pyrophosphate and Psoriasis

The authors presented the results of clinical, x-ray and osteoscintigraphic investigations of 133 psoriatic arthritis patients and 72 patients with common psoriasis. Osteoscintigraphy was performed using a routine method with 99mTc-pyrophos (USSR) and 99mTc-phosphone (Hungary) on gamma-camera LFOV (Nuclear-Chicago, USA). X-ray signs of the involvement of the osteoarticular system were noted in 69 (51%) patients with psoriatic arthritis and in 16 (22%) patients with common psoriasis. The method permitted the detection of the foci of RP hyperfixation in 129 (97%) patients with psoriatic arthritis and in 51 (70.8%) patients with common psoriasis. They were observed mostly in large and small limb joints, less frequently--in the vertebral column, cranial bones, thorax, and ribs. Thus, osteoscintigraphy is a highly sensitive method for the detection of active inflammatory foci of the osteoarticular system in psoriasis at all stages of arthritis development. It makes it possible to detect the spreading of arthritis and its preclinical forms.

Topics: Arthritis; Bone and Bones; Chronic Disease; Diphosphates; Evaluation Studies as Topic; Humans; Psoriasis; Radiography; Radionuclide Imaging; Technetium; Technetium Tc 99m Pyrophosphate

Phospholipase A2 activity is raised in non-lesional psoriatic epidermis compared with normal epidermis. It has been shown that the activity of this enzyme is controlled by an inhibitory protein the inhibitory effect of which is increased by dephosphorylation. Treatment of epidermal extracts with alkaline phosphatase reduced the phospholipase A2 activity, both in normal and in lesion-free psoriatic epidermis. Inclusion of pyrophosphate, a protein phosphatase inhibitor, in the homogenizing medium caused the activity of phospholipase A2 in epidermal extracts from normal and lesion-free epidermis to be raised to the same high level. These results are consistent with the hypothesis that the raised phospholipase A2 activity in psoriatic epidermis is due to hyperphosphorylation of an endogenous inhibitor as a result of defective control of a phosphorylation/dephosphorylation mechanism. The relevance of these findings to other work is discussed.

Topics: Alkaline Phosphatase; Diphosphates; Epidermis; Humans; Phospholipases; Phospholipases A; Phospholipases A2; Phosphoprotein Phosphatases; Psoriasis; Skin

Topics: Arthritis; Diphosphates; Humans; Joints; Psoriasis; Radionuclide Imaging; Sodium Pertechnetate Tc 99m; Technetium; Technetium Tc 99m Pyrophosphate

Topics: Arthritis; Diphosphates; Humans; Joints; Psoriasis; Radionuclide Imaging; Sodium Pertechnetate Tc 99m; Technetium; Technetium Tc 99m Pyrophosphate

A juxtaposition between the clinical-laboratory, immunologic and radionucleotide articular parameters was performed in 50 patients with psoriatic arthropathy, distributed according to the incidence of X-ray manifestations. The late and moderate changes in ESK, leukocytes, fibrinogen, DPA and phosphatasemia do not characterize the severity of the disease. A tendency to hyperuricemia and hypercalcemia is established in the period of arthralgia before the X-ray image for bone-tissue damage. The genetic HLA-B27 predetermination plays a certain role for the more frequent involvement of the spine and sacroiliac joints in the pathological process. The disturbances in the immune system are manifested with increased number of early T-lymphocytes, FcG-receptor lymphocytes, complement (C3b)--receptor lymphocytes and spontaneously blast-transformed cells. The increasing IgG content correlates with the accumulation of macromorphological X-ray images and with the index of mineral metabolism from the articular study with 99MTc-pyrophosphate. The changes in the pertechnetium index for articular vascularization are quantitatively insignificant and do not allow the joining of the psoriatic arthropathy to the group of primary synoviarthritis. The accumulation of technetium pyrophosphate in the articular structures is asymmetric, focal and precedes the changes in the X-ray image.

