ABSTRACT
No Brasil, 1 milhão de acidentes com queimaduras acontecem por ano e as infecções são responsáveis por 75% dos óbitos nestes pacientes, além de deixar lesões que ocasionam deformidades nas áreas atingidas. Sendo assim, o objetivo deste trabalho é fornecer uma visão atual sobre células-tronco mesenquimais (MSCs), com ênfase nas células-tronco derivadas do tecido adiposo (ADSCs), associadas a gel de plasma, gel de fibrina e membranas (scaffold). O uso de géis e membranas tendem a auxiliar o crescimento celular visando sua possível aplicação na Cirurgia Plástica Reparadora para o tratamento pacientes queimados ou que necessitam de enxerto de pele. O presente trabalho abordou de forma exploratória e narrativa o tema células-tronco mesenquimais, células-tronco mesenquimais derivadas do tecido adiposo, gel de fibrina, gel de plasma e scaffold. O tipo de pesquisa empregada foi conduzido com coleta de informações utilizando-se a Biblioteca Virtual em Saúde (BVS) e PubMed. O número absoluto de artigos publicados relacionados ao tratamento de queimaduras é considerável. Até o momento, a quantidade de pesquisas relacionadas à terapia com células-tronco derivadas do tecido adiposo, gel de fibrina, gel de plasma e scaffold para o tratamento de queimaduras apresenta-se escassa. O autoenxerto de ADSCs associado a biocurativos torna-se uma perspectiva promissora na Cirurgia Plástica Reparadora para o tratamento e recuperação de pacientes que sofreram queimaduras ou outros acidentes que necessitam de enxerto de pele. Estes recursos podem reduzir a dor e prover a dessecação da lesão, promovendo neovascularização e a reepitelização da ferida.
In Brazil, 1 million burn accidents occur annually, and subsequent wound infections account for 75% cases of deaths among these patients, in addition to inducing deformities in the affected areas. Therefore, the aim of this study was to discuss the current status of mesenchymal stem cells, with an emphasis on adipose-derived stem cells (ADSCs), in combination with plasma gel, glue fibrin, and membranes (scaffold). The use of gels and membranes supports cell growth, and aims at potential application in reconstructive plastic surgery for the treatment of burn patients or individuals requiring skin grafts. This study explores and discusses the role of mesenchymal stem cells, adipose-derived mesenchymal stem cells, glue fibrin, plasma gel, and the scaffold. This research collected information from the Virtual Health Library (VHL) and PubMed. A considerable number of articles have been published on burn treatment. However, there is little research on burn treatment with ADSCs, glue fibrin, plasma gel, and scaffold. An ADSC autograft combined with a biological dressing is promising in reconstructive plastic surgery for the treatment and recovery of burn patients or individuals with other injuries that require skin grafts. These features can reduce pain and aid in drying of the lesion, thus promoting neovascularization and wound reepithelialization.
Subject(s)
Humans , History, 21st Century , Skin , Transplantation, Autologous , Bioprosthesis , Burns , Cell Membrane , Review , Plastic Surgery Procedures , Mesenchymal Stem Cells , Gels , Skin/injuries , Transplantation, Autologous/methods , Bioprosthesis/adverse effects , Bioprosthesis/standards , Burns/surgery , Burns/complications , Cell Membrane/pathology , Cell Membrane/transplantation , Adipose Tissue , Adipose Tissue/surgery , Adipose Tissue/injuries , Plastic Surgery Procedures/methods , Mesenchymal Stem Cells/pathology , Gels/adverse effects , Gels/therapeutic use , Neovascularization, Pathologic , Neovascularization, Pathologic/surgery , Neovascularization, Pathologic/pathology , Neovascularization, Pathologic/therapyABSTRACT
OBJECTIVE: Fibromyalgia is characterized by diffuse musculoskeletal pain and discomfort. There are several reports regarding autonomic nervous system dysfunction in patients with fibromyalgia. Heart rate turbulence is expressed as ventriculophasic sinus arrhythmia and has been considered to reflect cardiac autonomic activity. Heart rate turbulence has been shown to be an independent and powerful predictor of sudden cardiac death in various cardiac abnormalities. The aim of this study is to determine whether heart rate turbulence is changed in female patients with fibromyalgia compared with healthy controls. METHODS: Thirty-seven female patients (mean age, 40±11 years) with fibromyalgia, and 35 age- and sex-matched healthy female control subjects (mean age, 42±9 years) were included. Twenty-four hours of ambulatory electrocardiography recordings were collected for all subjects, and turbulence onset and turbulence slope values were automatically calculated. RESULTS: The baseline clinical characteristics of the two groups were similar. There were no significant differences in turbulence onset and turbulence slope measures between patients and control subjects (turbulence onset: −1.648±1.568% vs. −1.582±1.436%, p ϝ 0.853; turbulence slope: 12.933±5.693 ms/RR vs. 13.639±2.505 ms/RR, p ϝ 0.508). Although body mass index was negatively correlated with turbulence slope (r ϝ −0.258, p ϝ 0.046), no significant correlation was found between body mass index and turbulence onset (r ϝ 0.228, p ϝ 0.054). CONCLUSION: To the best of our knowledge, this is the first study to evaluate heart rate turbulence in patients with fibromyalgia. It appears that heart rate turbulence parameters reflecting cardiac autonomic activity are not changed in female patients with fibromyalgia. .
