• Title/Summary/Keyword: ICB

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α-Isocubebene modulates vascular tone by inhibiting myosin light chain phosphorylation in murine thoracic aorta

  • Ye, Byeong Hyeok;Kim, Eun Jung;Baek, Seung Eun;Choi, Young Whan;Park, So Youn;Kim, Chi Dae
    • The Korean Journal of Physiology and Pharmacology
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    • 제22권4호
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    • pp.437-445
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    • 2018
  • ${\alpha}$-Iso-cubebene (ICB) is a dibenzocyclooctadiene lignin contained in Schisandra chinensis (SC), a well-known medicinal herb that ameliorates cardiovascular symptoms, but the mechanism responsible for this activity has not been determined. To determine the role played by ICB on the regulation of vascular tone, we investigated the inhibitory effects of ICB on vascular contractile responses by adrenergic ${\alpha}$-receptor agonists. In addition, we investigated the role on myosin light chain (MLC) phosphorylation and cytosolic calcium concentration in vascular smooth muscle cells (VSMC). In aortic rings isolated from C57BL/6J mice, ICB significantly attenuated the contraction induced by phenylephrine (PE) and norepinephrine (NE), whereas ICB had no effects on KCl (60 mM)-induced contraction. In vasculatures precontracted with PE, ICB caused marked relaxation of aortic rings with or without endothelium, suggesting a direct effect on VSMC. In cultured rat VSMC, PE or NE increased MLC phosphorylation and increased cytosolic calcium levels. Both of these effects were significantly suppressed by ICB. In conclusion, our results showed that ICB regulated vascular tone by inhibiting MLC phosphorylation and calcium flux into VSMC, and suggest that ICB has anti-hypertensive properties and therapeutic potential for cardiovascular disorders related to vascular hypertension.

ICB 회로의 제어에 관한 연구 (A Study on the Control of ICB Circuits)

  • 홍순찬;김규성
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1990년도 추계학술대회 논문집 학회본부
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    • pp.314-318
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    • 1990
  • This paper deals with the transient analyses of both the one-phase ICB circuit and the three-phase ICB circuit. During the transient switching intervals, overvoltages or voltage unbalances may be produced on the capacitors. The three-step and four-step transient switching sequences were discussed and compared on the basis of phase shifting. Also, simple control method using bang-bang control was proposed and the digital simulations were carried out. As the results, it is verified that the proposed control technique is efficient.

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새로운 이온화된 클라스터 빔원의 제작과 특성 조사 (Investigation of New Ionized Cluster Beam Source)

  • 고석근;장홍규;정형진;최원국
    • 한국진공학회지
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    • 제5권3호
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    • pp.251-257
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    • 1996
  • The present paper the results of development of first experimental tests of a new ionized cluster beam (ICB) source. The novelty of ICB source lies in the fact that the crucible and ionization parts are spaced in one cylincrical shell but are not divided inan electric circuit. The ICB source adapts permanent mannets to increase the ionixation efficiency. The maximum obtained Cu+ ion current density I s1.5μA/㎠ 이었으며, 증착율이 초당 0.4Å일 때 이온화율은 3% 이었으며, 증착율이 초당 0.2Å일때는 이온화율이 6%이었다. 증착율이 초당 0.2Å이고, 가속전압이 4kV에서는 Cu+ 이온빔의 균일성이 95%이상이었다.

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사람 태아 골모 세포에 대한 냉동 동종골과 근골격이식재의 골형성 유도에 관한 효과 (Effects of Irradiated Frozen Allogenic Bone and Musculoskeletal Transplant Foundation on Bone Formation in Human Fetal Osteoblasts)

  • 윤호상;피성희;윤형근
    • Journal of Periodontal and Implant Science
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    • 제36권2호
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    • pp.435-448
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    • 2006
  • The purpose of this study was to investigate the effects of ICB(Irradiated frozen allogenic bone, Rocky Mountain Tissue Bank, USA) and MTF(Decalcified freeze-dried bone allograft, Musculoskeletal Transplant Foundation, USA) on the cell proliferation and differentiation of human fetal osteoblasts. Human fetal osteoblasts (hFOB1) were cultured with $10\;ng/m{\ell}$of ICB and MTF. The negatvie control group was cultured with DMSO and positive control group was cultured with BMF ($2\;ng/m{\ell}$). MIT was performed to examine the viability of the cell, and alkaline phosphatase activity was analyzed to examine the mineralization. Calcium accumulation was also evaluated. ICB and MTF did not increase the rate of the cellular proliferation of hFOB1s while they enhanced ALP and calcium accumulation. The expression of osteocalcin (OC) and bone silaloprotein (BSP) increased in hFOB1 treated with ICB and MTF ($10\;ng/m{\ell}$). These results suggest that ICB and MTF stimulate osteoblastic activity of the hFOBl.

