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Farasat M, Aalaei E, Kheirati Ronizi S, Bakhshi A, Mirhosseini S, Zhang J, Nguyen NT, Kashaninejad N. Signal-Based Methods in Dielectrophoresis for Cell and Particle Separation. BIOSENSORS 2022; 12:510. [PMID: 35884313 PMCID: PMC9313092 DOI: 10.3390/bios12070510] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 06/29/2022] [Accepted: 07/04/2022] [Indexed: 06/15/2023]
Abstract
Separation and detection of cells and particles in a suspension are essential for various applications, including biomedical investigations and clinical diagnostics. Microfluidics realizes the miniaturization of analytical devices by controlling the motion of a small volume of fluids in microchannels and microchambers. Accordingly, microfluidic devices have been widely used in particle/cell manipulation processes. Different microfluidic methods for particle separation include dielectrophoretic, magnetic, optical, acoustic, hydrodynamic, and chemical techniques. Dielectrophoresis (DEP) is a method for manipulating polarizable particles' trajectories in non-uniform electric fields using unique dielectric characteristics. It provides several advantages for dealing with neutral bioparticles owing to its sensitivity, selectivity, and noninvasive nature. This review provides a detailed study on the signal-based DEP methods that use the applied signal parameters, including frequency, amplitude, phase, and shape for cell/particle separation and manipulation. Rather than employing complex channels or time-consuming fabrication procedures, these methods realize sorting and detecting the cells/particles by modifying the signal parameters while using a relatively simple device. In addition, these methods can significantly impact clinical diagnostics by making low-cost and rapid separation possible. We conclude the review by discussing the technical and biological challenges of DEP techniques and providing future perspectives in this field.
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Affiliation(s)
- Malihe Farasat
- School of Electrical and Computer Engineering, College of Engineering, Tehran University, Tehran 14399-57131, Iran; (M.F.); (A.B.); (S.M.)
| | - Ehsan Aalaei
- School of Mechanical Engineering, Shiraz University, Shiraz 71936-16548, Iran; (E.A.); (S.K.R.)
| | - Saeed Kheirati Ronizi
- School of Mechanical Engineering, Shiraz University, Shiraz 71936-16548, Iran; (E.A.); (S.K.R.)
| | - Atin Bakhshi
- School of Electrical and Computer Engineering, College of Engineering, Tehran University, Tehran 14399-57131, Iran; (M.F.); (A.B.); (S.M.)
| | - Shaghayegh Mirhosseini
- School of Electrical and Computer Engineering, College of Engineering, Tehran University, Tehran 14399-57131, Iran; (M.F.); (A.B.); (S.M.)
| | - Jun Zhang
- Queensland Micro-Nanotechnology Centre, Griffith University, Nathan, QLD 4111, Australia; (J.Z.); (N.-T.N.)
| | - Nam-Trung Nguyen
- Queensland Micro-Nanotechnology Centre, Griffith University, Nathan, QLD 4111, Australia; (J.Z.); (N.-T.N.)
| | - Navid Kashaninejad
- Queensland Micro-Nanotechnology Centre, Griffith University, Nathan, QLD 4111, Australia; (J.Z.); (N.-T.N.)