Topics: Adult; Alkaline Phosphatase; Arthritis; Blood Proteins; Blood Sedimentation; Calcium; Diphosphates; Female; Fibrinogen; Humans; Leukocyte Count; Male; Middle Aged; Psoriasis; Sodium Pertechnetate Tc 99m; T-Lymphocytes; Technetium; Technetium Tc 99m Pyrophosphate; Uric Acid

Topics: Adult; Aged; Arthritis; Diphosphates; Female; Humans; Male; Middle Aged; Psoriasis; Radionuclide Imaging; Technetium; Technetium Tc 99m Pyrophosphate

Bone scintigraphs obtained with both Technetium-99m polyphosphate and Technetium-99m pyrophosphate have been abnormal at the sacroiliac joints of 44 patients with definite ankylosing spondylitis (AS). Because of the normal registration of the sacroiliac joints on bone scintigraphy, it has been necessary to develop a profile-scan technique to quantify the abnormality that proves to be significantly different from the normal finding. In 17 patients with a strong clinical suspicion of AS but normal radiographs, the sacroiliac joints have frequently been abnormal. This finding is meaningful because there is a common occurence in this group of the histocompatibility antigen HL A-B27, known to be a marker of AS. We also note the frequency of abnormal sacroiliac scinitigrams in 26 patients with rheumatoid arthritis and in a group of other diseases-Crohn's disease, uveitis, psoriasis, ulcerative colitis, and Reiter's disease-all of which share some of the manifestations of AS.

Topics: Adult; Animals; Arthritis, Reactive; Arthritis, Rheumatoid; Cats; Colitis, Ulcerative; Crohn Disease; Diphosphates; Evaluation Studies as Topic; Humans; Psoriasis; Radionuclide Imaging; Sacroiliac Joint; Spondylitis, Ankylosing; Technetium; Uveitis

The anatomy and pathology of the radiocarpal compartment of the adult wrist are described in a study of human cadavers and 50 consecutive patients with radiocarpal joint abnormalities. The most frequently encountered diseases were adult onset rheumatoid arthritis (42) and calcium pyrophosphate deposition disease (22%). Features allowing radiographic diagnosis included the degree of symmetry and the presence of demineralization, sclerosis, joint space narrowing, subchondral cysts and erosions. Evaluation of abnormalities in other compartments of the wrist and the ulnar styloid is mandatory.

Topics: Adult; Aged; Arthritis; Arthritis, Juvenile; Arthritis, Rheumatoid; Carpal Bones; Diphosphates; Female; Gout; Humans; Male; Middle Aged; Psoriasis; Radiography; Radius; Spondylitis, Ankylosing; Wrist Joint

Scintigraphic exploration of the sacroiliac (S.I.) joints by 99 m-technetium pyrophosphate is simple and free of all danger. The fixation of the isotope in the right sacroiliac (R.S.I.) and the "normal" limits of the fixation ratios R.S.I./L.R. and the lumbar rachis (L.R.), visible on the same film. A series of 28 controls having made it possible to calculate the "normal" limits of the fixation ratios R.S.I./L.R. and L.S.I./L.R., the isotopic fixation was measured in 25 patients with sacroiliac inflammation, 21 of whom were rheumatic, 3 infectious. It was shown that scintigraphy could yield useful information on the evolution of sacroiliac inflammation, making an early diagnosis possible, and also contributing to differentiation between rheumatic and infectious inflammation.

Topics: Adult; Aged; Arthritis, Reactive; Back Pain; Bacterial Infections; Bone and Bones; Diphosphates; Female; Humans; Ilium; Joint Diseases; Male; Middle Aged; Osteoarthritis; Psoriasis; Radionuclide Imaging; Rheumatic Diseases; Sacroiliac Joint; Sacrum; Spinal Diseases; Spondylitis, Ankylosing; Staphylococcal Infections; Technetium; Tuberculosis, Spinal

Topics: Antibodies, Antinuclear; Arthritis, Rheumatoid; Biopsy; Connective Tissue; Dermatomyositis; Diphosphates; Gout; Humans; Hyperparathyroidism; Inflammation; Joint Diseases; Lupus Erythematosus, Systemic; Neutrophils; Polyarteritis Nodosa; Psoriasis; Rheumatoid Factor; Salicylates; Sarcoidosis; Spondylitis, Ankylosing; Synovial Fluid; Synovial Membrane; Uric Acid