scholarly journals Analysis of Blood Hemoglobin Levels Using Biosensors Based on Heme Oxygenase from Serratia marcescens

2021 ◽  
Vol 7 (1) ◽  
pp. 37-46
Author(s):  
Ahmad Irvan Pratama ◽  
Aisyah Sahara ◽  
Sintia Intan Agsari

Kadar hemoglobin pada manusia dipengaruhi oleh gizi, kondisi zat besi dan metabolismedalam tubuh. Salah satu gangguan medis terkait darah manusia khususnya kadar eritrosit adalahanemia. Kondisi ini menyebabkan perlunya metode pengukuran kadar hemoglobin darah yangefektif dan efisien termasuk dari segi biaya. Salah satu alternatif pengukuran kadar hemoglobinyang dapat digunakan adalah dengan sensor berbasis heme oksigenase dari Serratia marcescensPenelitian ini bertujuan mengembangkan teknik pengukuran kadar hemoglobin darah denganmemanfaatkan sensor hayati berbasis enzim heme oksigenase dari Serratia marcescens. Tahapanyang dilalui pada penelitian ini adalah peremajaan dan produksi isolat Serratia marcescens,isolasi heme oksigenase, pemurnian parsial enzim dengan larutan yang mengandung 45-65% dan65-85% amonium sulfat jenuh, pengukuran kadar protein dengan metode Bradford dan aktivitasenzim, amobilisasi enzim ke permukaan Screen Printed Carbon Electrode (SPCE), dan uji kinetikabiosensor heme oksigenase. Uji kadar protein dan aktivitas enzim menghasilkan aktivitas spesifikenzim pada fraksi 45-65% sebesar 0.0158 U/mg dan pada fraksi 65-85% sebesar 0.0069 U/mg,sehingga fraksi yang digunakan pada biosensor adalah fraksi 45-65%. Uji kinetika biosensormenghasilkan kadar hemoglobin sebesar 12.0, 13.8, dan 14.3 g/dL pada sampel darah A, B, dan C,sedangkan hasil pengukuran dengan uji laboratorium standar berturut-turut sebesar 13.2, 13.4,dan 14.2 g/dL. Kesimpulan yang didapatkan dari penelitian ini ialah biosensor yang telah dibuatdapat mengukur kadar hemoglobin pada darah sampel dengan presisi sebesar 0.8 dan akurasi96.04%.

2012 ◽  
Vol 571 ◽  
pp. 56-59
Author(s):  
Yu Fang Sha ◽  
Mei Zhao ◽  
Ming Quan Yang ◽  
Hai Xin Bai ◽  
Man Zhao

Biological multilayer films of redox polymer and horseradish peroxidase (HRP) were successfully assembled on a screen-printed carbon electrode using layer-by-layer (LBL) assembled method based on the electrostatic interaction. The screen-printed carbon electrode surface was modified by the positively charged redox polymer, and the negatively charged HRP by LBL method.


2021 ◽  
pp. 130574
Author(s):  
P.E. Resmi ◽  
Jeethu Raveendran ◽  
P.V. Suneesh ◽  
T. Ramanchandran ◽  
Bipin G Nair ◽  
...  

2014 ◽  
Vol 447 ◽  
pp. 162-168 ◽  
Author(s):  
Nicolaj Cruys-Bagger ◽  
Hirosuke Tatsumi ◽  
Kim Borch ◽  
Peter Westh

Talanta ◽  
2012 ◽  
Vol 88 ◽  
pp. 432-438 ◽  
Author(s):  
Julien Biscay ◽  
Estefanía Costa Rama ◽  
María Begoña González García ◽  
A. Julio Reviejo ◽  
José Manuel Pingarrón Carrazón ◽  
...  

Sensors ◽  
2018 ◽  
Vol 18 (12) ◽  
pp. 4324 ◽  
Author(s):  
Nurul Talib ◽  
Faridah Salam ◽  
Yusran Sulaiman

Clenbuterol (CLB) is an antibiotic and illegal growth promoter drug that has a long half-life and easily remains as residue and contaminates the animal-based food product that leads to various health problems. In this work, electrochemical immunosensor based on poly(3,4-ethylenedioxythiophene)/graphene oxide (PEDOT/GO) modified screen-printed carbon electrode (SPCE) for CLB detection was developed for antibiotic monitoring in a food product. The modification of SPCE with PEDOT/GO as a sensor platform was performed through electropolymerization, while the electrochemical assay was accomplished while using direct competitive format in which the free CLB and clenbuterol-horseradish peroxidase (CLB-HRP) in the solution will compete to form binding with the polyclonal anti-clenbuterol antibody (Ab) immobilized onto the modified electrode surface. A linear standard CLB calibration curve with R2 = 0.9619 and low limit of detection (0.196 ng mL−1) was reported. Analysis of milk samples indicated that this immunosensor was able to detect CLB in real samples and the results that were obtained were comparable with enzyme-linked immunosorbent assays (ELISA).


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