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  1. Article: Vaccinia virus and peptide-receptor radiotherapy synergize to improve treatment of peritoneal carcinomatosis.

    Ottolino-Perry, Kathryn / Mealiea, David / Sellers, Clara / Acuna, Sergio A / Angarita, Fernando A / Okamoto, Lili / Scollard, Deborah / Ginj, Mihaela / Reilly, Raymond / McCart, J Andrea

    Molecular therapy oncolytics

    2023  Volume 29, Page(s) 44–58

    Abstract: Tumor-specific overexpression of receptors enables a variety of targeted cancer therapies, exemplified by peptide-receptor radiotherapy (PRRT) for somatostatin receptor (SSTR)-positive neuroendocrine tumors. While effective, PRRT is restricted to tumors ... ...

    Abstract Tumor-specific overexpression of receptors enables a variety of targeted cancer therapies, exemplified by peptide-receptor radiotherapy (PRRT) for somatostatin receptor (SSTR)-positive neuroendocrine tumors. While effective, PRRT is restricted to tumors with SSTR overexpression. To overcome this limitation, we propose using oncolytic vaccinia virus (vvDD)-mediated receptor gene transfer to permit molecular imaging and PRRT in tumors without endogenous SSTR overexpression, a strategy termed radiovirotherapy. We hypothesized that vvDD-SSTR combined with a radiolabeled somatostatin analog could be deployed as radiovirotherapy in a colorectal cancer peritoneal carcinomatosis model, producing tumor-specific radiopeptide accumulation. Following vvDD-SSTR and
    Language English
    Publishing date 2023-04-10
    Publishing country United States
    Document type Journal Article
    ISSN 2372-7705
    ISSN 2372-7705
    DOI 10.1016/j.omto.2023.04.001
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Can Imaging Put the "

    DaCosta, Ralph S / Ottolino-Perry, Kathryn / Banerjee, Jaideep

    Advances in wound care

    2016  Volume 5, Issue 8, Page(s) 329–331

    Abstract: An effective, scientifically validated, diagnostic tool helps clinicians make better, timely, and more objective medical decisions in the care of their patients. Today, the need for such tools is especially urgent in the field of wound care where patient- ...

    Abstract An effective, scientifically validated, diagnostic tool helps clinicians make better, timely, and more objective medical decisions in the care of their patients. Today, the need for such tools is especially urgent in the field of wound care where patient-centric care is the goal, under ever tightening clinical budget constraints. In an era of countless "innovative" treatment options, that is, advanced dressings, negative pressure devices, and various debridement instruments available to the wound care clinical team, one area that has arguably languished in the past decade has been
    Language English
    Publishing date 2016-08-01
    Publishing country United States
    Document type Editorial
    ZDB-ID 2650541-1
    ISSN 2162-1934 ; 2162-1918
    ISSN (online) 2162-1934
    ISSN 2162-1918
    DOI 10.1089/wound.2016.0702
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Mounting a strategic offense: fighting tumor vasculature with oncolytic viruses.

    Angarita, Fernando A / Acuna, Sergio A / Ottolino-Perry, Kathryn / Zerhouni, Siham / McCart, J Andrea

    Trends in molecular medicine

    2013  Volume 19, Issue 6, Page(s) 378–392

    Abstract: Blood supply within a tumor drives progression and ultimately allows for metastasis. Many anticancer therapies target tumor vasculature, but their individual effectiveness is limited because they induce indirect cell death. Agents that disrupt nascent ... ...

    Abstract Blood supply within a tumor drives progression and ultimately allows for metastasis. Many anticancer therapies target tumor vasculature, but their individual effectiveness is limited because they induce indirect cell death. Agents that disrupt nascent and/or established tumor vasculature while simultaneously killing cancer cells would certainly have a greater impact. Oncolytic virotherapy utilizes attenuated viruses that replicate specifically within a tumor. They induce cytotoxicity through a combination of direct cell lysis, antitumor immune stimulation, and recently identified antitumor vascular effects. This review summarizes the novel preclinical and clinical evidence regarding the antitumor vascular effects of oncolytic viruses, which include infection and lysis of tumor endothelial cells, natural or genetically engineered antiangiogenic properties, and combination therapy with clinically approved antivascular agents.
    MeSH term(s) Animals ; Humans ; Neoplasms/blood supply ; Neoplasms/pathology ; Neoplasms/therapy ; Neoplasms/virology ; Neovascularization, Pathologic ; Oncolytic Virotherapy ; Oncolytic Viruses/genetics ; Oncolytic Viruses/physiology ; Virus Replication
    Language English
    Publishing date 2013-06
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 2036490-8
    ISSN 1471-499X ; 1471-4914
    ISSN (online) 1471-499X
    ISSN 1471-4914
    DOI 10.1016/j.molmed.2013.02.008
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Oncolytic vaccinia virus synergizes with irinotecan in colorectal cancer.

