RESUMO
BACKGROUND/AIMS: Neuroinflammation plays a crucial role in the pathogenesis of Alzheimer's disease (AD). Its relationship with underlying ß amyloid deposition remains unclear. In vivo visualization of microglial activation has become possible with the development of molecular imaging ligands when used with positron emission tomography (PET). The translocator protein (TSPO) is upregulated during neuroinflammation. Consequently, targeting TSPO with radiolabeled ligands for PET is an attractive biomarker for neuroinflammation. METHODS: A review of the research literature on PET imaging which studied in vivo neuroinflammation in AD subjects and its relationship with amyloid load was performed, including papers published between 2001 and 2012. RESULTS: Six studies were included using either [(11)C]PK-11195 or another non-TSPO radioligand that binds to the monoaminooxidase B. All the studies evaluated amyloid load with [(11)C]PIB. Microglial activation and astrocytosis are potentially early phenomena in AD. However, the individual levels of amyloid deposition and microglial activation were not correlated. CONCLUSION: Noninvasive in vivo molecular imaging to visualize neuroinflammation in AD may contribute to our understanding of the kinetics of neuroinflammation and its relationship to the hallmarks of the disease. Both are important for the development of future therapeutic modalities and for quantifying the efficacy of future disease-modifying treatments.
Assuntos
Doença de Alzheimer/metabolismo , Doença de Alzheimer/patologia , Peptídeos beta-Amiloides/metabolismo , Encéfalo/patologia , Inflamação/patologia , Imagem Molecular/métodos , Idoso , Idoso de 80 Anos ou mais , Doença de Alzheimer/diagnóstico por imagem , Compostos de Anilina , Benzotiazóis , Humanos , Isoquinolinas , Translocases Mitocondriais de ADP e ATP/metabolismo , Monoaminoxidase/metabolismo , Tomografia por Emissão de Pósitrons , Compostos Radiofarmacêuticos , Tiazóis , Proteínas tau/metabolismoRESUMO
Brachytherapy is a form of radiation therapy used to treat a variety of cancers. Patients undergoing gynecological brachytherapy face a variety of physical, emotional, and psychosocial issues. Nurses caring for patients receiving high-dose rate or low-dose rate brachytherapy must be knowledgeable about radiation therapy principles and technology and the acute and chronic side effects that patients may experience.