1.Predictive Factors for Increased Bone Density Following Romosozumab Administration Based on Pre-Administration Blood Test Results
Akira KUWABARA ; Kazuhide INAGE ; Masaomi YAMASHITA ; Sumihisa ORITA ; Yawara EGUCHI ; Yasuhiro SHIGA ; Masahiro INOUE ; Miyako SUZUKI-NARITA ; Takahisa HISHIYA ; Takahito ARAI ; Noriyasu TOSHI ; Kohei OKUYAMA ; Soichiro TOKESHI ; Susumu TASHIRO ; Shuhei OHYAMA ; Noritaka SUZUKI ; Seiji OHTORI
Yonsei Medical Journal 2025;66(4):226-232
Purpose:
Romosozumab reportedly increases bone density in patients with severe osteoporosis; however, data on its clinical effects are limited. We conducted a multicenter retrospective survey to study the bone density-increasing effects of romosozumab and blood test-based predictive factors in patients with severe osteoporosis, examining its effects in clinical practice.
Materials and Methods:
This was a multicenter retrospective observational study. The subjects were patients with severe osteoporosis who were treated with romosozumab at the participating facilities. The increase in bone density was assessed by comparing bone density changes (as a percentage) in the lumbar spine, femoral neck, and total femur before and 12 months after administration using dual-energy X-ray absorptiometry. The association between changes in bone density at each site and pre-treatment bone metabolism markers (Tracp 5b, P1NP), serum calcium levels, nutritional status [Conut score: albumin, total cholesterol (TCho), and total lymphocyte count], and kidney function (eGFR) was assessed.
Results:
In both naïve patients and those switching from bone resorption inhibitors, the bone density increased significantly. In naïve patients, eGFR were positively associated with bone density in the total femur. In cases of switching from bone resorption inhibitors, correlations were found between Tracp 5b and lumbar spine bone mineral density (BMD), as well as between Tracp 5b, Alb, T-Cho, and eGFR in the total femur BMD.
Conclusion
Romosozumab administration significantly increases bone density in osteoporosis, and assessing key predictive factors is necessary to ensure clinical effectiveness.
2.Predictive Factors for Increased Bone Density Following Romosozumab Administration Based on Pre-Administration Blood Test Results
Akira KUWABARA ; Kazuhide INAGE ; Masaomi YAMASHITA ; Sumihisa ORITA ; Yawara EGUCHI ; Yasuhiro SHIGA ; Masahiro INOUE ; Miyako SUZUKI-NARITA ; Takahisa HISHIYA ; Takahito ARAI ; Noriyasu TOSHI ; Kohei OKUYAMA ; Soichiro TOKESHI ; Susumu TASHIRO ; Shuhei OHYAMA ; Noritaka SUZUKI ; Seiji OHTORI
Yonsei Medical Journal 2025;66(4):226-232
Purpose:
Romosozumab reportedly increases bone density in patients with severe osteoporosis; however, data on its clinical effects are limited. We conducted a multicenter retrospective survey to study the bone density-increasing effects of romosozumab and blood test-based predictive factors in patients with severe osteoporosis, examining its effects in clinical practice.
Materials and Methods:
This was a multicenter retrospective observational study. The subjects were patients with severe osteoporosis who were treated with romosozumab at the participating facilities. The increase in bone density was assessed by comparing bone density changes (as a percentage) in the lumbar spine, femoral neck, and total femur before and 12 months after administration using dual-energy X-ray absorptiometry. The association between changes in bone density at each site and pre-treatment bone metabolism markers (Tracp 5b, P1NP), serum calcium levels, nutritional status [Conut score: albumin, total cholesterol (TCho), and total lymphocyte count], and kidney function (eGFR) was assessed.
Results:
In both naïve patients and those switching from bone resorption inhibitors, the bone density increased significantly. In naïve patients, eGFR were positively associated with bone density in the total femur. In cases of switching from bone resorption inhibitors, correlations were found between Tracp 5b and lumbar spine bone mineral density (BMD), as well as between Tracp 5b, Alb, T-Cho, and eGFR in the total femur BMD.
