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Filippi CG, Stein JM, Wang Z, Bakas S, Liu Y, Chang PD, Lui Y, Hess C, Barboriak DP, Flanders AE, Wintermark M, Zaharchuk G, Wu O. Ethical Considerations and Fairness in the Use of Artificial Intelligence for Neuroradiology. AJNR Am J Neuroradiol 2023; 44:1242-1248. [PMID: 37652578 PMCID: PMC10631523 DOI: 10.3174/ajnr.a7963] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Accepted: 07/07/2023] [Indexed: 09/02/2023]
Abstract
In this review, concepts of algorithmic bias and fairness are defined qualitatively and mathematically. Illustrative examples are given of what can go wrong when unintended bias or unfairness in algorithmic development occurs. The importance of explainability, accountability, and transparency with respect to artificial intelligence algorithm development and clinical deployment is discussed. These are grounded in the concept of "primum no nocere" (first, do no harm). Steps to mitigate unfairness and bias in task definition, data collection, model definition, training, testing, deployment, and feedback are provided. Discussions on the implementation of fairness criteria that maximize benefit and minimize unfairness and harm to neuroradiology patients will be provided, including suggestions for neuroradiologists to consider as artificial intelligence algorithms gain acceptance into neuroradiology practice and become incorporated into routine clinical workflow.
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Affiliation(s)
- C G Filippi
- From the Department of Radiology (C.G.F.), Tufts University School of Medicine, Boston, Massachusetts
| | - J M Stein
- Department of Radiology (J.M.S., S.B.), University of Pennsylvania, Philadelphia, Pennsylvania
| | - Z Wang
- Athinoula A. Martinos Center for Biomedical Imaging (Z.W., Y. Liu, O.W.), Department of Radiology, Massachusetts General Hospital, Boston, Massachusetts
| | - S Bakas
- Department of Radiology (J.M.S., S.B.), University of Pennsylvania, Philadelphia, Pennsylvania
| | - Y Liu
- Athinoula A. Martinos Center for Biomedical Imaging (Z.W., Y. Liu, O.W.), Department of Radiology, Massachusetts General Hospital, Boston, Massachusetts
| | - P D Chang
- Department of Radiological Sciences (P.D.C.), University of California, Irvine, California
| | - Y Lui
- Department of Neuroradiology (Y. Lui), NYU Langone Health, New York, New York
| | - C Hess
- Department of Radiology and Biomedical Imaging (C.H.), University of California, San Francisco, San Francisco, California
| | - D P Barboriak
- Department of Radiology (D.P.B.), Duke University School of Medicine, Durham, North Carolina
| | - A E Flanders
- Department of Neuroradiology/Otolaryngology (ENT) Radiology (A.E.F.), Thomas Jefferson University, Philadelphia, Pennsylvania
| | - M Wintermark
- Department of Neuroradiology (M.W.), Division of Diagnostic Imaging, MD Anderson Cancer Center, Houston, Texas
| | - G Zaharchuk
- Department of Radiology (G.Z.), Stanford University, Stanford, California
| | - O Wu
- Athinoula A. Martinos Center for Biomedical Imaging (Z.W., Y. Liu, O.W.), Department of Radiology, Massachusetts General Hospital, Boston, Massachusetts
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Pham N, Hill V, Rauschecker A, Lui Y, Niogi S, Fillipi CG, Chang P, Zaharchuk G, Wintermark M. Critical Appraisal of Artificial Intelligence-Enabled Imaging Tools Using the Levels of Evidence System. AJNR Am J Neuroradiol 2023; 44:E21-E28. [PMID: 37080722 PMCID: PMC10171388 DOI: 10.3174/ajnr.a7850] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Accepted: 03/16/2023] [Indexed: 04/22/2023]
Abstract
Clinical adoption of an artificial intelligence-enabled imaging tool requires critical appraisal of its life cycle from development to implementation by using a systematic, standardized, and objective approach that can verify both its technical and clinical efficacy. Toward this concerted effort, the ASFNR/ASNR Artificial Intelligence Workshop Technology Working Group is proposing a hierarchal evaluation system based on the quality, type, and amount of scientific evidence that the artificial intelligence-enabled tool can demonstrate for each component of its life cycle. The current proposal is modeled after the levels of evidence in medicine, with the uppermost level of the hierarchy showing the strongest evidence for potential impact on patient care and health care outcomes. The intended goal of establishing an evidence-based evaluation system is to encourage transparency, foster an understanding of the creation of artificial intelligence tools and the artificial intelligence decision-making process, and to report the relevant data on the efficacy of artificial intelligence tools that are developed. The proposed system is an essential step in working toward a more formalized, clinically validated, and regulated framework for the safe and effective deployment of artificial intelligence imaging applications that will be used in clinical practice.
