کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2051614 1074205 2007 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Characterisation of lipofuscin-like lysosomal inclusion bodies from human placenta
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک دانش گیاه شناسی
پیش نمایش صفحه اول مقاله
Characterisation of lipofuscin-like lysosomal inclusion bodies from human placenta
چکیده انگلیسی

A structural hallmark of lysosomes is heterogeneity of their contents. We describe a method for isolation of particulate materials from human placental lysosomes. After a methionine methyl ester-induced disruption of lysosomes and two density gradient centrifugations we obtained a homogeneous membrane fraction and another one enriched in particulate inclusions. The latter exhibited a yellow-brown coloration and contained bodies lacking a delimiting membrane, which were characterised by a granular pattern and high electron density. The lipofuscin-like inclusion materials were rich in tripeptidyl peptidase I, β-glucuronidase, acid ceramidase and apolipoprotein D and contained proteins originating from diverse subcellular localisations.Here we show that human term placenta contains lipofuscin-like lysosomal inclusions, a phenomenon usually associated with senescence in postmitotic cells. These findings imply that a simple pelleting of a lysosomal lysate is not appropriate for the isolation of lysosomal membranes, as the inclusions tend to be sedimented with the membranes.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: FEBS Letters - Volume 581, Issue 1, 9 January 2007, Pages 102–108
نویسندگان
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