ABSTRACT
Mass spectrometry is broadly employed to study complex molecular mechanisms in various biological and environmental fields, enabling 'omics' research such as proteomics, metabolomics, and lipidomics. As study cohorts grow larger and more complex with dozens to hundreds of samples, the need for robust quality control (QC) measures through automated software tools becomes paramount to ensure the integrity, high quality, and validity of scientific conclusions from downstream analyses and minimize the waste of resources. Since existing QC tools are mostly dedicated to proteomics, automated solutions supporting metabolomics are needed. To address this need, we developed the software PeakQC, a tool for automated QC of MS data that is independent of omics molecular types (i.e., omics-agnostic). It allows automated extraction and inspection of peak metrics of precursor ions (e.g., errors in mass, retention time, arrival time) and supports various instrumentations and acquisition types, from infusion experiments or using liquid chromatography and/or ion mobility spectrometry front-end separations and with/without fragmentation spectra from data-dependent or independent acquisition analyses. Diagnostic plots for fragmentation spectra are also generated. Here, we describe and illustrate PeakQC's functionalities using different representative data sets, demonstrating its utility as a valuable tool for enhancing the quality and reliability of omics mass spectrometry analyses.
ABSTRACT
BACKGROUND AND PURPOSE: Studies have suggested that peroneal nerve functional electrical stimulation (peroneal FES) during walking improves gait in patients with chronic stroke. The effect of peroneal FES during the acute stages of stroke recovery is not known. The purposes of this case report are: (1) to describe differences between walking with and without a neuroprosthesis during the first few weeks after stroke, (2) to offer a clinical perspective on decision making for the use of peroneal FES during acute rehabilitation, and (3) to determine the feasibility of rehabilitation with peroneal FES neuroprostheses during the acute phases of stroke recovery. CASE DESCRIPTION: This case report describes 2 patients with different clinical presentations but both receiving inpatient rehabilitation less than 2 weeks after stroke. Each patient received peroneal FES via a neuroprothesis as tolerated while gait training in therapy. OUTCOMES: One patient immediately increased gait speed (128%) and decreased time to perform the Timed "Up & Go" Test (40%) using the neuroprothesis. Both patients immediately increased the 6-Minute Walk Test distance using the neuroprothesis (121% and 101%). The patient who underwent testing with the instrumented walking system also demonstrated improved gait symmetry. After 1 to 3 weeks of using the neuroprothesis, the difference between outcomes with and without the neuroprothesis decreased. DISCUSSION: It is possible that peroneal FES delivered through a neuroprosthesis during acute stroke recovery may improve gait outcomes. Research is needed to determine proper duration and timing.