• Food Science and Biotechnology
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• 제17권2호
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• pp.357-361
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• 2008

One of the major allergenic proteins in common buckwheat (Fagopyrum elculentum) was found to be a BW10KD. In this work, allergenic BW10KD genomic DNAs from the native common buckwheat 'Pyeongchang' and Tartarian buckwheat 'Clfa47' were cloned by polymerase chain reaction (PCR), and their nucleotide sequences were determined. In addition, a novel PCR assay targeting the allergenic BW10KD gene was developed to detect and differentiate both buckwheat species in food. The nucleotide sequences of the BW10KD genomic DNA from 'Pyeongchang' and 'Clfa47' were 94% identical. Base differences in the nucleotide sequences of the BW10KD genes are probably useful as a molecular marker for species-specific identification. The 'Pyeongchang'-specific primer set 154PF/400PR and the 'Clfa47'-specific primer set 154DF/253DR generated 247 and 100 bp fragments in singleplex PCR, respectively. A duplex PCR assay with 2 species-specific primer sets simultaneously differentiated the 'Pyeongchang' and 'Clfa47' in a single reaction. The PCR assay also successfully allowed for the rapid detection of buckwheat ingredients in foods.

• Clinical and Experimental Pediatrics
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• 제49권3호
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• pp.298-304
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• 2006

목 적 : 소아 천식이 급격히 증가하고 있다. 영유아 시기의 천명을 보이는 환아들에서 천식 발생을 예측할 수 있는 고위험군을 선별하는 지표들이 알려져 있다. 저자들은 Tucson Children's Respiratory Study Group에서 제시한 천식 예측 지표 API와 변형한 천식 예측 지표 mAPI를 한국 영유아 천명 환아들에게 적용하여 의미있는 예측 지표를 규명하고자 하였다. 방 법 : 반복성 천명을 주소로 서울아산병원 소아과를 방문한 262명의 환아들을 대상으로 API와 mAPI를 적용하여 고위험군과 저위험군으로 나누었다. 각 군에서 알레르기 지표 뿐만 아니라 환아와 가족들의 알레르기 질환의 병력을 조사하였다. 결 과 : API 고위험군 환아(n=131)는 저위험군 환아(n=131) 보다 성별은 차이가 없었고 연령, 총호산구수, 호산구 비율, 혈중 ECP, 총 IgE가 높았으며, 흔한 항원에 대한 감작 여부가 포함되지 않았지만 흡입항원과 식품항원에 대한 감작률이 더 높게 나타났다. mAPI 고위험군 환아(n=141)는 저위험군 환아(n=121) 보다 총호산구수, 호산구 비율, 혈중 ECP, 총 IgE, egg, milk, D.p-, D.f-특이 IgE 농도가 높았으며 성별과 연령의 차이는 없었다. 위험군별 다변량 분석에서는 API군에서는 흡입항원에 대한 감작 여부가 고위험군을 결정하는 유의한 지표로 나타났으며 mAPI군에서는 혈중 ECP 농도가 유의한 지표로 나타났다. 대상군 중 6세 이상 추적 관찰된 환아는 모두 29명이었으며 최근 1년간 천명의 병력이 확인되고 임상적으로 천식으로 진단된 환아는 15명이었다. API의 민감도, 특이도, 양성예측률, 음성예측률은 66.7%, 50.0%, 58.8%, 58.3%이었으며, mAPI는 93.3%, 57.1%, 70.0%, 88.9%로서 mAPI가 더 높았다. 결 론 : API와 mAPI를 적용한 고위험군 환아에서 흔한 흡입 항원과 식품항원에 대한 감작률이 높아서, 영유아 천명 환아에서 주관적인 증상에 의한 진단보다는 객관적인 흡입항원과 식품항원에 대한 감작 여부를 지표로 사용하는 것이 더 의미 있을 것으로 생각한다. 또한 한국 영유아 천명 환아에서는 mAPI가 소아 천식의 발생을 예측하는데 더 도움이 될 것으로 생각한다. 그러나 본 연구는 29명의 소수의 환아들만 추적 관찰된 결과이므로 이후로 보다 더 많은 환아들을 추적 관찰하는 것이 필요할 것이다.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2022년도 추계학술대회
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• pp.194-194
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• 2022

Recently, food-induced allergies have emerged as major global concerns. In the past ten years, it has doubled in western nations, and it has also increased in Asia and Africa. In many cases of food allergy, peanut allergy is prevalent, typically permanent, and frequently life-threatening. Therefore, we utilized gene editing techniques on the three major allergen genes in peanuts, Ara h 1, Ara h 2, and Ara h 3. Using gibson assembly and golden gate assembly, we created two vectors, the gRNA-tRNA array CRISPR-Cas9 system and Prime-editing. Using LBA4404 strain and agrobacterium-mediated transformation, the vectors were transferred to two elite Korean peanut lines. After co-cultivation and tissue culture, we extracted the tissue cultured peanut DNA amplified the hygromycin resistance gene and Cas9 gene in the T-DNA region. The integration of the T-DNA region into the host genome was demonstrated by the presence of a specific band in some samples. There have only been a few reported peanut gene editing studies. So, this study will contribute to peanut allergy and gene editing research.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2022년도 추계학술대회
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• pp.200-200
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• 2022

