Phase I single-blinded, randomized, placebo-controlled trial evaluating safety, tolerability, pharmacokinetics and pharmacodynamics of single injections of ascending doses of investigational drug product Mobilan (М-VM3) administered directly into the prostate of patients with prostate cancer.

Mobilan is a type V adenovirus carrying TLR5 receptor and its agonist, protein 502s. It's mechanism of action involves activation of immune system and extensive mobilisation of various immunocytes to administration locus. It's safety and tolerability is currently evaluated in first-in-man phase I study in prostate cancer patients. Treatment strategy for the disease (radical prostatectomy or active observation) will be determined by the Investigator in accordance with routine clinical practice of the hospital.

Patients will be randomised in cohorts of 4 subjects, where 3 subjects will be administered with Mobilan (М-VM3), and one patient will be administered with placebo.

The dose will be escalated from cohort to cohort, the decision on possible dose escalation will be made by Independent Safety Review Board.

Inclusion Criteria:

1. Subscribed Informed consent for participation in the trial
2. Men aged 45 to 75 years
3. Patients with histologically verified prostate cancer, stage Т1-Т2, N0, M0
4. Patient's ECOG status 0-2
5. Negative tests for serologic markers of HIV-infection, viral hepatitis В and С, syphilis Patient and his partner should agree to use barrier contraception throughout the study period

Exclusion Criteria:

1. Failure to obtain Informed consent

2. Clinical or radiological signs of metastases

3. Indication to hormone therapy of prostate cancer

4. Clinically significant cardiovascular diseases:

   • Myocardial infarction within 6 months prior the screening
   • Unstable stenocardia within 3 months prior the screening
   • Severe circulation failure (FC III)
   • Clinically significant arrhythmias
   • Hypotension (systolic blood pressure < 86 mm Hg) or bradycardia with HR < 50 beats per min.
   • Uncontrolled arterial hypertension (systolic blood pressure > 170 mm Hg or diastolic blood pressure > 105 mm Hg.)

5. Clinically significant CNS diseases at the screening

6. Current infection or another severe or systemic disease which increases risk of treatment sequelae

7. Pituitary gland or adrenal disorders in medical history

8. Other malignant tumors within the last 5 years

9. Other concomitant diseases in medical history which according to Investigator may aggravate during the study, including uncontrolled diabetes mellitus, rectal diseases, rectal fissures, hemorrhoid, rectal polyps, rectostenosis, inflammatory urinary diseases: chronic prostatitis, cystitis, urethral catheter, chronic urine retention.

10. Complicated allergic history, systemic allergic reaction, any dietary allergy, intolerability, limitations or specific diets which according to the Investigator may be a contraindication for subject participation in the present study.

11. Administration of drug products which have a marked effect on immune system within 3 previous months prior the screening, long-term intake of disaggregants (warfarin, low molecular heparin except for ThromboASS).

12. Participation in other clinical studies or administration of investigational drug products within 30 days prior the screening, or persisting adverse reactions of any investigational drug product.

13. Any clinically significant patient's health disorders and/or laboratory abnormalities not enlisted in the Protocol which are identified at the screening, and/or any reason which according to the Investigator may prevent the patient's participation in the study.

14. Drug or alcohol abuse at the screening or in the past which according to the Investigator makes the patient ineligible for participation in the study: intake of more than 5 units of alcohol a week (1 unit of alcohol is equivalent to ½ liter of beer, 200 ml of vine or 50 ml of alcohol) or anamnestic data on alcoholism, narcomania, drug abuse and/or history of significant alcohol or drug abuse inducing drug dependence, within one year prior the screening visit.

15. Vaccination made 14 days prior the study

16. Smoking of more than 10 cigarettes a day

17. Unability to understand or follow study instructions

18. Lack of availability during 29 days after administration of the investigational drug product, fails to follow visit schedule

19. Individual intolerability of the investigational drug product components

Study withdrawal criteria:

1. Any patient may refuse from the study participation on his own wish in any moment on any study stage.

2. Principal Investigator may withdraw any patient from the study in the following cases:

   • Investigator makes the decision that a patient should be withdrawn in his own best interests
   • Patient develops any serious adverse reactions/events in the screening period
   • Patient has been enrolled to the study with violations, or does not follow the protocol requirements
   • Patient needs additional treatment in the screening period

3. Sponsor has right to terminate the study in any moment.

4. Regulatory authorities have right to terminate the study in any moment.