• 제목/요약/키워드: lipid nanoparticle

검색결과 27건 처리시간 0.024초

새로운 미백물질을 함유하는 SLN의 제조와 봉입효율에 관한 연구 (Study on Encapsulation Efficiency and Preparation of SLN Using Conjugated New Whitening Agent(LA-PEG) and Its Cosmetic Application)

  • 강기춘;표형배;이청희;김태훈;마상철;임원철;정노희
    • 대한화장품학회지
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    • 제34권1호
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    • pp.15-23
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    • 2008
  • 본 연구는 유용성 물질 포집에 효과적인 solid lipid nanoparticle(SLN)을 이용하여 수용성물질인 LA-PEG을 새로운 제조방법에 응용하여 실험하였다. 지질로 사용된 오일은 coconut oil, macadamia oil, 그리고 jojoba oil 3가지로 이들의 특징은 생분해성이 강하다. 외부유화제로는 Tween 20, Tween 60을 이용하여 T-SLN을 제조하였으며, SLN의 입자 분포를 비교 분석한 결과 coconut oil을 지질로 하여 사용한 것이 크기가 가장 작았으며 사용한 계면활성제의 양에 따라 입자크기와 분포형태가 달라졌다. 1%의 Tween 60과 macadamia oil을 이용한 베이스가 입자크기가 가장 컸다. 방출관찰결과 coconut oil을 지질로 한 2%의 Tween 20의 베이스가 가장 늦게 방출되었고, 가장 빠른 방출한 것은 Tween 60 2% 베이스였다.

Chitosan and Its Derivatives for Gene Delivery

  • Lee, Knen-Yong
    • Macromolecular Research
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    • 제15권3호
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    • pp.195-201
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    • 2007
  • Non-viral vectors, including lipid- or polymer-based systems, have attracted much attention to date as a gene delivery vehicle, due to safety issues with viral vectors. Chitosan, a naturally existing cationic polymer, has shown great potential as a gene delivery carrier, as it has low immunogenicity and toxicity, excellent transcellular transport ability, and is relatively easy to chemically modify. This review summarizes and discusses the general features of chitosan and its applications as a delivery carrier of DNA and RNA.

미백성분이 포함된 나노입자의 제조와 응용 (Preparation and Application of Wnitening Ingredient Entrapped in Solid Lipid Nanoparticle [SLN])

  • 한성철;김연주;이기영;김동운
    • KSBB Journal
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    • 제19권3호
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    • pp.178-186
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    • 2004
  • 복합한방 재료인 옥용산에 대해 UV 흡수능, tyrosinase 저해활성 그리고 free radical 소거활성을 측정함으로서 미백활성을 검정하고 비교 시험군으로서 비타민C와 함께 Eudragit 이 코팅된 coconut oil을 이용한 SLN을 제조할 수 있었다. 실험 결과, 옥용산은 UV 영역에서 흡수능을 가지며 tyrosinase 저해 활성과 free radical 소거활성을 가진 것으로 확인되었다. 제조된 E-SLN을 TEM을 이용하여 관찰한 결과 크기 50∼300 nm인 구형의 양호한 입자를 형성하고 있음을 확인하였다. 또한 그 크기분포와 캡슐화 효율 분석을 통해 EUD의 농도가 2.0% (w/v), w/o 비율은 1 : 9, emulsion과 pour solution의 비율은 1 : 10, 그리고 실온에서 제조한 E-SLN의 캡슐화 효율이 가장 높고 크기의 분포가 가장 양호한 것을 알 수 있었다. E-SLN을 이용하여 in vitro 방출시험을 실시한 결과 E-SLN은 pH와 온도 의존적으로 약물을 방출하는 경향을 나타냈다. 결과적으로 제조된 E-SLN은 pH와 온도 의존적으로 약물을 전달할 필요가 있는 계에 대한 약물전달 시스템으로 적합할 것으로 보인다. 폐쇄 첩포시험과 자외선 조사에 의한 인공색소침착과 시료도포에 의한 미백효능 판정에 의한 임상시험 결과 옥용산과 비타민C, 그리고 이를 포함하는 E-SLN은 대조군의 경우와 비교하여 미백효과를 가지는 것으로 확인되었으며 이는 기능성화장품에의 응용 가능성을 높여주었다.

