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László L, Kurilla A, Takács T, Kudlik G, Koprivanacz K, Buday L, Vas V. Recent Updates on the Significance of KRAS Mutations in Colorectal Cancer Biology. Cells 2021; 10:667. [PMID: 33802849 PMCID: PMC8002639 DOI: 10.3390/cells10030667] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 03/03/2021] [Accepted: 03/10/2021] [Indexed: 12/17/2022] Open
Abstract
The most commonly mutated isoform of RAS among all cancer subtypes is KRAS. In this review, we focus on the special role of KRAS mutations in colorectal cancer (CRC), aiming to collect recent data on KRAS-driven enhanced cell signalling, in vitro and in vivo research models, and CRC development-related processes such as metastasis and cancer stem cell formation. We attempt to cover the diverse nature of the effects of KRAS mutations on age-related CRC development. As the incidence of CRC is rising in young adults, we have reviewed the driving forces of ageing-dependent CRC.
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Affiliation(s)
- Loretta László
- Research Centre for Natural Sciences, Institute of Enzymology, 1051 Budapest, Hungary; (L.L.); (A.K.); (T.T.); (G.K.); (K.K.); (L.B.)
| | - Anita Kurilla
- Research Centre for Natural Sciences, Institute of Enzymology, 1051 Budapest, Hungary; (L.L.); (A.K.); (T.T.); (G.K.); (K.K.); (L.B.)
| | - Tamás Takács
- Research Centre for Natural Sciences, Institute of Enzymology, 1051 Budapest, Hungary; (L.L.); (A.K.); (T.T.); (G.K.); (K.K.); (L.B.)
| | - Gyöngyi Kudlik
- Research Centre for Natural Sciences, Institute of Enzymology, 1051 Budapest, Hungary; (L.L.); (A.K.); (T.T.); (G.K.); (K.K.); (L.B.)
| | - Kitti Koprivanacz
- Research Centre for Natural Sciences, Institute of Enzymology, 1051 Budapest, Hungary; (L.L.); (A.K.); (T.T.); (G.K.); (K.K.); (L.B.)
| | - László Buday
- Research Centre for Natural Sciences, Institute of Enzymology, 1051 Budapest, Hungary; (L.L.); (A.K.); (T.T.); (G.K.); (K.K.); (L.B.)
- Department of Medical Chemistry, Semmelweis University Medical School, 1071 Budapest, Hungary
| | - Virag Vas
- Research Centre for Natural Sciences, Institute of Enzymology, 1051 Budapest, Hungary; (L.L.); (A.K.); (T.T.); (G.K.); (K.K.); (L.B.)
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Ounissi D, Weslati M, Boughriba R, Hazgui M, Bouraoui S. Clinicopathological characteristics and mutational profile of KRAS and NRAS in Tunisian patients with sporadic colorectal cancer. Turk J Med Sci 2021; 51:148-158. [PMID: 32892548 PMCID: PMC7991861 DOI: 10.3906/sag-2003-42] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Accepted: 08/31/2020] [Indexed: 12/13/2022] Open
Abstract
Background/aim Colorectal cancer (CRC) is a major public health problem worldwide and in Tunisia due to its increasing rate of incidence.
KRAS
and
NRAS
mutations have become a pivotal part of CRC diagnosis, given their association to treatment resistance with antiepidermal growth factor receptor (EGFR) monoclonal antibodies. In this study, we aimed to screen for mutations in
KRAS
and
NRAS
genes in Tunisian patients with CRC and explore their correlations with clinicopathological features. Materials and methods AmoyDx
KRAS
and
NRAS
mutation real-time PCR kits were used to screen for mutations in
KRAS
(exon 2) and
NRAS
(exons 2, 3, and 4) in 96 CRC tumors. Results KRAS
exon 2 mutations were found in 41.7% (40/96) of the patients. Codon 12’s most abundant mutations were G12D and G12V, followed by G12A, while G13D is the predominant mutation in codon 13.
KRAS
exon 2 mutations were associated with older patients (P = 0.029), left-sided tumors (P = 0.037), and greater differentiation (P = 0.044). The prevalence rate of
NRAS
mutations was 7.3%, mostly in exon 2. These mutations were associated with early stages of the disease (P = 0.039) and the absence of lymph node metastasis (P = 0.045). Conclusion It can be inferred from this study that Tunisian CRC patients have a similar frequency of
KRAS
and
NRAS
mutations compared to those observed in other populations. Consequently, screening for
KRAS
and
NRAS
mutations is crucial for the orientation of therapies and the selection of appropriate candidates, while also helping to avoid unnecessary toxicity and increased costs for patients.
