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Okinaka T, Fujimura K, Hamasaki Y, Hasegawa Y, Matono T. Significance of early diagnosis and surgical management in treating Mycobacterium immunogenum-related pyogenic extensor tenosynovitis: a case report. BMC Infect Dis 2024; 24:395. [PMID: 38609847 PMCID: PMC11010399 DOI: 10.1186/s12879-024-09249-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Accepted: 03/24/2024] [Indexed: 04/14/2024] Open
Abstract
BACKGROUND Non-tuberculous mycobacteria (NTM) are environmental organisms that are increasingly contributing to human infections. Mycobacterium immunogenum, a variant of NTM discovered in 2001, is a rapidly growing mycobacterium that exhibits multidrug resistance. Reports of infections caused by this organism, particularly tenosynovitis in the musculoskeletal system, are limited. CASE PRESENTATION A 71-year-old female with vesicular pemphigus, undergoing immunosuppressive therapy, presented with a progressively enlarging tumour on the dorsum of her right hand, along with erythematous papules that extended across her right forearm. The specimens of skin tissues and blood cultures revealed the presence of M. immunogenum. Magnetic resonance imaging evaluation led to the diagnosis of pyogenic extensor tenosynovitis. A multidrug regimen, comprising amikacin and clarithromycin, was initiated, followed by synovectomy. The patient underwent a course of 180 days of antimicrobial therapy and demonstrated no signs of disease recurrence one year after treatment completion. CONCLUSION Early diagnosis and surgical intervention are crucial to prevent the adverse prognostic implications of pyogenic extensor tenosynovitis caused by M. immunogenum. Effective management requires precise microbial identification and susceptibility testing, necessitating collaborative engagement with microbiological laboratories.
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Affiliation(s)
- Tomohide Okinaka
- Department of Infectious Diseases, Aso Iizuka Hospital, Iizuka, Fukuoka, Japan
| | - Kenjiro Fujimura
- Department of Orthopedic Surgery, Aso Iizuka Hospital, Fukuoka, Japan
| | - Yuka Hamasaki
- Department of Dermatology, Inatsuki Hospital, Fukuoka, Japan
| | - Yuichi Hasegawa
- Department of Infectious Diseases, Aso Iizuka Hospital, Iizuka, Fukuoka, Japan
| | - Takashi Matono
- Department of Infectious Diseases, Aso Iizuka Hospital, Iizuka, Fukuoka, Japan.
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Okinaka T, Fukumitsu K, Okamura N, Wang L, Ohishi Y, Miyazaki Y, Matono T. Minocycline-Induced Hyperpigmentation: Importance of Early Diagnosis. IDCases 2023; 34:e01901. [PMID: 37841948 PMCID: PMC10570587 DOI: 10.1016/j.idcr.2023.e01901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Accepted: 09/27/2023] [Indexed: 10/17/2023] Open
Abstract
A 75-year-old woman on hemodialysis for end-stage renal failure due to polycystic kidney disease developed dark spots on her limbs. She had been treated for extended spectrum beta-lactamase-producing Escherichia coli bacteremia by a rectovaginal fistula and was on long-term oral minocycline (cumulative dose 45 g). Physical examination revealed dark patches on her forearms and lower legs but no trunk hyperpigmentation or visual impairment. Blood tests were normal. Skin biopsy confirmed minocycline-induced hyperpigmentation. Minocycline-induced pigmentation is categorized into types I-IV, each with unique clinical and histopathological features. Types I and II are reversible upon discontinuing minocycline, whereas types III and IV are permanent. The patient was diagnosed with type II pigmentation, generally occurring with a cumulative dose exceeding 70-100 g; however, her lower dose (45 g) led to pigmentation, possibly influenced by her vitamin D deficiency. Clinicians should evaluate the antimicrobial indication and treatment period, considering not only the benefits but also the side effects and antimicrobial resistance. If minocycline is used, attention should be paid to minocycline-induced hyperpigmentation, and this possibility should be communicated to patients to enable early detection.
