Synthetic conformational antigen which simulates the extracellular part of the M2-muscarinic receptor: interaction with blood sera of patients suffering from idiopathic arrhythmias |
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Authors: | M E Palkeeva M V Sidorova A S Molokoedov A A Az’muko Zh D Bespalova T V Sharf E N Mamochkina E E Efremov M M Rogova N A Mironova K A Zykov S P Golitsyn |
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Institution: | 16467. Russian Cardiological Research and Production Complex, Russian Ministry of Public Health, ul. 3-ya Cherepkovskaya 15a, Moscow, 121552, Russia
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Abstract: | Fragments corresponding to the 83–98 sequence of the first extracellular loop and to the 168–192 and 171–182 sequences of the second extracellular loop of the M2-muscarinic receptor (antibodies to this receptor could be markers of early symptoms of heart disorders) were synthesized by solid phase method using the Fmoc-SPPS strategy. A new conformational antigen with the natural location of the disulfide bridge was prepared by selective formation of disulfide bond between the corresponding cysteine residues in the synthe-sized peptides and characterized. The comparative analysis of reactivity of the synthesized peptides towards sera from patients which had no organic heart disease was performed. A new conformational antigen was effectively bound to the sera from patients with idiopathic arrhythmias, but without symptoms of organic heart disease. |
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