Publications by authors named "Masataka Shiraki"

: This study analyzed the relationship between pressure pain test outcomes and sarcopenia in elderly patients and explored possible clinical applications. : The participants included 143 older adults requiring long-term care who could be diagnosed with sarcopenia. Along with sarcopenia diagnosis, the participants underwent acupressure testing symmetrically at nine sites (occiput, lower cervical, trapezius, supraspinatus, second rib, lateral epicondyle, gluteus, greater trochanter, and knee), totaling 18 sites.

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  • * Researchers found that women with vertebral fractures had fewer teeth at the start and lost more teeth over time compared to those without fractures.
  • * No significant difference in tooth loss was observed between women with nonvertebral fractures and those without fractures, suggesting that vertebral fractures might be a stronger risk factor for tooth loss.
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Introduction: To investigate the differences in the incidence rates of suspected stage 0/1 osteonecrosis of the jaw (ONJ) and incidence risk of relevant clinical findings of suspected stage 0 ONJ between patients treated with sequential therapy comprising weekly teriparatide for 72 weeks followed by alendronate for 48 weeks vs. those who received monotherapy with alendronate for 120 weeks.

Materials And Methods: Suspected stage 0/1 ONJ was defined by non-specific symptoms.

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Although nitric oxide (NO) is a known factor that regulates the bone physiology, few and discordant results have been obtained in human studies evaluating the effect of nitrates on bone health. We investigated for the relationship between serum NOx level and incident osteoporotic fracture rate prospectively in a cohort consisting of Japanese women. A total of 871 subjects (67.

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Introduction: Available evidence on favorable nutritional factors for preventing osteoporosis remains controversial. Considering the recent increases in life expectancy, we investigated the relationship between incident osteoporotic fractures and dietary habits in early and late postmenopausal phase women.

Materials And Methods: Subjects were Japanese postmenopausal outpatients recruited at a primary care institution in Nagano Prefecture (Nagano Cohort Study).

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Introduction: Little is known about whether substances inducing tissue protein degeneration in the oral cavity are associated with the number of teeth present in postmenopausal women. We sought to investigate the association of urinary pentosidine and serum homocysteine levels with the number of teeth and subsequent tooth loss in Japanese postmenopausal women.

Materials And Methods: Among participants in the Nagano Cohort Study, 785 postmenopausal women (mean age, 68.

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Unlabelled: Japanese postmenopausal women with symptomatic periodontal disease had a significantly smaller increase in the T-score for total hip bone density than those without periodontal disease during medication therapy for osteoporosis. Intervention to treat symptomatic periodontal disease before and/or during osteoporosis therapy could maintain the effect of osteoporosis medications.

Purpose: Women with periodontal disease may be more likely to develop osteoporosis.

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Context: Although homocysteine accumulation is a reported risk factor for several age-related disorders, little is known about its relationship with osteoarthritis (OA).

Objective: We investigated for associations of homocysteine and C677T polymorphism in methylenetetrahydrofolate reductase (MTHFR), which is involved in homocysteine clearance, with the development and progression of spinal OA through a combined cross-sectional and longitudinal cohort study.

Methods: A total of 1306 Japanese postmenopausal outpatients participating in the Nagano Cohort Study were followed for a mean 9.

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Article Synopsis
  • The study investigates whether an increase in bone mineral density (BMD) from a combination treatment of alendronate and alfacalcidol reduces fracture risk in osteoporosis patients compared to alendronate alone.
  • Out of 412 patients analyzed, a slight relationship was identified where BMD increases correlated with lowering fracture risk, but the overall effect was minimal (up to 2.8% attributable to BMD changes).
  • The findings suggest that the fracture risk reduction due to alfacalcidol may not primarily rely on increased BMD, implying other underlying mechanisms could play a role.
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Pentosidine (PEN) and carboxymethyl-lysine (CML) are well-recognized advanced glycation end products (AGEs). However, how these AGEs affect the pathophysiology of osteoporosis and osteoporotic fractures remains controversial. This cross-sectional study aimed to investigate the associations of PEN and CML with bone markers, bone mineral density (BMD), and osteoporotic fractures in postmenopausal women from the Nagano Cohort Study.

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We recently uncovered an association between spinal osteoarthritis and height loss that was independent of incident vertebral fracture. However, the optimal cut-off value of historical height loss (HHL) for discriminating spinal osteoarthritis has not been reported. This cross-sectional study aimed to evaluate the implications of HHL for prevalent vertebral fracture, spinal osteoarthritis, and other co-morbidities in postmenopausal women from the Nagano Cohort Study.

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  • * This study aimed to create a mathematical model that predicts long-term fracture risk after receiving zoledronic acid or a placebo, using short-term bone markers like TRACP-5b and bone mineral density (BMD).
  • * The results indicated that both TRACP-5b and BMD can effectively predict fracture risk in osteoporosis patients, with TRACP-5b being more beneficial as it acts as an earlier marker, ultimately helping clinicians better inform patients about their treatment response.
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Accumulating evidence has shown that patients with lifestyle diseases such as type 2 diabetes mellitus, chronic kidney disease, and chronic obstructive pulmonary disease are at increased risk of osteoporotic fracture. Fractures deteriorate quality of life, activities of daily living, and mortality as well as a lifestyle disease. Therefore, preventing fracture is an important issue for those patients.

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  • A randomized trial was conducted to compare the efficacy and safety of two treatments for osteoporosis in elderly women: minodronate (a bisphosphonate) and raloxifene (a selective estrogen receptor modulator).
  • The study involved 3,896 participants aged over 60, assessing outcomes such as various types of fractures, bone density, and quality of life over two years.
  • Results showed that minodronate significantly improved lumbar spine bone mineral density compared to raloxifene, but the incidence of serious adverse reactions was slightly higher in the raloxifene group.
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In this post hoc analysis of the Denosumab Fracture Intervention Randomized Placebo-Controlled Trial (DIRECT) in Japanese postmenopausal women and men with osteoporosis, we evaluated the relationship between vertebral fracture risk and both bone mineral density (BMD) T-score and percent change after 24 months of denosumab treatment at total hip, femoral neck, and lumbar spine. Logistic regression analysis was performed and the proportion of treatment effect explained by BMD in vertebral fracture risk was estimated. The results demonstrate that both total hip BMD T-score and change can be strong predictors of subsequent fracture risk, and that total hip BMD change explained 73%, while T-score explained 23%, of the treatment effect.

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Study Design: Retrospective observational study from the Nagano Cohort Study.

Objective: Clarify the association between spinal osteoarthritis and loss of stature in postmenopausal women.

Summary Of Background Data: Loss of stature with aging is known to deteriorate health-related quality of life and has been implicated with increased mortality.

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