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Feng GH, Yue QQ, Zhao KH, Peng T, Tang T, Sun YX, Meng XR, Huang LL, Zeng X, Zeng Y. Factors affecting the compliance of hepatocellular carcinoma screening among high-risk populations: A systematic review and meta-analysis. Public Health Nurs 2024; 41:476-486. [PMID: 38468509 DOI: 10.1111/phn.13298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 01/25/2024] [Accepted: 02/22/2024] [Indexed: 03/13/2024]
Abstract
BACKGROUND Hepatocellular carcinoma (HCC) is the sixth most common cancer worldwide and the third leading cause of cancer mortality. HCC has high morbidity, high mortality, and low survival rates. Screening is one of the most significant methods of lowering incidence and death while also increasing survival. OBJECTIVES The aim of this study was to identify the facilitators and barriers to participation in HCC screening among high-risk populations. METHODS A comprehensive and systematic search was undertaken in PubMed, Web of Science, MEDLINE, EMBACE, EBSCOhost and the Cochrane Library. A combination of synonyms of the keywords including HCC, screening, factors and adherence were used for searching. Studies addressing the facilitators and barriers to HCC screening compliance in at-risk individuals were included. Data were synthesized using Review Manager version 5.4. A random/fixed effects model meta-analysis was performed to estimate the pooled data and expressed with odds ratio (OR) and 95% confidence interval (CI). RESULTS A total of seven articles met the inclusion criteria. Qualitative (n = 1) and quantitative (n = 6) studies using various types of surgery were conducted. The most commonly mentioned barriers were insufficient knowledge and awareness of HCC screening, unawareness of the necessity for early detection of HCC and lack of physician recommendation. A meta-analysis of seven studies showed that individuals with a family history of HCC increased screening uptake by nearly three times (OR: 2.69, 95% CI: 1.93, 3.75). Other most frequently reported facilitators include age, education level, and perceived risk et al. CONCLUSIONS Many barriers to HCC screening were found. Meanwhile, this review points out that improving the awareness of high-risk populations toward HCC screening is expected to enhance compliance, thereby promoting early diagnosis of liver cancer, reducing mortality, and alleviating the burden of HCC.
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Affiliation(s)
- Ge-Hui Feng
- Department of International and Humanistic Nursing, Hunan Science Popularization Education Base, School of Nursing, Hengyang Medical School, University of South China, Hengyang, China
| | - Qian-Qian Yue
- Department of International and Humanistic Nursing, Hunan Science Popularization Education Base, School of Nursing, Hengyang Medical School, University of South China, Hengyang, China
| | - Ke-Hao Zhao
- Department of International and Humanistic Nursing, Hunan Science Popularization Education Base, School of Nursing, Hengyang Medical School, University of South China, Hengyang, China
| | - Tong Peng
- Department of International and Humanistic Nursing, Hunan Science Popularization Education Base, School of Nursing, Hengyang Medical School, University of South China, Hengyang, China
| | - Tian Tang
- Department of International and Humanistic Nursing, Hunan Science Popularization Education Base, School of Nursing, Hengyang Medical School, University of South China, Hengyang, China
| | - Ying-Xue Sun
- Department of International and Humanistic Nursing, Hunan Science Popularization Education Base, School of Nursing, Hengyang Medical School, University of South China, Hengyang, China
| | - Xin-Ru Meng
- Department of International and Humanistic Nursing, Hunan Science Popularization Education Base, School of Nursing, Hengyang Medical School, University of South China, Hengyang, China
| | - Li-Li Huang
- Department of International and Humanistic Nursing, Hunan Science Popularization Education Base, School of Nursing, Hengyang Medical School, University of South China, Hengyang, China
| | - Xi Zeng
- Hunan Province Key Laboratory of Tumor Cellular & Molecular Pathology, Cancer Research Institute; Hengyang Medical School, University of South China, Hengyang, China
| | - Ying Zeng
- Department of International and Humanistic Nursing, Hunan Science Popularization Education Base, School of Nursing, Hengyang Medical School, University of South China, Hengyang, China
- Hunan Province Key Laboratory of Tumor Cellular & Molecular Pathology, Cancer Research Institute; Hengyang Medical School, University of South China, Hengyang, China
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Zhao KH, Chai XM, Song SY, Lin ZJ, Zhou YC. Structure Determination of Basic Phospholipase A(2) from the Venom of Agkistrodon halys Pallas in A New Monoclinic Crystal Form. Sheng Wu Hua Xue Yu Sheng Wu Wu Li Xue Bao (Shanghai) 2002; 33:409-414. [PMID: 12040414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
Basic phospholipase A(2) from the venom of Agkistrodon halys Pallas ( Agkistrodin blomhoffii brevicaudus ) exhibits hemolytic and anti-coagulant activities. A new monoclinic crystal form with four molecules per asymmetric unit was grown in the absence of n-octyl beta-o-glucopyranoside (beta-OG). The enzyme structure was determined by the molecular replacement method. The combined analysis of self- and cross- rotation function was used and non-crystallographic symmetry restraints were imposed to the structure refinement. The final model gave an acceptable crystallographic R factor and reasonable stereochemistry. Two molecules formed an interfacial-recognition-site linked dimer and two such dimers constituted a tetramer having pseudo 222 symmetry. Structural comparison with previously reported monoclinic forms, in which beta-OG was bound, showed that the variation of crystallization conditions had effects on the crystal packing, leading to significant changes of the cell parameters. Nevertheless, the structures of both the dimer and tetramer in the two crystal forms closely resembled to each other, indicating that the oligomers found in the monoclinic crystal forms were stable.
