Abstract：
:The stratum corneum, which is the outermost layer of the skin, functions as an important barrier to maintain biological homeostasis. The multilamellar structures formed by intercellular lipids present in the stratum corneum are considered to play an important role in barrier function. Most intercellular lipids are unbound and can be extracted by organic solvents, but some intercellular lipids are covalently bound to cornified envelope proteins. Decreases in unbound lipid levels reduce the barrier function of the stratum corneum, but the relationship between bound lipid and the barrier function of the stratum corneum is not well understood. In this study, we examined the relationship between the amount of covalently bound ceramide, the main bound lipid, and the barrier function of the stratum corneum. A single dose of UVB irradiation (2 x MED), or continuous UVB irradiation (0.5 x MED/day for 14 days) to the back, or feeding with an essential fatty acid-deficient (EFAD) diet for 8 weeks caused a significant elevation of TEWL and a significant reduction in covalently bound ceramides in hairless rats. Transmission electron microscopy revealed that the intercellular multilamellar structures in the stratum corneum of treated rats were incomplete (folding, defects, unclear images) compared to the structures seen in the stratum corneum of non-UVB-irradiated and non-EFAD rats. These results suggest that the amount of covalently bound ceramides is highly correlated with the barrier function of the skin, and that covalently bound ceramides play an important role in the formation of lamellar structures, and are involved in the maintenance of the barrier function of the skin.
journal_name
Arch Dermatol Resjournal_title
Archives of dermatological researchauthors
Meguro S,Arai Y,Masukawa Y,Uie K,Tokimitsu Idoi
10.1007/s004030000160keywords:
subject
Has Abstractpub_date
2000-09-01 00:00:00pages
463-8issue
9eissn
0340-3696issn
1432-069Xjournal_volume
292pub_type
杂志文章abstract：:Polymorphonuclear leukocytes from patients with psoriasis demonstrated a significantly enhanced chemotactic responsiveness to zymosan-activated human serum as compared to granulocytes from healthy volunteers. Furthermore, psoriatic peripheral blood mononuclear cells stimulated with concanavalin a produced an increased...
journal_title：Archives of dermatological research
pub_type： 杂志文章
doi：10.1007/BF00409454
更新日期：1981-01-01 00:00:00
abstract：:The internal stratum corneum lipid composition was investigated in relation to depth in vivo in healthy human volunteers by extraction following one, three or five strippings. Automated multiple development high-performance thin-layer chromatography (AMD-HPTLC) and gas chromatography (GC) followed by normalized princi...
journal_title：Archives of dermatological research
pub_type： 临床试验,杂志文章,随机对照试验
doi：10.1007/s004030050158
更新日期：1997-01-01 00:00:00
abstract：:Genetic abnormalities for different subtypes of epidermolysis bullosa (EB) have been described. In dominant simplex type EB, mutations of the K5 or K14 gene lead to disruption of basal cells and the formation of bullae. The recessive simplex types include EB with muscular dystrophy due to abnormal plectin, EB without ...
journal_title：Archives of dermatological research
pub_type： 杂志文章,评审
doi：10.1007/s00403-002-0369-0
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abstract：:When determined in vitro, the SPF of certain commercial sunscreen products can be lower than the SPF indicated on the label. The study of the composition of this type of product enabled us to note that the majority contained substances reputed to have anti-inflammatory properties. This effect is shown by inhibiting th...
journal_title：Archives of dermatological research
pub_type： 杂志文章
doi：10.1007/s00403-012-1257-x
更新日期：2012-12-01 00:00:00
abstract：:The demonstration of cytokine mRNA expression in epidermal cells by the polymerase chain reaction technique preceded by reverse transcription (RT-PCR) requires linear test conditions (i.e. that the product obtained after amplification reflects the relative amounts of starting material) and high reproducibility, specif...
journal_title：Archives of dermatological research
pub_type： 杂志文章
doi：10.1007/BF00370722
更新日期：1994-01-01 00:00:00
abstract：:Conditions of oxidative stress lead to down-regulation of glutathione (GSH) and glutathione peroxidase (GPO), which could be responsible for tyrosinase induction in pigment cells. To address this question, the effects of selective modulation of GSH metabolism on melanogenic parameters of slightly and highly melanized ...