    Ottolino-Perry, Kathryn / Acuna, Sergio A / Angarita, Fernando A / Sellers, Clara / Zerhouni, Siham / Tang, Nan / McCart, J Andrea

    Molecular oncology

    2015  Volume 9, Issue 8, Page(s) 1539–1552

    Abstract: Metastatic colorectal cancer (CRC) is complex clinical challenge for which there are limited treatment options. Chemotherapy with or without surgery provides moderate improvements in overall survival and quality of life; nevertheless the 5-year survival ... ...

    Abstract Metastatic colorectal cancer (CRC) is complex clinical challenge for which there are limited treatment options. Chemotherapy with or without surgery provides moderate improvements in overall survival and quality of life; nevertheless the 5-year survival remains below 30%. Oncolytic vaccinia virus (VV) shows strong anti-tumour activity in models of CRC, however transient delays in disease progression are insufficient to lead to long-term survival. Here we examined the efficacy of VV with oxaliplatin or SN-38 (active metabolite of irinotecan) in CRC cell lines in vitro and VV with irinotecan in an orthotopic model of metastatic CRC. Synergistic improvements in in vitro cell killing were observed in multiple cell lines. Combination therapy was well tolerated in tumour-bearing mice and the median survival was significantly increased relative to monotherapy despite a drug-dependent decrease in the mean tumour titer. Increased apoptosis following in vitro and in vivo combination therapy was observed. In vitro cell cycle analysis showed increases in S-phase cells following infection occurred in both infected and uninfected cell populations. This corresponded to a 4-fold greater increase in apoptosis in the uninfected compared to infected cells following combination therapy. Combination treatment strategies are among the best options for patients with advanced cancers. VV is currently under clinical investigation in patients with CRC and the data presented here suggest that its combination with irinotecan may provide benefit to a subset of CRC patients. Further, investigation of this combination is necessary to determine the tumour characteristics responsible for mediating synergy.
    MeSH term(s) Animals ; Antineoplastic Combined Chemotherapy Protocols/therapeutic use ; Camptothecin/administration & dosage ; Camptothecin/analogs & derivatives ; Camptothecin/therapeutic use ; Cells, Cultured ; Chlorocebus aethiops ; Colorectal Neoplasms/drug therapy ; Colorectal Neoplasms/pathology ; Colorectal Neoplasms/therapy ; Combined Modality Therapy ; Drug Synergism ; Female ; HT29 Cells ; Humans ; Irinotecan ; Mice ; Mice, Inbred BALB C ; Mice, Nude ; Oncolytic Virotherapy ; Oncolytic Viruses ; Organoplatinum Compounds/administration & dosage ; Oxaliplatin ; Vaccinia virus
    Chemical Substances Organoplatinum Compounds ; Oxaliplatin (04ZR38536J) ; Irinotecan (7673326042) ; Camptothecin (XT3Z54Z28A)
    Language English
    Publishing date 2015-05-06
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2415106-3
    ISSN 1878-0261 ; 1574-7891
    ISSN (online) 1878-0261
    ISSN 1574-7891
    DOI 10.1016/j.molonc.2015.04.009
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Improved detection of clinically relevant wound bacteria using autofluorescence image-guided sampling in diabetic foot ulcers.

    Ottolino-Perry, Kathryn / Chamma, Emilie / Blackmore, Kristina M / Lindvere-Teene, Liis / Starr, Danielle / Tapang, Kim / Rosen, Cheryl F / Pitcher, Bethany / Panzarella, Tony / Linden, Ron / DaCosta, Ralph S

    International wound journal

    2017  Volume 14, Issue 5, Page(s) 833–841

    Abstract: Clinical wound assessment involves microbiological swabbing of wounds to identify and quantify bacterial species, and to determine microbial susceptibility to antibiotics. The Levine swabbing technique may be suboptimal because it samples only the wound ... ...

