Study design was changed

To evaluate the efficacy and safety of ART-123 on sensory symptoms of oxaliplatin-induced peripheral neuropathy (OIPN) in patients with unresectable metastatic colorectal cancer who receive oxaliplatin-containing chemotherapy

To compare the efficacy and safety of ART-123 (low and high dose) to placebo on sensory symptoms of oxaliplatin-induced peripheral neuropathy (OIPN) in patients with unresectable metastatic colorectal cancer who receive oxaliplatin-containing chemotherapy

Inclusion Criteria:

• 18 years of age or older
• Unresectable metastatic colorectal cancer; pathologically confirmed adenocarcinoma of the colon or rectum
• ECOG performance status of 0 or 1
• The most recent laboratory findings (including for liver and kidney) within 14 days prior to randomization remain within acceptable ranges
• Willingness of the patient and the sexual partner to use a highly effective contraceptive method during the course of the study
• Able to sufficiently understand the clinical study and give written informed consent

Exclusion Criteria:

• Prior treatment history with nerve toxic chemotherapeutic agent
• Peripheral neuropathy or central nervous system damage
• Psychiatric disorder
• History of major hemorrhage
• High risk of hemorrhage
• History of other malignancies
• Active ulcer
• Patients using anti-coagulants and fibrinolytic drugs
• Active Hepatitis B, or known HBs antigen positive
• Prior treatment history with thrombomodulin alfa
• Administration of another investigational medicinal product within 30 days prior to randomization
• Patient is pregnant (positive urine human chorionic gonadotropin) or breastfeeding or intends to get pregnant during the Treatment period
• Patients otherwise deemed as inappropriate to participate in the study by the Investigator