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Brooks J, Zuro D, Song JY, Madabushi SS, Sanchez JF, Guha C, Kortylewski M, Chen BT, Gupta K, Storme G, Froelich J, Hui SK. Longitudinal Preclinical Imaging Characterizes Extracellular Drug Accumulation After Radiation Therapy in the Healthy and Leukemic Bone Marrow Vascular Microenvironment. Int J Radiat Oncol Biol Phys 2022; 112:951-963. [PMID: 34767936 PMCID: PMC9038217 DOI: 10.1016/j.ijrobp.2021.10.146] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 08/24/2021] [Accepted: 10/22/2021] [Indexed: 11/29/2022]
Abstract
PURPOSE Recent initial findings suggest that radiation therapy improves blood perfusion and cellular chemotherapy uptake in mice with leukemia. However, the ability of radiation therapy to influence drug accumulation in the extracellular bone marrow tissue is unknown, due in part to a lack of methodology. This study developed longitudinal quantitative multiphoton microscopy (L-QMPM) to characterize the bone marrow vasculature (BMV) and drug accumulation in the extracellular bone marrow tissue before and after radiation therapy in mice bearing leukemia. METHODS AND MATERIALS We developed a longitudinal window implant for L-QMPM imaging of the calvarium BMV before, 2 days after, and 5 days after total body irradiation (TBI). Live time-lapsed images of a fluorescent drug surrogate were used to obtain measurements, including tissue wash-in slope (WIStissue) to measure extracellular drug accumulation. We performed L-QMPM imaging on healthy C57BL/6 (WT) mice, as well as mice bearing acute lymphoblastic leukemia (ALL) and acute myeloid leukemia (AML). RESULTS Implants had no effects on calvarium dose, and parameters for wild-type untreated mice were stable during imaging. We observed decreased vessel diameter, vessel blood flow, and WIStissue with the onset of AML and ALL. Two to 10 Gy TBI increased WIStissue and vessel diameter 2 days after radiation therapy in all 3 groups of mice and increased single-vessel blood flow in mice bearing ALL and AML. Increased WIStissue was observed 5 days after 10 Gy TBI or 4 Gy split-dose TBI (2 treatments of 2 Gy spaced 3 days apart). CONCLUSIONS L-QMPM provides stable functional assessments of the BMV. Nonmyeloablative and myeloablative TBI increases extracellular drug accumulation in the leukemic bone marrow 2 to 5 days posttreatment, likely through improved blood perfusion and drug exchange from the BMV to the extravascular tissue. Our data show that neo-adjuvant TBI at doses from 2 Gy to 10 Gy conditions the BMV to improve drug transport to the bone marrow.
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Affiliation(s)
- Jamison Brooks
- Department of Radiation Oncology, City of Hope, Duarte, California; Department of Radiation Oncology, University of Minnesota, Minneapolis, Minnesota
| | - Darren Zuro
- Department of Radiation Oncology, City of Hope, Duarte, California; Department of Radiation Oncology, University of Minnesota, Minneapolis, Minnesota
| | - Joo Y Song
- Department of Pathology, City of Hope, Duarte, California
| | | | - James F Sanchez
- Beckman Research Institute of City of Hope, Duarte, California
| | - Chandan Guha
- Department of Radiation Oncology, Albert Einstein College of Medicine, Montefiore Medical Center, Bronx, New York
| | - Marcin Kortylewski
- Department of Immuno-Oncology, Beckman Research Institute, City of Hope, Duarte, California
| | - Bihong T Chen
- Department of Diagnostic Radiology, City of Hope Medical Center, Duarte, California
| | - Kalpna Gupta
- Hematology/Oncology, Department of Medicine, University of California, Irvine and Southern California Institute for Research and Education, VA Medical Center, North Hills, California; Division of Hematology, Oncology and Transplantation, Department of Medicine, University of Minnesota, Minneapolis, Minnesota
| | - Guy Storme
- Department of Radiotherapy, UZ Brussel, Jette, Belgium
| | - Jerry Froelich
- Department of Radiology, University of Minnesota, Minneapolis, Minnesota
| | - Susanta K Hui
- Department of Radiation Oncology, City of Hope, Duarte, California; Beckman Research Institute of City of Hope, Duarte, California.
