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Engelhard HH, Willis AJ, Hussain SI, Papavasiliou G, Banner DJ, Kwasnicki A, Lakka SS, Hwang S, Shokuhfar T, Morris SC, Liu B. Etoposide-Bound Magnetic Nanoparticles Designed for Remote Targeting of Cancer Cells Disseminated Within Cerebrospinal Fluid Pathways. Front Neurol 2020; 11:596632. [PMID: 33329349 PMCID: PMC7729165 DOI: 10.3389/fneur.2020.596632] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Accepted: 11/03/2020] [Indexed: 12/26/2022] Open
Abstract
Magnetic nanoparticles (MNPs) have potential for enhancing drug delivery in selected cancer patients, including those which have cells that have disseminated within cerebrospinal fluid (CSF) pathways. Here, we present data related to the creation and in vitro use of new two-part MNPs consisting of magnetic gold-iron alloy cores which have streptavidin binding sites, and are coated with biotinylated etoposide. Etoposide was chosen due to its previous use in the CSF and ease of biotinylation. Etoposide magnetic nanoparticles (“Etop-MNPs”) were characterized by several different methods, and moved at a distance by surface-walking of MNP clusters, which occurs in response to a rotating permanent magnet. Human cell lines including D283 (medulloblastoma), U138 (glioblastoma), and H2122 (lung adenocarcinoma) were treated with direct application of Etop-MNPs (and control particles), and after remote particle movement. Cell viability was determined by MTT assay and trypan blue exclusion. Results indicated that the biotinylated etoposide was successfully bound to the base MNPs, with the hybrid particle attaining a maximum velocity of 0.13 ± 0.018 cm/sec. Etop-MNPs killed cancer cells in a dose-dependent fashion, with 50 ± 6.8% cell killing of D283 cells (for example) with 24 h of treatment after remote targeting. U138 and H2122 cells were found to be even more susceptible to the killing effect of Etop-MNPs than D283 cells. These findings indicate that the novel Etop-MNPs have a cytotoxic effect, and can be moved relatively rapidly at physiologic distances, using a rotating magnet. While further testing is needed, intrathecal administration of Etop-MNPs holds promise for magnetically-enhanced eradication of cancer cells distributed within CSF pathways, particularly if given early in the course of the disease.
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Affiliation(s)
- Herbert H Engelhard
- Department of Neurosurgery, University of Illinois at Chicago, Chicago, IL, United States.,Department of Bioengineering University of Illinois at Chicago, Chicago, IL, United States
| | - Alexander J Willis
- Department of Neurosurgery, University of Illinois at Chicago, Chicago, IL, United States.,Department of Medicine, University of Illinois at Chicago, Chicago, IL, United States
| | - Syed I Hussain
- Department of Neurosurgery, University of Illinois at Chicago, Chicago, IL, United States.,Department of Biomedical Engineering, Illinois Institute of Technology, Chicago, IL, United States
| | - Georgia Papavasiliou
- Department of Biomedical Engineering, Illinois Institute of Technology, Chicago, IL, United States
| | - David J Banner
- Department of Bioengineering University of Illinois at Chicago, Chicago, IL, United States
| | - Amanda Kwasnicki
- Department of Neurosurgery, University of Illinois at Chicago, Chicago, IL, United States
| | - Sajani S Lakka
- Department of Medicine, University of Illinois at Chicago, Chicago, IL, United States
| | | | - Tolou Shokuhfar
- Department of Bioengineering University of Illinois at Chicago, Chicago, IL, United States
| | - Sean C Morris
