in patients, red light has been shown to alleviate chronic obstructive lung disease and bronchial asthma. These findings call for urgent efforts to further explore the clinical value of light, and not wait for another pandemic to serve as a reminder. The ubiquity of inexpensive light emitting lasers and light emitting diodes (LEDs), makes it relatively easy to develop safe low-cost light-based devices with the potential to reduce infections, sanitize equipment, hospital facilities, emergency care vehicles, homes, and the general environment as pilot studies have shown.


Assuntos
Infecções por Coronavirus/terapia , Fototerapia , Infecções por Coronavirus/epidemiologia , Infecções por Coronavirus/virologia , Helioterapia , Humanos , Raios Infravermelhos , Luz , Terapia com Luz de Baixa Intensidade , Pneumopatias/epidemiologia , Pneumopatias/terapia , Pneumopatias/virologia , Pandemias , Fototerapia/métodos , Pneumonia Viral
16.
Nanotoxicology ; 14(6): 774-787, 2020 08.
Artigo em Inglês | MEDLINE | ID: mdl-32401088

RESUMO

Gastric carcinoma is one of the most lethal malignant tumors. As part of our long-term efforts on seeking effective diagnosis and therapeutic strategies of gastric cancer, we present herein novel ternary copper-based chalcogenide nanoplatform CuS-NiS2 nanomaterials with outstanding photothermal (PT)/photodynamic (PD) property that could effectively suppress human gastric cancer in vitro and in vivo without obvious side effects. We revealed that CuS-NiS2 induced reactive oxygen species (ROS) generation, leading to apoptosis through Bcl-2/Bax pathway of human gastric cancer cells under 808 nm near-infrared (NIR) irradiation. In addition, we also confirmed that the combination of CuS-NiS2 and 808 nm NIR laser treatment triggered necroptosis by regulating the novel pathway MLKL/CAPG of human gastric cancer cells. Moreover, the CuS-NiS2 exhibited excellent contrast enhancement according to magnetic resonance imaging (MRI). Taken together, we reported new ternary copper-based chalcogenide nanomaterials CuS-NiS2, which could be successfully applied for MRI-guided PT/PD therapy of gastric carcinoma through mitochondria-mediated apoptosis and MLKL/CAPG-mediated necroptosis.


Assuntos
Apoptose/efeitos dos fármacos , Cobre/uso terapêutico , Proteínas dos Microfilamentos/metabolismo , Mitocôndrias/efeitos dos fármacos , Nanoestruturas/uso terapêutico , Necroptose/efeitos dos fármacos , Níquel/uso terapêutico , Proteínas Nucleares/metabolismo , Fototerapia/métodos , Proteínas Quinases/metabolismo , Neoplasias Gástricas/terapia , Animais , Linhagem Celular Tumoral , Cobre/administração & dosagem , Humanos , Imagem por Ressonância Magnética , Masculino , Camundongos Nus , Mitocôndrias/metabolismo , Nanoestruturas/administração & dosagem , Níquel/administração & dosagem , Neoplasias Gástricas/diagnóstico por imagem , Neoplasias Gástricas/metabolismo , Neoplasias Gástricas/patologia , Ensaios Antitumorais Modelo de Xenoenxerto
17.
J Dtsch Dermatol Ges ; 18(7): 669-673, 2020 07.
Artigo em Inglês | MEDLINE | ID: mdl-32364667

RESUMO

Scleroderma is a heterogeneous group of fibrosing connective tissue disorders of unknown etiology. Morphea is a localized form of scleroderma that occasionally leads to chronic erosions and ulcerations of the skin. Fibrosis, inflammation and chronic ulcerations may eventually promote skin neoplasms; morphea is therefore a rare but established risk factor for cutaneous squamous cell carcinoma (cSCC). We present a review of 16 scleroderma patients: 15 case reports from the literature (identified by a PubMed search) and one case from our clinic of a patient who had developed cSCC, and we discuss potential underlying mechanisms. Statistical analysis revealed that the lower extremities were the body site most commonly affected by cSCC in these scleroderma patients. The mean time interval between the onset of scleroderma and the development of cSCC was ten to twenty years. In patients with morphea, we recommend checking for skin tumors during follow-up examinations as well as a careful risk-benefit analysis when considering the application of immunosuppressants or phototherapy in view of their potential carcinogenic side effects.