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Brooks J, Kumar B, Zuro DM, Raybuck JD, Madabushi SS, Vishwasrao P, Parra LE, Kortylewski M, Armstrong B, Froelich J, Hui SK. Biophysical Characterization of the Leukemic Bone Marrow Vasculature Reveals Benefits of Neoadjuvant Low-Dose Radiation Therapy. Int J Radiat Oncol Biol Phys 2021; 109:60-72. [PMID: 32841681 PMCID: PMC7736317 DOI: 10.1016/j.ijrobp.2020.08.037] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 08/04/2020] [Accepted: 08/13/2020] [Indexed: 12/13/2022]
Abstract
PURPOSE Although vascular alterations in solid tumor malignancies are known to decrease therapeutic delivery, the effects of leukemia-induced bone marrow vasculature (BMV) alterations on therapeutic delivery are not well known. Additionally, functional quantitative measurements of the leukemic BMV during chemotherapy and radiation therapy are limited, largely due to a lack of high-resolution imaging techniques available preclinically. This study develops a murine model using compartmental modeling for quantitative multiphoton microscopy (QMPM) to characterize the malignant BMV before and during treatment. METHODS AND MATERIALS Using QMPM, live time-lapsed images of dextran leakage from the local BMV to the surrounding bone marrow of mice bearing acute lymphoblastic leukemia (ALL) were taken and fit to a 2-compartment model to measure the transfer rate (Ktrans), fractional extracellular extravascular space (νec), and vascular permeability parameters, as well as functional single-vessel characteristics. In response to leukemia-induced BMV alterations, the effects of 2 to 4 Gy low-dose radiation therapy (LDRT) on the BMV, drug delivery, and mouse survival were assessed post-treatment to determine whether neoadjuvant LDRT before chemotherapy improves treatment outcome. RESULTS Mice bearing ALL had significantly altered Ktrans, increased νec, and increased permeability compared with healthy mice. Angiogenesis, decreased single-vessel perfusion, and decreased vessel diameter were observed. BMV alterations resulted in disease-dependent reductions in cellular uptake of Hoechst dye. LDRT to mice bearing ALL dilated BMV, increased single-vessel perfusion, and increased daunorubicin uptake by ALL cells. Consequently, LDRT administered to mice before receiving nilotinib significantly increased survival compared with mice receiving LDRT after nilotinib, demonstrating the importance of LDRT conditioning before therapeutic administration. CONCLUSION The developed QMPM enables single-platform assessments of the pharmacokinetics of fluorescent agents and characterization of the BMV. Initial results suggest BMV alterations after neoadjuvant LDRT may contribute to enhanced drug delivery and increased treatment efficacy for ALL. The developed QMPM enables observations of the BMV for use in ALL treatment optimization.
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Affiliation(s)
- Jamison Brooks
- Department of Radiation Oncology, City of Hope, Duarte, California; Department of Radiation Oncology, University of Minnesota, Minneapolis, Minnesota
| | - Bijender Kumar
- Department of Radiation Oncology, City of Hope, Duarte, California; Hematology Malignancies and Stem Cell Transplantation Institute, City of Hope National Medical Center, Duarte, California
| | - Darren M Zuro
- Department of Radiation Oncology, City of Hope, Duarte, California; Department of Radiation Oncology, University of Minnesota, Minneapolis, Minnesota
| | | | | | | | | | - Marcin Kortylewski
- Department of Immuno-Oncology, City of Hope, Duarte, California; Beckman Research Institute of City of Hope, Duarte, California
| | - Brian Armstrong
- Beckman Research Institute of City of Hope, Duarte, California; Department of Development and Stem Cell Biology, City of Hope, Duarte, California
| | - Jerry Froelich
- Department of Radiology, University of Minnesota, Minneapolis, Minnesota
| | - Susanta K Hui
- Department of Radiation Oncology, City of Hope, Duarte, California; Beckman Research Institute of City of Hope, Duarte, California.
