HOW TO DEFINE RESPONSE IN ANTIFUNGAL CLINICAL TRIALS?

Transcription

1 HOW TO DEFINE RESPONSE IN ANTIFUNGAL CLINICAL TRIALS? EORTC IFICG START Look for Help?

2 MORTALITYASSOCIATED WITH INVASIVE ASPERGILLOSIS Lin et al. Clin Infect Dis 2001;32: % 50 n = days

3 Survival (%) ASPERGILLOSIS: A SEVERE DISEASE IN SEVERELY ILL PATIENTS cases over 8 years 52 % Time (months) 13% Courtesy Raoul Herbrecht

4 EORTC IFICG 1.0 VORICONAZOLE VERSUS AMFOTERICIN B IN INVASIVE ASPERGILLOSIS: SURVIVAL Herbrecht et al N Engl J Med 2002; 347: Amphotericin B -> OLAT Voriconazol e -> OLAT (Days)

5 HIGH VERSUS STANDARD DOSE AMBISOME FOR INVASIVE MOULD INFECTIONS Cornely et al. Clin Infect Dis 2007; 44: AmBisome 10 mg/kg x 14 followed by 3 mg/kg/day 201 proven & probable Invasive mould infections AmBisome 3 mg/kg/day End of treatment 46% Favorable response 50% 59% Survivors 72%

6 DATA??

7 THE CLINICAL TRIAL AS GUIDANCE FOR DAILY PRACTICE PRACTICE TRIAL Wat?

8 DIFFICULTIES IN THE ASSESSMENT OF TREATMENT OF INVASIVE FUNGAL DISEASE Clinical practice Clinical trials Statistics WEAK SPOTS

9 DIFFICULTIES IN THE ASSESSMENT OF TREATMENT OF INVASIVE FUNGAL DISEASE Clinical practice Clinical trials Statistics WEAK SPOTS CLINICIANS DIAGNOSTICS TRIAL POPULATION WRONG STUDY DESIGN STATISTICIAN: NO UNDERSTANDING OF CLINIC CLINICIAN: NO KNOWLEDGE OF STATISTICS

10 DIFFICULTIES IN THE ASSESSMENT OF TREATMENT OF INVASIVE FUNGAL DISEASE Clinical practice Clinical trials Statistics WEAK SPOTS TRIAL POPULATION CRITERIA FOR ASSESSMENT STUDY DESIGN

11 DIFFICULTIES IN THE ASSESSMENT OF TREATMENT OF INVASIVE FUNGAL DISEASE Clinical practice Clinical trials Statistics WEAK SPOTS CLINICIAN TRIAL POPULATION STATISTICIAN TRIAL POPULATION CRITERIA FOR ASSESSMENT STUDY DESIGN

12 DIFFICULTIES IN THE ASSESSMENT OF TREATMENT OF INVASIVE FUNGAL DISEASE Clinical practice Clinical trials Statistics WEAK SPOTS CLINICIAN TRIAL POPULATION STATISTICIAN

13 CHANGING ROLE OF THE STATISTICIAN Can I be of any help?? CLINICIAN STATISTICIAN

14 No!!! You got it wrong! It is not superior or inferior It is Not non-inferior CHANGING ROLE OF THE STATISTICIAN CLINICIAN STATISTICIAN

15 CONFLICT OF SCIENCE AND CLINICAL CARE clinician trial data statistician expert

16 CLINICAL TRIAL AS PROOF OF THE PRINCIPLE TRIAL

17 DIFFICULTIES IN THE ASSESSMENT OF TREATMENT OF INVASIVE FUNGAL DISEASE Clinical practice Clinical trials Statistics WEAK SPOTS CLINICIANS TRIAL POPULATION STATISTICIAN TRIAL POPULATION CRITERIA FOR ASSESSMENT STUDY DESIGN

18 PREREQUISITES TO INTERPRETE CLINICAL TRIAL DATA TRIAL POPULATION CRITERIA FOR OUTCOME STUDY DESIGN

19 PREREQUISITES TO INTERPRETE CLINICAL TRIAL DATA TRIAL POPULATION IN- /EXCLUSION CRITERIA DEFINITION OF DISEASE CRITERIA FOR OUTCOME STUDY DESIGN

20 PREREQUISITES TO INTERPRETE CLINICAL TRIAL DATA TRIAL POPULATION IN- /EXCLUSION CRITERIA DEFINITION OF DISEASE CRITERIA FOR OUTCOME STUDY DESIGN