- Pulse Therapeutics, Inc., St. Louis, MO, United States
| | - Bing Liu
- IMRA America, Inc., Ann Arbor, MI, United States
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2
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Conrad C, Dorzweiler K, Miller MA, Lauffenburger DA, Strik H, Bartsch JW. Profiling of metalloprotease activities in cerebrospinal fluids of patients with neoplastic meningitis. Fluids Barriers CNS 2017; 14:22. [PMID: 28806983 PMCID: PMC5556623 DOI: 10.1186/s12987-017-0070-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Accepted: 08/03/2017] [Indexed: 12/15/2022] Open
Abstract
Background Neoplastic invasion into leptomeninges and subarachnoid space, resulting in neoplastic meningitis (NM) is a fatal complication of advanced solid and hematological neoplasms. Identification of malignant involvement of the cerebrospinal fluid (CSF) early in the disease course has crucial prognostic and therapeutic implications, but remains challenging. As indicators of extracellular matrix (ECM) degradation and breakdown of the blood–brain-barrier, Matrix Metalloproteases (MMPs) and A Disintegrin and Metalloproteases (ADAMs) are potential analytes for cerebral pathophysiology and metastatic dissemination of tumor cells into the CSF. Methods We compared protease activities in CSF samples from patients with NM and control individuals using FRET-based metalloprotease substrates with distinct enzyme selectivity profiles in a real-time, multiplex approach termed “proteolytic activity matrix assay” (PrAMA). Protease activity dynamics can be tracked by fluorescence changes over time. By simultaneously monitoring a panel of 5 FRET-substrate cleavages, a proteolytic signature can be identified and analyzed to infer the activities of multiple specific proteases. Distinct patterns of substrate cleavage comparing disease vs. control samples allow rapid, reproducible and sensitive discrimination even in small volumes of CSF. Results Individual substrate cleavage rates were linked to distinct proteases, and PrAMA computational inference implied increased activities of MMP-9, ADAM8 and ADAM17 (4–5-fold on average) in CSF samples from NM patients that were inhibitable by the metalloprotease inhibitor batimastat (BB-94). The activities of these proteases correlated with blood–brain barrier impairment. Notably, CSF cell counts were not found to directly reflect the protease activities observed in CSF samples from NM patients; this may explain the frequent clinical observation of negative cytology in NM patients. Conclusion PrAMA analysis of CSF samples is a potential diagnostic method for sensitive detection of NM and may be suitable for the clinical routine. Electronic supplementary material The online version of this article (doi:10.1186/s12987-017-0070-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Catharina Conrad
- Department of Neurology, Philipps University Marburg, Baldingerstr, 35033, Marburg, Germany.,Department of Anesthesiology and Intensive Care Medicine, University Hospital, Albert-Schweitzer Campus 1, 48149, Münster, Germany
| | - Kristina Dorzweiler
- Department of Neurosurgery, Philipps University Marburg, Baldingerstr, 35033, Marburg, Germany
| | - Miles A Miller
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA.,Center for Systems Biology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, 02114, USA
| | - Douglas A Lauffenburger
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Herwig Strik
- Department of Neurology, Philipps University Marburg, Baldingerstr, 35033, Marburg, Germany.
| | - Jörg W Bartsch
- Department of Neurosurgery, Philipps University Marburg, Baldingerstr, 35033, Marburg, Germany.
