• 대한감각통합치료학회지
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• 제13권1호
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• pp.33-43
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• 2015

목적 : 감각통합접근 부모교육 프로그램이 발달지체 아동의 감각처리능력에 대한 부모의 이해도에 미치는 효과를 알아보았다. 연구 방법 : 연구 대상자는 발달지체 아동의 부모 30명으로, 연구 기간은 2015년 3월 15일부터 동년 5월 10일까지이었다. 실험군과 대조군은 임의로 배정하였고, 실험군 15명에게는 감각통합접근 부모교육을 1:1로 집중적으로 시행하였다. 대조군 15명에게는 중재를 실시하지 않았다. 아동의 감각처리능력에 대한 부모의 이해도 변화는 단축감각프로파일(Short Sensory Profile: SSP)과 부모의 이해도 설문지로 측정하였다. 집단 간 치료 효과는 독립표본 t-검정을 사용하여 분석하였고, 집단 내 치료 전후의 효과는 대응표본 t-검정을 사용하였다. 결과 : 단축감각프로파일의 총점은 통계적으로 유의미하게 낮아졌으며 부모의 이해도 설문지의 총점은 높아졌다. 이를 통해 감각통합접근 부모교육 프로그램이 발달지체 아동의 감각처리능력에 대한 부모의 이해도를 변화시킬 수 있는 효과 있는 중재방법임을 알 수 있었다. 결론 : 본 연구는 장애아동을 대상으로 감각통합치료를 제공하는 치료사들에게 아동의 감각처리능력에 대한 부모의 이해도를 높일 수 있는 부모교육 프로그램으로서 좋은 모델을 제시할 수 있을 것이다.

• International Journal of Oral Biology
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• 제32권4호
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• pp.119-125
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• 2007

Dlx3 is a homeodomain protein and is known to play a role in development and differentiation of many tissues. Deletion of four base pairs in DLX3 (NT3198) is causally related to tricho-dento-osseous (TDO) syndrome (OMIM #190320), a genetic disorder manifested by taurodontism, hair abnormalities, and increased bone density in the cranium. The molecular mechanisms that explain the phenotypic characteristics of TDO syndrome have not been clearly determined. In this study, we examined phenotypic characteristics of wild type DLX3(wtDlx3) and 4-BP DEL DLX3 (TDO mtDlx3) in C2C12 cells. To investigate how wtDlx3 and TDO mtDlx3 differentially regulate osteoblastic differentiation, reporter assays were performed by using luciferase reporters containing the promoters of alkaline phosphatase, bone sialoprotein or osteocalcin. Both wtDlx3 and TDO mtDlx3 enhanced significantly all the reporter activities but the effect of mtDlx3 was much weaker than that of wtDlx3. In spite of these differences in reporter activity, electrophoretic mobility shift assay showed that both wtDlx3 and TDO mtDlx3 formed similar amounts of DNA binding complexes with Dlx3 binding consensus sequence or with ALP promoter oligonucleotide bearing the Dlx3 binding core sequence. TDO mtDlx3 exhibits a longer half-life than wtDlx3 and it corresponds to PESTfind analysis result showing that potential PEST sequence was missed in carboxy terminal of TDO mtDlx3. In addition, co-immunoprecipitation demonstrated that TDO mtDlx3 binds to Msx2 more strongly than wtDlx3. Taken together, though TDO mtDlx3 acted as a weaker transcriptional activator than wtDlx3 in osteoblastic cells, there is possibility that during in vivo osteoblast differentiation TDO mtDlx3 may antagonize transcriptional repressor activity of Msx2 more effectively and for longer period than wtDlx3, resulting in enhancement of osteoblast differentiation.

• 한국응용곤충학회지
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• 제46권3호
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• pp.393-399
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• 2007

팥의 주요해충종인 팥나방(Matsumuraeses phaseoli (Matsumura))과 콩명나방(Maruca vitrata (Fabricius)(syn. M. testulalis)에 대한 인공사료를 이용한 실내 사육 조건(온도 $25^{\circ}C$, 상대습도 60%)에서 기초적인 발육특성이 조사되었다. 팥나방은 16L/8D, 콩명나방에는 13L/11D의 광조건이 제공되었다. 두 곤충종 모두 유충 영기는 두폭이 뚜렷한 불연속 생장을 보이면서 5령을 경과하였다. 팥나방은 알기간, 유충기간, 용기간이 각각 3.9일, 약 16일, 8.9일이었고 유충의 용화율은 80% 이상이었고, 대부분의 번데기가 우화하였다. 갓산란된 알을 섭씨 5도에서 15일 보관할 때 50% 이상이 부화하였다. 콩명나방의 발육도 팥나방과 비슷한 성질을 보였다. 그러나 콩명나방 갓산란된 알이 저온보관된 경우에는 전혀 부화하지 못하였다.

