Phosphatase and tensin homolog (PTEN) mutation can cause activated phosphatidylinositol 3-kinase δ syndrome–like immunodeficiency  Yuki Tsujita, MD, Kanako.

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Presentation transcript:

Phosphatase and tensin homolog (PTEN) mutation can cause activated phosphatidylinositol 3-kinase δ syndrome–like immunodeficiency  Yuki Tsujita, MD, Kanako Mitsui-Sekinaka, MD, Kohsuke Imai, MD, PhD, Tzu-Wen Yeh, MSc, Noriko Mitsuiki, MD, PhD, Takaki Asano, MD, Hidenori Ohnishi, MD, PhD, Zenichiro Kato, MD, PhD, Yujin Sekinaka, MD, Kiyotaka Zaha, MD, Tamaki Kato, MD, PhD, Tsubasa Okano, MD, Takehiro Takashima, MD, Kaoru Kobayashi, MD, PhD, Mitsuaki Kimura, MD, PhD, Tomoaki Kunitsu, MD, Yoshihiro Maruo, MD, PhD, Hirokazu Kanegane, MD, PhD, Masatoshi Takagi, MD, PhD, Kenichi Yoshida, MD, PhD, Yusuke Okuno, MD, PhD, Hideki Muramatsu, MD, PhD, Yuichi Shiraishi, PhD, Kenichi Chiba, BA, Hiroko Tanaka, BSc, Satoru Miyano, PhD, Seiji Kojima, MD, PhD, Seishi Ogawa, MD, PhD, Osamu Ohara, PhD, Satoshi Okada, MD, PhD, Masao Kobayashi, MD, PhD, Tomohiro Morio, MD, PhD, Shigeaki Nonoyama, MD, PhD  Journal of Allergy and Clinical Immunology  Volume 138, Issue 6, Pages 1672-1680.e10 (December 2016) DOI: 10.1016/j.jaci.2016.03.055 Copyright © 2016 American Academy of Allergy, Asthma & Immunology Terms and Conditions

Journal of Allergy and Clinical Immunology 2016 138, 1672-1680 Journal of Allergy and Clinical Immunology 2016 138, 1672-1680.e10DOI: (10.1016/j.jaci.2016.03.055) Copyright © 2016 American Academy of Allergy, Asthma & Immunology Terms and Conditions

Fig 1 Family tree of patients given a diagnosis of PID. Black boxes and circles represent patients with identified or suspected disease-causing mutations. An identification number has been assigned to each patient (P1-P9). Journal of Allergy and Clinical Immunology 2016 138, 1672-1680.e10DOI: (10.1016/j.jaci.2016.03.055) Copyright © 2016 American Academy of Allergy, Asthma & Immunology Terms and Conditions

Fig 2 PET scanning of P1 and P6 after administration of the glucose analog 18F-fludeoxyglucose. A, Increased glucose uptake was observed in cervical and abdominal lymph nodes and in spleen tissue from P1. B, Increased glucose uptake was observed in cervical, abdominal, and axillary lymph nodes from P6. Journal of Allergy and Clinical Immunology 2016 138, 1672-1680.e10DOI: (10.1016/j.jaci.2016.03.055) Copyright © 2016 American Academy of Allergy, Asthma & Immunology Terms and Conditions

Fig 3 DNA electropherogram of the PTEN gene, PTEN gene expression, and abundance of PTEN protein. A, DNA electropherogram shows the position of the mutation in PTEN (arrow). B, PTEN gene expression in P1 versus a healthy control subject (n = 1; error bars indicate SD of triplicate qPCR data), as normalized to ACTB gene expression levels. C, PTEN and GAPDH expression was measured by using immunoblotting in activated T-cell lysates from patients P1 to P4 and healthy control subjects. Journal of Allergy and Clinical Immunology 2016 138, 1672-1680.e10DOI: (10.1016/j.jaci.2016.03.055) Copyright © 2016 American Academy of Allergy, Asthma & Immunology Terms and Conditions

Fig 4 Hyperphosphorylation of AKT, mTOR, and S6 ribosomal protein in patients and healthy control subjects. A, Immunoblot analysis of AKT phosphorylation at Ser473 (pAKT[S473]), total AKT, S6 ribosomal protein phosphorylated at Ser235 and Ser236 (pS6[S235,236]), and GAPDH (loading control) in activated T cells. B, Multiplex assays of phosphorylation levels of pAKT(S473)/GADPH, pmTOR (S2448)/GADPH, and pS6(S235, S236)/GADPH in activated T cells. Fig 4, A, shows representative data of P1 (PTEN), P5 (PIK3CD E1021K), and P9 (PIK3CD E525A) and their controls (n = 1). In Fig 4, B, Data from patients with PTEN, PIK3CD E1021K, and PIK3CD E525A mutations are shown relative to those from healthy control subjects (n = 3, 2, and 1, respectively). C, Hyperphosphorylation of AKT in patients and healthy control subjects. Phosphorylation of pAKT in B cells in the resting state shown by using Phosflow analysis (red solid lines) and phosphorylation of pAKT in B cells from patients and healthy control subjects treated with p110δ inhibitor (black dotted lines). Journal of Allergy and Clinical Immunology 2016 138, 1672-1680.e10DOI: (10.1016/j.jaci.2016.03.055) Copyright © 2016 American Academy of Allergy, Asthma & Immunology Terms and Conditions

