1
|
Yokoya S, Harada Y, Sumimoto Y, Kikugawa K, Natsu K, Nakamura Y, Nagata Y, Negi H, Watanabe C, Adachi N. Factors affecting stress shielding and osteolysis after reverse shoulder arthroplasty: A multicenter study in a Japanese population. J Orthop Sci 2024; 29:521-528. [PMID: 36710212 DOI: 10.1016/j.jos.2023.01.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2022] [Revised: 12/11/2022] [Accepted: 01/05/2023] [Indexed: 01/29/2023]
Abstract
BACKGROUND Stress shielding and osteolysis around the humeral stem after reverse shoulder arthroplasty causes loosening and periprosthetic fractures and reduces bone stock during revision surgery. In Japanese patients, who have relatively small bodies, different characteristics may exist regarding the occurrence of these changes compared with the characteristics of Westerners, who have relatively larger frames. The purpose of this multicenter study was to investigate the incidence and clarify the predictors of stress shielding and osteolysis in Japanese individuals who underwent reverse shoulder arthroplasty. METHODS The occurrence of stress shielding and osteolysis was investigated in 135 shoulders that had undergone reverse shoulder arthroplasty at least 2 years prior in five Japanese hospitals. During post-surgical follow-up, which was conducted every 3 months, the locations of the stress shielding occurrences, such as cortical thinning and osteopenia (which primarily occurred in zones 1, 2, and 7, where 1 is the greater tuberosity and 7 is the calcar part), spot weld, and condensation lines, were recorded. Cases without any abnormal findings on radiographs obtained up to ≥2 years after surgery were regarded as having no abnormalities. Finally, the predictors of cortical thinning and proximal humeral osteolysis were assessed using univariate and multivariate regression analyses. RESULTS Cortical thinning and osteopenia occurred in 68 shoulders, a condensation line occurred in 37 shoulders, and spot weld occurred in 23 shoulders. In particular, greater tuberosity and calcar osteolysis occurred in 40 and 47 shoulders, respectively. Long stem, cementless stem, and a larger proximal filling ratio were independent predictors of cortical thinning and osteopenia, whereas a cementless stem, larger metaphysis diameter, and a larger proximal filling ratio were associated with proximal humeral osteolysis. CONCLUSIONS The predictors of stress shielding and osteolysis included the use of long stems, cementless stems, larger proximal filling ratios, and larger metaphysis diameters. LEVEL OF EVIDENCE retrospective comparative study (Level III).
Collapse
Affiliation(s)
- Shin Yokoya
- Department of Orthopaedic Surgery, Graduate School of Biomedical & Health Sciences, Hiroshima University, Japan.
| | - Yohei Harada
- Department of Orthopaedic Surgery, Graduate School of Biomedical & Health Sciences, Hiroshima University, Japan
| | - Yasuhiko Sumimoto
- Department of Orthopaedic Surgery, Graduate School of Biomedical & Health Sciences, Hiroshima University, Japan; Department of Orthopaedic Surgery, Mazda Hospital, Japan
| | | | - Koji Natsu
- Department of Orthopaedic Surgery, Hiroshima City Hiroshima Citizens Hospital, Japan
| | | | - Yoshihiko Nagata
- Department of Orthopaedic Surgery, Hiroshima-Nishi Medical Center, Japan
| | - Hiroshi Negi
- Department of Orthopaedic Surgery, Hiroshima-Nishi Medical Center, Japan
| | | | - Nobuo Adachi
- Department of Orthopaedic Surgery, Graduate School of Biomedical & Health Sciences, Hiroshima University, Japan
| |
Collapse
|
2
|
Yokoya S, Harada Y, Negi H, Matsushita R, Matsubara N, Adachi N. Arthroscopic Rotator Cuff Repair With Muscle Advancement and Artificial Biodegradable Sheet Reinforcement for Massive Rotator Cuff Tears. Orthop J Sports Med 2020; 8:2325967120960166. [PMID: 33195719 PMCID: PMC7607773 DOI: 10.1177/2325967120960166] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 05/18/2020] [Indexed: 01/08/2023] Open
Abstract