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Luu Thi TH, Eichner A, Wohlrab J. Therapeutische Besonderheiten bei Erkrankungen der Mamillenhaut. DIE DERMATOLOGIE 2022; 73:873-879. [PMID: 35925215 PMCID: PMC9592625 DOI: 10.1007/s00105-022-05031-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Accepted: 06/22/2022] [Indexed: 11/25/2022]
Abstract
Die Mamillenregion ist durch besondere anatomische Verhältnisse charakterisiert und lässt sich aus dermatologischer Perspektive in Brusthaut, Haut des Brustwarzenhofes (Areola) und Haut der Brustwarze (Papilla mammae) unterteilen. Im klinischen Zusammenhang sind die Brustwarzen häufig während der Stillzeit durch mechanische Beanspruchung, Milieuänderung mit Mazeration durch den Milchfluss sowie durch mikrobielle Erreger alteriert. Zudem besteht hier die Gefahr der Entwicklung einer Mastitis puerperalis. Außerhalb der Schwangerschaft und Stillzeit finden sich gelegentlich an der Mamillenhaut Ekzemerkrankungen, häufig bei atopischer Disposition (atopisches Mamillenekzem) oder als irritatives Kontaktekzem („joggers nipple“). Seltener werden allergische Kontaktekzeme auf Konservierungsstoffe von Topika oder Metallen (Piercings) beobachtet. Auch im Rahmen einer Skabiesinfestation wird eine Beteiligung der Mamillen, insbesondere bei Frauen, regelmäßig beobachtet. Von großer klinischer Bedeutung sind seltene, präinvasive Läsionen eines Mammakarzinoms oder der Morbus Paget der Mamille vom extramammären Typ. Durch die besonderen anatomischen Gegebenheiten ist es naheliegend, dass bei der Anwendung von Topika sich auch spezifische Penetrationsbedingungen ableiten. Experimentelle Untersuchungen an Humanhaut ex vivo legen nahe, dass in Abhängigkeit von der Molmasse und der Löslichkeit des Arzneistoffs sowie des eingesetzten Vehikelsystems eine deutliche Zunahme der kutanen Bioverfügbarkeit, insbesondere an der Brustwarze selbst durch den transpapillären Diffusionsweg, auftreten kann. Dies sollte insbesondere bei der topischen Anwendung von Arzneistoffen mit bekanntem dosisabhängigem Nebenwirkungspotenzial (z. B. Glukokortikoiden) beachtet werden. Allerdings fehlt dafür bisher eine klinische Evidenz.
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Affiliation(s)
- Thanh Huong Luu Thi
- Universitätsklinik für Dermatologie und Venerologie, Martin-Luther-Universität Halle-Wittenberg, Ernst-Grube-Str. 40, 06097, Halle (Saale), Deutschland
| | - Adina Eichner
- Institut für angewandte Dermatopharmazie, Martin-Luther-Universität Halle-Wittenberg, Halle (Saale), Deutschland
| | - Johannes Wohlrab
- Universitätsklinik für Dermatologie und Venerologie, Martin-Luther-Universität Halle-Wittenberg, Ernst-Grube-Str. 40, 06097, Halle (Saale), Deutschland.
- Institut für angewandte Dermatopharmazie, Martin-Luther-Universität Halle-Wittenberg, Halle (Saale), Deutschland.
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Ando M, Nakao Y, Jin G, Sugiyama H, Sunaguchi N, Sung Y, Suzuki Y, Sun Y, Tanimoto M, Kawashima K, Yuasa T, Mori K, Ichihara S, Gupta R. Improving contrast and spatial resolution in crystal analyzer-based x-ray dark-field imaging: Theoretical considerations and experimental demonstration. Med Phys 2020; 47:5505-5513. [PMID: 32770681 DOI: 10.1002/mp.14442] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 06/16/2020] [Accepted: 07/07/2020] [Indexed: 11/11/2022] Open
Abstract
PURPOSE This paper describes and experimentally validates a methodology for improving contrast and spatial resolution of the x-ray dark-field imaging (XDFI) by cutting the monochromator-collimator asymmetrically and thinning the Laue angle analyzer. METHODS We measure the spatial resolution of our XDFI setup using a test object consisting of wolfram tungsten meshes and compare it with the theoretical prediction. Using x-ray dark-field computed tomography of breast cancer specimens (lobular carcinoma in situ), we demonstrate that the resolution of XDFI is sufficient for histopathologic analysis. RESULTS Our experimental results show that the overall spatial resolution of XDFI can be improved by approximately a factor of 2 when these modifications are implemented. The reconstructed images of breast cancer specimens provide sufficient details for radiologic histopathology. CONCLUSIONS By cutting the monochromator-collimator and thinning the Laue angle analyzer, XDFI can achieve the resolution sufficient for radiologic histopathology.