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Affiliation(s)
- Donia Ounissi
- Laboratory of Colorectal Cancer Research UR12SP14, Mongi Slim Hospital, La Marsa, Tunisia,Faculty of Sciences of Tunis, University of Tunis El Manar, Tunis, Tunisia
| | - Marwa Weslati
- Laboratory of Colorectal Cancer Research UR12SP14, Mongi Slim Hospital, La Marsa, Tunisia,Faculty of Sciences of Tunis, University of Tunis El Manar, Tunis, Tunisia
| | - Rahma Boughriba
- Laboratory of Colorectal Cancer Research UR12SP14, Mongi Slim Hospital, La Marsa, Tunisia,Faculty of Sciences of Tunis, University of Tunis El Manar, Tunis, Tunisia
| | - Meriam Hazgui
- Laboratory of Colorectal Cancer Research UR12SP14, Mongi Slim Hospital, La Marsa, Tunisia,Faculty of Sciences of Tunis, University of Tunis El Manar, Tunis, Tunisia
| | - Saadia Bouraoui
- Laboratory of Colorectal Cancer Research UR12SP14, Mongi Slim Hospital, La Marsa, Tunisia,Department of Pathology and Cytology, Mongi Slim Hospital, La Marsa, Tunisia
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Enhanced asymmetric blocked qPCR method for affordable detection of point mutations in KRAS oncogene. Anal Bioanal Chem 2021; 413:2961-2969. [PMID: 33619642 DOI: 10.1007/s00216-021-03229-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 02/05/2021] [Accepted: 02/09/2021] [Indexed: 10/22/2022]
Abstract
An accurate genetic diagnostic is key for adequate patient management and the suitability of healthcare systems. The scientific challenge lies in developing methods to discriminate those patients with certain genetic variations present in tumor cells at low concentrations. We report a method called enhanced asymmetric blocked qPCR (EAB-qPCR) that promotes the blocker annealing against the primer-template hybrid controlling thermal cycling and reaction conditions with nonmodified oligonucleotides. Real-time fluorescent amplification curves of wild-type alleles were delayed by about eight cycles for EAB-qPCR, compared to conventional blocked qPCR approaches. This method reduced the amplification of native DNA variants (blocking percentage 99.7%) and enabled the effective enrichment of low-level DNA mutations. Excellent performance was estimated for the detection of mutated alleles in sensitivity (up to 0.5% mutant/total DNA) and reproducibility terms, with a relative standard deviation below 2.8%. The method was successfully applied to the mutational analysis of metastatic colorectal carcinoma from biopsied tissues. The determined single-nucleotide mutations in the KRAS oncogene (codon 12-13) totally agreed with those obtained from next-generation sequencing. EAB-qPCR is an accurate cheap method and can be easily incorporated into daily routine to detect mutant alleles. Hence, these features are especially interesting to facilitate the diagnosis and prognosis of several clinical diseases.
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4
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Li J, Tang Q, Dong W, Wang Y. CircBACH1/let-7a-5p axis enhances the proliferation and metastasis of colorectal cancer by upregulating CREB5 expression. J Gastrointest Oncol 2020; 11:1186-1199. [PMID: 33456992 DOI: 10.21037/jgo-20-498] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Background In this study, we investigated the influences of circBACH1 on the proliferation, metastasis, migration, and apoptosis of human colorectal cancer LoVo cells and explored the molecular mechanism of its effect to guide the clinical diagnosis, treatment, and follow-up of colorectal cancer. Methods The expression of circBACH1 in colorectal cancer cells was measured to determine the high expression of BACH1 in colorectal cancer (CRC). LoVo was selected for a follow-up experiment. Then, quantificational reverse transcription-polymerase chain reaction (qRT-PCR) and biotinylated let-7a-5p probes were used to confirm that the expression of let-7a-5p was lowered in colorectal cancer, and let-7a-5p was the downstream target of BACH1 in CRC. Cell counting Kit-8 (CCK-8), Transwell, and wound repair experiments confirmed that BACH1 augmented the proliferation, migration, and metastasis of CRC by regulating let-7a-5p. The apoptosis rate was measured by flow cytometry. It was concluded that BACH1 inhibited apoptosis by regulating let-7a-5p in CRC. The results of the bioinformatics analysis showed that CREB5 was overexpressed in CRC by qRT-PCR and Western blot. The results of qRT-PCR, CCK-8 assay, Transwell assay, and flow cytometry showed that let-7a-5p inhibited the proliferation, migration, and invasion of CRC cells through targeting CREB5 and augmented cell apoptosis. According to tumor growth and the determination of CREB5 by Western blot, BACH1 can affect the proliferation of CRC cells through CREB5. Results Overall, our study confirmed that BACH1 and CREB5 increased, while the expression of let-7a-5p was lowered in colorectal cancer cells. These different expressions enhance the proliferation, metastasis, and migration of colorectal cancer cells and inhibit colorectal cancer cells' apoptosis. Conclusions Our study clearly illustrates the molecular mechanism of circBACH1 acting on colorectal cancer, which can be used as a therapeutic target to augment colorectal cancer treatment.
