Efficacy Study of Lu AA21004 for Treatment of Major Depressive Disorder

• Change from Baseline in Montgomery-Åsberg Depression Rating Scale (MADRS) Total Score [ Time Frame: Baseline and Week 8. ] [ Designated as safety issue: No ]
  The change between MADRS score at week 8 or final visit relative to baseline. MADRS is a 10-item clinician rated scale that measures overall severity of depressive symptoms (i.e., apparent sadness, reported sadness, inner tension, etc.) rated on a 7-point Likert scale from 0 (normal) to 6 (most abnormal) with a total score range from 0 to 60. Higher scores indicate greater severity of symptoms.
  
  

• MADRS Response at Week 8, with Response Defined as a ≥50% Decrease in the MADRS Total Score from Baseline. [ Time Frame: Baseline and Week 8. ] [ Designated as safety issue: No ]
  The change between MADRS score at week 8 or final visit relative to baseline. MADRS is a 10-item clinician rated scale to measure overall severity of depressive symptoms (i.e., apparent sadness, reported sadness, inner tension, etc.) rated on a 7-point Likert scale from 0 (normal) to 6 (most abnormal) with a total score range from 0 to 60. Higher scores indicate greater severity of symptoms.
  
  
• MADRS Remission at Week 8, with Remission Defined as a MADRS Total Score ≤10 [ Time Frame: 8 Weeks. ] [ Designated as safety issue: No ]
  MADRS is a 10-item clinician rated scale to measure overall severity of depressive symptoms (i.e., apparent sadness, reported sadness, inner tension, etc.) rated on a 7-point Likert scale from 0 (normal) to 6 (most abnormal) with a total score range from 0 to 60. Higher scores indicate greater severity of symptoms.
  
  
• Change from Baseline in the Hamilton Depression Scale (HAM-D17) Total Score After 8 Weeks of Treatment [ Time Frame: 8 Weeks. ] [ Designated as safety issue: No ]
  The HAMD-17 is a 17-item rating scale that assesses depressed mood, agitation and somatic symptoms of depression, rated on a 5-point scale from 0 (absent) to 4 (very severe) with a total score range from 0 to 52. Higher scores indicate greater severity of depression symptoms.
  
  
• Clinical Global Impression Scale-Improvement (CGI-I) Score After 8 Weeks of Treatment [ Time Frame: 8 Weeks. ] [ Designated as safety issue: No ]
  The CGI-I assesses the clinician's impression of the subject's state of mental illness improvement and consists of one question for the investigator: "Compared to his condition at the start of the study, how much has this patient changed?" which is rated on a seven-point scale (1=very much improved; 2=much improved; 3=minimally improved; 4=no change from baseline; 5=minimally worse; 6= much worse; 7=very much worse). Higher scores indicate greater severity of illness.
  
  
• Change from Baseline in Sheehan Disability Scale (SDS) Total Score After 8 Weeks of Treatment [ Time Frame: 8 Weeks. ] [ Designated as safety issue: No ]
  The change between the SDS total score at week 8 or final visit relative to baseline. The SDS is a 3 item rating scale to assess functional impairment (panic, anxiety, phobic and depressive symptoms) over three inter-related domains (work/school, social life, and family life/home responsibilities) rated on an 11 point scale from 0 (not at all) to 10 (extremely) with a total score range from 0 to 30. Higher scores indicate greater severity of impairment.
  
  

Lu AA21004 was discovered by H. Lundbeck A/S, and is under co-development by H. Lundbeck A/S and Takeda for the treatment of major depressive disorder and general anxiety disorder.

Major depressive disorder (MDD) is a chronic, recurring disease with considerable morbidity in the general population. The estimated lifetime prevalence of major depression in the adult population is 5 to 25%, with approximately 2-fold higher prevalence in women than in men. The hallmark of the disease is a depressed mood, with additional symptoms including sleep disturbances, psychomotor agitation or retardation, sexual dysfunction, weight loss, concentration difficulties and delusional ideas. In addition to direct ill effects, MDD causes suicide or job loss and exerts indirect influence on social economy.

This study will assess the efficacy and the safety of Lu AA21004. This study consists of a 1-week screening period, an 8-week double-blind treatment period, 4-week s safety follow-up.The duration of the study is 13 weeks in total. Blood samples will be collected from participants, and a safety follow-up contact (visit or phone call) will be made 4 weeks after completion of the 8-week double-blind treatment period.

Subjects who complete the 8-week double-blind treatment period can successively enter a long-term extension study (Lu AA21004/OCT-001; NCT01395147; hereinafter, OCT-001), if they meet all inclusion criteria and none of exclusion criteria of the OCT-001 study and are willing to participate in the OCT-001 study.

Subjects who will enter the OCT-001 will not be requested to safety follow-up after completion of the 8-week double-blind treatment period.