21 POTENTIAL IMPACT IN/EXCLUSION CRITERIA ON A TRIAL POPULATION

22 DIAGNOSIS OF A FUNGUS Invasive fungus Diagnosed ineligible 4% while in trials alive!! REPRESENTATIVE!?

23 PREREQUISITES TO INTERPRETE CLINICAL TRIAL DATA TRIAL POPULATION IN- /EXCLUSION CRITERIA DEFINITION OF DISEASE CRITERIA FOR OUTCOME STUDY DESIGN

24 PREREQUISITES TO INTERPRETE CLINICAL TRIAL DATA TRIAL POPULATION IN- /EXCLUSION CRITERIA DEFINITION OF DISEASE EORTC IFICG MSG CRITERIA FOR OUTCOME STUDY DESIGN

25 PREREQUISITES TO INTERPRETE CLINICAL TRIAL DATA TRIAL POPULATION CRITERIA FOR OUTCOME STUDY DESIGN

26 PREREQUISITES TO INTERPRETE CLINICAL TRIAL DATA TRIAL POPULATION CRITERIA FOR OUTCOME STUDY DESIGN

27 SUCCESS - FAILURE PATIENT DISEASE keep alive efficacy DOCTOR DRUG THERAPY

28 JUDGEMENT OF INTERVENTION STRATEGIC TRIAL versus DRUG TRIAL PATIENT DISEASE keep alive efficacy DOCTOR DRUG THERAPY

29 PARAMETERS FOR JUDGEMENT STRATEGIC TRIAL versus DRUG TRIAL -survival -costs -quality of life or other -other parameters stable/constant -interactions -regression -toxicity, tolerance

30 JUDGEMENT OF INTERVENTION STRATEGIC TRIAL versus DRUG TRIAL DISEASE efficacy DRUG THERAPY

31 SUCCESSFUL RESPONSE CLINICAL TRIALS Segal et al. Clin Infect Dis 2008;47: in press Complete response Partial response FAILURE Stable Progression Death NON-EVALUABLE Indeterminate (conflicting data)?

32 SUCCESSFUL RESPONSE CLINICAL TRIALS Segal et al. Clin Infect Dis 2008;47: in press Complete response Partial response FAILURE Stable Progression Death NON-EVALUABLE Indeterminate (conflicting data)?

33 TRIAL PARAMETERS FOR SUCCESS *defervescence *normalization related signs & symptoms *fungus-related mortality (autopsy) *eradication/prevention of organism (few positive cultures - surrogates) *completion of therapy course *overall survival (at EOT, day 10, 30, 60, 90, 120??)

34 JUDGEMENT OF INTERVENTION STRATEGIC TRIAL versus DRUG TRIAL PATIENT keep alive DOCTOR

35 TRIAL PARAMETERS FOR SUCCESS *defervescence *normalization related signs & symptoms *fungus-related mortality *eradication/prevention of organism *completion of therapy course *overall survival (at EOT, day 10, 30, 60, 90, 120??)

36 CLINICIAN S APPRECIATION OF SUCCESS *defervescence *normalization related signs & symptoms *fungus-related mortality (autopsy) *eradication/prevention of organism (few positive cultures - surrogates) *completion of therapy course *overall survival (at EOT, day 10, 30, 60, 90, 120??)

37 CLINICIAN S APPRECIATION OF SUCCESS *defervescence *MORBIDITY *fungus-related mortality *eradication/prevention of organism *completion of therapy course *MORTALITY (at EOT, day 10, 30, 60, 90, 120??)

38 PREREQUISITES TO INTERPRETE CLINICAL TRIAL DATA TRIAL POPULATION CRITERIA FOR OUTCOME STUDY DESIGN

39 PREREQUISITES TO INTERPRETE CLINICAL TRIAL DATA TRIAL POPULATION CRITERIA FOR OUTCOME STUDY DESIGN

40 MAIN MOTIVATION FOR TRIALS effectiviness / safety of a strategy community ORGANISMS -- CLINICAL SYNDROMES industry effectiviness / safety of a new drug (vs established one)