Fig 5 Schematic representation. GOF mutations in PIK3CD favor the conversion of PIP2 to PIP3 and enhance phosphorylation of AKT, mTOR, and S6 proteins. Similarly, loss of PTEN function suppresses the inhibitory function of PI3K, which enhances protein phosphorylation in the AKT/mTOR/S6 pathway. Journal of Allergy and Clinical Immunology 2016 138, 1672-1680.e10DOI: (10.1016/j.jaci.2016.03.055) Copyright © 2016 American Academy of Allergy, Asthma & Immunology Terms and Conditions

Fig E1 Analysis algorithm for whole-exome sequencing data and location of the pathogenic PTEN mutation in P1. A data analysis algorithm was used to filter all single nucleotide variants and insertion-deletion variants. Numbers of variants identified by using exome-wide sequencing are shown for each filtering step. Although variations in 2 other genes (B3GALT2 and PIEZO2) were also annotated by using whole-exome sequencing, they were not considered to be involved in the disease because both were missense variations and the mutated genes were not related to the immune system. SNP, Single nucleotide polymorphism. Journal of Allergy and Clinical Immunology 2016 138, 1672-1680.e10DOI: (10.1016/j.jaci.2016.03.055) Copyright © 2016 American Academy of Allergy, Asthma & Immunology Terms and Conditions

Fig E2 DNA electropherograms of PIK3CD and a structural model of human PI3K. A, Novel mutations in the PIK3CD gene were identified in 3 related patients (P7-P9). DNA electropherograms show the position of the mutation (arrow). B and C, Normal structure (E525) showing interactions between p110δ (blue) and the inter-SH2 (iSH2) and C-terminal SH2 (cSH2) domains of p85α (orange). D, Reported mutation (E525K). E, Novel mutation (E525A). Positive and negative charges are shown with red and blue sticks, respectively. Functional prediction algorithms (SIFT and MutationTaster) indicated that the novel E525A mutation might be deleterious. Moreover, in agreement with a previous report of the E525K mutation,E2 the new PIK3CD (E525A) mutation was associated with a loss of hydrogen bonds between the p85α and p110δ subunits, resulting in decreased binding affinity. In addition, hydrogen bonds in the p110δ molecule were lost, resulting in decreased stability of the peripheral p110δ subunit, as indicated by using protein structure analysis. Mutations of A525 are less likely to affect steric hindrance because of the small size of the p110δ subunit. However, binding affinity is decreased because of the loss of negatively charged residues (Fig E2, E). In contrast, mutations of K525 introduce positive charges that cause repulsive intermolecular forces (Fig E2, D). Thus both p110δ mutations are expected to weaken binding to p85α and contribute to pathogenesis. Journal of Allergy and Clinical Immunology 2016 138, 1672-1680.e10DOI: (10.1016/j.jaci.2016.03.055) Copyright © 2016 American Academy of Allergy, Asthma & Immunology Terms and Conditions

Fig E3 Relative units of phosphorylation for AKT (Ser473), mTOR (Ser2448), and S6 (Ser235 and Ser236) by using multiplex assays of P2-P4 and P6-P8. Journal of Allergy and Clinical Immunology 2016 138, 1672-1680.e10DOI: (10.1016/j.jaci.2016.03.055) Copyright © 2016 American Academy of Allergy, Asthma & Immunology Terms and Conditions

Fig E4 Hyperphosphorylation of AKT in P2-P4, P6-P8 and healthy control subjects. Journal of Allergy and Clinical Immunology 2016 138, 1672-1680.e10DOI: (10.1016/j.jaci.2016.03.055) Copyright © 2016 American Academy of Allergy, Asthma & Immunology Terms and Conditions

Fig E5 Representative flow cytometric analysis of TFH and TrB cells in patients with PIDs. A, Fluorescence-activated cell sorting analysis of CD4+CD3+CD45+CACR5+ TFH cells of patients with PIDs with PIK3CD and PTEN mutations and patients with CVID. B, Representative flow cytometric data of TFH cells in 3 patients of each group. C, Fluorescence-activated cell sorting analysis of CD19+CD24++CD38++ TrB cells of patients with PIDs with PIK3CD and PTEN mutations and control subjects with CVID. D, Representative flow cytometric data of TrB cells in 3 patients of each group. Journal of Allergy and Clinical Immunology 2016 138, 1672-1680.e10DOI: (10.1016/j.jaci.2016.03.055) Copyright © 2016 American Academy of Allergy, Asthma & Immunology Terms and Conditions

Fig E6 Classification of patients given a diagnosis of PID according to TREC/KREC levels. A, Patients were classified as follows: TREC+/KREC+: P1-P4, P7, and P9 and TREC−/KREC+: P5, P6, and P8. B, P7 and P9 were classified as TREC+/KREC+, and P8 was classified as TREC−/KREC+. C, P5 was classified as TREC+/KREC+ as a 5-year-old and as TREC−/KREC+ as an 8-year-old. Journal of Allergy and Clinical Immunology 2016 138, 1672-1680.e10DOI: (10.1016/j.jaci.2016.03.055) Copyright © 2016 American Academy of Allergy, Asthma & Immunology Terms and Conditions