Background Because high failure rates have frequently been reported after arthroscopic rotator cuff repair (ARCR) of massive rotator cuff tears (mRCTs), we introduced the technique of ARCR with supraspinatus and infraspinatus muscle advancement (MA). However, for cases where the original footprint cannot be completely covered, additional surgery using an approved artificial biomaterial is performed. Purpose To investigate the postoperative clinical outcomes and failure rate after MA-ARCR, with and without our reinforcement technique. Study Design Cohort study; Level of evidence, 3. Methods A total of 74 patients (mean ± SD age, 68.7 ± 7.7 years) diagnosed with mRCT with a minimum postoperative follow-up of 2 years were included in the current study. Of these patients, 47 underwent MA-ARCR with polyglycolic acid (PGA) sheet reinforcement (study group), and 27 patients underwent MA-ARCR alone (control group). PGA reinforcement was performed when full coverage of the footprint could not be achieved by MA alone, but where the latter was possible, reinforcement was not required. Thus, the study group had significantly worse muscle quality than the control group (P < .05). The pre- and postoperative range of motion (ROM), isometric muscle strength, acromiohumeral interval, and clinical outcomes were evaluated and compared between these 2 groups. Cuff integrity during the last follow-up period was assessed with magnetic resonance imaging, and the failure rate was calculated. In addition, the postoperative foreign body reaction was investigated in the study group. Results In both groups, significant postoperative improvements were seen in acromiohumeral interval, clinical scores, ROM in anterior flexion, and isometric muscle strength in abduction, external rotation, and internal rotation (P < .001 for all). The failure rate of the study group was 12.8% (6 patients) and that of the control group was 25.9% (7 patients). No significant differences were noted between the 2 groups on any of the data findings, even regarding the failure rate. Foreign body reactions in the early period were found in 3 patients, although these spontaneously disappeared within 3 months. Conclusion Patients who underwent PGA patch reinforcement for MA-ARCR when the footprint could not be completely covered had clinical results similar to isolated MA-ARCR when the footprint could be covered. Both procedures resulted in significant improvement in symptoms and function compared with preoperatively.
Collapse
Affiliation(s)
- Shin Yokoya
- Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Yohei Harada
- Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Hiroshi Negi
- Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Ryosuke Matsushita
- Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Norimasa Matsubara
- Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Nobuo Adachi
- Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| |
Collapse
|
3
|
Negi H, Takeuchi S, Kamei N, Yanada S, Adachi N, Ochi M. In Vitro Safety and Quality of Magnetically Labeled Human Mesenchymal Stem Cells Preparation for Cartilage Repair. Tissue Eng Part C Methods 2019; 25:324-333. [PMID: 31002015 DOI: 10.1089/ten.tec.2019.0001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
IMPACT STATEMENT This study is very important for a preclinical assessment of the safety and quality of magnetically labeled mesenchymal stem cells (MSCs) for use in cartilage repair. The findings of this study show that magnetic labeling with an appropriate density of magnetic particles has no harmful effects on the safety and quality of MSCs.
Collapse
Affiliation(s)
- Hiroshi Negi
- 1 Department of Orthopaedic Surgery, Graduate School of Biomedical & Health Sciences, Hiroshima University, Hiroshima, Japan
| | | | - Naosuke Kamei
- 1 Department of Orthopaedic Surgery, Graduate School of Biomedical & Health Sciences, Hiroshima University, Hiroshima, Japan.,3 Medical Center for Translational and Clinical Research, Hiroshima University Hospital, Hiroshima, Japan
| | | | - Nobuo Adachi
- 1 Department of Orthopaedic Surgery, Graduate School of Biomedical & Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Mitsuo Ochi
- 4 Hiroshima University, Higashihiroshima, Japan
| |
Collapse
|
4
|
Shafiq N, Gautam V, Pandey AK, Kaur N, Garg S, Negi H, Kaur S, Ray P, Malhotra S. Authors' Response. Indian J Med Res 2018; 148:349-350. [PMID: 30425230 PMCID: PMC6251257 DOI: 10.4103/0971-5916.245302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Affiliation(s)
- Nusrat Shafiq
