Pieter Martens

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OBJECTIVE The repertoire of T cells in patients with rheumatoid arthritis (RA) is characterized by clonal expansion of selected CD4+ T cells, which are autoreactive and lack the expression of the functionally important CD28 molecule. The goal of this study was to determine the contribution of these unusual lymphocytes to the disease process. METHODS RA(More)
OBJECTIVE To review clinical and laboratory features of lupus panniculitis from a large group of patients. METHODS Retrospective chart review of patients diagnosed with lupus panniculitis at a tertiary medical center from 1976 to 1993. RESULTS Lupus panniculitis occurred most frequently in adult women. Skin lesions involved proximal extremities, trunk,(More)
BACKGROUND While oligoclonality of circulating CD4- CD8 and of CD8+ T cells is not uncommon, clonal dominance within the CD4 compartment is not frequently found in healthy individuals. In contrast, the majority of patients with rheumatoid arthritis (RA) have clonally expanded CD4+ T cell populations. Previous studies have demonstrated that these clonogenic(More)
OBJECTIVES To estimate the incidence of physician-diagnosed primary Sjögren syndrome (SS) among residents of Olmsted County, Minnesota, in the setting of usual medical care and to determine how often objective criteria are available in the medical records of such patients. PATIENTS AND METHODS We reviewed all medical records of residents in Olmsted County(More)
BACKGROUND Heme-oxygenase 1 (HO-1), an inducible heme-degrading enzyme, has antiatherogenic effects through its enzymatic end products. HO-1 gene expression is modulated by a guanidine thymidine dinucleotide ([GT]n) repeat polymorphism in the promoter region. Shorter repeats with (GT)n < 25 are associated with higher inducibility and activity of HO-1. (More)
Adequate cleansing of the bowel is important for a reliable and diagnostic colonoscopy. Proper bowel preparation is directly correlated to the diagnostic performance of colonoscopy, procedure time, cost price and the complication rate. The ideal bowel preparation agent should be efficient, safe and well tolerated by the patient. Numerous agents have become(More)
OBJECTIVE Sjögren's syndrome (SS) has been associated with development of lymphoid malignancies and other significant medical complications, but the effect of SS on survival in a population based sample has not been reported. We analyzed survival in an incidence cohort of patients diagnosed with SS in residents of Olmsted County, Minnesota, USA, between(More)
UNLABELLED Hypoglycemia is common in daily clinical practice and often occurs during the treatment of diabetes mellitus. However, a small minority of hypoglycemia encountered in clinical practice is spontaneous and thus not induced by glycemic lowering agents. These spontaneous hypoglycemic events confront the clinician with a diagnostic enigma. Although(More)