Interleukin-10, an important regulator of both the innate and adaptive immune systems, is a multifunctional major cytokine. Though it is one of the major cytokines, IL-10 from the Indian major carp, has not yet been characterized. In the present study, we report large scale production and purification of biologically active recombinant IL-10 of (rIL-10) using a heterologous expression system and its biophysical and functional characterization. High yield (~70 mg/L) of soluble rIL-10 was obtained at shake flask level. The rIL-10 was found to exist as a dimer. Far-UV CD spectroscopy showed presence of predominantly alpha helices. The tertiary structure of the purified rIL-10 was verified by fluorescence spectroscopy. Two-dimensional gel analysis revealed the presence of six isoforms of the rIL-10. The rIL-10 was biologically active and its administration significantly reduced serum proinflammatory cytokines, namely, interleukin 1, TNF, and IL-8, and augmented the NKEF transcript levels in spleen of . Anti-inflammatory role of the rIL-10 was further established by inhibition of phagocytosis using NBT reduction assay The data indicate that the dimeric alpha helical structure and function of IL-10 of as a key regulator of anti-inflammatory response have remained conserved during evolution.
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| http://dx.doi.org/10.1155/2016/3962596 | DOI Listing |
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