Dancing with the Surgeon: Neoadjuvant and Adjuvant Immunotherapies from the Medical Oncologist's Perspective

  • Sehhoon Park
    • Journal of Chest Surgery
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    • 제56권2호
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    • pp.67-74
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    • 2023
  • Perioperative treatment with conventional cytotoxic chemotherapy for resectable non-small cell lung cancer (NSCLC) has proven clinical benefits in terms of achieving a higher overall survival (OS) rate. With its success in the palliative treatment of NSCLC, immune checkpoint blockade (ICB) has now become an essential component of treatment, even as neoadjuvant or adjuvant therapy in patients with operable NSCLC. Both pre- and post-surgery ICB applications have proven clinical efficacy in preventing disease recurrence. In addition, neoadjuvant ICB combined with cytotoxic chemotherapy has shown a significantly higher rate of pathologic regression of viable tumors compared with cytotoxic chemotherapy alone. To confirm this, an early signal of OS benefit has been shown in a selected population, with programmed death ligand 1 expression ≥50%. Furthermore, applying ICB both pre- and post-surgery enhances its clinical benefits, as is currently under evaluation in ongoing phase III trials. Simultaneously, as the number of available perioperative treatment options increases, the variables to be considered for making treatment decisions become more complex. Thus, the role of a multidisciplinary team-based treatment approach has not been fully emphasized. This review presents up-to-date pivotal data that lead to practical changes in managing resectable NSCLC. From the medical oncologist's perspective, it is time to dance with surgeons to decide on the sequence of systemic treatment, particularly the ICB-based approach, accompanying surgery for operable NSCLC.

리더의 조직시민행동이 조직구성원들의 사람중심 시민행동과 스트레스에 미치는 영향: 리더-구성원 교환관계의 매개효과를 중심으로 (The effects of a Leader's organizational citizenship behavior(OCB) on subordinates' interpersonal citizenship behavior(ICB) and job stress: Leader-Member Exchange(LMX) as a mediating variable)

  • 문지영;이정훈
    • 한국산학기술학회논문지
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    • 제21권5호
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    • pp.230-239
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    • 2020
  • 본 연구의 목적은 리더의 조직시민행동이 조직구성원들의 사람중심 시민행동과 직무 스트레스에 미치는 영향을 검증하는 것이다. 리더의 조직시민행동은 리더의 변화주도행동, 충성심 및 근면함 등으로 구성된다. 우리는 리더-구성원 교환관계(LMX)가 리더의 조직시민행동과 부하들의 사람중심 시민행동 및 직무 스트레스 관계를 매개하는지 가설을 설정하였다. 우리는 다양한 기업에서 근무하는 293명의 종업원들을 대상으로 2019년 9월부터 11월까지 설문지를 수집하여 연구모형을 검증하였다. 우리는 확인적 요인분석을 수행하였고 구조방정식모형을 사용하여 데이터를 분석하였다. 또한 우리는 리더의 조직시민행동 문항에 대해서 3요인 모형의 적합성을 평가하려고 확인적 요인분석을 실시하였다. 실증 분석결과에 의하면, 리더-구성원 교환관계(LMX)가 리더의 조직시민행동이 부하들의 사람중심 시민행동과 직무 스트레스 관계를 완전 매개하였다. 리더의 조직시민행동은 리더-구성원 교환관계에 정(+)의 영향을 미친다. 그리고 리더-구성원 교환관계는 조직구성원의 사람중심 시민행동에 정(+)의 영향을 미치고 직무 스트레스에 부(-)의 영향을 미친다. 우리는 리더의 조직시민행동이 조직구성원들의 사람중심 시민행동에 정(+)의 관계가 있고 직무 스트레스에 부(-)의 관계가 있으며 이 관계에서 리더-구성원 교환관계가 매개한다는 가설을 입증하였다. 우리는 연구의 한계점과 시사점 및 향후 연구를 제시하였다.

실리콘 기판 위에 UHV-ICB 증착법으로 적층 성장된 $Y_2O_3$박막의 BS/channeling 연구 (BS/channeling studies on the heteroepitaxially grown $Y_2O_3$ films on Si substrates by UHV-ICB deposition)

  • 김효배;조만호;황보상우;최성창;최원국;오정아;송종한;황정남
    • 한국진공학회지
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    • 제6권3호
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    • pp.235-241
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    • 1997
  • 실리콘 기판위에 초고진공 Ionized Cluster Beam(UHV-ICB)증착법으로 적층 성장시 킨 $Y_2O_3$ 박막의 결정성 및 구조를 Backscattering Spectroscopy(BS)/channeling을 이용하여 분석하였다. 현재까지 타증착법에 의해 성장된 $Y_2O_3$박막의 channeling 최소수율은 0.8~0.95 로 거의 비정질이거나 다결정이었다. 이에 반해 UHV-ICB법으로 Si(100), Si(111) 기판 위에 적층 성장시킨 $Y_2O_3$ 박막의 channeling 최소수율은 각각 0.28, 0.25로 UHV-ICB법으로 성장 시킨 $Y_2O_3$박막이 타증착법으로 성장시킨 박막보다 상대적으로 우수한 결정성을 지니고 있 었다. 또한 실리콘 기판의 방향에 관계없이 $Y_2O_3$박막의 표면 영역이 계면 영역보다 결정성 이 좋았다. Si(111) 위에 적층 성장한 Y2O3박막은 실리콘 결정과 $0.1^{\circ}$어긋나서 (111)면으로 성장하였고, Si(100) 위에 적층 성장한 $Y_2O_3$박막은 실리콘 결정과 평행하게 double domain 구조를 지닌 (110)면으로 성장하였다. 산소공명 BS/channeling 결과 Si(111) 위에 적층 성장 한 $Y_2O_3$박막의 산소는 결정성을 갖고 있으나 Si(100) 위에 적층 성장한 $Y_2O_3$박막의 산소는 random하게 분포하고 있음을 확인하였다.

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