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Luo D, Pan T. SU-D-217A-06: Impact of Anterior-Posterior (AP) and Posterior-Anterior (PA) Scout Scans on the CT Radiation Dose in the Whole Body PET/CT Scan. Med Phys 2012; 39:3621. [PMID: 28517389 DOI: 10.1118/1.4734703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
PURPOSE CT can contribute over 50% of radiation dose in the whole body (WB) PET/CT scan. Tube current modulation (TCM) is a standard technique for reducing CT radiation dose to the patient by changing the tube current with the patient size, and is controlled by a very low-dose scoutscan, which assumes the patient is positioned at the center of the CT gantry opening. However, most patients are not positioned at the center due to practicality or to avoid claustrophobic or to reduce time of radiation exposure from the patient to the technologist. We study the impact of the AP and PA scout scans to the patient radiation exposure from CT. METHODS Ina retrospective study of 200 patients, each received two WB PET/CT scans: one with AP, and the other one with PA. The helical CT with TCM and PET acquisitions were identical in both scans. Separation of the two scans was about 10 months in average. The scans were performed on four GE PET/CT scanners: three 16- and one 64-slice with the same TCM settings. The 200patients were selected for the same scan coverage and similar body weight (difference = 3 kg). The tube current in each slice and average exposure tothe patient were recorded and compared. RESULTS The AP scout caused lower radiation dose on 94% of the patients. Both the tube current, and radiation exposure were reduced by 46±30 mA and 1.6±1.0 mGy, respectively. The effective radiation dose is reduced by 1.7±1.2 mSv. These results were statistically significant (p<0.00001). CONCLUSIONS The AP scout caused significantly less radiation dose than the PA scout in the CT scan of the whole-body PET/CT scan. Care should be taken to select theorientation of the scout scan to achieve appropriate radiation exposure to the patient when TCM is applied.
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Yuan B, Ren J, Zhao M, Luo D, Gu L. Effects of limited enzymatic hydrolysis with pepsin and high-pressure homogenization on the functional properties of soybean protein isolate. Lebensm Wiss Technol 2012. [DOI: 10.1016/j.lwt.2011.12.001] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Yin ZQ, Xu JL, Song GX, Zhou BR, Lu Y, Li X, Luo D. Active skin immunoreactions lead to significant epidermal Langerhans cells reduction in facial malignant and premalignant skin tumours. J Eur Acad Dermatol Venereol 2012; 27:526-7. [PMID: 22540415 DOI: 10.1111/j.1468-3083.2012.04557.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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154
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Luo D, Dai HT, Demir HV, Sun XW, Yang HZ, Ji W. Spatial angle dependent lasing from a dye-doped two-dimensional hexagonal photonic crystal made of holographic polymer-dispersed liquid crystals. OPTICS EXPRESS 2012; 20:9058-9063. [PMID: 22513617 DOI: 10.1364/oe.20.009058] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The observation of spatial angle dependent lasing from a dye-doped two-dimensional photonic crystal (2D PC) holographic polymer dispersed liquid crystals made of hexagonal lattice structure is reported. With the increasing output angle of the laser beam in the plane perpendicular to the 2D PC, the lasing wavelength is red-shifted. By analyzing the lasing oscillation trace, we found that the effective lattice constant changes with the output angle, causing the spatial angle dependent lasing.