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Affiliation(s)
- N Pham
- From the Department of Radiology (N.P., G.Z.), Stanford School of Medicine, Palo Alto, California
| | - V Hill
- Department of Radiology (V.H.), Northwestern University Feinberg School of Medicine, Chicago, Illinois
| | - A Rauschecker
- Department of Radiology (A.R.), University of California, San Francisco, San Francisco, California
| | - Y Lui
- Department of Radiology (Y.L.), NYU Grossman School of Medicine, New York, New York
| | - S Niogi
- Department of Radiology (S.N.), Weill Cornell Medicine, New York, New York
| | - C G Fillipi
- Department of Radiology (C.G.F.), Tufts University School of Medicine, Boston, Massachusetts
| | - P Chang
- Department of Radiology (P.C.), University of California, Irvine, Irvine, California
| | - G Zaharchuk
- From the Department of Radiology (N.P., G.Z.), Stanford School of Medicine, Palo Alto, California
| | - M Wintermark
- Department of Neuroradiology (M.W.), The University of Texas MD Anderson Cancer Center, Houston, Texas
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Lee LYK, Yeung CK, Choi CW, Leung MN, Lui Y, Tam WY, Tang KY, Wong C, Wong Y, Yau CY, Yeung TL, Lee JKL, Chui DLK. 1040 VALIDATION OF THE CHINESE VERSION OF THE ASSISTANCE PREFERENCE CHECKLIST. Age Ageing 2022. [DOI: 10.1093/ageing/afac126.059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Introduction
Domestic robots have great potential to be developed as a useful and supportive device for elders in domestic setting. To achieve the intended purpose, the designs of domestic robots should make reference to elders’ preferences. The Assistance Preference Checklist is developed to assess elders’ preferences on receiving assistance from domestic robots. It comprises of 48 home-based task under six categories including personal care, leisure activities, health assistance, chores, information management, and manipulating objects. Altogether, these tasks are considered important for the elders to fulfil their general health needs and maintain their homes. The Assistance Preference Checklist is valid and reliable. To adapt it in the Chinese population, the Assistance Preference Checklist has been translated from English to Chinese according to the standard translation model. This study aims to validate the Chinese version of the Assistance Preference Checklist (the checklist).
Method
This was a validation study. Semantic and content equivalence of the checklist was evaluated by an expert panel (five academic specialized on instrument validation or translation and 15 nurses specialized on geriatrics). Content validity of the checklist was assessed by another expert panel (one academic specialized on instrument validation and two nurses specialized on geriatrics). Internal consistency of the checklist was determined by Cronbach's method on a convenience sample of 50 Chinese-speaking elders in Hong Kong.
Results
The checklist demonstrated good semantic and content equivalence with the original English version. The experts agreed that it was appropriately translated. The checklist demonstrated good content validity by having a content validity index of 1.00. Additionally, the checklist reported satisfactory internal consistency by having a Cronbach's alpha of 0.95.
Conclusion
The Chinese version of the Assistance Preference Checklist is a useful instrument for assessing elders’ preferences on receiving assistance from domestic robots. Findings provide evidence on its validity and reliability.
