Ken J. Ishii

Pathological role of Toll-like receptor signaling in cerebral malaria (2007)

Coban, Cevayir, Ishii, Ken J., Uematsu, Satoshi, Arisue, Nobuko, Sato, Shintaro, Yamamoto, Masahiro, ...

Toll-like receptors (TLRs) recognize malaria parasites or their metabolites; however, their physiological roles in malaria infection in vivo are not fully understood. Here, we show that myeloid...

Activation of target-tissue immune-recognition molecules by double-stranded polynucleotides

Suzuki, Koichi, Mori, Atsumi, Ishii, Ken J., Saito, Jun, Singer, Dinah S., Klinman, Dennis M., ...

Abnormal expression of major histocompatibility complex (MHC) class I and class II in various tissues is associated with autoimmune disease. Autoimmune responses can be triggered by viral infections...

Purified Malaria Pigment (Hemozoin) Enhances Dendritic Cell Maturation and Modulates the Isotype of Antibodies Induced by a DNA Vaccine

Coban, Cevayir, Ishii, Ken J., Sullivan, David J., Kumar, Nirbhay

Hemozoin (malaria pigment) has been implicated in the modulation of immune responses during malaria infection. This study was designed to evaluate the effect of purified hemozoin on the in vitro...

Effect of CpG Oligodeoxynucleotides on the Immunogenicity of Pfs25, a Plasmodium falciparum Transmission-Blocking Vaccine Antigen

Coban, Cevayir, Ishii, Ken J., Stowers, Anthony W., Keister, David B., Klinman, Dennis M., Kumar, Nirbhay

Antibodies directed against Pfs25, a protein present on the surface of zygotes and ookinetes of Plasmodium falciparum, completely block pathogen transmission. We evaluated the immunomodulatory effect...

CpG Oligodeoxynucleotides Improve the Survival of Pregnant and Fetal Mice following Listeria monocytogenes Infection

Ito, Shu-ichi, Ishii, Ken J., Shirota, Hidekazu, Klinman, Dennis M.

Listeria infection during pregnancy can cause the death of both mother and fetus. Previous studies established that immunostimulatory CpG oligodeoxynucleotides (ODN) increase the resistance of...

Contribution of Nitric Oxide to CpG-Mediated Protection against Listeria monocytogenes

Ito, Shuichi, Ishii, Ken J., Ihata, Atsushi, Klinman, Dennis M.

Immunostimulatory CpG oligodeoxynucleotides (ODN) improve host resistance to listeriae. CpG ODN trigger immune cells to produce gamma interferon and “prime” host cells to secrete nitric oxide in...

Toll-Like Receptor Adaptor Molecules Enhance DNA-Raised Adaptive Immune Responses against Influenza and Tumors through Activation of Innate Immunity

Takeshita, Fumihiko, Tanaka, Toshiyuki, Matsuda, Tomoko, Tozuka, Miyuki, Kobiyama, Kouji, Saha, Sukumar, ...

Toll-like receptors (TLRs) recognize microbial components and trigger the signaling cascade that activates the innate and adaptive immunity. TLR adaptor molecules play a central role in this cascade;...

Activation of target-tissue immune-recognition molecules by double-stranded polynucleotides

Suzuki, Koichi, Mori, Atsumi, Ishii, Ken J., Saito, Jun, Singer, Dinah S., Klinman, Dennis M., ...

Abnormal expression of major histocompatibility complex (MHC) class I and class II in various tissues is associated with autoimmune disease. Autoimmune responses can be triggered by viral infections...

Purified Malaria Pigment (Hemozoin) Enhances Dendritic Cell Maturation and Modulates the Isotype of Antibodies Induced by a DNA Vaccine

Coban, Cevayir, Ishii, Ken J., Sullivan, David J., Kumar, Nirbhay

Hemozoin (malaria pigment) has been implicated in the modulation of immune responses during malaria infection. This study was designed to evaluate the effect of purified hemozoin on the in vitro...

Effect of CpG Oligodeoxynucleotides on the Immunogenicity of Pfs25, a Plasmodium falciparum Transmission-Blocking Vaccine Antigen

Coban, Cevayir, Ishii, Ken J., Stowers, Anthony W., Keister, David B., Klinman, Dennis M., Kumar, Nirbhay

Antibodies directed against Pfs25, a protein present on the surface of zygotes and ookinetes of Plasmodium falciparum, completely block pathogen transmission. We evaluated the immunomodulatory effect...