- Department of Pharmacology, Postgraduate Institute of Medical Education & Research, Chandigarh 160 012, India
| | - Vikas Gautam
- Department of Medical Microbiology, Postgraduate Institute of Medical Education & Research, Chandigarh 160 012, India
| | - A K Pandey
- Department of Pharmacology, Postgraduate Institute of Medical Education & Research, Chandigarh 160 012, India
| | - Navjot Kaur
- Department of Pharmacology, Postgraduate Institute of Medical Education & Research, Chandigarh 160 012, India
| | - Shubha Garg
- Department of Medical Microbiology, Postgraduate Institute of Medical Education & Research, Chandigarh 160 012, India
| | - H Negi
- Department of Pharmacology, Postgraduate Institute of Medical Education & Research, Chandigarh 160 012, India
| | - Sharonjeet Kaur
- Department of Pharmacology, Postgraduate Institute of Medical Education & Research, Chandigarh 160 012, India
| | - Pallab Ray
- Department of Medical Microbiology, Postgraduate Institute of Medical Education & Research, Chandigarh 160 012, India
| | - S Malhotra
- Department of Pharmacology, Postgraduate Institute of Medical Education & Research, Chandigarh 160 012, India
| |
Collapse
|
5
|
Negi H, Tamura M, Kawai T, Yoda I, Kawasaki T, Hirata T, Sugimura Y, Okada S, Yamamoto M. The Development and Practical Use of Information Systems in the Pharmaceutical Industry. Methods Inf Med 2018. [DOI: 10.1055/s-0038-1634955] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
AbstractTo provide information on the efficacy, safety, and quality of medicine promptly and accurately, we have developed two databases: a literature database with numerical data, and a Drug Information database. By an easy-to-use, company-wide information network system, over 1,000 medical representatives in more than 80 offices throughout Japan can retrieve information. Information derived from the system is displayed on the terminal and the original documents are automatically output through a facsimile.
Collapse
|
6
|
Negi H, Negi H, Yokoya S, Shiraishi K, Matsushita R, Adachi N, Ochi M. Can radial-sequence magnetic resonance imaging evaluate delamination of posterior part of infraspinatus tendon ? Asia Pac J Sports Med Arthrosc Rehabil Technol 2017. [DOI: 10.1016/j.asmart.2017.05.246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
|
7
|
Guo H, Zhu Q, Yu X, Merugu SB, Mangukiya HB, Smith N, Li Z, Zhang B, Negi H, Rong R, Cheng K, Wu Z, Li D. Tumor-secreted anterior gradient-2 binds to VEGF and FGF2 and enhances their activities by promoting their homodimerization. Oncogene 2017; 36:5098-5109. [DOI: 10.1038/onc.2017.132] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Revised: 03/18/2017] [Accepted: 03/27/2017] [Indexed: 12/11/2022]
|
8
|
Negi H, Yokoya S, Harada Y, Shiraishi K, Matsushita R, Adachi N, Ochi M. Long head of biceps tenotomy and tenodesis don’t affect elbow flexion and forearm supination strength. Asia Pac J Sports Med Arthrosc Rehabil Technol 2016. [DOI: 10.1016/j.asmart.2016.07.171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
|
9
|
Yokoya S, Harada Y, Shiraishi K, Negi H, Matsushita R, Mochizuki Y, Adachi N, Ochi M. Outcomes of arthroscopic rotator cuff repair with less tension. Asia Pac J Sports Med Arthrosc Rehabil Technol 2016. [DOI: 10.1016/j.asmart.2016.07.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
|
10
|
Raval AD, Thakker D, Negi H, Vyas A, Kaur H, Salkini MW. Association between statins and clinical outcomes among men with prostate cancer: a systematic review and meta-analysis. Prostate Cancer Prostatic Dis 2016; 19:151-62. [PMID: 26782711 DOI: 10.1038/pcan.2015.58] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Revised: 10/11/2015] [Accepted: 11/08/2015] [Indexed: 12/24/2022]
Abstract
