Abstract：
:Hepatic peroxisomes in human embryos with a menstrual age of 6 and 7 weeks have been examined via catalase cytochemistry. In the younger sample, the organelles show no catalase activity, their matrix being pale and coarsely reticular. In the 7-week specimen, the peroxisome population consists of catalase-positive and catalase-negative organelles. The latter have a morphology identical to that of the 6-week sample and represent 66% of the population. The positive organelles show a pronounced staining heterogeneity. Together with the simultaneous presence of negative organelles, this might reflect the onset of catalase import into the peroxisomes during this period. Catalase heterogeneity excludes a continuous exchange of matrix contents; moreover, interconnections between peroxisomes have not been observed, and no cluster formation occurs. The data therefore also suggest that catalase is imported into individual, preexisting organelles in embryonic liver. The three peroxisomal beta-oxidation enzymes become detectable by immunocytochemistry only later during development. Morphological indications for a rapidly dividing population, such as elongated and/or tailed organelles, have not been observed. Morphometry has revealed that, in these early stages, the organelles are significantly smaller than the peroxisomes of fetal and adult human liver.
journal_name
Cell Tissue Resjournal_title
Cell and tissue researchauthors
Espeel M,Brière N,De Craemer D,Jauniaux E,Roels Fdoi
10.1007/BF00323574subject
Has Abstractpub_date
1993-04-01 00:00:00pages
89-92issue
1eissn
0302-766Xissn
1432-0878journal_volume
272pub_type
杂志文章abstract：:Bone resorption by mononucleated cells was studied in the acellular bone of a teleost fish (Oreochromis niloticus) by histological and enzyme histochemical observations and by transmission electron microscopy. Bone resorbing cells (osteoclasts) were identified by their location at the sites of bone resorption, their f...
journal_title：Cell and tissue research
pub_type： 杂志文章
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journal_title：Cell and tissue research
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journal_title：Cell and tissue research
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journal_title：Cell and tissue research
pub_type： 杂志文章
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journal_title：Cell and tissue research
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journal_title：Cell and tissue research
pub_type： 杂志文章
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更新日期：1981-01-01 00:00:00
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更新日期：2012-04-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
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更新日期：1994-09-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
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更新日期：1996-06-01 00:00:00
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pub_type： 杂志文章
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更新日期：2013-03-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00213851
更新日期：1982-01-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
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更新日期：2000-04-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/s004410051174
更新日期：1998-11-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章,评审
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更新日期：2012-05-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
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更新日期：1982-01-01 00:00:00
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journal_title：Cell and tissue research
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更新日期：1994-05-01 00:00:00
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pub_type： 杂志文章
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更新日期：1979-12-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
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更新日期：1992-08-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
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更新日期：1983-01-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
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更新日期：1976-05-06 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
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更新日期：1979-08-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章,评审
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更新日期：2021-01-30 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00233613
更新日期：1980-01-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/s004410050986
更新日期：1998-01-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
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更新日期：2015-09-01 00:00:00
