Abstract:
:Keratinocytes, in response to irritants, secrete pro-inflammatory mediators which recruit and activate immune and mesenchymal cells, including fibroblasts, to repair the skin. Fibroblasts respond by synthesising collagen and promoting the crosslinking extracellular matrix (ECM). We recently showed that the deletion of Rac1 in keratinocytes causes heightened inflammation due to aberrant crosstalk with immune cells. Indeed, the skin of these mice shows a higher inflammatory response to the induction of irritant contact dermatitis (ICD), and also even to treatment with a vehicle alone, compared with controls. As inflammation is intimately linked with fibrotic disease in the skin, this raised the question as to whether this deletion may also affect the deposition and arrangement of the dermal ECM. This study assessed the effects of Rac1 deletion in keratinocytes and of the heightened inflammatory status by induction of ICD on the tissue localisation and arrangements of dermal collagen. Qualitative analysis did not reveal evidence for the formation of pathologies in the dermis. However, quantitative analysis did reveal some perturbations in the dermal matrix, namely that only the combination of the lack of Rac1 and ICD affects the architectural organisation of the dermal collagen, and that a higher inflammatory state in the tissue (i.e. when Rac1 is deleted in the keratinocytes or ICD is induced in the skin, or a combination of both) influences the diameter of the collagen fibrils. It is proposed that this increase in the diameter of collagen fibrils due to inflammation may serve as pre-fibrotic marker enabling earlier determination of fibrosis and earlier treatment. This study has revealed previously unknown effects on the ECM due to the deletion of Rac1 in keratinocytes.
journal_name
J Anatjournal_title
Journal of anatomyauthors
Stanley A,Pedersen E,Brakebusch C,Quondamatteo Fdoi
10.1111/joa.12442subject
Has Abstractpub_date
2016-05-01 00:00:00pages
826-37issue
5eissn
0021-8782issn
1469-7580journal_volume
228pub_type
杂志文章abstract::The spatiotemporal distribution of macrophages in the uterine wall of mice in the second half of pregnancy and the early postpartum period has been studied. Macrophages were identified using a combination of morphological criteria, the capacity to endocytose horseradish peroxidase and the expression of the Mac-1 antig...
journal_title:Journal of anatomy
pub_type: 杂志文章
doi:
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abstract::To evaluate whether the lines occasionally detected on clinical magnetic resonance (MR) images are genuine hippocampal layers, a formalin fixed hippocampal specimen was scanned using T2 weighted sequences at 7 Tesla (voxel dimensions 0.064 x 0.064 x 1 mm) and at 1.5 Tesla (voxel dimensions: 0.156 x 0.156 x 1 mm) and c...
journal_title:Journal of anatomy
pub_type: 杂志文章
doi:10.1046/j.1469-7580.1999.19510131.x
更新日期:1999-07-01 00:00:00
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journal_title:Journal of anatomy
pub_type: 杂志文章
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journal_title:Journal of anatomy
pub_type: 杂志文章
doi:10.1111/j.0021-8782.2004.00304.x
更新日期:2004-06-01 00:00:00
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journal_title:Journal of anatomy
pub_type: 杂志文章
doi:
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journal_title:Journal of anatomy
pub_type: 杂志文章
doi:
更新日期:1985-08-01 00:00:00
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journal_title:Journal of anatomy
pub_type: 杂志文章
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journal_title:Journal of anatomy
pub_type: 杂志文章
doi:
更新日期:1979-01-01 00:00:00
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journal_title:Journal of anatomy
pub_type: 杂志文章
doi:
更新日期:1982-03-01 00:00:00
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journal_title:Journal of anatomy
pub_type: 杂志文章
doi:
更新日期:1996-10-01 00:00:00
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journal_title:Journal of anatomy
pub_type: 杂志文章
doi:
更新日期:1996-02-01 00:00:00
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journal_title:Journal of anatomy
pub_type: 杂志文章
doi:
更新日期:1988-10-01 00:00:00
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journal_title:Journal of anatomy
pub_type: 杂志文章
doi:10.1111/joa.12429
更新日期:2016-05-01 00:00:00
abstract::A total histological grade does not necessarily distinguish between different manifestations of cartilage damage or degeneration. An accurate and reliable histological assessment method is required to separate normal and pathological tissue within a joint during treatment of degenerative joint conditions and to sub-cl...