Conclusion
Romosozumab administration significantly increases bone density in osteoporosis, and assessing key predictive factors is necessary to ensure clinical effectiveness.
3.Predictive Factors for Increased Bone Density Following Romosozumab Administration Based on Pre-Administration Blood Test Results
Akira KUWABARA ; Kazuhide INAGE ; Masaomi YAMASHITA ; Sumihisa ORITA ; Yawara EGUCHI ; Yasuhiro SHIGA ; Masahiro INOUE ; Miyako SUZUKI-NARITA ; Takahisa HISHIYA ; Takahito ARAI ; Noriyasu TOSHI ; Kohei OKUYAMA ; Soichiro TOKESHI ; Susumu TASHIRO ; Shuhei OHYAMA ; Noritaka SUZUKI ; Seiji OHTORI
Yonsei Medical Journal 2025;66(4):226-232
Purpose:
Romosozumab reportedly increases bone density in patients with severe osteoporosis; however, data on its clinical effects are limited. We conducted a multicenter retrospective survey to study the bone density-increasing effects of romosozumab and blood test-based predictive factors in patients with severe osteoporosis, examining its effects in clinical practice.
Materials and Methods:
This was a multicenter retrospective observational study. The subjects were patients with severe osteoporosis who were treated with romosozumab at the participating facilities. The increase in bone density was assessed by comparing bone density changes (as a percentage) in the lumbar spine, femoral neck, and total femur before and 12 months after administration using dual-energy X-ray absorptiometry. The association between changes in bone density at each site and pre-treatment bone metabolism markers (Tracp 5b, P1NP), serum calcium levels, nutritional status [Conut score: albumin, total cholesterol (TCho), and total lymphocyte count], and kidney function (eGFR) was assessed.
Results:
In both naïve patients and those switching from bone resorption inhibitors, the bone density increased significantly. In naïve patients, eGFR were positively associated with bone density in the total femur. In cases of switching from bone resorption inhibitors, correlations were found between Tracp 5b and lumbar spine bone mineral density (BMD), as well as between Tracp 5b, Alb, T-Cho, and eGFR in the total femur BMD.
Conclusion
Romosozumab administration significantly increases bone density in osteoporosis, and assessing key predictive factors is necessary to ensure clinical effectiveness.
4.Predictive Factors for Increased Bone Density Following Romosozumab Administration Based on Pre-Administration Blood Test Results
Akira KUWABARA ; Kazuhide INAGE ; Masaomi YAMASHITA ; Sumihisa ORITA ; Yawara EGUCHI ; Yasuhiro SHIGA ; Masahiro INOUE ; Miyako SUZUKI-NARITA ; Takahisa HISHIYA ; Takahito ARAI ; Noriyasu TOSHI ; Kohei OKUYAMA ; Soichiro TOKESHI ; Susumu TASHIRO ; Shuhei OHYAMA ; Noritaka SUZUKI ; Seiji OHTORI
Yonsei Medical Journal 2025;66(4):226-232
Purpose:
Romosozumab reportedly increases bone density in patients with severe osteoporosis; however, data on its clinical effects are limited. We conducted a multicenter retrospective survey to study the bone density-increasing effects of romosozumab and blood test-based predictive factors in patients with severe osteoporosis, examining its effects in clinical practice.
Materials and Methods:
This was a multicenter retrospective observational study. The subjects were patients with severe osteoporosis who were treated with romosozumab at the participating facilities. The increase in bone density was assessed by comparing bone density changes (as a percentage) in the lumbar spine, femoral neck, and total femur before and 12 months after administration using dual-energy X-ray absorptiometry. The association between changes in bone density at each site and pre-treatment bone metabolism markers (Tracp 5b, P1NP), serum calcium levels, nutritional status [Conut score: albumin, total cholesterol (TCho), and total lymphocyte count], and kidney function (eGFR) was assessed.
