HOW TO SELECT AMONG AVAILABLE OPTIONS FOR THE TREATMENT OF ADVANCED RCC: FAVORABLE AND INTERMEDIATE RISK PATIENTS Dr. Camillo Porta S.C. di Oncologia Medica, I.R.C.C.S. Fondazione Policlinico San Matteo, Pavia Risk stratification: Motzer or Heng? (I) 1999 MSKCC (or Motzer’s) prognostic stratification system1 • low KPS (<80%), • high LDH levels (>1.5 x ULN), • low Hb levels, • high corrected Ca++ (>10 mg/dL) and • the absence of previous nephrectomy 2000 MSKCC (or Motzer’s) prognostic stratification system2 • low KPS (<80%), • high LDH levels (>1.5 x ULN), • low Hb levels, • high corrected Ca++ (>10 mg/dL) and • time from diagnosis to treatment < 1 year 1Motzer RJ, et al. J Clin Oncol 1999; et al. J Clin Oncol 2000 2Motzer RJ, Risk stratification: Motzer or Heng? (II) 2009 Heng’s prognostic stratification system1 • low KPS (<80%), • low Hb levels, • time from diagnosis to treatment < 1 year • high Ca++ levels • high platelet count • high neutrophil count 0 risk factors – favorable risk 1-2 risk factors – intermediate risk 3-6 risk factors – poor risk 1Heng DY, et al. J Clin Oncol 2009 My choice is … Keep it simple, folks!!! 2012 ESMO Guidelines Escudier B, et al. Ann Oncol 2012 Standard 1st-line treatment options Motzer RJ, et al. N Engl J Med 2007; Escudier B, et al. Lancet 2007; Sternberg CN, et al. J Clin Oncol 2010 Why differences in the levels of evidence? Sunitinib – right comparator, good study design, primary end-point met Bevacizumab + Interferon-a – ideal comparator (+ placebo), reasonable study design, primary end-point NOT met Pazopanib – criticizable study design (placebo-controlled, mix of Tx-naïve and pretreated pts), primary end-point met Escudier B, et al. Ann Oncol 2012 Any other option? High-dose i.v. IL_2 Rosenberg SA, et al. Ann Surg 1998 Escudier B, et al. Ann Oncol 2012 And, what about Sorafenib? Sorafenib registrative study1 was performed in a 2nd-line setting (mainly in patients refractory to cytokines), but its label, at least in the EU, allows the treatment also of patients unsuitable for cytokines, leaving open the opportunity of using it 1st-line Despite this, a randomized phase II study of Sorafenib or Interferon in 1stline failed to demonstrate any PFS benefit for Sorafenib over Interferon2 1Escudier 2Escudier B, et al. N Engl J Med 2007; B, et al. J Clin Oncol 2009 Furthermore, … 12 PFS 10 PFS (months) 7.5 8 8.1 6 6.2 5.7 7.4 9.0 9.1 6.9 4 2 0 2005 2006 2007 2008 2009 2010 2011 Year that data were first presented 2012 2013 Adapted from the slide presented by Professor Tim Eisen at ASCO 2012 to show only first-line data; to show data according to time of first presentation, rather than final publication (hence variation between publication year and year on graph); and to indicate how many patients were included in the sorafenib arm/analysis (using bubble size) Motzer RJ, et al. ASCO 2012; Rini B, et al. Cancer 2012; Stadler WM, et al. Cancer 2010; Bellmunt J, et al. Clin Transl Oncol 2010; Jonasch E, et al. Cancer 2010; Procopio G, et al. Br J Cancer 2011; Beck J, et al. ECCO 2007; Escudier B, et al. J Clin Oncol 2009. Now, let’s try to address an embarassing question … Should we move from Sunitinib to Pazopanib? • The ‘PISCES’ trial1 showed that: – Pazopanib is preferred by patients over Sunitinib – Pazopanib is better tolerated and induces less AEs • The ‘COMPARZ’ trial2 showed that: – Pazopanib is not inferior as compared to Sunitinib in terms of efficacy – Pazopanib is able to induce higher objective response rates as compared to Sunitinib 1. Escudier B, et al. J Clin Oncol 2012; 2. Motzer RJ, et al. ESMO 2012 (Presidential Symposium II) Let’s go for bugs in the ‘PISCES’ trial … ‘PISCES’: patients’ preference trial of Pazopanib vs Sunitinib R Period 1 Period 2 Pazopanib 800 mg OD Sunitinib 50 mg 4/2a Patient preference of further treatment 1:1 n = 169 Pazopanib 800 mg OD Sunitinib 50 mg 4/2a 10 weeks 0 2-week 10 weeks washout Double-blind phase 12 10 Time (weeks) End of study 22 Stratification