A dual-mode RNA-splitting aptamer biosensor for sensitive HIV Tat peptide detection via colorimetry and fluorescence.

Early diagnosis of human immunodeficiency virus (HIV) is critical for effective treatment; however, traditional antibody methods encounter challenges during the infection window, and nucleic acid tests require specialized equipment. In this study, a dual-mode ribonucleic acid (RNA)-splitting aptamer biosensor was developed to target the HIV trans-activator of transcription (Tat) protein, a key HIV biomarker for viral replication throughout the infection cycle. The biosensor integrates colorimetric and fluorescent detection techniques by utilizing gold nanoparticles (AuNPs) and two types of aptamers, one labeled with carboxyfluorescein (FAM).

[Imaging diagnosis of lumbar spinal stenosis].

Objective: To investigate value of X-ray, CT and MRI for the diagnosis of lumbar spinal stenosis.

Methods: The data of 130 patients with clinical diagnosis and typical imaging signs of lumbar spinal stenosis were analyzed. The present study included 83 males and 47 females with an average age of 43.