| Author | Ozaki, Toshifumi| |
|---|---|
| Published Date | 1989-06 |
| Publication Title | 岡山医学会雑誌 |
| Volume | volume101 |
| Issue | issue5-6 |
| Content Type | Journal Article |
| FullText URL | K000901.pdf |
|---|---|
| Author | Ozaki, Toshifumi| |
| Published Date | 1991-03-28 |
| Content Type | Thesis or Dissertation |
| Grant Number | 甲第901号 |
| Granted Date | 1991-03-28 |
| Thesis Type | Doctor of Philosophy in Medical Science |
| Grantor | 岡山大学 |
| language | 日本語 |
| JaLCDOI | 10.18926/AMO/32654 |
|---|---|
| FullText URL | fulltext.pdf |
| Author | Ozaki, Toshifumi| Inoue, Hajime| Sugihara, Shinsuke| Sumii, Hiroshi| |
| Abstract | <p>Radiological findings on the fate of grafted Kiel bone implants for the treatment of bone tumors were evaluated in 25 lesions. The mean follow-up period was 14.8 years, ranging from 5 to 21.8 years. We classified the radiological findings into 4 grades; Excellent (4 lesions), Good (14 lesions), Fair (2 lesions), and Poor (5 lesions). All cases of the Poor grade were polyostotic fibrous dysplasia. The younger the patient at the time of the operation, the more rapidly Kiel bone grafts tended to be incorporated. The grafted bone can become enmeshed in the structure of the recipient bed (Good or Excellent grades) within 10 years in most cases, except in polyostotic fibrous dysplasia.</p> |
| Keywords | xenogeneic bone bone grafting bone neoplasms |
| Amo Type | Article |
| Published Date | 1992-04 |
| Publication Title | Acta Medica Okayama |
| Volume | volume46 |
| Issue | issue2 |
| Publisher | Okayama University Medical School |
| Start Page | 87 |
| End Page | 92 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | 英語 |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 1575062 |
| Web of Science KeyUT | A1992HR48400005 |
| JaLCDOI | 10.18926/AMO/32621 |
|---|---|
| FullText URL | fulltext.pdf |
| Author | Ozaki, Toshifumi| Inoue, Hajime| Sugihara, Shinsuke| |
| Abstract | <p>We evaluated the surgical problems encountered during treatment of 14 patients with malignant tumors originating in the pelvic region at our department. The tumor involved the iliac bone in 6 patients, the ischial bone in 2, the pubic bone in 2, and the gluteal region in 4. Invasion to the sacrum was observed in 7 patients. Twelve patients underwent surgical procedures consisting of intralesional resection in 6, marginal resection in 3, and wide margin resection in 3. Six of the 7 patients with sacral invasion developed local recurrence. Two patients with chondrosarcoma and one with parosteal osteosarcoma survived for 4 or more years, but the mean survival period in those with high grade malignant tumors was 11 months. These findings indicate the difficulties encountered in the treatment of malignant pelvic tumors.</p> |
| Keywords | bone neoplasms soft tissue neoplasms malignant neoplasms pelvis surgical treatment |
| Amo Type | Article |
| Published Date | 1992-08 |
| Publication Title | Acta Medica Okayama |
| Volume | volume46 |
| Issue | issue4 |
| Publisher | Okayama University Medical School |
| Start Page | 265 |
| End Page | 271 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | 英語 |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 1442150 |
| Web of Science KeyUT | A1992JL44200006 |
| JaLCDOI | 10.18926/AMO/32641 |
|---|---|
| FullText URL | fulltext.pdf |
| Author | Ozaki, Toshifumi| Inoue, Hajime| Taguchi, Kohji| Sugihara, Shinsuke| |
| Abstract | <p>We compared gadolinium diethylenetriaminepentaacetic acid (Gd-DTPA) enhanced T1-weighted images (T1-Gd) with the histopathological findings in 13 patients with bone or soft tissue sarcomas. Signal intensity of the viable tumor tissue was increased in T1-Gd in 92% of the patients. The necrotic or cystic areas in the tumor were not enhanced, rendering them distinctly. The degree of enhancement of the edematous area around the tumor was similar to or more marked than that of the tumor in 54% of the patients. Area showing inflammatory cells infiltration and edematous areas in the tumor tissue were also enhanced. Thus, the effect of preoperative chemotherapy in tumor tissues other than necrotic and cystic areas tended to be underestimated in T1-Gd. Its effect should be comprehensively evaluated based on not only T1-Gd but also T2-weighted images and findings of other imaging techniques.</p> |
| Keywords | gadolinium diethylenetriaminepentaacetic acid(DTPA) magnetic resonance(MR) bone neoplasms soft tissue neoplasms |
| Amo Type | Article |
