Yttrium-90 and Rhenium-188 Radiopharmaceuticals for Radionuclide Therapy

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FIG. 6.12. Stability of the radioconjugate after 24 and 48 h at room temperature. (i.e. 1 × 10 7 cells/mL) were incubated with 90 Y DOTA rituximab (5:1 ratio) for 2 h at 37°C. After incubation, the cells were washed with 1 mL of 0.05M phosphate buffer (pH7.4) and centrifuged at 2000 rev./min for 20 min at room temperature. The supernatant was aspirated and the pellet was measured for radioactivity. Inhibition studies were carried out to confirm specificity of binding by incubation of the same number of cells with 10, 50 and 100 µg of cold antibody under similar experimental conditions. Non-specific binding studies were carried out using U937 cell lines that do not express CD20 antigen on its surface. The results are presented in Fig. 6.13. (b) Equilibrium binding studies Specific binding [6.10] was measured at six different concentrations of 90 Y DOTA rituximab ranging from 0.17nM to 33.3nM to determine the equilibrium dissociation constant (K d ) by Scatchard analysis using GraphPad Prism 5 software. Two million Raji cells in 0.4 mL RPMI medium were incubated with 90 Y DOTA rituximab (0.17–33.3nM) for 2 h in a shaker at 37°C. The cells were washed twice with 0.05M phosphate buffer containing 1% bovine serum albumin, the cells were centrifuged and the supernatant was separated from the cell pellet. Both the cell pellet and supernatant were counted. Non-specific binding was measured by saturating the receptors with 25 µg of unlabelled rituximab. Specific binding was determined by subtracting the non-specific binding from the total bound counts at each concentration of the radioimmunoconjugate. A plot of the percentage specific binding on the y axis versus the concentration of the 94
FIG. 6.13. Cell binding studies with 90 Y DOTA rituximab. radioimmunoconjugate on the x axis was constructed. The concentration at 50% binding is equivalent to the K d , which was determined directly from the x axis. The data were analysed by a Scatchard plot using GraphPad Prism 5 software. The K d for 90 Y DOTA rituximab was determined to be 3.38nM, as shown in Fig. 6.14. (c) Biodistribution studies in normal Swiss mice Biodistribution studies were carried out in normal Swiss mice at 3, 24 and 48 h p.i. using ~370 kBq of 90 Y DOTA rituximab. The mice weighing 20–25 g were administered with ~370 kBq of 90 Y DOTA rituximab in 0.1 mL via the lateral tail vein. Animals were divided into three groups of four each, for each time interval studied, viz. 3, 24 and 48 h. The animals were sacrificed, blood was collected and organs dissected and weighed. The radioactivity in each organ/ tissue was measured in a flat geometry NaI(Tl) counter. Percentage doses per organ were calculated for all the major organs and blood, and are as presented in Fig. 6.15. 95
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IAEA RADIOISOTOPES AND RADIOPHARMAC
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YTTRIUM-90 AND RHENIUM-188 RADIOPHA
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IAEA RADIOISOTOPES AND RADIOPHARMAC
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FOREWORD The IAEA helps to promote
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CONTENTS CHAPTER 1. INTRODUCTION ..
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7.4. Discussion ...................
