We analyzed the causes of death in 74 non-insulin-dependent diabetes mellitus (NIDDM) patients who died in Koseiren Takaoka hospital between 1982 and 1988 and compared with 334 non-diabetic dead patients.
The first cause of death in NIDDM was malignant neoplsma (35.1% of NIDDM). The second was ischemic heart disease (17.6%). The third was infection (12.2%). The ratios of cerebral infarction and diabetic nephropathy were 9.5% each. The ratios of ischemic heart disease and cerebral infarction in diabetics were twice those in non-diabetics. The tratio of uremia in diabetics wassix-fold. In patients over 61 years old, the ratios of ischemic heart disease and diabetic nephropathy were large. Nevertheless, in patients under 60 years old, the proportion of cerebral infarction was higher. The proportions of cerebral infarction and ischemic heart disease were higher in the group of long diabetic duration than in group of short duration.
Compared with past Japanese reports, the proportions of malignant neoplasma and ischemic heart disease in diabetics increased and the proportions of diabetic nephropathy and coma decreased.
This study concluded that not only the control of diabetes mellitus but also the examination of malignant neoplasma was important in management of diabetes mellitus. The proportion of the causes of death in diabetics will change with changes of the circumstances and the progress of medical treatment.

This study used in vivo microdialysis to examine the effects of intragingival application of lipopolysaccharide (LPS) derived from Porphyromonas gingivalis (Pg-LPS) on gingival tumour necrosis factor (TNF)-α and interleukin (IL)-6 levels in rats. A microdialysis probe with an injection needle attached to the surface of the dialysis membrane was implanted into the gingiva of the upper incisor. For comparison, the effects of LPS derived from Escherichia coli (Ec-LPS) on IL-6 and TNF-α levels were also analysed. Pg-LPS (1 μg/1 μL) or Ec-LPS (1 or 6 μg/1 μL) was applied by microsyringe, with gingival dialysates collected every hour. Enzyme-linked immunosorbent assay (ELISA) revealed that gingival dialysates contained approximately 389 pg·mL⁻¹ of IL-6 basally; basal TNF-α levels were lower than the detection limit of the ELISA. Pg-LPS failed to alter IL-6 levels but markedly increased TNF-α levels, which remained elevated for 2 h after treatment. Neither IL-6 nor TNF-α were affected by Ec-LPS. Reverse transcriptase-polymerase chain reaction (RT-PCR) analysis revealed that the gingiva expresses Toll-like receptor (TLR) 2 and TLR4 mRNA. Immunohistochemical examination showed that TLR2 and TLR4 are expressed by gingival epithelial cells. The present study provides in vivo evidence that locally applied Pg-LPS, but not Ec-LPS, into the gingiva transiently increases gingival TNF-α without affecting IL-6. The present results suggest that TLR2 but not TLR4 expressed on gingival epithelial cells may mediate the Pg-LPS-induced increase in gingival TNF-α in rats.
Animals ; Gingiva ; drug effects ; metabolism ; Interleukin-6 ; metabolism ; Lipopolysaccharides ; administration & dosage ; Male ; Porphyromonas gingivalis ; metabolism ; RNA, Messenger ; genetics ; Rats ; Rats, Sprague-Dawley ; Toll-Like Receptor 2 ; genetics ; metabolism ; Toll-Like Receptor 4 ; genetics ; metabolism ; Tumor Necrosis Factor-alpha ; metabolism