Results:
In both naïve patients and those switching from bone resorption inhibitors, the bone density increased significantly. In naïve patients, eGFR were positively associated with bone density in the total femur. In cases of switching from bone resorption inhibitors, correlations were found between Tracp 5b and lumbar spine bone mineral density (BMD), as well as between Tracp 5b, Alb, T-Cho, and eGFR in the total femur BMD.
Conclusion
Romosozumab administration significantly increases bone density in osteoporosis, and assessing key predictive factors is necessary to ensure clinical effectiveness.
5.Predictive Factors for Increased Bone Density Following Romosozumab Administration Based on Pre-Administration Blood Test Results
Akira KUWABARA ; Kazuhide INAGE ; Masaomi YAMASHITA ; Sumihisa ORITA ; Yawara EGUCHI ; Yasuhiro SHIGA ; Masahiro INOUE ; Miyako SUZUKI-NARITA ; Takahisa HISHIYA ; Takahito ARAI ; Noriyasu TOSHI ; Kohei OKUYAMA ; Soichiro TOKESHI ; Susumu TASHIRO ; Shuhei OHYAMA ; Noritaka SUZUKI ; Seiji OHTORI
Yonsei Medical Journal 2025;66(4):226-232
Purpose:
Romosozumab reportedly increases bone density in patients with severe osteoporosis; however, data on its clinical effects are limited. We conducted a multicenter retrospective survey to study the bone density-increasing effects of romosozumab and blood test-based predictive factors in patients with severe osteoporosis, examining its effects in clinical practice.
Materials and Methods:
This was a multicenter retrospective observational study. The subjects were patients with severe osteoporosis who were treated with romosozumab at the participating facilities. The increase in bone density was assessed by comparing bone density changes (as a percentage) in the lumbar spine, femoral neck, and total femur before and 12 months after administration using dual-energy X-ray absorptiometry. The association between changes in bone density at each site and pre-treatment bone metabolism markers (Tracp 5b, P1NP), serum calcium levels, nutritional status [Conut score: albumin, total cholesterol (TCho), and total lymphocyte count], and kidney function (eGFR) was assessed.
Results:
In both naïve patients and those switching from bone resorption inhibitors, the bone density increased significantly. In naïve patients, eGFR were positively associated with bone density in the total femur. In cases of switching from bone resorption inhibitors, correlations were found between Tracp 5b and lumbar spine bone mineral density (BMD), as well as between Tracp 5b, Alb, T-Cho, and eGFR in the total femur BMD.
Conclusion
Romosozumab administration significantly increases bone density in osteoporosis, and assessing key predictive factors is necessary to ensure clinical effectiveness.
6.Correlation Between Walking Ability and Monthly Care Costs in Elderly Patients After Surgical Treatments for Hip Fractures.
Koki ABE ; Kazuhide INAGE ; Keishi YAMASHITA ; Masaomi YAMASHITA ; Akiyoshi YAMAMAOKA ; Masaki NORIMOTO ; Yoshinori NAKATA ; Takeshi MITSUKA ; Kaoru SUSEKI ; Sumihisa ORITA ; Kazuki FUJIMOTO ; Yasuhiro SHIGA ; Hirohito KANAMOTO ; Masahiro INOUE ; Hideyuki KINOSHITA ; Tomotaka UMIMURA ; Yawara EGUCHI ; Takeo FURUYA ; Kazuhisa TAKAHASHI ; Seiji OHTORI
Annals of Rehabilitation Medicine 2018;42(4):569-574
OBJECTIVE: To validate the relationship between residual walking ability and monthly care cost as well as long-term care insurance (LTCI) certification level in elderly patients after surgical treatment for hip fractures in Japan. METHODS: Elderly patients aged >75 years who underwent surgical treatment for hip fractures in our hospital were included. The preand post-surgical (6-month) walking ability and LTCI certification and the presence or absence of dementia was determined from medical records and questionnaires. Walking ability was classified into 6 levels used in our daily medical practice. Based on these data, we correlated the relationship between walking ability and the LTCI certification level. Further, based on the official statistics pertaining to the average monthly costs per person at each LTCI certification level, we evaluated the relationship between walking ability and monthly care cost. RESULTS: A total of 105 cases (mean age, 80.2 years; 16 men; 39 patients with dementia) were included. The correlation between walking ability and average monthly cost per person as well as LTCI certification level at 6 months postoperatively (r=0.58) was demonstrated. The correlation was found in both groups with and without dementia. CONCLUSION: The ability to walk reduced the cost of care in elderly patients who experienced hip fracture, regardless of the presence of dementia.
