en بیوتکنولوژی Biotechnology پژوهشي Original Research Monoclonal Antibodies (mAbs) are used for biomedical research, diagnosis, treatment, production, and the quality control of biological products. mAbs are also very helpful in poliovirus research studies because it is still one of the major public health problems in developing countries. The main objective of this study was the production of mAbs against Poliovirus Type 2 (PV2) to be prepared and respond to the re-emergence of this virus. After fusion of immunized B cells prepared from mice with myeloma tumor cells and screening of about 250 hybridoma colonies, 22 with the highest antibody titer and without cross-reaction with others types were selected and cloned by limiting dilution. In the end, two colonies capable of secreting mAbs against epitopes of  PV2  were used to produce mAbs. The mAbs were characterized by antibody assays, isotyping, and epitopes analysis using western blotting test, the cross-reactivity with other types, as well as stability, sterility, and mycoplasma tests. The results indicated that the produced mAbs had high specificity, sensitivity and stability against PV2 without any cross-reactivity and were of IgG1 Kappa chain with similar bands at 26 kDa during electrophoresis associated with viral protein VP3 neutralization. These mAbs were specific in serum neutralization tests for PV2 vaccine strain, and therefore, they are potentially valuable for routine polio research, diagnosis, isolation, production, and control of poliovirus vaccines. Monoclonal antibody, Hybridoma, Cloning, Polio type 2, Virus 15 19 http://pbr.mazums.ac.ir/browse.php?a_code=A-10-651-1&slc_lang=en&sid=1 Morteza Kamalzadeh مرتضی کمال زاده m.kamalzadeh@rvsri.ac.ir 10031947532846004003 10031947532846004003 No Department of viral quality control, Razi Vaccine and Serum Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran مسئول آزمایشگاه کنترل کیفی واکسن های ویروسی Sina Soleimani سینا سلیمانی s.soleimani@rvsri.ac.ir 10031947532846004004 10031947532846004004 Yes Department of Biobank, Razi Vaccine and Serum Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran عضو هیئت علمی ومدیر کنترل کیفیت Mohsen Lotfi محسن لطفی m.lotfi@rvsri.ac.ir 10031947532846004005 10031947532846004005 No Department of viral quality control, Razi Vaccine and Serum Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran عضو هیئت علمی و رئیس بخش کنترل واکسن های ویروسی