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Affiliation(s)
- L Y K Lee
- School of Nursing and Health Studies, Hong Kong Metropolitan University
| | - C K Yeung
- School of Nursing and Health Studies, Hong Kong Metropolitan University
| | - C W Choi
- School of Nursing and Health Studies, Hong Kong Metropolitan University
| | - M N Leung
- School of Nursing and Health Studies, Hong Kong Metropolitan University
| | - Y Lui
- School of Nursing and Health Studies, Hong Kong Metropolitan University
| | - W Y Tam
- School of Nursing and Health Studies, Hong Kong Metropolitan University
| | - K Y Tang
- School of Nursing and Health Studies, Hong Kong Metropolitan University
| | - C Wong
- School of Nursing and Health Studies, Hong Kong Metropolitan University
| | - Y Wong
- School of Nursing and Health Studies, Hong Kong Metropolitan University
| | - C Y Yau
- School of Nursing and Health Studies, Hong Kong Metropolitan University
| | - T L Yeung
- School of Nursing and Health Studies, Hong Kong Metropolitan University
| | - J K L Lee
- School of Nursing and Health Studies, Hong Kong Metropolitan University
| | - D L K Chui
- School of Nursing and Health Studies, Hong Kong Metropolitan University
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Chui DLK, Yeung CK, Choi CW, Leung MN, Lui Y, Tam WY, Tang KY, Wong C, Wong Y, Yau CY, Yeung TL, Lee JKL, Lee LYK. 1047 VALIDATION OF THE CHINESE VERSION OF THE KATZ INDEX OF INDEPENDENCE IN ACTIVITIES OF DAILY LIVING. Age Ageing 2022. [DOI: 10.1093/ageing/afac126.064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Introduction
Among the instruments that measure an elder’s functional dependence level, the Katz Index of Independence in Activities of Daily Living has the advantages of being neutral, easy to use, valid, and reliable. It is a six-item instrument rating an elder’s functional dependence level in performing activities of daily living, including bathing, dressing, toileting, transferring, continence, and feeding. Each item can be rated nominally as 1 (does not require assistance to finish the activity) or 0 (requires assistance to finish the activity). By summing the score of the six items, the functional dependence level of an elder can be classified as independent (6 points), partially dependent (3–5 points), or dependent (< 2 points). The instrument has been translated from English to Chinese through forward and backward translation. This study aims to validate the Chinese version of the Katz Index of Independence in Activities of Daily Living (Katz ADL-Chinese).
Method
This was a validation study. The Katz ADL-Chinese was examined by an expert panel (one academic specialized on instrument validation, four academic specialized on translation, fifteen nurses specialized on geriatrics) for its semantic and content equivalence with the original English version. It was evaluated by another expert panel (one academic specialized on instrument validation and two nurses specialized on geriatrics) for its content validity. Moreover, it was tested and re-tested at 1-week interval on 30 Chinese-speaking elders in Hong Kong.
Results
Good result was achieved on the testing for semantic and content equivalence. All experts confirmed that the Katz ADL-Chinese was appropriately translated. Good content validity was observed. The context validity index at item-level and scale-level was 1.00, respectively. Good stability was observed as well. The test–retest reliability coefficient was 0.85.