Aged*
;
Certification
;
Cost-Benefit Analysis
;
Dementia
;
Hip Fractures*
;
Hip*
;
Humans
;
Insurance, Long-Term Care
;
Japan
;
Long-Term Care
;
Male
;
Medical Records
;
Mobility Limitation
;
Walking*
7.Freeze-Dried Human Platelet-Rich Plasma Retains Activation and Growth Factor Expression after an Eight-Week Preservation Period.
Yasuhiro SHIGA ; Go KUBOTA ; Sumihisa ORITA ; Kazuhide INAGE ; Hiroto KAMODA ; Masaomi YAMASHITA ; Toru ISEKI ; Michihiro ITO ; Kazuyo YAMAUCHI ; Yawara EGUCHI ; Takeshi SAINOH ; Jun SATO ; Kazuki FUJIMOTO ; Koki ABE ; Hirohito KANAMOTO ; Masahiro INOUE ; Hideyuki KINOSHITA ; Takeo FURUYA ; Masao KODA ; Yasuchika AOKI ; Tomoaki TOYONE ; Kazuhisa TAKAHASHI ; Seiji OHTORI
Asian Spine Journal 2017;11(3):329-336
STUDY DESIGN: Controlled laboratory study. PURPOSE: This study aimed to evaluate the efficacy of platelet-rich plasma (PRP) stored at room temperature (RT), frozen, or after freeze-drying. OVERVIEW OF LITERATURE: PRP enriches tissue repair and regeneration, and is a novel treatment option for musculoskeletal pathologies. However, whether biological activity is preserved during PRP storage remains uncertain. METHODS: PRP was prepared from blood of 12 healthy human volunteers (200 mL/person) and stored using three methods: PRP was stored at RT with shaking, PRP was frozen and stored at −80℃, or PRP was freeze-dried and stored at RT. Platelet counts and growth factor content were examined immediately after preparation, as well as 2, 4, and 8 weeks after storage. Platelet activation rate was quantified by flow cytometry. RESULTS: Platelet counts were impossible to determine in many RT samples after 2 weeks, but they remained at constant levels in frozen and freeze-dried samples, even after 8 weeks of storage. Flow cytometry showed approximately 80% activation of the platelets regardless of storage conditions. Almost no growth factors were detected in the RT samples after 8 weeks, while low but significant expression was detected in the frozen and freeze-dried PRP. Over time, the mean relative concentrations of various growth factors decreased significantly or disappeared in the RT group. In the frozen group, levels were maintained for 4 weeks, but decreased significantly by 8 weeks (p <0.05). The freeze-dried group maintained baseline levels of growth factors for the entire 8-week duration. CONCLUSIONS: Freeze-drying enables PRP storage while maintaining bioactivity and efficacy for extended periods.
Blood Preservation
;
Flow Cytometry
;
Freeze Drying
;
Healthy Volunteers
;
Humans*
;
Intercellular Signaling Peptides and Proteins
;
Pathology
;
Platelet Activation
;
Platelet Count
;
Platelet-Rich Plasma*
;
Regeneration
8.Drastic Therapy for Listerial Brain Abscess Involving Combined Hyperbaric Oxygen Therapy and Antimicrobial Agents.