41 STRATEGIC TRIAL as a DRUG-EFFICACY TRIAL

42 POSACONAZOLE vs AZOLES AS PROPHYLAXIS IN MYELOID MALIGNANCIES Cornely et al. N Engl J Med 2007; 356: Randomized; AML, MDS 12 weeks AZOLES 400 mg/day iv/po n = 298 POSACONAZOLE 200 mg/day tid n = 304 INVASIVE FUNGUS ASPERGILLOSIS FATAL FUNGUS OVERALL MORTALITY SERIOUS ADVERSE EVENTS 8% 7% 5% 22% 2% 2% 1% 2% 16% 6%

43 start start PUTATIVE ANTIFUNGAL STRATEGY PROPHYLAXIS EMPIRICAL (PRE-EMPTIVE) THERAPY P E T DIAGNOSTICS ULLMANN CORNELY REPORTS P E T DIAGNOSTICS End of treatment episode End of treatment Aspergillosis Fungal death Overall mortality

44 DEATH AS A PARAMETER OF OUTCOME DEATH AND SURVIVAL DEPEND ON TREATMENT UNDERLYING DISEASE TREATMENT OF COMPLICATIONS INCLUDING INFECTIONS SURVIVAL OF INFECTIONS DEPENDS ON EARLY DIAGNOSIS TIMELY INTERVENTION SELECTION OF ADEQUATE ANTI-INFECTIVES DEATH AND SURVIVAL ARE ENDPOINTS OF A COMPLETE STRATEGY DURING THE RISK EPISODE

45 start start POSACONAZOLE ASPERGILLOSIS PROPHYLAXIS STUDIES (2) Cornely et al - Ullmann et al. N Engl J Med 2007 ULLMANN CORNELY STUDIES POSA?E??T??DIAGNOSTICS? End of treatment Aspergillosis Fungal death Overall mortality FLU?E??T??DIAGNOSTICS? End of treatment Aspergillosis Fungal death Overall mortality

46 start start POSACONAZOLE ASPERGILLOSIS PROPHYLAXIS STUDIES (3) Cornely et al - Ullmann et al. N Engl J Med 2007 ULLMANN CORNELY AS DRUG STUDIES treatment POSA fixed diagnostics End of treatment Aspergillosis Fungal death Overall mortality FLU treatment fixed diagnostics End of treatment Aspergillosis Fungal death Overall mortality

47 start start POSACONAZOLE ASPERGILLOSIS PROPHYLAXIS STUDIES (4) Cornely et al - Ullmann et al. N Engl J Med 2007 ULLMANN CORNELY AS STRATEGIC STUDIES POSA protocol dictated start of treatment fixed diagnostics End of treatment Aspergillosis Fungal death Overall mortality NO DRUG start treatment at perceived need fixed diagnostics End of treatment Aspergillosis Fungal death Overall mortality

48 STRATEGIC TRIAL as a DRUG-EFFICACY TRIAL Use of empirical and prophylactic trials to assess drug efficacy

49 PROPHYLAXIS EMPIRICAL THERAPY invasive aspergillosis POSA CONAZOLE NOT PRESENT invasive CASPO FUNGIN fungal aspergillosis - LIPOSOMAL NOT EXCLUDED AMPHO B invasive VORI- CONAZOLE aspergillosis

50 WHAT? The best choice is always the most effective agent against a given pathogen -independent of strategy (prophylaxis, empirical, etc) -selection may be influenced by inconveniences (formulation, tolerance, interactions, price)

51 POSACONAZOLE RESULTS FIRST LINE TREATMENT ASPERGILLOSIS

52 response 40% SALVAGE FOR INVASIVE ASPERGILLOSIS Refractory / intolerant amphotericin B posaconazole n=107 ampho B lipid complex caspofungin n=146 totocidafun n=xxx 40% 40% 40%

53 KEY POINTS IN THE ASSESSMENT OF RESCUE STUDIES entry criteria course of underlying disease concurrent medication carry-over effect previous antifungals

54 KEY POINTS IN THE ASSESSMENT OF RESCUE STUDIES entry criteria course of underlying disease concurrent medication carry-over effect previous antifungals

55 WEAK SPOTS OF SALVAGE TRIALS IN INVASIVE FUNGAL DISEASE Clinic REFRACTORY TO OR INTOLERANT OF Statistics MIXED POPULATION WITH: Subjective entry criteria Less sick patients with oral compounds Carry-over effect of previous antifungals