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Affiliation(s)
- D L K Chui
- School of Nursing and Health Studies, Hong Kong Metropolitan University
| | - C K Yeung
- School of Nursing and Health Studies, Hong Kong Metropolitan University
| | - C W Choi
- School of Nursing and Health Studies, Hong Kong Metropolitan University
| | - M N Leung
- School of Nursing and Health Studies, Hong Kong Metropolitan University
| | - Y Lui
- School of Nursing and Health Studies, Hong Kong Metropolitan University
| | - W Y Tam
- School of Nursing and Health Studies, Hong Kong Metropolitan University
| | - K Y Tang
- School of Nursing and Health Studies, Hong Kong Metropolitan University
| | - C Wong
- School of Nursing and Health Studies, Hong Kong Metropolitan University
| | - Y Wong
- School of Nursing and Health Studies, Hong Kong Metropolitan University
| | - C Y Yau
- School of Nursing and Health Studies, Hong Kong Metropolitan University
| | - T L Yeung
- School of Nursing and Health Studies, Hong Kong Metropolitan University
| | - J K L Lee
- School of Nursing and Health Studies, Hong Kong Metropolitan University
| | - L Y K Lee
- School of Nursing and Health Studies, Hong Kong Metropolitan University
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5
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Pei Y, Lui Y, Cai S, Zhou C, Hong P, Qian ZJ. A Novel Peptide Isolated from Microalgae Isochrysis zhanjiangensis Exhibits Anti-apoptosis and Anti-inflammation in Ox-LDL Induced HUVEC to Improve Atherosclerosis. Plant Foods Hum Nutr 2022; 77:181-189. [PMID: 35476173 DOI: 10.1007/s11130-022-00965-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 04/05/2022] [Indexed: 06/14/2023]
Abstract
In the early stage, oxidized low density lipoprotein (ox-LDL) caused atherosclerosis, followed by human umbilical vein endothelial cells (HUVEC) damage, leading to a variety of cardiovascular related diseases. This study investigated the mechanism of nonapeptide (EMFGTSSET, ETT) isolated from in vitro gastrointestinal digestion of Isochrysis zhanjiang on endothelial cell inflammation and apoptosis induced by ox-LDL in atherosclerosis. At the cellular level, the results shown that ETT inhibited the up-regulation of oxidized low-density lipoprotein receptor-1 (LOX-1) induced by ox-LDL. Furthermore, ETT inhibited the fluorescence intensity of ROS, inflammatory factors (interleukin-6, interleukin-1β, and tumor necrosis factor-α) and the expression of cell adhesion molecules (vascular cell adhesion protein 1 and intercellular cell adhesion molecule-1). In addition, it also upregulates nuclear red blood cell 2 related factor 2 (Nrf2), heme oxygenase-1 (HO -1), p-Akt, and bcl-2 levels. But down-regulated the expression of p-p65, p-IκB-α, p-p38, p-ERK, p-JNK, bax, and cleaved caspase-9/-3 (c-c-9/-3), thereby inhibited ox-LDL induction inflammation and apoptosis of atherosclerosis. Through molecular docking, it was judged that the stable interaction between ETT and LOX-1 and VCAM-1 was maintained through hydrogen bonding. These results can provide a theoretical basis for ETT as a potential substance for the prevention and treatment of atherosclerosis, and further improve the value of Isochrysis zhanjiangensis.
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Affiliation(s)
- Yu Pei
- College of Food Science and Technology, School of Chemistry and Environment, Shenzhen Institute of Guangdong Ocean University, Zhanjiang 524088 and Shenzhen 518114, China
| | - Yi Lui
- College of Food Science and Technology, School of Chemistry and Environment, Shenzhen Institute of Guangdong Ocean University, Zhanjiang 524088 and Shenzhen 518114, China
| | - Shengxuan Cai
- College of Food Science and Technology, School of Chemistry and Environment, Shenzhen Institute of Guangdong Ocean University, Zhanjiang 524088 and Shenzhen 518114, China
| | - Chunxia Zhou
- College of Food Science and Technology, School of Chemistry and Environment, Shenzhen Institute of Guangdong Ocean University, Zhanjiang 524088 and Shenzhen 518114, China
- Southern Marine Science and Engineering Guangdong Laboratory, Zhanjiang, 524025, China
| | - Pengzhi Hong
- College of Food Science and Technology, School of Chemistry and Environment, Shenzhen Institute of Guangdong Ocean University, Zhanjiang 524088 and Shenzhen 518114, China.
- Southern Marine Science and Engineering Guangdong Laboratory, Zhanjiang, 524025, China.
| | - Zhong-Ji Qian
- College of Food Science and Technology, School of Chemistry and Environment, Shenzhen Institute of Guangdong Ocean University, Zhanjiang 524088 and Shenzhen 518114, China.
- Southern Marine Science and Engineering Guangdong Laboratory, Zhanjiang, 524025, China.