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Affiliation(s)
- Tomohide Okinaka
- Department of Infectious Diseases, Aso Iizuka Hospital, 3-83 Yoshio, Iizuka, Fukuoka 820-8505, Japan
| | - Kento Fukumitsu
- Department of Nephrology, Aso Iizuka Hospital, 3-83 Yoshio, Iizuka, Fukuoka 820-8505, Japan
| | - Nozomi Okamura
- Department of Nephrology, Aso Iizuka Hospital, 3-83 Yoshio, Iizuka, Fukuoka 820-8505, Japan
| | - Liya Wang
- Department of Dermatology, Kyusyu University Hospital, 3-1-1 Maide, Higashi-ku, Fukuoka City, Fukuoka 812-8582, Japan
| | - Yoshihiro Ohishi
- Department of Pathology, Aso Iizuka Hospital, 3-83 Yoshio, Iizuka, Fukuoka 820-8505, Japan
| | - Yoshiko Miyazaki
- Department of Pathology, Aso Iizuka Hospital, 3-83 Yoshio, Iizuka, Fukuoka 820-8505, Japan
| | - Takashi Matono
- Department of Infectious Diseases, Aso Iizuka Hospital, 3-83 Yoshio, Iizuka, Fukuoka 820-8505, Japan
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Matono T, Morita M, Nakao N, Teshima Y, Yamate R, Hijikata T, Hoashi K, Ohashi Y, Hasegawa Y, Okinaka T, Ohnishi M. 657. Genomic Insights into Virulence Factors Affecting a Tissue-invasive Klebsiella pneumoniae Infection. Open Forum Infect Dis 2021. [PMCID: PMC8643985 DOI: 10.1093/ofid/ofab466.854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Background Japan is one of the hypervirulent Klebsiella pneumoniae (hvKp) endemic areas, resulting in an alarming issue in actual clinical settings. However, little is known regarding key virulence factors responsible for hvKp infection. Methods We analyzed K. pneumoniae isolates collected between 2017 and 2019, and defined hvKp as a pyogenic infection. Classical K. pneumoniae (cKp) involved a non-invasive infection or uncomplicated bacteremia. Isolates belonging to the K. pneumoniae species complex were excluded. Results We analyzed 112 isolates, including 19 hvKp, 67 cKp, and 26 colonizers, by whole-genome sequencing. Population genomics revealed that the K1-sequence type (ST) 82 clade was distinct from that of K1-ST23 clone (Figure 1). The virulence-gene profiles also differed between K1-ST82 (aerobactin and rmpA) and K1-ST23 (aerobactin, yersiniabactin, salmochelin, colibactin, and rmpA/rmpA2). The K2 genotype was more diverse than that of K1. A neighboring subclade of K1-ST23 (comprising ST29, ST412, ST36, and ST268) showed multidrug-resistance and hypervirulence potentials. Logistic-regression analysis revealed that diabetes mellitus was associated with K. pneumoniae infection (odds ratio [OR]: 4.11; 95% confidence interval [CI]: 1.14–14.8). No significant association was found between hvKp diagnosis and clinical characteristics, such as diabetes mellitus or community acquisition (Table 1). The K1 genotype (OR: 9.02; 95% CI: 2.49–32.7; positive-likelihood ratio [LR]: 4.08), rmpA (OR: 8.26; 95% CI: 1.77–38.5; positive LR: 5.83), and aerobactin (OR: 4.59; 95% CI: 1.22–17.2; positive LR: 3.49) were substantial diagnostic predictors of hvKp (Table 2). Figure 1. Phylogenetic distribution of genetic virulence factors in 112 K. pneumoniae isolates ![]()
The highlighted strains are clinically pathogenic (orange, hypervirulent K. pneumoniae; yellow, classical K. pneumoniae; sky blue, colonization). The non-highlighted strain (NTUH-K2044) is a reference K. pneumoniae strain. ![]()
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Conclusion In hvKp-rich settings, diabetes mellitus, community-acquisition, and siderophores other than aerobactin were not remarkable predictors of hvKp infection. However, the K1 genotype, rmpA, and aerobactin were found to be substantial predictors, warranting clinical assessment of any possible/further pyogenic (metastatic) infection. We believe that these findings shed light on key hvKp virulence factors. Disclosures All Authors: No reported disclosures