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Yin ZQ, Lu Y, Zhou BR, Guo Z, Luo D. Effects of topical tacrolimus 0.03% on long-term suberythemal ultraviolet B-irradiated epidermal Langerhans cells in mice. J Eur Acad Dermatol Venereol 2012; 27:521-3. [PMID: 22471949 DOI: 10.1111/j.1468-3083.2012.04540.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Yu L, Jiang BP, Luo D, Shen XC, Guo S, Duan JA, Tang YP. Bioactive components in the fruits of Ziziphus jujuba Mill. against the inflammatory irritant action of Euphorbia plants. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2012; 19:239-244. [PMID: 21982434 DOI: 10.1016/j.phymed.2011.09.071] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2011] [Revised: 07/20/2011] [Accepted: 09/13/2011] [Indexed: 05/31/2023]
Abstract
Chinese jujube (also known as Chinese date) is the fruit of Ziziphus jujuba Mill. (Rhamnaceae). As a famous folk medicine, it is used as antidote in traditional Chinese formula, Shi Zao Decoction, to relieve the drastic inflammatory irritant nature of Euphorbia species. The irritant activities may cause serious adverse effects in clinical practices. This study aimed to investigate the active components of Z. jujuba through the inhibitory effects on the inflammatory cells activated by Euphorbia kansui and prostratin, a phorbol ester isolated from Euphorbia fischeriana. Peritoneal macrophage of rat and splenic lymphocyte (splenocyte) of mouse were selected to evaluate these actions in vitro. Nitric oxide (NO) release of macrophage and the proliferation of splenocyte were examined through Griess method and MTT assay. TNF-α, as an important pro-inflammatory cytokines, was detected with enzyme-linked immunosorbent assay (ELISA) method. Six fractions extracted from Z. jujuba were evaluated and fraction F (triterpene acids fraction) was demonstrated to be the most active part, and then, 21 compounds isolated from Z. jujuba were tested at the concentrations range from 1 μg/ml to 100 μg/ml. The results show that 7 compounds of them are likely to be active compounds concerning to their pronounced inhibitory action on the activated inflammatory cells. These effects might be helpful to attenuate the irritant action of Euphorbiaceae plants and protect the gastrointestinal tissue from potent inflammatory injury, which should be beneficial to some diseases, like inflammatory bowel disease.
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Dong X, Zhao M, Shi J, Yang B, Li J, Luo D, Jiang G, Jiang Y. Effects of combined high-pressure homogenization and enzymatic treatment on extraction yield, hydrolysis and function properties of peanut proteins. INNOV FOOD SCI EMERG 2011. [DOI: 10.1016/j.ifset.2011.07.002] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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158
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Weksberg D, Palmer M, Rebueno N, Vu K, Luo D, Yang J, Shiu A, McAleer M, Brown P, Chang E. Generalizable Class Solutions for Treatment Planning of Spinal Stereotactic Body Radiation Therapy Cases. Int J Radiat Oncol Biol Phys 2011. [DOI: 10.1016/j.ijrobp.2011.06.1523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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159
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160
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Pulliam K, Howell R, Followill D, Luo D, White R, Kry S. SU-E-T-449: Clinical Impact of Couch Top and Couch Rails on Treatment Dose for IMRT and Arc Therapy. Med Phys 2011. [DOI: 10.1118/1.3612403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Faught A, Kry S, Luo D, Molineu A, Galvin J, Drzymala R, Timmerman R, Sheehan J, Gillin M, Ibbott G, Followill D. SU-E-T-173: Design, Development, and Evaluation of a Modified, Anthropomorphic, Head and Neck, Quality Assurance Phantom for Use in Stereotactic Radiosurgery. Med Phys 2011. [DOI: 10.1118/1.3612123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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162
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Pinares-Patiño C, Lassey K, Martin R, Molano G, Fernandez M, MacLean S, Sandoval E, Luo D, Clark H. Assessment of the sulphur hexafluoride (SF6) tracer technique using respiration chambers for estimation of methane emissions from sheep. Anim Feed Sci Technol 2011. [DOI: 10.1016/j.anifeedsci.2011.04.067] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Luo D, Eley J, Du W, Shiu A, Chang E, Brown P, Newhauser W. SU-E-T-244: Should Treatment Time Be Included in Assessing the Quality of a Gamma Plan? Med Phys 2011. [DOI: 10.1118/1.3612195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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164
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Pacurari M, Qian Y, Porter DW, Wolfarth M, Wan Y, Luo D, Ding M, Castranova V, Guo NL. Multi-walled carbon nanotube-induced gene expression in the mouse lung: association with lung pathology. Toxicol Appl Pharmacol 2011; 255:18-31. [PMID: 21624382 DOI: 10.1016/j.taap.2011.05.012] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2011] [Revised: 05/10/2011] [Accepted: 05/12/2011] [Indexed: 10/18/2022]
Abstract