| Published Date | 1992-12 |
| Publication Title | Acta Medica Okayama |
| Volume | volume46 |
| Issue | issue6 |
| Publisher | Okayama University Medical School |
| Start Page | 471 |
| End Page | 477 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | 英語 |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 1485542 |
| Web of Science KeyUT | A1992KE49600010 |
| JaLCDOI | 10.18926/AMO/31575 |
|---|---|
| FullText URL | fulltext.pdf |
| Author | Ozaki, Toshifumi| Sugihara, Shinsuke| Inoue, Hajime| |
| Abstract | <p>We report second malignant neoplasms which developed between 7 and 19 years after treatment in 3 pediatric patients with osteosarcoma. Two patients had been treated with only surgery, and another patient had been treated with a combination of surgery with chemotherapy and radiation therapy for primary lesions. Pediatric patients with osteosarcoma, in particular, require careful long-term follow-up to monitor not only metastases but also development of second malignant neoplasms.</p> |
| Keywords | osteosarcoma second malignancy |
| Amo Type | Article |
| Published Date | 1993-04 |
| Publication Title | Acta Medica Okayama |
| Volume | volume47 |
| Issue | issue2 |
| Publisher | Okayama University Medical School |
| Start Page | 129 |
| End Page | 133 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | 英語 |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 8506750 |
| Web of Science KeyUT | A1993LA45200010 |
| JaLCDOI | 10.18926/AMO/30784 |
|---|---|
| FullText URL | fulltext.pdf |
| Author | Kunisada, Toshiyuki| Kawai, Akira| Ozaki, Toshifumi| Sugihara, Shinsuke| Taguchi, Kohji| Inoue, Hajime| |
| Abstract | <p>In this study, we reviewed the clinical features of 11 patients with malignant schwannoma who were treated in our institute. Five patients had coexistent von Recklinghausen's disease and one of them showed multifocal occurrence. Patients with the centrally located tumors had a poorer prognosis than those with the others. The overall 3-year survival rate was 36%; 40% in patients with von Recklinghausen's disease and 33% in the others. At the time of the last follow-up, 9 patients had died of the tumor, one continued to be tumor free, and one was alive with tumor. Postoperative local recurrence developed in 5 patients (45%); 4 out of 6 patients (67%) who underwent a marginal excision and one out of 3 (33%) who underwent primary amputation. There was no local recurrence in patients after a wide excision with at least 3cm of normal tissue removed surrounding the tumor in all directions. Nine patients (82%) developed pulmonary metastasis. The effect of adjuvant chemotherapy was not clear in this study. The high risk of pulmonary metastasis in this disease indicates the necessity of more effective adjuvant chemotherapy.</p> |
| Keywords | malignant schwannoma clinical analysis von Recklinghausen's disease |
| Amo Type | Article |
| Published Date | 1997-04 |
| Publication Title | Acta Medica Okayama |
| Volume | volume51 |
| Issue | issue2 |
| Publisher | Okayama University Medical School |
| Start Page | 87 |
| End Page | 92 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | 英語 |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 9142345 |
| Web of Science KeyUT | A1997WX19600005 |
| JaLCDOI | 10.18926/AMO/30776 |
|---|---|
| FullText URL | fulltext.pdf |
| Author | Makihata, Eiichi| Kuroda, Masahiro| Kawai, Akira| Ozaki, Toshifumi| Sugihara, Shinsuke| Inoue, Hajime| Joja, Ikuo| Asaumi, Junichi| Kawasaki, Shoji| Hiraki, Yoshio| |
| Abstract | <p>We report the results of phase I/II studies of preoperative multidisciplinary treatment of 14 patients with soft tissue sarcoma using hyperthermia from November 1990 to April 1995. The preoperative treatment was conducted with thermo-radio-chemotherapy in 11 cases of stage III, and with thermo-radiotherapy as well as thermo-chemotherapy in three cases of stages I and II. Hyperthermia was carried out twice a week with totals ranging from 4 to 14 times (average: 8.4 times); each session lasted 60min. Radiotherapy was administered four or five times per week, and the dose was 1.8 2Gy/fraction, with a total of 30-40Gy in a four week period. Chemotherapy was mainly in the form of MAID regimen (2-mercaptoethanesulphonic acid (mesna), adriamycin, ifosfamide and dacarbazine). The tumors were surgically resected in all patients after completing the preoperative treatment. The efficacy rate, as expressed by the percentage of either tumors in which reduction rate was 50% or more, or