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Affiliation(s)
| | - Masatomo Morita
- National Institute of Infectious Diseases, Shinjyuku, Tokyo, Japan
| | | | | | | | | | | | | | | | | | - Makoto Ohnishi
- National Institute of Infectious Diseases, Shinjyuku, Tokyo, Japan
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Komatsu M, Yamakuchi H, Okinaka T, Yaita K, Saeki H. [A Case of Vibrio vulnificus Infection Improved with Conservative Treatment in Kagoshima]. Kansenshogaku Zasshi 2017; 91:163-165. [PMID: 30277704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We herein report on a case of Vibrio vulnificus infection that was improved by conservative treatment in Kagoshima, Japan. A 75-year-old Japanese woman with liver cirrhosis presented to our hospital with shaking chill and right lower leg pain. Her blood culture was positive for V. vulnificus, and bullae had newly appeared on the right leg. Further history taking revealed that she had eaten some raw seafood before admission. She recovered following administration of antibiotics and small incisions in the lesion. West Japan (especially, the northern parts of Kyushu island) is well known as an endemic area of V. vulnificus infection: however, some cases had been reported in other areas in Japan. When clinicians treat cellulitis with risk factors, we should consider the possibility of V. vulnificus infection, even in a non-endemic area. Taking blood culture and early administration of appropriate antibiotics may contribute to conservative cure of some case of V. vulnificus infection.
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Kitamura T, Onishi K, Dohi K, Okinaka T, Ito M, Isaka N, Nakano T. Circadian rhythm of blood pressure is transformed from a dipper to a non-dipper pattern in shift workers with hypertension. J Hum Hypertens 2002; 16:193-7. [PMID: 11896509 DOI: 10.1038/sj.jhh.1001328] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2001] [Revised: 10/17/2001] [Accepted: 10/17/2001] [Indexed: 11/08/2022]
Abstract
Shift workers make great use of health care services because they are associated with increased cardiovascular morbidity and mortality. Whether the circadian rhythm of blood pressure rapidly adapts to shift work is controversial. It is unknown if shift work has adverse effects on blood pressure in patients with hypertension. To evaluate the effects of shift work, we examined 12 male shift workers with untreated hypertension aged 53.6 +/- 2.5 years. Twenty-four hour ambulatory blood pressure monitoring was performed three times as follows: the last day of a 4-day period of day shifts (09.00 to 21.00), the first day of a 4-day period of night shifts (21.00 to 09.00), and the fourth day of night shifts (21.00 to 09.00). Blood pressure at night-time dropped significantly in the day-shift workers, showing a dipper pattern. Average differences in blood pressure in the sleep-wake cycle were decreased by 8.5% at the beginning of night shift work showing a non-dipper pattern. After 4 days the pattern was completely reversed to a dipper pattern. The results indicate that the circadian blood pressure pattern is changed from a dipper to a non-dipper pattern on the first day of the night shift and reverses to a dipper pattern within a few days. We suggest that night shift work may have unfavourable effects on blood pressure in patients with hypertension.
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Affiliation(s)
- T Kitamura
- The First Department of Internal Medicine, Mie University School of Medicine, Tsu, Japan.