    Abstract Clinical wound assessment involves microbiological swabbing of wounds to identify and quantify bacterial species, and to determine microbial susceptibility to antibiotics. The Levine swabbing technique may be suboptimal because it samples only the wound bed, missing other diagnostically relevant areas of the wound, which may contain clinically significant bacteria. Thus, there is a clinical need to improve the reliability of microbiological wound sampling. To address this, a handheld portable autofluorescence (AF) imaging device that detects bacteria in real time, without contrast agents, was developed. Here, we report the results of a clinical study evaluating the use of real-time AF imaging to visualise bacteria in and around the wound bed and to guide swabbing during the clinical assessment of diabetic foot ulcers, compared with the Levine technique. We investigated 33 diabetic foot ulcers (n = 31 patients) and found that AF imaging more accurately identified the presence of moderate and/or heavy bacterial load compared with the Levine technique (accuracy 78% versus 52%, P = 0·048; adjusted diagnostic odds ratio 7·67, P < 0·00022 versus 3·07, P = 0·066) and maximised the effectiveness of bacterial load sampling, with no significant impact on clinical workflow. AF imaging may help clinicians better identify the wound areas with clinically significant bacteria, and maximise sampling of treatment-relevant pathogens.
    MeSH term(s) Adult ; Aged ; Aged, 80 and over ; Bacteria/isolation & purification ; Bacterial Load/instrumentation ; Diabetic Foot/microbiology ; Female ; Humans ; Male ; Middle Aged ; Optical Imaging ; Reproducibility of Results ; Specimen Handling/methods ; Wound Infection/diagnosis ; Wound Infection/microbiology ; Young Adult
    Language English
    Publishing date 2017-02-28
    Publishing country England
    Document type Comparative Study ; Journal Article
    ZDB-ID 2170920-8
    ISSN 1742-481X ; 1742-4801
    ISSN (online) 1742-481X
    ISSN 1742-4801
    DOI 10.1111/iwj.12717
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Oncolytic vaccinia virus as an adjuvant treatment to cytoreductive surgery for malignant peritoneal mesothelioma.

    Acuna, Sergio A / Ottolino-Perry, Kathryn / Çako, Besmira / Tang, Nan / Angarita, Fernando A / McCart, J Andrea

    Annals of surgical oncology

    2014  Volume 21, Issue 7, Page(s) 2259–2266

    Abstract: Background: Malignant peritoneal mesothelioma (MPM) is an aggressive cancer with a dismal prognosis. Oncolytic viruses are a promising new therapy for cancer because of their ability to kill tumor cells with minimal toxicity to normal tissues. This ... ...

    Abstract Background: Malignant peritoneal mesothelioma (MPM) is an aggressive cancer with a dismal prognosis. Oncolytic viruses are a promising new therapy for cancer because of their ability to kill tumor cells with minimal toxicity to normal tissues. This experimental study aimed to examine the potential of modified vaccinia virus (VV) to treat MPM when administered alone or as an adjuvant treatment to surgery.
    Methods: Two aggressive murine mesothelioma cell lines (AC29, AB12), were used. Cell viability and viral cytopathic effects were assessed using MTS and crystal violet assays. Immunocompetent mice were injected intraperitoneally with MPM cells and treated with intraperitoneal VV. Tumor-bearing mice also underwent cytoreductive surgery (CRS) followed by VV (or control) therapy.
    Results: The cytotoxic effects of VV on MPM cell lines was significantly increased compared with the control non-cancer cell line. In both orthotopic models, VV induced tumor regression, prolonging median and long-term survival. VV treatment after incomplete CRS was not superior to VV alone; however, when mice with microscopic disease were treated with VV, further prolongation of median and long-term survivals was observed.
    Conclusions: VV selectively kills MPM cells in vitro and leads to improved survival and cures in immunocompetent murine models. Higher efficacy of the virus in the microscopic disease context suggests the use of the virus as an adjuvant treatment to complete surgical resection. These promising results justify further studies of VV in humans as a novel treatment for MPM.
    MeSH term(s) Adjuvants, Immunologic ; Animals ; Apoptosis ; Cell Proliferation ; Combined Modality Therapy ; Cytoreduction Surgical Procedures ; Female ; Humans ; Immunoenzyme Techniques ; Lung Neoplasms/mortality ; Lung Neoplasms/pathology ; Lung Neoplasms/therapy ; Mesothelioma/mortality ; Mesothelioma/pathology ; Mesothelioma/therapy ; Mesothelioma, Malignant ; Mice ; Mice, Inbred BALB C ; Mice, Inbred CBA ; Mice, SCID ; Oncolytic Virotherapy ; Peritoneal Neoplasms/mortality ; Peritoneal Neoplasms/pathology ; Peritoneal Neoplasms/therapy ; Survival Rate ; Tumor Cells, Cultured ; Vaccinia virus/physiology ; Virus Replication
    Chemical Substances Adjuvants, Immunologic
    Language English
    Publishing date 2014-04-10
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1200469-8
    ISSN 1534-4681 ; 1068-9265
    ISSN (online) 1534-4681
    ISSN 1068-9265
    DOI 10.1245/s10434-014-3651-4
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  7. Article ; Online: Intraoperative fluorescence imaging with aminolevulinic acid detects grossly occult breast cancer: a phase II randomized controlled trial.

