Robust acidic pH and digestive enzyme stability of anti-SarsCov2 IgY antibodies: Implications for treatment of viral transmission thru gastrointestinal, ocular, nasal and skin tissues
Battula, S.; K, S.; Meher, K.; Reddy R.N, A.; Kadiyala, G.; Iyer, S.; Vangala, S.; Chandran, S.; Saxena, U.
Show abstract
There are many paths for the transmission of SarsCov2 virus. The main routes are nasal and oral and the droplets carrying the virus can also be transmitted thru ocular and skin tissues. The gastrointestinal (small intestine), nasal, ocular and skin tissues all present an acidic pH milieu and therefore any treatment with antibodies thru these routes has to have the antibodies remain active at acid pH as well as be resistant to typical protease digestion. To this end we profiled our anti-SarasCov2 receptor binding domain IgY antibodies for retention of activity at acidic and basic pHs and trypsin digestion. We find that the IgY are strongly resistant to denaturation at acid pH as well as not digested by trypsin. Our data strongly support the use of these IgY in treatment of viral transmission thru the GI, nasal, ocular and skin all tissues where the pH is acidic. We also provide an enabling platform to rapidly asses the suitability of any antibody or protein therapeutic for use at acidic pH.
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