CpG Oligodeoxynucleotides Improve the Survival of Pregnant and Fetal Mice following Listeria monocytogenes Infection

Ito, Shu-ichi, Ishii, Ken J., Shirota, Hidekazu, Klinman, Dennis M.

Listeria infection during pregnancy can cause the death of both mother and fetus. Previous studies established that immunostimulatory CpG oligodeoxynucleotides (ODN) increase the resistance of...

Contribution of Nitric Oxide to CpG-Mediated Protection against Listeria monocytogenes

Ito, Shuichi, Ishii, Ken J., Ihata, Atsushi, Klinman, Dennis M.

Immunostimulatory CpG oligodeoxynucleotides (ODN) improve host resistance to listeriae. CpG ODN trigger immune cells to produce gamma interferon and “prime” host cells to secrete nitric oxide in...

Toll-Like Receptor Adaptor Molecules Enhance DNA-Raised Adaptive Immune Responses against Influenza and Tumors through Activation of Innate Immunity

Takeshita, Fumihiko, Tanaka, Toshiyuki, Matsuda, Tomoko, Tozuka, Miyuki, Kobiyama, Kouji, Saha, Sukumar, ...

Toll-like receptors (TLRs) recognize microbial components and trigger the signaling cascade that activates the innate and adaptive immunity. TLR adaptor molecules play a central role in this cascade;...

Contribution of interferon-β to the immune activation induced by double-stranded DNA

Shirota, Hidekazu, Ishii, Ken J, Takakuwa, Hiroki, Klinman, Dennis M

Introducing double-stranded DNA (dsDNA) into the cytoplasm of macrophages and dendritic cells triggers the activation of these professional antigen-presenting cells (APCs). This process is...

Essential role of IPS-1 in innate immune responses against RNA viruses

Kumar, Himanshu, Kawai, Taro, Kato, Hiroki, Sato, Shintaro, Takahashi, Ken, Coban, Cevayir, ...

IFN-β promoter stimulator (IPS)-1 was recently identified as an adapter for retinoic acid–inducible gene I (RIG-I) and melanoma differentiation-associated gene 5 (Mda5), which recognize distinct...

The Atg5–Atg12 conjugate associates with innate antiviral immune responses

Jounai, Nao, Takeshita, Fumihiko, Kobiyama, Kouji, Sawano, Asako, Miyawaki, Atsushi, Xin, Ke-Qin, ...

Autophagy is an essential process for physiological homeostasis, but its role in viral infection is only beginning to be elucidated. We show here that the Atg5–Atg12 conjugate, a key regulator of...

Enhanced TLR-mediated NF-IL6–dependent gene expression by Trib1 deficiency

Yamamoto, Masahiro, Uematsu, Satoshi, Okamoto, Toru, Matsuura, Yoshiharu, Sato, Shintaro, Kumar, Himanshu, ...

Toll-like receptors (TLRs) recognize a variety of microbial components and mediate downstream signal transduction pathways that culminate in the activation of nuclear factor κB (NF-κB) and...

Toll-like receptor 9 mediates innate immune activation by the malaria pigment hemozoin

Coban, Cevayir, Ishii, Ken J., Kawai, Taro, Hemmi, Hiroaki, Sato, Shintaro, Uematsu, Satoshi, ...

Malaria parasites within red blood cells digest host hemoglobin into a hydrophobic heme polymer, known as hemozoin (HZ), which is subsequently released into the blood stream and then captured by and...

Interleukin-1 receptor-associated kinase-1 plays an essential role for Toll-like receptor (TLR)7- and TLR9-mediated interferon-α induction

Uematsu, Satoshi, Sato, Shintaro, Yamamoto, Masahiro, Hirotani, Tomonori, Kato, Hiroki, Takeshita, Fumihiko, ...

Toll-like receptors (TLRs) recognize microbial pathogens and trigger innate immune responses. Among TLR family members, TLR7, TLR8, and TLR9 induce interferon (IFN)-α in plasmacytoid dendritic cells...

Potential Role of Phosphatidylinositol 3 Kinase, rather than DNA-dependent Protein Kinase, in CpG DNA–induced Immune Activation

Ishii, Ken J., Takeshita, Fumihiko, Gursel, Ihsan, Gursel, Mayda, Conover, Jacqueline, Nussenzweig, Andre, ...

Unmethylated CpG motifs present in bacterial DNA stimulate a strong innate immune response. There is evidence that DNA-dependent protein kinase (DNA-PK) mediates CpG signaling. Specifically,...