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Table 1 Overview of the research questions and setup of the subsequent studies

From: Peptide receptor radionuclide therapy (PRRT) with [177Lu-DOTA0,Tyr3]octreotate in combination with RAD001 treatment: further investigations on tumor metastasis and response in the rat pancreatic CA20948 tumor model

Research question (rat strain)

Study

Groups

Number

177Lu-TATE (MBq)

RAD001 (dose, period)

(A) Potential synergistic effect of RAD001 in combination with 177Lu-TATE (LEW/HanHsd)

1

Control

7

-

Placebo

RAD only

6

-

5.0 mg/kg, 4.5 w

177Lu-TATE low dose

7

125

Placebo

177Lu-TATE high dose

7

275

Placebo

RAD + 177Lu-TATE low dose

7

125

5.0 mg/kg, 4.5 w

RAD + 177Lu-TATE high dose

7

275

5.0 mg/kg, 4.5 w

(B) Prolonged follow-up of potential development of distant metastasis (LEW/HanHsd)

2

Control

8

-

Placebo

Low-dose RAD

8

-

2.5 mg/kg, 4.5 w

High-dose RAD

8

-

5.0 mg/kg, 4.5 w

177Lu-TATE

7

125

Placebo

177Lu-TATE + low-dose RAD

8

125

2.5 mg/kg, 4.5 w

177Lu-TATE + high-dose RAD

7

125

5.0 mg/kg, 4.5 w

(C) Influence of RAD001 on tumor uptake of 177Lu-DOTATATE (LEW/HanHsd)

1 + 2

177Lu-TATE

21

125 or 275

Placebo

RAD + 177Lu-TATE

29

125 or 275

2.5 mg/kg or 5.0 mg/kg, 4.5 w

(D) Effects of prolonged RAD001 treatment (LEW/SsNHsd)

3

Control

8

-

Placebo

RAD

8

-

5.0 mg/kg, 4.5 w

177Lu-TATE + RAD

8

125

5.0 mg/kg, 4.5 w

RAD prolonged treatment

8

-

5.0 mg/kg, 12 w

177Lu-TATE + RAD prolonged treatment

8

125

5.0 mg/kg, 12 w

(E) Effects of PRRT on growth of metastases (LEW/SsNHsd)

3

High-dose 177Lu-TATE after diagnosis of metastases

7

400

-

  1. 177Lu-TATE, 177Lu-DOTA0,Tyr3-octreotate; RAD, RAD001; PRRT, peptide receptor radionuclide therapy; w, weeks.