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Affiliation(s)
- Masami Ando
- Photon Factory, KEK, Oho 1-1, Tsukuba, Ibaraki, 305-0801, Japan.,Research Institute of Science and Engineering, Tokyo University of Science, Noda, Chiba, 278-8510, Japan
| | - Yuki Nakao
- Research Institute of Science and Engineering, Tokyo University of Science, Noda, Chiba, 278-8510, Japan
| | - Ge Jin
- Graduate School of Engineering, Kyushu Institute of Technology, Kitakyushu, 804-8550, Japan
| | | | - Naoki Sunaguchi
- Graduate School of Medicine, Nagoya University, 1-1-20 Daiko-Minami, Higashi-Ku, Nagoya, Aichi, 461-8673, Japan
| | - Yongjin Sung
- University of Wisconsin, Milwaukee, WI, 53211, USA
| | - Yoshifumi Suzuki
- Graduate School of Engineering, Kyushu Institute of Technology, Kitakyushu, 804-8550, Japan
| | - Yong Sun
- Graduate School of Engineering, Kyushu Institute of Technology, Kitakyushu, 804-8550, Japan
| | - Michio Tanimoto
- Shingijutsu Kyokai (Society of New Technology), Yushima, Bunkyo, Tokyo, 113-0034, Japan
| | | | - Tetsuya Yuasa
- Graduate School of Engineering and Science, Yamagata University, 4-3-16 Jyonan, Yonezawa, Yamagata, 992-8510, Japan
| | - Kensaku Mori
- Department of Media Science, Graduate School of Information Science, Nagoya University, Nagoya, Aichi, 464-8601, Japan
| | - Shu Ichihara
- Clinical Research Center, Department of Pathology, Nagoya Medical Center, Nagoya, Aichi, 460-0001, Japan
| | - Rajiv Gupta
- Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, 01778, USA
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Narter S, Hasdemir S, Tolunay S, Gokgoz S. A case of extensive ductal carcinoma in situ and sclerosing adenosis with metastasis on sentinel lymph node. TUMORI JOURNAL 2019; 105:NP63-NP66. [PMID: 31462162 DOI: 10.1177/0300891619870247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
INTRODUCTION Sclerosing adenosis is a form of adenosis characterized by lobulocentric architecture, glandular and stromal proliferation in which the stromal component compresses and distorts the glandular structures. Atypical epithelial proliferations such as atypical lobular hyperplasia, lobular carcinoma in situ, and ductal carcinoma in situ may accompany areas of sclerosing adenosis. We present a case of ductal carcinoma in situ and sclerosing adenosis with metastatic carcinoma on sentinel lymph node. CASE DESCRIPTION A 40-year-old woman presented with a palpable mass in her left breast. Radiologic studies showed a lesion suggesting malignancy in the left breast and atypical lymph node in the left axillary region. Left lumpectomy and sentinel lymph node biopsy was performed. Histopathologic examination revealed lobulocentric lesions with glandular proliferation and hyalinizing stroma in between. Foci of high-grade cribriform and solid type ductal carcinoma in situ were observed. Sentinel lymph node biopsy showed micrometastasis in one lymph node section. Based on these findings, the patient was diagnosed with high-grade ductal carcinoma in situ with sclerosing adenosis. However, the presence of micrometastasis in the lymph node suggested occult invasion that we were not able to detect. CONCLUSION Ductal carcinoma in situ with sclerosing adenosis can mimic invasive carcinoma both radiologically and histologically. It should be kept in mind that there may be occult invasive carcinoma in patients with ductal carcinoma in situ whether the lesion is accompanied by sclerosing adenosis or not. Multiple sections and immunohistochemical studies can be of help.
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Affiliation(s)
- Selin Narter
- Department of Surgical Pathology, Faculty of Medicine, Uludag University, Bursa, Turkey
| | - Secil Hasdemir
- Department of Surgical Pathology, Faculty of Medicine, Uludag University, Bursa, Turkey
| | - Sahsine Tolunay
- Department of Surgical Pathology, Faculty of Medicine, Uludag University, Bursa, Turkey
| | - Sehsuvar Gokgoz
- Department of General Surgery, Faculty of Medicine, Uludag University, Bursa, Turkey
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Pu H, Liu N, Yu J, Yang Y, Sun Y, Peng Y, Xie S, Luo J, Dong L, Chen H, Sun Y. Micropipette Aspiration of Single Cells for Both Mechanical and Electrical Characterization. IEEE Trans Biomed Eng 2019; 66:3185-3191. [PMID: 30835206 DOI: 10.1109/tbme.2019.2901763] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Cellular physical properties have been identified to reflect cell states. Existing techniques are able to characterize either mechanical or electrical properties of a cell. This paper presents a micropipette aspiration technique that enables the characterization of both mechanical (instantaneous elastic modulus, equilibrium elastic modulus, and viscosity), and electrical (specific membrane capacitance) properties of the same single cell. Two bladder cancer cell lines (RT4 and T24) with different metastatic potential were used to evaluate the technique. The results showed that high-grade bladder cancer cells (T24, grade III) possess lower viscosity, lower elastic modulus, and larger SMC than the low-grade cancer cells (RT4, grade I). The Naive Bayes classifier was utilized to assess the classification accuracy using single-physical and multi-physical parameters. The classification results confirmed that the use of multi-biophysical parameters resulted in higher accuracy (97.5%), sensitivity (100%), and specificity (95.2%) than the use of a single-physical parameter for distinguishing T24 and RT4 cells.
