Some patients in our trials have experienced serious adverse events. In the Phase 3 MDS Trial, serious adverse events, regardless of causality, reported for more than one patient as of July 31, 2020 were: febrile neutropenia (26%), pneumonia (10%), pyrexia (9%), sepsis (6%), muscle weakness (5%), confusional state (3%), respiratory failure (3%), cellulitis (2%), acute febrile neutrophilic dermatosis (1%), acute kidney injury (1%), acute respiratory distress syndrome (1%), anemia (1%), atrial flutter (1%), cardiac failure (1%), dyspnea (1%), encephalopathy (1%), fall (1%), headache (1%), hypotension (1%), hypoxia (1%), pericarditis (1%), platelet count decreased (1%), pneumonitis (1%), skin infection (1%), thrombocytopenia (1%), and urinary tract infection (1%). In the U.S. Phase 1b/2 MDS/AML Trial, serious adverse events, regardless of causality, reported for more than one patient as of July 31, 2020 were: febrile neutropenia (33%), pneumonia (25%), sepsis (11%), pyrexia (7%), dehydration (5%), embolism (5%), muscle weakness (5%), respiratory failure (5%), vomiting (5%), angina pectoris (4%), atrial fibrillation (4%), intracranial hemorrhage (4%) and multiple organ dysfunction syndrome (4%). In the French Phase 1b/2 MDS/AML Trial, serious adverse events, regardless of causality, reported for more than one patient as of July 31, 2020 were: febrile neutropenia (27%), device related infection (12%), pneumonia (8%), sepsis (8%), corona virus infection (6%), lung disorder (6%), ataxia (4%), cellulitis (4%), dizziness (4%), septic shock (4%), subdural hematoma (4%) and urinary tract infection (4%). In the Phase 2 MDS/AML post-transplant trial, serious adverse events, regardless of causality, reported for more than one patient as of July 31, 2020 were confusional state (9%) and pyrexia (9%). In the Phase 1 AML Trial, serious adverse events, regardless of causality, reported for more than one patient as of July 31, 2020 were: febrile neutropenia (40%), sepsis (13%) and subdural hematoma (13%). In the Phase 1b/2 Clinical Trial of APR 246 in Platinum Sensitive Ovarian Cancer (PiSARRO), serious adverse events, regardless of causality, reported in more than one patient were: device related infection (17%), vomiting (17%), febrile neutropenia (8%), infection (6%), small intestinal obstruction (6%) and thrombocytopenia (6%).
Some patients have died during their participation in the clinical trials for APR-246; there have been two deaths reported by an investigator as possibly related to both APR-246 and azacitidine, one death reported by an investigator as possibly related to APR-246 and four deaths reported by an investigator as possibly related to azacitidine. We believe that the deaths with any relation to APR-246 may have been caused by the underlying disease, other comorbidities from which such patient was suffering or the other co-administered treatments. Any deaths occurring in our clinical trials, whether related to our product candidate or not, could affect perceptions relating to our product candidate.
If any of our product candidates are associated with adverse events or undesirable side effects or have properties that are unexpected, our trials could be suspended or terminated and the FDA or comparable foreign regulatory authorities could order us to cease further development of or deny approval of our product candidates for any or all targeted indications. We, or any future collaborators, may abandon development or limit development of that product candidate to certain uses or subpopulations in which the undesirable side effects or other characteristics are less prevalent, less severe or more acceptable from a risk-benefit perspective. Drug-related side effects could affect patient recruitment or the ability of enrolled patients to complete the trial or result in potential product liability claims. Any of these occurrences may harm our business, results of operations, financial condition and prospects significantly.
The outcome of preclinical testing and early clinical trials may not be predictive of the success of later clinical trials, interim results of a clinical trial do not necessarily predict final results, and the results of our clinical trials may not satisfy the requirements of the FDA or comparable foreign regulatory authorities.
We currently have no drugs approved for sale and we cannot guarantee that we will ever have marketable drugs. Clinical failure can occur at any stage of clinical development. Clinical trials may produce negative or inconclusive results, and we or any future collaborators may decide, or regulators may require us, to conduct additional clinical trials or preclinical studies. We will be required to demonstrate with substantial evidence through adequate and well-controlled clinical trials that our product candidates are safe and effective for use in treating specific conditions in order to obtain marketing approvals for their commercial sale. Success in preclinical studies and early-stage clinical trials does not mean that future larger registration clinical trials will be successful because product candidates in later-stage clinical trials may fail to demonstrate safety and efficacy to the satisfaction of the FDA and non-U.S. regulatory authorities despite having progressed through preclinical studies and early-stage clinical trials. Product candidates that have shown promising results in preclinical studies and early-stage clinical trials may still suffer significant setbacks in subsequent registration clinical trials. Additionally, the outcome of preclinical studies and early-stage clinical trials may not be predictive of the success of later-stage clinical trials.