• Title/Summary/Keyword: house dust mite

Search Result 90, Processing Time 0.031 seconds

Efficacy of Half Dose House Dust Mites-Specific Immunotherapy on Canine Atopic Dermatitis

  • Park, Jeong-Ho;Lee, Wang-Hui;Park, Seong-Jun
    • Journal of Veterinary Clinics
    • /
    • v.34 no.1
    • /
    • pp.18-22
    • /
    • 2017
  • The aim of this study was to prove that the hypothesis of half dose (HD) allergen-specific immunotherapy (ASIT) in the treatment of canine atopic dermatitis (CAD) would result in a similar success rate compared to the standard dose (SD) ASIT. Clinical signs were evaluated using a third version of the Canine Atopic Dermatitis Extent and Severity Index (CADESI-03) prior to ASIT (day 0), at the end of induction (day 43), and at three month afterwards (day 90). Of the 18 atopic dogs, 12 dogs (SD group: 6; HD group: 6) had a good - excellent response to the house dust mites-specific immunotherapy. The efficacies of ASIT were 66.6% in both groups. The grades of reduction rate CADESI-03 were not different between two groups. Therefore, half dose protocol of house dust mites-specific immunotherapy is an effective and efficient method to treat CAD.

Monoclonal antibodies to recombinant Der p2, a major house dust mite allergen: specificity, epitope analysis and development of two-site capture ELISA

  • Yong, Tai-Soon;Lee, Sang-Mi;Park, Gab-Man;Lee, In-Yong;Ree, Han-Il;Kim, Kyung-Sup;Oh, Sang-Hwan;Park, Jung-Won;Hong, Chein-Soo
    • Parasites, Hosts and Diseases
    • /
    • v.37 no.3
    • /
    • pp.163-169
    • /
    • 1999
  • House dust mite allergens have been well established as sensitizing agents that are important in the induction of allergic diseases. In order to analyze epitopes of the allergen and to develop a quantitative method of the allergen exposure, monoclonal antibodies against a recombinant Der p 2 (rDer p 2), one of the major allergens of Dermatophogoides pteronyssinus, were produce. Four monoclonal antibodies produced wee species-specific and did not cross-react to the D. farinae crude extract. Two of the monoclonal antibodies were found to be IgG1 and the others were IgM. For the analysis of epitopes, a Der p 2 cDNA encoding 126 amino acids (aa) was dissected into three fragments with several overlapping peptides, A (aa residues 1-49), B (44-93), and C fragment (84-126). Three monoclonal antibodies showed reactivities to the recombinant B fragment and to the full-length rDer p 2, but one monoclonal antibody reacted only with the full-length rDer p 2. Two-site capture ELISA was developed using two different monoclonal antibodies for quantitating Der p2 in house dust. The sensitivity limit was 4ng/ml with rDer p2 and $8{\;}\mu\textrm{g}/ml$ with the d. pteronyssinus crude extract. The result suggested that the assay using monoclonal antibodies against rDer p2 could be useful for the environmental studies and for the standardization of mite allergen extracts.

  • PDF

Development of mass rearing technique of Tyrophnn putrescentiae (Acari: Acaridae) found in house dust (집먼지에 서식하는 긴털가루진드기(진드기목: 가루진드기과)의 대량 사육방법 개발)

  • 이한일;이인용
    • Parasites, Hosts and Diseases
    • /
    • v.35 no.3
    • /
    • pp.149-154
    • /
    • 1997
  • A storage mite, Tyrophcgus putrescentiae, is recently known to be widely distributed in Korea, being commonly found in house dust, and may, therefore, be allergenically important. The purpose of this study was to develop mass rearing techniques for supplying a large quantity of allergens. The laboratory mouse food powder gave the highest yield, showing 1,251.5-fold increase in number after 10 weeks, and the mixed powder of laboratory mouse food and yeast (1 : 1) also gave same level of the production (1.203 1-fold increase in week 10). Several different combinations of temperature and relative humidity conditions were compared, and the maximum propagation was obtained at $25^{\circ}C$ and 64% RH, showing 960-fold increase in number. When the same amount of culture media was used the size of the culture container did not significantly influence the quantitative yield of T. putrescentice mites.

