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About
This is a pilot study examining the safety and efficacy of a single intra-articular (IA) injection of TTAX03 per joint to relieve severe spinal facet joint (FJ) pain and improve function in subjects with facet joint pain (FJP) in the lumbosacral region. The design is randomized, double blinded, placebo controlled and dose-group sequential.
Full description
This is a Phase 1, randomized, placebo-controlled, double-blinded dose ranging study design with two dose escalation cohorts to be conducted at three sites in the USA. The primary objective is to examine the safety of FJ IA injections with the test article. The fundamental framework for the number of subjects and dose escalation decisions is modeled on the widely utilized phase 1 "3+3" dose escalation design.
A second objective is to examine the efficacy of two doses of TTAX03. The efficacy null hypothesis (HO) is that one administration of TTAX03, introduced into each of two or four joints (at one or two levels) by IA injection, will have no more benefit with respect to pain relief and improved function than an equal volume of placebo (sterile saline). The alternate hypothesis (HA) is that TTAX03 will provide a clinically meaningful reduction in pain and improvement in function compared to placebo.
An exploratory objective is to examine the potential benefit in terms of reduced need for narcotic pain relief, radiofrequency ablation, or surgical procedures for relief of LBP.
Enrollment
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Volunteers
Inclusion criteria
Able and willing to provide written informed consent
Women of childbearing potential (those who are not premenarchal, not surgically sterilized [hysterectomy or bilateral oophorectomy], or not post-menopausal) may participate in the study if they meet all of the following conditions:
Adequate birth control methods are defined as: hormonal-topical, oral, implantable or injectable contraceptives; mechanical-spermicide in conjunction with a barrier such as a condom or diaphragm; IUD; or, surgical sterilization of partner. For non-sexually active females, abstinence may be regarded as an adequate method of birth control; however, if the subject becomes sexually active during the study, she must agree to use an adequate birth control method as described above for the remainder of the study.
NOTE: Women who have had a bilateral tubal ligation are not considered to have been surgically sterilized and must agree to the conditions as specified above.
Post-menopausal is defined as no menstrual period for at least one year.
≥ 35 and ≤ 85 years of age
BMI <40 kg/m2
Clinical suspicion of painful OA of the facet joint(s) in 1 to 4 lumbosacral joints (within 1 - 2 levels) of greater than 3 months duration.
Evidence of OA of the facet in the lumbosacral region on MRI or X-ray within 3 months (e.g., joint space narrowing, the presence of osteophytes and/or subchondral cysts, articular process hypertrophy, subchondral bone sclerosis, articular and subarticular erosions).
NRS score for "worst pain in the past 24 hrs" ≥ 5, using the first NRS value collected in the screening period.
History of having attempted a regimen of conservative care, including physical therapy for ≥ 3 months.
Positive response to two diagnostic MBB, defined as ≥ 80% reduction in pain, at any time within 1 hour, assessed at 1 hour, as self-reported by the subject, following each diagnostic block.
White blood count ≥ 4,500 /uL, absolute neutrophil count (ANC) > 1,000 / uL, platelet count ≥ 75,000 /uL, Hgb ≥ 10 g/dL
Normal prothrombin time (PT) and partial thromboplastin time (PTT).
Hemoglobin A1c (HbA1c) ≤ 8%
Adequate hepatic function (AST/ALT ≤ 1.5 × ULN, total bilirubin ≤ 1.2 × ULN)
Adequate renal function (eGFR ≥ 60 mL/min/1.73 m2)
Currently insufficient pain relief from acetaminophen, NSAIDs or other non-opioid analgesic medications.
Exclusion criteria
Lactation or pregnancy
Cardiovascular instability as indicated by any of the following identified at screening and verified at least once during the initial screening visit: uncontrolled hypertension (systolic blood pressure ≥160 mm Hg or diastolic >100 mm Hg), uncontrolled arrhythmia or unstable angina pectoris.
Cognitive impairment, mental illness, neuroses or untreated depression that would preclude understanding or reliably completing the patient reported outcome measures
History within the past 12 months of gastrointestinal bleeding, myocardial infarction, chronic renal failure, hepatic fibrosis, chronic obstructive pulmonary disease, or hospitalization other than for elective procedures
Non-ambulatory, bedridden, or with active fibromyalgia or central pain syndrome
Hypoesthesia, paresthesia, or allodynia in either foot or leg
Facet OA pain involving more than two levels (i.e., > 4 FJs)
Use of > 30 morphine milligram equivalents (MME) per day (see Study Guide)
Score ≥ 21 on the Beck Depression Inventory (BDI)
Allergy to any local anesthetic agents
Any of the following conditions:
e. Systemic inflammatory disorder f. Radicular syndrome g. Cauda equina syndrome h. Ankylosing spondylitis i. Any arthritis not considered osteoarthritis, such as reactive, rheumatoid, psoriatic or enteropathic arthritis j. History of other autoimmune disease or Crohn's disease
Progressive neurological condition such as Parkinson's, Alzheimer's, Lou Gehrig's disease, etc.
Clinical characteristics suggestive of discogenic pain (i.e., chronic low back pain that subsides in supine position but aggravated after long-time sitting or standing, radicular pain)
Radiologic evidence and radicular pain indicating symptomatic herniated disc
Sacroiliac joint pain or symptomatic nerve root impingement (neurogenic claudication) related to spinal stenosis
Evidence of dynamic listhesis, or fixed listhesis >10 mm accompanied by intermittent claudication or spinal stenosis
Corticosteroid injections within 1 month of screening if injected into the lumbar spine remote from the index facet joints, or within 3 months of screening if injected into the index facet joints, or radiofrequency ablation treatment at any level in the lumbar spine within 6 months of screening for similar symptoms
Prior surgery at the involved levels, including "failed back syndrome"
History of spinal osteonecrosis, osteoporotic fracture, fracture around the index facet joint(s) within the past 3 years, or pars interarticularis defect
Compensable disability or work injury, ongoing or anticipated litigation related to back injury
Sickle cell disease
Erythrocyte sedimentation rate (ESR) >40mm/hr
Use of systemic immunosuppressive medications within past 6 months, including chronic systemic corticosteroids, chemotherapy, or history of organ transplant (kidney, heart, lung)
Concurrent treatment, or treatment in the past 6 months, with any investigational agent
Severe concurrent illness which, in the view of the investigator, would interfere with this 12-month study
Primary purpose
Allocation
Interventional model
Masking
36 participants in 3 patient groups, including a placebo group
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Data sourced from clinicaltrials.gov
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