Designing of a unique bioreceptor and fabrication of an efficient genosensing platform for neonatal sepsis detection

Nanomaterial Modified Screen Printed Electrode Based Electrochemical Genosensor for Efficient Detection of Neonatal Sepsis

The present work reports fabrication of nanomaterial based electrochemical genosensor for efficient detection of neonatal sepsis. For this purpose, virulent cfb gene of its major causative organisms, i.e. Group B Streptococcus (GBS) was selected. Further, a cfb specific 19-mer long amine terminated DNA probe was designed to be used as bioreceptor. The genosensing platform is fabricated by utilizing graphene oxide as nanomaterial which is deposited onto screen printed electrode (SPE) by electrophoretic deposition technique. Thereafter, the designed probe DNA is immobilized on graphene oxide modified SPE through EDC-NHS chemistry. Characterization of nanomaterial and fabricated genosensing platform is studied via X-ray diffraction, Scanning electron microscopy, atomic force microscopy, Fourier transmission infrared spectroscopy and cyclic voltammetry techniques. The fabricated genosensor (BSA/pDNA/GO/SPE) is able to efficiently detect target cfb gene with a linear detection range of 10-12-10-7 M, lower detection limit of 10-12 M and sensitivity of 725.9 µA M-1 cm-2. The biosensing ability of developed genosenor is also investigated in artificial serum sample and the obtained results are found within acceptable percentage relative standard deviation (%RSD), indicating its application in detecting neonatal sepsis in serum samples.

Supplementary Information

The online version contains supplementary material available at 10.1007/s12088-024-01348-w.

Nanomaterial-based methods for sepsis management

Sepsis is a serious disease caused by an impaired host immune response to infection, resulting in organ dysfunction, tissue damage and is responsible for high in-hospital mortality (approximately 20%). Recently, WHO documented sepsis as a global health priority. Nevertheless, there is still no effective and specific therapy for clinically detecting sepsis. Nanomaterial-based approaches have appeared as promising tools for identifying bacterial infections. In this review, recent biosensors are introduced and summarized as nanomaterial-based platforms for sepsis management and severe complications. Biosensors can be used as tools for the diagnosis and treatment of sepsis and as nanocarriers for drug delivery. In general, diagnostic methods for sepsis-associated bacteria, biosensors developed for this purpose are presented in detail, and their strengths and weaknesses are discussed. In other words, readers of this article will gain a comprehensive understanding of biosensors and their applications in sepsis management.