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Al-Gubory KH. Shedding light on fibered confocal fluorescence microscopy: Applications in biomedical imaging and therapies. JOURNAL OF BIOPHOTONICS 2019; 12:e201900146. [PMID: 31343844 DOI: 10.1002/jbio.201900146] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Revised: 07/20/2019] [Accepted: 07/23/2019] [Indexed: 06/10/2023]
Abstract
Discoveries of major importance in life sciences and preclinical research are linked to the invention of microscopes that enable imaging of cells and their microstructures. Imaging technologies involving in vivo procedures using fluorescent dyes that permit labelling of cells have been developed over the last two decades. Fibered confocal fluorescence microscopy (FCFM) is an imaging technology equipped with fiber-optic probes to deliver light to organs and tissues of live animals. This enables not only in vivo detection of fluorescent signals and visualization of cells, but also the study of dynamic processes, such cell proliferation, apoptosis and angiogenesis, under physiological and pathological conditions. This will allow the diagnosis of diseased organs and tissues and the evaluation of the efficacy of new therapies in animal models of human diseases. The aim of this report is to shed light on FCFM and its potential medical applications and discusses some factors that compromise the reliability and reproducibility of monitoring biological processes by FCFM. This report also highlights the issues concerning animal experimentation and welfare, and the contributions of FCFM to the 3Rs principals, replacement, reduction and refinement.
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Affiliation(s)
- Kaïs H Al-Gubory
- National Institute for Agricultural Research, Department of Animal Physiology, Jouy-en-Josas, France
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Wang Z, Winkler N, Qian B, Groß W, Mehrabi A, Ryschich E. Endothelial capture using antibodies and nanoparticles in human tissues: Antigen identification and liver segment imaging. Acta Biomater 2019; 97:474-489. [PMID: 31398471 DOI: 10.1016/j.actbio.2019.08.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 07/22/2019] [Accepted: 08/02/2019] [Indexed: 12/31/2022]
Abstract
BACKGROUND The unique phenomenon of endothelial antibody capture (endocapt) leads to site-specific accumulation of antibodies on the endothelium after its locoregional injection. The potential of this phenomenon has already been demonstrated in animal models. In the present study, the translational potential of several human endothelium-specific antibodies for their use in the endocapt-based approach was analysed. METHODS The binding of different endothelium-surface specific monoclonal antibody clones was analysed in human tissue and in endothelial cells using image-based immunofluorescence and the determination of half-maximal effective concentration (EC50). The potential of endocapt-based locoregional application of antibodies or antibody-coated liposomes was analysed ex vivo using isolated mouse liver perfusion and in vivo using superselective injection in tumour models. RESULTS Eight out of ten antibody clones were assigned to the group of "fast binding antibodies". Different antibody clones showed various binding kinetics to the same endothelial marker whereas the binding kinetics of single antibody clones was independent from the tissue type. Anti-CD49e, anti-CD31, anti-CD34 and anti-CD102 antibodies showed the lowest EC50 of antibody binding concentration and constant results in EC50 determination of antibody binding to cells and human tissue. Experimental studies using anti-mouse CD49e antibody and coated immunoliposomes confirmed their effective capture by endothelial cells in vitro and in vivo by which fluorescent liver segment labelling was achieved. CONCLUSIONS Our findings identify the high potential of several human antibody clones, especially anti-CD49e, -CD31, -CD34 and -CD102, for endocapt technology. We also propose important translational implications of these antibodies for image-guided liver surgery and for use of nanoparticles/immunoliposomes. Toxicological studies are indispensable for further translational development of new antibodies for endocapt. STATEMENT OF SIGNIFICANCE The phenomenon of endothelial antibody capture (endocapt) leads to site-specific accumulation of antibodies on the endothelium after its locoregional injection. This phenomenon broadly prevents systemic circulation of the antibody or antibody-drug conjugates. In the present study, our findings identify several human antibody clones promising for endothelial capture technology. This study provided the experimental demonstration of liver segment labelling ex vivo using isolated mouse liver perfusion and in vivo using superselective injection in tumor models. In addition, this study proposed the important translational implications of selected antibodies for image-guided liver surgery and for use of nanoparticles/immunoliposomes.