  • PDF

Chemotactic Effect of the House Dust Mite Allergen, Dermatophagoides pteronyssinus on Human Monocytic THP-1 Cells

  • Yang, Eun-Ju;Lee, Ji-Sook;Yun, Chi-Young;Kim, In-Sik
    • Biomedical Science Letters
    • /
    • v.15 no.1
    • /
    • pp.93-96
    • /
    • 2009
  • House dust mites (HDMs) play an important role in the occurrence of allergic diseases such as asthma and atopic dermatitis. Dermatophagoides pteronyssinus (Der p) is one of the most prevalent HDMs. It mediates the activation of T cells and monocytes, and induces the elevation of immunoglobulin E levels in allergic diseases. However, the effects of Der p on human monocytes have not been fully understood. In the present study, we investigated whether or not Der p has a great effect on the chemotactic activity of the human monocytic cell line, THP-1 cells, as induced by CC chemokines. We also show that the Der p extract (DpE) increased the chemotactic activity of THP-1 cells in response to MCP-1, RANTES, MIP-1${\alpha}$, and TARC, but had no effect on the expressions of CC chemokine receptors (CCRs) binding to CC chemokines in THP-1 cells. Protease inhibitors, such as aprotinin and E64, blocked the increased chemotaxis, while cytoplasmic $Ca^{2+}$ influx mediated by these chemokines was inhibited by DpE. These results indicate that DpE increases the chemotactic activity of THP-1 cells in response to CC chemokines by regulating the cells' protease-dependent mechanism. This finding may be useful in identifying the pathogenesis of allergic diseases induced by Der p.

  • PDF

Effects of Mite Antigen and Toxic Shock Syndrome Toxin-1 on the Biological Actvity of Human Fibroblast (Toxic Shock Syndrome Toxin-1 및 Mite 항원이 사람섬유아세포의 생물활성에 미치는 효과)

  • 김광혁;옥미선;유태현
    • Journal of Life Science
    • /
    • v.6 no.2
    • /
    • pp.111-119
    • /
    • 1996
  • The production of interleukin-1(IL-1)and nitric oxide(NO) by cultured fibroblast cells of human nasal turbinate was revealed by biological assay respectively. The cells were incubated for various periods of time in the presence of staphyloccocal toxic shock syndrome toxin-1(TSST-1) and house dust mite(Dermatophagoides farinae, HDM), and the culture supernatants were harvested. There was a little difference in the activities of IL-1beta and the amount of NO produced by the cells when stimulated with 0.002-0.1$\mu$g/ml of TSSTO-1 and 0.02-1$\mu$g/ml of HDM. The shapes of the time course curves for the production of IL-1beta and NO by the cells were different. Groups stimulated with TSST-1 or HDM produced more IL-beta in 2 h than no exposure group(Control). A certain mixed group(TSST-1, 10ng+mite, 100 ng) continued to produce IL-1beta highly throughout the entire incubation period. The cells stimulated with TSST-1 or HDM produced more NO in 2 h and 6 h than that produced in the end of incubation(48 h). Also, the mixed groups were generally similar. There results suggest that induction of IL-1beta by a certain mixed condition(TSST-1+mite) in fibroblast cell in vivo may play a role in inflammation.

  • PDF

The Relationship between House Dust Mite Sensitization and Month Birth Distribution in Children with Respiratory Allergy (호흡기 알레르기 환아에서 집먼지진드기 감작과 출생 월 분포의 연관성)

  • Kang, Eun Kyeong;Na, Kyu Min;Kang, Hee;Yoo, Young;Koh, Young Yull
    • Clinical and Experimental Pediatrics
    • /
    • v.46 no.4
    • /
    • pp.370-375
    • /
    • 2003
  • Purpose : It has been suggested that the exposure to aeroallergens during early infancy after birth is important in the subsequent development of sensitization and allergic diseases. In Korea, the level of house dust mites as one of the important aeroallergens is known to be the highest in autumn. The aim of this study was to test whether the distribution of month of birth bears a relationship to the presence of mite sensitization in children with respiratory allergy. Methods : Skin prick tests and methacholine provocation tests were performed on 1,327 patients with chronic respiratory symptoms who visited Seoul National University Children's Hospital from January 1995 to May 2002. An analysis of patients' month of birth distribution according to the presence of mite sensitization was performed. Results : Atopic subjects who had at least one positive skin test numbered 864(65.1%); and non-atopic subjects numbered 463(34.9%). Among atopic subjects, 787(59.3%) had positive skin tests to mites and 77(5.8%) had positive skin test only to minor allergens. A significantly greater than expected number of mite atopic subjects were born in the months between August and November(P=0.03), however, the birth month of non-atopic subjects didn't show a consistent seasonal preference. Asthma patients numbered 543(40.9%). Among these, atopic asthmatics numbered 421(77.5%) and non-atopic asthmatics, 122(22.5%). Dust-mite atopic asthmatics numbered 387(91.9%) out of 421 atopic asthmatics. Dust-mite atopic asthmatics were born significantly higher in the season lasting from August to November in comparison to non-atopic asthmatics(P=0.002). Conclusion : Month of birth seems to be related with sensitization to allergens. Our results show that August to November is the risk period for the development of mite sensitization in Korea.

