IRAK4 Inhibition in Treatment of COVID-19 With ARDS (I-RAMIC)

Study terminated due to lack of enrollment reflecting the decrease in number of COVID infections. There were no safety and/or efficacy concerns involved in the decision to stop enrollment.

The purpose of this study is to assess the efficacy of PF-06650833 in addition to standard-of-care compared to standard-of-care treatment alone in improving outcomes in patients with COVID-19.

Proposed is a randomized, double-blind, placebo-controlled, parallel group Phase 2 study of the efficacy and safety of PF-06650833, an investigational drug, in hospitalized adult male and female patients with SARS-CoV-2-induced ARDS who need mechanical ventilation. The primary objective of this study is to assess the efficacy of PF-06650833 in addition to standard-of-care compared to standard-of-care treatment alone in improving outcomes in patients with COVID-19, evidence of increased inflammation, and ARDS requiring mechanical ventilation or extracorporeal membrane oxygenation at time of admission. The secondary objectives of this study are to evaluate: Proportion of patients alive, extubated, and receiving no more that low flow oxygen supplementation by nasal cannula or face mask (excluding extubation for compassionate purposes in terminal patients). This would correspond to an at least 2-point improvement in the National Institute of Allergy and Infectious Diseases (NIAID) ordinal scale (1 = non hospitalized, no limitations on activity, and 8 = death) at Days 29 and 61 Proportion of patients alive, extubated, and receiving any level oxygen supplementation, including non-invasive positive pressure ventilation or high flow oxygen device (excluding extubation for compassionate purposes in terminal patients). This would correspond to an at least 1-point improvement in the NIAID ordinal scale (1 = non hospitalized, no limitations on activity, and 8 = death) at Days 29 and 61 Percentage of patients in each category of the NIAID 8-point ordinal scale of disease severity (Days 8, 15, 22, 29, and 61). The ordinal scale is an assessment of the clinical status at the first assessment of a given study day. The scale is as follows: Not hospitalized, no limitations on activities; Not hospitalized, limitation on activities and/or requiring home oxygen* Hospitalized, not requiring supplemental oxygen* - no longer requires ongoing medical care Hospitalized, not requiring supplemental oxygen* - requiring ongoing medical care (COVID-19 related or otherwise) Hospitalized, requiring supplemental oxygen*; Hospitalized, on non-invasive ventilation (NIV)** or high flow oxygen device; Hospitalized, on invasive mechanical ventilation or ECMO; Death For patients on chronic home O2 supplementation, supplemental O2 is defined as >= home O2 requirement. Use of NIV for chronic conditions [e.g. Obstructive sleep apnea (OSA)] is not applicable Mortality rate at Day 61 Time to a 1-point improvement in the NIAID 8-point ordinal scale of disease severity Time to a 2-point improvement in the NIAID 8-point ordinal scale of disease severity Change from baseline in the ordinal scale from Day 1 to Days 3, 5, 8, 11, 15, 22, and Arterial partial pressure of oxygen (PaO2) / Fractional concentration of inspired oxygen (FiO2) ratio (or P/F ratio) Change of the Sequential Organ Failure Assessment (SOFA). The SOFA evaluates 6 variables, each representing an organ system (one for the respiratory, cardiovascular, hepatic, coagulation, renal and neurological systems), and scored from 0 (normal) to 4 (high degree of dysfunction/failure). Thus, the maximum score may range from 0 to 24. Duration (days) of mechanical ventilation Ventilator free days Safety as assessed by reporting of adverse events (AEs), changes in clinical laboratory parameters (e.g., haemoglobin (Hb), white blood cell (WBC) count, platelets, hepatic transaminases, bilirubin, serum creatinine)

Subjects randomized to the PF-06650833 arm of the study will receive 200 mg IR suspension formulation every 6 hours (via nasogastric [NG] tube, orogastric [OG] tube, or equivalent) if unable to take tablets by mouth (PO). All dosing of PF-06650833 will be in addition to current hospital SOC therapy.

Subjects randomized to the PF-06650833 arm of the study will receive 200 mg IR suspension formulation every 6 hours (via nasogastric [NG] tube, orogastric [OG] tube, or equivalent) if unable to take tablets by mouth (PO). Subjects for whom concomitant administration of a strong inhibitor of cytochrome P450 (CYP) 3A4 will have the dose of the IR formulation to 200 mg once daily (QD). Subjects who can take tablets PO will receive 400 mg PF-06650833 (2-200 mg tablets) of the MR formulation QD under fasted conditions (preferably at least 4 hours after and 1.5 hours before a meal). No dose adjustment is needed for subjects taking the MR tablet preparation, except if co-administered with ritonavir in which case the dose should be reduced to 200 mg MR QD. All dosing of PF-06650833 will be in addition to current hospital SOC therapy.