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Rigakos G, Liakou CI, Felipe N, Orkoulas-Razis D, Razis E. Clinical Presentation, Diagnosis, and Radiological Findings of Neoplastic Meningitis. Cancer Control 2017; 24:9-21. [DOI: 10.1177/107327481702400103] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023] Open
Affiliation(s)
| | | | - Naillid Felipe
- Hygeia Hospital, Athens, Greece, Boston University School of Medicine, Baltimore, Maryland
| | - Dennis Orkoulas-Razis
- Boston, Massachusetts, and University of Maryland School of Medicine, Baltimore, Maryland
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Diagnostic and prognostic significance of flow cytometry immunophenotyping in patients with leptomeningeal carcinomatosis. Clin Exp Metastasis 2015; 32:383-91. [PMID: 25795393 DOI: 10.1007/s10585-015-9716-3] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Accepted: 03/16/2015] [Indexed: 10/23/2022]
Abstract
Some patients with epithelial-cell cancers develop leptomeningeal carcinomatosis (LC), a severe complication difficult to diagnose and with an adverse prognosis. This study explores the contribution of flow cytometry immunophenotyping (FCI) to the diagnosis and prognosis of LC. Cerebrospinal fluid (CSF) samples from patients diagnosed with LC were studied using FCI. Expression of the epithelial-cell adhesion molecule (EpCAM) was the criterion used to identify the epithelial cells. To test the diagnostic precision, 144 patients (94 diagnosed with LC) were included. The prognostic value of FCI was evaluated in 72 patients diagnosed with LC and eligible for therapy. Compared with cytology, FCI showed greater sensitivity and negative predictive value (79.79 vs. 50%; 68.85 vs. 51.55%, respectively), but lower specificity and positive predictive value (84 vs. 100%; 90.36 vs. 100%, respectively). The multivariate analysis revealed that the percentage of CSF EpCAM+ cells predicted an increased risk of death (HR: 1.012, 95% CI 1.000-1.023; p=0.041). A cut-off value of 8% EpCAM+ cells in the CSF distinguished two groups of patients with statistically significant differences in overall survival (OS) (p=0.018). This cut-off value kept its statistical significance regardless of the absolute CSF cell-count. The FCI study of the CSF improved the sensitivity for diagnosing LC, but refinement of the technique is needed to improve specificity. Furthermore, quantification of CSF EpCAM+ cells was revealed to be an independent prognostic factor for OS in patients with LC eligible for therapy. An 8% cut-off value contributed to predicting clinical evolution before initiation of therapy.
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Jahn F, Jordan K, Behlendorf T, Globig C, Schmoll HJ, Müller-Tidow C, Jordan B. Safety and Efficacy of Liposomal Cytarabine in the Treatment of Neoplastic Meningitis. Oncology 2015; 89:137-42. [PMID: 25791073 DOI: 10.1159/000380913] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2015] [Accepted: 02/11/2015] [Indexed: 11/19/2022]
Abstract
OBJECTIVES Although rare, neoplastic meningitis (NM) has been increasingly observed in patients with cancer due to the prolonged course of the disease. Intrathecal chemotherapy with methotrexate or cytarabine with repeating injection schedules of 2-3 times per week is currently the mainstay of treatment. An efficacious and comfortable treatment alternative might be represented by liposomal cytarabine. METHODS In this retrospective study, we reviewed all patients with NM due to solid tumors or hematological malignancies treated with liposomal cytarabine at our institution between March 2004 and September 2011. The primary endpoint was treatment response, which was defined as improvement in neurological symptoms and/or conversion of the initial cerebrospinal fluid cytology and/or response in the radiological findings. The main secondary endpoint was safety. RESULTS Fifty-one adult patients were evaluable for safety and 44 patients for efficacy. In 36 patients (81.8%), a treatment response was achieved. The median overall survival after diagnosis of NM was 11 months (95% confidence interval 8.8-13.2). Adverse events grade 1-4 occurred in 31 patients (60.8%), whereas grade 3-4 occurred in 18 patients (35.3%). CONCLUSION The encouraging efficacy and safety data obtained in our analysis and the convenient administration schedule make intrathecal liposomal cytarabine a favorable treatment option for NM patients.
