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  • 1
    In: Cells Tissues Organs, S. Karger AG, Vol. 210, No. 4 ( 2021), p. 250-259
    Abstract: Immunodeficient mouse models with human skin xenografts have been developed in the past decades to study different conditions of the skin. Features such as follow-up period and size of the graft are of different relevance depending on the purpose of an investigation. The aim of this study is to analyze the different mouse models grafted with human skin. A systematic review of the literature was performed in line with the PRISMA statement using MEDLINE/PubMed databases from January 1970 to June 2020. Articles describing human skin grafted onto mice were included. Animal models other than mice, skin substitutes, bioengineered skin, postmortem or fetal skin, and duplicated studies were excluded 〈 b 〉 . 〈 /b 〉 The mouse strain, origin of human skin, graft dimensions, follow-up of the skin graft, and goals of the study were analyzed. Ninety-one models were included in the final review. Five different applications were found: physiology of the skin (25 models, mean human skin graft size 1.43 cm 〈 sup 〉 2 〈 /sup 〉 and follow-up 72.92 days), immunology and graft rejection (17 models, mean human skin graft size 1.34 cm 〈 sup 〉 2 〈 /sup 〉 and follow-up 86 days), carcinogenesis (9 models, mean human skin graft size 1.98 cm 〈 sup 〉 2 〈 /sup 〉 and follow-up 253 days), skin diseases (25 models, mean human skin graft size 1.55 cm 〈 sup 〉 2 〈 /sup 〉 and follow-up 86.48 days), and would healing/scars (15 models, mean human skin graft size 2.54 cm 〈 sup 〉 2 〈 /sup 〉 and follow-up 129 days). The follow-up period was longer in carcinogenesis models (253 ± 233.73 days), and the skin graft size was bigger in wound healing applications (2.54 ± 3.08 cm 〈 sup 〉 2 〈 /sup 〉 ). Depending on the research application, different models are suggested. Careful consideration regarding graft size, follow-up, immunosuppression, and costs should be analyzed and compared before choosing any of these mouse models. To our knowledge, this is the first systematic review of mouse models with human skin transplantation.
    Type of Medium: Online Resource
    ISSN: 1422-6405 , 1422-6421
    Language: English
    Publisher: S. Karger AG
    Publication Date: 2021
    detail.hit.zdb_id: 1481840-1
    SSG: 12
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  • 2
    Online Resource
    Online Resource
    S. Karger AG ; 2007
    In:  Journal of Vascular Research Vol. 44, No. 3 ( 2007), p. 192-201
    In: Journal of Vascular Research, S. Karger AG, Vol. 44, No. 3 ( 2007), p. 192-201
    Abstract: 〈 i 〉 Background: 〈 /i 〉 Although the etiology of venous insufficiency is not well understood, immune response and aging are beginning to emerge as contributing factors. Factors involved in tissue remodeling such as TGF-β 〈 sub 〉 1 〈 /sub 〉 also seem to play an important role in extracellular matrix production. The aim of this study was to explore the relationship between chronic venous insufficiency and TGF-β 〈 sub 〉 1 〈 /sub 〉 examining the latent/mature form of TGF-β 〈 sub 〉 1 〈 /sub 〉 and the presence of mast cells. Effects of age were also evaluated. 〈 i 〉 Methods: 〈 /i 〉 Saphenous veins were obtained from patients subjected to aortocoronary bypass (controls) and undergoing varicose vein surgery. These were immunolabeled using anti-LAP TGF-β 〈 sub 〉 1 〈 /sub 〉 /anti-TGF-β 〈 sub 〉 1 〈 /sub 〉 antibodies and subjected to Western blot. Mast cell population was identified by metachromatic staining. 〈 i 〉 Results: 〈 /i 〉 Latent TGF-β 〈 sub 〉 1 〈 /sub 〉 was significantly reduced in varicose veins from older subjects. In contrast, smooth muscle cells obtained from the varicosities showed intense levels. Mature TGF-β 〈 sub 〉 1 〈 /sub 〉 significantly differed between healthy and varicose veins. No mature TGF-β 〈 sub 〉 1 〈 /sub 〉 was detected in the cell cultures. Mast cell number and degranulation were increased with aging and varicose disease, colocalizing with the mature form of TGF-β 〈 sub 〉 1 〈 /sub 〉 . 〈 i 〉 Conclusion: 〈 /i 〉 Aging and varicose pathology induce dysregulation of TGF-β 〈 sub 〉 1 〈 /sub 〉 that could play an important role in the fibrous process, representing the final stages of venous insufficiency.
    Type of Medium: Online Resource
    ISSN: 1018-1172 , 1423-0135
    Language: English
    Publisher: S. Karger AG
    Publication Date: 2007
    detail.hit.zdb_id: 1482726-8
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  • 3
    In: Cells Tissues Organs, S. Karger AG, Vol. 206, No. 4-5 ( 2018), p. 272-282
    Abstract: Chronic venous disorder (CVeD), is a disorder in which there is a modification in the conditions of blood return to the heart. The disorder may arise from incompetent valves and the resultant venous reflux (chronic venous insufficiency, CVI). The economic burden of CVeD on health systems is high, and research efforts have sought to elucidate the mechanisms involved as possible therapeutic targets. The mitogen-activated protein kinase (MAPK) enzymes mediate a wide array of physiopathological processes in human tissues. In this family of proteins, extracellular signal-regulated kinase (ERK)1/2 plays a direct role in the cell homeostasis that determines the viability of mammalian tissues. This study sought to examine whether ERK1/2 plays a role in venous reflux. This was a prospective study performed on 56 participants including 11 healthy controls. Of the CVeD patients, 23 had venous reflux with CVI (CVI-R) and 22 had no reflux (NR). Distribution by age was: controls & #x3c;50 years ( 〈 i 〉 n 〈 /i 〉 = 4) and ≥50 years ( 〈 i 〉 n 〈 /i 〉 = 7); NR & #x3c;50 years ( 〈 i 〉 n 〈 /i 〉 = 9) and ≥50 years ( 〈 i 〉 n 〈 /i 〉 = 13); CVI-R & #x3c;50 years ( 〈 i 〉 n 〈 /i 〉 = 11) and ≥50 years ( 〈 i 〉 n 〈 /i 〉 = 12). Great saphenous vein specimens were subjected to gene (real-time polymerase chain reaction, RT-qPCR) and protein (immunohistochemistry, IHC) expression techniques to identify ERK1/2. Data was compared between groups using the Mann Whitney U test. Patients with CVI showed significant gene activation of ERK1/2 protein, and, in those with venous reflux, the expression of this gene was significantly greater. The CVI-R group & #x3c;50 years showed significantly greater 〈 i 〉 ERK1/2 〈 /i 〉 gene expression than their age-matched controls. Expression patterns were consistent with IHC findings. Our studies suggest that ERK1/2 expression is involved in venous vascular disease.
    Type of Medium: Online Resource
    ISSN: 1422-6405 , 1422-6421
    Language: English
    Publisher: S. Karger AG
    Publication Date: 2018
    detail.hit.zdb_id: 1481840-1
    SSG: 12
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