Keiichi NAKAHARA ; Satoshi YAMASHITA ; Katsumasa IDEO ; Seigo SHINDO ; Tomohiro SUGA ; Akihiko UEDA ; Shoji HONDA ; Tomoo HIRAHARA ; Masaki WATANABE ; Taro YAMASHITA ; Yasushi MAEDA ; Yasuhiro YONEMOCHI ; Tomohiro TAKITA ; Yukio ANDO
Journal of Clinical Neurology 2014;10(4):358-362
BACKGROUND: Listeria monocytogenes (L. monocytogenes) is a rare causative pathogen of brain abscess that is often found in immunocompromised patients. Although patients with supratentorial listerial abscesses showed a longer survival with surgical drainage, the standard therapy for patients with subtentorial lesions has not been established. CASE REPORT: We report herein a patient with supra- and subtentorial brain abscesses caused by L. monocytogenes infection. These abscesses did not respond to antibiotics, and his symptoms gradually worsened. Drainage was not indicated for subtentorial lesions, and the patient was additionally treated with hyperbaric oxygen therapy, which dramatically reduced the volume of abscesses and improved the symptoms. CONCLUSIONS: This is the first report of drastic therapy for a patient with listerial brain abscesses involving combined antibiotics and hyperbaric oxygen therapy. The findings suggest that hyperbaric oxygen therapy is a good option for treating patients with deep-seated listerial abscesses and for who surgical drainage is not indicated.
Abscess
;
Anti-Bacterial Agents
;
Anti-Infective Agents*
;
Brain Abscess*
;
Drainage
;
Humans
;
Hyperbaric Oxygenation*
;
Immunocompromised Host
;
Listeria monocytogenes
9.Incidence of Nocturnal Leg Cramps in Patients with Lumbar Spinal Stenosis before and after Conservative and Surgical Treatment.
Seiji OHTORI ; Masaomi YAMASHITA ; Yasuaki MURATA ; Yawara EGUCHI ; Yasuchika AOKI ; Hiromi ATAKA ; Jiro HIRAYAMA ; Tomoyuki OZAWA ; Tatsuo MORINAGA ; Hajime ARAI ; Masaya MIMURA ; Hiroto KAMODA ; Sumihisa ORITA ; Masayuki MIYAGI ; Tomohiro MIYASHITA ; Yuzuru OKAMOTO ; Tetsuhiro ISHIKAWA ; Hiroaki SAMEDA ; Tomoaki KINOSHITA ; Eiji HANAOKA ; Miyako SUZUKI ; Munetaka SUZUKI ; Takato AIHARA ; Toshinori ITO ; Gen INOUE ; Masatsune YAMAGATA ; Tomoaki TOYONE ; Gou KUBOTA ; Yoshihiro SAKUMA ; Yasuhiro OIKAWA ; Kazuhide INAGE ; Takeshi SAINOH ; Jun SATO ; Kazuyo YAMAUCHI ; Kazuhisa TAKAHASHI
Yonsei Medical Journal 2014;55(3):779-784
PURPOSE: To examine the effects of conservative and surgical treatments for nocturnal leg cramps in patients with lumbar spinal stenosis (LSS). Nocturnal leg cramps is frequently observed in patients with peripheral neuropathy. However, there have been few reports on the relationship between nocturnal leg cramps and LSS, and it remains unknown whether conservative or surgical intervention has an impact on leg cramps in patients with LSS. MATERIALS AND METHODS: The subjects were 130 LSS patients with low back and leg pain. Conservative treatment such as exercise, medication, and epidural block was used in 66 patients and surgical treatment such as decompression or decompression and fusion was performed in 64 patients. Pain scores and frequency of nocturnal leg cramps were evaluated based on self-reported questionnaires completed before and 3 months after treatment. RESULTS: The severity of low back and leg pain was higher and the incidence of nocturnal leg cramps was significantly higher before treatment in the surgically treated group compared with the conservatively treated group. Pain scores improved in both groups after the intervention. The incidence of nocturnal leg cramps was significantly improved by surgical treatment (p=0.027), but not by conservative treatment (p=0.122). CONCLUSION: The findings of this prospective study indicate that the prevalence of nocturnal leg cramps is associated with LSS and severity of symptoms. Pain symptoms were improved by conservative or surgical treatment, but only surgery improved nocturnal leg cramps in patients with LSS. Thus, these results indicate that the prevalence of nocturnal leg cramps is associated with spinal nerve compression by LSS.