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Affiliation(s)
- Ke-Hao Zhao
- National Laboratory of Biomacromolecules, Institute of Biophysics, the Chinese Academy of Sciences, Beijing 100101, China.
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Storf M, Parbel A, Meyer M, Strohmann B, Scheer H, Deng MG, Zheng M, Zhou M, Zhao KH. Chromophore attachment to biliproteins: specificity of PecE/PecF, a lyase-isomerase for the photoactive 3(1)-cys-alpha 84-phycoviolobilin chromophore of phycoerythrocyanin. Biochemistry 2001; 40:12444-56. [PMID: 11591166 DOI: 10.1021/bi010776s] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
PecE and PecF, the products of two phycoerythrocyanin lyase genes (pecE and pecF) of Mastigocladus laminosus (Fischerella), catalyze two reactions: (1) the regiospecific addition of phycocyanobilin (PCB) to Cys-alpha 84 of the phycoerythrocyanin alpha-subunit (PecA), and (2) the Delta 4-->Delta 2 isomerization of the PCB to the phycoviolobilin (PVB)-chromophore [Zhao et al. (2000) FEBS Lett. 469, 9-13]. The alpha-apoprotein (PecA) as well PecE and PecF were overexpressed from two strains of M. laminosus, with and without His-tags. The products of the spontaneous addition of PCB to PecA, and that of the reaction catalyzed by PecE/F, were characterized by their photochemistry and by absorption, fluorescence, circular dichroism of the four states obtained by irradiation with light (15-Z/E isomers of the chromophore) and/or modification of Cys-alpha 98/99 with thiol-directed reagents. The spontaneous addition leads to a 3(1)-Cys-PCB adduct, which is characteristic of allophycocyanins and phycocyanins, while the addition catalyzed by PecE and PecF leads to a 3(1)-Cys-PVB adduct which after purification was identical to alpha-PEC. The specificity and kinetics of the chromophore additions were investigated with respect to the structure of the bilin substrate: The 3-ethylidene-bilins, viz., PCB, its 18-vinyl analogue phytochromobilin, phycoerythrobilin and its dimethylester, react spontaneously to yield the conventional addition products (3-H, 3(1)-Cys), while the 3-vinyl-substituted bilins, viz., bilirubin and biliverdin, were inactive. Only phycocyanobilin and phytochromobilin are substrates to the addition-isomerization reaction catalyzed by PecE/F. The slow spontaneous addition of phycoerythrobilin is not influenced, and there is in particular no catalyzed isomerization to urobilin.
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Affiliation(s)
- M Storf
- Botanisches Institut, Universität München, Germany
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Zhao KH, Deng MG, Zheng M, Zhou M, Parbel A, Storf M, Meyer M, Strohmann B, Scheer H. Novel activity of a phycobiliprotein lyase: both the attachment of phycocyanobilin and the isomerization to phycoviolobilin are catalyzed by the proteins PecE and PecF encoded by the phycoerythrocyanin operon. FEBS Lett 2000; 469:9-13. [PMID: 10708746 DOI: 10.1016/s0014-5793(00)01245-x] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The structure of phycoviolobilin, the photoactive chromophore of alpha-phycoerythrocyanin, is incompatible with a chromophore ligation to the apoprotein via SH-addition (cysteine) to a Delta3, 3(1)-double bond of the phycobilin. The two putative phycoerythrocyanin lyase genes of Mastigocladus laminosus, pecE and pecF, were overexpressed in Escherichia coli. Their action has been studied on the addition reaction of phycocyanobilin to apo-alpha-phycoerythrocyanin (PecA). In the absence of the components of alpha-PEC-phycoviolobilin lyase PecE and PecF, or in the presence of only one of them, phycocyanobilin binds covalently to PecA forming a fluorescent chromoprotein with a red-shifted absorption (lambda(max)=641 nm) and low photoactivity (<10%). In the presence of both PecE and PecF, a chromoprotein forms which by its absorption (lambda(max)=565 nm) and high photoreversible photochromism (100% type I) has been identified as integral alpha-phycoerythrocyanin. We conclude that PecE and PecF jointly catalyze not only the addition of phycocyanobilin to PecA, but also its isomerization to the native phycoviolobilin chromophore.
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Affiliation(s)
- K H Zhao
- College of Life Sciences, Wuhan University, Wuhan, PR China.
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