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Winkler N, Strübing F, Groß W, Mier W, Ryschich E. Phenomenon of Endothelial Antibody Capture: Principles and Potential for Locoregional Targeting of Hepatic Tumors. Hepatology 2018; 68:1804-1816. [PMID: 29734469 DOI: 10.1002/hep.30072] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Revised: 04/17/2018] [Accepted: 04/30/2018] [Indexed: 01/26/2023]
Abstract
The systemic drug circulation represents a source of adverse effects during tumor targeting. We studied the binding efficacy of endothelium-specific antibodies after a very short contact with an antigen target, along with assessing the intravascular capture and targeting potential of these antibodies after locoregional injection. Fast-binding anti-CD 146 (clone ME-9F1) and anti-CD31 (clone 390) antibodies were selected based on histological analysis of their binding activity. The efficacy of antibody capture by hepatic endothelium under different conditions was analyzed using an isolated liver perfusion model. The local enrichment of R-phycoerythrin and 125 I-conjugated antibody was studied in vivo in two hepatic tumor models using biodistribution, scintigraphic imaging, and fluorescence microscopy. Upon injection into the tumor-feeding artery, the antibody was immediately captured in the microvasculature during the first passage. At doses not exceeding the saturation level of endothelial epitopes, the capture efficacy was almost 90%. We showed that the efficacy of endothelial capture is controlled by factors such as antibody affinity, number of binding sites on the endothelium, and microvascular flow rate. The targeting potential of endothelial capture was experimentally proven in vivo using scintigraphic imaging and biodistribution analysis after locoregional intra-arterial injection of 125 I-labeled antibodies in hepatic tumor models. Conclusion: The unique phenomenon of endothelial capture can broadly prevent systemic circulation of the antibody or antibody-drug conjugates applied by intravascular injection and may have specific relevance for targeting of hepatic tumors.
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Affiliation(s)
- Nora Winkler
- Department of General, Visceral and Transplantation Surgery, University Hospital Heidelberg, Heidelberg, Germany
| | - Felix Strübing
- Department of General, Visceral and Transplantation Surgery, University Hospital Heidelberg, Heidelberg, Germany
| | - Wolfgang Groß
- Department of General, Visceral and Transplantation Surgery, University Hospital Heidelberg, Heidelberg, Germany
| | - Walter Mier
- Department of Nuclear Medicine, University Hospital Heidelberg, Heidelberg, Germany
| | - Eduard Ryschich
- Department of General, Visceral and Transplantation Surgery, University Hospital Heidelberg, Heidelberg, Germany
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Yu J, Dai X, Zou HH, Song JC, Li Y, Shi HB, Xu Q, Shen H. Diffusion kurtosis imaging in identifying the malignancy of lymph nodes during the primary staging of rectal cancer. Colorectal Dis 2018; 20:116-125. [PMID: 28772347 DOI: 10.1111/codi.13835] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Accepted: 07/13/2017] [Indexed: 12/15/2022]
Abstract
AIM The aim was to assess the diagnostic value of diffusion kurtosis imaging (DKI) for discriminating between benign and malignant lymph nodes in patients with rectal carcinoma. METHOD ighty-five patients with rectal adenocarcinoma who underwent total mesorectal excision of the rectum were studied. A total of 273 lymph nodes were harvested and subjected to histological analysis. Quantitative parameters [apparent diffusion parameter Dapp of the Gaussian distribution, apparent kurtosis coefficient Kapp and apparent diffusion coefficient (ADC)] of lymph nodes were derived from DKI. Differences and the diagnostic performance of these parameters were calculated by using the independent-samples t test and receiver operating characteristic curve analyses. RESULTS The median Dapp and ADC values of metastatic lymph nodes were significantly greater than those of benign lymph nodes, whereas the median Kapp of metastatic lymph nodes was statistically less than that of normal lymph nodes. Dapp had the relatively highest area under the curve of 0.774. When 1126.15 × 10-6 mm2 /s was used as a Dapp threshold value, the sensitivity and specificity were 96.97% and 41.82%, respectively. CONCLUSION DKI can help differentiate metastatic vs benign lymph nodes during the primary staging of rectal cancer.
