Anti-Chikungunya Virus (Clone: CHKV-35) – Low Endotoxin Functional Formulation

B cells of a survivor of natural CHIKV infection

This recombinant monoclonal antibody is aseptically packaged and formulated in 0.01 M phosphate buffered saline (150 mM NaCl) PBS pH 7.2 - 7.4 with no carrier protein, potassium, calcium or preservatives added. Due to inherent biochemical properties of antibodies, certain products may be prone to precipitation over time. Precipitation may be removed by aseptic centrifugation and/or filtration.

Recombinant antibodies are manufactured in an animal free facility using only in vitro protein free cell culture techniques and are purified by a multi-step process including the use of protein A or G to assure extremely low levels of endotoxins, leachable protein A or aggregates.

Functional grade preclinical antibodies may be stored sterile as received at 2-8°C for up to one year. For longer term storage, aseptically aliquot in working volumes without diluting and store at ≥ -70°C. Avoid Repeated Freeze Thaw Cycles.

Standard Overnight on Blue Ice.

ELISA
N

The monoclonal antibody clone CHKV-35 binds to and neutralizes CHIKV vaccine strain 181/25

The E2 Envelope protein is expressed on the surface of the Chikungunya Virus

Chikungunya virus (CHIKV) is a mosquito-transmitted alphavirus that causes epidemics globally and has been declared a notable disease by the CDC^1,2. Symptoms include high fever, myalgia, rash, and severe polyarthritis which can persist for long after acute infection. CHIKV is an enveloped virus with an 11.8-kb single-stranded, positive-sense RNA genome with two open reading frames^3,4. There are three main genotypes, having 95.2 to 99.8% amino acid identity: Asian, West African, and East/Central/South African (ECSA). The mature CHIKV virion is comprised of a nucleocapsid protein C and two glycoproteins, E1 and E2⁵. E1 participates in virus fusion. E2 functions in attachment to cells. E1 and E2 form 80 trimeric spikes on the virus surface⁶.

Co-circulation of CHIKV with other arboviruses, such as dengue, Zika, Mayaro, and yellow fever, occurs in many countries, posing significant difficulties for diagnosis². Monoclonal antibodies (MAb) can be used both for diagnosis⁷ and as a therapeutic agent^5,8,9. CHIKV can be rapidly detected by an immunochromatographic assay using MAbs against the CHIKV envelope protein⁷.

CHKV-35 was generated from peripheral blood mononuclear cells from an immune donor by Epstein-Barr Virus transformation followed by hybridoma generation¹⁰. CHKV-35 binds to and neutralizes CHIKV vaccine strain 181/25.

1. Barrera, R., Hunsperger, E., Lanciotti, RS. et al. Preparedness and response for chikungunya virus introduction in the Americas. Pan American Health Organization; National Center for Emerging and Zoonotic Infectious Diseases (U.S.). Division of Vector-Borne Diseases. 2011.
2. Silva, JVJ Jr., Ludwig-Begall, LF., Oliveira-Filho, EF. et al. Acta Trop. 188:213-224. 2018.
3. Powers, AM., Brault, AC., Tesh, RB. et al. J. Gen. Virol. 81:471–479. 2000.
4. Arankalle, VA., Shrivastava, S., Cherian, S. et al. J. Gen. Virol. 88:1967–1976. 2007.
5. Pal, P., Dowd, KA., Brien, JD. et al. PLoS Pathog. 9(4):e1003312. 2013.
6. Mukhopadhyay, S., Zhang, W., Gabler, S. et al. Structure. 14(1):63-73. 2006.
7. Okabayashi, T., Sasaki, T., Masrinoul, P. et al. J Clin Microbiol. 53(2):382-388. 2015.
8. Hawman, DW., Stoermer, KA., Montgomery, SA. et al. J Virol. 87(24):13878-13888. 2013.
9. Pal, P, Fox, JM., Hawman, DW. et al. J Virol. 88(15):8213-8226. 2014.
10. Kose N, Fox JM, Sapparapu G, et al. Sci Immunol. 4(35):eaaw6647. 2019.