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6
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Raz E, Kister I, Omari M, Herbert J, Lui Y, Loh J. Periependymal Abnormalities in Neuromyelitis Optica Spectrum Disorders and Multiple Sclerosis: A Case-Control Study (P07.066). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.p07.066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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7
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Abstract
The concept of bioprospecting for bioactive peptides from keratin-containing materials such as wool, hair, skin and feathers presents an exciting opportunity for discovery of novel functional food ingredients and nutraceuticals, while value-adding to cheap and plentiful natural sources. The published literature reports multiple examples of proline-rich peptides with productive bio-activity in models of human disease including tumour formation, hypertension control and Alzheimer’s disease. Bioactive peptides have been identified from food and other protein sources however the bioactivity of keratin-related proteins and peptides is largely unknown. Considering the high representation of proline-rich peptides among proven bioactive peptides, the proline-rich character of keratinous proteins supports current research. A selection of mammalian (cow epidermis, sheep wool) and avian (chicken feather) keratinous materials were subjected to enzymatic hydrolysis using established processing methods. A bio-assay of determining inhibition of early stage amyloid aggregation involved using a model fibril-forming protein – reduced and carboxymethylated bovine K-casein (RCMk-CN) and quantitation of fibril development with the amyloid-specific fluorophore, Thioflavin T (ThT). The assay was fully validated for analytical repeatability and used together with appropriate positive controls. Peptide library products derived from chicken feather (n=9), sheep wool (n=9) and bovine epidermis (n=9) were screened in the fibril inhibition assay based on K-casein. 3 of 27 products exhibited interesting levels of bio-activity with regard to fibril inhibition. HPLC profiles provide an indication of the complexity of the assemblage of peptides in the three active products. We conclude the bioprospecting research using keratinous materials shows promise for discovery of useful bioactive peptides.
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Affiliation(s)
- L N Jones
- Department of Medicine, University of Melbourne, St Vincent's Hospital, Melbourne 3065, Australia 5005
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8
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Cheng XX, Lui Y, Zhou B, Xiao XH, Liu Y. Probing the binding sites and the effect of berbamine on the structure of bovine serum albumin. Spectrochim Acta A Mol Biomol Spectrosc 2009; 72:922-928. [PMID: 19185535 DOI: 10.1016/j.saa.2008.12.003] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2008] [Revised: 11/20/2008] [Accepted: 12/08/2008] [Indexed: 05/27/2023]
Abstract
Berbamine, a naturally occurring isoquinoline alkaloid extracted from Berberis sp., is the active constituent of some Chinese herbal medicines and exhibits a variety of pharmacological activities. The effects of berbamine on the structure of bovine serum albumin (BSA) were investigated by circular dichroism, fluorescence and absorption spectroscopy under physiological conditions. Berbamine caused a static quenching of the intrinsic fluorescence of BSA, and the quenching data were analyzed by application of the Stern-Volmer equation. There was a single primary berbamine-binding site on BSA with a binding constant of 2.577x10(4)Lmol(-1) at 298K. The thermodynamic parameters, enthalpy change (DeltaH(0)) and entropy change (DeltaS(0)) for the reaction were -76.5kJmol(-1) and -173.4Jmol(-1)K(-1) according to the van't Hoff equation. The results showed that the hydrogen bond and van der Waals interaction were the predominant forces in the binding process. Competitive experiments revealed a displacement of warfarin by berbamine, indicating that the binding site was located at Drug sites I. The distance r between the donor (BSA) and the acceptor (berbamine) was obtained according to the Förster non-radiation energy transfer theory. The results of three-dimensional fluorescence spectra, UV-vis absorption difference spectra and circular dichroism of BSA in the presence of berbamine showed that the conformation of BSA was changed. The results provide a quantitative understanding of the effect of berbamine on the structure of bovine serum albumin, providing a useful guideline for further drug design.