Due to the fibrous shape and durability of multi-walled carbon nanotubes (MWCNT), concerns regarding their potential for producing environmental and human health risks, including carcinogenesis, have been raised. This study sought to investigate how previously identified lung cancer prognostic biomarkers and the related cancer signaling pathways are affected in the mouse lung following pharyngeal aspiration of well-dispersed MWCNT. A total of 63 identified lung cancer prognostic biomarker genes and major signaling biomarker genes were analyzed in mouse lungs (n=80) exposed to 0, 10, 20, 40, or 80μg of MWCNT by pharyngeal aspiration at 7 and 56days post-exposure using quantitative PCR assays. At 7 and 56days post-exposure, a set of 7 genes and a set of 11 genes, respectively, showed differential expression in the lungs of mice exposed to MWCNT vs. the control group. Additionally, these significant genes could separate the control group from the treated group over the time series in a hierarchical gene clustering analysis. Furthermore, 4 genes from these two sets of significant genes, coiled-coil domain containing-99 (Ccdc99), muscle segment homeobox gene-2 (Msx2), nitric oxide synthase-2 (Nos2), and wingless-type inhibitory factor-1 (Wif1), showed significant mRNA expression perturbations at both time points. It was also found that the expression changes of these 4 overlapping genes at 7days post-exposure were attenuated at 56days post-exposure. Ingenuity Pathway Analysis (IPA) found that several carcinogenic-related signaling pathways and carcinogenesis itself were associated with both the 7 and 11 gene signatures. Taken together, this study identifies that MWCNT exposure affects a subset of lung cancer biomarkers in mouse lungs.
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Bi F, Li Q, Zhou C, Yu J, Cai X, Qiu M, Liu J, Yi C, Luo D, Xu F. Preliminary results of a randomized phase II study: Treatment of Chinese patients with advanced gastric cancer with FOLFIRI followed by FOLFOX7 or the reverse sequence. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.4064] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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166
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Huang M, Luo D, Zhang X, Yu M, Zou B, Li Y, Long J, Wang J, Peng F, Xu Y, Li L, Ren L, Hou M, Lu Y. The effect of erlotinib after gefitinib failure in advanced non-small cell lung cancer (NSCLC) patients with poor performance status (PS): A matched-pair case-control study. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.e18057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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167
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Dai HT, Liu YJ, Luo D, Sun XW. Propagation properties of an optical vortex carried by an Airy beam: experimental implementation. OPTICS LETTERS 2011; 36:1617-1619. [PMID: 21540946 DOI: 10.1364/ol.36.001617] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
In this Letter, we experimentally studied the propagation dynamics of Airy beams (AiBs) carrying phase singularity or an optical vortex (OV). A 3/2 phase mask encoded with phase singularity was used to generate AiBs and OVs enjoying precise position alignment and compact optical configuration simultaneously. Experimental results showed that the OV deflection velocity was faster than that of the main lobe of the AiB, agreeing with the analytical prediction. Numerical simulation results are also in agreement with the experimental results. Furthermore, OVs with larger topological charges were also studied experimentally with the same approach.
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Sung JJY, Luo D, Wu JCY, Ching JYL, Chan FKL, Lau JYW, Mack S, Ducharme R, Okolo P, Canto M, Kalloo A, Giday SA. Early clinical experience of the safety and effectiveness of Hemospray in achieving hemostasis in patients with acute peptic ulcer bleeding. Endoscopy 2011; 43:291-5. [PMID: 21455870 DOI: 10.1055/s-0030-1256311] [Citation(s) in RCA: 182] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
BACKGROUND AND STUDY AIMS Endoscopic therapy of upper gastrointestinal bleeding remains challenging with conventional endoscopic devices. Use of Hemospray, where a nanopowder with clotting abilities is sprayed onto the bleeding site, had been highly effective for management of arterial bleeding in a heparizined animal model. The safety and effectiveness of Hemospray for hemostasis of active peptic ulcer bleeding in humans was evaluated. PATIENTS AND METHODS In a prospective, single-arm, pilot clinical study, consecutive adults with confirmed peptic ulcer bleeding (Forrest score Ia or Ib), who had all given informed consent to participation, underwent upper gastrointestinal endoscopy and application of Hemospray within 24 hours of hospital admission once hemodynamically stable. Up to two applications of Hemospray, not exceeding a total of 150 g were allowed. Bleeding recurrence was monitored post procedurally, by second-look endoscopy (72 hours post treatment), and by phone at 30 days. Rate of hemostasis, recurrent bleeding, mortality, need for surgical intervention, and treatment-related complications were assessed. RESULTS 20 patients were recruited (18 men, 2 women; mean age 60.2 years). Acute hemostasis was achieved in 95 % (19 / 20) of patients; 1 patient had a pseudoaneurysm requiring arterial embolization. Bleeding recurred in 2 patients within 72 hours (shown by hemoglobin drop); neither had active bleeding identified at the 72-hour endoscopy. No mortality, major adverse events, or treatment- or procedure-related serious adverse events were reported during 30-day follow-up. CONCLUSION These pilot results indicate that Hemospray is safe in humans. Hemospray was effective in achieving acute hemostasis in active peptic ulcer bleeding.
