Abstract
A silver reduced graphene oxide (Ag-rGO) nanocomposite paste was prepared for the assay of luteinizing hormone (LH) and follicle-stimulating hormone (FSH) in children’s saliva. The paste was modified with a solution of myoglobin (Myb) to form the stochastic biosensor, to improve the sensitivity of the method. The Ag-rGO powder and Myb-Ag-rGO paste were morphologically and structurally characterized by SEM, TEM and XRD measurements. For the molecular recognition of the hormones, the biosensor based on Myb-Ag-rGO reached determination limits of 8.5 × 10−3 UI L−1 (2.0 × 10−12 g/mL) for luteinizing hormone and 1.4 × 10−2 UI L−1 (1.0 × 10−12 g/mL) for follicle-stimulating hormone. The determination of both hormones in saliva samples collected from children was done with high reliability.

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Kakarla N, Bradshaw K. Disorders of pubertal development precocious puberty. Semin Reprod Med. 2003;21:339–51.
Kaplowitz P. Diagnosing children with signs of early puberty: knowing when to test and when to just monitor. Expert Rev Endocrinol Metab. 2016;11:297–9.
Dunkel L, Alfthan H, Stenman UH, Selstam G, Rosberg S, Albertsson-Wikland K. Development changes in 24-hour profiles of luteinizing hormone and follicle-stimulating hormone from prepuberty to midstages of puberty in boys. J Clin Endocrinol Metab. 1992;74:890–7.
Yan F, Zhang M, Li J. Solution-gated graphene transistors for chemical and biological sensors. Adv Healthc Mater. 2014;3:313–31.
Wu JF, Xu MQ, Zhao GC. Graphene-based modified electrode for the direct electron transfer of cytochrome c and biosensing. Electrochem Commun. 2010;12:175–7.
Tashkhourian J, Nezhad MRH, Khodavesi J, Javadi S. Silver nanoparticles modified carbon nanotube paste electrode for simultaneous determination of dopamine and ascorbic acid. J Electroanal Chem. 2009;633:85–91.
Ojani R, Safshekan S, Raoof JB. Silver nanoparticle decorated poly(2-aminodiphenylamine) modified carbon paste electrode as a simple and efficient Electrocatalyst for oxidation of formaldehyde. Chin J Catal. 2014;35:1565–70.
de la Escosura-Muniz A, Mercoki A. A nanochannel/nanoparticle-based filtering and sensing platform for direct detection of a cancer biomarker in blood. Small. 2011;7:675–82.
Seidlitz HK, Schneckenburger H, Stettmeier K. Time-resolved polarization measurements of porphyrin fluorescence in solution and in single cells. J Photochem Photobiol B. 1990;5:391–400.
Hladky SB, Haydon DA. Discreteness of conductance change in bimolecular lipid membranes in the presence of certain antibiotics. Nature. 1970;225:451–3.
Miles BN, Ivanov AP, Wilson KA, Dogan F, Japrung D, Edel JB. Single molecule sensing with solid-state nanopores. Chem Soc Rev. 2013;42:15–28.
Bayley H, Cremer PS. Stochastic sensors inspired by biology. Nature. 2001;413:226–30.
Stefan-van Staden RI, van Staden JF, Balasoiu SC. Disposable stochastic dot sensors for the assay of ascorbic acid in pharmaceutical samples, beverages, and biological fluids. Anal Lett. 2011;44:2280–6.
Stefan-van Staden RI, Gugoasa LA, Biris AR. Pattern recognition of monocyte chemoattractant protein-1 (MCP-1) in whole blood samples using new platforms based on nanostructured materials. Nanoscale. 2015;7:14848–53.
Gugoasa LA, Stefan-van Staden RI, Dima A, Visan CA, Streinu-Cercel A, Biris A, et al. Fast screening of biological fluids for cytokines and adipokines using stochastic sensing. Microelectron Eng. 2015;148:64–9.
Stefan-van Staden RI, Gugoasa LA, Socaci C, Biris AR. New nanocomposites-graphene pastes based stochastic microsensors. RSC Adv. 2015;5:66185–91.
Gugoasa LA, Muklive Al’Ogaidi AJ, Stefan-van Staden RI, El-Khatib A, Rosu MC, Pruneanu S. Multimode microsensors based on Ag–TiO2–graphene materials used for the molecular recognition of carcinoembryonic antigen in whole blood samples. RSC Adv. 2017;7:28419–26.