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Affiliation(s)
- Xiao-Xia Cheng
- State Key Laboratory of Virology, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, PR China
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9
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Lin X, Zamora PO, Takahashi K, Lui Y. Alleviation of experimental ulcerative colitis with the synthetic peptide, F2A4-K-NS (Fibratide). Dig Dis Sci 2007; 52:2054-62. [PMID: 17404850 DOI: 10.1007/s10620-006-9641-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2006] [Accepted: 10/09/2006] [Indexed: 12/09/2022]
Abstract
Recombinant fibroblast growth factors (FGFs) maintain the integrity of the gut epithelium and reduce mucosal injury in experimental inflammatory bowel disease (IBD). Chemically synthesized FGF mimetics could potentially extend the utility of FGFs by tailoring them for optimal bioactivity and oral administration, for example. Here, F2A4-K-NS (Fibratide), a synthetic FGF mimetic peptide, alleviated dextran sulfate sodium (DSS)-induced ulcerative colitis in mice when delivered systemically and, to a lesser extent, orally. Intraperitoneal injection of Fibratide (1 or 5 mg/kg/day) ameliorated DSS-induced ulcerative colitis, resulting in reduced weight loss, decreased colon wall thickening, and increased colon length. Fibratide also improved epithelial integrity by reducing histological-detectable crypt damage and inflammation. Orally administered Fibratide (1 mg/kg/day) was also effective in ameliorating symptoms with effects generally similar to those of intraperitoneal injection. In vitro studies were conducted to help clarify how Fibratide might act in vivo. Fibratide exhibited a modest enhancement of epithelial cell proliferation. On the other hand, Fibratide doubled the rate of epithelial cells migration and restitution in a cell culture model of wound repair. Collectively, the results indicate that Fibratide reduced the severity of experimental ulcerative colitis and may be potentially useful in the treatment of IBD.
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Affiliation(s)
- Xinhua Lin
- BioSurface Engineering Technologies, Inc., 9430 Key West Avenue, Suite 220, Rockville, Maryland 20850, USA.
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10
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McKenzie TS, Lui Y, Swisher S, Pataer A, Chada S, Fanale M, Hunt K. Combination therapy of heceptin and ad-mda7 inhibits growth of her-2/neu overexpressing breast cancer in vivo. Ann Surg Oncol 2004. [DOI: 10.1007/bf02524094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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11
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Huang Z, Liao L, Wang S, Lui Y. [Dynamics of phenolics content of Chinese fir stump-roots and the rhizosphere soil and it's allelopathy]. Ying Yong Sheng Tai Xue Bao 2000; 11:190-2. [PMID: 11767591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
Studies on the releasing pattern of phenolics during the decomposition of Chinese fir stump-root and on its allelopathy show that the phenolics contents in stump-roots decreased with their decomposition. Roots had a higher content of phenolics than heart stumps, and edge stumps had the least. The phenolics was released during decomposition, and accumulated in the soils around stump-roots. Pot culture experiment showed that phenolics affected the germination of Chinese fir seeds. The correlation analysis between the density of Chinese fir stump-root and the tree height and base diameter (BD) of its saplings proved that Chinese fir stump-roots had a negative impact on the growth of the next generation of Chinese fir plantations. It is suggested that the traditional operation of Chinese fir plantations should be reformed, and the stump-roots should be cleared from woodland before reforestation.
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Affiliation(s)
- Z Huang
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110015.
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12
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13
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Xu HM, Gagliardi CA, Ajupova GK, Kokenge B, Lui Y. Gamow-Teller strength of 26Mg. Phys Rev C Nucl Phys 1996; 54:3266-3269. [PMID: 9971701 DOI: 10.1103/physrevc.54.3266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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14
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Lui Y, Fang D, Lu R. [A study on the loss of heterozygosity at the APC/MCC and DCC genetic loci in colorectal cancers]. Zhonghua Nei Ke Za Zhi 1996; 35:439-43. [PMID: 9592312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
To evaluate the role of APC, MCC and DCC genes in the development and progression of colorectal cancers, loss of heterozygosity (LOH) at these genetic loci was investigated in 41 surgically resected specimens of colorectal cancer by using polymerase chain reaction (PCR) and restriction fragment length polymorphism (RFLP) analysis. LOH at APC or/and MCC was detected in 38.9% (14/38) of the informative cases; at the APC in 28.0% (7/25) and at MCC locus in 36.4% (8/22). LOH at DCC genetic locus was detected in 55.3% (21/38) of the informative cases. LOH rates DCC gene in the cancer specimens with lymphnode metastasis (80.0%) and in Dukes' stage III and IV (71.4%) were significantly higher than that in specimens without lymphnode metastasis (39.1%) and in Dukes' stage I and II (35.3%) (P < 0.05). Our results suggest that LOH at APC/MCC and DCC is the common genetic alterations in colorectal cancer and DCC genetic LOH assay may be useful in predicting the prognosis of patients with colorectal cancer.