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Breast carcinoma in sclerosing adenosis: a clinicopathological and immunophenotypical analysis on 206 lesions. J Clin Pathol 2018; 71:546-553. [DOI: 10.1136/jclinpath-2017-204751] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Revised: 11/26/2017] [Accepted: 12/04/2017] [Indexed: 11/03/2022]
Abstract
AimsTo fully elucidate the clinicopathological features of breast carcinoma in sclerosing adenosis (SA-BC).MethodsClinical and histological characteristics of 206 SA-BCs from 180 patients were retrospectively evaluated. Immunohistochemical phenotype was examined. The clinicopathological relevance of the topographical pattern of SA-BCs was analysed.ResultsOverall, up to 46 patients (25.6%) had contralateral cancer, either SA associated or not. Of 99 cases who underwent core needle biopsy (CNB), 36 were underestimated as adenosis or atypical ductal hyperplasia at CNB, 5 invasive cases were misinterpreted as in situ carcinomas, whereas 4 ductal carcinoma in situ (DCIS) cases were overdiagnosed as invasive carcinoma. Microscopically, 163 tumours were in situ, including 136 DCIS, 19 lobular carcinomas in situ (LCIS) and 8 mixed DCIS/LCIS; of these carcinomas in situ (CIS), 37 had microinvasion. The DCIS group exhibited low, intermediate and high grades in 53.7%, 34.6% and 11.8% of cases, respectively, mostly with solid (43.4%) or cribriform (41.9%) pattern. Forty out of 43 invasive cases were invasive ductal carcinoma (IDC), mostly DCIS predominant. Immunophenotypically, luminal A phenotype was identified in 55.1%, 63.2% and 45.0% of DCIS, LCIS and IDC cases, respectively. Topographical type A group (carcinoma being entirely confined to SA, n=176) was characterised by smaller size, less invasiveness, lower grade and more frequency of luminal A immunophenotype compared with type B group (≥ 50% but not all of the carcinomatous lesion being located in SA, n=30) (all P<0.05).ConclusionsCIS, especially non-high-grade DCIS, represents the most common variant of SA-BC, and luminal A is the most predominant immunophenotype. CNB assessment might be challenging in some SA-BCs. The topographical pattern has great clinicopathological relevance. Careful evaluation of the contralateral breast and long-term follow-up for patients with SA-BC is necessary given its high prevalence of bilaterality.