journal_title：Archives of dermatological research
pub_type： 杂志文章
doi：10.1007/s004030050202
更新日期：1997-05-01 00:00:00
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journal_title：Archives of dermatological research
pub_type： 杂志文章
doi：10.1007/BF00412622
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journal_title：Archives of dermatological research
pub_type： 杂志文章
doi：10.1007/s00403-012-1218-4
更新日期：2012-03-01 00:00:00
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journal_title：Archives of dermatological research
pub_type： 杂志文章,评审
doi：10.1007/s00403-011-1166-4
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journal_title：Archives of dermatological research
pub_type： 杂志文章,评审
doi：10.1007/s00403-018-1823-y
更新日期：2018-07-01 00:00:00
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journal_title：Archives of dermatological research
pub_type： 杂志文章
doi：10.1007/s00403-017-1797-1
更新日期：2018-03-01 00:00:00
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journal_title：Archives of dermatological research
pub_type： 杂志文章
doi：10.1007/s00403-018-1863-3
更新日期：2018-11-01 00:00:00
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journal_title：Archives of dermatological research
pub_type： 杂志文章
doi：10.1007/s00403-015-1582-y
更新日期：2015-10-01 00:00:00
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journal_title：Archives of dermatological research
pub_type： 杂志文章
doi：10.1007/s00403-002-0381-4
更新日期：2003-03-01 00:00:00
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journal_title：Archives of dermatological research
pub_type： 杂志文章
doi：10.1007/BF00505639
更新日期：1990-01-01 00:00:00
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journal_title：Archives of dermatological research
pub_type： 杂志文章
doi：10.1007/BF00373353
更新日期：1993-01-01 00:00:00
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journal_title：Archives of dermatological research
pub_type： 杂志文章
doi：10.1007/s00403-008-0863-0
更新日期：2008-07-01 00:00:00
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journal_title：Archives of dermatological research
pub_type： 杂志文章
doi：10.1007/BF00406686
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doi：10.1007/BF00417528
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pub_type： 杂志文章
doi：10.1007/BF00404624
更新日期：1984-01-01 00:00:00
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journal_title：Archives of dermatological research
pub_type： 杂志文章
doi：10.1007/s00403-014-1517-z
更新日期：2014-12-01 00:00:00
abstract：:Diabetic foot ulcers (DFUs) are chronic wounds with high matrix metalloproteinase (MMP) activity, and are a frequent complication on diabetics. This work studied the expression of selected MMP and tissue inhibitor of metalloproteinases (TIMP) gene family members in DFU and normal skin biopsies, and in vitamin D-treate...
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pub_type： 杂志文章
doi：10.1007/s00403-014-1494-2
更新日期：2014-11-01 00:00:00
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journal_title：Archives of dermatological research
pub_type： 临床试验,杂志文章
doi：10.1007/s00403-005-0607-3
更新日期：2005-12-01 00:00:00
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pub_type： 杂志文章
doi：10.1007/s00403-020-02182-y
更新日期：2021-01-12 00:00:00
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journal_title：Archives of dermatological research
pub_type： 杂志文章
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journal_title：Archives of dermatological research
pub_type： 杂志文章
doi：10.1007/BF00372090
更新日期：1990-01-01 00:00:00
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journal_title：Archives of dermatological research
pub_type： 杂志文章
doi：10.1007/s00403-005-0634-0
更新日期：2006-03-01 00:00:00
abstract：:The expression and location of the Ki-67 antigen was investigated in 62 basal cell carcinomas (BCC) using immunostaining techniques (PAP and APAAP) on cryostat sections. The tumor samples were classified into three groups according to microarchitecture (nodular, superficial or fibrosing). The Ki-67 growth fraction dis...
journal_title：Archives of dermatological research
pub_type： 杂志文章
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更新日期：1993-01-01 00:00:00
