Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2019 Apr 24;10:879. doi: 10.3389/fimmu.2019.00879

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

Copyright © 2019 Kweon, Phan, Chun, Yu, Kim, Kim, Lee, Ali, Lee, Kim, Doh and Cho.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

PMC Copyright notice

Irradiated K562-OX40L with short exposure to different concentration of IL-21 results in pronounced expansion of NK cells for 5 weeks. PBMCs were co-cultured with γ-irradiated K562 (red) or K562-OX40L (green) with 10 U/mL of IL2 and 5 ng/ml (A), 50 ng/ml (B), 100 ng/ml (C) of IL-21 at day 0 and re-stimulated at day 7, 14 with 100 U/mL of IL-2 and 5 ng/mL of IL-15. The medium was replaced every 2–3 days. (D) Each of IL-21 added groups was combined and compared within K562 and K562-OX40L groups (K562, n = 7; and K562-OX40L, n = 10; error bars, mean ± SD; *p < 0.05; **p < 0.01; ***p < 0.001).