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Affiliation(s)
- Jutang Li
- Key Laboratory of Signaling Regulation and Targeting Therapy of Liver Cancer, the Second Military Medical University, Shanghai, China.,Department of Gastroenterology, Tongren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Qian Tang
- Tianjin Key Laboratory of Molecular Drug Research, Tianjin International Joint Academy of Biomedicine, Tianjin, China
| | - Wei Dong
- Key Laboratory of Signaling Regulation and Targeting Therapy of Liver Cancer, the Second Military Medical University, Shanghai, China.,Department of Pathology, Eastern Hepatobiliary Surgery Hospital, the Second Military Medical University, Shanghai, China
| | - Yizhou Wang
- The Fourth Department of Hepatic Surgery, Eastern Hepatobiliary Surgery Hospital, the Second Military Medical University, Shanghai, China
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5
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Lee DJ, Mai J, Huang TJ. Microfluidic approaches for cell-based molecular diagnosis. BIOMICROFLUIDICS 2018; 12:051501. [PMID: 30271515 PMCID: PMC6138474 DOI: 10.1063/1.5030891] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Accepted: 08/27/2018] [Indexed: 06/08/2023]
Abstract
The search for next-generation biomarkers has enabled cell-based diagnostics in a number of disciplines ranging from oncology to pharmacogenetics. However, cell-based diagnostics are still far from clinical reality due to the complex assays and associated protocols which typically require cell isolation, lysis, DNA extraction, amplification, and detection steps. Leveraging recent advances in microfluidics, many biochemical assays have been translated onto microfluidic platforms. We have compared and summarized recent advances in modular approaches toward the realization of fully-integrated, cell-based molecular diagnostics for clinical and point-of-care applications.
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Affiliation(s)
- Dong Jun Lee
- Department of Biomedical Engineering, Duke University, Durham, North Carolina 27708, USA
| | - John Mai
- Alfred E. Mann Institute for Biomedical Engineering, University of Southern California, Los Angeles, California 90089, USA
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6
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Xiao N, Tang YT, Li ZS, Cao R, Wang R, Zou JM, Pei J. Performance of probe polymerization-conjunction-agarose gel electrophoresis in the rapid detection of KRAS gene mutation. Genet Mol Biol 2018; 41:555-561. [PMID: 30080912 PMCID: PMC6136376 DOI: 10.1590/1678-4685-gmb-2017-0197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Accepted: 12/30/2017] [Indexed: 11/22/2022] Open
Abstract
This study aimed to develop a simple and rapid method to detect KRAS gene mutations for conventional clinical applications under laboratory conditions. The genotype of mutation sites was determined based on the occurrence of target bands in the corresponding lanes of the reaction tubes through polymerization-conjunction of the probes, probe purification and amplification, and agarose gel electrophoresis. Circulating DNA samples were obtained from the plasma of 72 patients with lung cancer, which were identified based on six mutation sites (G12S, G12R, G12C, G12D, G12A, and G12V) of codon 12 of the KRAS gene. The detection results were compared with direct sequencing data. The proposed detection method is characterized by simple operation, high specificity, and high sensitivity (2%). This method can detect the mutations of three samples at G12S, G12R, and G12A. In the direct sequencing spectra of these samples, the genotype could not be determined due to the lack of evident sequencing peaks that correspond to the basic group of mutations. In conclusion, a simple and rapid method was established based on probe polymerization-conjunction-agarose gel electrophoresis for detecting KRAS gene mutations. This method can be applied to the conventional mutation detection of inhomogeneous samples.