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Affiliation(s)
- Franziska Jahn
- Department of Hematology/Oncology, Martin-Luther University Halle-Wittenberg, Halle, Germany
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6
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Illán J, Simo M, Serrano C, Castañón S, Gonzalo R, Martínez-García M, Pardo J, Gómez L, Navarro M, Altozano JP, Alvarez R, Bruna J, Subirá D. Differences in cerebrospinal fluid inflammatory cell reaction of patients with leptomeningeal involvement by lymphoma and carcinoma. Transl Res 2014; 164:460-7. [PMID: 24746871 DOI: 10.1016/j.trsl.2014.03.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/31/2013] [Revised: 03/25/2014] [Accepted: 03/27/2014] [Indexed: 12/24/2022]
Abstract
Dissemination of neoplastic cells into the cerebrospinal fluid (CSF) and leptomeninges is a devastating complication in patients with epithelial cell neoplasia (leptomeningeal carcinomatosis [LC]) and lymphomas (lymphomatous meningitis [LyM]). Information about the surrounding inflammatory cell populations is scarce. In this study, flow cytometry immunophenotyping was used to describe the distribution of the main leukocyte populations in the CSF of 83 patients diagnosed with neoplastic meningitis (LC, n = 65; LyM, n = 18). These data were compared with those obtained in the CSF from 55 patients diagnosed with the same groups of neoplasia without meningeal involvement (solid tumors, n = 36; high-grade lymphoma, n = 19). Median (interquartile) rates of lymphocytes, monocytes, and polymorphonuclear (PMN) cells were 59.7% (range, 35-76.6%), 24% (range, 16-53%), and 1.5% (range, 0-7.6%) in LC, respectively, and 98.5% (range, 70.8-100%), 1.5% (range, 0-29.3%), and 0% in LyM, respectively (P < 0.001). No difference was observed between patients with breast adenocarcinoma (n = 30) and lung adenocarcinoma (n = 21), nor with different rates of malignant CSF involvement. Patients with lymphoma (with or without LyM) had a similar CSF leukocyte distribution, but cancer patients with LC and without LC had a distinctive PMN cell rate (P = 0.002). These data show that CSF samples from patients with LC have a greater number of inflammatory cells and a different leukocyte distribution than seen in the CSF from patients with LyM. Description of PMN cells is a distinctive parameter of patients with LC, compared with the CSF from patients with LyM and patients with cancer but without LC.
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Affiliation(s)
- Julia Illán
- Unilabs Diagnósticos, SLU, c/Juan Esplandiú 15, Madrid 28007, Spain
| | - Marta Simo
- Unit of Neuro-Oncology, Departments of Oncology and Neurology, Hospital Universitario de Bellvitge-ICO Duran i Reynals, Avda. Gran Vía s/n km 2.7, Hospitalet de Llobregat 08907, Spain
| | - Cristina Serrano
- Department of Hematology, Fundación Jiménez Díaz, Plaza Cristo Rey 1, Madrid 28040, Spain
| | - Susana Castañón
- Department of Hematology, Fundación Jiménez Díaz, Plaza Cristo Rey 1, Madrid 28040, Spain
| | - Raquel Gonzalo
- Department of Hematology, Fundación Jiménez Díaz, Plaza Cristo Rey 1, Madrid 28040, Spain
| | - María Martínez-García
- Department of Oncology, Hospital del Mar, Paseo Marítimo 25-29, Barcelona 08003, Spain
| | - Javier Pardo
- Department of Neurology, Hospital Rey Juan Carlos, c/Gladiolo s/n, Móstoles 28933, Spain
| | - Lidia Gómez
- Department of Neurology, Hospital Quirón Madrid, c/Diego de Velázquez 1, Pozuelo de Alarcón 28223, Madrid, Spain
| | - Miguel Navarro
- Department of Oncology, Hospital Universitario de Salamanca, Paseo de San Vicente, 58-182, Salamanca 37007, Spain
| | - Javier Pérez Altozano
- Department of Oncology, Hospital General de Elche, Cami de L'Almassera, Elche 03203, Spain
| | - Ruth Alvarez
- Department of Oncology, Hospital Virgen de la Salud, Avda. de Barber, 30, Toledo 45004, Spain
| | - Jordi Bruna
- Unit of Neuro-Oncology, Departments of Oncology and Neurology, Hospital Universitario de Bellvitge-ICO Duran i Reynals, Avda. Gran Vía s/n km 2.7, Hospitalet de Llobregat 08907, Spain
| | - Dolores Subirá
- Department of Hematology, Hospital de Guadalajara, c/Donantes de sangre s/n, Guadalajara 19002, Spain.