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Affiliation(s)
- Y Lui
- Department of Gastroenterology, Southwest Hospital, Third Military Medical College, Chongqing
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15
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Clark HL, Youngblood DH, Lui Y. High energy octupole resonance in 116Sn. Phys Rev C Nucl Phys 1996; 54:72-77. [PMID: 9971323 DOI: 10.1103/physrevc.54.72] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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16
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Youngblood DH, Clark HL, Lui Y. Missing isoscalar monopole strength in 58Ni. Phys Rev Lett 1996; 76:1429-1432. [PMID: 10061721 DOI: 10.1103/physrevlett.76.1429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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17
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Scharrer B, Paemen L, Smith EM, Hughes TK, Lui Y, Pope M, Stefano GB. The presence and effects of mammalian signal molecules in immunocytes of the insect Leucophaea maderae. Cell Tissue Res 1996; 283:93-7. [PMID: 8581963 DOI: 10.1007/s004410050516] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Opioid peptides activate immunocytes and opiate alkaloids inhibit this activation in the mussel, Mytilus edulis. Here we present evidence that cells of another invertebrate, Leucophaea maderae, can be influenced in a similar way by the Met-enkephalin analogue D-Ala2-Met5-enkephalin (DAMA) and morphine. Effects of different signal molecules on Leucophaea hemocytes were evaluated by computer-assisted image analysis of their conformational state. A small percentage of the untreated cells were found to display spontaneous conformational changes after 25 min of incubation without pharmacological agents which was noted as a decrease in both circularity factor and shape factor values. Activation caused the cells to become elliptical, a feature that appears to be characteristic of Leucophaea immunocytes. Administration of DAMA induced a similar activation of most of the cells. After 30 min these DAMA-activated cells started to display distinct locomotory activity not seen in the controls. alpha-Melanocyte-stimulating hormone (MSH, 10(-7)) added to the incubation medium after DAMA-activation caused the cells to return to their original "rounded" conformation. In addition, the presence of immunoreactive interleukin (IL-1), adrenocorticotropin (ACTH) and tumor necrosis factor (TNF) in the hemolymph was demonstrated. These data suggest an interaction between both vertebrate-type immunological signal molecules and neuropeptides in the regulation of immunological cells in Leucophaea.
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Affiliation(s)
- B Scharrer
- Departments of Anatomy and Structural Biology and Neuroscience, Albert Einstein College of Medicine, Bronx, NY 10461, USA
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Xu HM, Ajupova GK, Betker AC, Gagliardi CA, Kokenge B, Lui Y, Zaruba AF. (d,2He) reactions at Ed=125.2 MeV. Phys Rev C Nucl Phys 1995; 52:R1161-R1165. [PMID: 9970680 DOI: 10.1103/physrevc.52.r1161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Chen SS, Zhang HF, Xue WT, Li K, Wang P, Lui Y. Predictors for prognosis of chronic myelocytic leukemia. Chin Med J (Engl) 1993; 106:760-2. [PMID: 7913433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Bone marrows from 30 newly diagnosed Ph+chronic myelocytic leukemia (CML) (21 in chronic phase, CML-CP, 9 in accelerate phase, CML-AP) and 8 followed up patients in blast crisis (CML-BC) were tested by DNA strand breaks (%D value), DNA-aneuploidy, flow cytometry-cell surface antigen expression for CD15 and HLA-DR ratio. Our results showed that all these three parameters changed as the disease escalated. A very low value of %D and DNA-aneuploidy occurrences were high risk factors. Cell surface antigen expression CD15 and HLA-DR ratio measurement was simple and reliable. The ratio < 1.0 appeared earlier than morphology clarifying CML-AP and should be followed up regularly.