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Affiliation(s)
- J Yu
- Department of Radiology, First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - X Dai
- Department of Radiology, First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - H-H Zou
- Department of Radiology, First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - J-C Song
- Department of Radiology, First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Y Li
- Department of Radiology, First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - H-B Shi
- Department of Radiology, First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Q Xu
- Department of Radiology, First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - H Shen
- Department of Epidemiology and Biostatistics, Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, Collaborative Innovation Center for Cancer Personalized Medicine, School of Public Health, Nanjing Medical University, Nanjing, China
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Bai J, Wang JTW, Mei KC, Al-Jamal WT, Al-Jamal KT. Real-time monitoring of magnetic drug targeting using fibered confocal fluorescence microscopy. J Control Release 2016; 244:240-246. [PMID: 27449744 PMCID: PMC5176088 DOI: 10.1016/j.jconrel.2016.07.026] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2016] [Revised: 07/09/2016] [Accepted: 07/17/2016] [Indexed: 12/01/2022]
Abstract
Magnetic drug targeting has been proposed as means of concentrating therapeutic agents at a target site and the success of this approach has been demonstrated in a number of studies. However, the behavior of magnetic carriers in blood vessels and tumor microcirculation still remains unclear. In this work, we utilized polymeric magnetic nanocapsules (m-NCs) for magnetic targeting in tumors and dynamically visualized them within blood vessels and tumor tissues before, during and after magnetic field exposure using fibered confocal fluorescence microscopy (FCFM). Our results suggested that the distribution of m-NCs within tumor vasculature changed dramatically, but in a reversible way, upon application and removal of a magnetic field. The m-NCs were concentrated and stayed as clusters near a blood vessel wall when tumors were exposed to a magnetic field but without rupturing the blood vessel. The obtained FCFM images provided in vivo in situ microvascular observations of m-NCs upon magnetic targeting with high spatial resolution but minimally invasive surgical procedures. This proof-of-concept descriptive study in mice is envisaged to track and quantify nanoparticles in vivo in a non-invasive manner at microscopic resolution.
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Affiliation(s)
- Jie Bai
- Institute of Pharmaceutical Science, Faculty of Life Sciences & Medicine, King's College London, SE1 9NH, UK
| | - Julie Tzu-Wen Wang
- Institute of Pharmaceutical Science, Faculty of Life Sciences & Medicine, King's College London, SE1 9NH, UK
| | - Kuo-Ching Mei
- Institute of Pharmaceutical Science, Faculty of Life Sciences & Medicine, King's College London, SE1 9NH, UK
| | - Wafa T Al-Jamal
- School of Pharmacy, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK
| | - Khuloud T Al-Jamal
- Institute of Pharmaceutical Science, Faculty of Life Sciences & Medicine, King's College London, SE1 9NH, UK.
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Prevention of Polyglycolic Acid-Induced Peritoneal Adhesions Using Alginate in a Rat Model. BIOMED RESEARCH INTERNATIONAL 2015; 2015:403413. [PMID: 26078949 PMCID: PMC4454711 DOI: 10.1155/2015/403413] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2014] [Accepted: 09/17/2014] [Indexed: 11/17/2022]
Abstract
Postoperative intra-abdominal or intrathoracic adhesions sometimes cause significant morbidity. We have designed three types of alginate-based treatments using strongly cross-linked (SL), weakly cross-linked (WL), and non-cross-linked (NL) alginate with calcium gluconate. In rat experiments, we compared the antiadhesive effects of the three types of alginate-based treatments, fibrin glue treatment (a standard treatment), and no treatment against adhesions caused by polyglycolic acid (PGA) mesh (PGA-induced adhesions). The antiadhesive materials were set on the PGA sheet fixed on the parietal peritoneum of the abdomen. Fifty-six days later, the adhesions were evaluated macroscopically by the adhesion scores and microscopically by hematoxylin-eosin staining and immunostaining. We also tested the fibroblast growth on the surface of the antiadhesive materials in vitro. The antiadhesive effects of WL and NL were superior to the no treatment and fibrin glue treatment. A microscopic evaluation confirmed that the PGA sheet was covered by a peritoneal layer constructed of well-differentiated mesothelial cells, and the inflammation was most improved in the NL and WL. The fibroblast growth was inhibited most on the surfaces of the NL and WL. These results suggest that either the WL or NL treatments are suitable for preventing PGA-induced adhesions compared to SL or the conventional treatment.