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Neoplastic meningitis: How MRI and CSF cytology are influenced by CSF cell count and tumor type. ScientificWorldJournal 2013; 2013:248072. [PMID: 24453817 PMCID: PMC3881671 DOI: 10.1155/2013/248072] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2013] [Accepted: 09/30/2013] [Indexed: 11/17/2022] Open
Abstract
Background. Although CSF cytology and MRI are standard methods to diagnose neoplastic meningitis (NM), this complication of neoplastic disease remains difficult to detect. We therefore reevaluated the sensitivity of gadolinium (GD)-enhanced MRI and cerebrospinal-fluid (CSF)-cytology and the relevance of tumor type and CSF cell count. Methods. We retrospectively identified 111 cases of NM diagnosed in our CSF laboratory since 1990 with complete documentation of both MRI and CSF cytology. 37 had haematological and 74 solid neoplasms. CSF cell counts were increased in 74 and normal in 37 patients. Results. In hematological neoplasms, MRI was positive in 49% and CSF cytology in 97%. In solid tumors, the sensitivity of MRI was 80% and of cytology 78%. With normal CSF cell counts, MRI was positive in 59% (50% hematological, 72% solid malignancies) and CSF cytology in 76% (92% in hematological, 68% in solid neoplasms). In cases of elevated cell counts, the sensitivity of MRI was 72% (50% for hematological, 83% for solid malignancies) and of CSF cytology 91% (100% for haematological and 85% for solid neoplasms). 91% of cytologically positive cases were diagnosed at first and another 7% at second lumbar puncture. Routine protein analyses had a low sensitivity in detecting NM. Conclusions. The high overall sensitivity of MRI was only confirmed for NM from solid tumors and for elevated CSF cell counts. With normal cell counts and haematological neoplasms, CSF-cytology was superior to MRI. None of the analysed routine CSF proteins had an acceptable sensitivity and specificity in detecting leptomeningeal disease.
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Kurishima K, Miyazaki K, Tamura T, Ohara G, Kagohashi K, Kawaguchi M, Satoh H. Peritoneal and meningeal relapse from lung adenocarcinoma after a response to gefitinib: A case report. Mol Clin Oncol 2013; 1:785-787. [PMID: 24649247 PMCID: PMC3915655 DOI: 10.3892/mco.2013.122] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2013] [Accepted: 05/10/2013] [Indexed: 11/21/2022] Open
Abstract
The prognosis of carcinomatous peritonitis and meningitis is poor since ascites and focal neurological dysfunctions usually do not improve despite the available treatment options for this devastating disease. This is a case report of peritoneal and meningeal relapse from lung adenocarcinoma following a response to gefitinib. A 72-year-old woman was diagnosed with adenocarcinoma in the upper lobe of the left lung, accompanied by a massive carcinomatous pleural effusion. Following a cisplati-based chemotherapy, gefitinib was initiated, achieving satisfactory disease control. At 8 months after gefitinib initiation, the patient developed abdominal distension, gait disturbance and visual disorder of the right eye. Adenocarcinoma cells were detected in the ascitic and pleural fluids. The findings of this case report suggest that clinicians should remain vigilant for this type of metastasis, although it is rarely encountered.