SIMS Protein imaging with nanoparticle tagged antibody for simultaneous omic imaging

  • 이선영;문대원
    • 한국진공학회:학술대회논문집
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    • 한국진공학회 2015년도 제49회 하계 정기학술대회 초록집
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    • pp.230.1-230.1
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    • 2015
  • One of the major problems of biological ToF-SIMS imaging is the lack of protein and peptide imaging. Most of biological story telling is mianly based on proteins. The biological implication of lipid ToF-SIMS imaging would be much higher if protein imaging is provided together. Utilizing high secondary ion yields of metals, proteins can be ToF-SIMS imaged with nanoparticle tagged proteins. Nanoparticles such as Fe3O4, SiO2, PbS were used for imaing NeuN, MCH, Orexin A, ${\alpha}$ synucline, TH(Tryosine Hydroxylase) in mouse tissues with a spatial resolution of ${\sim}2{\mu}m$ using a TOF-SIMS. Lipids and neurotransmitters images obtained simultaneously with protein images were overlayed for more deeper understanding of neurobiology, which is not allowed by any other bioimaging technqiues. The protein images from TOF-SIMS were compared with confocal fluorescence microscopy and NanoSIMS images. A new sample preparation method for imaging single cell membranes in a tissue using the vibrotome technique to prepare a tissue slice without any fixation and freeze drying will be also presented briefly for Hippocampus and Hypothalamus tissues.

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Effects of Supplementing Vitamin E and Nanoparticle-Sized Vitamin E on Growth Performance, Blood Profile, and Meat Quality in Broilers

  • Seyeon Chang;Hanjin Oh;Jaewoo An;Dongcheol Song;Hyunah Cho;Sehyun Park;Kyeongho Jeon;Sanghun Park;Yunhwan Park;Gyutae Park;Sehyuk Oh;Nayoung Choi;Jungseok Choi;Jinho Cho
    • 한국가금학회지
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    • 제50권1호
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    • pp.63-72
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    • 2023
  • This study was conducted to investigate the effect of vitamin E and nanoparticle-sized vitamin E (NVE) in a broiler diet on growth performance, blood profiles, and meat quality. A total of 45 one-day-old Arbor Acres broilers (initial body weight of 37.00 ± 0.41 g) were used in this experiment for 28 days. All broilers were randomly allocated into three dietary treatments in a randomized complete block design. The dietary treatments were as follows: a basal diet (CON), a basal diet supplementing with 380 mg/kg of vitamin E (T1), and a basal diet supplementing with 380 mg/kg of NVE (T2). Each treatment had five replicates with three birds per cage. On days 0-7, the T1 and T2 groups significantly increased (P<0.05) body weight gain compared to the CON group. Also, the T1 and T2 groups significantly increased (P<0.05) vitamin E content in blood and breast meat compared to the CON group. In shearing force, the T2 group showed a lower tendency (P=0.070) than the CON group. The T1 group showed a higher tendency (P=0.086) in the b* (yellowness) value than the T2 group. On day 7 after the end of the experiment, the T2 group significantly decreased (P<0.05) TBA values compared to the CON group. In conclusion, supplementation with vitamin E or NVE can improve broiler growth performance in the starter period, reduce TBA value through the antioxidant action of vitamin E, prevent lipid oxidation, and improve shelf life.

Preparation of Eudragit coated solid lipid nanoparticles (SLN) for hydrophilic drug delivery

  • Han, Sung-Chul;Yoon, Hee-Sun;Lee, Ki-Young;Kim, Yeon-Zu;Kim, Dong-Woon
    • 한국생물공학회:학술대회논문집
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    • 한국생물공학회 2003년도 생물공학의 동향(XIII)
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    • pp.655-659
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    • 2003
  • 수용성 약물의 캡슐화 효율을 높이기 위하여 eudragit이 코팅된 SLN을 제조하였고 TEM을 이용하여 그 형태가 양호하게 형성된 것을 확인하였다. DLS를 이용하여 형성된 입자의 분포와 크기를 확인하였으며 옥용산을 포함하는 E-SLN은 ${\pm}180$ nm, ascorbic acid는 ${\pm}150$ nm의 크기를 가지는 것으로 확인되었다. 캡슐화 효율은 옥용산을 경우 41%, ascorbic acid는 33%로 나타났으며, 이는 E-SLN이 수용성 약물을 캡슐화하는 데 유용함을 보여준다.