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Affiliation(s)
- Na Xiao
- Medical College of Hubei University of Arts and Science, Xiangyang, China
| | - Yi-Tong Tang
- Medical College of Hubei University of Arts and Science, Xiangyang, China
| | - Zhi-Shan Li
- Department of Clinical Laboratory, Affiliated Hospital of Hubei University of Arts and Science, Xiangyang, China
| | - Rui Cao
- Department of Internal Medicine, Maternal and Child Health Care Hospital of Dongguan, Dongguan, China
| | - Rong Wang
- Department of Clinical Laboratory, Affiliated Hospital of Hubei University of Arts and Science, Xiangyang, China
| | - Jiu-Ming Zou
- Department of Clinical Laboratory, Affiliated Hospital of Hubei University of Arts and Science, Xiangyang, China
| | - Jiao Pei
- Department of Clinical Laboratory, Affiliated Hospital of Hubei University of Arts and Science, Xiangyang, China
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7
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Pei X, Lai T, Tao G, Hong H, Liu F, Li N. Ultraspecific Multiplexed Detection of Low-Abundance Single-Nucleotide Variants by Combining a Masking Tactic with Fluorescent Nanoparticle Counting. Anal Chem 2018; 90:4226-4233. [PMID: 29504392 DOI: 10.1021/acs.analchem.8b00685] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
To be able to detect simultaneously multiple single-nucleotide variants (SNVs) with both ultrahigh specificity and low-abundance sensitivity is of pivotal importance for molecular diagnostics and biological research. In this contribution, we for the first time developed a multiplex SNV detection method that combines the masking tactic with fluorescent nanoparticle (FNP) counting based on the sandwich design. The method presents a rivaling performance due to its advantageous features: the masking reagent was designed to hybridize with an extremely large amount of the wild-type sequence to render the assay with high specificity; FNP counting provides a sensitive multiplexed SNV detection; the sandwich design facilitates an easy separation to make the detection free of interferences from the matrix. For single SNV target discrimination, including the 6 most frequently occurring DNA KRAS gene mutations and 2 possible RNA KRAS gene mutations as well as 11 artificial mutations, the discrimination factor ranged from 204 to 1177 with the median being 545. Among the tested 19 SNVs, abundances as low as 0.05% were successfully identified in 14 cases, and an abundance as low as 0.1% was identified for the remaining 5 cases. For multiplexed detection of SNVs in the KRAS gene, abundances as low as 0.05-0.1% were achieved for multiple SNVs occurring at the same and different codons. As low as 0.05% low-abundance detection sensitivity was also achieved for PCR amplicons of human genomic DNA extracted from cell samples. This proposed method presents the potential for ultrahigh specific multiplexed detection of SNVs with low-abundance detection capability, which may be applied to practical applications.
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Affiliation(s)
- Xiaojing Pei
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, Institute of Analytical Chemistry, College of Chemistry and Molecular Engineering , Peking University , Beijing 100871 , P. R. China
| | - Tiancheng Lai
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, Institute of Analytical Chemistry, College of Chemistry and Molecular Engineering , Peking University , Beijing 100871 , P. R. China
| | - Guangyu Tao
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, Institute of Analytical Chemistry, College of Chemistry and Molecular Engineering , Peking University , Beijing 100871 , P. R. China
| | - Hu Hong
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, Institute of Analytical Chemistry, College of Chemistry and Molecular Engineering , Peking University , Beijing 100871 , P. R. China
| | - Feng Liu
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, Institute of Analytical Chemistry, College of Chemistry and Molecular Engineering , Peking University , Beijing 100871 , P. R. China
| | - Na Li
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, Institute of Analytical Chemistry, College of Chemistry and Molecular Engineering , Peking University , Beijing 100871 , P. R. China
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8
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A Low-Cost Palmtop High-Speed Capillary Electrophoresis Bioanalyzer with Laser Induced Fluorescence Detection. Sci Rep 2018; 8:1791. [PMID: 29379053 PMCID: PMC5789010 DOI: 10.1038/s41598-018-20058-0] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Accepted: 01/12/2018] [Indexed: 12/28/2022] Open
Abstract
In this work, we developed a miniaturized palmtop high-speed capillary electrophoresis (CE) system integrating whole modules, including picoliter-scale sample injection, short capillary-based fast CE, high-voltage power supply, orthogonal laser induced fluorescence (LIF) detection, battery, system control, on-line data acquisition, processing, storage, and display modules. A strategy of minimalist miniaturization combining minimal system design and low-cost system construction was adopted to achieve the instrument miniaturization with extremely low cost, which is differing from the current microfabrication strategy used in most reported miniaturized CE systems. With such a strategy, the total size of the bioanalyzer was minimized to 90 × 75 × 77 mm (length × width × height) and the instrument cost was reduced to ca. $500, which demonstrated the smallest and lowest-cost CE instrument with LIF detection in so far reported systems. The present bioanalyzer also exhibited comparable analytical performances to previously-reported high-speed CE systems. A limit of detection of 1.02 nM sodium fluorescein was obtained. Fast separations were achieved for multiple types of samples as amino acids, amino acid enantiomers, DNA fragments, and proteins with high efficiency. We applied this instrument in colorectal cancer diagnosis for detecting KRAS mutation status by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method.
