2.50
Hdl Handle:
http://hdl.handle.net/10541/95180
Title:
Interstitial photodynamic therapy in the canine prostate.
Authors:
Lee, L K; Whitehurst, Colin; Chen, Q; Pantelides, M L; Hetzel, F W; Moore, James V
Abstract:
OBJECTIVE: To determine the depth of tissue destruction and the minimum light dose required for necrosis in interstitial photodynamic therapy (PDT), as a prerequisite for the investigational therapy of patients. MATERIALS AND METHODS: Seven adult beagle dogs were given 2 mg/kg of the photosensitizer Photofrin intravenously and two controls received none. After 24 h, 450 J/cm of 630 nm wavelength laser light was delivered interstitially to the prostate via a 2 cm long diffuser fibre. Seven single-fibre treatments were performed in five sensitized dogs and two single-fibre treatments in the controls. The two remaining sensitized dogs had two fibres placed 10 mm apart within the prostate to determine the coalescence of PDT lesions. The penetration depth of light was measured in all prostates, and after PDT the extent of necrosis was assessed histologically. RESULTS: The mean (standard deviation, SD) radius of PDT destruction around each diffuser was 5.3 (1.4) mm and PDT lesions overlapped in prostates treated with two fibres placed 10 mm apart. There was no observable tissue damage in the controls. The mean (SD) minimum light dose required for PDT necrosis was 84 (64) J/cm2. Differences among animals in the light penetration depth were small, with a mean of 2.14 (0.2) mm, and did not correlate with the depth of necrosis (P = 0.07). Bleeding around the optical diffuser fibre impeded light penetration. CONCLUSION: Interstitial PDT in the canine prostate using Photofrin produced modest volumes of tissue necrosis. The minimum light dose required to induce necrosis was variable because bleeding was unpredictable in relation to the optical fibre.
Affiliation:
CRC Department of Experimental Radiation Oncology, Paterson Institute for Cancer Research, Christie Hospital NHS Trust, Manchester, UK.
Citation:
Interstitial photodynamic therapy in the canine prostate. 1997, 80 (6):898-902 Br J Urol
Journal:
British Journal of Urology
Issue Date:
Dec-1997
URI:
http://hdl.handle.net/10541/95180
DOI:
10.1046/j.1464-410X.1997.00460.x
PubMed ID:
9439405
Type:
Article
Language:
en
ISSN:
0007-1331
Appears in Collections:
All Paterson Institute for Cancer Research

Full metadata record

DC FieldValue Language
dc.contributor.authorLee, L Ken
dc.contributor.authorWhitehurst, Colinen
dc.contributor.authorChen, Qen
dc.contributor.authorPantelides, M Len
dc.contributor.authorHetzel, F Wen
dc.contributor.authorMoore, James Ven
dc.date.accessioned2010-03-29T14:21:56Z-
dc.date.available2010-03-29T14:21:56Z-
dc.date.issued1997-12-
dc.identifier.citationInterstitial photodynamic therapy in the canine prostate. 1997, 80 (6):898-902 Br J Urolen
dc.identifier.issn0007-1331-
dc.identifier.pmid9439405-
dc.identifier.doi10.1046/j.1464-410X.1997.00460.x-
dc.identifier.urihttp://hdl.handle.net/10541/95180-
dc.description.abstractOBJECTIVE: To determine the depth of tissue destruction and the minimum light dose required for necrosis in interstitial photodynamic therapy (PDT), as a prerequisite for the investigational therapy of patients. MATERIALS AND METHODS: Seven adult beagle dogs were given 2 mg/kg of the photosensitizer Photofrin intravenously and two controls received none. After 24 h, 450 J/cm of 630 nm wavelength laser light was delivered interstitially to the prostate via a 2 cm long diffuser fibre. Seven single-fibre treatments were performed in five sensitized dogs and two single-fibre treatments in the controls. The two remaining sensitized dogs had two fibres placed 10 mm apart within the prostate to determine the coalescence of PDT lesions. The penetration depth of light was measured in all prostates, and after PDT the extent of necrosis was assessed histologically. RESULTS: The mean (standard deviation, SD) radius of PDT destruction around each diffuser was 5.3 (1.4) mm and PDT lesions overlapped in prostates treated with two fibres placed 10 mm apart. There was no observable tissue damage in the controls. The mean (SD) minimum light dose required for PDT necrosis was 84 (64) J/cm2. Differences among animals in the light penetration depth were small, with a mean of 2.14 (0.2) mm, and did not correlate with the depth of necrosis (P = 0.07). Bleeding around the optical diffuser fibre impeded light penetration. CONCLUSION: Interstitial PDT in the canine prostate using Photofrin produced modest volumes of tissue necrosis. The minimum light dose required to induce necrosis was variable because bleeding was unpredictable in relation to the optical fibre.en
dc.language.isoenen
dc.subject.meshAnimals-
dc.subject.meshAntineoplastic Agents-
dc.subject.meshDihematoporphyrin Ether-
dc.subject.meshDogs-
dc.subject.meshMale-
dc.subject.meshNecrosis-
dc.subject.meshPhotochemotherapy-
dc.subject.meshPhotosensitizing Agents-
dc.subject.meshProstate-
dc.subject.meshProstatic Diseases-
dc.titleInterstitial photodynamic therapy in the canine prostate.en
dc.typeArticleen
dc.contributor.departmentCRC Department of Experimental Radiation Oncology, Paterson Institute for Cancer Research, Christie Hospital NHS Trust, Manchester, UK.en
dc.identifier.journalBritish Journal of Urologyen

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