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Radiation therapy o...
Radiation therapy of small cell lung cancer with 177Lu-DOTA-Tyr3-octreotate in an animal model
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- Schmitt, Anneli, 1971 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för särskilda specialiteter, Avdelningen för radiofysik,Institute of Selected Clinical Sciences, Department of Radiation Physics
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- Bernhardt, Peter, 1966 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för särskilda specialiteter, Avdelningen för radiofysik,Institute of Selected Clinical Sciences, Department of Radiation Physics
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- Nilsson, Ola, 1957 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för laboratoriemedicin , Avdelningen för patologi,Institute of Laboratory Medicine, Dept of Pathology
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- Ahlman, Håkan, 1947 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för de kirurgiska disciplinerna, Avdelningen för kirurgi,Institute of Surgical Sciences, Department of Surgery
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- Kölby, Lars, 1963 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för de kirurgiska disciplinerna, Avdelningen för kirurgi,Institute of Surgical Sciences, Department of Surgery
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Maecke, H. R. (författare)
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- Forssell-Aronsson, Eva, 1961 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för särskilda specialiteter, Avdelningen för radiofysik,Institute of Selected Clinical Sciences, Department of Radiation Physics
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(creator_code:org_t)
- 2004
- 2004
- Engelska.
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Ingår i: Journal of nuclear medicine. - 0161-5505. ; 45:9, s. 1542-8
- Relaterad länk:
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https://gup.ub.gu.se...
Abstract
Ämnesord
Stäng
- Small cell lung cancer (SCLC) is a tumor of neuroendocrine (NE) origin with very low survival rate. Somatostatin receptor scintigraphy using 111In-DTPA-octreotide (DTPA is diethylenetriaminepentaacetic acid) is a well-established method for the visualization of somatostatin receptor-expressing NE tumors. Recently, new combinations of radionuclides and somatostatin analogs have been investigated for therapeutic purposes. In this study, the somatostatin analog DOTA-Tyr3-octreotate (DOTA is 1,4,7,10-tetraazacyclododecane-N,N',N",N"'-tetraacetic acid), labeled with the medium-energy electron emitter 177Lu (maximal electron energy = 498 keV, half-life = 6.6 d), was used for radiation therapy of human SCLC in an animal model. METHODS: Nude mice, bearing tumors from the human SCLC cell line NCI-H69, were injected intravenously with 177Lu-DOTA-Tyr3-octreotate. Groups of animals (n = 5 or 6) were injected with 45-, 60-, and 120-MBq fractions and two 45-MBq fractions 48 h apart. Furthermore, 1 control group was treated with unlabeled DOTA-Tyr3-octreotate and another control group was not treated. RESULTS: In both control groups, the tumor volumes were increased 2-fold in approximately 5 d. Treatment with 177Lu-DOTA-Tyr3-octreotate resulted in marked tumor regression with statistically significant tumor volume reduction after 1 wk (P < 0.001). The tumor growth delay time was dependent on the amount of injected activity for the groups with single injections, 26 d for 60 MBq and 40 d for 120 MBq. The best therapeutic effect was obtained in mice injected with 2 fractions of 45 MBq. The relative tumor volume after 1 mo was 0.004 +/- 0.004. CONCLUSION: Radiation therapy with 177Lu-DOTA-Tyr3-octreotate on SCLC-bearing mice was successful. Since the experiments were performed on a human SCLC cell line xenografted to nude mice, the results may be clinically relevant and treatment with 177Lu-DOTA-Tyr3-octreotate could be a treatment alternative in this tumor disease that normally has a dismal prognosis.
Nyckelord
- Animals
- Carcinoma
- Small Cell/*metabolism/*radiotherapy
- Disease Models
- Animal
- Injections
- Intravenous
- Lung Neoplasms/metabolism/radiotherapy
- Male
- Metabolic Clearance Rate
- Mice
- Mice
- Inbred BALB C
- Mice
- Nude
- Organ Specificity
- dosage/*pharmacokinetics/*therapeutic use
- Radiopharmaceuticals/administration & dosage/pharmacokinetics/therapeutic
- use
- Tissue Distribution
- Treatment Outcome
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Schmitt, Anneli, ...
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Bernhardt, Peter ...
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Nilsson, Ola, 19 ...
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Ahlman, Håkan, 1 ...
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Kölby, Lars, 196 ...
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Maecke, H. R.
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Forssell-Aronsso ...
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Journal of nucle ...
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Göteborgs universitet