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7-디하이드로콜레스테롤을 함유한 키토산 코팅 처리 Solid Lipid Nano-particle의 개발에 관한 연구 (Development of Chitosan Coated Solid Lipid Nano-particles Containing 7-Dehydrocholesterol)

  • 이근수;김태훈;이천일;표형배;최태부
    • 대한화장품학회지
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    • 제31권2호
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    • pp.141-146
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    • 2005
  • 불안정한 생리활성물질들은 외부 환경에 의해 빠르게 분해된다. 그러므로 이러한 물질들을 안정화시키기 위한 캡슐화 기술은 매우 중요하다. 비타민 $D_3$의 전구체인 7-디하이드로콜레스테롤(7-DHC)은 일반인의 표피 각화세포에서 열충격 단백질(Heat Shock Protein)의 발현을 단백질과 mRNA의 수준에서 증가시키는 것으로 알려졌다. 하지만 7-DHC의 국소용 피부 제제로의 이용은 낮은 용해도와 화학적 불안정성 때문에 이용이 제한되었다. 본 연구에서 7-DHC는 나노에멀젼(NE), 고형 지질 나노 입자 (SLN) 그리고 키토산이 코팅된 고형 지질 나노 입자(CASLN)에 봉입하였다. NE와 SLN은 지질의 용융점 이상의 온도에서 고압의 호모제나이져를 통과시켜 제조하였다. CASLN은 SLN 분산액에 키토산을 용액을 첨가하여 제조하였으며 양(+)의 제타전위를 나타내었다. NE, SLN, CASLN 속에서 7-DHC의 안정도를 각각의 온도조건에서 시간의 경과에 따라 확인하였다. 열분석과 X선 회절 분석은 지질의 결정화 정도를 확인하기 위해서 수행하였다. 그 결과, CASLN은 기존의 SLN보다 불안정한 7-DHC를 효과적으로 봉입함으로서 안정성을 개선시켰다.

Recombinant Human Epidermal Growth Factor (rhEGF)-loaded Solid Lipid Nanoparticles: Fabrication and Their Skin Accumulation Properties for Topical rhEGF Delivery

  • Hwang, Hee-Jin;Han, Sunhui;Jeon, Sangok;Seo, Joeun;Oh, Dongho;Cho, Seong-Wan;Choi, Young Wook;Lee, Sangkil
    • Bulletin of the Korean Chemical Society
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    • 제35권8호
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    • pp.2290-2294
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    • 2014
  • For the present study, rhEGF was encapsulated into solid lipid nanoparticles (SLNs). The SLNs were prepared by the $W_1/O/W_2$ double emulsification method combined with the high pressure homogenization method and the physical properties such as particle size, zeta-potential and encapsulation efficiency were measured. The overall particle morphology of SLNs was investigated using a transmission electron microscopy (TEM). The percutaneous skin permeation and accumulation property of rhEGF was evaluated using Franz diffusion cell system along with confocal laser scanning microscopy (CLSM). The mean particle size of rhEGF-loaded SLNs was $104.00{\pm}3.99nm$ and the zeta-potential value was in the range of -$36.99{\pm}0.54mV$, providing a good colloidal stability. The TEM image revealed a spherical shape of SLNs about 100 nm and the encapsulation efficiency was $18.47{\pm}0.22%$. The skin accumulation of rhEGF was enhanced by SLNs. CLSM image analysis provided that the rhEGF rat skin accumulation is facilitated by an entry of SLNs through the pores of skin.

Membrane Penetration and Translocation of Nanoparticles

  • 신동주;현정인;심은지
    • EDISON SW 활용 경진대회 논문집
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    • 제2회(2013년)
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    • pp.139-151
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    • 2013
  • Understanding interactions between nanoparticles and lipid bilayer membranes is of great importance due to the potential applications in bio-nanotechnology such as drug deliveries, carrying genes, and utilization of integral membrane proteins. To investigate the dynamics of nanoparticle penetration and translocation into membranes, we performed dissipative particle dynamics simulations which use simple and intuitive coarse-grained models yet effectively describe hydrodynamic interactions in cell environment. We discuss the influence of the shape of nanoparticles as well as the properties of membranes including large membrane-embedded proteins that are found to significantly affect orientation of nanoparticles within membranes and, in turn, the minimum force required to translocate nanoparticles.

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Topical delivery of smad3 antisense using cationic solid lipid nanoparticle(SLN): therapeutic potential use and prevention of keloids

  • Jin, Su-Eon;Park, Jeong-Sook;Kim, Chong-Kook
    • 대한약학회:학술대회논문집
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    • 대한약학회 2003년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.2-2
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    • pp.248.1-248.1
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    • 2003
  • Keloids are characterized by abnormal proliferation of fibroblasts and overproduction of collagen. Recently, it is reported that transforming growth factor beta (TGFb) and its signaling molecule, SMAD3 are related to the mitogenic effect of fibroblasts and a stimulatory factor for collagen synthesis. Cationic SLN was developed to improve the complex formation of DNA/SLN and enhance the uptake efficiency to cells. SLN was formulated by DC-Chol, DOPE, trimyristin as a solid core and other surfactant. The physical properties of the SLN and the ATS-SLN complex were characterized. (omitted)

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