Assuntos
Carcinoma de Células Escamosas/etiologia , Esclerodermia Localizada/complicações , Neoplasias Cutâneas/etiologia , Adolescente , Adulto , Idade de Início , Idoso , Carcinoma de Células Escamosas/patologia , Feminino , Humanos , Imunossupressores/efeitos adversos , Imunossupressores/uso terapêutico , Masculino , Pessoa de Meia-Idade , Fototerapia/efeitos adversos , Fatores de Risco , Esclerodermia Localizada/patologia , Esclerodermia Localizada/terapia , Neoplasias Cutâneas/patologia , Adulto Jovem
18.
Clin Pediatr (Phila) ; 59(6): 588-595, 2020 06.
Artigo em Inglês | MEDLINE | ID: mdl-32423343

RESUMO

Objective. Phototherapy devices have been found to be an effective method for treating neonatal hyperbilirubinemia. We reviewed the current literature to determine whether home-based phototherapy is more effective than hospital-based phototherapy for the treatment of neonatal hyperbilirubinemia. Method. PubMed, Scopus, Embase, Cochrane library, CBM, CNKI, and Wanfang Data were searched to collect the comparative study of home-based phototherapy versus hospital-based phototherapy for the treatment of neonatal hyperbilirubinemia. All studies were found to be of low risk based on Cochrane Collaborative Risk of Bias Tool. Data were statistically extracted and evaluated by RevMan 5.3 software. Result. A total of 259 neonates were included in the meta-analysis. Compared with hospital-based phototherapy, home-based phototherapy appeared more effective for the treatment of neonatal hyperbilirubinemia in reducing the rate of total serum bilirubin (standard mean difference = 0.32, 95% confidence interval = -0.22 to 0.86, P = .04); however, there was no significant difference in duration of phototherapy (standard mean difference = 0.59, 95% confidence interval = 0.28 to 0.90, P = .06) in the 2 groups. Conclusion. Home-based phototherapy was more effective than hospital-based phototherapy in treatment for neonatal hyperbilirubinemia; home-based phototherapy is an effective, feasible, safe, and alternative to hospital-based phototherapy for neonatal hyperbilirubinemia.


Assuntos
Assistência Domiciliar/métodos , Hiperbilirrubinemia Neonatal/terapia , Fototerapia/métodos , Bilirrubina/sangue , Hospitais , Humanos , Hiperbilirrubinemia Neonatal/sangue , Recém-Nascido , Resultado do Tratamento
19.
Int J Nanomedicine ; 15: 3235-3250, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32440121

RESUMO

Background: Metal-organic frameworks (MOFs) have attracted intensive research interest in the biomedical field because of their unique properties. However, in order to realize the high loading capacity and therapeutic efficacy, it is still urgent to develop a multifunctional MOFs-based nanoplatform. Materials and Methods: Herein, a pH/near-infrared (NIR) dual-responsive drug delivery system based on zeolitic imidazolate framework-8 (ZIF-8) is constructed for synergistic chemo-photothermal therapy and dual-modal magnetic resonance (MR)/photoacoustic (PA) imaging. The doxorubicin hydrochloride (DOX) is embedded into ZIF-8 through one-pot method, and the resultant ZIF-8/DOX is then successively modified with polydopamine, Mn ions and poly(ethylene glycol). The obtained ZIF-8/DMPP is systematically characterized, and both its in vitro and in vivo biological effects are evaluated in detail. Results: The ZIF-8/DMPP possesses a high drug-loading content of 18.9% and displays appropriate size and morphology. The pH-dependent degradation and drug release behavior of prepared ZIF-8/DMPP are confirmed. Importantly, the results demonstrate that the photothermal effect of ZIF-8/DMPP under NIR laser irradiation can significantly accelerate its drug releasing rate, further improving the intracellular drug concentrations. Thereafter, the augmented chemotherapeutic efficiency by photothermal effect against cancer cells is verified both in vitro and in vivo. Besides, the favorable MR and PA imaging capacity of ZIF-8/DMPP is also evidenced on the tumor model. Conclusion: Taken together, the surface engineering of ZIF-8-based nanocarrier in this work offers a promising strategy for the multifunctional MOFs-based drug delivery system.