factors: • ECOG PS (0 vs 1) • metastatic sites (1 vs ≥ 2) a4 weeks on treatment → 2 weeks matching placebo → 4 weeks on treatment Escudier B, et al. J Clin Oncol 2012;30(suppl.):abs. CRA4502 ‘PISCES’: patients’ preference trial of Pazopanib vs Sunitinib R Period 1 Period 2 Pazopanib 800 mg OD Sunitinib 50 mg 4/2a Patient preference of further treatment 1:1 n = 169 Pazopanib 800 mg OD Sunitinib 50 mg 4/2a 10 weeks 0 2-week 10 weeks washout Double-blind phase 12 10 Time (weeks) End of study 22 Stratification factors: • ECOG PS (0 vs 1) • metastatic sites (1 vs ≥ 2) a4 weeks on treatment → 2 weeks matching placebo → 4 weeks on treatment Escudier B, et al. J Clin Oncol 2012;30(suppl.):abs. CRA4502 1. The lenght of the observation period n Median PFS, months (95% CI) HR P Tivozanib 181 12.7 (9.1–15.0) 0.756 0.037 Sorafenib 181 9.1 (7.3–10.8) Motzer RJ, et al. J Clin Oncol 2012 Furthermore, we know that … (1) New occurrence of AE (%)* 35 Sorafenib 30 Hypertension 25 Fatigue Diarrhoea 20 HFSR 15 10 5 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Cycle *Percentage of new events occurring in a particular cycle Hutson TE, et al. Eur J Cancer 2010 Furthermore, we know that … (2) Sunitinib (EAP) <6 months of sunitinib treatment (n=1,696) ≥6 months of sunitinib treatment (n=1,264) Adverse event 217 (13) 77 (6) Consent withdrawn 115 (7) 114 (9) Lack of efficacy 570 (34) 540 (43) Death 487 (29) 188 (15) Other* 307 (18) 345 (27) Reason for discontinuation, n (%) *Includes protocol violation, lost to follow-up, laboratory abnormality(ies), sponsor decision, not meeting entrance criteria, and missing patients Porta C, et al. ASCO 2008 Furthermore, we know that … (2) Sunitinib (EAP) <6 months of sunitinib treatment (n=1,696) ≥6 months of sunitinib treatment (n=1,264) Adverse event 217 (13) 77 (6) Consent withdrawn 115 (7) 114 (9) Lack of efficacy 570 (34) 540 (43) Death 487 (29) 188 (15) Other* 307 (18) 345 (27) Reason for discontinuation, n (%) *Includes protocol violation, lost to follow-up, laboratory abnormality(ies), sponsor decision, not meeting entrance criteria, and missing patients Porta C, et al. ASCO 2008 2. The timing of QoL assessment (I) • Timing of assessment of patients’ preference clearly unfavoured Sunitinib [in both the ‘PISCES’1 and COMPARZ’2 trial] • Indeed, end of week 22 = Day 28 (i.e., the worst possible in terms of toxicity) in a typical Sunitinib cycle3 1Schmidinger M, 2Eisen ESMO 2012 GU Posters Discussion; T, ESMO 2012 Presidential Symposium II Discussion; 3Cella D, et al. Ann Oncol 2012 2. The timing of QoL assessment (II) • Two recent analyses1,2 examined the impact of Sunitinib dosing schedule on measurement of patient-reported fatigue and HRQoL Fatigue – Compared with baseline, patients reported worse fatigue during the first cycle of Sunitinib treatment; however, less fatigue was reported in all consecutive treatment cycles1 – Sunitinib Schedule 4/2 was associated with an “on–off” effect, with patients reporting more fatigue on Day 29 of each cycle following 4 weeks on treatment and less fatigue on Day 1 of each cycle following the 2-week offtreatment period1 HRQoL – Variability in patient experience of HRQoL on Day 1 compared with Day 28 for Sunitinib on Schedule 4/2 is statistically significant, and should be accounted for when collecting HRQoL data2 1Cella D, et al. J Clin Oncol 2012; 2Bushmakin A, et al. Ann Oncol 2012 3. Patients’ perception and their level of information • Were the patients informed that side-effects [at least, some of them, e.g., hypertension and HFSR] are regarded as predicitve of efficacy? How would preference then look like?1 1Schmidinger M, ESMO 2012 GU Posters Discussion Let’s go for bugs in the ‘COMPARZ’ trial … Pazopanib vs Sunitinib: the ‘COMPARZ’ trial • Locally advanced or metastatic RCC, with clear cell component histology • No prior systemic therapy • • a4 R A N D O M I n = 876 S A T I O N Primary endpoint: – PFS (non-inferiority) Secondary endpoints: – OS – ORR (objective