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Biomedical subjects

C M Pearson

Publications and source records attributed to C M Pearson.

144 records · Page 8Linked to original sources
PubMedDate not supplied

Wegener's granulomatosis. Long-term followup of patients treated with cyclophosphamide.

Ten patients with Wegener's granulomatosis were treated with cyclophosphamide and followed for periods up to 7 years. In all cases cyclophosphamide induced complete remissions. The mean duration of remission (to date) was 38 months. Six patients have been in remission for a mean of 46 months after cyclophosphamide was discontinued; 2 have been disease-free for 7 years. Of the 10 patients treated, only 1 relapsed and she responded to a second course of cyclophosphamide. These results indicate that cyclophosphamide is the drug of choice in Wegener's granulomatosis. The long-term effectiveness of this drug suggests that it may induce permanent remissions in certain patients with Wegener's granulomatosis.

Adolescent↗
PubMedDate not supplied

The arthropathy of relapsing polychrondritis.

Twenty-three adults (11 males and 12 females) with well-defined relapsing polychondritis (RP) are studied in order to characterize the arthropathy of RP. Arthritis was found in 19 patients-as the presenting feature in 8 and as a significant symptom in 11 others. The usual pattern of involvement was migratory, asymmetric, non-nodular, nonerosive, and seronegative, and affected large and small joints as well as parasternal articulations. In addition RP was seen in 3 patients with preexisting chronic polyarthritis or associated rheuamtic disease.

Adolescent↗
PubMedDate not supplied

Muscular dystrophy and activation of proteinases.

Evidence is presented for the existence of many different systems of proteolytic enzymes in human skeletal muscle. These include the lysosomal system of cathepsins as well as proteinases and peptide hydrolases that are optimally active at neutral and alkaline pH ranges. The majority of proteolytic enzymes examined are found to show increased activity in dystrophic human muscle. Moreover, a high initial rise is observed in cathepsin B1, a thiol-dependent endopeptidase of lysosomes, and in dipeptidyl peptidase IV, a membrane-associated peptidase. In addition, a calcium-activated neutral proteinase is found to be significantly elevated in muscle from patients with Duchenne dystrophy. The possible roles of these proteinases in intracellular protein catabolism and muscle wasting are discussed.

Aminopeptidases↗
PubMedDate not supplied

Adenylosuccinase in human muscular dystrophy.

The level of adenylosuccinase was measured in muscle from patients with Duchenne and other major forms of progressive muscular dystrophies and certain related neuromuscular diseases. The activity was found to be unaltered in all diseases that were examined.

Adenylosuccinate Lyase↗
PubMedDate not supplied

An investigation of DNA-repair phenomena induced by 4-chloromethylbiphenyl (4CMB).

The ability of 4CMB to induce repair phenomena has been investigated in 3 types of assay. No significant unscheduled DNA synthesis or repair replication was found, although the compound gave a weakly positive dose-related response in strand-break assays, with 250 microgram/ml producing significant amounts of strand breaks. These data indicate that 4CMB is a weakly genotoxic agent.

Biphenyl Compounds↗