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9
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Wong NKY, Shenoi RA, Abbina S, Chafeeva I, Kizhakkedathu JN, Khan MK. Nontransformed and Cancer Cells Can Utilize Different Endocytic Pathways To Internalize Dendritic Nanoparticle Variants: Implications on Nanocarrier Design. Biomacromolecules 2017; 18:2427-2438. [DOI: 10.1021/acs.biomac.7b00590] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Nelson K. Y. Wong
- Department
of Experimental Therapeutics, British Columbia Cancer Research Centre;
Radiation Oncology, British Columbia Cancer Agency − Vancouver Centre, 675 West 10th Avenue, Vancouver, BC, Canada V5Z 1L3
| | - Rajesh A. Shenoi
- Centre
for Blood Research, Department of Pathology and Laboratory Medicine,
Department of Chemistry, University of British Columbia, Vancouver, Canada V6T 2B5
| | - Srinivas Abbina
- Centre
for Blood Research, Department of Pathology and Laboratory Medicine,
Department of Chemistry, University of British Columbia, Vancouver, Canada V6T 2B5
| | - Irina Chafeeva
- Centre
for Blood Research, Department of Pathology and Laboratory Medicine,
Department of Chemistry, University of British Columbia, Vancouver, Canada V6T 2B5
| | - Jayachandran N. Kizhakkedathu
- Centre
for Blood Research, Department of Pathology and Laboratory Medicine,
Department of Chemistry, University of British Columbia, Vancouver, Canada V6T 2B5
| | - Mohamed K. Khan
- Department
of Experimental Therapeutics, British Columbia Cancer Research Centre;
Radiation Oncology, British Columbia Cancer Agency − Vancouver Centre, 675 West 10th Avenue, Vancouver, BC, Canada V5Z 1L3
- Radiation
Oncology, Banner MD Anderson Cancer Center, Gilbert, AZ 85234, USA
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10
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Tsai MH, Pan CH, Peng CL, Shieh MJ. Panitumumab-Conjugated Pt-Drug Nanomedicine for Enhanced Efficacy of Combination Targeted Chemotherapy against Colorectal Cancer. Adv Healthc Mater 2017; 6. [PMID: 28418176 DOI: 10.1002/adhm.201700111] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Revised: 02/22/2017] [Indexed: 11/10/2022]
Abstract
Targeted combination chemotherapy (TCT) has recently been used to increase the induction of tumor cell death. In particular, the combination of Panitumumab and the platinum (Pt)-derived chemotherapeutic drug Oxaliplatin is clinically effective against KRAS and BRAF wild-type colorectal cancer (CRC) cells that overexpress epidermal growth factor receptors, and significantly greater efficacy is observed than with either drug alone. However, low accumulation of Pt drug in tumor sites prevents achievement of ideal efficacy. To develop an alternative drug therapy that achieves the ideal efficacy of TCT, the novel nanomedicine NANOPt-Pan using self-assembled dichloro(1,2-diaminocyclohexane)Pt(II)-modified Panitumumab is generated. Treatments with NANOPt-Pan lead to significant accumulation of Pt drug and Panitumumab in tumors, reflecting enhanced permeability and retention effect, active targeting, and sustained circulation of the Pt drug in the blood. In addition, NANOPt-Pan has excellent in vivo anti-CRC efficacy. These data indicate that NANOPt-Pan has high potential as a candidate nanomedicine for CRC.