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MESH Headings
- Aneuploidy
- Antigens, CD/metabolism
- Antigens, Differentiation, Myelomonocytic/metabolism
- Biomarkers, Tumor/metabolism
- Blast Crisis/genetics
- Blast Crisis/immunology
- Blast Crisis/pathology
- DNA Damage
- DNA, Neoplasm/genetics
- DNA, Neoplasm/metabolism
- Flow Cytometry
- HLA-DR Antigens/metabolism
- Humans
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/genetics
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/immunology
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/pathology
- Lewis X Antigen
- Prognosis
- Risk Factors
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Affiliation(s)
- S S Chen
- Institute of Hematology, Beijing Medical University
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Youngblood DH, Lui Y, Garg U, Peterson RJ. Giant quadrupole resonance in Ni isotopes. Phys Rev C Nucl Phys 1992; 45:2172-2176. [PMID: 9967977 DOI: 10.1103/physrevc.45.2172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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21
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Youngblood DH, Lui Y. Monopole strength in 58Ni. Phys Rev C Nucl Phys 1991; 44:1878-1881. [PMID: 9967608 DOI: 10.1103/physrevc.44.1878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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22
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Utsunomiya H, Lui Y, Haenni DR, Dejbakhsh H, Cooke L, Srivastava BK, Turmel W, O'Kelly D, Schmitt RP, Shapira D, Ray A, Udagawa T. Breakup of 7Li near the alpha -t threshold and a possible probe of radiative-capture processes. Phys Rev Lett 1990; 65:847-850. [PMID: 10043038 DOI: 10.1103/physrevlett.65.847] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Garg U, Beard KB, Ye D, Galonsky A, Murakami T, Winfield JS, Lui Y, Youngblood DH. Experimental test of a newly proposed empirical relationship between the centroid and width of the giant quadrupole resonance and the neutron binding energy of the nucleus. Phys Rev C Nucl Phys 1990; 41:1845-1847. [PMID: 9966533 DOI: 10.1103/physrevc.41.1845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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24
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Toba Y, Lui Y, Youngblood DH, Garg U, Grabmayr P, Knöpfle KT, Riedesel H, Wagner GJ. Charged particle decay from giant monopole resonance in 28Si. Phys Rev C Nucl Phys 1990; 41:1417-1434. [PMID: 9966490 DOI: 10.1103/physrevc.41.1417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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25
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Lui Y. [We must pay attention to the difference between the original intention and the current status of family planning]. Renkou Yanjiu 1989:49-51. [PMID: 12159317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/26/2023]
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Shlomo S, Lui Y, Youngblood DH, Udagawa T, Tamura T. Coulomb and nuclear excitation of giant dipole resonances in ( alpha, alpha ') inelastic scattering. Phys Rev C Nucl Phys 1987; 36:1317-1324. [PMID: 9954220 DOI: 10.1103/physrevc.36.1317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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27
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Murakami T, Takahashi N, Lui Y, Takada E, Tanner DM, Tribble RE, Ungricht E, Nagatani K. Search for a direct large-cluster-transfer process in the 12,13C(20Ne, alpha ) reaction. Phys Rev C Nucl Phys 1985; 32:2161-2164. [PMID: 9953092 DOI: 10.1103/physrevc.32.2161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Murakami T, Ungricht E, Lui Y, Mihara Y, Takada E, Tribble RE. Alpha transfer reaction 16O(12C,8Beg.s.)Ne: Key process in the 12C(16O, alpha ) reaction. Phys Rev C Nucl Phys 1985; 32:1558-1562. [PMID: 9953011 DOI: 10.1103/physrevc.32.1558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Lui Y, Bronson JD, Youngblood DH, Toba Y, Garg U. Giant quadrupole and monopole resonances in 28Si. Phys Rev C Nucl Phys 1985; 31:1643-1650. [PMID: 9952700 DOI: 10.1103/physrevc.31.1643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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