Subject(s)
Humans , Male , Middle Aged , Embolization, Therapeutic , Head and Neck Neoplasms/blood supply , Head and Neck Neoplasms/diagnosis , Hemangiopericytoma/blood supply , Hemangiopericytoma/diagnosis , Image Enhancement , Magnetic Resonance Angiography , Magnetic Resonance Imaging , Neovascularization, Pathologic/diagnosis , Preoperative Care , Blood Vessels/pathology , Diagnosis, Differential , Head and Neck Neoplasms/pathology , Head and Neck Neoplasms/surgery , Hemangiopericytoma/pathology , Hemangiopericytoma/surgery , Neovascularization, Pathologic/pathology , Neovascularization, Pathologic/surgeryABSTRACT
OBJECTIVE: To evaluate whether suppression of tumor microvasculature by double anti-angiogenic protein (DAAP) treatment could increase the extent of radiofrequency ablation (RFA)-induced coagulation in a murine renal cell carcinoma model. MATERIALS AND METHODS: Renal cell carcinoma cell lines were implanted subcutaneously into 10 nude mice. Four mice received adenoviral DAAP treatment and 6 mice received sterile 0.9% saline solution as DAAP-untreated group. The effect of DAAP was evaluated according to the vascularity by contrast-enhanced ultrasound (CEUS) using microbubbles. Four DAAP-treated mice and 4 DAAP-untreated mice were then treated with RFA, resulting in 3 groups: no-therapy (n = 2), RFA only (n = 4), and RFA combined with DAAP treatment (n = 4). Immediately after RFA, the size of coagulation necrosis and mitochondrial enzyme activity were compared between the groups using analysis of variance (ANOVA) and post hoc test. RESULTS: The contrast enhancement ratio for tumor vascularization on CEUS was significantly lower in the DAAP treated group than in DAAP-untreated group (30.2 +/- 9.9% vs. 77.4 +/- 17.3%; p = 0.021). After RFA, the mean coagulation diameter was 0 mm for no-therapy group, 6.7 +/- 0.7 mm for the RFA only group and 8.5 +/- 0.4 mm for the RFA with DAAP group (ANOVA, p < 0.001). The area of viable mitochondria within the tumor was 27.9 +/- 3.9% in no-therapy group, 10.3 +/- 4.5% in the RFA only group, and 2.1 +/- 0.7% in the RFA with DAAP group (ANOVA, p < 0.001). CONCLUSION: Our results suggest the potential value of combining RFA with anti-angiogenic therapy.
Subject(s)
Animals , Male , Mice , Adenoviridae , Angiogenic Proteins/antagonists & inhibitors , Carcinoma, Renal Cell/blood supply , Catheter Ablation/methods , Combined Modality Therapy , Contrast Media , Kidney Neoplasms/blood supply , Mice, Nude , Microbubbles , Neovascularization, Pathologic/surgery , Recombinant ProteinsABSTRACT
We describe the case of a 23-month-old female infant with a diagnosis of hemolytic uremic syndrome (HUS) and hemorrhagic retinopathy. The patient had a past history of abdominal pain, bloody diarrhea, and acute renal failure. On ophthalmologic examination, indirect ophthalmoscopy revealed extensive areas of flame-shaped hemorrhage, cotton wool spots, macular edema and optic nerve head neovascularization in both eyes. Fluorescein angiography showed severe bilateral retinal ischemia and neovascularization leakage in disk. The patient, who had the visual acuity of 20/1000 in the right eye (OD) and 20/540 in the left eye (OS) at the first examination, was treated with panretinal photocoagulation (PRP) and presented at the end of the 6th month of follow-up improvement to 20/540 in OD and 20/270 in OS. There was also a regression of disc neovascularization, hemorrhages and macular edema. Despite intense retinal ischemia, there were no complications related to angiogenesis such as vitreous hemorrhage and/or neovascular glaucoma. We describe, in this report, the association between hemorrhagic retinopathy with features of Purtscher-like disease and HUS.
