Masakazu Kamata

Stable reduction of CCR5 by RNAi through hematopoietic stem cell transplant in non-human primates (2007)

An, Dong Sung, Donahue, Robert E., Kamata, Masakazu, Poon, Betty, Metzger, Mark, Mao, Si-Hua, ...

RNAi is a powerful method for suppressing gene expression that has tremendous potential for therapeutic applications. However, because endogenous RNAi plays a role in normal cellular functions,...

A Carboxy-Terminally Truncated Form of the Human Immunodeficiency Virus Type 1 Vpr Protein Induces Apoptosis via G1 Cell Cycle Arrest

Nishizawa, Masako, Kamata, Masakazu, Katsumata, Ryoichi, Aida, Yoko

Viral protein R (Vpr) of human immunodeficiency virus type 1 inhibits cell proliferation by arresting the cell cycle at the G2 phase and inducing to apoptosis after G2 arrest. We have reported...

Two Putative α-Helical Domains of Human Immunodeficiency Virus Type 1 Vpr Mediate Nuclear Localization by at Least Two Mechanisms

Kamata, Masakazu, Aida, Yoko

To identify the domains of Vpr that are involved nuclear localization, we transfected HeLa cells with a panel of expression vectors that encode mutant Vpr protein with deletions or substitutions...

Increased Levels of Wee-1 Kinase in G2 Are Necessary for Vpr- and Gamma Irradiation-Induced G2 Arrest

Yuan, Huidong, Kamata, Masakazu, Xie, Yi-Ming, Chen, Irvin S. Y.

Human immunodeficiency virus type 1 (HIV-1) Vpr induces cell cycle arrest at the G2/M transition and subsequently apoptosis. Here we examined the potential involvement of Wee-1 in Vpr-induced G2...

Importin-α Promotes Passage through the Nuclear Pore Complex of Human Immunodeficiency Virus Type 1 Vpr

Kamata, Masakazu, Nitahara-Kasahara, Yuko, Miyamoto, Yoichi, Yoneda, Yoshihiro, Aida, Yoko

Viral protein R (Vpr) of human immunodeficiency virus type 1 has potent karyophilic properties, but details of the mechanism by which it enters the nucleus remain to be clarified. We reported...

A Carboxy-Terminally Truncated Form of the Human Immunodeficiency Virus Type 1 Vpr Protein Induces Apoptosis via G1 Cell Cycle Arrest

Nishizawa, Masako, Kamata, Masakazu, Katsumata, Ryoichi, Aida, Yoko

Viral protein R (Vpr) of human immunodeficiency virus type 1 inhibits cell proliferation by arresting the cell cycle at the G2 phase and inducing to apoptosis after G2 arrest. We have reported...

Two Putative α-Helical Domains of Human Immunodeficiency Virus Type 1 Vpr Mediate Nuclear Localization by at Least Two Mechanisms

Kamata, Masakazu, Aida, Yoko

To identify the domains of Vpr that are involved nuclear localization, we transfected HeLa cells with a panel of expression vectors that encode mutant Vpr protein with deletions or substitutions...

Increased Levels of Wee-1 Kinase in G2 Are Necessary for Vpr- and Gamma Irradiation-Induced G2 Arrest

Yuan, Huidong, Kamata, Masakazu, Xie, Yi-Ming, Chen, Irvin S. Y.

Human immunodeficiency virus type 1 (HIV-1) Vpr induces cell cycle arrest at the G2/M transition and subsequently apoptosis. Here we examined the potential involvement of Wee-1 in Vpr-induced G2...

Importin-α Promotes Passage through the Nuclear Pore Complex of Human Immunodeficiency Virus Type 1 Vpr

Kamata, Masakazu, Nitahara-Kasahara, Yuko, Miyamoto, Yoichi, Yoneda, Yoshihiro, Aida, Yoko

Viral protein R (Vpr) of human immunodeficiency virus type 1 has potent karyophilic properties, but details of the mechanism by which it enters the nucleus remain to be clarified. We reported...

Novel Nuclear Import of Vpr Promoted by Importin α Is Crucial for Human Immunodeficiency Virus Type 1 Replication in Macrophages▿

Nitahara-Kasahara, Yuko, Kamata, Masakazu, Yamamoto, Takuya, Zhang, Xianfeng, Miyamoto, Yoichi, Muneta, Koho, ...

Monocytes/macrophages are major targets of human immunodeficiency virus type 1 (HIV-1) infection. The viral preintegration complex (PIC) of HIV-1 enters the nuclei of monocyte-derived macrophages,...

Stable reduction of CCR5 by RNAi through hematopoietic stem cell transplant in non-human primates

An, Dong Sung, Donahue, Robert E., Kamata, Masakazu, Poon, Betty, Metzger, Mark, Mao, Si-Hua, ...

RNAi is a powerful method for suppressing gene expression that has tremendous potential for therapeutic applications. However, because endogenous RNAi plays a role in normal cellular functions,...

Human Immunodeficiency Virus Type 1 Vpr Binds to the N Lobe of the Wee1 Kinase Domain and Enhances Kinase Activity for Cdc2▿

Kamata, Masakazu, Watanabe, Nobumoto, Nagaoka, Yoshiko, Chen, Irvin S. Y.

Human immunodeficiency virus type 1 Vpr is a virion-associated accessory protein that has multiple activities within an infected cell. One of the most dramatic effects of Vpr is the induction of cell...