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Liu D, Chalkidou A, Landau DB, Marsden PK, Fenwick JD. Interstitial diffusion and the relationship between compartment modelling and multi-scale spatial-temporal modelling of (18)F-FLT tumour uptake dynamics. Phys Med Biol 2014; 59:5175-202. [PMID: 25138724 DOI: 10.1088/0031-9155/59/17/5175] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Tumour cell proliferation can be imaged via positron emission tomography of the radiotracer 3'-deoxy-3'-18F-fluorothymidine (18F-FLT). Conceptually, the number of proliferating cells might be expected to correlate more closely with the kinetics of 18F-FLT uptake than with uptake at a fixed time. Radiotracer uptake kinetics are standardly visualized using parametric maps of compartment model fits to time-activity-curves (TACs) of individual voxels. However the relationship between the underlying spatiotemporal accumulation of FLT and the kinetics described by compartment models has not yet been explored. In this work tumour tracer uptake is simulated using a mechanistic spatial-temporal model based on a convection-diffusion-reaction equation solved via the finite difference method. The model describes a chain of processes: the flow of FLT between the spatially heterogeneous tumour vasculature and interstitium; diffusion and convection of FLT within the interstitium; transport of FLT into cells; and intracellular phosphorylation. Using values of model parameters estimated from the biological literature, simulated FLT TACs are generated with shapes and magnitudes similar to those seen clinically. Results show that the kinetics of the spatial-temporal model can be recovered accurately by fitting a 3-tissue compartment model to FLT TACs simulated for those tumours or tumour sub-volumes that can be viewed as approximately closed, for which tracer diffusion throughout the interstitium makes only a small fractional change to the quantity of FLT they contain. For a single PET voxel of width 2.5-5 mm we show that this condition is roughly equivalent to requiring that the relative difference in tracer uptake between the voxel and its neighbours is much less than one.
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Affiliation(s)
- Dan Liu
- Department of Oncology, University of Oxford, Old Road Campus Research Building, Roosevelt Drive, Oxford OX3 7DQ, UK
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Vag T, Slotta-Huspenina J, Rosenberg R, Bader FG, Nitsche U, Drecoll E, Rummeny EJ, Gaa J. Computerized analysis of enhancement kinetics for preoperative lymph node staging in rectal cancer using dynamic contrast-enhanced magnetic resonance imaging. Clin Imaging 2014; 38:845-9. [PMID: 25082173 DOI: 10.1016/j.clinimag.2014.06.011] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2014] [Revised: 05/20/2014] [Accepted: 06/10/2014] [Indexed: 01/31/2023]
Abstract
For this feasibility study, dynamic contrast-enhanced magnetic resonance imaging (dceMRI) was performed preoperatively in 9 patients with histologically proven rectal carcinoma. A total of 41 lymph nodes detected were matched to histopathology. Their contrast enhancement patterns were evaluated using computer-aided analysis and categorized in persistent, plateau, and washout curve type. Highest diagnostic accuracy for detecting malignancy was observed, when less than 31.8% of the voxels within a lymph node demonstrated a washout curve (sensitivity/specificity of 81.8%/89.7%; area under the curve, AUC=0.87). In comparison, conventional size measurements revealed lower AUC of 0.81 (sensitivity/specificity of 75%/72.4%). We conclude that dceMRI might be of diagnostic value for preoperative lymph node staging.
