SCIL-1Ra in COVID-19 Feasibility & PK/PD (SCIL_COV19)

Subcutaneous and Intravenous IL-1Ra (Anakinra) in COVID-19 Infection - Feasibility & Pharmacokinetics/Pharmacodynamics Study

The current COVID-19 pandemic is a worldwide healthcare crisis. Of concern is the large number of patients that are/will require mechanical ventilation, and the associated strain that this will place on healthcare resources. At present, there are no specific therapeutic interventions directed at COVID-19 infection. However, observational data suggest that there is a subgroup of patients that demonstrate a hyperinflammatory response in response to COVID-19 and have a higher requirement for Critical Care and higher mortality. There is a strong case for the use of the naturally occurring anti-inflammatory cytokine interleukin-1 receptor antagonist (IL-1Ra) in these patients. Anakinra is a recombinant form of IL-1Ra that is licensed for clinical use. Success of use of anakinra in COVID-19 trials will be greatly enhanced by robust scientific evidence and established pharmacokinetics which inform the most effective dosing regimens. The latter is especially important when, as in the case of anakinra, drug supplies are limited, the drug has short half-life and clinical ease of application is critical.

The investigators plan a small trial of an existing drug in patients with COVID-19 at Salford Royal NHS Foundation Trust (SRFT) and Manchester Foundation Trust (MFT). The investigators will recruit patients with suspected or confirmed COVID-19 infection within 24 hours of being transfer in a Critical Care department. The investigators have been testing interleukin-1 receptor antagonist: IL-1Ra (known as Anakinra) for many years. Marketed as a treatment for rheumatoid arthritis and for some rare autoimmune diseases, we have shown Anakinra also reduces or blocks inflammation in a number of other conditions e.g. stroke and brain haemorrhage. The investigators have found it to be safe, easily administered and well tolerated. As part of the global response to the SARS-COV-2 pandemic, researchers have identified drugs that repurposing existing drugs. Anakinra has been proposed as a candidate therapy for COVID-19 and will be used in REMAP-CAP clinical trial as an intravenous (IV) therapy four times daily (qds). Whilst there is uncertainty about the therapeutic benefits, the investigators wish to explore the theory that they can achieve comparable concentrations in the blood using a subcutaneous (SC) injection twice daily (bd), as observed with IV therapy qds. We will randomise up to 40 patients to receive either SC Anakinra twice daily or IV Anakinra four-times daily for 14 days (or until discharge from CCU). They will measure changes in biomarkers in both groups and use the data to inform a mathematical model to simulate the effect the drug may have on the body. The aim is to the provide evidence that a lower dose SC Anakinra is as effective as higher dose IV.

Patients will be randomly assigned to one of two arms:- Subcutaneous arm: 100mg anakinra SC will be administered subcutaneously at consistent times that are convenient and practical for the patients and research/nursing staff providing there is a minimum 8 hours and maximum 16 hours between administrations. Intravenous arm: 100mg anakinra in 100mL 0.9% NaCl will be administered intravenously four times a day every 6 hours.

100mg anakinra SC will be administered subcutaneously at consistent times that are convenient and practical for the patients and research/nursing staff providing there is a minimum 8 hours and maximum 16 hours between administrations.

100 mg interleukin-1 receptor antagonist (r-meth-Hu-IL-1Ra), anakinra; marketed as Kineret® in 0.67 mL prefilled syringe for single use

Plasma IL-1Ra levels from Day 1 to Day 7 following administration of SC anakinra in patients with SARS-CoV-2

Plasma IL-6 levels from Day 1 to Day 7 following administration of SC anakinra in patients with SARS-CoV-2

Safety endpoints include: a. Severe fatal or life-threatening serious adverse reactions (duration of IMP plus 30h from last dose).

Safety endpoints include: b. Anaphylactic/anaphylactoid reactions (duration of IMP plus 30h from last dose).

Feasibility endpoints include protocol deviations in terms of timing and delivery of scheduled medication.

Exploratory data on clinical efficacy as defined by: a. Time to recovery defined by hospital discharge or improvement of two points on the ordinal scale: not hospitalised; hospitalised without need for supplemental oxygen; requiring supplemental oxygen; requiring HFNC or non-invasive mechanical ventilation; requiring ECMO or mechanical intervention; dead. Improvement mechanical ventilation (from recruitment to time of ventilation)

Exploratory data on clinical efficacy as defined by: c. Status on the above ordinal scale (at 14 and 28 days)

Inclusion Criteria: Patient age 18 or above. Clinically suspected/proven COVID-19. Requiring organ support with one or more of: Non-invasive or invasive ventilatory support Receiving infusion of vasopressor or inotropes or both. No concomitant health problems that, in the opinion of the PI or designee in agreement with the treating clinician, would interfere with participation, administration of study drug or assessment of outcomes including safety. Exclusion Criteria: More than 24h has elapsed since CCU admission. Death is deemed to be imminent and inevitable during the next 24h. One or more of: the patient, substitute decision-maker or the attending physician are not committed to full active treatment. Known condition resulting in ongoing immunosuppression including neutropenia (count < 1.5 x 10^9/L) prior to hospitalisation, malignancy, latent tuberculosis or chronic liver disease (if known). Previous or current treatment with anakinra or medication suspected of interacting with anakinra, listed in the drug SmPC, known at the time of trial entry or previous participation in this trial. Known to have received active treatment in a clinical trial of an investigational immunomodulatory agent (not including corticosteroids) within 30 days prior to study entry. Known to be pregnant or breast feeding or inability to reliably confirm that the patient is not pregnant. Known allergy to anakinra or any of the excipients listed in the drug SmPC Known allergy to other products that are produced by DNA technology using the micro-organism E. coli (e.g. Escherichia coli derived protein).