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Association of lactoferrin with specific granules in rabbit heterophil leukocytes

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TLDR
Leukocyte lactoferrin was found to be exclusively localized in the specific (secondary) granules, which have been resolved from other subcellular components by zonal differential centrifugation and by isopycnic equilibration.
Abstract
Lactoferrin has been identified in rabbit heterophil leukocytes on the basis of its immunological reactivity, electrophoretic mobility, acid-resistant iron-binding properties, and spectral characteristics. Leukocyte lactoferrin was found to be exclusively localized in the specific (secondary) granules, which have been resolved from other subcellular components by zonal differential centrifugation and by isopycnic equilibration.

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Targeted Drug Delivery via the Transferrin Receptor-Mediated Endocytosis Pathway

TL;DR: The OX26 monoclonal antibody against the rat transferrin receptor offers great promise in the delivery of therapeutic agents across the blood-brain barrier to the brain and serves as a potential alternative to viral vector for gene therapy.
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The development of neutrophilic polymorphonuclear leukocytes in human bone marrow origin and content of azurophil and specific granules

TL;DR: The findings indicate that the situation is basically the same as described previously in the rabbit, insofar as the origin, enzymic activity, and persistence in the mature cell of the two types of granules are concerned.
Journal ArticleDOI

A bactericidal effect for human lactoferrin

TL;DR: Streptococcus mutans and Vibrio cholerae, but not Escherichia coli, were killed by incubation with purified human apolact oferrin, contingent upon the metal-chelating properties of the lactoferrin molecule.
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Antimicrobial mechanisms in neutrophilic polymorphonuclear leukocytes.

TL;DR: Particular organisms are susceptible to more than one antimicrobial system and thus may be effectively handled by back-up systems when one is absent, and an organism normally killed by the peroxidase system may be handled less efficiently but adequately when MPO is absent by other oxygen-dependent antimicrobial systems.
References
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Journal ArticleDOI

Resolution of granules from rabbit heterophil leukocytes into distinct populations by zonal sedimentation

TL;DR: Postnuclear supernates from homogenates of essentially pure rabbit heterophil leukocytes were fractionated by means of zonal differential centrifugation through a discontinuous sucrose gradient at various speeds and three distinct groups of granules were characterized biochemically and morphologically.
Journal ArticleDOI

Phagocytin: a bactericidal substance from polymorphonuclear leucocytes.

TL;DR: Although phagocytin is reasonably stable at temperatures of 65°C.
Journal ArticleDOI

Electron microscope studies on the degranulation of rabbit peritoneal leukocytes during phagocytosis.

TL;DR: It has been proposed that the release of material to the outside of the cell or the discharge of material into intracellular vacuoles, events involving membrane fusion, be termed "exoplasmosis."
Journal ArticleDOI

Preparation and properties of lactosiderophilin (lactotransferrin) of human milk

TL;DR: In this article, the authors describe a method of isolating and purifying from human milk a mucoid that has, like plasma siderophilin, the ability to bind iron reversibly.
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