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Affiliation(s)
- Tibor Vag
- Department of Radiology, Klinikum Rechts der Isar, Technical University Munich, Ismaninger Strasse 22, 81675 Munich, Germany.
| | - Julia Slotta-Huspenina
- Institute of Pathology, Klinikum Rechts der Isar, Technical University Munich, Trogerstrasse 18, 81675 Munich, Germany
| | - Robert Rosenberg
- Department of General Surgery, Klinikum Rechts der Isar, Technical University Munich, Ismaninger Strasse 22, 81675 Munich, Germany
| | - Franz G Bader
- Department of General Surgery, Klinikum Rechts der Isar, Technical University Munich, Ismaninger Strasse 22, 81675 Munich, Germany
| | - Ulrich Nitsche
- Department of General Surgery, Klinikum Rechts der Isar, Technical University Munich, Ismaninger Strasse 22, 81675 Munich, Germany
| | - Enken Drecoll
- Institute of Pathology, Klinikum Rechts der Isar, Technical University Munich, Trogerstrasse 18, 81675 Munich, Germany
| | - Ernst J Rummeny
- Department of Radiology, Klinikum Rechts der Isar, Technical University Munich, Ismaninger Strasse 22, 81675 Munich, Germany
| | - Jochen Gaa
- Department of Radiology, Klinikum Rechts der Isar, Technical University Munich, Ismaninger Strasse 22, 81675 Munich, Germany
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Dietrich A, Stewart J, Huether M, Helm M, Schuetze C, Schnittler HJ, Jaffray DA, Kunz-Schughart LA. Macromolecule extravasation-xenograft size matters: a systematic study using probe-based confocal laser endomicroscopy (pCLE). Mol Imaging Biol 2014; 15:693-702. [PMID: 23632953 PMCID: PMC3826054 DOI: 10.1007/s11307-013-0641-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
PURPOSE Profound changes of the vasculature in tumors critically impact drug delivery and therapy response. We aimed at developing a procedure to monitor morphological and functional parameters of the vasculature in subcutaneous xenograft models commonly applied for therapy testing by using probe-based confocal laser endomicroscopy. PROCEDURES By monitoring various normal and diseased tissues, we established an experimental and analytical set-up to systematically analyze tracer extravasation from the microvasculature. Application of the approach in two xenograft models (HCT-116 and SW620) was realized consecutively throughout tumor growth. RESULTS The incidence of dilated vessels increased with xenograft size in both models while macromolecule extravasation and tracer accumulation in the tumor tissue, respectively, was significantly reduced throughout growth. The development of dilated/ultradilated vessels correlated with tracer extravasation only in the HCT-116 but not the SW620 model. The underlying mechanisms are still ambiguous and discussed. CONCLUSIONS Our findings clearly indicate that both xenograft type and size matter for drug delivery and therapy testing.
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Affiliation(s)
- Antje Dietrich
- />Tumor Pathophysiology, OncoRay—National Center for Radiation Research in Oncology, Medical Faculty Carl Gustav Carus, Fetscherstraße 74, P.O. Box 41 , 01307 TU Dresden, Germany
| | - James Stewart
- />Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, ON Canada
| | - Melanie Huether
- />Tumor Pathophysiology, OncoRay—National Center for Radiation Research in Oncology, Medical Faculty Carl Gustav Carus, Fetscherstraße 74, P.O. Box 41 , 01307 TU Dresden, Germany
| | - Mario Helm
- />Medical Radiation Physics, OncoRay—National Center for Radiation Research in Oncology, Medical Faculty Carl Gustav Carus, TU Dresden, Germany
| | - Christina Schuetze
- />Experimental Radiotherapy and Radiobiology of Tumors, OncoRay—National Center for Radiation Research in Oncology, Medical Faculty Carl Gustav Carus, TU Dresden, Germany
| | - Hans-Joachim Schnittler
- />Department of Anatomy and Cell Biology, Institute of Anatomy, University of Muenster, Muenster, Germany
| | - David A. Jaffray
- />Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, ON Canada
- />Radiation Medicine Program, Princess Margaret Hospital/Ontario Cancer Institute, University Health Network, Toronto, ON Canada
| | - Leoni A. Kunz-Schughart
