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Division of Nuclear Medicine/PET

 Division of Nuclear Medicine/PET
  Small Animal Imaging Laboratory (SAIL)
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Flower Radiopharmaceutical Chemistry Laboratory
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The radiopharmaceutical chemistry research program of the Division of Nuclear Medicine at Children's Hospital Boston, directed by Alan B. Packard, Ph.D., is currently engaged in four active radiopharmaceutical chemistry research programs. These programs include:

  1. Development of New PET Radiopharmaceuticals for Measuring Multidrug Resistance

    The objective of this project is the development of 64Cu radiopharmaceuticals that are substrates for Pgp, the protein implicated in multidrug resistance (MDR) so that these compounds can be used to measure MDR prior to the initiation of chemotherapy. This project is supported by an NCI R01 Award to Dr. Packard.

  2. Evaluation of Novel 64Cu Chelates of Engineered CH2-deleted Anti-GD2 IgG for PET Imaging

    The objective of this project is the evaluation of a new 64Cu chelator for labeling monoclonal antibodies. In contrast to existing chelators, this new chelator, a derivative of a ligand known as diamsar, does not allow 64Cu to be released in vivo, eliminating the problem of high 64Cu uptake in non-target tissue, such as the liver. This is a collaborative project between Dr. Suzanne Smith (ANSTO), Dr. Jim Huston (EMD-Serono), and Dr. Packard. The project is currently supported by an NCI K08 award on which Dr. Packard is a mentor.

  3. MicroSPECT Measurement of Response to Treatment with anti-αvβ3 Chemotherapeutics using a 99mTc-labeled RGD Peptide

    The objective of this project is to determine if it is possible to use in vivo imaging with microSPECT and NC100692, a 99mTc-labeled RGD-containing peptide, to measure treatment response to an anti-αvβ3compound using an intracranial U87 model in the mouse. This project is a collaboration between Dr. Mark Kieran (Dana-Farber Cancer Institute), GE Healthcare, the HMS microSPECT facility, and Dr. Packard. This project is supported by a grant from the Children's Brain Tumor Foundation on which Dr. Packard is a co-investigator.

  4. Synthesis and In Vivo Characterization of a Novel 18F-labeled Lipophilic Cation for the PET Measurement of Myocardial Perfusion.

    This is a pilot project to prepare an 18F-labeled analog of a cationic compound that is already known to accumulate in mitochondria. The unlabeled version of the target compound shows several biological similarities to 99mTc-MIBI suggesting that is should be an effective marker of myocardial perfusion and may also be a substrate for Pgp, and thus an 18F-labeled marker of multidrug resistance.

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The radiopharmaceutical chemistry research program occupies two research laboratories in the Enders research building at Children's: a radiopharmaceutical chemistry laboratory and a "hot" laboratory. A separate cell-culture laboratory is also available.

The radiopharmaceutical chemistry laboratory contains four fume hoods, approximately 50 linear feet of bench space, and is set up to accommodate three postdoctoral researchers. The laboratory is equipped with various chemical instrumentation including a Bruker FTIR spectrometer, a Perkin-Elmer Lambda 40 uv-visible spectrophotometer, and a Hitachi high-performance liquid chromatograph equipped with a diode array and a gamma detector. Other smaller pieces of equipment (centrifuges, pH meters, etc.) are also available.

The hot laboratory is used for handling high levels of radioactivity and has a shielded fume hood that is equipped with a pair of Tru-Motion remote manipulator arms. This laboratory is also equipped with a semi-preparative HPLC system for purification of 18F-labeled compounds. This laboratory is scheduled for renovation in the spring of 2008. The renovation will include the addition of a hot cell suitable for the preparation of higher levels of 18F-labeled compounds than can be accommodated in the existing facility. In addition to our own basic science investigations, this laboratory is also used for the preparation of 18F-labeled compounds for use by CHB microPET users.

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