Recently, food-induced allergies have emerged as major global concerns. In the past ten years, it has doubled in western nations, and it has also increased in Asia and Africa. In many cases of food allergy, peanut allergy is prevalent, typically permanent, and frequently life-threatening. Therefore, we utilized gene editing techniques on the three major allergen genes in peanuts, Ara h 1, Ara h 2, and Ara h 3. Using gibson assembly and golden gate assembly, we created two vectors, the gRNA-tRNA array CRISPR-Cas9 system and Prime-editing. Using LBA4404 strain and agrobacterium-mediated transformation, the vectors were transferred to two elite Korean peanut lines. After co-cultivation and tissue culture, we extracted the tissue cultured peanut DNA amplified the hygromycin resistance gene and Cas9 gene in the T-DNA region. The integration of the T-DNA region into the host genome was demonstrated by the presence of a specific band in some samples. There have only been a few reported peanut gene editing studies. So, this study will contribute to peanut allergy and gene editing research.

• 한국축산식품학회지
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• 제27권3호
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• pp.337-344
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• 2007

2005년 3월부터 2006년 4월까지 어린이 74명(남 47, 여 27, 1-4세)을 대상으로 식품에 대한 IgE 특이 항체량을 검사하였다. 알레르기 증상을 나타낸 어린이의 연령은 영 유아(0-3세)가 34명, 4-6세가 24명, 7-9세가 8명, 10세 이상이 8명으로, 나이가 어릴수록 알레르기 증상을 보이는 어린이가 많은 것으로 나타났다. 검사한 어린이가 21종류의 식품 중 3종류, 4종류, 5종류의 식품에 반응을 보인 어린이는 각각 10명, 21명, 15명으로 나타났다. IgE 항체반응에서 class 2 미만으로 나타난 어린이의 식품은 콩 28명, 우유 29명, 치즈 21명, 난백 7명, 돼지고기 18명으로 나타났고 class 2 이상은 콩 20명, 우유 17명, 치즈 24명, 난백 20명, 돼지고기 21명으로 나타나 이러한 식품들이 주로 식품 알레르기와 관련이 있는 것으로 판단된다. 가족력에서는 알레르기 증상을 나타낸 비율이 남아는 45.5%, 여아는 50%로 절반 정도로 나타났고, 가족 중 알레르기 질병의 병력은 아토피 피부염은 26%, 아토피 비염은 10.5%,아토피 피부염과 아토피 비염은 31.5%, 두드러기 21.0%, 천식 10.5%이었다. 섭식력은 모유와 분유를 혼합하여 섭취한 어린이가 분유만 섭취한 어린이, 모유만 섭취한 어린이보다 높았다. 알레르기 유발식품으로 제한하는 식품은 계란과 우유 12.5%, 우유 2.5%, 계란 10.0%등이었다.

• Nutrition Research and Practice
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• 제9권5호
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• pp.517-522
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• 2015

BACKGROUND/OBJECTIVES: The objective of this study was to investigate food allergens and prevalence rates of food allergies, followed by comparison of consumer attitudes and preferences regarding food allergy labeling by diagnosis of food allergies. SUBJECTS/METHODS: A total of 543 individuals living in Seoul and Gyeonggi area participated in the survey from October 15 to 22 in 2013. RESULTS: The results show that the prevalence of doctor-diagnosed food allergies was 17.5%, whereas 6.4% of respondents self-reported food allergies. The most common allergens of doctor-diagnosed and self-reported food allergy respondents were peaches (30.3%) and eggs (33.3%), respectively, followed by peanuts, cow's milk, and crab. Regarding consumer attitudes toward food labeling, checking food allergens as an item was only significantly different between allergic and non-allergic respondents among all five items (P < 0.001). All respondents reported that all six items (bold font, font color, box frame, warning statement, front label, and addition of potential allergens) were necessary for an improved food allergen labeling system. PLSR analysis determined that the doctor-diagnosed group and checking of food allergens were positively correlated, whereas the non-allergy group was more concerned with checking product brands. CONCLUSIONS: An effective food labeling system is very important for health protection of allergic consumers. Additionally, government agencies must develop policies regarding prevalence of food allergies in Korea. Based on this information, the food industry and government agencies should provide clear and accurate food labeling practices for consumers.