tumors for which post-treatment contrast enhanced CT image revealed low density volumes occupying 50% or more of the total mass, was 71 % (ten of the 14 tumors). The mean tumor necrosis rate in the resected specimens was 78%. The tumor necrosis rate was significantly high (P < 0.05) in patients whose Time ≥ 42°C was of long duration. Postoperative complications were observed in six patients; among these, two patients developed wound infection that required surgical treatment as a complication of surgery performed in the early stage following the preoperative treatment. After a mean postoperative follow-up of 27 months, distant metastasis occurred in four patients resulting in three fatalities. The three-year cumulative survival rate was 64.3%. No local recurrence was observed in any patient during the follow-up, thus confirming our hypothesis that preoperative multidisciplinary treatment has an excellent local efficacy. We think that it would be valuable to conduct, at many facilities, phase III studies on the treatment of soft tissue sarcoma by a combination of surgery and preoperative multidisciplinary treatment using hyperthermia, paying close attention to the interval between these two modalities.</p> |
| Keywords | soft tissue tumor hyperthermia radiotherapy chemotherapy |
| Amo Type | Article |
| Published Date | 1997-04 |
| Publication Title | Acta Medica Okayama |
| Volume | volume51 |
| Issue | issue2 |
| Publisher | Okayama University Medical School |
| Start Page | 93 |
| End Page | 99 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | 英語 |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 9142346 |
| Web of Science KeyUT | A1997WX19600006 |
| JaLCDOI | 10.18926/AMO/31340 |
|---|---|
| FullText URL | fulltext.pdf |
| Author | Ozaki, Toshifumi| Nakatsuka, Yoichi| Kawai, Akira| Akazawa, Hirofumi| Kunisada, Toshiyuki| Inoue, Hajime| |
| Abstract | <p>There are few reports on skeletal reconstruction using the bone transport technique to repair bone defects caused by resections of tumors associated with osteosarcoma. We attempted to reconstruct a 23 cm bone defect after resection of an osteosarcoma of the left femur, and succeeded in gaining 17 cm by bone transport. Five years after surgery, this patient remains alive without metastasis or local recurrence.</p> |
| Keywords | osteosarcoma bone transport reconstruction |
| Amo Type | Article |
| Published Date | 1998-02 |
| Publication Title | Acta Medica Okayama |
| Volume | volume52 |
| Issue | issue1 |
| Publisher | Okayama University Medical School |
| Start Page | 67 |
| End Page | 70 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | 英語 |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 9548997 |
| Web of Science KeyUT | 000072264100010 |
| JaLCDOI | 10.18926/AMO/31335 |
|---|---|
| FullText URL | fulltext.pdf |
| Author | Ozaki, Toshifumi| Nakatsuka, Yoichi| Kawai, Akira| Akazawa, Hirofumi| Kunisada, Toshiyuki| Inoue, Hajime| |
| Abstract | <p>There are few reports on skeletal reconstruction using the bone transport technique to repair bone defects caused by resections of tumors associated with osteosarcoma. We attempted to reconstruct a 23 cm bone defect after resection of an osteosarcoma of the left femur, and succeeded in gaining 17 cm by bone transport. Five years after surgery, this patient remains alive without metastasis or local recurrence.</p> |
| Keywords | osteosarcoma bone transport reconstruction |
| Amo Type | Article |
| Published Date | 1998-02 |
| Publication Title | Acta Medica Okayama |
| Volume | volume52 |
| Issue | issue1 |
| Publisher | Okayama University Medical School |
| Start Page | 67 |
| End Page | 70 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | 英語 |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 9548997 |
| Web of Science KeyUT | 000072264100010 |
| Author | Ito, Tatsuo| Ouchida, Mamoru| Morimoto, Yuki| Yoshida, Aki| Jitsumori, Yoshimi| Ozaki, Toshifumi| Sonobe, Hiroshi| Inoue, Hajime| Shimizu, Kenji| |
|---|---|
| Published Date | 2005-06-28 |
| Publication Title | Cancer Letters |
| Volume | volume224 |
| Issue | issue2 |
| Content Type | Journal Article |
| Author | 尾﨑 敏文| |
|---|---|
| Published Date | 2006-01-04 |
| Publication Title | 岡山医学会雑誌 |
| Volume | volume117 |
| Issue | issue3 |
| Content Type | Journal Article |
| JaLCDOI | 10.18926/AMO/30758 |
|---|---|
| FullText URL | fulltext.pdf |
| Author | Tanaka, Masato| Nakahara, Shinnosuke| Ito, Yauo| Nakanishi, Kazuo| Sugimoto, Yoshihisa| Ikuma, Hisanori| Ozaki, Toshifumi| |
