A Phase I Single Ascending Dose Study of the Intravitreal Plasma Kallikrein Inhibitor KVD001 in Subjects With DME

Inclusion Criteria: 1. Male or female adult subjects 18 years of age and older 2. Confirmed diagnosis of Type I or Type II diabetes mellitus 3. Best corrected visual acuity, using Early Treatment Diabetic Retinopathy Study (ETDRS) electronic visual acuity (EVA) testing, of between 20/40 and 20/400 (Snellen equivalent) in the study eye 4. Fellow eye acuity 20/80 or better measured as above with no expectation of requirement for anti-VEGF treatment in fellow eye within 2 months of study drug administration 5. Presence of central involved DME in the study eye defined as Optical Coherence Tomography (OCT) Central Subfold Thickness (CST) ≥305 µm in women and ≥320 µm in men in the study eye 6. Subjects who fulfil one of the following criteria: 1. Subjects who have not previously received an anti-VEGF treatment and who, in the view of the Investigator, can have initiation of anti-VEGF treatment in the study eye deferred for at least 2 months following the date of anticipated study drug administration 2. Subjects who are receiving regular anti-VEGF intravitreal injections who: * Have received at least 3 intravitreal injections of an anti-VEGF treatment within the last 5 months (study drug administration will be at least 6 weeks after the most recent intravitreal administration of anti-VEGF) and * In the view of the Investigator, can have continuation of anti-VEGF treatment in the study eye deferred for at least 2 months following the date of anticipated study drug administration 3. Subjects who have received anti-VEGF in the past (\>3 months prior to study inclusion) but are not actively receiving treatment and who in the view of the Investigator, can have resumption of anti-VEGF or alternative treatment in the study eye deferred for at least 2 months following anticipated study drug administration 7. Subjects, who in the view of the Investigator, are not expected to require panretinal laser photocoagulation or intravitreal steroids or intraocular surgery in the study eye for at least 2 months following anticipated study drug administration 8. No prior treatment with panretinal photocoagulation or intravitreal steroid in the study eye within the previous 3 months 9. No prior treatment with systemic corticosteroids or systemic anti-VEGF therapy within the previous 3 months 10. Study participant voluntarily agrees to participate in this study and signs the Institutional Review Board (IRB) approved informed consent prior to performing any procedure Exclusion Criteria: 1. Females who are pregnant or lactating, or expecting to become pregnant during the course of the study 2. Poorly controlled diabetes mellitus 3. Uncontrolled hypertension 4. Significant co-existing disease 5. Participation in an investigational intervention clinical study within 2 months prior to study inclusion 6. History of alcohol and/or drug abuse in the last 2 years 7. Men not willing to use appropriate birth control methods 8. Media clarity or pupillary dilation inadequate to obtain reasonable quality OCT and/or fundus image 9. Subjects employed by the Sponsor or in any relationship of dependence with the Sponsor and/or Investigator