journal_title:Journal of anatomy
pub_type: 杂志文章
doi:10.1111/j.1469-7580.2012.01513.x
更新日期:2012-07-01 00:00:00
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journal_title:Journal of anatomy
pub_type: 杂志文章
doi:10.1046/j.1469-7580.2003.00134.x
更新日期:2003-01-01 00:00:00
abstract::Maternal intraperitoneal administration of 1 mg/kg 5-azacytidine to pregnant S1c:ICR mice on gestational Day 7.5 resulted in a high incidence of exencephalic offspring. Histological examination of untreated 7.5 days mouse embryos revealed that the head folds were formed in the anterior halves of the embryos, whereas t...
journal_title:Journal of anatomy
pub_type: 杂志文章
doi:
更新日期:1985-05-01 00:00:00
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journal_title:Journal of anatomy
pub_type: 杂志文章
doi:10.1111/joa.13342
更新日期:2020-10-22 00:00:00
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journal_title:Journal of anatomy
pub_type: 杂志文章
doi:
更新日期:1995-12-01 00:00:00
abstract::Genetic mutation leads to anatomical variation only indirectly because many proteins involved in generating anatomical structures in embryos operate cooperatively within molecular networks. These include gene-regulatory or control networks (CNs) for timing, signaling and patterning together with the process networks (...
journal_title:Journal of anatomy
pub_type: 杂志文章
doi:10.1111/joa.12205
更新日期:2014-08-01 00:00:00
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journal_title:Journal of anatomy
pub_type: 杂志文章
doi:10.1111/joa.13007
更新日期:2019-08-01 00:00:00
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journal_title:Journal of anatomy
pub_type: 杂志文章
doi:
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journal_title:Journal of anatomy
pub_type: 杂志文章
doi:10.1046/j.1469-7580.2003.00152.x
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journal_title:Journal of anatomy
pub_type: 杂志文章
doi:
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journal_title:Journal of anatomy
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abstract::Although the interspecific scaling of tetrapods is well understood, remarkably little work has been done on the ontogenetic scaling within tetrapod species, whether fossil or recent. Here the ontogenetic allometry of the femur, humerus, and tibia was determined for 23 species of non-avian dinosaur by regressing log-tr...
journal_title:Journal of anatomy
pub_type: 杂志文章
doi:10.1111/j.1469-7580.2010.01253.x
更新日期:2010-08-01 00:00:00
abstract::Crocodylians occupy a key phylogenetic position for investigations of archosaur locomotor evolution. Compared to the well-studied hindlimb, relatively little is known about the skeletal movements and mechanics of the forelimb. In this study, we employed manual markerless XROMM (X-ray Reconstruction Of Moving Morpholog...
journal_title:Journal of anatomy
pub_type: 杂志文章
doi:10.1111/joa.12102
更新日期:2013-11-01 00:00:00
abstract::The dogma that cutaneous wound healing is impaired as a function of age is largely unsubstantiated. This can be attributed to poor experimental design of human studies, the lack of subject characterisation with the exclusion of disease processes, and the study of inappropriate animal models. Structural and functional ...
journal_title:Journal of anatomy
pub_type: 杂志文章,评审
doi:
更新日期:1995-08-01 00:00:00
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journal_title:Journal of anatomy
pub_type: 杂志文章
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更新日期:2000-08-01 00:00:00
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journal_title:Journal of anatomy
pub_type: 杂志文章
doi:
更新日期:1983-06-01 00:00:00
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journal_title:Journal of anatomy
pub_type: 杂志文章
doi:
更新日期:1994-12-01 00:00:00