Increased Allergen-specific IgE Values and Lymphocyte Proliferation Response to House Dust Mites in Dogs with Atopic Dermatitis (개의 아토피성 피부염에 대한 집먼지 진드기 항원 특이적 IgE와 림프구 증식 반응의 증가)

  • Park, Seong-jun
    • Journal of Veterinary Clinics
    • /
    • v.21 no.2
    • /
    • pp.93-96
    • /
    • 2004
  • We examined the responses of PBMCs to house dust mite (HDM) allergen in atopic and healthy, non-atopic dogs to identify differences in lymphocyte reactivity that might reflect the immunologic status of atopic dermatitis. Thirteen of 20 (65%) atopic dogs showed a positive lymphocyte proliferative response to HDM allergen. The rate of response was significantly higher in the atopic dogs than that in healthy, non-atopic dogs insensitive to the allergen (P = 0.007). The proliferative responses were positively correlated with the level of HDM-specific IgE in serum (P = 0.035), and were thereby confirmed to reflect the activity of lymphocytes competent to promote IgE production. These results suggest that HDM-specific lymphocytes were present in peripheral blood and played a role in the pathogenesis of canine atopic dermatitis.

Prevalence of Causative Allergens on Canine Atopic Dermatitis in Daejeon Area (대전지역 아토피성 피부염 이환견의 양성항원 분포)

  • Song Kun-ho;Lee Jung-youn;Liu Jianzhu;Lee Sang-eun;Park Seong-jun;Kim Duck-hwan
    • Journal of Veterinary Clinics
    • /
    • v.22 no.1
    • /
    • pp.26-30
    • /
    • 2005
  • The purpose of this study is to investigate the prevalent allergens causing canine atopic dermatitis in Daejeon area. Twenty two dogs were diagnosed with atopic dermatitis by an using intradermal skin test (IDST). Allergens used for the IDST included 33 allergen extracts from nine allergen groups: house dust mites (HDM), house dust, moulds, trees, weeds, grasses, insects/fleas, epithelia and others. The 22 purebred dogs with atopic dermatitis enrolled in this study included Shi-tzus (10/22, 45.5%), Yorkshire terriers (5/22, 22.7%), Miniature pinschers (4/22, 18.2%), Pugs (2/ 22, 9.1 %) and Cocker spaniels (1/22, 4.5%). The age of onset of atopic dermatitis ranged from 5 months to 5 years old (median: 1.79 years). The males (12/22, 54.5%) and females (10/22, 45.5%) were almost equal. The number of positive reactions to allergens recorded in each dog with atopic dermatitis was 3 (9/22, 40.9%), 2 (8/22, 36.4%), 1 (3/ 22, 13.6%) and 4 (2/22, 9.1 %), respectively. The most common positive allergen reaction was HDM (52.6%). The other positive allergen reactions recorded were from house dust (17.5%), insects/fleas (15.8%), trees (5.3%), moulds (3.5%), kapok (3.5%), silk (3.5%), epithelia (1.8%), weeds (0%) and grasses (0%), respectively. Positive reactions recorded to Dermatophagoides farinae and D. pteronyssinus were in 53.3% and 46.7%, respectively. The IDST results demonstrate that the most common causative allergens in canine atopic dermatitis in Daejeon area were HDM.

House Dust Mite Allergen Inhibits Constitutive Neutrophil Apoptosis by Cytokine Secretion via PAR2/PKCδ/p38 MAPK Pathway in Allergic Lymphocytes (알레르기 림프구에서 집먼지진드기 알러젠의 PAR2/PKCδ/p38 MAPK 경로를 통한 사이토카인 증가는 호중구의 세포고사를 억제시킨다)

  • Lee, Na Rae;Lee, Ji-Sook;Kim, In Sik
    • Korean Journal of Clinical Laboratory Science
    • /
    • v.48 no.3
    • /
    • pp.188-195
    • /
    • 2016
  • Neutrophils and lymphocytes are essential inflammatory cells in the pathogenesis of allergy. In this study, we evaluated the role of house dust mite (HDM) in the interaction between allergic lymphocytes and neutrophils. The extract of Dermatophagoides pteronissinus (DP) showed a stronger anti-apoptotic impact on neutrophil apoptosis in the coculture of allergic neutrophils with allergic lymphocytes when compared with that in allergic neutrophils alone. DP increased IL-6, IL-8, MCP-1, and GM-CSF in allergic lymphocytes, and the increased cytokines were inhibited by rottlerin-an inhibitor of the protein kinase C (PKC) ${\delta}$, as well as by SB202190-a p38 MAPK inhibitor. DP activated p38 MAPK in a time-dependent manner. The activation of p38 MAPK was suppressed by PAR2i, which is a protease-activated receptor (PAR) 2 inhibitor, and rottlerin. Both aprotinin-a serine protease inhibitor-and E64-a cysteine protease inhibitor-were not effective on cytokine secretion of lymphocytes. These results, despite increased cytokines in allergic lymphocytes via DP, did not show any differences between asthma and allergic rhinitis. Molecules, including cytokines, released by DP in lymphocytes inhibited the migration of neutrophils. This finding may further elucidate the pathogenic mechanism of allergic diseases due to HDM.