• Journal of Photoscience
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• v.9 no.2
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• pp.82-85
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• 2002

33kDa extrinsic protein, an important protein in oxygenic photosynthesis, was known to have no fixed configuration in solution. At 20$\^{C}$ and pH 6, 33kDa extrinsic protein showed changes of free energy of -14.6 kJ/mor$\^$-1/ and of standard volume of -120mL/mol, respectively, with increase of hydrostatic pressure, comparatively lower than for most proteins. NBS modification of Trp241 in 33kDa extrinsic protein dramatically changes the secondary protein structure, its affinity to photosystem II as well as photosynthetic oxygen evolution. The relationship between structural change and transport of oxygen, water and proton is deserved a further study.

• Asian Pacific Journal of Cancer Prevention
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• v.14 no.1
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• pp.449-452
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• 2013

Polymorphisms in DNA repair genes have been shown to influence DNA repair processes and to modify cancer susceptibility. Here we conducted a case-control study to assess the role of potential SNPs of DNA repair genes on the risk of glioma and meningioma. We included 297 cases and 458 cancer-free controls. Genotyping of XRCC1 Gln399Arg, XRCC1 Arg194Trp, XRCC2 Arg188His, XRCC3 Thr241Met, XRCC4 Ala247Ser, ERCC1 Asn118Asp, ERCC2 Lys751Gln and ERCC5 Asp1558His were performed in a 384-well plate format on the Sequenom MassARRAY platform. XRCC1 Arg194Trp (rs1799782) and ERCC2 Asp312Asn rs1799793 did not follow the HWE in control group, and genotype distributions of XRCC1 Gln399Arg rs25487, XRCC2 Arg188His rs3218536 and ERCC2 Asp312Asn rs1799793 were significantly different between cases and controls (P<0.05). We found XRCC1 399G/G, XRCC1 194 T/T and XRCC3 241T/T were associated with a higher risk when compared with the wild-type genotype. For ERCC5 Asp1558His, we found G/G genotype was associated with elevated susceptibility. In conclusion, our study has shown that XRCC1 Gln399Arg, XRCC1 Arg194Trp, XRCC3 Thr241Met and ERCC5 Asp1558His are associated with risk of gliomas and meningiomas. This finding could be useful in identifying the susceptibility genes for these cancers.

• Journal of Physiology & Pathology in Korean Medicine
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• v.24 no.2
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• pp.236-241
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• 2010

The purpose of this study was to investigate the mechanism of ethanol extract of Agrimonia pilosa Ledeb. (EAP)-reduced melanogenesis and diphenyl-picryl-hydrazyl (DPPH) radical scavenging activity. Agrimonia pilosa Ledeb., a perennial herbaceous plant, has been used as an antihemorrhagic, anthelminntic, and antiinflammatory agents in Chinese herbal medicine. In the present study, we observed that melanin synthesis and tyrosinase activity of B16F10 cells were significantly decreased by EAP. However, EAP could not suppress tyrosinase activity in the cell-free system, whereas kojic acid directly inhibited tyrosinase activity. Furthermore, EAP decreased the protein expression of tyrosinase, tyrosinase-related prootein 1 (TRP-1), and tyrosinase-related prootein 2 (TRP-2). EAP scavenged DPPH radical up to 41% with 100 ${\mu}g/m{\ell}$ concentration. These results suggest that the hypopigmentary effect of EPA was due to regulation of tyrosinase protein.

• Asian Pacific Journal of Cancer Prevention
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• v.13 no.9
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• pp.4413-4416
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• 2012

Aim: Individual differences in chemosensitivity and clinical outcome in non-small cell lung cancer (NSCLC) patients treatment with platinum-based chemotherapy may be due to genetic factors. Our study aimed to investigate the prognostic role of GSTP1, XRCC1 and XRCC3 in NSCLC patients treated with chemotherapy. Methods: A total of 460 cases were consecutively selected from The Affiliated Hospital of Nantong University between Jan. 2003 to Nov. 2006, and all were followed-up until Nov. 2011. Genotyping of GSTP1 Ile105Val, XRCC1 Arg194Trp, XRCC1 Arg399Gln and XRCC3 Thr241Met was conducted by duplex polymerase-chain-reaction with confronting-two-pair primer methods. Results: Patients with GSTP Val/Val exhibited a shorter survival time, and had a 1.89 fold greater risk of death than did those with the IIe/IIe genotype. For XRCC1 Arg194Trp, the variant genotype Trp/Trp was significantly associated with a decreased risk of death from NSCLC when compared with the Arg/Arg. Individuals carrying XRCC1 399Gln/Gln genotype had a longer survival time, with a lowered risk of death from NSCLC. Conclusion: This study indicated that GSTP1 Ile105Val, XRCC1 Arg194Trp and XRCC1Arg399Gln genes have a role in modifying the effect of platinum-based chemotherapy for NSCLC patients in a Chinese population. Our findings provide information for therapeutic decisions for individualized therapy in NSCLC cases.

• Journal of the Korean Applied Science and Technology
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• v.37 no.2
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• pp.241-249
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• 2020

This study investigated the whitening activity using seomaeyakssuk (Artemisia argyi H.) extract. Seomaeyakssuk was extracted from hot DW (AAD) and 70% ethanol (AAE). And confirmed safety through assessment of cytotoxicity. Also, whitening activities were measured through changes in the levels of extracellular melanin, melanin synthesis, cellular tyrosinase activity and transcription factor. The results confirmed that significant cytotoxicity does not appear in the concentration range of 50, 100, and 200 ㎍/㎖ of both extracts of this study. The production of extracellular melanin was slowed by AAD 45.0% and AAE 1.3% at 200 ㎍/㎖ concentration. Also, production of intracellular melanin was decreased AAD 37.2% and AAE 24.6%. In the case of intra cellular tyrosinase activity was reduced to AAD 49.2% and AAE 35.6% at 200 ㎍/㎖ concentration. The mRNA expression of tyrosinase, TRP-1 and TRP-2 significantly decreased by AAD 63.0%/AAE 58.0%, AAD 60.0%/AAE 56.0% and AAD 59.0%/AAE 53.0%, respectively, following the 200 ㎍/㎖ sample treatment when compared to the control. Both extracts showed efficient changes of production of whitening-related factor and transcription factor. But AAD was found to have a higher inhibitory effect than AAE. In other words, seomaeyakssuk was showed significant biological activities showing whitening without cytotoxicity. These results will be provided as fundamental data for further development of the new material of functional cosmetics to the results above.

• Proceedings of the SCSK Conference
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• 2003.09b
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• pp.241-242
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• 2003

The effects of N-acetylphytospingosine(NAPS), one of the phytospingosine derivatives, on melanogenesis of B 16F 1 0 mouse melanoma cell lines were investigated. We assessed the effect of NAPS on the depigmentation of B16F10 cells. The melanin content of cells was significantly reduced by NAPS. We examined the inhibitory effect of NAPS on tyrosinase activity using L-dopa as a substrate and the results showed that tyrosinase activity was inhibited in a does-dependent manner. The mRNA level of tyrosinase as well as that of tyrosinase related protein-l (TRP-l) and tyrosinase related protein-2 (TRP-2) genes were not affected by NAPS based on a reverse transcription-polymerase chain reaction (RT-PCR) assay. We also performed a Western blotting analysis using anti-tyrosinase antibody. It showed that there is no change in tyrosinase protein level after treatment of NAPS. These results suggest that the depigmenting mechanism of NAPS in B16F10 melanoma cells involves inhibition of melanosomal tyrosinase activity, rather than the mRNA expression or protein level of tyrosinase.