Concordance between the updated Elecsys cerebrospinal fluid immunoassays and amyloid positron emission tomography for Alzheimer's disease assessment: findings from the Apollo study.

Objectives: The Apollo study was designed to support the clinical performance verification of the adjusted cutoffs of the Elecsys β-Amyloid(1-42) (Aβ) cerebrospinal fluid (CSF) II, β-Amyloid(1-40) (Aβ) CSF, Phospho-Tau (181P) (pTau) CSF and Total-Tau (tTau) CSF immunoassays (Roche Diagnostics International Ltd) for measuring fresh CSF samples, and assess the concordance of the Elecsys CSF pTau/Aβ, tTau/Aβ and Aβ/Aβ ratios, as well as Aβ alone, with amyloid positron emission tomography (PET) visual read status.

Methods: The primary study endpoint was to assess the concordance of the Elecsys CSF ratios and Aβ alone with amyloid PET visual read status using fresh CSF samples collected from individuals with subjective cognitive decline or mild cognitive impairment, handled with a new routine-use pre-analytical procedure and measured with the Elecsys CSF immunoassays. The sample stability after 1- to 13-week storage at -20 °C was also investigated in an exploratory analysis.

Management of gastrointestinal bleed in the intensive care setting, an updated literature review.

Gastrointestinal (GI) bleeding is a critical and potentially life-threatening condition frequently observed in the intensive care unit (ICU). This literature review consolidates current insights on the epidemiology, etiology, management, and outcomes of GI bleeding in critically ill patients. GI bleeding remains a significant concern, especially among patients with underlying risk factors such as coagulopathy, mechanical ventilation, and renal failure.

Controllable intein splicing and N-terminal cleavage at mesophilic temperatures.

Inteins (intervening proteins) interrupt host proteins and are removed through a protein splicing reaction that ligates adjacent N- and C-exteins. The ability of inteins to specifically rearrange peptide bonds has proven exceptionally useful in protein engineering, thus, methods to control intein activity are of considerable interest. One particularly useful application of inteins is for the removal of an affinity tag following purification of a target protein through N-terminal cleavage (NTC).

Rifabutin-Induced Thrombocytopenia in a Patient With Uncontrolled HIV: A Case Report.

Uncontrolled HIV is associated with a wide range of hematologic abnormalities through direct suppressive effects, opportunistic infections, tumor marrow infiltration, or antiretroviral, antimicrobial, or antitumor therapy. We present a patient with a history of uncontrolled HIV presenting with acute severe thrombocytopenia shortly after starting treatment for disseminated Mycobacterium avium complex (MAC). While the thrombocytopenia was resistant to transfusion and intravenous immunoglobulin (IVIG), it mildly improved with dexamethasone after holding home medications.