    Ottolino-Perry, Kathryn / Shahid, Anam / DeLuca, Stephanie / Son, Viktor / Sukhram, Mayleen / Meng, Fannong / Liu, Zhihui Amy / Rapic, Sara / Anantha, Nayana Thalanki / Wang, Shirley C / Chamma, Emilie / Gibson, Christopher / Medeiros, Philip J / Majeed, Safa / Chu, Ashley / Wignall, Olivia / Pizzolato, Alessandra / Rosen, Cheryl F / Teene, Liis Lindvere /
    Starr-Dunham, Danielle / Kulbatski, Iris / Panzarella, Tony / Done, Susan J / Easson, Alexandra M / Leong, Wey L / DaCosta, Ralph S

    Breast cancer research : BCR

    2021  Volume 23, Issue 1, Page(s) 72

    Abstract: Background: Re-excision due to positive margins following breast-conserving surgery (BCS) negatively affects patient outcomes and healthcare costs. The inability to visualize margin involvement is a significant challenge in BCS. 5-Aminolevulinic acid ... ...

    Abstract Background: Re-excision due to positive margins following breast-conserving surgery (BCS) negatively affects patient outcomes and healthcare costs. The inability to visualize margin involvement is a significant challenge in BCS. 5-Aminolevulinic acid hydrochloride (5-ALA HCl), a non-fluorescent oral prodrug, causes intracellular accumulation of fluorescent porphyrins in cancer cells. This single-center Phase II randomized controlled trial evaluated the safety, feasibility, and diagnostic accuracy of a prototype handheld fluorescence imaging device plus 5-ALA for intraoperative visualization of invasive breast carcinomas during BCS.
    Methods: Fifty-four patients were enrolled and randomized to receive no 5-ALA or oral 5-ALA HCl (15 or 30 mg/kg). Forty-five patients (n = 15/group) were included in the analysis. Fluorescence imaging of the excised surgical specimen was performed, and biopsies were collected from within and outside the clinically demarcated tumor border of the gross specimen for blinded histopathology.
    Results: In the absence of 5-ALA, tissue autofluorescence imaging lacked tumor-specific fluorescent contrast. Both 5-ALA doses caused bright red tumor fluorescence, with improved visualization of tumor contrasted against normal tissue autofluorescence. In the 15 mg/kg 5-ALA group, the positive predictive value (PPV) for detecting breast cancer inside and outside the grossly demarcated tumor border was 100.0% and 55.6%, respectively. In the 30 mg/kg 5-ALA group, the PPV was 100.0% and 50.0% inside and outside the demarcated tumor border, respectively. No adverse events were observed, and clinical feasibility of this imaging device-5-ALA combination approach was confirmed.
    Conclusions: This is the first known clinical report of visualization of 5-ALA-induced fluorescence in invasive breast carcinoma using a real-time handheld intraoperative fluorescence imaging device.
    Trial registration: Clinicaltrials.gov identifier NCT01837225 . Registered 23 April 2013.
    MeSH term(s) Adult ; Aged ; Aged, 80 and over ; Aminolevulinic Acid/therapeutic use ; Biopsy ; Breast Neoplasms/diagnostic imaging ; Breast Neoplasms/pathology ; Breast Neoplasms/surgery ; Contrast Media/therapeutic use ; Female ; Fluorescence ; Humans ; Intraoperative Care ; Margins of Excision ; Mastectomy, Segmental ; Middle Aged ; Optical Imaging/instrumentation ; Optical Imaging/methods ; Predictive Value of Tests ; Surgery, Computer-Assisted
    Chemical Substances Contrast Media ; Aminolevulinic Acid (88755TAZ87)
    Language English
    Publishing date 2021-07-12
    Publishing country England
    Document type Clinical Trial, Phase II ; Journal Article ; Randomized Controlled Trial ; Research Support, Non-U.S. Gov't
    ZDB-ID 2015059-3
    ISSN 1465-542X ; 1465-5411
    ISSN (online) 1465-542X
    ISSN 1465-5411
    DOI 10.1186/s13058-021-01442-7
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Antiproliferative effects of 111In- or 177Lu-DOTATOC on cells exposed to low multiplicity-of-infection double-deleted vaccinia virus encoding somatostatin subtype-2 receptor.

