Diabetic neuropathies are the most prevalent chronic complications of diabetes mellitus. The early recognition and appropriate management of neuropathy in the patient with diabetes is important for patient's quality of life and life expectancy. Ozone is well known to have anti-inflammatory and analgesic effects through the inhibition of pro-inflammatory mediators; as well as. stimulation of anti-inflammatory mediators' release

Introduction:

Diabetic neuropathies are the most prevalent chronic complications of diabetes mellitus. The early recognition and appropriate management of neuropathy in the patient with diabetes is important for patient's quality of life and life expectancy. The clinical symptoms of DPN range from pain and burning sensations (at rest or at night) to hypoesthesia, paresthesia, and/or numbness . Diabetic neuropathy can be axonal or demyelinating and can affect large or small neurons. Schwann cells, which are the most abundant glial cells, act as nerve axon insulators and modulators of neurobiology through their role in metabolic support and injury protection. In diabetic patients, church cells' function is disturbed, leading to loss of glial-axon communication and nerve homeostasis, which leads to fiber loss, neurodegeneration, and pain. Nerve conduction studies can detect these changes; however, there has been no effective therapy for the treatment of DPN until now.

Ozone is well known to have anti-inflammatory and analgesic effects through the inhibition of pro-inflammatory mediators; as well as. stimulation of anti-inflammatory mediators' release . Previous studies showed that Ozone promotes peripheral vascular integrity via induction of Vascular Endothelial Growth Factor (VEGF), Transforming Growth Factor Beta (TGF-β1) an Platelet-Derived Growth Factor (PDGF), according with the studies of Professor Bocci that demonstrated significantly increase and release of PDGF, TGF- β1 and VEGF in presence of Ozone .

Inclusion Criteria:

• Sixty adult diabetic patients (type II DM)
• clinically symptomatized painful neuropathy for six or more months.

Exclusion Criteria:

• Patients with other causes of neuropathy (e.g., vitamin B12 deficiency), hereditary neuropathies and entrapment neuropathies, overt neuropathy with foot ulcers and/or amputation, peripheral vascular diseases, vertebral pathologies (e.g., previous surgery, foraminal stenosis, spinal canal stenosis, and/or vertebral disc herniation)
• Patients with other medical conditions such as connective tissue diseases, thyroid disorders, significant renal or hepatic dysfunction, platelet dysfunction syndrome, critical thrombocytopenia, hemodynamic instability and septicemia
• local infection at the site of the procedure
• Consistent use of nonsteroidal anti-inflammatory drugs within the last two weeks
• Systemic corticosteroid administration or local injection at the suspected treatment site within the last month
• Recent fever or illness, hemoglobin level <10 g/dL, platelet count <105 _ 109/L, and/or tobacco use.