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CHAPTER 12. DEVELOPMENT OF 90 Sr/ 9
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Chapter 1 INTRODUCTION 1.1. BACKGRO
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devices were designed to improve th
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etention of the antibody’s target
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Binding affinity of these derivativ
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Chapter 2 FUNDAMENTAL CONCEPTS IN R
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A special characteristic of radioph
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β particles emitted by 90 Y. Numer
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2.3.1. Exploitation of certain meta
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2.3.3. Antibodies The high specific
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cell cultures, presents one example
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Another very promising form of radi
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destructive processes within the jo
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esearch efforts, since then. Howeve
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[2.18] HAMILTON, J.G., The metaboli
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[2.52] GOLDENBERG, D.M., et al., Mu
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Chapter 3 DEVELOPMENT OF RADIOPHARM
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FIG. 3.3. Elution efficiencies for
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FIG. 3.5. Electrodeposition of yttr
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The results of the experiments of r
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TABLE 3.3. RESULTS FOR 90 Sr/ 90 Y
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FIG. 3.11. Elution yield of a 90 Sr
Page 57 and 58: According to Fig. 3.12, there is a
Page 59 and 60: eagent (Sigma). The mean recovery o
Page 61 and 62: FIG. 3.18. Variation of RCP (%) of
Page 63 and 64: (20 and 30 min) and volume of 188 R
Page 65 and 66: FIG. 3.24. Variation of labelling y
Page 67 and 68: (c) Clodronate: 20 mg of clodronate
Page 69 and 70: Chapter 4 EVALUATION OF THE 90 Sr/
Page 71 and 72: Kamadhenu consists of five main com
Page 73 and 74: Quality control of radiolabelling w
Page 75 and 76: The electrochemical deposition of 9
Page 77 and 78: FIG. 4.5. Typical pattern of the wh
Page 79 and 80: FIG. 4.6. Elution profile from the
Page 81 and 82: FIG. 4.8. CD20 recognition in Ramos
Page 83 and 84: 4.5. RECOMMENDATIONS AND FUTURE WOR
Page 85 and 86: adioiodine labelled anti-NCAM antib
Page 87 and 88: FIG. 5.1. Comparison of biodistribu
Page 89 and 90: FIG. 5.3. Three step strategy. Biot
Page 91 and 92: TABLE 5.1. THREE STEP PRETARGETING:
Page 93 and 94: 5.1.4. Therapeutic experiments with
Page 95 and 96: 5.1.4.4. Conclusion The radioiodine
Page 97 and 98: control procedure for detection of
Page 99 and 100: 6.1.3. Recovery of doped 85/89 Sr 2
Page 101 and 102: 6.2. PREPARATION AND BIOEVALUATION
Page 103 and 104: (a) (b) (c) FIG. 6.5. PD-10 column
Page 105 and 106: FIG. 6.7. SDS PAGE pattern of ritux
Page 107: FIG. 6.10. HPLC pattern of pure 90
Page 111 and 112: 6.2.1.6. Conclusion The procedure f
Page 113 and 114: FIG. 6.17. Elution profile of 90 Y
Page 115 and 116: form NADH, which, in turn, causes t
Page 117 and 118: FIG. 6.19. In vivo distribution pat
Page 119 and 120: ACKNOWLEDGEMENTS The authors of thi
Page 121 and 122: Chapter 7 DEVELOPMENT OF THERAPEUTI
Page 123 and 124: the residual breast tissue becoming
Page 125 and 126: 7.2.5.2. Automatic procedure The la
Page 127 and 128: FIG. 7.2. RCP values of 90 Y r-BHD
Page 129 and 130: FIG. 7.3. Pyrogen test shows result
Page 131 and 132: to avidin at the 1:4 avidin:r-BHD m
Page 133 and 134: [7.9] SU, F.M., GUSTAVSON, L.M., AX
Page 135 and 136: 8.1. INTRODUCTION In past years, th
Page 137 and 138: (a) FIG. 8.1. (a) Schematic illustr
Page 139 and 140: Preliminary synthesis of the biotin
Page 141 and 142: (a) (b) FIG. 8.4. (a) PEGylated and
Page 143 and 144: TABLE 8.2. BIODISTRIBUTION IN RATS
Page 145 and 146: A specific binding to avidin was ev
Page 147 and 148: [8.13] BOSCHI, A., DUATTI, A., UCCE
Page 149 and 150: 90 Y solution obtained from a 90 Sr
Page 151 and 152: From each fraction, a ~1 g aliquot
Page 153 and 154: FIG. 9.2. Relationship between 90 S
Page 155 and 156: with 188 Re obtained from the 188 W
Page 157 and 158: 9.3.2. Labelling of DPA ale DPA ale
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FIG. 9.8. TLC radiochromatogram of
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(-) 188 Re(CO) 3 (+) (-) 99m Tc(CO)
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the HSA solution containing sodium
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TABLE 9.3. RESULTS OF 99m Tc LABELL
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9.4.4. Yttrium-90 and 177 Lu labell
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FIG. 9.14. In vitro stability of 90
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(a) (b) (c) (d) (e) (f) (g) (h) (i)
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TABLE 9.8. YTTRIUM-90 CITRATE COLLO
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(a) (b) FIG. 9.17. Grain size distr
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TABLE 9.10. BIODISTRIBUTION AFTER A
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FIG. 9.19. Structure of DOTA biotin
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[9.8] WESTERA, G., GADZE, A., HORST
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Chapter 10 DEVELOPMENT, PREPARATION
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acidic pH) and the vial heated for
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10.2.2.1. Materials and methods (a)
