Association between human T cell leukemia virus 1 (HTLV-1) infection and advanced periodontitis in relation to hematopoietic activity among elderly participants: a cross-sectional study

BACKGROUND@#We reported that human T cell leukemia virus 1 (HTLV-1) infection is positively associated with atherosclerosis. Recent evidence has revealed a close association of periodontitis with atherosclerosis, endothelial dysfunction, and disruption of the microcirculation. However, the association between HTLV-1 and advanced periodontitis has not been investigated to date. Since hematopoietic activity is closely linked to endothelial maintenance activity and is known to decline with age, we hypothesized that the state of hematopoietic activity influenced the association between HTLV-1 and advanced periodontitis in elderly participants.@*METHODS@#A cross-sectional study was performed including 822 elderly participants aged 60-99 years who participated in a dental health check-up. Advanced periodontitis was defined as a periodontal pocket ≥ 6.0 mm. Participants were classified as having low or high hematopoietic activity according to the median values of reticulocytes.@*RESULTS@#HTLV-1 infection was positively related to advanced periodontitis among participants with lower hematopoietic activity (lower reticulocyte count), but not among participants with higher hematopoietic activity (higher reticulocyte count). The adjusted odds ratio (95% confidence interval) considering potential confounding factors was 1.92 (1.05-3.49) for participants with a lower reticulocyte count and 0.69 (0.35-1.36) for participants with a higher reticulocyte count.@*CONCLUSIONS@#Among elderly participants, the association between HTLV-1 infection and advanced periodontitis is influenced by hematopoietic activity. Since hematopoietic activity is associated with endothelial maintenance, these findings provide an efficient tool for clarifying the underlying mechanism of the progression of periodontitis among elderly participants.

Association between human T cell leukemia virus type-1 (HTLV-1) infection and advanced periodontitis in relation to atherosclerosis among elderly Japanese: a cross-sectional study

BACKGROUND@#Human T cell leukemia virus type-1 (HTLV-1) stimulates inflammation activity. Our previous study revealed a positive association between asymptomatic HTLV-1 infection and advanced periodontitis among elderly Japanese individuals with low levels of hematopoietic activity (reflected by reticulocyte levels). Since low hematopoietic activity has been correlated with low-grade inflammation and low-grade inflammation is associated with atherosclerosis, the status of atherosclerosis could, in turn, determine the nature of this association.@*METHODS@#To this end, a cross-sectional study of 907 elderly Japanese individuals (aged 60-99 years), who had participated in dental health check-up during the period 2016-2018, was conducted. Advanced periodontitis was defined as periodontal pocket ≥ 6.0 mm.@*RESULTS@#Among the study population, 295 (32.5%) were found to have atherosclerosis defined as a carotid intima-media thickness (CIMT) of ≥ 1.1 mm. HTLV-1 infection was positively associated with advanced periodontitis in participants with atherosclerosis, but no significant associations were observed among the participants without atherosclerosis. The known risk factors' (including reticulocyte and CIMT) adjusted odds ratio (OR) and 95% confidence interval (CI) of advanced periodontitis were OR 2.01 and 95% CI 1.06-3.81 for participants with atherosclerosis and OR 0.61 and 95% CI 0.34-1.12 for participants without atherosclerosis.@*CONCLUSION@#This study found a significant association between HTLV-1 infection and advanced periodontitis among elderly Japanese with atherosclerosis. However, this association is absent in individuals without atherosclerosis, suggesting that atherosclerosis might act as a determinant in the association between HTLV-1 infection and advanced periodontitis among elderly Japanese.

A Case Report of Successful Surgical Treatment of Removing an Inferior Vena Cava Filter / 日本心臓血管外科学会雑誌

Acute pulmonary embolism (PE), usually secondary to deep venous thrombosis (DVT), is a serious disease which may cause sudden death. An inferior vena cava filter (IVCF) is placed in certain circumstances to prevent recurrence of PE. However, some complications of IVCF have been reported and the indications of IVCF should be reviewed. We encounted a case of IVCF migration which required surgical removal through right intercostal thoracotomy. The patient was a 53-year-old woman. She had undergone the placement of IVCF for DVT followed by anticoagulant therapy. Eight days after, CT revealed IVCF migrated above renal veins. As percutaneous extraction was attempted unsuccessfully, the direct approach to remove IVCF between the hepatic vein and renal vein was indicated. Through the right side thoracotomy at the seventh intercostal space with the division of costal arch, the inferior vena cava (IVC) was exposed near the right atrium. The diaphragm was longitudinally divided straight to IVC and the liver was retraced anteriorly after the careful dissection of the venous plexus on the back of the liver. IVCF could be palpated and just below the branch of the caudate rami and above the right renal vein. After systemic heparinization, IVC and branches were clamped simply and IVC was incised longitudinally. The proximal tip of the IVCF dug into the intima and the distal hook penetrated the vein. IVCF was carefully removed and incision and penetration of IVC were repaired. Her postoperative course was unremarkable, and the patient was discharged without any complications.