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Saito Y, Sakuma H, Shibata M, Okinaka T, Isaka N, Tomemori T, Takeda K, Nakano T, Higgins CB. Assessment of coronary flow velocity reserve using fast velocity-encoded cine MRI for noninvasive detection of restenosis after coronary stent implantation. J Cardiovasc Magn Reson 2002; 3:209-14. [PMID: 11816617 DOI: 10.1081/jcmr-100107469] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
PURPOSE Serial change of the coronary flow velocity reserve was evaluated with fast velocity-encoded cine magnetic resonance imaging (MRI) for noninvasive detection of restenosis after coronary stent implantation. METHOD In total, 60 MRI flow studies were performed in 10 patients with coronary artery disease who undersvent elective successful stent implantation to the lesion in the proximal left anterior descending artery. Flow velocities in the segment that was distal to the stent were measured before and after intravenous injection of dipyridamole. MRI measurements of coronary flow velocity reserve were repeated every 4 weeks for 6 months, and follow-up angiography was performed 6 months after the procedure. RESULTS In patients without restenosis (n = 7, % diameter stenosis: 27.8%+/-7.1) at follow-up angiography, the coronary flow velocity reserve remained normal during the 6-month follow-up time. The flow velocity reserve was 2.31+/-0.30 at 1 month and 2.52+/-0.25 at 6 months after stent implantation (p = NS). In contrast, the coronary flow velocity reserve showed a significant decrease after 4 months in patients with restenosis (n = 3, % diameter stenosis: 66.3%+/-8.1) at follow-up angiography. The flow velocity reserve was 2.26+/-0.49 at 1 month and 1.52+/-0.09 at 6 months after stent implantation (p < 0.05). CONCLUSION Fast velocity-encoded cine MRI is a technique that shows promise in providing non-invasive detection of restenosis of coronary stent implantation.
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Affiliation(s)
- Y Saito
- First Department of Internal Medicine, Mie University School of Medicine, Tsu-City, Japan
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Okinaka T, Nakano T. [Japanese statistics of arrhythmia]. Nihon Rinsho 2001; 59 Suppl 8:804-11. [PMID: 11808311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Affiliation(s)
- T Okinaka
- First Department of Internal Medicine, Mie University, School of Medicine
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Mizuno O, Onishi K, Dohi K, Motoyasu M, Okinaka T, Ito M, Isaka N, Nakano T. Effects of therapeutic doses of human atrial natriuretic peptide on load and myocardial performance in patients with congestive heart failure. Am J Cardiol 2001; 88:863-6. [PMID: 11676948 DOI: 10.1016/s0002-9149(01)01893-8] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The benefits of atrial natriuretic peptide (ANP) in patients with congestive heart failure (CHF) have been demonstrated. However, the myocardial actions of ANP remain unclear. Using relatively load-insensitive left ventricular pressure-volume analysis, the myocardial and load-altering actions of ANP in patients with moderate CHF were studied. After obtaining steady-state data using micromanometers and conductance catheters, ANP was infused in 9 patients with CHF at 0.01 and 0.1 microg/kg/min for 30 minutes, respectively. Hemodynamic variables, plasma ANP, and cyclic guanosine monophosphate (cGMP) levels were determined before and 30 minutes after each ANP infusion. ANP at 0.01 microg/kg/min increased plasma ANP and cGMP levels from 73 +/- 34 to 139 +/- 34 pg/ml and from 4 +/- 1 to 8 +/- 2 pmol/ml, respectively. ANP infusion caused a significant decrease in end-systolic pressure without any changes in heart rate. End-diastolic pressure was significantly decreased but there was no significant change in left ventricular end-diastolic volume. The time constant for isovolumetric relaxation was decreased. ANP infusion at 0.1microg/kg/min caused further decreases in end-systolic pressure, end-diastolic pressure and volume, and the time constant for isovolumetric relaxation (p <0.05) without any changes in heart rate. The slope of the end-systolic pressure-volume relation was increased from 1.3 +/- 0.2 to 1.6 +/- 0.3 mm Hg/ml (p <0.05), indicating increased contractility. Plasma ANP and cGMP levels were increased to 422 +/- 44 pg/ml and 16 +/- 3 pmol/ml, respectively. Thus, ANP infusion increased cGMP generation, decreased afterload and preload, and improved left ventricular systolic and diastolic function.
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Affiliation(s)
- O Mizuno
- The First Department of Internal Medicine, Mie University School of Medicine, Edobashi, Japan
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Isaka N, Yamada N, Araki S, Onishi K, Motoyasu M, Okinaka T, Ito M, Nakano T. Multiple pulmonary emboli with pulmonary hypertension caused by effort thrombosis and effective balloon venoplasty of the subclavian vein. Jpn Circ J 2001; 65:920-2. [PMID: 11665800 DOI: 10.1253/jcj.65.920] [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: 11/09/2022]
Abstract
A 36-year-old woman with effort thrombosis of the subclavian vein associated with multiple pulmonary emboli was successfully treated with local thrombolysis of the subclavian vein using a pulse-spray catheter and systemic anticoagulation. Balloon venoplasty of the residual stenosis of subclavian vein was carried out and in follow-up venography 6 months later, there was no restenosis, and the patient has been asymptomatic for 12 months. Pulmonary embolism is not a rare complication of upper extremity deep vein thrombosis and should be managed as aggressively as lower extremity deep vein thrombosis.