Proportion of patients alive, extubated, and receiving no more than low flow oxygen supplementation by nasal cannula or face mask (excluding extubation for compassionate purposes in terminal patients). This would correspond to an at least 2 point decrease in the NIAID ordinal scale. The NIAID scale is as follows: Not hospitalized, no limitations on activities Not hospitalized, limitations on activities and/or requiring home oxygen Hospitalized, not requiring supplemental oxygen - no longer requires ongoing medical care Hospitalized, not requiring supplemental oxygen - requiring ongoing medical care (COVID-19 related or otherwise) Hospitalized, requiring supplemental oxygen Hospitalized, on non-invasive ventilation or high-flow oxygen devices Hospitalized, on invasive mechanical ventilation or ECMO Death

Proportion of patients alive, extubated, and receiving no more than low flow oxygen supplementation by nasal cannula or face mask (excluding extubation for compassionate purposes in terminal patients). This would correspond to an at least 2 point decrease in the NIAID ordinal scale (1 = not hospitalized, no limitations on activities, and 8 = death) at Day 61.

Proportion of patients alive, extubated, and receiving any level oxygen supplementation, including non-invasive positive pressure ventilation or high flow oxygen device (excluding extubation for compassionate purposes in terminal patients). This would correspond to an at least 1-point decrease in the NIAID ordinal scale (1 = not hospitalized, no limitations on activities, and 8 = death) at Day 29.

Proportion of patients alive, extubated, and receiving any level oxygen supplementation, including non-invasive positive pressure ventilation or high flow oxygen device (excluding extubation for compassionate purposes in terminal patients). This would correspond to an at least 1-point decrease in the NIAID ordinal scale (1 = not hospitalized, no limitations on activities, and 8 = death) at Day 61.

Percentage of patients in each category of the NIAID 8-point ordinal scale of disease severity at Day 8. The ordinal scale is an assessment of the clinical status at the first assessment of a given study day in which 1 = not hospitalized, no limitations on activities, and 8 = death.

Percentage of patients in each category of the NIAID 8-point ordinal scale of disease severity at Day 15. The ordinal scale is an assessment of the clinical status at the first assessment of a given study day in which 1 = not hospitalized, no limitations on activities, and 8 = death.

Percentage of patients in each category of the NIAID 8-point ordinal scale of disease severity at Day 22. The ordinal scale is an assessment of the clinical status at the first assessment of a given study day in which 1 = not hospitalized, no limitations on activities, and 8 = death.

Percentage of patients in each category of the NIAID 8-point ordinal scale of disease severity at Day 29. The ordinal scale is an assessment of the clinical status at the first assessment of a given study day in which 1 = not hospitalized, no limitations on activities, and 8 = death.

Percentage of patients in each category of the NIAID 8-point ordinal scale of disease severity at Day 61. The ordinal scale is an assessment of the clinical status at the first assessment of a given study day in which 1 = not hospitalized, no limitations on activities, and 8 = death.

Time to a 1-point decrease in the NIAID 8-point ordinal scale of disease severity (1 = not hospitalized, no limitations on activities, and 8 = death).

The SOFA evaluates 6 variables, each representing an organ system (one for the respiratory, cardiovascular, hepatic, coagulation, renal and neurological systems), and scored from 0 (normal) to 4 (high degree of dysfunction/failure). Thus, the maximum score may range from 0 to 24.

INCLUSION CRITERIA Adult male and female patients, including women of childbearing potential, at least 18 years of age, inclusive Participant (or legally authorized representative) capable of giving signed informed consent Laboratory-confirmed novel coronavirus (SARS-CoV-2) infection Clinical findings and an imaging study consistent with ARDS; PaO2 / FiO2 ratio < 300; A requirement for mechanical ventilation ≤ 48 hours prior to enrollment. Evidence of increased inflammation as assessed by hsCRP > ULN AND at least ONE of the following being > upper limit of normal (as available): ferritin procalcitonin D-dimer fibrinogen LDH PT/PTT EXCLUSION CRITERIA Suspected or known active systemic bacterial, viral (except SARS-CoV2 infection), or fungal infections Active herpes zoster infection Known active or latent tuberculosis (TB) or history of inadequately treated TB Active hepatitis B or hepatitis C Known history of human immunodeficiency virus (HIV) infection with a detectable viral load or CD4 count < 500 cells / mm3 (patients for whom documented viral load or CD4 counts are available will be excluded) Active hematologic cancer Metastatic or intractable cancer Pre-existing neurodegenerative disease Severe hepatic impairment defined as Child-Pugh Class B or Class C at baseline Severe renal impairment with an estimated glomerular filtration rate (eGFR) < 45 mL/min/1.73 m2 Severe anemia (Hb < 8.0 g/dL) Any of the following abnormal laboratory values: absolute lymphocyte count <250 cells/mm3 absolute neutrophil Count (ANC) <1000 cells/mm3 Platelet count <50,000 cells/mm3 ALT or AST > 5X ULN, or other evidence of hepatocellular synthetic dysfunction or total bilirubin > 2X ULN Any other medical condition or laboratory abnormality that may increase the risk of study participation or, in the investigator's judgment, make the participant inappropriate for the study Prohibited concomitant therapy (see section 1.12.7.2) Pregnancy (a negative urine or serum pregnancy test is required for inclusion) Immunocompromised patients, patients with known immunodeficiencies or taking potent immunosuppressive agents (e.g., azathioprine, cyclosporine) Anticipated survival < 72 hours as assessed by the Investigator. Participation in other clinical trials of investigational treatments for COVID-19 Known history of nephrolithiasis