BACKGROUND Mixed evidence exists regarding the effects of statins among men with prostate cancer. We aimed to determine the association between statin use and clinical outcomes in prostate cancer using systematic review and meta-analysis. METHODS Original articles published until second week of August 2015 were searched in electronic databases (Medline-Ovid, Pubmed, Scopus, The Cochrane Library, Web of Science, ProQuest) for studies on statin use in prostate cancer. The main clinical outcomes for the review were: biochemical recurrence (BCR), metastases, and all-cause and prostate cancer-specific mortality. Meta-analysis was performed to calculate the pooled hazard ratio (pHR) and their 95% confidence interval (95% CI). Heterogeneity between the studies was examined using I(2) statistics. Meta-regression was performed, wherever significant heterogeneity was found in the meta-analyses, to find factors associated with poor outcomes, and sensitivity analyses were conducted to assess the robustness of findings. The analyses were conducted using RevMan v5.3, STATA v14, and R v3.1.1. RESULTS Out of the 1002 retrieved citations, 34 observational cohort studies met the inclusion criteria. Statin use was associated with a 21% reduction in the risk of BCR among those treated with radiation therapy (pHR: 0.79, 95% CI: 0.65, 0.95, P-value=0.01, 10 studies, I(2)=54%), whereas it was not associated with the BCR among those treated with radical prostatectomy (pHR: 0.94, 95% CI: 0.81, 1.09, P-value=0.43, 15 studies, I(2)=65%). Statin use was associated with a 22% reduction in the risk of metastases (pHR: 0.78, 95% CI: 0.68, 0.87, P-value<0.001, 6 studies, I(2)=0%), and a 24% reduction in risk of both all-cause mortality (pHR: 0.76, 95% CI: 0.63, 0.91, P-value=0.004, 6 studies, I(2)=71%), and prostate cancer-specific mortality (pHR: 0.76, 95% CI: 0.64, 0.89, P-value=0.0007, 5 studies, I(2)=40%). CONCLUSIONS Our systematic review found that statin significantly reduced the all-cause and prostate cancer-specific mortality and improved the BCR in certain subgroup of men with prostate cancer. In future, randomized controlled trials should be conducted to establish efficacy of statins among men with prostate cancer.
Collapse
Affiliation(s)
- A D Raval
- Department of Pharmaceutical Systems and Policy, School of Pharmacy, West Virginia University, Morgantown, WV, USA.,Healthcore, Inc., Wilmington, DE, USA
| | - D Thakker
- Health Outcomes Research, Capita India, Mumbai, India
| | - H Negi
- Department of Pharmacology, Post-Graduate Medical Education and Research Institute (PGIMER), Chandigarh, India
| | - A Vyas
- Department of Epidemiology, School of Public Health, Rutgers, the State University of New Jersey, Piscataway, NJ, USA
| | - H Kaur
- Department of Hospital Medicine, Cleveland Clinic, Cleveland, OH, USA
| | - M W Salkini
- Department of Urology, School of Medicine, West Virginia University, Morgantown, WV, USA
| |
Collapse
|
11
|
Negi H, Sarkar M, Raval AD, Pandey K, Das P. Health-related quality of life in patients with chronic obstructive pulmonary disease in North India. J Postgrad Med 2015; 60:7-11. [PMID: 24625932 DOI: 10.4103/0022-3859.128797] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
BACKGROUND AND OBJECTIVES Chronic obstructive pulmonary disease (COPD) is a major health problem in India and constitutes an important cause of mortality and morbidity. A cross-sectional study was undertaken to assess health-related quality of life (HRQL) and its determinants in patients with COPD from India. MATERIALS AND METHODS A total of 126 patients (73.81% male) were enrolled using convenient sampling prospectively in this cross-sectional study. Eligible patients were assessed for socioeconomic status, anthropometric measures, COPD severity, dyspnea and health status using the Hindi version of St George's Respiratory Questionnaire (SGRQ). Linear regression model was used to examine the association between risk factors and HRQL score (a higher score indicating poorer HRQL), adjusting for age and sex. RESULTS The mean total score for SGRQ in the patients was 52.66 ± 12.89, indicating a marked impairment of HRQL. Impairment was associated with the severity of airway obstruction, but within each Global Initiative for Chronic Obstructive Lung Disease (GOLD) stage, the variation (SD) was wide [stage I: 47.8 ± 12.3 (n = 14); stage II: 49.28 ± 11.69 (n = 47); stage III: 53.47 ± 11.69 (n = 44); stage IV: 61.75 ± 14.14 (n = 21)]. A regression analysis showed that body mass index, forced expiratory volume in 1 s (FEV 1 ), dyspnea grade, and depression were associated with poor HRQL. CONCLUSION HRQL of COPD patients was significantly impaired across stages. Marked impairment of HRQL was found even in patients with mild disease.