Adult
;
Aged
;
Aged, 80 and over
;
Decompression, Surgical
;
Female
;
Humans
;
Leg/*pathology
;
Low Back Pain/epidemiology/etiology
;
Male
;
Middle Aged
;
Pain/*epidemiology/*etiology
;
Prospective Studies
;
Questionnaires
;
Spinal Stenosis/*complications/*physiopathology/surgery
10.Conservative and Surgical Treatment Improves Pain and Ankle-Brachial Index in Patients with Lumbar Spinal Stenosis.
Seiji OHTORI ; Masaomi YAMASHITA ; Yasuaki MURATA ; Yawara EGUCHI ; Yasuchika AOKI ; Hiromi ATAKA ; Jiro HIRAYAMA ; Tomoyuki OZAWA ; Tatsuo MORINAGA ; Hajime ARAI ; Masaya MIMURA ; Hiroto KAMODA ; Sumihisa ORITA ; Masayuki MIYAGI ; Tomohiro MIYASHITA ; Yuzuru OKAMOTO ; Tetsuhiro ISHIKAWA ; Hiroaki SAMEDA ; Tomoaki KINOSHITA ; Eiji HANAOKA ; Miyako SUZUKI ; Munetaka SUZUKI ; Takato AIHARA ; Toshinori ITO ; Gen INOUE ; Masatsune YAMAGATA ; Tomoaki TOYONE ; Gou KUBOTA ; Yoshihiro SAKUMA ; Yasuhiro OIKAWA ; Kazuhide INAGE ; Takeshi SAINOH ; Kazuyo YAMAUCHI ; Kazuhisa TAKAHASHI
Yonsei Medical Journal 2013;54(4):999-1005
PURPOSE: The pathological mechanism of lumbar spinal stenosis is reduced blood flow in nerve roots and degeneration of nerve roots. Exercise and prostaglandin E1 is used for patients with peripheral arterial disease to increase capillary flow around the main artery and improve symptoms; however, the ankle-brachial index (ABI), an estimation of blood flow in the main artery in the leg, does not change after treatment. Lumbar spinal nerve roots contain somatosensory, somatomotor, and unmyelinated autonomic nerves. Improved blood flow by medication with prostaglandin E1 and decompression surgery in these spinal nerve roots may improve the function of nerve fibers innervating muscle, capillary, and main vessels in the lower leg, resulting in an increased ABI. The purpose of the study was to examine whether these treatments can improve ABI. MATERIALS AND METHODS: One hundred and seven patients who received conservative treatment such as exercise and medication (n=56) or surgical treatment (n=51) were included. Low back pain and leg pain scores, walking distance, and ABI were measured before treatment and after 3 months of conservative treatment alone or surgical treatment followed by conservative treatment. RESULTS: Low back pain, leg pain, and walking distance significantly improved after both treatments (p<0.05). ABI significantly increased in each group (p<0.05). CONCLUSION: This is the first investigation of changes in ABI after treatment in patients with lumbar spinal stenosis. Improvement of the spinal nerve roots by medication and decompression surgery may improve the supply of blood flow to the lower leg in patients with lumbar spinal stenosis.
Adult
;
Aged
;
Aged, 80 and over
;
Alprostadil/therapeutic use
;
*Ankle Brachial Index
;
Decompression, Surgical/methods
;
Female
;
Humans
;
Low Back Pain/drug therapy/physiopathology/surgery/*therapy
;
Lumbar Vertebrae/physiopathology/*surgery
;
Male
;
Middle Aged
;
Pain/surgery
;
Spinal Nerve Roots/physiopathology
;
Spinal Stenosis/physiopathology/*surgery/*therapy
;
Treatment Outcome

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