19 research outputs found

    U.S. Military Presence in the Persian Gulf: Challenges and Prospects

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    The author considers the critical questions of U.S. military presence in the Gulf, the challenges it faces, and the prospects that lay ahead. He relies, in his presentation and analysis, on a variety of regional sources including newspaper reports and personal interviews conducted in the United States and the Gulf region, as well as government and academic sources. The result is a comprehensive study, including policy recommendations for U.S. military and civilian decisionmakers that makes intelligible the complex subject of U.S.-Gulf relations.https://press.armywarcollege.edu/monographs/1826/thumbnail.jp

    Security Implications of the Proliferation of Weapons of Mass Destruction in the Middle East

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    This monograph addresses the important question of the security implications for the nations of the region of the proliferation of weapons of mass destruction in the Middle East. The Strategic Studies Institute is pleased to offer the monograph as a contribution to the national security debate on this important issue. The author offers a unique perspective based on extensive interviews that he conducted in the region, and makes specific policy recommendations for U.S. military and civilian decisionmakers.https://press.armywarcollege.edu/monographs/1851/thumbnail.jp

    Hizballah: Terrorism, National Liberation, or Menace?

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    The author reviews the history of Hizballah since its inception in 1982, and examines its role in the recent political turmoil of Lebanon and the region. Not only is Hizballah\u27s role central in the dispute over the Sheb\u27a Farms enclave between Lebanon and Israel, it is part of an entangled set of linkages involving Syria, Iran, the United States, the European Union, and the Palestinians. The challenge that Hizballah poses to U.S. policy in the Middle East involves complicated strategic issues, not merely problems of terrorism that could be dealt with by countermeasures.https://press.armywarcollege.edu/monographs/1818/thumbnail.jp

    Spread, circulation, and evolution of the Middle East respiratory syndrome coronavirus

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    The Middle East respiratory syndrome coronavirus (MERS-CoV) was first documented in the Kingdom of Saudi Arabia (KSA) in 2012 and, to date, has been identified in 180 cases with 43% mortality. In this study, we have determined the MERS-CoV evolutionary rate, documented genetic variants of the virus and their distribution throughout the Arabian peninsula, and identified the genome positions under positive selection, important features for monitoring adaptation of MERS-CoV to human transmission and for identifying the source of infections. Respiratory samples from confirmed KSA MERS cases from May to September 2013 were subjected to whole-genome deep sequencing, and 32 complete or partial sequences (20 were ≥99% complete, 7 were 50 to 94% complete, and 5 were 27 to 50% complete) were obtained, bringing the total available MERS-CoV genomic sequences to 65. An evolutionary rate of 1.12 × 10−3 substitutions per site per year (95% credible interval [95% CI], 8.76 × 10−4; 1.37 × 10−3) was estimated, bringing the time to most recent common ancestor to March 2012 (95% CI, December 2011; June 2012). Only one MERS-CoV codon, spike 1020, located in a domain required for cell entry, is under strong positive selection. Four KSA MERS-CoV phylogenetic clades were found, with 3 clades apparently no longer contributing to current cases. The size of the population infected with MERS-CoV showed a gradual increase to June 2013, followed by a decline, possibly due to increased surveillance and infection control measures combined with a basic reproduction number (R0) for the virus that is less than 1

    B cell–intrinsic signaling through IL-21 receptor and STAT3 is required for establishing long-lived antibody responses in humans

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    Engagement of cytokine receptors by specific ligands activate Janus kinase–signal transducer and activator of transcription (STAT) signaling pathways. The exact roles of STATs in human lymphocyte behavior remain incompletely defined. Interleukin (IL)-21 activates STAT1 and STAT3 and has emerged as a potent regulator of B cell differentiation. We have studied patients with inactivating mutations in STAT1 or STAT3 to dissect their contribution to B cell function in vivo and in response to IL-21 in vitro. STAT3 mutations dramatically reduced the number of functional, antigen (Ag)-specific memory B cells and abolished the ability of IL-21 to induce naive B cells to differentiate into plasma cells (PCs). This resulted from impaired activation of the molecular machinery required for PC generation. In contrast, STAT1 deficiency had no effect on memory B cell formation in vivo or IL-21–induced immunoglobulin secretion in vitro. Thus, STAT3 plays a critical role in generating effector B cells from naive precursors in humans. STAT3-activating cytokines such as IL-21 thus underpin Ag-specific humoral immune responses and provide a mechanism for the functional antibody deficit in STAT3-deficient patients

    Characterization of greater middle eastern genetic variation for enhanced disease gene discovery

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    The Greater Middle East (GME) has been a central hub of human migration and population admixture. The tradition of consanguinity, variably practiced in the Persian Gulf region, North Africa, and Central Asia1-3, has resulted in an elevated burden of recessive disease4. Here we generated a whole-exome GME variome from 1,111 unrelated subjects. We detected substantial diversity and admixture in continental and subregional populations, corresponding to several ancient founder populations with little evidence of bottlenecks. Measured consanguinity rates were an order of magnitude above those in other sampled populations, and the GME population exhibited an increased burden of runs of homozygosity (ROHs) but showed no evidence for reduced burden of deleterious variation due to classically theorized ‘genetic purging’. Applying this database to unsolved recessive conditions in the GME population reduced the number of potential disease-causing variants by four- to sevenfold. These results show variegated genetic architecture in GME populations and support future human genetic discoveries in Mendelian and population genetics

    Strategic Insights: The U.S. Foray Into The Levant

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    U.S. military presence in the Gulf : challenges and prospects /

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    "March 2002."Includes bibliographical references (p. 59-75).Mode of access: Internet

    Security implications of the proliferation of weapons of mass destruction in the Middle East /

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    "December 17, 1998."Includes bibliographical references (p. 41-53).Mode of access: Internet
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