Diamyd Administered Into Lymph Nodes in Combination With Vitamin D in Type 1 Diabetes

The study is a 2-arm, randomized, double-blind, placebo-controlled, multicenter, clinical trial. Eligible patients will receive injections of Diamyd/placebo into an inguinal lymph gland at three occasions, with one month intervals in combination with an oral vitamin D/placebo regimen (starting 1 month ahead of injections) during 4 months. All patients will continue to receive intensive insulin treatment from their personal physicians during the whole study period. The patients will be followed in a blinded manner for a total of 15 months. All patients that have not performed the 15 months visit when the updated protocol is implemented, will be asked to participate in the Extension Study Period which includes an additional visit at month 24.

Inclusion criteria

• Informed consent given by patients and/or patient's parent(s) or legal acceptable representative(s) (guardian(s)) according to national regulations
• Type 1 Diabetes (T1D) according to the Amercian Diabetes Association (ADA) classification diagnosed ≤6 months at the time of screening
• Age: ≥12 and <25 years old
• Fasting C-peptide ≥0.12 nmol/L (0.36 ng/ml) on at least one occasion (maximum 2 tests on different days within a period of 2 weeks)
• Positive for Glutamic Acid Decarboxylase isoform 65 (GAD65A) but < 50 000 IU/ml
• Females must agree to avoid pregnancy and have a negative urine pregnancy test. Patients of childbearing potential must agree to use adequate contraception, until one (1) year after the last administration of Diamyd. Adequate contraception is as follows:

For females of childbearing potential:

• oral (except low-dose gestagen (lynestrenol and norestisteron)), injectable, or implanted hormonal contraceptives
• combined (estrogen and progestogen containing)
• oral, intravaginal or transdermal progesterone hormonal contraception associated with inhibition of ovulation
• intrauterine device
• intrauterine hormone-releasing system (for example, progestin-releasing coil)
• bilateral tubal occlusion
• vasectomized male (with appropriate post vasectomy documentation of the absence of sperm in the ejaculate)
• male partner using condom
• abstinence from heterosexual intercourse

For males of childbearing potential:

• condom (male)
• abstinence from heterosexual intercourse

Exclusion criteria

• Previous or current treatment with immunosuppressant therapy (although topical or inhaled steroids are accepted)
• Continuous treatment with anti-inflammatory drug (sporadic treatment e.g. because of headache or in connection with fever a few days will be accepted)
• Treatment with any oral or injected anti-diabetic medications other than insulin
• A history of anemia or significantly abnormal hematology results at screening
• A history of epilepsy, head trauma or cerebrovascular accident, or clinical features of continuous motor unit activity in proximal muscles
• Clinically significant history of acute reaction to vaccines or other drugs in the past
• Treatment with any vaccine, including influenza vaccine, within 4 months prior to planned first study drug dose or planned treatment with any vaccine up to 4 months after the last injection with study drug.
• Participation in other clinical trials with a new chemical entity within the previous 3 months
• Inability or unwillingness to comply with the provisions of this protocol
• A history of alcohol or drug abuse
• A significant illness other than diabetes within 2 weeks prior to first dosing
• Known HIV or hepatitis
• Females who are lactating or pregnant (the possibility of pregnancy must be excluded by urine βHCG on-site within 24 hours prior to the Diamyd/placebo treatment)
• Presence of associated serious disease or condition, including active skin infections that preclude intralymphatic injection, which in the opinion of the investigator makes the patient non-eligible for the study
• Deemed by the investigator not being able to follow instructions and/or follow the study protocol