• 대한감각통합치료학회지
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• 제22권1호
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• pp.25-42
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• 2024

목적 : 감각통합중재와 가족중심코칭 병행중재가 발달지연 아동의 감각처리, 자세조절과 부모의 양육효능감에 미치는 영향에 대해 알아보고자 하였다. 연구방법 : 본 연구는 5~6세 발달지연 아동 4명과 부모를 대상으로 단일대상연구 대상자간 중다 간헐 기초선 설계로 진행하였으며, 단일대상연구 대상자간 중다 간헐 기초선 설계로 진행하였으며, 감각통합중재와 가족중심코칭은 대상자별로 각 8주간 주 2회씩 총 16회기 동안 시행하였다. 사전과 사후에 감각프로파일, 한국판부모 양육효능감 평가를 실시하였고, Biorescue 장비를 사용하여 중재 후 자세조절의 변화를 측정하였다. 결과 : 중재 후 대상자 모두 감각처리가 상승하였다. Biorescue 장비를 통해 평가한 중재 기간에 앉은 자세, 눈 감고 앉은 자세, 선 자세에서 체중지지가 기초선 기간의 ±2 표준편차보다 높게 나타났다. 모든 대상자의 주 양육자 부모의 양육효능감이 상승되었다. 결론 : 본 연구의 결과를 통해 감각통합중재와 가족중심코칭이 발달지연 아동의 감각처리, 자세조절, 부모의 양육효능감에 효과적인 중재 방법을 제시하였다는 점에 의의가 있다.

• 한국산업보건학회지
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• 제23권3호
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• pp.273-286
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• 2013

Objectives: The present study was conducted in order to investigate the reproductive toxicity in rats exposed to 1,4-dichlorobutane. Methods: The test chemical was administered orally at 0, 8.3, 50 and 300 mg/kg/day. Males were administered daily for 10 weeks prior to the mating period. Females were administered from between two weeks before mating to the 21stday of lactation. Results: In both sexes, a decrease in body weight and an increase in the weights of the liver and kidneys were observed. In males, discoloration of the liver, hepatocyte hypertrophy and mineralization in the kidneys were observed. In females, animal deaths, dystocia and pup deaths due to maternal dysfunction were observed. In F1 animals of both sexes, a decrease in body weight was observed at 300 mg/kg/day. An increase in the weights of the liver in both sexes, mineralization in the kidneys of males, animal deaths, hepatocyte hypertrophy and pup deaths due to maternal dysfunction were observed at 50 mg/kg/day. Mineralization in the kidneys of males was observed at 8.3 mg/kg/day. Therefore, the no-observed-adverse-effect levels (NOAELs) of 1,4- dichlorobutane were considered to be under 8.3 mg/kg/day for males, 8.3 mg/kg/day for females, more than 300 mg/kg/day for fertility in both sexes, 8.3 mg/kg/day for maternal functions and 50 mg/kg/day for F1 offspring. The absolute toxic dose was believed to be 8.3 mg/kg/day for males, 50 mg/kg/day for females, 50 mg/kg/day for maternal functions and 300 mg/kg/day for F1 offspring. However NOAEL for fertility could not be determined since there were no treatment-related changes. Conclusions: Under the present experimental conditions, 1,4-dichlorobutane is a Category 1B Reproductive Toxicant (presumed human reproductive or developmental toxicant).

• 한국발생생물학회지:발생과생식
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• 제17권4호
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• pp.321-327
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• 2013

The innate immune system is the only defense weapon that invertebrates have, and it is the fundamental defense mechanism for fish. The innate immune response is important in newly hatched flounders because it is closely involved in the initial feeding phase, which is why it is essential for survival during the juvenile period. The expression analysis of genes involved in the innate immune response in the olive flounder (Paralichthys olivaceus) in the days after hatching is incomplete. Therefore, we have begun to examine the expression patterns of genes specifically induced during the development of the innate immune system in newly hatched flounders. Microscopic observation showed that pronephron formation corresponded with the expression of perforin-encoding gene. These results suggest that perforin plays a vital role in the innate immunity of the kidney during developmental stages. Perforin expression was strong at the start of the development of the innate immune response, and continued throughout all the development stages. Our findings have important implications with respect to perforin's biological role and the evolution of the first defense mechanisms in olive flounder. Further studies are required to elucidate the perforin-mediated innate immunity response and to decipher the functional role of perforin in developmental stages.

• 한국발생생물학회지:발생과생식
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• 제16권4호
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• pp.301-307
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• 2012

Olive flounder Paralichthys olivaceus is one of the most widely cultured fish species in Korea. Although olive flounder receive attention from aquaculture and fisheries and extensive research has been conducted eye morphological change in metamorphosis, but little information was known to molecular mechanism and gene expression of eye development- related genes during the early part of eye formation period. For the reason of eyesight is the most important sense in flounder larvae to search prey, the screening and identification of expressed genes in the eye will provide useful insight into the molecular regulation mechanism of eye development in olive flounder. Through the search of an olive flounder DNA database of expressed sequence tags (EST), we found a partial sequence that was similar to crystallin beta A1 and gamma S. Microscopic observation of retinal formation correspond with the time of expression of the crystallin beta A1 and gamma S gene in the developmental stage, these result suggesting that beta A1 and gamma S play a vital role in the remodeling of the retina during eye development. The expression of crystallin beta A1 and gamma S were obviously strong in eye at all tested developing stage, it is also hypothesized that crystallin acts as a molecular chaperone to prevent protein aggregation during maturation and aging in the eye.