    Akinlolu, Olayinka / Ottolino-Perry, Kathryn / McCart, Judith Andrea / Reilly, Raymond M

    Cancer biotherapy & radiopharmaceuticals

    2010  Volume 25, Issue 3, Page(s) 325–333

    Abstract: Oncolytic viruses may be limited in their ability to infect and lyse tumor cells because of penetration barriers and viral elimination by the immune system. Combining virotherapy with targeted radiotherapy that uses (111)In- or (177)Lu-DOTATOC may ... ...

    Abstract Oncolytic viruses may be limited in their ability to infect and lyse tumor cells because of penetration barriers and viral elimination by the immune system. Combining virotherapy with targeted radiotherapy that uses (111)In- or (177)Lu-DOTATOC may address such issues by spatially enhancing antitumor effects through bystander and/or cross-fire phenomena. In this study, a double-deleted vaccinia virus (vvDD) encoding the gene for somatostatin subtype-2 receptor (sstr-2) infected MC-38 murine colon adenocarcinoma cells and increased their sstr-2 expression by 2-fold. A low multiplicity-of-infection (MOI = 0.1) of vvDD and short exposure time (48 hours) preserved MC-38 viability (>80%-90%) for up to 3 days, permitting targeting of sstr-2 by (111)In- or (177)Lu-DOTATOC. (111)In-DOTATOC, alone or in combination with vvDD, was less effective than (177)Lu-DOTATOC at decreasing the growth of sstr-2-gene-transfected human embryonic kidney (HEK)-293 cells or MC-38 cells in monolayer. However, (111)In- or (177)Lu-DOTATOC combined with vvDD provided equivalent growth inhibition of HEK-293 or MC-38 cells as spheroids, suggesting a bystander effect from (111)In-DOTATOC. Growth of the cells was reduced 4-fold (from 20% to <5%) at 8 days in this case. Further evaluation of low-MOI vvDD in combination with (111)In- or (177)Lu-DOTATOC for the treatment of MC-38 tumors in mice is planned.
    MeSH term(s) Adenocarcinoma ; Animals ; Cell Line ; Cell Line, Tumor ; Cell Membrane/metabolism ; Cell Nucleus/metabolism ; Cell Proliferation/radiation effects ; Colonic Neoplasms ; Combined Modality Therapy/methods ; Cytoplasm/metabolism ; Gene Deletion ; Humans ; Mice ; Neoplasms/radiotherapy ; Neoplasms/therapy ; Octreotide/analogs & derivatives ; Octreotide/metabolism ; Octreotide/pharmacology ; Oncolytic Virotherapy/methods ; Radiation Dosage ; Radiopharmaceuticals/metabolism ; Radiopharmaceuticals/pharmacology ; Receptors, Somatostatin/genetics ; Receptors, Somatostatin/metabolism ; Transfection ; Vaccinia virus/genetics ; Vaccinia virus/physiology
    Chemical Substances 111In-DOTA-TOC ; 177Lu-octreotide, DOTA(0)-Tyr(3)- ; Radiopharmaceuticals ; Receptors, Somatostatin ; somatostatin receptor 2 (D73QL0OMU2) ; Octreotide (RWM8CCW8GP)
    Language English
    Publishing date 2010-06-23
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1315649-4
    ISSN 1557-8852 ; 1084-9785
    ISSN (online) 1557-8852
    ISSN 1084-9785
    DOI 10.1089/cbr.2009.0713
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  9. Article ; Online: Intelligent design: combination therapy with oncolytic viruses.