Gugoasa LA, Muklive Al’Ogaidi AJ, Stefan-van Staden RI, Stanciu-Gavan C, van Staden JF, Rosu MC, et al. Molecular recognition of colon cancer biomarkers: P53, KRAS and CEA in whole blood samples. J Electrochem Soc. 2017;164:B443–7.
Stefan-van Staden RI, Balahura LR, Gugoasa LA, Aboul-Enein H, van Staden JF, Rosu MC, et al. Pattern recognition of 8-hydroxy-2′-deoxyguanosine in biological fluids. Anal Bioanal Chem. 2018;410:115–21.
Merchant CA, Healy K, Wanunu M, Ray V, Peterman N, Bartel J, et al. DNA translocation through graphene nanopores. Nano Lett. 2010;10:2915–21.
Siwy ZS, Davenport M. Nanopores: graphene opens up to DNA. Nat Nanotechnol. 2010;5:697–8.
Stargardt JF, Hawkridge FM, Landrum HL. Reversible heterogeneous reduction and oxidation of sperm whale myoglobin at a surface modified gold minigrid electrode. Anal Chem. 1978;50:930–2.
Pogacean F, Coros M, Magerusan L, Mirel V, Turza A, Katona G, et al. Exfoliation of graphite rods via pulses of current for graphene synthesis: sensitive detection of 8-hydroxy-2′-deoxyguanosine. Talanta. 2019;196:182–90.
Udayabhaskar R, Mangalaraja RV, Pandiyarajan T, Karthikeyan B, Mansilla HD, Contreras D. Spectroscopic investigation on graphene-copper nanocomposites with strong UV emission and high catalytic activity. Carbon. 2017;124:256–62.
Garaj S, Liu S, Golovchenko JA, Branton D. Molecule-hugging graphene nanopores. Proc Natl Acad Sci U S A. 2013;110:12192–6.
Hoogerheide DP, Gurnev PA, Rostovtseva TK, Bezrukov SM. Real-time nanopore-based recognition of protein translocation success. Biophys J. 2018;114:772–6.
Alotaibi MF. Physiology of puberty in boys and girls and pathological disorders affecting its onset. J Adolesc. 2019;71:63–71.
Loomba-Albrecht LA, Styne DM. The physiology of puberty and its disorders. Pediatr Ann. 2012;41:e1–9.
Qu Y, Berghman LR, Vandesande F. An electrochemical enzyme immunoassay for chicken luteinizing hormone: extension of the detection limit by adequate control of the nonspecific adsorption. Anal Biochem. 1998;259:167–75.
Pritchard DJ, Morgan H, Cooper JM. Simultaneous determination of follicle stimulating hormone and luteinising hormone using a multianalyte immunosensor. Anal Chim Acta. 1995;310:251–6.
Trevino J, Calle A, Rodriguez-Frade JM, Mellado M, Lechuga LM. Surface plasmon resonance immunoassay analysis of pituitary hormones in urine and serum samples. Clin Chim Acta. 2009;403:56–62.
Brindle E, Miller RC, Shofer JB, Klein NA, Soules MR, O’Connor KA. Urinary beta-luteinizing hormone and beta-follicle stimulating hormone immunoenzymometric assays for population research. Clin Biochem. 2006;39:1071–9.
Aizen J, Kasuto H, Levavi-Sivan B. Development of specific enzyme-linked immunosorbent assay for determining LH and FSH levels in tilapia, using recombinant gonadotropins. Gen Comp Endocrinol. 2007;153:323–32.
Acknowledgments
The authors are grateful to Dr. Lucian-Barbu Tudoran for performing TEM/SEM measurements and to PhD student Alexandru Turza for recording the XRD measurements.
Funding
This work was financially supported by a grant of the Ministry of Research and Innovation, CNCS-UEFISCDI, project number PN-III-P1-1.1-PD-2016-0190, within PNCDI III. TEM/SEM measurements were partially supported through the infrastructure obtained in the Project: Research Center and Advanced Technologies for Alternative Energies - CETATEA - 623/11.03.2014.
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Published in the topical collection Euroanalysis XX with guest editor Sibel A. Ozkan.
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Gugoasa, L.A.D., Stefan-van Staden, RI., van Staden, J.F. et al. Myoglobin-silver reduced graphene oxide nanocomposite stochastic biosensor for the determination of luteinizing hormone and follicle-stimulating hormone from saliva samples. Anal Bioanal Chem 412, 5191–5202 (2020). https://doi.org/10.1007/s00216-020-02663-z
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DOI: https://doi.org/10.1007/s00216-020-02663-z

