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Signaling Proteins Are Represented in Tissue Fluid/Lymph from Soft Tissues of Normal Human Legs at Concentrations Different from Serum

Identifieur interne : 003157 ( Main/Exploration ); précédent : 003156; suivant : 003158

Signaling Proteins Are Represented in Tissue Fluid/Lymph from Soft Tissues of Normal Human Legs at Concentrations Different from Serum

Auteurs : Marzanna Zaleska ; Waldemar L. Olszewski ; Marek Durlik ; Norman E. Miller

Source :

RBID : PMC:3875199

Descripteurs français

English descriptors

Abstract

Abstract

Background: The mobile intercellular fluid flowing to and in the lymphatics contains filtered plasma products and substances synthesized and excreted by tissue cells. Among them are signaling proteins such as cytokines, chemokines, enzymes, and growth factors. They act locally in autocrine and paracrine systems regulating cell metabolism, proliferation, and formation of the ground matrix. They play an immunoregulatory role in infections, wound healing, and tumor cell growth.

Methods and Results: In this study we measured the concentration of selected cytokines, chemokines, tissue enzymes, and growth factors in tissue fluid/lymph drained from normal human leg soft tissues. Legs exposed to infections and trauma often result in development of lymphedema. Lymph was drained from superficial calf lymphatics using microsurgical techniques. Our studies showed generally higher concentrations of cytokines, chemokines, enzymes, and growth factors in lymph than in serum. The total protein L/S ratio was 0.22, whereas that of various lymph signaling proteins ranged between 1 and 10.

Conclusions: This indicates that in addition to proteins filtered from blood, local cells contribute to lymph concentration by own production, depending on the actual cell requirement. Moreover, there were major individual differences of lymph levels with simultaneous stable serum levels. This suggests existence of a local autonomous regulatory humoral mechanism in tissues, not reflected in serum.


Url:
DOI: 10.1089/lrb.2013.0014
PubMed: 24364843
PubMed Central: 3875199


Affiliations:


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<term>Cytokines (metabolism)</term>
<term>Healthy Volunteers</term>
<term>Humans</term>
<term>Intercellular Signaling Peptides and Proteins (metabolism)</term>
<term>Leg (blood supply)</term>
<term>Lymph (chemistry)</term>
<term>Lymph (metabolism)</term>
<term>Lymphatic Vessels (blood supply)</term>
<term>Lymphatic Vessels (metabolism)</term>
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<term>Matrix Metalloproteinase 9 (metabolism)</term>
<term>Serum</term>
<term>Signal Transduction (physiology)</term>
<term>Tissue Inhibitor of Metalloproteinase-1 (metabolism)</term>
<term>Tissue Inhibitor of Metalloproteinase-2 (metabolism)</term>
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<term>Cytokines (métabolisme)</term>
<term>Humains</term>
<term>Inhibiteur tissulaire de métalloprotéinase-1 (métabolisme)</term>
<term>Inhibiteur tissulaire de métalloprotéinase-2 (métabolisme)</term>
<term>Jambe ()</term>
<term>Lymphe ()</term>
<term>Lymphe (métabolisme)</term>
<term>Matrix metalloproteinase 9 (métabolisme)</term>
<term>Mâle</term>
<term>Protéines et peptides de signalisation intercellulaire (métabolisme)</term>
<term>Sérum</term>
<term>Transduction du signal (physiologie)</term>
<term>Vaisseaux lymphatiques ()</term>
<term>Vaisseaux lymphatiques (métabolisme)</term>
<term>Volontaires sains</term>
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<term>Intercellular Signaling Peptides and Proteins</term>
<term>Matrix Metalloproteinase 9</term>
<term>Tissue Inhibitor of Metalloproteinase-1</term>
<term>Tissue Inhibitor of Metalloproteinase-2</term>
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<term>Lymphatic Vessels</term>
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<term>Lymphatic Vessels</term>
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<term>Inhibiteur tissulaire de métalloprotéinase-1</term>
<term>Inhibiteur tissulaire de métalloprotéinase-2</term>
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<term>Matrix metalloproteinase 9</term>
<term>Protéines et peptides de signalisation intercellulaire</term>
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<italic>Background:</italic>
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The mobile intercellular fluid flowing to and in the lymphatics contains filtered plasma products and substances synthesized and excreted by tissue cells. Among them are signaling proteins such as cytokines, chemokines, enzymes, and growth factors. They act locally in autocrine and paracrine systems regulating cell metabolism, proliferation, and formation of the ground matrix. They play an immunoregulatory role in infections, wound healing, and tumor cell growth.</p>
<p>
<bold>
<italic>Methods and Results:</italic>
</bold>
In this study we measured the concentration of selected cytokines, chemokines, tissue enzymes, and growth factors in tissue fluid/lymph drained from normal human leg soft tissues. Legs exposed to infections and trauma often result in development of lymphedema. Lymph was drained from superficial calf lymphatics using microsurgical techniques. Our studies showed generally higher concentrations of cytokines, chemokines, enzymes, and growth factors in lymph than in serum. The total protein L/S ratio was 0.22, whereas that of various lymph signaling proteins ranged between 1 and 10.</p>
<p>
<bold>
<italic>Conclusions:</italic>
</bold>
This indicates that in addition to proteins filtered from blood, local cells contribute to lymph concentration by own production, depending on the actual cell requirement. Moreover, there were major individual differences of lymph levels with simultaneous stable serum levels. This suggests existence of a local autonomous regulatory humoral mechanism in tissues, not reflected in serum.</p>
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<name sortKey="Olszewski, Waldemar L" sort="Olszewski, Waldemar L" uniqKey="Olszewski W" first="Waldemar L." last="Olszewski">Waldemar L. Olszewski</name>
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