To facilitate clinical scintigraphic imaging, stable chelation of 99mTc may be achieved by incorporation of a DPK-bearing comonomer into the HPMA backbone. Electronegative and neutral 99mTc-labeled HPMA copolymers of 7, 21, and 70 kDa show significant variation in organ biodistribution in SCID mice. 99mTc-labeled HPMA copolymers could be used as diagnostic agents and to study pharmacokinetics of delivery systems based on these copolymers.
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