Abstract
Background: Interleukin 2 (IL-2) is a vital cytokine in the induction of T and NK cell responses, the proliferation of CD8+ T cells, and the effective treatment of human cancers such as melanoma and renal cell carcinoma. However, widespread use of this cytokine is limited due to its short half-life, severe toxicity, lack of specific tumor targeting, and activation of Treg cells mediated by high-affinity interleukin-2 receptors.
Objective: In this study, a tumor-targeting LIV-1 VHH-mutIL2 immunocytokine with reduced CD25 (α chain of the high-affinity IL-2 receptor) binding activity was developed to improve IL-2 half-life by decreasing its renal infiltration in comparison with wild and mutant IL-2 molecules.
Methods: The recombinant immunocytokine was designed and expressed. The biological activity of the purified fusion protein was investigated in in vitro and in vivo experiments.
Results: The fusion protein represented specific binding to MCF7 (the breast cancer cell line) and more efficient cytotoxicity than wild-type IL-2 and mutant IL-2. The PK parameters of the recombinant immunocytokine were also improved in comparison to the IL-2 molecules.
Conclusion: The observed results showed that LIV1-mIL2 immunocytokine could be considered as an effective agent in the LIV-1-targeted treatment of cancers due to its longer half-life and stronger cytotoxicity.
[http://dx.doi.org/10.1080/2162402X.2016.1163462] [PMID: 27471638]
[http://dx.doi.org/10.1016/j.bbrc.2016.10.011] [PMID: 27720718]
[http://dx.doi.org/10.1016/j.immuni.2013.01.004] [PMID: 23352221]
[http://dx.doi.org/10.4049/jimmunol.1201895] [PMID: 23677467]
[http://dx.doi.org/10.3389/fimmu.2023.1090311] [PMID: 36936961]
[http://dx.doi.org/10.1586/1744666X.2014.875856] [PMID: 24410537]
[http://dx.doi.org/10.1182/blood-2008-05-160747] [PMID: 19005180]
[http://dx.doi.org/10.1016/j.drudis.2012.01.007] [PMID: 22289353]
[http://dx.doi.org/10.3390/antib1020149] [PMID: 24634778]
[http://dx.doi.org/10.1517/14712598.8.5.609] [PMID: 18407765]
[http://dx.doi.org/10.1158/1078-0432.CCR-07-5041] [PMID: 18927291]
[http://dx.doi.org/10.1038/nrc3236] [PMID: 22437872]
[http://dx.doi.org/10.1158/1078-0432.CCR-10-2921] [PMID: 21531812]
[http://dx.doi.org/10.1186/1471-2407-13-20] [PMID: 23320927]
[http://dx.doi.org/10.1007/s00018-022-04514-9] [PMID: 36066630]
[http://dx.doi.org/10.1124/pr.114.009373] [PMID: 26589413]
[http://dx.doi.org/10.3389/fimmu.2017.01746] [PMID: 29276515]
[http://dx.doi.org/10.1002/anie.201708459] [PMID: 28913971]
[http://dx.doi.org/10.1016/j.tibtech.2013.10.002] [PMID: 24183828]
[http://dx.doi.org/10.1038/363446a0] [PMID: 8502296]
[http://dx.doi.org/10.1016/j.jconrel.2013.08.298] [PMID: 24035975]
[http://dx.doi.org/10.2147/IJN.S39428] [PMID: 24204148]
[http://dx.doi.org/10.1146/annurev-biochem-063011-092449] [PMID: 23495938]
[PMID: 29511492]
[http://dx.doi.org/10.1158/1535-7163.MCT-13-0896] [PMID: 25253783]
[http://dx.doi.org/10.3109/00365521.2013.865075] [PMID: 24294832]
[http://dx.doi.org/10.1371/journal.pone.0056542] [PMID: 23437163]
[PMID: 35432806]
[http://dx.doi.org/10.1371/journal.pone.0264353] [PMID: 35213635]
[http://dx.doi.org/10.1038/s41598-022-09278-7] [PMID: 35354847]
[http://dx.doi.org/10.1158/2326-6066.CIR-15-0195] [PMID: 27697858]
[http://dx.doi.org/10.4049/jimmunol.1700433] [PMID: 29618524]
[http://dx.doi.org/10.1371/journal.pone.0030422] [PMID: 22276195]
[http://dx.doi.org/10.1038/s41419-018-1047-2] [PMID: 30250191]
[http://dx.doi.org/10.1016/j.cytox.2018.100001]
[http://dx.doi.org/10.1038/nature10975] [PMID: 22446627]
[http://dx.doi.org/10.1182/blood-2002-10-3089] [PMID: 12609842]
[http://dx.doi.org/10.1080/2162402X.2016.1277306] [PMID: 28405498]
[PMID: 19443410]
[http://dx.doi.org/10.1097/00002371-200405000-00005] [PMID: 15076138]
[http://dx.doi.org/10.1016/j.humpath.2003.08.026] [PMID: 14745734]
[http://dx.doi.org/10.1189/jlb.0710422] [PMID: 21248148]
[http://dx.doi.org/10.1038/s41467-019-11782-w] [PMID: 31462678]
[PMID: 8495422]
[http://dx.doi.org/10.1126/scitranslmed.3006221]
[http://dx.doi.org/10.1073/pnas.1002569107] [PMID: 20547866]