| Abstract | <p>The purpose of this study was to investigate the surgical outcomes and to determine indicators of the necessity of surgical intervention. Twelve consecutive patients harboring symptomatic sacral perineural cysts were treated between 1995 and 2003. All patients were assessed for neurological deficits and pain by neurological examination. Magnetic resonance of imaging, computerized tomography, and myelography were performed to detect signs of delayed filling of the cysts. We performed a release of the valve and imbrication of the sacral cysts with laminectomies in 8 cases or recapping laminectomies in 4 cases. After surgery, symptoms improved in 10 (83%) of 12 patients, with an average follow-up of 27 months. Ten patients had sacral perineural cysts with signs of positive filling defect. Two (17%) of 12 patients experienced no significant improvement. In one of these patients, the filling defect was negative. In conclusion, a positive filling defect may become an indicator of good treatment outcomes.</p> |
| Keywords | Tarlov cyst sacral perineural cyst meningeal cyst meningeal diverticulum sacral radiculopathy |
| Amo Type | Article |
| Published Date | 2006-02 |
| Publication Title | Acta Medica Okayama |
| Volume | volume60 |
| Issue | issue1 |
| Publisher | Okayama University Medical School |
| Start Page | 65 |
| End Page | 70 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | 英語 |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 16508691 |
| Web of Science KeyUT | 000235538900008 |
| JaLCDOI | 10.18926/AMO/30749 |
|---|---|
| FullText URL | fulltext.pdf |
| Author | Komiyama, Takamitsu| Nishida, Keiichiro| Yorimitsu, Masanori| Doi, Hideyuki| Miyazawa, Shinichi| Kitamura, Ai| Yoshida, Aki| Nasu, Yoshihisa| Abe, Nobuhiro| Ozaki, Toshifumi| |
| Abstract | Ossification disturbance in femoral head reportedly is seen in the Spontaneously Hypertensive rats (SHR) between ages of 10 and 20 weeks. We investigated serum and tissue levels of insulin-like growth factor-1 (IGF-1) and vascular endothelial growth factor (VEGF) in SHR relevant to the ossification disturbance and osteonecrosis of the femoral head. Serum levels of IGF-1 and VEGF were significantly lower in SHR than in Wistar Kyoto rats (WKY) at weeks 5, 10, 15 and 20 (p<0.005). The incidence of histological ossification disturbance of the femoral head was higher in SHR (59%) than in WKY (40%) at week 20. Lower serum and local levels of VEGF in SHR appeared to be related to the incomplete ossification of the femoral heads. Immunohistochemical study showed significantly lower numbers of IGF-1 and VEGF positive chondrocytes in the femoral epiphyseal cartilage of SHR than in those of WKY at weeks 10, 15 and 20. Our results suggest that local and/or systemic levels of IGF-1 and VEGF between ages of 5 and 20 weeks might play roles in the pathogenesis of ossifi cation disturbance of the femoral head in SHR. |
| Keywords | spontaneous hypertensive rats insulin like growth factor-1 vascular endothelial growth factor ossification disturbance osteonecrosis |
| Amo Type | Article |
| Published Date | 2006-06 |
| Publication Title | Acta Medica Okayama |
| Volume | volume60 |
| Issue | issue3 |
| Publisher | Okayama University Medical School |
| Start Page | 141 |
| End Page | 148 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | 英語 |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 16838042 |
| Web of Science KeyUT | 000238503600001 |
| JaLCDOI | 10.18926/AMO/30739 |
|---|---|
| FullText URL | fulltext.pdf |
| Author | Aiga, Ayako| Asaumi, Koji| Lee, You Jin| Kadota, Hiroaki| Mitani, Shigeru| Ozaki, Toshifumi| Takigawa, Masaharu| |
| Abstract | The localization and expression of neurotrophins and their receptors during distraction osteogenesis was investigated in 72 male rat femurs (11 weeks old) to further clarify the concurrence of cellular and molecular events of new bone formation. After osteotomy, a 7-day lag phase was followed by distraction at the rate of 0.25 mm/12 h for 21 days (distraction phase), and a 7-day consolidation phase. The localization of neurotrophins (NGF, BDNF and NT-3) and their receptors tropomyosinrelated kinases (TRKA, TRKB and TRKC) by immunostaining showed positive staining in bone forming cells in each stage, although the presence and staining intensity varied by cell type and phase. The expressions of NGF, BDNF and NT-3 by real-time polymerase chain reaction (real-time PCR) showed that the peak of the mRNA expression of NGF occurred 10 days after distraction. NT-3 increased during bone extension, but decreased when distraction stopped. In contrast, BDNF continued to increase gradually throughout the distraction and consolidation phases. These findings suggest that neurotrophins and their receptors may play different roles in endochondral and intramembranous ossification in distraction osteogenesis. The tension stress caused by distraction may stimulate the expression of neurotrophins and their receptors, and promote osteogenesis. |
