Characteristics and Strategy of Cardiovascular Diseases in the Elderly

Sugiura, Masaya; Sakai, Makoto; Hayakawa, Hirokazu; Doi, Yoshinori; Sugishita, Yasuro; Kanmatsuse, K.; Naito, Michitaka

doi:10.3143/geriatrics.31.181

Cited by 1 publication

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A number of pathological mechanisms may arise from the deleterious effects of SHS exposure [6]. The physiologic changes in the aging cardiac include left ventricular hypertrophy, increased cardiac fibrosis and valvular degeneration [9, 10]. Aging changes in the elderly heart are associated with physiological and pathological LV hypertrophy.…”

Section: Introductionmentioning

confidence: 99%

Secondhand smoke exposure toxicity accelerates age-related cardiac disease in old hamsters

Hsieh

et al. 2014

BMC Cardiovasc Disord

View full text Add to dashboard Cite

BackgroundAging is associated with physiological or pathological left ventricular hypertrophy (LVH) cardiac changes. Secondhand smoke (SHS) exposure is associated with pathological LVH. The action mechanism in cardiac concentric hypertrophy from SHS exposure is understood, but the transition contributed from SHS exposure is not. To determine whether exposure to SHS has an impact on age-induced LVH we examined young and old hamsters that underwent SHS exposure in a chamber for 30 mins.MethodsMorphological and histological studies were then conducted using hematoxylin and eosin (H&E) and Masson’s trichrome staining. Echocardiographic analysis was used to determine left ventricular wall thickness and function. LVH related protein expression levels were detected by western blot analysis.ResultsThe results showed that both young and aged hamsters exposed to SHS exhibited increased heart weights and left ventricular weights, left ventricular posterior wall thickness and intraventricular septum systolic and diastolic pressure also increased. However, left ventricular function systolic and diastolic pressure deteriorated. H&E and Masson’s trichrome staining results showed LV papillary muscles were ruptured, resulting in lower cardiac function at the myocardial level. LV muscle fiber arrangement was disordered and collagen accumulation occurred. Concentric LVH related protein molecular markers increased only in young hamsters exposed to SHS. However, this declined with hamster age. By contrast, eccentric LVH related proteins increased in aging hamsters exposed the SHS. Pro-inflammatory proteins, IL-6, TNF-α, JAK1, STAT3, and SIRTI expression increased in aging hamsters exposed to SHS.ConclusionsWe suggest that SHS exposure induces a pro-inflammatory response that results in concentric transition to aging eccentric LVH.

show abstract

Section: Introductionmentioning

confidence: 99%