TY - JOUR
T1 - Evaluation of a B-cell leukemia-lymphoma 2- specific radiolabeled peptide nucleic acid- peptide conjugate for scintigraphic detection of neoplastic lymphocytes in dogs with B-cell lymphoma
AU - Statham-Ringen, Kimberly A.
AU - Selting, Kimberly A.
AU - Lattimer, Jimmy C.
AU - Henry, Carolyn J.
AU - Green, Jonathan A.
AU - Bryan, Jeffrey N.
AU - Jia, Fang
AU - Lewis, Michael R.
PY - 2012/5
Y1 - 2012/5
N2 - Objective-To evaluate use of a radiolabeled peptide nucleic acid-peptide conjugate (RaPP) targeting B-cell leukemia-lymphoma 2 (BCL2) mRNA for scintigraphic detection of neoplastic lymphocytes in dogs with B-cell lymphoma and to assess associations among RaPP uptake, time to tumor progression (TTP), and BCL2 mRNA expression. Animals-11 dogs with B-cell lymphoma and 1 clinically normal dog. Procedures-Scintigraphic images were acquired 1 hour after IV injection of the RaPP. Regions of interest (ROIs) were drawn around lymph nodes, liver, and spleen; ROI intensity (relative to that of an equally sized region of muscle in the same image) was measured. Each ROI was also subjectively categorized as positive or negative for increased RaPP uptake. Expression of BCL2 mRNA was determined via quantitative reverse transcriptase PCR assay of a lymph node sample from dogs with lymphoma. Associations among imaging results, TTP, and BCL2 mRNA expression were evaluated. Results-Increased RaPP uptake was detected in affected tissues of dogs with lymphoma. Dogs with superficial cervical lymph node ROIs categorized as negative (n = 8) for increased RaPP uptake had a significantly longer TTP than did dogs for which this ROI was considered positive (2). Measured intensity of mandibular and superficial cervical lymph node ROIs was negatively associated with TTP. Associations among BCL2 mRNA and ROI intensity or TTP were not significant. Conclusions and Clinical Relevance-Increased RaPP uptake at mandibular or superficial cervical lymph node ROIs may be a negative prognostic indicator in dogs with lymphoma. A larger investigation is needed to determine clinical value of the RaPP for disease detection and prognostication.
AB - Objective-To evaluate use of a radiolabeled peptide nucleic acid-peptide conjugate (RaPP) targeting B-cell leukemia-lymphoma 2 (BCL2) mRNA for scintigraphic detection of neoplastic lymphocytes in dogs with B-cell lymphoma and to assess associations among RaPP uptake, time to tumor progression (TTP), and BCL2 mRNA expression. Animals-11 dogs with B-cell lymphoma and 1 clinically normal dog. Procedures-Scintigraphic images were acquired 1 hour after IV injection of the RaPP. Regions of interest (ROIs) were drawn around lymph nodes, liver, and spleen; ROI intensity (relative to that of an equally sized region of muscle in the same image) was measured. Each ROI was also subjectively categorized as positive or negative for increased RaPP uptake. Expression of BCL2 mRNA was determined via quantitative reverse transcriptase PCR assay of a lymph node sample from dogs with lymphoma. Associations among imaging results, TTP, and BCL2 mRNA expression were evaluated. Results-Increased RaPP uptake was detected in affected tissues of dogs with lymphoma. Dogs with superficial cervical lymph node ROIs categorized as negative (n = 8) for increased RaPP uptake had a significantly longer TTP than did dogs for which this ROI was considered positive (2). Measured intensity of mandibular and superficial cervical lymph node ROIs was negatively associated with TTP. Associations among BCL2 mRNA and ROI intensity or TTP were not significant. Conclusions and Clinical Relevance-Increased RaPP uptake at mandibular or superficial cervical lymph node ROIs may be a negative prognostic indicator in dogs with lymphoma. A larger investigation is needed to determine clinical value of the RaPP for disease detection and prognostication.
UR - http://www.scopus.com/inward/record.url?scp=84860340247&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84860340247&partnerID=8YFLogxK
U2 - 10.2460/ajvr.73.5.681
DO - 10.2460/ajvr.73.5.681
M3 - Article
C2 - 22533400
AN - SCOPUS:84860340247
SN - 0002-9645
VL - 73
SP - 681
EP - 688
JO - American journal of veterinary research
JF - American journal of veterinary research
IS - 5
ER -