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Affiliation(s)
- N Isaka
- First Department of Internal Medicine, Mie University School of Medicine, Japan.
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Dohi K, Onishi K, Kitamura T, Okinaka T, Ito M, Isaka N, Nakano T. Functional role of endogenous endothelin-1 in congestive heart failure treated with angiotensin II receptor antagonist. Jpn J Physiol 2001; 51:445-53. [PMID: 11564281 DOI: 10.2170/jjphysiol.51.445] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Interactions between angiotensin (ANG) II and endothelin (ET)-1 receptor transduction pathways have been unclear in congestive heart failure (CHF). Therefore the objects of this study are, in CHF, whether production of ET-1 is modulated by ANG II and/or whether hemodynamic effects of endogenous ET-1 are modulated by ANG II. Twelve dogs were randomly assigned to two groups: untreated (n = 6) and treated with ANG II type 1 (AT1) receptor antagonist (TCV116, 1.5 mg/kg/d) (n = 6). After rapid ventricular pacing (240 bpm) for 4 weeks, plasma and cardiac ET-1 levels were compared between the two groups. Acute hemodynamic effects of a nonspecific ET(A&B) receptor antagonist, TAK044 (3 mg/kg plus 3 mg/kg/h i.v.) were examined in both groups by a conductance catheter and a micromanometer. After 4 weeks of pacing, plasma and cardiac tissue ET-1 levels were elevated in both groups to a similar degree. In the group treated with TCV116, TAK044 produced an increase in stroke volume and a decrease in total systemic resistance; heart rate was unchanged. The time constant of left ventricular (LV) relaxation was significantly decreased. The slope of LV end-systolic pressure-volume relation (E(ES)) was increased (p < 0.05), indicating an increased LV contractility. Thus endogenous ET-1 produces an arterial vasoconstriction and impairs LV contractility and relaxation in CHF with AT1 receptor antagonism. These hemodynamic responses to TAK044 in CHF treated with TCV116 were similar in untreated CHF. These results suggest that the production of ET-1 and the cardiac effects of endogenous ET-1 in CHF may be unaffected by ANG II acting through AT1 receptors.
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Affiliation(s)
- K Dohi
- The First Department of Internal Medicine, Mie University School of Medicine, Tsu, 514-8507, Japan
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Kitai T, Nishikawa M, Tanigawa T, Okinaka T, Wada H, Shiku H, Ikeda Y, Ito M, Isaka N, Nakano T. Inhibition by combined therapy with ticlopidine and aspirin of enhanced platelet aggregation during physical exercise in patients with coronary artery disease. Am Heart J 2001; 142:E1. [PMID: 11479480 DOI: 10.1067/mhj.2001.116485] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
BACKGROUND Strenuous exercise can be a major trigger for coronary thrombosis and it enhances platelet aggregation. METHODS We evaluated the effect of antiplatelet therapy on shear stress-induced platelet aggregation (SIPA), in addition to agonist-induced aggregation, before and immediately after ergometer exercise in patients with stable coronary artery diseases (CAD). Forty-eight patients with stable CAD were randomly distributed into 3 groups: no antiplatelet drug (patient control, n = 16), aspirin (ASA) monotherapy (n = 16), and combined therapy with ticlopidine (TIC) and ASA (n = 16). RESULTS There were significant increases in not only adenosine phosphate (ADP)- and collagen-induced platelet aggregation but also in SIPA during exercise by the patient control group. ASA monotherapy did not attenuate the enhanced ADP-induced aggregation nor SIPA. Combined ASA + TIC therapy significantly inhibited SIPA as well as ADP-induced aggregation both before and after exercise. Significant increases in levels of plasma von Willebrand factor (vWF) occurred during exercise, and these antiplatelet therapies had no apparent effect on increased vWF levels during exercise. Exercise induced a significant increase in the plasma thrombin-antithrombin III complex level with no significant changes in the level of plasmin-plasmin inhibitor complex level in all 3 groups. CONCLUSIONS Combined therapy with ASA + TIC effectively inhibited increased platelet aggregability in response to acute exercise, with no effects on coagulant or fibrinolytic potentials in patients with CAD. The data suggest that TIC combined with ASA may be superior to ASA alone in preventing acute coronary events during exercise in patients with coronary atherosclerotic disease.