Collapse
Affiliation(s)
- H Negi
- Department of Pharmacy Practice, National Institute of Pharmaceutical Education and Research, Hajipur, India
| | | | | | | | | |
Collapse
|
12
|
Hattori Y, Iriyama T, Watanabe K, Negi H, Yamashita M, Takeda I, Sugimura H, Hoshino R, Yamamoto T, Sugimura S. [Effect of body temperature on changes in the blood Il-6 and IL-8 concentrations during open heart surgery]. Nihon Geka Gakkai Zasshi 1999; 100:361. [PMID: 10475793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
|
13
|
Yamamoto M, Onaka Y, Sakakibara K, Negi H, Funabashi S, Hirata T, Kawasaki T, Saito H, Kawai T, Okada S. Development and utilization of a drug information system in the Japanese pharmaceutical industry. Med Inform (Lond) 1998; 23:31-41. [PMID: 9618681 DOI: 10.3109/14639239809001389] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Pharmaceutical companies are responsible for providing updated, relevant information on the efficacy, safety and quality of drugs to medical professionals and finally to patients. To fulfill this responsibility, we must always endeavour to collect and evaluate the relevant information. We developed a drug information database system called Advanced Medical Online Network of Daiichi (AMOND) to manage various information generated during development of new products and after launch of the products using the classification format for retrieval. This system has been used for 9 years for the purpose of supporting medical representatives who play a primary role in the drug information services in the pharmaceutical industry. This system is incorporated into an on-line network system, and can be directly accessed by more than 1200 people at 11 branch offices and more than 110 subbranches all over the country. We upgraded this system to AMOND-II to improve the function, including retrieval and output abilities. As a result, utilization by users of this system increased six times. We report on the improved system, AMOND-II and our experience of the system.
Collapse
Affiliation(s)
- M Yamamoto
- PMS Administration Department, Daiichi Pharmaceutical Co., Ltd., Tokyo, Japan
| | | | | | | | | | | | | | | | | | | |
Collapse
|
14
|
Yamamoto M, Negi H, Tamura M, Kawai T, Yoda I, Kawasaki T, Hirata T, Sugimura Y, Okada S. The development and practical use of information systems in the pharmaceutical industry. Methods Inf Med 1993; 32:400-6. [PMID: 8295548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
To provide information on the efficacy, safety, and quality of medicine promptly and accurately, we have developed two databases: a literature database with numerical data, and a Drug Information database. By an easy-to-use, company-wide information network system, over 1,000 medical representatives in more than 80 offices throughout Japan can retrieve information. Information derived from the system is displayed on the terminal and the original documents are automatically output through a facsimile.
Collapse
Affiliation(s)
- M Yamamoto
- Medical Information Department, Daiichi Pharmaceutical Co, Tokyo, Japan
| | | | | | | | | | | | | | | | | |
Collapse
|
15
|
Yamamura H, Taira M, Negi H, Nanbu F, Kohno SW, Ohata K. Effect of AA-861, a selective 5-lipoxygenase inhibitor, on models of allergy in several species. Jpn J Pharmacol 1988; 47:261-71. [PMID: 2464711 DOI: 10.1254/jjp.47.261] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The effects of 2,3,5-trimethyl-6-(12-hydroxy-5,10-dodecadiynyl)-1,4-benzoquinone (AA-861), a selective 5-lipoxygenase inhibitor, on immunological or non-immunological release of slow reacting substance of anaphylaxis (SRS-A) and histamine and its effects on experimental asthma were investigated. AA-861 showed a dose-dependent inhibition of SRS-A release, with no effect on histamine release from passively sensitized guinea pig, monkey (M. irus) and human lung fragments. An analysis of the anaphylactic diffusate from the human lung fragments, using the combined technique of high performance liquid chromatography and radioimmunoassay, revealed that AA-861 markedly suppresses biosynthesis of the leukotrienes. However, this drug inhibits the release of histamine as well as SRS-A from lung fragments of anaphylactic monkey (M. mulatta) and in the Ca ionophore-stimulated rat peritoneal cavity. AA-861 suppressed the anaphylactically-induced airway resistance in mepyramine- and cimetidine-treated guinea pigs. These results suggest that AA-861 may be clinically effective for treating allergy-related asthma by modulating the 5-lipoxygenase pathway and that an inhibitory mechanism of histamine release by AA-861 may be present in some species.
Collapse
Affiliation(s)
- H Yamamura
- Department of Pharmacology, Kyoto Pharmaceutical University, Japan
| | | | | | | | | | | |
Collapse
|