Volume 11, Pages (January 2019)

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Volume 11, Pages 466-473 (January 2019) IFNG-AS1 Enhances Interferon Gamma Production in Human Natural Killer Cells  Natan Stein, Orit Berhani, Dominik Schmiedel, Alexandra Duev-Cohen, Einat Seidel, Inbal Kol, Pinchas Tsukerman, Merav Hecht, Adi Reches, Moriya Gamliel, Akram Obeidat, Yoav Charpak-Amikam, Rachel Yamin, Ofer Mandelboim  iScience  Volume 11, Pages 466-473 (January 2019) DOI: 10.1016/j.isci.2018.12.034 Copyright © 2019 The Authors Terms and Conditions

iScience 2019 11, 466-473DOI: (10.1016/j.isci.2018.12.034) Copyright © 2019 The Authors Terms and Conditions

Figure 1 IFNG-AS1 Is Expressed in Human NK Cells (A) PCR demonstrating expression of IFNG-AS1 in bulk (activated) NK and CD4+ T cells derived from healthy donors, as well as NK and T cell lines (YTS and Jurkat, respectively). Water (DDW) was used as a negative control. (B) IFNG-AS1 expression in NK cells derived from seven different healthy donors. (A) and (B) were performed simultaneously, with the same negative control (DDW). (C) Quantitative PCR (qPCR) of IFNG-AS1 expression in NK and CD4+ cells derived from healthy donors, as well as NK and T cell lines (YTS and Jurkat, respectively). The non-hematopoetic cell line RKO and the non-human cell line BW are negative controls. Representative of at least two independent experiments. All graphs are shown as mean ± standard error of the mean. (D) Fluorescence in situ hybridization (FISH) targeting IFNG-AS1 in the indicated cell types. DAPI is used as a counterstain. Scale bars shown are for a given row of images. (E and F) NK cells derived from healthy donors were incubated in the presence of cycloheximide (CHX) for the indicated times. Expression levels of (E) IFNG and (F) IFNG-AS1 are shown. Representative of at least three independent experiments. (G–I) NK cells derived from healthy donors were incubated in the presence of the indicated cytokines for the indicated times. Expression levels of (G) IFNG-AS1 and (H) IFNG are shown. Given its exponential rise, the log10 value of IFNG expression is shown. Protein secretion at 6 h is shown in (I). Representative of at least two independent experiments. n.d., not detected; OE, overexpression. iScience 2019 11, 466-473DOI: (10.1016/j.isci.2018.12.034) Copyright © 2019 The Authors Terms and Conditions

Figure 2 NK Cells Express a Novel Sequence of IFNG-AS1 (A) Publicly available databases contain two transcript variants of IFNG-AS1, which differ in the presence of exon 4. The literature, however, references a sixth exon. 3′ RACE on cDNA derived from NKs from three distinct human donors found transcript variant 2 (absence of exon 4) and a previously unannotated length of exon 5, but no evidence of a sixth exon. (B) The sequence of IFNG-AS1 in NK cells. Nucleotides in green are not found in publicly available databases. iScience 2019 11, 466-473DOI: (10.1016/j.isci.2018.12.034) Copyright © 2019 The Authors Terms and Conditions

Figure 3 IFNG-AS1 Induction in Activated Human NK Cells (A–C) NK cells were incubated in plates pre-bound with the indicated antibodies for the indicated times. Expression levels of (A) IFNG-AS1 and (B) IFNG are shown, as determined by qPCR. IFNγ secretion after 24 h is shown in (C). Representative of three independent experiments. (D–G) NK cells were incubated with the indicated cells for the indicated times. Expression levels of (D and F) IFNG-AS1 and (E and G) IFNG are shown. The cell line used is shown to the left of each row of graphs. Representative of at least three independent experiments. (H and I) IFNγ secretion by NKs incubated with the indicated cells for 5 h. Representative of at least three independent experiments. OE, overexpression. *p < 0.05, **p < 0.005, ***p < 0.0005 as compared to the the untreated and isotype/ wild-type samples of the given timepoint. iScience 2019 11, 466-473DOI: (10.1016/j.isci.2018.12.034) Copyright © 2019 The Authors Terms and Conditions

Figure 4 Induction of IFNγ in IFNG-AS1 Overexpression (A) Expression of IFNG-AS1 in parental YTS cells and YTS cells transfected with empty vector or IFNG-AS1. Representative of five independent experiments. (B) Peak IFNG expression as measured by qPCR at several time points with the indicated treatments. Expression is normalized to an independent sample of untreated parental YTS cells. Representative of at least three independent experiments. (C) IFNγ secretion after 24 h of a variety of activating treatments, as measured by ELISA. Representative of at least three independent experiments. EV, empty vector; OE, overexpression. *p < 0.05, **p < 0.005, ***p < 0.0005. iScience 2019 11, 466-473DOI: (10.1016/j.isci.2018.12.034) Copyright © 2019 The Authors Terms and Conditions