Assuntos
Portadores de Fármacos/química , Hipertermia Induzida , Imageamento Tridimensional , Raios Infravermelhos , Estruturas Metalorgânicas/química , Nanopartículas/química , Nanotecnologia/métodos , Fototerapia , Animais , Linhagem Celular Tumoral , Sobrevivência Celular/efeitos dos fármacos , Doxorrubicina/farmacologia , Sistemas de Liberação de Medicamentos , Liberação Controlada de Fármacos , Células Endoteliais da Veia Umbilical Humana/efeitos dos fármacos , Humanos , Concentração de Íons de Hidrogênio , Indóis/química , Camundongos Endogâmicos BALB C , Nanopartículas/ultraestrutura , Polímeros/química , Temperatura
20.
J Appl Oral Sci ; 28: e20190720, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32428059

RESUMO

Objective This study evaluated the clinical effect of violet LED light on in-office bleaching used alone or combined with 37% carbamide peroxide (CP) or 35% hydrogen peroxide (HP). Methodology A total of 100 patients were divided into five groups (n=20): LED, LED/CP, CP, LED/HP and HP. Colorimetric evaluation was performed using a spectrophotometer (ΔE, ΔL, Δa, Δb) and a visual shade guide (ΔSGU). Calcium (Ca)/phosphorous (P) ratio was quantified in the enamel microbiopsies. Measurements were performed at baseline (T 0 ), after bleaching (T B ) and in the 14-day follow-up (T 14 ). At each bleaching session, a visual scale determined the absolute risk (AR) and intensity of tooth sensitivity (TS). Data were evaluated by one-way (ΔE, Δa, ΔL, Δb), two-way repeated measures ANOVA (Ca/P ratio), and Tukey post-hoc tests. ΔSGU and TS were evaluated by Kruskal-Wallis and Mann-Whitney, and AR by Chi-Squared tests (a=5%). Results LED produced the lowest ΔE (p<0.05), but LED/HP promoted greater ΔE, ΔSGU and Δb (T 14 ) than HP (p<0.05). No differences were observed in ΔE and ΔSGU for LED/CP and HP groups (p>0.05). ΔL and Δa were not influenced by LED activation. After bleaching, LED/CP exhibited greater Δb than CP (p>0.05), but no differences were found between these groups at T 14 (p>0.05). LED treatment promoted the lowest risk of TS (16%), while HP promoted the highest (94.4%) (p<0.05). No statistical differences of risk of TS were found for CP (44%), LED/CP (61%) and LED/HP (88%) groups (p>0.05). No differences were found in enamel Ca/P ratio among treatments, regardless of evaluation times. Conclusions Violet LED alone produced the lowest bleaching effect, but enhanced HP bleaching results. Patients treated with LED/CP reached the same efficacy of HP, with reduced risk and intensity of tooth sensitivity and none of the bleaching protocols adversely affected enamel mineral content.


Assuntos
Peróxido de Carbamida/administração & dosagem , Peróxido de Hidrogênio/administração & dosagem , Luz , Fototerapia/métodos , Clareadores Dentários/administração & dosagem , Clareamento Dental/métodos , Adolescente , Adulto , Análise de Variância , Colorimetria , Terapia Combinada , Esmalte Dentário/efeitos dos fármacos , Esmalte Dentário/efeitos da radiação , Sensibilidade da Dentina/induzido quimicamente , Feminino , Humanos , Masculino , Valores de Referência , Fatores de Risco , Espectrofotometria , Estatísticas não Paramétricas , Propriedades de Superfície/efeitos dos fármacos , Propriedades de Superfície/efeitos da radiação , Resultado do Tratamento , Adulto Jovem
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