• The Korean Journal of Pain
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• 제34권2호
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• pp.241-245
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• 2021

Background: It has been reported that a new type of headache may develop as a result of face mask use during the COVID-19 pandemic. The aim of this study is to investigate the clinical features of face mask-related headache during the COVID-19 pandemic. Methods: This is a cross-sectional study carried out on healthcare workers at the Afyonkarahisar Health Sciences University. The number of workers at our university was established. Sample size was calculated using the G*Power program. A questionnaire consisting of questions relating to pre-existing headache, an aggravation in headache, and de-novo headache was filled out by 3 neurologists with all participants. Results: Data was collected from a total of 375 participants, after the exclusion of 5 individuals who refused to participate. Out of all participants, 26 (6.9%) used a filtering mask, 274 (73.1%) used a surgical mask, 75 (20.0%) participants used a combination of both masks. The number of participants with preexisting headache was 114 (30.4%) had pre-existing headache. Of those with pre-existing headache, 77 (67.5%) healthcare workers had reported an aggravation in their headache after mask use. De-novo headache was observed in 116 (30.9%) of participants. De-novo headache characteristics included throbbing in 17 (14.7%) participants and pressing in 99 (85.3%) participants. In addition, symptoms such as tachypnea, sleep disturbance, and fatigue were found to be significantly higher. Conclusions: This study indicates that healthcare workers develop headaches due to use of masks during the COVID-19 outbreak.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2022년도 추계학술대회
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• pp.32-32
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• 2022

Abaca (Musa textilis L. Nee) is a native Musa species from the Philippines known for its natural fiber. Abaca fiber a.k.a. Manila hemp extracted from its pseudostems is considered one of the strongest fibers in the world. This is used for commodities such as ropes, papers, and money bills. Abaca is vulnerable to pests and diseases such as the Abaca Bunchy Top Disease (ABTD) caused by Abaca Bunchy Top Virus (ABTV) and Banana Bunchy Top Virus (BBTV). Inosa, one of the varieties of abaca utilized in the Philippines, is highly susceptible to ABTD. In contrast, Pacol (Musa balbisiana L.), a close relative of abaca, is highly resistant to the same disease. Here, we report the sequencing and de novo genome assembly of both abaca var. Inosa and banana var. Pacol. A total of ~16 Gb and ~21 Gb raw reads for Inosa and Pacol, respectively, were generated using Pacbio Hifi sequencing method and assembled with Hifiasm. High-quality de novo assemblies of both Musa species with 99% recovered as per BUSCO analysis were obtained. The assembled Inosa genome has a total length of ~654 Mb and N50 of 7 Mb while Pacol has a total length of 527 Mb and N50 of 3 Mb which are close to their estimated genome size of ~638 Mb and ~503 Mb, respectively. The information that can be derived from the de novo assembled genomes would provide a solid foundation for further research in disease resistance and fiber quality improvement in abaca.

• Clinical and Experimental Reproductive Medicine
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• 제31권2호
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• pp.105-110
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• 2004

Objectives: Despite severe oligospermia, males with Y chromosome microdeletion can achieve conception through ICSI (Intracytoplasmic Sperm Injection). However, ICSI may not only result in the transmission of microdeletions but also the expansion of deletion to the offspring. The purpose of this study was to screen vertical transmission, expansion of microdeletions and de novo deletion in male fetuses conceived by ICSI. Materials and Methods: A total of 32 ICSI treated patients with their 33 (a case of twin) male fetuses conceived by ICSI were used to make this study group. Sequence-tagged sites (STSs)-based PCR analyses were performed on genomic DNA isolated from peripheral blood of fathers and from the amniocytes of male fetuses. Ten primer pairs namely, sY134, sY138, MK5, sY152, sY147, sY254, sY255, SPGY1, sY269 and sY158 were used. The samples with deletions were verified at least three times. Results: We detected a frequency of 12.5% (4 of the 32 patients) of microdeletions in ICSI patients. In 4 patients with detected deletions, two patients have proven deletions on single STS marker and their male fetuses have the identical deletion in this region. Another two patients have two and three deletions, but their male fetuses have more than 3 deletions which include deletions to their father's. Meanwhile, seven male fetuses, whose fathers were analyzed to have all 10 STS markers present, have deletions present in at least one or more of the markers. Conclusions: Although the majority of deletions on the Y chromosome are believed to arise de novo, in some cases a deletion has been transmitted from the fertile father to the infertile patient. In other cases the deletion was transmitted through ICSI treatment, it is likely that one sperm cell is injected through the oocyte's cytoplasm and fertilization can be obtained from spermatozoa. Our tests for deletion were determined by PCR and our results show that the ICSI treatment may lead to vertical transmission, expansion and de novo Y chromosome microdeletions in male fetuses. Because the sample group was relatively small, one should be cautious in analyzing these data. However, it is important to counsel infertile couples contemplating ICSI if the male carries Y chromosomal microdeletions.