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Affiliation(s)
- T Kitai
- 1st and 2nd Departments of Internal Medicine, Mie University School of Medicine, Tsu, Mie, Japan
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Abstract
Aneurysms of the coronary sinuses of Valsalva and coronary artery aneurysms are uncommon cardiac anomalies, and cases in which these two uncommon lesions occur at the same time are extremely rare. A case of a woman with unstable angina who had a giant aneurysm of the left coronary sinus and multiple coronary artery aneurysms associated with an idiopathic hypereosinophilic syndrome is presented. Her sustained eosinophilia, elevated eosinophilic cationic protein concentration, and pathological findings of eosinophil infiltration of the aortic wall suggested the association of eosinophilia induced vascular injury as the cause of these aneurysms. This is the first such case to survive following surgical treatment.
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Affiliation(s)
- T Okinaka
- First Department of Internal Medicine, Mie University School of Medicine, 2-174 Edobashi, Tsu, Mie 514-8507, Japan.
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Tanigawa T, Nishikawa M, Kitai T, Ueda Y, Okinaka T, Makino K, Ito M, Isaka N, Ikeda Y, Shiku H, Nakano T. Increased platelet aggregability in response to shear stress in acute myocardial infarction and its inhibition by combined therapy with aspirin and cilostazol after coronary intervention. Am J Cardiol 2000; 85:1054-9. [PMID: 10781751 DOI: 10.1016/s0002-9149(00)00695-0] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Although antiplatelet therapy with a specific inhibitor of phosphodiesterase-3 cilostazol improves stent patency compared with use of aspirin (ASA) alone, the specific role of cilostazol on platelet aggregation in patients with acute myocardial infarction (AMI) is less well understood. Thirty-six patients with AMI who were successfully treated with primary angioplasty were randomized to 3 antiplatelet regimens: ASA alone (n = 12), ASA + ticlopidine (n = 12), and ASA + cilostazol (n = 12). We measured shear stress-induced platelet aggregation (SIPA) using a modified cone-plate viscometer on admission and on day 7, and evaluated the inhibitory effects of combination therapy with ASA + cilostazol on SIPA. Compared with cases of stable coronary artery disease, significant increases in SIPA and plasma von Willebrand factor activity were observed in patients with AMI before they received antiplatelet therapy. On day 7 after primary angioplasty, ASA did not inhibit SIPA (65 +/- 15% vs 57 +/- 11%, p = 0.086), whereas both combination therapies of ASA + ticlopidine and ASA + cilostazol significantly inhibited SIPA in patients with AMI (ASA + ticlopidine: 61 +/- 15% vs 45 +/- 13%, p <0. 0001; ASA + cilostazol: 64 +/- 14% vs 43 +/- 9%, p <0.005). There was a significant correlation of SIPA with adenosine diphosphate (ADP)-induced platelet aggregation (r = 0.412, p = 0.003) and with plasma von Willebrand factor activity (r = 0.461, p = 0.0008). These data suggest that patients with AMI have increased platelet aggregability in response to high shear stress. Combined antiplatelet therapy with ASA + cilostazol appears to be as effective as therapy with ASA + ticlopidine for reducing SIPA in patients with AMI who are undergoing primary angioplasty.