    Ottolino-Perry, Kathryn / Diallo, Jean-Simon / Lichty, Brian D / Bell, John C / McCart, J Andrea

    Molecular therapy : the journal of the American Society of Gene Therapy

    2009  Volume 18, Issue 2, Page(s) 251–263

    Abstract: Metastatic cancer remains an incurable disease in the majority of cases and thus novel treatment strategies such as oncolytic virotherapy are rapidly advancing toward clinical use. In order to be successful, it is likely that some type of combination ... ...

    Abstract Metastatic cancer remains an incurable disease in the majority of cases and thus novel treatment strategies such as oncolytic virotherapy are rapidly advancing toward clinical use. In order to be successful, it is likely that some type of combination therapy will be necessary to have a meaningful impact on this disease. Although it may be tempting to simply combine an oncolytic virus with the existing standard radiation or chemotherapeutics, the long-term goal of such treatments must be to have a rational, potentially synergistic combination strategy that can be safely and easily used in the clinical setting. The combination of oncolytic virotherapy with existing radiotherapy and chemotherapy modalities is reviewed along with novel biologic therapies including immunotherapies, in order to help investigators make intelligent decisions during the clinical development of these products.
    MeSH term(s) Combined Modality Therapy/methods ; Humans ; Neoplasms/drug therapy ; Neoplasms/radiotherapy ; Neoplasms/therapy ; Oncolytic Virotherapy/methods
    Language English
    Publishing date 2009-12-22
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 2010592-7
    ISSN 1525-0024 ; 1525-0016
    ISSN (online) 1525-0024
    ISSN 1525-0016
    DOI 10.1038/mt.2009.283
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  10. Article ; Online: Tumor vascularization is critical for oncolytic vaccinia virus treatment of peritoneal carcinomatosis.

    Ottolino-Perry, Kathryn / Tang, Nan / Head, Renee / Ng, Calvin / Arulanandam, Rozanne / Angarita, Fernando A / Acuna, Sergio A / Chen, Yonghong / Bell, John / Dacosta, Ralph S / McCart, J Andrea

    International journal of cancer

    2014  Volume 134, Issue 3, Page(s) 717–730

    Abstract: Peritoneal carcinomatosis (PC) represents a significant clinical challenge for which there are few treatment options. Oncolytic viruses are ideal candidates for PC treatment because of their high tumor specificity, excellent safety profile and ... ...

    Abstract Peritoneal carcinomatosis (PC) represents a significant clinical challenge for which there are few treatment options. Oncolytic viruses are ideal candidates for PC treatment because of their high tumor specificity, excellent safety profile and suitability for peritoneal delivery. Here, we described the use of vvDD-SR-RFP, a recombinant vaccinia virus, in xenograft and syngeneic models of colorectal PC. Colorectal cancer cell lines were highly susceptible to vvDD-SR-RFP replication and cytotoxicity. Intraperitoneal delivery of vvDD-SR-RFP on Day 12 to mice with colorectal carcinomatosis significantly improved survival whereas survival was not improved following virus treatment on Day 8, when tumors were smaller. Immunohistochemistry revealed early tumors had a poorly distributed network of blood vessels and lower proliferation index compared to later tumors. Virus infection was also restricted to tumor rims following Day 8 treatment, whereas it was disseminated in tumors treated on Day 12. Additionally, direct infection of tumor endothelium was observed and virus infection correlated with a loss of endothelial staining and induction of cell death. Our results demonstrate that tumor vasculature has a critical role in virus delivery and tumor response. This will have significant implications in the clinical setting, both in understanding timing of therapies and in designing combination treatment strategies.
    MeSH term(s) Animals ; Carcinoma/blood supply ; Carcinoma/pathology ; Carcinoma/therapy ; Cell Proliferation ; Humans ; Mice ; Mice, Inbred C57BL ; Mice, Inbred NOD ; Mice, SCID ; Oncolytic Virotherapy ; Peritoneal Neoplasms/blood supply ; Peritoneal Neoplasms/pathology ; Peritoneal Neoplasms/therapy ; Vaccinia virus/physiology ; Xenograft Model Antitumor Assays
    Language English
    Publishing date 2014-02-01
    Publishing country United States
    Document type Journal Article
    ZDB-ID 218257-9
    ISSN 1097-0215 ; 0020-7136
    ISSN (online) 1097-0215
    ISSN 0020-7136
    DOI 10.1002/ijc.28395
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