Defining function of wild-type and three patient-specific mutations in a zebrafish model of embryonal rhabdomyosarcoma.

In embryonal rhabdomyosarcoma (ERMS) and generally in sarcomas, the role of wild-type and loss- or gain-of-function mutations remains largely undefined. Eliminating mutant or restoring wild-type p53 is challenging; nevertheless, understanding p53 variant effects on tumorigenesis remains central to realizing better treatment outcomes. In ERMS, >70% of patients retain wild-type , yet mutations when present are associated with worse prognosis.

Atezolizumab in combination with intrathecal chemotherapy and radiation for treatment of isolated cerebral nervous system relapse in a patient with extranodal NK/T cell lymphoma: a case report.

Background: Extranodal NK/T cell lymphoma (ENKTL) is an aggressive form of Epstein-Barr virus (EBV)-associated non-Hodgkin's lymphoma which historically has a poor prognosis. When relapse occurs, particularly in the cerebral nervous system (CNS), survival is rare. The immune checkpoint pathway family of proteins is highly expressed in many human tumors, especially in EBV-related malignancies.

Brain mitochondria as a primary target in the development of treatment strategies for Alzheimer disease.

Alzheimer's disease (AD) and cerebrovascular accidents are two leading causes of age-related dementia. Increasing evidence supports the idea that chronic hypoperfusion is primarily responsible for the pathogenesis that underlies both disease processes. In this regard, hypoperfusion appears to induce oxidative stress (OS), which is largely due to reactive oxygen species (ROS), and over time initiates mitochondrial failure which is known as an initiating factor of AD.

Nitric oxide as an initiator of brain lesions during the development of Alzheimer disease.

Nitric oxide (NO) is an important regulatory molecule for the host defense that plays a fundamental role in the cardiovascular, immune, and nervous systems. NO is synthesized through the conversion of L-arginine to L-citrulline by the enzyme NO synthase (NOS), which is found in three isoforms classified as neuronal (nNOS), inducible (iNOS), and endothelial (eNOS). Recent evidence supports the theory that this bioactive molecule has an influential role in the disruption of normal brain and vascular homeostasis, a condition known to elucidate chronic hypoperfusion which ultimately causes the development of brain lesions and the pathology that typify Alzheimer disease (AD).