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Sclerosing adenosis: Ultrasonographic and mammographic findings and correlation with histopathology. Mol Clin Oncol 2016; 6:157-162. [PMID: 28357084 PMCID: PMC5351743 DOI: 10.3892/mco.2016.1108] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Accepted: 11/04/2016] [Indexed: 11/05/2022] Open
Abstract
The present study was conducted to evaluate the radiological findings, particularly the ultrasonographic (US) characteristics of sclerosing adenosis (SA), and their correlation with histopathological results. A retrospective review identified 191 patients with a total of 200 lesions histopathologically confirmed as SA following breast surgery between July 2009 and December 2012. Of the 191 patients, 145 (151 lesions) with SA as the major component were included for US and mammographic (MG) analysis. All 145 patients analyzed were female, with a mean age ± standard deviation of 46.8±7.8 years (range, 25-71 years). All 145 patients underwent US examination and the imaging findings included heterogeneously echogenic areas in 9.3% (14/151), masses in 51.7% (78/151), masses with calcifications in 13.9% (21/151), focal acoustic shadowing in 4.0% (6/151) and were negative in 21.2% (32/151) patients. Among the 119 lesions with visible abnormalities, 87.4% (104/119) were hypoechoic, 58.0% (69/119) were irregular in shape, 52.1% (62/119) had an ill-defined margin, calcifications were found in 17.6% (21/119) and 7.6% (9/119) were hypervascular, while none of the characteristics mentioned above were significantly correlated with histopathology. A total of 136 patients underwent MG at the Fudan University Shanghai Cancer Center, and the imaging findings included microcalcifications in 31.6% (43/136), masses in 23.5% (32/136), asymmetric focal density in 14.7% (20/136), focal architectural distortion in 22.8% (31/136), and were negative in 7.4% (10/136). The mass lesions were fewer on MG compared with US (23.5 vs. 65.6%, respectively). The area under the curve of US distinguishing between benign and malignant lesions was significantly larger compared with that of MG (0.547 vs. 0.497, respectively; P=0.036). In the 60 lesions that were overestimated by Breast Imaging Reporting and Data System US category, one or more characteristics of malignancy were found on US imaging. The most common finding of SA was masses with or without calcifications on US and microcalcifications on MG. The accuracy of US was limited, but higher compared with that of MG; however, SA mimicking the characteristics of malignancy may contribute to misdiagnosis with US.
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Huang N, Chen J, Xue J, Yu B, Chen Y, Yang W, Shao Z, Wu J. Breast Sclerosing Adenosis and Accompanying Malignancies: A Clinicopathological and Imaging Study in a Chinese Population. Medicine (Baltimore) 2015; 94:e2298. [PMID: 26656378 PMCID: PMC5008523 DOI: 10.1097/md.0000000000002298] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Sclerosing adenosis (SA) is a less common histopathological lesion of the breast that can coexist with proliferative lesions as well as malignancies. We aimed to analyze the clinicopathological characteristics of SA and to investigate the radiological features of SA.Patients who underwent breast surgery at our institute from 2007 to 2013 were retrospectively reviewed. A total of 815 breasts (722 patients) were included in the final analysis. Synchronous bilateral SA was defined as the detection of another SA arising in the contralateral breast within 1 month after surgery for the initial breast lesion. Baseline characteristics, imaging records (ultrasonography, mammography, and magnetic resonance imaging [MRI]), and pathology were included in the analysis.The median age at diagnosis was 47 years old. The majority of patients had unilateral non-Bc-SA (457/722). Among 102 patients with bilateral SA, 78.4% were diagnosed synchronously. In total, 26 patients suffered from synchronous bilateral breast cancer. Upon final pathological investigation, 226 cases were SA involving breast cancer (Bc-SA), most (56.2%) of which were ductal carcinoma in situ (DCIS). In addition, lobular carcinoma in situ (LCIS) and diseases that involved LCIS also comprised up to 11.1% of cases. The majority of SA cases (405; 49.7%) had no obvious symptoms except for imaging changes in mammography or ultrasound. Compared with non-Bc-SA cases, Bc-SA cases were more likely to exhibit features of mass (32.8% vs. 28.6%) and architectural distortion (20.4% vs. 13.0%) on mammography. Ultrasonography, mammography, and MRI revealed unsatisfactory sensitivity and specificity to differentiate Bc-SA from non-Bc-SA. MRI exhibited the highest sensitivity and lowest specificity, whereas the specificity of mammography was as low as 50.0%.A tendency for synchronous bilaterality in both Bc-SA and non-Bc-SA was noted. DCIS was the most commonly observed malignancy involved in Bc-SA. Although most patients with SA were asymptomatic, the ability of imaging studies to accurately differentiate non-Bc-SA from Bc-SA remained unsatisfactory.
