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Iron / infection

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General fitness, health and nutrition
Published
9 November 2004
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10 November 2004
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doe
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  1. Nature. 2004 Nov 7 [Epub ahead of print] Links

    Lipocalin 2 mediates an innate immune response to bacterial infection by
    sequestrating iron.

    Flo TH, Smith KD, Sato S, Rodriguez DJ, Holmes MA, Strong RK, Akira S, Aderem
    A.

    [1] Institute for Systems Biology, Seattle, Washington 98103, USA [2] Institute
    for Cancer Research and Molecular Medicine, Norwegian University of Science and
    Technology, 7489 Trondheim, Norway [3] These authors contributed equally to
    this work.

    Although iron is required to sustain life, its free concentration and
    metabolism have to be tightly regulated. This is achieved through a variety of
    iron-binding proteins including transferrin and ferritin. During infection,
    bacteria acquire much of their iron from the host by synthesizing siderophores
    that scavenge iron and transport it into the pathogen. We recently demonstrated
    that enterochelin, a bacterial catecholate siderophore, binds to the host
    protein lipocalin 2 (ref. 5). Here, we show that this event is pivotal in the
    innate immune response to bacterial infection. Upon encountering invading
    bacteria the Toll-like receptors on immune cells stimulate the transcription,
    translation and secretion of lipocalin 2; secreted lipocalin 2 then limits
    bacterial growth by sequestrating the iron-laden siderophore. Our finding
    represents a new component of the innate immune system and the acute phase
    response to infection.

    PMID: 15531878 [PubMed - as supplied by publisher]

    --------------------------------------------------------------------------
    ------

    Who loves ya.
    Tom
    Jesus Was A Vegetarian! http://jesuswasavegetarian.7h.com
    Man Is A Herbivore! http://pages.ivillage.com/ironjustice/manisaherbivore
    DEAD PEOPLE WALKING http://pages.ivillage.com/ironjustice/deadpeoplewalking

  2. "Although iron is required to sustain life, its free concentration and
    metabolism have to be tightly regulated. This is achieved through a
    variety of
    iron-binding proteins including transferrin and ferritin."

    Contridicts core of iron causes all disease thesis,ie. iron is not
    controled and we must avoid consuming it and use methods to reduce it.

  3. Quoted message said:

    Subject: Re: Iron / infection
    From: [email hidden]
    Date: 11/9/2004 8:27 AM Mountain Standard Time
    Message-id: <[email hidden]>

    "Although iron is required to sustain life, its free concentration and
    metabolism have to be tightly regulated. This is achieved through a
    variety of
    iron-binding proteins including transferrin and ferritin."

    Contridicts core of iron causes all disease thesis,ie. iron is not
    controled and we must avoid consuming it and use methods to reduce it.

    Comments from .. markd . noted .. and filed ..

    Nature. 2004 Nov 7 [Epub ahead of print] Links

    Lipocalin 2 mediates an innate immune response to bacterial infection by
    sequestrating iron.

    Flo TH, Smith KD, Sato S, Rodriguez DJ, Holmes MA, Strong RK, Akira S, Aderem
    A.

    [1] Institute for Systems Biology, Seattle, Washington 98103, USA [2] Institute
    for Cancer Research and Molecular Medicine, Norwegian University of Science and
    Technology, 7489 Trondheim, Norway [3] These authors contributed equally to
    this work.

    Although iron is required to sustain life, its free concentration and
    metabolism have to be tightly regulated. This is achieved through a variety of
    iron-binding proteins including transferrin and ferritin. During infection,
    bacteria acquire much of their iron from the host by synthesizing siderophores
    that scavenge iron and transport it into the pathogen. We recently demonstrated
    that enterochelin, a bacterial catecholate siderophore, binds to the host
    protein lipocalin 2 (ref. 5). Here, we show that this event is pivotal in the
    innate immune response to bacterial infection. Upon encountering invading
    bacteria the Toll-like receptors on immune cells stimulate the transcription,
    translation and secretion of lipocalin 2; secreted lipocalin 2 then limits
    bacterial growth by sequestrating the iron-laden siderophore. Our finding
    represents a new component of the innate immune system and the acute phase
    response to infection.