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Horikawa Y, Tsuchiya N, Yuasa K, Narita S, Saito M, Takayama K, Nara T, Tsuruta H, Obara T, Numakura K, Satoh S, Habuchi T, Hu X, Guo J, Lin Z, Sun L, Xu Z, Cang C, Wang G, Kanda T, Sakamoto K, Matsuki A, Ohashi R, Hirota S, Fujimori Y, Matsuda Y, Yajima K, Kosugi S, Hatakeyama K, Kitahara K, Watanabe M, Nakazono S, Wada N, Kakizaki H, Li J, Gong FJ, Sun PN, Shen L, Li Q, Li N, Qiu M, Liu J, Yi C, Luo D, Li Z, Gou H, Yang Y, Cao D, Shen Y, Wang X, Xu F, Bi F, Li Q, Zhang X, Li N, Wei W, Luo HY, Wang ZQ, Wang FH, Qiu MZ, Teng KY, Ruan DY, He YJ, Li YH, Xu RH, Matsusaka S, Mizunuma N, Suenaga M, Shinozaki E, Mishima Y, Terui Y, Hatake K, Nara E, Kodaira M, Mishima Y, Yokoyama M, Saotome T, Terui Y, Takahashi S, Hatake K, Nishimura N, Nakano K, Kodaira M, Ueda K, Yamada S, Mishima Y, Yokoyama M, Saotome T, Takahashi S, Terui Y, Hatake K, Nozawa M, Mochida Y, Nishigaki K, Nagae S, Uemura H, Oh SY, Jeong CY, Hong SC, Lee WS, Kim HG, Lee GW, Hwang IG, Jang JS, Kwon HC, Kang JH, Ozaka M, Ogura M, Matsusaka S, Shinozaki E, Suenaga M, Chin K, Mizunuma N, Hatake K, Pua PF, Ganzon D, Chan V, Sailaja K, Vishnupriya S, Raghunadharao D, Markandeya G, Reddy PRK, Reddanna P, Praveen D, Sakamoto K, Kanda T, Matsuki A, Takano T, Hanyu T, Yajima K, Kosugi S, Hirota S, Hatakeyama K, Shigekawa T, Ijichi N, Takayama S, Tsuda H, Ikeda K, Horie K, Osaki A, Saeki T, Inoue S, Subhashini J, Rajesh B, Rajesh I, Ravindran P, Takagi K, Chin K, Oba M, Kuboki Y, Ichimura T, Oto M, Kawazoe Y, Watanabe T, Ozaka M, Ogura M, Suenaga M, Shinozaki E, Matsusaka S, Mizunuma N, Hatake K, Ueda K, Saotome T, Yamada S, Nishimura N, Nara E, Nakano K, Kodaira M, Katsube A, Mishima Y, Terui Y, Yokoyama M, Takahashi S, Hatake K, Yao X, Yang Q, Li C, Diao L, Chen X, Yu Z, Zuo W, Wang Y, He Y, Zhang X, Cai S, Wang Z, Xu J, Zhan W, Zhang YF, Misumi M, Takeuchi H, Nakamiya N, Shigekawa T, Matsuura K, Fujiuchi N, Osaki A, Saeki T. CLINICAL OUTCOMES. Jpn J Clin Oncol 2011. [DOI: 10.1093/jjco/hyq254] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Zhang Z, Ranchord A, Webber M, Simmonds M, Matsis P, Aitken A, Sasse A, Luo D, Harding S. Same-day Discharge Following Elective PCI—10 Year Single Centre Experience. Heart Lung Circ 2011. [DOI: 10.1016/j.hlc.2011.05.364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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171
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Dai HT, Liu YJ, Luo D, Sun XW. Propagation dynamics of an optical vortex imposed on an Airy beam. OPTICS LETTERS 2010; 35:4075-4077. [PMID: 21124617 DOI: 10.1364/ol.35.004075] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
In this Letter, we demonstrate the general propagation dynamics of an Airy beam (AiB) carrying unit phase singularity, i.e., optical vortices (OVs). For the OV with a unit charge, theoretical analysis indicates that the OV carried by the AiB will propagate along the parabolic trajectory with an acceleration velocity twice as fast as conventional AiBs before a critical position. Thereafter, the AiB main lobe destroyed by OV will be reconstructed and the phase singularity will reappear in the middle of the AiB profile.