- />Tumor Pathophysiology, OncoRay—National Center for Radiation Research in Oncology, Medical Faculty Carl Gustav Carus, Fetscherstraße 74, P.O. Box 41 , 01307 TU Dresden, Germany
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Cuenod C, Balvay D. Perfusion and vascular permeability: Basic concepts and measurement in DCE-CT and DCE-MRI. Diagn Interv Imaging 2013; 94:1187-204. [DOI: 10.1016/j.diii.2013.10.010] [Citation(s) in RCA: 138] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Faye N, Clément O, Balvay D, Fitoussi V, Pidial L, Sandoval F, Autret G, Silvestre JS, Dean CL, Alison M, Fournier LS. Multiparametric optical and MR imaging demonstrate inhibition of tumor angiogenesis natural history by mural cell therapy. Magn Reson Med 2013; 72:841-9. [DOI: 10.1002/mrm.24970] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2013] [Revised: 08/08/2013] [Accepted: 09/05/2013] [Indexed: 11/07/2022]
Affiliation(s)
- Nathalie Faye
- Université Paris Descartes Sorbonne Paris Cité; INSERM UMR-S970 Paris France
- CHRU Lille; Hôpital Jeanne de Flandre; Women medical imaging Lille France
| | - Olivier Clément
- Université Paris Descartes Sorbonne Paris Cité; INSERM UMR-S970 Paris France
- Assistance Publique-Hôpitaux de Paris; Hôpital Européen Georges Pompidou; Radiology Department Paris France
| | - Daniel Balvay
- Université Paris Descartes Sorbonne Paris Cité; INSERM UMR-S970 Paris France
| | - Victor Fitoussi
- Université Paris Descartes Sorbonne Paris Cité; INSERM UMR-S970 Paris France
| | - Laetitia Pidial
- Université Paris Descartes Sorbonne Paris Cité; INSERM UMR-S970 Paris France
| | - Federico Sandoval
- Université Paris Descartes Sorbonne Paris Cité; INSERM UMR-S970 Paris France
| | - Gwennhael Autret
- Université Paris Descartes Sorbonne Paris Cité; INSERM UMR-S970 Paris France
| | | | | | - Marianne Alison
- Université Paris Descartes Sorbonne Paris Cité; INSERM UMR-S970 Paris France
| | - Laure S. Fournier
- Université Paris Descartes Sorbonne Paris Cité; INSERM UMR-S970 Paris France
- Assistance Publique-Hôpitaux de Paris; Hôpital Européen Georges Pompidou; Radiology Department Paris France
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Fitoussi V, Faye N, Chamming's F, Clement O, Cuenod CA, Fournier LS. In vivo imaging of tumor angiogenesis using fluorescence confocal videomicroscopy. J Vis Exp 2013. [PMID: 24056503 DOI: 10.3791/50347] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
Fibered confocal fluorescence in vivo imaging with a fiber optic bundle uses the same principle as fluorescent confocal microscopy. It can excite fluorescent in situ elements through the optical fibers, and then record some of the emitted photons, via the same optical fibers. The light source is a laser that sends the exciting light through an element within the fiber bundle and as it scans over the sample, recreates an image pixel by pixel. As this scan is very fast, by combining it with dedicated image processing software, images in real time with a frequency of 12 frames/sec can be obtained. We developed a technique to quantitatively characterize capillary morphology and function, using a confocal fluorescence videomicroscopy device. The first step in our experiment was to record 5 sec movies in the four quadrants of the tumor to visualize the capillary network. All movies were processed using software (ImageCell, Mauna Kea Technology, Paris France) that performs an automated segmentation of vessels around a chosen diameter (10 μm in our case). Thus, we could quantify the 'functional capillary density', which is the ratio between the total vessel area and the total area of the image. This parameter was a surrogate marker for microvascular density, usually measured using pathology tools. The second step was to record movies of the tumor over 20 min to quantify leakage of the macromolecular contrast agent through the capillary wall into the interstitium. By measuring the ratio of signal intensity in the interstitium over that in the vessels, an 'index leakage' was obtained, acting as a surrogate marker for capillary permeability.
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Affiliation(s)
- Victor Fitoussi
- Université Paris Descartes Sorbonne Paris Cité, INSERM UMR-S970
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