• 한국발생생물학회지:발생과생식
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• 제18권3호
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• pp.139-143
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• 2014

Different with other fishes, the guppies (Poecilia reticulata) is ovoviviparity, which retain their fertilized eggs within the follicle throughout gestation. The synchronously growing diplotene oocytes store nutrients in droplets and yolk, before their maturation and fertilization. The lecithotrophic strategy of development entails the provisioning of embryos with resources from the maternal yolk deposit rather than from a placenta, it allows the extracorporeal culture of guppy embryo. Studies on their early development of live bearers like the guppy including lineage tracing and genetic manipulations, have been limited. Therefore, to optimize conditions of embryo in vitro culture, explanted embryos from pregnant females were incubated in embryo medium (L-15 medium, supplemented with 5, 10, 15, 20% fetal bovine serum, respectively). We investigated whether the contents of FBS in vitro culture medium impact the development of embryos, and whether they would hatch in vitro. Our study found that in 5% of FBS of the medium, although embryos developed significantly slower in vitro than in the ovary, it was impossible to exactly quantify the developmental delay in culture, due to the obvious spread in developmental stage within each batch of eggs, and embryos can only be maintained until the early-eyed. And although in culture with 20% FBS the embryos can sustain rapid development of early stage, but cannot be cultured for the entire period of their embryonic development and ultimately died. In the medium with 10% and 15% FBS, the embryos seems well developed, even some can continue to grow after follicle ruptures until it can be fed. We also observed that embryonic in these two culture conditions were significantly different in development speed, in 15% it is faster than 10%. But 10% FBS appears to be more optimizing condition than 15% one on development process of embryos and survival rate to larvae stage.

• Reproductive and Developmental Biology
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• 제30권4호
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• pp.235-245
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• 2006

Di-n-butyl phthalate (DBP), diisononyl phthalate (DINP) and di-(2-ethylhexyl) adipate (DEHA) are ubiquitously distributed chemicals that are widely used as plasticizers and also found at low levels in foods. The aims of this study were to determine whether perinatal exposure to DBP, DINP and DEHA could alter normal patterns of neonatal development. Dams were provided with pulverized soy-free diet containing 20, 200, 2,000 and 10,000 ppm of DBP, 40, 400, 4.000 and 20,000 ppm of DINP, or 480, 2,400 and 12,000 ppm of DEHA from gestational day 15 to postnatal day 21. Exposure to the high doses of DBP, DINP and DEHA during gestational period significantly decreased food consumption and body weight gain of dams. These chemicals reduced neonatal body weight as well as that of the after maturation. Also, exposure to DINP of all the doses used and the higher doses (2,400 and 12,000 ppm) of DEHA decreased AGD at PND 1 in male neonates, though that to DBP did not affect AGD in males. In female neonates, an increase in AGD was observed in DBP- and DINP-exposed animals at the highest doses. Moreover, these chemicals affected survival rate of pups at PND 5, and delayed onset of eye opening in all chemica1-exposed groups at PND 17. These results suggest that perinatal exposure to these chemicals may affect the normal development and/or growth of offspring.

• 한국가금학회지
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• 제21권3호
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• pp.175-182
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• 1994

An experiment was conducted to establish a large scale production method of anti-serum against chicken IgM and to profile the developmental changes of serum IgM levels during the feeding period(from hatching to 7 weeks of age) in broiler chicks. Blood samples were taken from Hubbard chicken at the age of hatching, three days of age, and weekly thereafter till to 7 weeks of age. The pure IgM was isolated from ammonium sulfate treated chicken serum by both sephadex G-200 and sepharose CL-6B chromatography. The breaking-through peak containing IgM appeared from the fraction 26 to 28. These fractions consisted mainly of IgM when tested by anti-chicken IgM(Nordic, Netherlands). Immunized with the heavy chain of this purified IgM, the rabbit immune sera(anti-chicken IgM) were formed a reaction only with the purified chicken IgM. The quantitative assay of serum IgM were carried by RID method. The optimal time for diffusion was 14 hours and the coefficient of determination($R^{2}$) for regression equation of standard curve was 0.992. It was observed that IgM concentrations were the highest at hatching(3.23 mg /mL), after that decreased gradually. From 2 to 5 weeks of age the levels unchanged(2.0 ~ 2.3mg /mL), and gradually decreased to 7 weeks of age(1.3 mg /mL).