| Keywords | neurotrophin Trk distraction osteogenesis mechanical stress |
| Amo Type | Article |
| Published Date | 2006-10 |
| Publication Title | Acta Medica Okayama |
| Volume | volume60 |
| Issue | issue5 |
| Publisher | Okayama University Medical School |
| Start Page | 267 |
| End Page | 277 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | 英語 |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 17072373 |
| Web of Science KeyUT | 000241509000003 |
| JaLCDOI | 10.18926/AMO/30721 |
|---|---|
| FullText URL | fulltext.pdf |
| Author | Inoue, Atsushi| Asaumi, Koji| Endo, Hirosuke| Fujiwara, Kazuo| Mitani, Shigeru| Ozaki, Toshifumi| |
| Abstract | The present retrospective study assessed radiographs to determine socket wear in total hip arthroplasty (THA) with 22-mm zirconia or COP (Cobalt-Chrome alloy rich in Cobalt and Phosphorous) heads, and in cemented stems at more than 10 years after operation. Sockets of ultra high molecular weight polyethylene were used in each of two THA groups (13 hips each) in a clinical trial in our hospital between 1989 and 1990. Three observers carried out masked assessments of the radiographs. Upon fi nal examination, there was no remarkable loosening in the zirconia or COP group, and no case had required revision surgery as of 2005. There was a statistically signifi cant diff erence between the 2 groups in average annual linear wear, at 0.093 mm/year and 0.046 mm/year in the zirconia and COP groups, respectively. Volume wear and average annual volume wear were also signifi cantly greater in the zirconia group despite its superior mechanical strength and toughness in vitro. Our present fi ndings do not confi rm early expectations of lower wear in long-term results of 22-mm zirconia femoral heads used in THA. |
| Keywords | total hip arthroplasty zirconia head COP head polyethylene wear |
| Amo Type | Original Article |
| Published Date | 2006-12 |
| Publication Title | Acta Medica Okayama |
| Volume | volume60 |
| Issue | issue6 |
| Publisher | Okayama University Medical School |
| Start Page | 311 |
| End Page | 318 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | 英語 |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 17189974 |
| Web of Science KeyUT | 000243019000002 |
| JaLCDOI | 10.18926/AMO/32889 |
|---|---|
| FullText URL | fulltext.pdf |
| Author | Nakanishi, Kazuo| Tanaka, Masato| Sugimoto, Yoshihisa| Ozaki, Toshifumi| |
| Abstract | <p>We performed fixation using laminar screws in 2 patients in whom lateral mass screws, pedicle screws or transarticular screws could not be inserted. One was a 56-year-old woman who had anterior atlantoaxial subluxation (AAS). When a guide wire was inserted using an imaging guide, the hole bled massively. We thought the re-insertion of a guide wire or screw would thus increase the risk of vascular injury, so we used laminar screws. The other case was an 18-year-old man who had a hangman fracture. Preoperative magnetic resonance angiography showed occlusion of the left vertebral artery. A laminar screw was inserted into the patent side (i.e., the right side of C2). Cervical pedicle screws are the most biomechanically stable screws. However, their use carries a high risk of neurovascular complications during screw insertion, because the cervical pedicle is small and is adjacent laterally to the vertebral artery, medially to the spinal cord, and vertically to the nerve roots. Lateral mass screws are also reported to involve a risk of neurovascular injuries. The laminar screw method was thus thought to be useful, since arterial injuries could thus be avoided and it could also be used as a salvage modality for the previous misinsertion.</p> |
| Keywords | laminar screw neurovascular complications lateral mass screw pedicle screw transarticular |
| Amo Type | Case Report |
| Published Date | 2007-04 |
| Publication Title | Acta Medica Okayama |
| Volume | volume61 |
| Issue | issue2 |
