Resident Dendritic Cells in the Epidermis: Langerhans Cells, Merkel Cells and Melanocytes     

STEPHEN D. WHITE  JULIE A. YAGER† 《Veterinary dermatology》1995,6(1):1-8

Résumé— En plus des kératinocytes, l'épiderme contient des cellules résidentes de morphologie dendritique. Ce sont principalement la cellule de Langerhans, la cellule de Merkel et le mélanocyte. Ces cellules ont des fonctions diverses dans le tégument. Le mélanocyte assure la pigmentation cutanée et la protection contre les radiations U.V., et pourrait intervenir également dans la modulation de l'inflammation cutanée. La cellule de Langerhans intervient dans la surveillance immunologique des surfaces corporelles ecternes. La cellule de Merkel a des fonctions neuroendocrines. Cet article donne un aperçu de la structure et de la fonction de ces trois importantes populations cellulaires dans la peau. [Resident dentritic cells in the epidermis: Langerhans cells, Merkel cells and melanocytes (Cellules dentritiques résidentes de l'épiderme: cellules de Langerhans, cellules de Merkel et mélanocytes). Resumen— La epidermis contiene, además de los queratinocitos, células résidentes de morfologia dendria dendritica. Estas son principalmente las células de Langerhans, las células de Merkel y los melanocitos. Estas células tienen varias funciones en el integumento. Los melanocitos se encargan de la pigmentación y protección de la piel contra la radiación ultravioleta y tarrtbién participan en la regulación de la inflamación cutánea. Las células de Langerhans ayudan en la regulación inmunológica en la superficie externa. Las células de Merkel tienen funciones neuroendocrinas. Esta revisión da un repaso general a la estructura y función de tres importantes células de la piel. [Resident dendsuitic cells in the epidermis: Langerhans cells, Merkel cells and Melanocytes (Células résidentes en la epidermis: células de Langerhans, células de Merkel y melanocitos). Abstract— In addition to the keratinocytes, the epidermis contains resident cells of dendritic morphology. These are principally the Langerhans cell, Merkel cell and melanocyte. These cells have a number of different functions in the integument. The melanocyte is responsible for skin pigmentation and protection against UV radiation, and may also play a role in the modulation of cutaneous inflammation. The Langerhans cell aids in the immunological monitoring of the body's external surfaces. The Merkel cell has neuroendocrine functions. This review gives an overview of the structure and function of these three important cells of the skin.  相似文献   

Serological responses of specific pathogen-free foals to equine herpesvirus-1: primary and secondary infection, and reactivation.     

J S Gibson  T O'Neill  A Thackray  D Hannant  H J Field 《Veterinary microbiology》1992,32(3-4):199-214

Serum antibody (virus neutralisation, complement fixation, IgM and IgG) responses to equine herpesvirus-1 (EHV-1) infection were measured in six foals which were initially free from EHV-1 and EHV-4 infection and maternally-derived antibodies. Following primary infection, high titres of virus neutralisation and complement fixation antibodies were detectable against EHV-1, however, corresponding antibody levels against EHV-4 were low or inapparent, although the two viruses share a number of cross-reactive epitopes. In addition, following the primary infection with EHV-1, IgM levels increased before those of IgG, virus neutralisation and complement fixation antibodies, peaked sooner and thereafter declined. Stimulation of IgM levels was observed on secondary infection with EHV-1 given 61 days later. In contrast, IgG, virus neutralisation and complement fixation antibodies following primary infection were more sustained and no increase in their levels was observed on secondary infection. No consistent changes in IgM or IgG levels were seen after administration of dexamethasone to reactivate latent virus.  相似文献   

水稻不育系粒黑粉病普遍率与严重度间的关系     

黄富  潘学贤 《植物病理学报》1994,24(4):318-318

 稻粒黑粉病(病原菌Neovossia horrida (TaK.)Padw. et A. Kahn)是杂交稻繁殖制种田不育系上的主要病害,流行频率高,危害损失大。普遍率和严重度的关系(I-S关系)是植病流行学观测技术上的一个重要问题。  相似文献   

Surgical Complications and Wound Healing in the Small Animal Practice          下载免费PDF全文

Craig W. Miller 《The Canadian veterinary journal. La revue veterinaire canadienne》1995,36(7):454

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An Ecological Foodniche Concept as a Proxy for Fish-Pond Stocking Rates in Integrated Aquacultural Farming for Malaysia     

Howard A.  Clonts Curtis M.  Jolly  Syed Abdulkadir  L. Alsagoff 《Journal of the World Aquaculture Society》1989,20(4):268-276

The merits of integrated aquaculture farming (IAF) as a strategy for bolstering income for the rural poor have been recognized, but the economic efficiency and sustainability are yet to be determined. The effects of one species on another and the economic benefits, net of government support, have not been critically evaluated. The concept of a foodniche for alternative species in an aquatic environment has not been properly tested in an economic setting. Thus, this report reflects the results of applying the technique of mixed integer linear programming to determine the optimum combination of species within the context of a foodniche. The objective also included maximizing revenues, with minimal external input requirements, for a representative small Malaysian wet-rice farm. It was found that the foodniche concept permitted flexibility in stocking rates, and that farmers could actually stock species at the exact rate that was optimal for profit, instead of standard fixed rates. Also, government subsidies for pond construction were essential for IAF success. The net revenues from IAF were low without interest-free loans for pond construction.  相似文献   

Experience with fireblight in the Czech Republic1     

M. B&#x;halov 《EPPO Bulletin》2004,34(3):365-367

Erwinia amylovora has been spreading in the Czech Republic since 1986 regardless of emergency phytosanitary measures which have been taken. Its spread follows the predominant wind direction (west to east). The infested area now covers two thirds of the area of the country. Wild Crataegus spp. are the most important and widespread host plants. E. amylovora is still regulated as a quarantine pest, and areas free from fireblight are subject to special phytosanitary measures.  相似文献   

Plum pox virus (PPV) in Norway     

D. R. Blystad  T. Munthe 《EPPO Bulletin》2006,36(2):212-212

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Analysis of a Long-term Experiment with Repeated-measurement Models     

C. Richter  B. Kroschewski 《Journal of Agronomy and Crop Science》2006,192(1):55-71

Long‐term experiments are a classical case of repeated measurements. Traits are measured on the same experimental unit over many years so that correlations arise between the observations made on the same plot in consecutive years. This paper describes the analysis of a three‐crop‐rotation long‐term experiment. We analysed the yields of the crops and the organic carbon content in the topsoil over 30 consecutive years. Several variance–covariance approaches are discussed and the trait‐specific best fit is interpreted. Mixed models are used to describe the structure of the experiment. Both yields and soil organic carbon show a more or less pronounced variance heterogeneity. Especially for yields, the heterogeneity of cycles and years is dominant. The consideration of correlations results in a better model fit in all cases.  相似文献   

Dilated Cardiomyopathy in Juvenile Doberman Pinschers     

Andrea Vollmar DVM  Dipl. ECVIM-CA  Philip R. Fox DVM  MSc  Dipl. ACVIM  ECVIM-CA  Dipl. ACVECC  Kathryn M. Meurs DVM  PhD  Dipl. ACVIM  Si-Kwang Liu DVM  PhD  Dipl. ACVIM 《Journal of Veterinary Cardiology》2003,5(1):637

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Our changing world     

William E. Jones DVM  PhD  Editor 《Journal of Equine Veterinary Science》2003,23(12):514

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