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Affiliation(s)
- Naisi Huang
- From the Department of Breast Surgery, Fudan University Shanghai Cancer Center, Shanghai, China (NH, JC, JX, ZS, JW); Department of Pathology, Fudan University Shanghai Cancer Center, Shanghai, China (BY, WY); Department of Diagnostic Radiology, Fudan University Shanghai Cancer Center, Shanghai, China (YC); Department of Oncology, Fudan University Shanghai Medical College, Shanghai, China (NH, JC, JX, BY, YC, WY, ZS, JW); and Collaborative Innovation Center for Cancer Medicine, Guangdong, China (JW)
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Sclerosing adenosis as a predictor of breast cancer bilaterality and multicentricity. Virchows Arch 2015; 467:71-8. [PMID: 25838080 DOI: 10.1007/s00428-015-1769-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2014] [Revised: 12/17/2014] [Accepted: 03/23/2015] [Indexed: 10/23/2022]
Abstract
Breast cancer is occasionally complicated by sclerosing adenosis (SA). Although both lesions usually originate in the terminal duct lobular unit, their pathogenetic relationship has not yet been elucidated. The present study analyzed 63 breast cancer patients with SA (involving a total of 75 breasts) to clarify if coexisting SA increased the frequency of multicentric breast cancer or not. Using the topographical classification proposed in our previous study, breast cancers with SA were classified into the following three types: type A (n = 22), cancer area was completely surrounded by the SA; type B (n = 26), cancer area partially overlapped the SA; and type C (n = 27), cancer area was located separate from the SA. Breast cancers with SA had a significant (P < 0.001) increase in frequency of harboring bilateral and multicentric cancers [17 of 63 (27%) and 15 of 63 (24%), respectively] when compared to breast cancer patients without SA, regardless of topographical type. Breast cancers with SA were less invasive (P < 0.001), of lower histological grade (P = 0.034), and had similar frequency of estrogen receptor-positive (P = 0.21) and HER2-positive (P = 0.74) tumors. In conclusion, contralateral and ipsilateral multicentric breast cancers occurred at a higher frequency in those with SA. Our data suggest that SA is, in addition to lobular neoplasia, a predictor of multicentric breast cancers.
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Gascoyne PRC, Shim S. Isolation of circulating tumor cells by dielectrophoresis. Cancers (Basel) 2014; 6:545-79. [PMID: 24662940 PMCID: PMC3980488 DOI: 10.3390/cancers6010545] [Citation(s) in RCA: 173] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2013] [Revised: 02/12/2014] [Accepted: 02/20/2014] [Indexed: 12/31/2022] Open
Abstract
Dielectrophoresis (DEP) is an electrokinetic method that allows intrinsic dielectric properties of suspended cells to be exploited for discrimination and separation. It has emerged as a promising method for isolating circulation tumor cells (CTCs) from blood. DEP-isolation of CTCs is independent of cell surface markers. Furthermore, isolated CTCs are viable and can be maintained in culture, suggesting that DEP methods should be more generally applicable than antibody-based approaches. The aim of this article is to review and synthesize for both oncologists and biomedical engineers interested in CTC isolation the pertinent characteristics of DEP and CTCs. The aim is to promote an understanding of the factors involved in realizing DEP-based instruments having both sufficient discrimination and throughput to allow routine analysis of CTCs in clinical practice. The article brings together: (a) the principles of DEP; (b) the biological basis for the dielectric differences between CTCs and blood cells; (c) why such differences are expected to be present for all types of tumors; and (d) instrumentation requirements to process 10 mL blood specimens in less than 1 h to enable routine clinical analysis. The force equilibrium method of dielectrophoretic field-flow fractionation (DEP-FFF) is shown to offer higher discrimination and throughput than earlier DEP trapping methods and to be applicable to clinical studies.
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Affiliation(s)
- Peter R C Gascoyne
- Department of Imaging Physics Research, The University of Texas M.D. Anderson Cancer Center Unit 951, 1515 Holcombe Boulevard, Houston, TX 77030, USA.
| | - Sangjo Shim
- Department of Imaging Physics Research, The University of Texas M.D. Anderson Cancer Center Unit 951, 1515 Holcombe Boulevard, Houston, TX 77030, USA.
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A clinico-pathological study on cancer in sclerosing adenosis. Breast Cancer 2013; 21:732-7. [DOI: 10.1007/s12282-013-0450-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2012] [Accepted: 01/23/2013] [Indexed: 10/27/2022]
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Ductal Carcinoma In Situ That Involves Sclerosing Adenosis: High Frequency of Bilateral Breast Cancer Occurrence. Clin Breast Cancer 2012; 12:398-403. [DOI: 10.1016/j.clbc.2012.08.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2012] [Accepted: 08/30/2012] [Indexed: 11/15/2022]
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