56 CASES FOR RESCUE? INTOLERANT: OBJECTIVELY VERIFIABLE ORGAN TOXICITY organ disfunction, drug-related fever, exanthema SUBJECTIVE INTOLERABILITY nausea, vomiting, chills, malaise (>5 days) REFRACTORY : NO RESPONSE, STABLE PROGRESSION LOW GRANULOCYTE COUNT INCREASING GRANULOCYTE COUNT

57 FAILURES? toxicity INTOLERANT: potassium OBJECTIVELY VERIFIABLE ORGAN TOXICITY organ disfunction, drug-related fever, exanthema SUBJECTIVE INTOLERABILITY creatinine increase nausea, vomiting, chills, malaise (>5 days) a single shiver levels hyperpyrexia REFRACTORY : intolerance NO RESPONSE, STABLE PROGRESSION LOW GRANULOCYTE COUNT INCREASING GRANULOCYTE COUNT renal failure

58 CASES FOR RESCUE? INTOLERANT: OBJECTIVELY VERIFIABLE ORGAN TOXICITY organ disfunction, drug-related fever, exanthema SUBJECTIVE INTOLERABILITY nausea, vomiting, chills, malaise (>5 days) REFRACTORY : NO RESPONSE, STABLE PROGRESSION LOW GRANULOCYTE COUNT INCREASING GRANULOCYTE COUNT

59 CASES FOR RESCUE? INTOLERANT: OBJECTIVELY VERIFIABLE ORGAN TOXICITY organ disfunction, drug-related fever, exanthema SUBJECTIVE INTOLERABILITY 3 days stable nausea, vomiting, chills, malaise (>5 days) REFRACTORY : treatment NO RESPONSE, STABLE refractory PROGRESSION LOW GRANULOCYTE COUNT INCREASING GRANULOCYTE COUNT life-threatening progression

60 Number of lesions EVOLUTION OF CT-LESIONS DUE TO PULMONARY pauze-2aspergillosis Brodoefel et al. Am J Radiol 2006; 187: Size of lesions in cm days

61 LUNGLESIONS vs GALACTOMANNAN AS PARAMETERS FOR INVASIVE ASPERGILLOSIS Micelli et al. Cancer2007; 110: patients recovering from neutropenia no change antifungals 19 galactomannan normalization 16 recovery 3 unrelated death

62 COURSE OF b-d-glucan TO MONITOR THERAPY OF INVASIVE FUNGAL INFECTIONS Senn et al. Clin Infect Dis 2008;46: patients treated for acute leukemia 190 neutropenic episodes b-d-glucan pg/ml Response No response Time after onset of fever

63 KEY POINTS IN THE ASSESSMENT OF RESCUE STUDIES entry criteria course of underlying disease concurrent medication carry-over effect previous antifungals

64 Survival (%) Courtesy Raoul Herbrecht MULTIVARIATE ANALYSIS PROGNOSIS FACTORS IN 223 PATIENTS Non-progressive cancer: 58% Progressive cancer: 19% Time (weeks)

65 response CONSIDERATIONS ON THE EXPLORATION OF COMBINATION THERAPY diagnosis neutrophils // cellular immunity 3 months

66 response CONSIDERATIONS ON THE EVALUATION OF A GIVEN DRUG drug a drug b neutrophils // cellular immunity diagnosis 3 months

67 response CONSIDERATIONS ON THE EVALUATION OF A GIVEN DRUG drug a neutrophils // cellular immunity diagnosis 3 months

68 CORDYCEPS UNITARIUS

69 response MORE MONEY THAN SENSE? drug a drug c drug b neutrophils // cellular immunity diagnosis 3 months

70 KEY POINTS IN THE ASSESSMENT OF RESCUE STUDIES entry criteria course of underlying disease concurrent medication carry-over effect previous antifungals

71 CORTICOSTEROIDS AND SURVIVAL OF ASPERGILLOSIS IN HSCT Cordonnier et al. Clin Infect Dis 2006;42: S U R V I V A L low dose corticosteroids high dose weeks 51 patients with aspergillosis 41 allo HSCT 10 auto

72 KEY POINTS IN THE ASSESSMENT OF RESCUE STUDIES entry criteria course of underlying disease concurrent medication carry-over effect previous antifungals

73 THE TRUE MERITS OF A SALVAGE THERAPY DRUG B DRUG A

74 SALVAGE A salvage study is, as per definition, a strategy study and NOT suited for assessment of drug efficacy

75 FATE OF MANY A CLINICAL TRIAL

76 LIFE IS FULL OF DIFFICULT CHOICES Paper or plastic?