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Vu K, Palmer M, Rebueno N, Luo D, Chang E. Dosimetric Benchmarks Utilizing a Planning CTV (pCTV) Concept Based on Achievable Dose Gradients from 91 patients Treated with Intensity Modulated Stereotactic Spine Radiation Therapy (IMSRT). Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.1814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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173
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Luo D, Zhao Q, Zhao M, Yang B, Long X, Ren J, Zhao H. Effects of limited proteolysis and high-pressure homogenisation on structural and functional characteristics of glycinin. Food Chem 2010. [DOI: 10.1016/j.foodchem.2010.02.011] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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174
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Li J, Hu X, Luo D, Xu L, Chen X, Li X, Jian D, Yi M, Xie H. The survey of HIV/AIDS related knowledge, attitude and behaviour among migrant peasant workers in middle city in China. W INDIAN MED J 2010; 59:418-423. [PMID: 21355518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
OBJECTIVES To explore HIV/AIDS related knowledge, attitude and behaviour among migrant peasant workers in Changsha, which is a inland city in central China, and to provide evidence that educating this population may help to prevent the spread of HIV/AIDS in China. METHODS A total of 1782 migrant peasant workers participated in the study. A questionnaire was used to determine their knowledge of HIV/AIDS and related attitude and behaviour items. RESULTS The majority of the respondents had a rather low level of overall HIV/AIDS knowledge and its prevention, had what constituted risky behaviour in this regard and a generally low acceptance of HIV-infected persons. Furthermore, their behaviour and attitude were analysed with respect to their educational level, occupational class and score of HIV/AIDS related knowledge. CONCLUSIONS The results of this investigation will help healthcare professionals develop a sensitive and specific educational programme for migrant peasant workers. Educating this population will be a very important aspect of HIV/AIDS prevention in China.
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Jin S, Zhou B, Luo D. Hesperidin promotes cyclobutane pyrimidine dimer repair in UVB-exposed mice epidermis. Ir J Med Sci 2010; 180:709-14. [PMID: 20535600 DOI: 10.1007/s11845-010-0503-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2010] [Accepted: 05/10/2010] [Indexed: 02/04/2023]
Abstract
PURPOSE To investigate whether topical application of hesperin affords protection to Balb/C mice epidermis from UVB-induced cyclobutane pyrimidine dimers (CPDs). METHODS A DNA damage model of UVB irradiation-induced mice epidermis was established. The immunohistochemical staining and southwestern dot blotting were used for CPDs detection; western blotting was used for P53 detection. RESULTS Topical application of hesperidin on Balb/C mice skin significantly decreased the amount of epidermal CPDs 24 and 48 h after 180 mJ/cm(2) of UVB irradiation as compared to untreated mice. UVB-induced p53 expression was more pronounced in hesperidin-treated mice epidermis compared to that of untreated mice. CONCLUSION Taken together, these results suggest that topical hesperidin application promotes DNA photo-damage repair. Hesperidin is therefore a promising protective substance against UVB radiation.
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