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Affiliation(s)
- Koichi Kurishima
- Division of Respiratory Medicine, Mito Medical Center, University of Tsukuba, Mito, Ibaraki 310-0015, Japan
| | - Kunihiko Miyazaki
- Division of Respiratory Medicine, Mito Medical Center, University of Tsukuba, Mito, Ibaraki 310-0015, Japan
| | - Tomohiro Tamura
- Division of Respiratory Medicine, Mito Medical Center, University of Tsukuba, Mito, Ibaraki 310-0015, Japan
| | - Gen Ohara
- Division of Respiratory Medicine, Mito Medical Center, University of Tsukuba, Mito, Ibaraki 310-0015, Japan
| | - Katsunori Kagohashi
- Division of Respiratory Medicine, Mito Medical Center, University of Tsukuba, Mito, Ibaraki 310-0015, Japan
| | - Mio Kawaguchi
- Division of Respiratory Medicine, Mito Medical Center, University of Tsukuba, Mito, Ibaraki 310-0015, Japan
| | - Hiroaki Satoh
- Division of Respiratory Medicine, Mito Medical Center, University of Tsukuba, Mito, Ibaraki 310-0015, Japan
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Gaviani P, Corsini E, Salmaggi A, Lamperti E, Botturi A, Erbetta A, Milanesi I, Legnani F, Pollo B, Silvani A. Liposomal cytarabine in neoplastic meningitis from primary brain tumors: a single institutional experience. Neurol Sci 2013; 34:2151-7. [DOI: 10.1007/s10072-013-1358-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2012] [Accepted: 03/08/2013] [Indexed: 11/29/2022]
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Subirá D, Serrano C, Castañón S, Gonzalo R, Illán J, Pardo J, Martínez-García M, Millastre E, Aparisi F, Navarro M, Dómine M, Gil-Bazo I, Pérez Segura P, Gil M, Bruna J. Role of flow cytometry immunophenotyping in the diagnosis of leptomeningeal carcinomatosis. Neuro Oncol 2011; 14:43-52. [PMID: 21993441 DOI: 10.1093/neuonc/nor172] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
PURPOSE To explore the contribution of flow cytometry immunophenotyping (FCI) in detecting leptomeningeal disease in patients with solid tumors. EXPERIMENTAL DESIGN Cerebrospinal fluid (CSF) samples from 78 patients who received a diagnosis of epithelial-cell solid tumors and had clinical data suggestive of leptomeningeal carcinomatosis (LC) were studied. A novel FCI protocol was used to identify cells expressing the epithelial cell antigen EpCAM and their DNA content. Accompanying inflammatory cells were also described. FCI results (positive or negative for malignancy) were compared with those from CSF cytology and with the diagnosis established by the clinicians: patients with LC (n = 49), without LC (n = 26), and undetermined (n = 3). RESULTS FCI described a wide range of EpCAM-positive cells with a hyperdiploid DNA content in the CSF of patients with LC. Compared with cytology, FCI showed higher sensitivity (75.5 vs 65.3) and negative predictive value (67.6 vs 60.5), and similar specificity (96.1 vs 100) and positive predictive value (97.4 vs 100). Concordance between cytology and FCI was high (Kp = 0.83), although misdiagnosis of LC did not show differences between evaluating the CSF with 1 or 2 techniques (P = .06). Receiver-operator characteristic curve analyses showed that lymphocytes and monocytes had a different distribution between patients with and without LC. CONCLUSION FCI seems to be a promising new tool for improving the diagnostic examination of patients with suspicion of LC. Detection of epithelial cells with a higher DNA content is highly specific of LC, but evaluation of the nonepithelial cell compartment of the CSF might also be useful for supporting this diagnosis.
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Affiliation(s)
- Dolores Subirá
- Department of Hematology, Hospital de Guadalajara, Guadalajara, Spain.
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Neoplastic meningitis resulting from hematological malignancies: pharmacokinetic considerations and maximizing outcome. ACTA ACUST UNITED AC 2011; 1:1391-1402. [PMID: 22396850 DOI: 10.4155/cli.11.115] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Neoplastic meningitis, also known as leptomeningeal metastases, is a complication of various types of cancer that occurs when tumor cells enter the cerebrospinal fluid (CSF), travel along CSF pathways and grow. Treatment options include drug delivery directly into the CNS or systemic administration for targeted action in the CNS. CNS drug delivery is limited by the blood-brain barrier and the blood-CSF barrier. It may be possible to partially overcome this by using high-dose systemic therapy; however, this is done at the possible expense of increased systemic toxicity. Intra-CSF drug delivery bypasses the blood-brain barrier and allows direct access of the chemotherapeutic agent to the CSF. Because neoplastic meningitis occurs in an increasingly large percentage of all cancer patients, it is imperative to optimize drug delivery to the CSF and meninges. Both the pharmacokinetic profile of the chemotherapeutic agent and the site of administration influence therapeutic efficacy. Achieving prolonged therapeutic cytotoxic drug concentrations and even distribution in the CSF will improve efficacy. In this article we summarize data on the efficacy, safety and outcome of high-dose systemic and intra-CSF treatments.
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