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Kaushik A, Yndart A, Jayant RD, Sagar V, Atluri V, Bhansali S, Nair M. Electrochemical sensing method for point-of-care cortisol detection in human immunodeficiency virus-infected patients. Int J Nanomedicine 2015; 10:677-85. [PMID: 25632229 PMCID: PMC4304596 DOI: 10.2147/ijn.s75514] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
A novel electrochemical sensing method was devised for the first time to detect plasma cortisol, a potential psychological stress biomarker, in human immunodeficiency virus (HIV)-positive subjects. A miniaturized potentiostat (reconfigured LMP91000 chip) interfaced with a microfluidic manifold containing a cortisol immunosensor was employed to demonstrate electrochemical cortisol sensing. This fully integrated and optimized electrochemical sensing device exhibited a wide cortisol-detection range from 10 pg/mL to 500 ng/mL, a low detection limit of 10 pg/mL, and sensitivity of 5.8 μA (pg mL)−1, with a regression coefficient of 0.995. This cortisol-selective sensing system was employed to estimate plasma cortisol in ten samples from HIV patients. The electrochemical cortisol-sensing performance was validated using an enzyme-linked immunosorbent assay technique. The results obtained using both methodologies were comparable within 2%–5% variation. The information related to psychological stress of HIV patients can be correlated with disease-progression parameters to optimize diagnosis, therapeutic, and personalized health monitoring.
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Affiliation(s)
- Ajeet Kaushik
- Center of Personalized Nanomedicine, Institute of Neuroimmune Pharmacology, Department of Immun ology, Herbert Wertheim College of Medicine, Florida International University, Miami, FL, USA
| | - Adriana Yndart
- Center of Personalized Nanomedicine, Institute of Neuroimmune Pharmacology, Department of Immun ology, Herbert Wertheim College of Medicine, Florida International University, Miami, FL, USA
| | - Rahul Dev Jayant
- Center of Personalized Nanomedicine, Institute of Neuroimmune Pharmacology, Department of Immun ology, Herbert Wertheim College of Medicine, Florida International University, Miami, FL, USA
| | - Vidya Sagar
- Center of Personalized Nanomedicine, Institute of Neuroimmune Pharmacology, Department of Immun ology, Herbert Wertheim College of Medicine, Florida International University, Miami, FL, USA
| | - Venkata Atluri
- Center of Personalized Nanomedicine, Institute of Neuroimmune Pharmacology, Department of Immun ology, Herbert Wertheim College of Medicine, Florida International University, Miami, FL, USA
| | - Shekhar Bhansali
- BioMEMS Microsystems Laboratory, Department of Electrical and Computer Engineering, Florida International University, Miami, FL, USA
| | - Madhavan Nair
- Center of Personalized Nanomedicine, Institute of Neuroimmune Pharmacology, Department of Immun ology, Herbert Wertheim College of Medicine, Florida International University, Miami, FL, USA
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