• 정보과학회 컴퓨팅의 실제 논문지
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• 제20권9호
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• pp.513-518
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• 2014

NGS 기술의 발달로 시퀀싱 비용이 급격히 하락됨에 따라 대규모 크기의 유전체 염기 서열해독을 소규모의 실험실에서 수행할 수 있게 되었다. 디노버 어셈블리는 표준 유전체가 없는 새로운 종을 시퀀싱하는 경우 리드들의 염기 서열 정보를 이용하여 재구성함으로써 원래의 전체 시퀀스를 복원하는 것이다. 최근 이와 관련된 많은 연구 결과가 보고되고 있으나, 충분한 분석 노하우와 명확한 가이드라인 등이 공개되어 있지 않기 때문에 이들 연구에서 제시하는 동일한 어셈블리 수행 과정 및 분석 툴들을 사용하더라도 만족할만한 수준의 어셈블리 결과를 얻지 못하는 경우가 발생한다. 본 연구에서는 이러한 문제점을 해결하기 위하여 NGS 기술과 디노버 어셈블리 기술을 이용하여 아직 밝혀지지 않은 생물체의 전체 DNA의 염기 서열을 밝히기 위한 일련의 과정들을 단계별로 소개하고, 각 단계에서 필요로 하는 공개용 분석 툴의 장단점을 분석하여 제시한다. 이러한 과정별 단계를 구체적으로 설명하기 위하여 본 연구에서는 350Mbp 크기의 개 회충 게놈을 응용 사례로 사용한다. 또한 디노버 어셈블리 과정을 통해 새롭게 어셈블리된 시퀀스와 다른 유사 종과의 상동성 분석을 수행하여 어셈블리된 시퀀스에서의 유전자 영역 추출과 추출된 유전자의 기능을 예측한다.

• Pediatric Gastroenterology, Hepatology & Nutrition
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• 제10권2호
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• pp.166-172
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• 2007

목 적: 최근 HBsAb 및 HBcAb 양성인 공여자의 간이 식편을 이식 받은 수혜자에서 신생 B형 간염이 발생하는 것이 보고 되고 있으며, 저자들도 약 40%에서 신생B형 간염이 발생하는 것을 보고하였다. 한국인에서의 HBcAb 양성률은 50%가 넘는 것으로 보고하고 있는데, 이는 임상 간이식의 걸림돌이 될 수 있으며 저자들은 이를 예방하기 위한 일환으로써 본 연구를 시행하였다. 방 법: 1997년 11월부터 1998년 11월까지 12개월 동안 서울 아산병원에서 생체 간이식 공여자가 과거 B형간염과 C형 간염 감염의 증거가 없으면서 HBsAg 음성이면서 HBsAb 양성, HBcAb 양성인 성인 공여자 6명을 대상으로 하였다. 간이식 수술 시 동결 생검을 위하여 채취한 절편의 일부를 보관하여 실험에 사용하였다. 동결 절편 조직에서 DNA를 분리하여, HBV DNA의 표면 구역과 핵심 구역에 대한 시발체를 이용하여 이중 중합효소 연쇄 반응을 시행하여 검사를 시행하였다. 결 과: 공여자 6명의 조직에서 표면 구역이 모두 양성으로 관찰되었으며, 핵심 구역은 4명에서 양성으로 관찰되었다. 그 중 4명의 간을 이식받은 소아 수혜자는 모두 예방법을 시행하면서, 신생 B형 간염의 발생은 관찰되지 않고 있다. 결 론: 본 결과는 간이식 후 발생하는 신생 B형 간염의 원인으로 HBcAb 양성이 위험 인자임을 지지하고 있다. HBcAb 양성 공여자의 간이식편에서 핵심구역은 66%에서 양성으로 보여 이식 후 잠재 HBV 감염 혹은 신생 B형 간염의 발생을 막기 위해 예방적 치료가 필요할 것으로 사료된다.

• 한국환경독성학회:학술대회논문집
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• 한국환경독성학회 2000년도 추계심포지움 및 학술발표회:바이오모니터링 기법을 이용한 환경위해성 평가
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• pp.48-48
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• 2000

• Bulletin of the Korean Chemical Society
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• 제35권11호
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• pp.3377-3380
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• 2014

• 대한약학회:학술대회논문집
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• 대한약학회 2001년도 Proceedings of International Convention of the Pharmaceutical Society of Korea
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• pp.181.2-182
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• 2001

• 대한생식의학회:학술대회논문집
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• 대한불임학회 2003년도 제45차 추계학술대회
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• pp.81.2-82
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• 2003

• The Plant Pathology Journal
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• 제33권6호
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• pp.529-542
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• 2017

Control of plant diseases is largely dependent on use of agrochemicals. However, there are widening gaps between our knowledge on plant diseases gained from genetic/mechanistic studies and rapid translation of the knowledge into target-oriented development of effective agrochemicals. Here we propose that the time is ripe for computer-aided drug discovery/design (CADD) in molecular plant pathology. CADD has played a pivotal role in development of medically important molecules over the last three decades. Now, explosive increase in information on genome sequences and three dimensional structures of biological molecules, in combination with advances in computational and informational technologies, opens up exciting possibilities for application of CADD in discovery and development of agrochemicals. In this review, we outline two categories of the drug discovery strategies: structure- and ligand-based CADD, and relevant computational approaches that are being employed in modern drug discovery. In order to help readers to dive into CADD, we explain concepts of homology modelling, molecular docking, virtual screening, and de novo ligand design in structure-based CADD, and pharmacophore modelling, ligand-based virtual screening, quantitative structure activity relationship modelling and de novo ligand design for ligand-based CADD. We also provide the important resources available to carry out CADD. Finally, we present a case study showing how CADD approach can be implemented in reality for identification of potent chemical compounds against the important plant pathogens, Pseudomonas syringae and Colletotrichum gloeosporioides.