Descrevemos o caso de um lactente do sexo feminino de 23 meses com diagnóstico de síndrome hemolítico-urêmica (SHU) e retinopatia hemorrágica. A paciente apresentou história clínica prévia de dor abdominal, diarréia sanguinolenta e insuficiência renal aguda. Ao exame oftalmológico, a oftalmoscopia indireta evidenciou, em ambos os olhos, extensas áreas de hemorragia em chama de vela, exsudatos algodonosos, edema macular e neovasos na cabeça do nervo óptico. A angiofluoresceinografia mostrou intensa isquemia retiniana bilateral e vazamento na neovascularização de disco. A paciente, a qual apresentava acuidade visual de 20/1000 no olho direito (OD) e 20/540 no olho esquerdo (OE) no primeiro exame, foi tratada com panfotocoagulação retiniana e apresentou no final do 6º mês de acompanhamento a acuidade visual de 20/540 no OD e 20/270 no OE. Observou-se ainda a regressão dos neovasos, das hemorragias retininanas e do edema. Apesar da intensa isquemia retiniana não houve complicações relacionadas à angiogênese como hemorragia vítrea e/ou glaucoma neovascular. Descreve-se, neste relato, a associação entre retinopatia hemorrágicas com características de Purtscher-like e síndrome hemolítico-urêmica.
Subject(s)
Female , Humans , Infant , Hemolytic-Uremic Syndrome/complications , Retinal Hemorrhage/etiology , Retinal Hemorrhage/pathology , Fluorescein Angiography , Laser Coagulation/methods , Neovascularization, Pathologic/surgery , Retinal Hemorrhage/surgery , Treatment Outcome , Visual Acuity/physiologyABSTRACT
Objective : To evaluate the safety, feasibility, and outcome following radical excision of thymoma with resection and reconstruction of invaded mediastinal vessels. Study Design : A retrospective study. Patients and Methods : Six patients with thymoma invading the superior vena cava (SVC) and/or the brachiocephalic veins (BCVs) were reviewed in this study. All the patients underwent radical excision of the tumor along with invaded mediastinal vessels followed by vessel reconstruction or repair. The clinical presentation, operative details, postoperative course, and follow-up were reviewed and analyzed. Results : Three patients presented with features suggestive of SVC syndrome. Contrast-enhanced computed tomography of the chest was the primary imaging modality, which detected a tumor with invasion of major mediastinal veins. WHO type B2 was the commonest histologic type, which was seen in 4 cases. Intraoperatively, SVC invasion, SVC and BCV invasion, and BCV invasions alone were seen in 1, 2, and 3 cases, respectively. The vessels were reconstructed with a prosthetic graft in 3 patients, and autologous pericardial tube graft was used in 1 patient. Two patients had primary repair of the wall of the involved vessel. Postoperative course was complicated by ventilator support requirement in 2, graft thrombosis in 2, acute renal failure in 1 and pneumonia in 1 patient. All patients are alive at the end of follow-up period ranging between 18 and 24 months. Conclusion: Thymoma excision with the reconstruction of SVC or BCV is safe and feasible in experienced hands.
Subject(s)
Adult , Brachiocephalic Veins/surgery , Humans , Male , Mediastinum/surgery , Middle Aged , Neoplasm Staging , Neovascularization, Pathologic/surgery , Plastic Surgery Procedures/methods , Retrospective Studies , Thymoma/blood supply , Thymoma/pathology , Thymoma/surgery , Vascular Surgical Procedures/methods , Vena Cava, Superior/surgeryABSTRACT
Modern vitreoretinal surgery is now one of the most effective tools for treating posterior segment diseases. In the last several years, there has been a surge of interest in submacular surgery which allows removal of submacular choroidal neovascular membranes and haematomas. Various aspects of this rapidly emerging modality of surgery are discussed in this review.
Subject(s)
Choroid/blood supply , Humans , Macula Lutea/surgery , Neovascularization, Pathologic/surgery , Postoperative Complications , Recurrence , Retinal Diseases/surgery , Safety , Treatment Outcome , Vitrectomy/adverse effectsABSTRACT
O surgimento de membranas neo-vasculares sub-retinianas é considerado atualmente como um processo causado pelo afastamento do epitelio pigmentar da membrana de Bruch secundário à formaçäo de drusas ou outras patologias. O reconhecimento clínico destas membranas se faz com a biomicroscopia e com a angiofluoresceinografia. O tratamento convencional é feito pela fotocoagulaçäo com laser de argonio ou kriptonio. Recentemente tem se experimentado o tratamento cirúrgico através da remoçäo mecânica destas membranas