• Title/Summary/Keyword: $GI_{50}$

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Evaluation of Anticancer Activity of Curcumin Analogues Bearing a Heterocyclic Nucleus

  • Ahsan, Mohamed Jawed
    • Asian Pacific Journal of Cancer Prevention
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    • v.17 no.4
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    • pp.1739-1744
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    • 2016
  • We report herein an in vitro anticancer evaluation of a series of seven curcumin analogues (3a-g). The National Cancer Institute (NCI US) Protocol was followed and all the compounds were evaluated for their anticancer activity on nine different panels (leukemia, non small cell lung cancer, colon cancer, CNS cancer, melanoma, ovarian cancer, renal cancer, prostate cancer and breast cancer) represented by 60 NCI human cancer cell lines. All the compounds showed significant anticancer activity in one dose assay (drug concentration $10{\mu}M$) and hence were evaluated further in five dose assays (0.01, 0.1, 1, 10 and $100{\mu}M$) and three dose related parameters $GI_{50}$, TGI and $LC_{50}$ were calculated for each (3a-g) in micro molar drug concentrations (${\mu}M$). The compound 3d (NSC 757927) showed maximum mean percent growth inhibition (PGI) of 112.2%, while compound 3g (NSC 763374) showed less mean PGI of 40.1% in the one dose assay. The maximum anticancer activity was observed with the SR (leukemia) cell line with a $GI_{50}$ of $0.03{\mu}M$. The calculated average sensitivity of all cell lines of a particular subpanel toward the test agent showed that all the curcumin analogues showed maximum activity on leukemia cell lines with $GI_{50}$ values between 0.23 and $2.67{\mu}M$.

Digestive, Physical and Sensory Properties of Cookies Made of Dry-Heated OSA-High Amylose Rice Starch (변성 고아미 쌀전분을 이용한 쿠키의 소화율과 물리적 및 관능적 특성)

  • Han, Jung-Ah
    • Korean Journal of Food Science and Technology
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    • v.41 no.6
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    • pp.668-672
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    • 2009
  • Cookies containing wheat flour mixed with 10, 30 or 50% esterified with octenylsuccinic anhydride (OSA, 3%) and dry-heated ($130^{\circ}C$, 2 hr) high amylose rice (Goami 2) starch (DH-OSAR) were prepared and then their physical and digestive properties were evaluated. When the amount of added DH-OSAR increased, the hardness and brittleness of the cookies decreased, and L (brightness) value increased. For the digestive properties, the cookies containing 50% DH-OSAR significantly increased the amount of slowly digestible starch (SDS), and decreased the amount of rapidly digestible starch (RDS), resulting in the lowest expected Glycemic Index (eGI) among tested cookies. Although the cookies containing DHOSAR were inferior to the control, the addition of xanthan gum (0.5% based on total powder amount) significantly improved their textural and sensory properties. Specially, the cookies containing 50% DH-OSAR and the addition of 0.5% xanthan gum showed the lowest eGI value, maintaining the improved textural and sensory properties.

A chaperone surveillance system in plant circadian rhythms

  • Cha, Joon-Yung;Khaleda, Laila;Park, Hee Jin;Kim, Woe-Yeon
    • BMB Reports
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    • v.50 no.5
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    • pp.235-236
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    • 2017
  • The circadian clock is an internal system that is synchronized by external stimuli, such as light and temperature, and influences various physiological and developmental processes in living organisms. In the model plant Arabidopsis, transcriptional, translational and post-translational processes are interlocked by feedback loops among morning- and evening-phased genes. In a post-translational loop, plant-specific single-gene encoded GIGANTEA (GI) stabilize the F-box protein ZEITLUPE (ZTL), driving the targeted-proteasomal degradation of TIMING OF CAB EXPRESSION 1 (TOC1) and PSEUDO-RESPONSE REGULATOR 5 (PRR5). Inherent to this, we demonstrate the novel biochemical function of GI as a chaperone and/or co-chaperone of Heat-Shock Protein 90 (HSP90). GI prevents ZTL degradation as a chaperone and facilitates ZTL maturation together with HSP90/HSP70, enhancing ZTL activity in vitro and in planta. GI is known to be involved in a wide range of physiology and development as well as abiotic stress responses in plants, but it could also interact with diverse client proteins to increase protein maturation. Our results provide evidence that GI helps proteostasis of ZTL by acting as a chaperone and a co-chaperone of HSP90 for proper functioning of the Arabidopsis circadian clock.

After Hemorrhoidectomy Korean Medicine Treatment with Whidam's SuGi Therapy: A Case Report (치핵근치술 후 휘담식 수기요법을 병행한 한방관리 증례 1)

  • Hyungil Choi;Na Young Kim;Hun Mo Ahn
    • Journal of Korean Medical Ki-Gong Academy
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    • v.22 no.1
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    • pp.72-82
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    • 2023
  • Objective : The purpose of this study is to report about a 50's female patient after Hemorrhoidectomy, whose symptoms were relieved after Korean medicine treatment with Whidam's SuGi Therapy. Methods : The patient in this study received Korean medicine treatment such as herbal medication, acupuncture treatment, cupping therapy and specially Whidam's SuGi therapy. Results : After the treatment, the symptoms of pains were relieved. Vas fell from 9 to 2 and overall, the body condition has improved. Conclusions : This study showed that Whidam's SuGi therapy added with Korean Medicine treatment can be an effective choice for after Hemorrhoidectomy.