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Affiliation(s)
- Ming-Hsien Tsai
- Institute of Biomedical Engineering; College of Medicine and College of Engineering; National Taiwan University; No. 1, Section 1, Jen-Ai Road Taipei 100 Taiwan
| | - Chao-Hsuan Pan
- Institute of Biomedical Engineering; College of Medicine and College of Engineering; National Taiwan University; No. 1, Section 1, Jen-Ai Road Taipei 100 Taiwan
| | - Cheng-Liang Peng
- Isotope Application Division; Institute of Nuclear Energy Research; P.O. Box 3-27 Longtan Taoyuan 325 Taiwan
| | - Ming-Jium Shieh
- Institute of Biomedical Engineering; College of Medicine and College of Engineering; National Taiwan University; No. 1, Section 1, Jen-Ai Road Taipei 100 Taiwan
- Department of Oncology; National Taiwan University Hospital and College of Medicine; #7, Chung-Shan South Road Taipei 100 Taiwan
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11
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Anazawa T, Uchiho Y, Yokoi T, Chalkidis G, Yamazaki M. A simple and highly sensitive spectroscopic fluorescence-detection system for multi-channel plastic-microchip electrophoresis based on side-entry laser-beam zigzag irradiation. LAB ON A CHIP 2017; 17:2235-2242. [PMID: 28585967 DOI: 10.1039/c7lc00448f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A five-color fluorescence-detection system for eight-channel plastic-microchip electrophoresis was developed. In the eight channels (with effective electrophoretic lengths of 10 cm), single-stranded DNA fragments were separated (with single-base resolution up to 300 bases within 10 min), and seventeen-loci STR genotyping for forensic human identification was successfully demonstrated. In the system, a side-entry laser beam is passed through the eight channels (eight A channels), with alternately arrayed seven sacrificial channels (seven B channels), by a technique called "side-entry laser-beam zigzag irradiation." Laser-induced fluorescence from the eight A channels and Raman-scattered light from the seven B channels are then simultaneously, uniformly, and spectroscopically detected, in the direction perpendicular to the channel array plane, through a transmission grating and a CCD camera. The system is therefore simple and highly sensitive. Because the microchip is fabricated by plastic-injection molding, it is inexpensive and disposable and thus suitable for actual use in various fields.
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Affiliation(s)
| | | | | | | | - Motohiro Yamazaki
- Hitachi High-Technologies Corporation, Science & Medical Systems Business Group, Japan
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12
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13
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Dolatkhah R, Somi MH, Kermani IA, Farassati F, Dastgiri S. A novel KRAS gene mutation report in sporadic colorectal cancer, from Northwest of Iran. Clin Case Rep 2017; 5:338-341. [PMID: 28265402 PMCID: PMC5331244 DOI: 10.1002/ccr3.779] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Revised: 09/19/2016] [Accepted: 11/23/2016] [Indexed: 12/14/2022] Open
Abstract
While the role of KRAS gene mutations has been widely accepted for predicting responses to anti‐EGFR therapy in patients with colorectal cancer, although this study was based on observation of a single case it gives hope that some KRAS gene mutation may have favorable prognosis. More studies are required on patients with similar mutation to validate this finding.
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Affiliation(s)
- Roya Dolatkhah
- Hematology and Oncology Research Center Tabriz University of Medical Sciences Tabriz Iran
| | - Mohammad Hossein Somi
- Liver and Gastrointestinal Diseases Research Center Tabriz University of Medical Sciences Tabriz Iran
| | - Iraj Asvadi Kermani
- Hematology and Oncology Research Center Tabriz University of Medical Sciences Tabriz Iran
| | - Faris Farassati
- The University of Kansas Medical School-Molecular Medicine Laboratory Kansas City Kansas USA
| | - Saeed Dastgiri
- Hematology and Oncology Research Center Tabriz University of Medical Sciences Tabriz Iran; Tabriz Health Services Research Center Tabriz University of Medical Sciences Tabriz Iran
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14
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Li WM, Hu TT, Zhou LL, Feng YM, Wang YY, Fang J. Highly sensitive detection of the PIK3CA (H1047R) mutation in colorectal cancer using a novel PCR-RFLP method. BMC Cancer 2016; 16:454. [PMID: 27405731 PMCID: PMC4941018 DOI: 10.1186/s12885-016-2493-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Accepted: 06/28/2016] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND The PIK3CA (H1047R) mutation is considered to be a potential predictive biomarker for EGFR-targeted therapies. In this study, we developed a novel PCR-PFLP approach to detect the PIK3CA (H1047R) mutation in high effectiveness. METHODS A 126-bp fragment of PIK3CA exon-20 was amplified by PCR, digested with FspI restriction endonuclease and separated by 3 % agarose gel electrophoresis for the PCR-RFLP analysis. The mutant sequence of the PIK3CA (H1047R) was spiked into the corresponding wild-type sequence in decreasing ratios for sensitivity analysis. Eight-six cases of formalin-fixed paraffin-embedded colorectal cancer (CRC) specimens were subjected to PCR-RFLP to evaluate the applicability of the method. RESULTS The PCR-RFLP method had a capability to detect as litter as 0.4 % of mutation, and revealed 16.3 % of the PIK3CA (H1047R) mutation in 86 CRC tissues, which was significantly higher than that discovered by DNA sequencing (9.3 %). A positive association between the PIK3CA (H1047R) mutation and the patients' age was first found, except for the negative relationship with the degree of tumor differentiation. In addition, the highly sensitive detection of a combinatorial mutation of PIK3CA, KRAS and BRAF was achieved using individual PCR-RFLP methods. CONCLUSIONS We developed a sensitive, simple and rapid approach to detect the low-abundance PIK3CA (H1047R) mutation in real CRC specimens, providing an effective tool for guiding cancer targeted therapy.