• Nutritional Sciences
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• 제2권2호
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• pp.119-124
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• 1999

Food allergies play an important role in Atopic Dermatitis (AD). Dietary manipulation is essential in the management of AD. However, there has been a paucity of data reporting the prevalence of food allergies in AD patients in Korea. In this study, the Food Open Challenge Tests (FOCT) were conducted to investigate food allergies in AD patients. The skin-prick test and the detection of specific IgE, as well as allergy history of patient were used to detect food allergies in all AD patients. Elimination diet was conducted for two weeks prior to FOCTs. The prevalence of food allergies by FOCT is as follows: milk (67.3%); chicken (64.2%); pork (62.8%); eggs (61.0%); beef(55.4%) ; wheat (52.0%) and soybean (45.2%). Allergenic food items in Korean AD patients were different from people in other foreign countries. The seven major foods those tested positively by FOCTs were completely eliminated from the replaced diets for two weeks, and were subsequently reintroduced one at a time. Results from FOCTs were not comparable with allergy history or skin-prick tests or specific IgE detection. The sensitivity and specificity of skin-prick tests and specific IgE detection were lower than FOCTs. Allergy history, skin-prick tests, and specific IgE detection are useful for the identification of food allergen but its clinical significance differed according to food items. Therefore, we conclude that even though a 10-day delay was necessary after food challenge, FOCT is a useful and valid method to confirm food allergies and may be essential for the effective control of food allergies for treatment of AD.

• Journal of Dairy Science and Biotechnology
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• 제31권1호
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• pp.67-73
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• 2013

Food allergy is defined as adverse reactions toward food mediated by aberrant immune mechanisms. Cow's milk allergy is one of the most common food allergies in childhood. This allergy is normally outgrown in the first year of life, however 15% of allergic children remain allergic. Cow's milk allergy seem to be associated with casein (${\alpha}_{s1}$-CN), ${\beta}$-lactoglobulin and whey protein. In addition to this, many other milk proteins are antigenic and capable of inducing immune responses. Various food processing affects the stability, structure and intermolecular interactions of cow milk proteins, as a result reduction the allergenic capacity. Heating, hydrolysis, chemical, proteolytic and other processes such as gamma-ray irradiation, high pressure, using probiotics treatments of milk to obtain hypoallergenic milk have been developed to reduce allergic reactions.

• Food Science and Biotechnology
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• 제15권1호
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• pp.128-132
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• 2006

This study was undertaken to investigate the effect of peptic and chymotryptic hydrolyses of 7S globulin, the major allergen of soybean protein, on its allergenicity, as measured by enzyme linked immunosorbent assay (ELISA), and to identify the allergenic hydrolyzed fragments of 7S globulin using SDS-PAGE. When 7S globulin was hydrolyzed by pepsin, the allergenicity was reduced by over 50%. However, the allergenicity of 7S globulin reduced by peptic hydrolysis was recovered in the sera from 5 out of 10 patients following sequential chymotryptic hydrolysis. Two fragments, with molecular weights 20-25 and 13-16 kDa, among the hydrolysate of 7S globulin by sequential pepsin and chymotrypsin showed reactivity with sera from 10 soybean-allergenic patients. As a result of the theoretical hydrolyses of ${\beta}$-conglycinin, which is a major protein of 7S globulin, it is suggested that the 20-25 kDa fragments were the fragments of the ${\alpha}$-subunit of ${\beta}$'-conglycinin and that the 10-16 kDa fragments were from the ${\alpha}$'-subunit.

• 한방안이비인후피부과학회지
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• 제30권2호
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• pp.86-99
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• 2017

Objectives : The purpose of this study is to compare atopic dermatitis and food allergy of Korean Medicine with those of western medicine. Methods : We examined the relationship between atopic dermatitis and food allergy mainly in digestive system abnormalities through literature review. Results : Food allergy is classified into categories such as diarrhea, abdominal pain and cough caused by retention of undigested food(食積) and pimples(癮疹) in Korean medicine. The side effects caused by specific immune reactions occur repeatedly due to exposure to specific food allergen or retention of undigested food. Atopic dermatitis and food allergy are often coexisting and deeply related. Digestive system abnormalities can result not only in indigestion but also in immune function abnormalities. Food allergies are known to cause atopic dermatitis and the influx of food antigens exacerbates atopic dermatitis. This corresponds to atopic dermatitis due to abnormal digestive system(脾胃) accompanied by fever(熱), wind(風), and weakness(虛) with focusing on dampness(濕). A typical example of the relationship between atopic dermatitis and food allergy in Korean medicine is Tae-yeul (胎熱). Tae-yeul refers to atopic dermatitis caused by a sensitization to reaction to the dietary antigens of the mother through the placenta during the fetal life with a unusual genetic disposition. Conclusions : We compared korean medicine with western medicine for atopic dermatitis and food allergy. Atopic dermatitis caused by abnormal immune function due to ingestion of food antigen corresponds to dermatitis due to retention of undigested food(食積), digestive system(脾胃臟) problems in korean medicine.