Discrimination between Alpha-Synuclein Protein Variants with a Single Nanometer-Scale Pore.

Alpha-synuclein is one of several key factors in the regulation of nerve activity. It is striking that single- or multiple-point mutations in the 140-amino-acid-long protein can change its structure, which leads to the protein's aggregation and fibril formation (which is associated with several neurodegenerative diseases, , Parkinson's disease). We recently demonstrated that a single nanometer-scale pore can identify proteins based on its ability to discriminate between protease-generated polypeptide fragments.

Sleep Disorders and Quality of Life in Patients With Cancer: Prospective Observational Study of the Rafael Institute.

Background: Sleep disorders are a common occurrence in the general population. Yet today, it is clearly agreed that sleep disorders represent both a cancer risk factor and a biological consequence of the of the activation of the immuno-inflammatory system induced by cancer itself.

Objective: The aim of this study was to assess the impact of sleep disorders on quality of life and identify the type of disorder and its causes in order to offer an adapted and personalized care plan.

Spontaneous regression of an orbital Langerhans cell histiocytosis after biopsy: A case report. Spontaneous regression of an orbital Langerhans cell histiocytosis.

Langerhans histiocytosis or Langerhans cell histiocytosis (LCH) is a rare benign pathology representing less than 1% of orbital tumors. It can cause either localized or generalized lesions, leading to the destruction of hard and soft tissues. Eosinophilic granuloma is the most benign form and the predominant clinical presentation of LCH.

On possible trypsin-induced biases in peptides analysis with aerolysin nanopore.

Nanopore-based single-molecule analysis technique is a promising approach in the field of proteomics. In this Technical Brief, the interaction between the biological nanopore of Aerolysin (AeL) and peptides is investigated, focusing on potential biases depending on the AeL activation protocol. Our results reveal that residual trypsin, which may be unintentionally introduced in analyte solution when using a classical AeL activation protocol, can induce a significant formation of shorter peptides by enzymatic degradation of longer ones, which may lead to unwanted effects and/or misinterpretations.

Impact of local treatment on survival from hematological malignancies causing spinal cord compression.

Background: Various hematological malignancies, including multiple myeloma, plasmacytoma, aggressive lymphoma, and indolent lymphoma, rarely result in spinal cord compression.

Methods: Here, we retrospectively analyzed 32 patients with multiple myeloma (50%), plasmacytoma (13%), aggressive lymphoma (28%), and indolent lymphoma (9%), resulting in spinal cord compression (2004 and 2016). Patients averaged 57 years of age and presented with the indolent onset of spinal cord compression (91% of cases) resulting mostly in motor deficits (69%).