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Affiliation(s)
- Wan-Ming Li
- Department of Cell Biology, Key Laboratory of Cell Biology, Ministry of Public Health, and Key Laboratory of Medical Cell Biology, Ministry of Education, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning Province, 110122, People's Republic of China
| | - Ting-Ting Hu
- Department of Cell Biology, Key Laboratory of Cell Biology, Ministry of Public Health, and Key Laboratory of Medical Cell Biology, Ministry of Education, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning Province, 110122, People's Republic of China
| | - Lin-Lin Zhou
- Department of Cell Biology, Key Laboratory of Cell Biology, Ministry of Public Health, and Key Laboratory of Medical Cell Biology, Ministry of Education, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning Province, 110122, People's Republic of China
| | - Yi-Ming Feng
- Department of Cell Biology, Key Laboratory of Cell Biology, Ministry of Public Health, and Key Laboratory of Medical Cell Biology, Ministry of Education, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning Province, 110122, People's Republic of China
| | - Yun-Yi Wang
- Department of Cell Biology, Key Laboratory of Cell Biology, Ministry of Public Health, and Key Laboratory of Medical Cell Biology, Ministry of Education, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning Province, 110122, People's Republic of China
| | - Jin Fang
- Department of Cell Biology, Key Laboratory of Cell Biology, Ministry of Public Health, and Key Laboratory of Medical Cell Biology, Ministry of Education, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning Province, 110122, People's Republic of China.
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15
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Gebauer A, Schmidt S, Hoffmann W. Status and perspective of lab-on-a-chip systems for common diseases: a systematic review from 2003 to 2013. Per Med 2016; 13:71-91. [PMID: 29749869 DOI: 10.2217/pme.15.42] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
BACKGROUND Lab-on-a-chip systems (LOCs) are a useful aid for the individualization of therapeutic algorithms at the point-of-care. MATERIALS & METHODS We performed a systematic literature review on LOCs for diseases with a global impact for healthcare. RESULTS A total of 1007 articles matched the previously specified search criteria, thereof 65 studies could be included in this review. A total of 55 different LOCs were evaluated, most for diagnosis or monitoring of cancer (n = 24). For other diseases we found considerably less analyzed LOCs. The analytical performance of the LOCs was usually very good, 37 (67%) LOCs had a sensitivity higher than 90%. CONCLUSION Although LOC systems performance has been positively evaluated in the great majority of studies, the testing was mostly limited to the research laboratory setting rather than real-world scenarios.
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Affiliation(s)
- Alexander Gebauer
- Institute for Community Medicine, Section Epidemiology of Healthcare & Community Health, University Medicine Greifswald, Germany
| | - Silke Schmidt
- Institute for Community Medicine, Section Epidemiology of Healthcare & Community Health, University Medicine Greifswald, Germany
| | - Wolfgang Hoffmann
- Institute for Community Medicine, Section Epidemiology of Healthcare & Community Health, University Medicine Greifswald, Germany
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16
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Deng Y, Yi L, Lin X, Lin L, Li H, Lin JM. A non-invasive genomic diagnostic method for bladder cancer using size-based filtration and microchip electrophoresis. Talanta 2015; 144:136-44. [DOI: 10.1016/j.talanta.2015.05.065] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2015] [Revised: 05/16/2015] [Accepted: 05/25/2015] [Indexed: 12/31/2022]
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17
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Dolatkhah R, Somi MH, Bonyadi MJ, Asvadi Kermani I, Farassati F, Dastgiri S. Colorectal cancer in iran: molecular epidemiology and screening strategies. J Cancer Epidemiol 2015; 2015:643020. [PMID: 25685149 PMCID: PMC4312646 DOI: 10.1155/2015/643020] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2014] [Revised: 12/05/2014] [Accepted: 12/15/2014] [Indexed: 12/22/2022] Open
Abstract
Purpose. The increasing incidence of colorectal cancer (CRC) in the past three decades in Iran has made it a major public health burden. This study aimed to report its epidemiologic features, molecular genetic aspects, survival, heredity, and screening pattern in Iran. Methods. A comprehensive literature review was conducted to identify the relevant published articles. We used medical subject headings, including colorectal cancer, molecular genetics, KRAS and BRAF mutations, screening, survival, epidemiologic study, and Iran. Results. Age standardized incidence rate of Iranian CRCs was 11.6 and 10.5 for men and women, respectively. Overall five-year survival rate was 41%, and the proportion of CRC among the younger age group was higher than that of western countries. Depending on ethnicity, geographical region, dietary, and genetic predisposition, mutation genes were considerably diverse and distinct among CRCs across Iran. The high occurrence of CRC in records of relatives of CRC patients showed that family history of CRC was more common among young CRCs. Conclusion. Appropriate screening strategies for CRC which is amenable to early detection through screening, especially in relatives of CRCs, should be considered as the first step in CRC screening programs.