response rate) – duration of response – safety – QoL (quality of life) Pazopanib 800 mg OD Sunitinib 50 mg 4/2a ‘COMPARZ’ trial (NCT00720941) Start date: August 2008 Recruitment: complete weeks on treatment → 2 weeks off treatment = 1 treatment cycle ‘COMPARZ’ trial: statistical design PFS non-inferiority demonstrated if upper bound of 95% CI for HR<1.25 Cox proportional hazard analysis adjusted for stratification factors By independent review 631 PFS events needed for 80% power Planned enrollment of 1100 patients* * original sample of 876 increased during study conduct to 1100 to obtain the 631 prespecified number of PFS events Motzer RJ, et al. ESMO 2012 (Presidential Symposium II) Methodology of non-inferiority studies (1) In non-inferiority studies, the non-inferiority bounds of 95% CI for HR is usually comprised between 1.15 and 1.20; for example: S9346 Study1 (ASCO 2012) – the upper bound of 95% CI for HR was 1.20 For an HR for OS = 1.09 (0.95-1.24), the study was declared as negative PHARE Study2 (ESMO 2012) – the upper bound of 95% CI for HR was 1.15 For an HR for DFS = 1.28 (1.04-1.56), the study was declared as negative 1Intermittant Androgen Deprivation vs Continuous Androgen Deprivation (prostate); 2Six months vs twelve months adjuvant Trastuzumab (breast) Methodology of non-inferiority studies (2) BOUND Non-inferiority NOT demonstrated Non-inferiority NOT demonstrated Non-inferiority NOT demonstrated Non-inferiority demonstrated 1 Favor experimental arm (Pazopanib) 1.25 Favors control arm (Sunitinib) Non-inferiority CIs in the ‘COMPARZ’ trial BOUND 1.22 0.898 1.15 1.20 1 Favor experimental arm (Pazopanib) Non-inferiority demonstrated 1.25 Favors control arm (Sunitinib) ‘COMPARZ’ trial: statistical design PFS non-inferiority demonstrated if upper bound of 95% CI for HR<1.25 Cox proportional hazard analysis adjusted for stratification factors By independent review 631 PFS events needed for 80% power Planned enrollment of 1100 patients* * original sample of 876 increased during study conduct to 1100 to obtain the 631 prespecified number of PFS events Motzer RJ, et al. ESMO 2012 (Presidential Symposium II) ‘COMPARZ’ trial: the issue of a mixed population Asian patients and Sunitinib In Asian patients, Sunitinib is less tolerated, leading to higher toxicity rates and the widespread use of reduced doses1,2; since a clear-cut relationship exists between exposure and efficacy3, an inferior activity in these patients could be expected. And indeed, Tx duration in Asia is definitely lower than in the rest of the world1,2,4 1Yoo 3Houk C, et al. Jpn J Clin Oncol 2010; 2Kim HS, et al. Eur J Cancer 2012; BE, et al. Cancer Chemother Pharmacol 2010; 4Choueiri TK, et al. Manuscript in preparation. So what? ‘PISCES’ and ‘COMPARZ’ clearly support the use of Pazopanib as a reasonable Tx option in 1st line Pazopanib safety profile is superior as compared to Sunitinib; however, Sunitinib – despite the non-inferiority results of the ‘COMPARZ’ trial – remains slightly more efficacious As Medical Oncologists and Urologist, we should be happy for the availability of different Tx options (and do not forget other drugs!) to really tailor Tx on the basis of each given patient’s needs Considering all the above Is there a reasonable Tx standard for mRCC today? Try to make simple what is complex “… Even though Physics tells us that chaos can be, and often is, a property of very simple systems, meaning that simple questions usually have complicated answers , our only way out could be found turning upside-down this concept: in a complex system (e.g., kidney cancer) we should look for an easy – and credible – answer to our doubts. And such an answer probably is Chris Ryan’s ‘simplified algorythm’ statement: “choose any agent You want. Use it well” … A shortcut, for sure, but a smart one, and also a glowing glance of simplicity to move out from the fogs of chaos”. Porta C. Eur Urol 2011 Thank You for Your kind attention!!! T c.porta@smatteo.pv.it