    PMID: 15531878 [PubMed - as supplied by publisher]

    --------------------------------------------------------------------------
    ------

    Who loves ya.
    Tom
    Jesus Was A Vegetarian! http://jesuswasavegetarian.7h.com
    Man Is A Herbivore! http://pages.ivillage.com/ironjustice/manisaherbivore
    DEAD PEOPLE WALKING http://pages.ivillage.com/ironjustice/deadpeoplewalking

  4. Several contridictions to iron thesis have been presented by it's inventer
    himself. How many contridictions constitute a case of the thesis having
    failed? How does one know if the iron thesis is a failure, what info do
    we need and what would it have to look like to accept it as the final nail
    in the thesis coffin?

  5. Quoted message said:

    Subject: Re: Iron / infection
    From: [email hidden]
    Date: 11/10/2004 7:01 AM Mountain Standard Time
    Message-id: <[email hidden]>

    Several contridictions to iron thesis have been presented by it's inventer
    himself. How many contridictions constitute a case of the thesis having
    failed? How does one know if the iron thesis is a failure, what info do
    we need and what would it have to look like to accept it as the final nail
    in the thesis coffin?

    The SHEER NUMBER of researchers investigating the implications of iron .. rules
    out .. YOU .. in .. the hypothesis ..

    As if YOU .. are going to go it .. alone .. ?

    Heh .. heh ...

    Nature. 2004 Nov 7 [Epub ahead of print] Links

    Lipocalin 2 mediates an innate immune response to bacterial infection by
    sequestrating iron.

    Flo TH, Smith KD, Sato S, Rodriguez DJ, Holmes MA, Strong RK, Akira S, Aderem
    A.

    [1] Institute for Systems Biology, Seattle, Washington 98103, USA [2] Institute
    for Cancer Research and Molecular Medicine, Norwegian University of Science and
    Technology, 7489 Trondheim, Norway [3] These authors contributed equally to
    this work.

    Although iron is required to sustain life, its free concentration and
    metabolism have to be tightly regulated. This is achieved through a variety of
    iron-binding proteins including transferrin and ferritin. During infection,
    bacteria acquire much of their iron from the host by synthesizing siderophores
    that scavenge iron and transport it into the pathogen. We recently demonstrated
    that enterochelin, a bacterial catecholate siderophore, binds to the host
    protein lipocalin 2 (ref. 5). Here, we show that this event is pivotal in the
    innate immune response to bacterial infection. Upon encountering invading
    bacteria the Toll-like receptors on immune cells stimulate the transcription,
    translation and secretion of lipocalin 2; secreted lipocalin 2 then limits
    bacterial growth by sequestrating the iron-laden siderophore. Our finding
    represents a new component of the innate immune system and the acute phase
    response to infection.

    PMID: 15531878 [PubMed - as supplied by publisher]

    --------------------------------------------------------------------------
    ------

    Who loves ya.
    Tom
    Jesus Was A Vegetarian! http://jesuswasavegetarian.7h.com
    Man Is A Herbivore! http://pages.ivillage.com/ironjustice/manisaherbivore
    DEAD PEOPLE WALKING http://pages.ivillage.com/ironjustice/deadpeoplewalking

  6. "The SHEER NUMBER of researchers investigating the implications of iron ..
    rules
    out .. YOU .. in .. the hypothesis .."

    This has always been clear, a confusion that because others are looking at
    all aspects of biochem in humans that any mention of iron is a mark of
    some support for your invented thesis,ie. that iron is the cause for all
    disease. At best this is a confusion about how science works, at worst,
    well ... There is no where in all the reams of articles you have posted
    is there even the mere wisper that anyone, anyone in the whole worlds
    knows about or cares about your invented thesis about iron. If you think
    this is in error, submit it for publication, or just maybe you have and
    the results will never be disclosed? You avoid the question, how many
    articles to the contrary and how many instances of you posting yourself
    contridictions to your own thesis will constitute clear basis for
    rejecting it? This is not an empty question, it is at the heart of how
    science is done, and you should be prepared to answerit.

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