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Affiliation(s)
- Roya Dolatkhah
- Liver and Gastrointestinal Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
- Hematology and Oncology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammad Hossein Somi
- Liver and Gastrointestinal Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | | | - Iraj Asvadi Kermani
- Hematology and Oncology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Faris Farassati
- Department of Medicine, The University of Kansas Medical School, Molecular Medicine Laboratory, KUMC, Kansas City, KS, USA
| | - Saeed Dastgiri
- Hematology and Oncology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
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18
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Progress in stacking techniques based on field amplification of capillary electrophoresis. Anal Bioanal Chem 2014; 406:6129-50. [DOI: 10.1007/s00216-014-8062-7] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2014] [Revised: 07/21/2014] [Accepted: 07/22/2014] [Indexed: 02/07/2023]
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19
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Lian DS, Zhao SJ. Capillary electrophoresis based on the nucleic acid detection in the application of cancer diagnosis and therapy. Analyst 2014; 139:3492-506. [DOI: 10.1039/c4an00400k] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
This review focuses on capillary electrophoresis-based nucleic acid detection as it is applied to cancer diagnosis and therapy, and provides an introduction to the drawbacks and future developments of analysis with CE.
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Affiliation(s)
- Dong-Sheng Lian
- School of Bioscience and Bioengineering
- South China University of Technology
- Guangzhou 510006, China
| | - Shu-Jin Zhao
- School of Bioscience and Bioengineering
- South China University of Technology
- Guangzhou 510006, China
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20
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Lack of association between let-7 binding site polymorphism rs712 and risk of nasopharyngeal carcinoma. Fam Cancer 2013; 13:93-7. [DOI: 10.1007/s10689-013-9681-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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21
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Li ZH, Pan XM, Han BW, Guo XM, Zhang Z, Jia J, Gao LB. A let-7 binding site polymorphism rs712 in the KRAS 3' UTR is associated with an increased risk of gastric cancer. Tumour Biol 2013; 34:3159-63. [PMID: 23729275 DOI: 10.1007/s13277-013-0885-x] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2013] [Accepted: 05/22/2013] [Indexed: 02/07/2023] Open
Abstract
Recently, single nucleotide polymorphisms in let-7 miRNA binding site in 3' untranslated region (UTR) of KRAS mRNA have been found to be associated with the cancer risk. In this study, we genotyped the frequency of KRAS rs712 to test its effect on gastric cancer (GC) risk in a hospital-based case-control study in a Chinese population, with 181 histologically confirmed GC patients and 674 cancer-free controls, using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) assay. The TT genotype of rs712 was associated with an increased risk of GC when taking GG genotype as a reference (adjusted odds ratio (OR) = 3.05, 95 % confidence interval (CI), 1.53-6.08). Similarly, the T allele of rs712 was associated with a statistically significant increase in susceptibility compared with G allele (adjusted OR = 1.44, 95 % CI, 1.10-1.90). Our data demonstrated that the T allele of the let-7 binding site polymorphism rs712 in KRAS 3' UTR was associated with a significantly increased risk of GC, suggesting that the KRAS rs712 polymorphism may be a genetic marker for the development of GC.
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Affiliation(s)
- Zhao-Hui Li
- Secondary Department of General Surgery, Luoyang Central Hospital Affiliated to Zhengzhou University, Luoyang, Henan, 471003, People's Republic of China
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