| Publisher | Okayama University Medical School |
| Start Page | 115 |
| End Page | 119 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | 英語 |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 17471313 |
| Web of Science KeyUT | 000245875600010 |
| JaLCDOI | 10.18926/AMO/30956 |
|---|---|
| FullText URL | fulltext.pdf |
| Author | Doi, Hideyuki| Nishida, Keiichiro| Yorimitsu, Masanori| Komiyama, Takamitsu| Kadota, Yasutaka| Tetsunaga, Tomonori| Yoshida, Aki| Kubota, Satoshi| Takigawa, Masaharu| Ozaki, Toshifumi| |
| Abstract | <p>Mechanical stress plays a key role in the pathogenesis of cartilage destruction seen in osteoarthritis (OA). We investigated the effect of cyclic tensile stress (CTS) on the anabolic and catabolic gene expression of rat cultured normal chondrocytes using the Flexercell strain unit. The effects of interleukin (IL)-4, a chondroprotective cytokine, on the changes in gene expression induced by CTS were also investigated. CTS (7% elongation at 0.5 Hz) for 24 h did not affect the expression of aggrecan and type II collagen, whereas CTS significantly upregulated matrix metalloproteinase (MMP)-13 and cathepsin B mRNA expression by chondrocytes. IL-1beta expression was also signifi cantly upregulated by CTS up to 12 h. The upregulation of MMP-13 was observed at 3 h, which was earlier than that of IL-1beta. Furthermore, pre-treatment with IL-4 (10 ng/ml) suppressed both MMP-13 and cathepsin B induction by mechanical stress, as well as CTS-induced IL-1beta expression. Our results suggest that IL-4 might have a therapeutic value in the treatment of OA by downregulation of mechanical stress-induced MMP-13 and cathepsin B expression by chondrocytes.</p> |
| Keywords | IL-4 MMP cathepsin B mechanical stress aggrecanase |
| Amo Type | Original Article |
| Published Date | 2008-04 |
| Publication Title | Acta Medica Okayama |
| Volume | volume62 |
| Issue | issue2 |
| Publisher | Okayama University Medical School |
| Start Page | 119 |
| End Page | 126 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | 英語 |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 18464888 |
| Web of Science KeyUT | 000255297600008 |
| Author | Kunisada, Toshiyuki| Ozaki, Toshifumi| |
|---|---|
| Published Date | 2008-05-01 |
| Publication Title | 岡山医学会雑誌 |
| Volume | volume120 |
| Issue | issue1 |
| Content Type | Journal Article |
| JaLCDOI | 10.18926/AMO/30974 |
|---|---|
| FullText URL | fulltext.pdf |
| Author | Ikuma, Hisanori| Abe, Nobuhiro| Uchida, Youichiro| Furumatsu, Takayuki| Fujiwara, Kazuo| Nishida, Keiichiro| Ozaki, Toshifumi| |
| Abstract | <p>Instability of the knee after the medial collateral ligament (MCL) injury is usually assessed with the manual valgus stress test, even though, in recent years, it has become possible to apply magnetic resonance imaging (MRI) to the assessment of the damage of the ligament. The valgus instability of 24 patients (12 isolated injuries and 12 multiple ligament injuries) who suffered MCL injury between 1993 and 1998 was evaluated with the Hughston and Eilers classification, which involves radiographic assessment under manual valgus stress to the injured knees. We developed a novel system for classifying the degree of injury to the MCL by calculating the percentage of injured area based on MRI and investigated the relationship between this novel MRI classification and the magnitude of valgus instability by the Hughston and Eilers classification. There was a significant correlation between the 2 classifications (p=0.0006). On the other hand, the results using other MRI based classification systems, such as the Mink and Deutsch classificaiton and the Petermann classification, were not correlated with the findings by the Hughston and Eilers classification in these cases (p0.05). Since MRI is capable of assessing the injured ligament in clinical practice, this novel classification system would be useful for evaluating the stability of the knee and choosing an appropriate treatment following MCL injury.</p> |
| Keywords | medial collateral ligament magnetic resonance imaging knee instability novel method |
| Amo Type | Original Article |
| Published Date | 2008-06 |
| Publication Title | Acta Medica Okayama |
| Volume | volume62 |
| Issue | issue3 |
| Publisher | Okayama University Medical School |
| Start Page | 185 |
| End Page | 191 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | 英語 |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 18596835 |
| Web of Science KeyUT | 000257130300006 |