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Using a semiquantitative method, th
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FIG. 10.3. Whole body, SPECT and ta
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TABLE 10.4. ORGAN DISTRIBUTION STUD
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was assessed by measuring the relea
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—— Biological studies: The whol
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or liver) (see Fig. 10.7). The resu
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(b) Results and discussion Healthy
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and the pellet (particles of HA lab
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FIG. 10.11. Organ distribution stud
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The procedure was as follows: —
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TABLE 10.5. INFLUENCE OF CHEMICAL I
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analysed using ICP OES was within t
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suggested for separation of pure 86
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adionuclidic purity of the 90 Y sol
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FIG. 10.16. (a) Strontium-90/yttriu
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[10.5] DJOKIĆ, D.J., JANKOVIĆ, D.
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Yttrium-90 is one of the radionucli
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(a) (b) (c) The generator was prepa
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—— Development of EPC: The EPC
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FIG. 11.4. Elution curve of 90 Sr e
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11.4. YTTRIUM-90 MAbs The use of th
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FIG. 11.6. RCP measured using ITLC
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FIG. 11.9. Biodistribution of 90 Y
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11.5. YTTRIUM-90 EDTMP Bone metasta
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FIG. 11.14. Electrophoresis of 90 Y
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FIG. 11.15. Particle size distribut
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11.7. CONCLUSION During this CRP, a
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Chapter 12 DEVELOPMENT OF 90 Sr/ 90
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12.1.1.4. Acid vapour trap and radi
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12.1.8. Yttrium-90 peptide labellin
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(a) FIG. 12.3. Yttrium-90 elution p
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FIG. 12.6. HPLC of 90 Y DOTATATE. 1
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Chapter 13 BIFUNCTIONAL BISPHOSPHON
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latter requirement [13.10]. When th
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whether the organometallic core sel
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The fate of a targeted imaging prob
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FIG. 13.7. SPECT/CT images showing
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FIG. 13.9. TLC SG analyses of [ 188
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FIG. 13.11. Stability study (toward
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Ex vivo biodistribution studies at
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was in the form of either pertechne
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FIG. 13.19. Absolute uptake of 99m
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[13.2] ZHANG, S., GANGAL, G., ULUDA
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[13.31] DE ROSALES, R.T.M., et al.,
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The activity due to 90 Sr should be
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14.3.1.2. Operation of the 90 Sr/ 9
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antibody were taken, to which 90 Y
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operation, radiopharmaceutical grad
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14.4.1.3. Operation of the stage II
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A typical EPC pattern for a 90 Y pr
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FIG. 14.10. Decay curve of carrier
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FIG. 14.12. ITLC of 90 Y rituximab.
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FIG. 14.13. Reaction scheme for lab
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TABLE 14.6. STABILITY (%) OF 90 Y D
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FIG. 14.18. Microsphere albumin siz
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[14.3] PANDEY, U., DHAMI, P.S., JAG
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naphthalene and 1.2 g of 2,5-diphen
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A-2.2. Materials The method for sep
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out using a Wallac 1411 spectromete
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A-5.3. Procedure The technique was
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Although acyclic chelators offer ma
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(b) (c) and 90 Y colloids, both ser
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CONTRIBUTORS TO DRAFTING AND REVIEW
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INDIA Allied Publishers 1 st Floor,
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A key requirement for the effective
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Yttrium-90 and Rhenium-188 Radiopharmaceuticals for Radionuclide Therapy

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