Takuo Fujita

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CONTEXT Weekly teriparatide injection at a dose of 56.5 μg has been shown to increase bone mineral density. OBJECTIVE A phase 3 study was conducted to determine the efficacy of once-weekly teriparatide injection for reducing the incidence of vertebral fractures in patients with osteoporosis. DESIGN AND SETTING In this randomized, multicenter,(More)
Menatetrenone (2-methyl 1,3-tetraprenyl-1,4-naphtoquinone; vitamin K2) is a vitamin K homolog. To evaluate its efficacy on cortical bone mineral density and its safety, a 24-week double-blind placebo-controlled study was conducted by enrolling 80 osteoporotic patients. Patients were given either 90 mg/day of vitamin K2 (n = 39) or a placebo (n = 41). Bone(More)
The swaying and postural instability frequently seen in elderly subjects had not been analyzed quantitatively in detail until the introduction of computerized posturography. In order to assess the changes of body sway with aging, we performed computerized posturography in 144 subjects (51 men and 93 women, between the ages of 22 and 88 years) without(More)
As inhibitors of bone resorption, bisphosphonates and vitamin D derivatives have been extensively used for the treatment of osteoporosis in various parts of the world, but the clinical effects of these two groups of agents have rarely been compared in detail. A multicenter, prospective, double-blind controlled study was started comparing the effects of(More)
The consequences of such Ca overload in response to Ca deficiency, which can be called Ca deficiency disease or Ca paradox disease, to be more explicit, include osteoporosis, hypertension, arteriosclerosis, degenerating diseases of the central nervous system such as Alzheimer’s disease, diabetes mellitus, muscular dystrophy, and malignancy, especially(More)
A new computerized apparatus was constructed to measure the resonant frequency of human ulnain vivo with high sensitivity and reproducibility. Experimental studies using aluminum bar and dried human bone revealed the importance of the ulna being positioned parallel to the radius, approximately 90 degree flexion of the elbow joint, and minimal muscle(More)
A particular strain of rat, the osteogenic disorder rat (ODS rat), was established in 1973. Phenotypic expression of od/od in ODS rat develops signs characteristic of a vitamin C-deficient animal, with bleeding tendencies and limb fractures. We investigated the bone histomorphometry to clarify the pathogenesis of osteopathy found in ODS rat. Bone(More)
In the present study, 80 patients with degenerative joint disease, spondylosis deformans, and/or osteoarthritis of the knee with back or joint pain, especially on movement and strain, were randomly divided into four groups. Group A received no etidronate, while groups B, C and D received 66, 133 and 200 mg/day etidronate, respectively, for 12 months. Every(More)
To study the effects of repeated ketamine administration on central muscarinic acetylcholine receptors (mAchRs), ddY male mice were administered subcutaneous doses of 25 mg/kg ketamine every 3 days for a total of five times. Receptor binding assays of mAchR were carried out in the forebrain (FB), cerebellum (CB) and brainstem (BS), using [3H]quinuclidinyl(More)
In Japan, unlike in the United States and Europe, where osteoporosis is synonymous with postmenopausal osteoporosis, the need for treatment of osteoporosis has been emphasized only for elderly women with established disease. This may be because women in the immediate postmenopausal period in Japan are virtually free of symptoms such as lumbago and signs(More)