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Affiliation(s)
- T Tanigawa
- First Department of Internal Medicine, Mie University School of Medicine, Mie, Japan
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Abstract
Although beta3-adrenoceptors (ARs) have been extensively characterized in brown and white adipocytes, their actions in the beating heart are unclear. We examined the effects of a beta3-AR agonist, BRL37344, on cardiac function and calcium transients in Langendorff-perfused guinea pig hearts by simultaneously measuring left ventricular (LV) pressure and Ca2+-dependent indo-1 fluorescence. BRL37344 induced a dose-dependent negative inotropic effect at concentrations from 10(-11) to 10(-8) M. Maximally, LV developed pressure decreased to 80+/-2%, +dP/dt to 81+/-2%. and -dP/dt to 81+/-3% of their respective control values (p < 0.01). The amplitude of the Ca2+ transient also decreased (to 92+/-3% of the control level; p < 0.01). The BRL37344 dose-response curve was not altered by nadolol (10(-5) M), a potent beta1- and beta2-AR antagonist, but completely suppressed by bupranolol (10(-6) M), a potent beta1-, beta2- and beta3-AR antagonist. To assess the potential role of a nitric oxide synthase (NOS) pathway, we determined whether the NOS inhibitor, N(G)-nitro-L-arginine methyl ester (L-NAME), modified the contractile response to BRL37344. L-NAME (10(-7) and 10(-4) M) attenuated the negative inotropic effects on LV developed pressure by 35 and 50%, suggesting that beta3-AR stimulation induces a negative inotropic effect on guinea pig hearts partly through a decrease in the Ca2+ transient and partly by the NOS pathway.
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Affiliation(s)
- T Kitamura
- The First Department of Internal Medicine, Mie University School of Medicine, Tsu, Japan
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Miyasita K, Yamada N, Yazu T, Shimizu A, Okinaka T, Fujioka H, Isaka N, Takase K, Nakano T. [Azygos continuation of inferior vena cava as a sourse of acute massive pulmonary thromboembolism]. Nihon Naika Gakkai Zasshi 2000; 89:765-7. [PMID: 10876937 DOI: 10.2169/naika.89.765] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- K Miyasita
- First Department of Internal Medicine, Mie University School of Medicine, Tsu
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Nakano T, Saito Y, Shibata M, Okinaka T, Isaka N, Sakuma H, Kawada N, Takeda K. [Present status and future prospects in Cardiac MRI]. Nihon Naika Gakkai Zasshi 1999; 88:1834-40. [PMID: 10581771] [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: 02/14/2023]
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Nakamura M, Ichikawa K, Ito M, Yamamori B, Okinaka T, Isaka N, Yoshida Y, Fujita S, Nakano T. Effects of the phosphorylation of myosin phosphatase by cyclic GMP-dependent protein kinase. Cell Signal 1999; 11:671-6. [PMID: 10530875 DOI: 10.1016/s0898-6568(99)00036-4] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Cyclic GMP-dependent protein kinase (PKG) phosphorylated, in vitro, the large (MYPT1) and small (M20) regulatory subunits of myosin phosphatase (MP) with maximum stoichiometries of 1.8 and 0.6 mol of phosphate/mol subunit, respectively. The phosphorylation of these subunits by PKG did not affect the phosphatase activity towards the 20 kDa myosin light chain. However, phosphorylation of the MP holoenzyme decreased the binding of MP to phospholipid. The phosphorylation of the serine residue of the C-terminal part of MYPT1 was crucial for these interactions. These results suggest that the phosphorylation of MP by PKG is not a direct mechanism in activating MP activity, and that other indirect mechanisms, including the interaction between MP and phospholipids, might be candidates for Ca2+ desensitization via cGMP in smooth muscle.
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Affiliation(s)
- M Nakamura
- First Department of Internal Medicine, Mie University School of Medicine, Tsu, Japan
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18
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Kureishi Y, Ito M, Feng J, Okinaka T, Isaka N, Nakano T. Regulation of Ca2+-independent smooth muscle contraction by alternative staurosporine-sensitive kinase. Eur J Pharmacol 1999; 376:315-20. [PMID: 10448893 DOI: 10.1016/s0014-2999(99)00367-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
It is well known that inhibition of myosin phosphatase induces smooth muscle contraction in the absence of Ca2+. We characterized the kinase(s) which plays a role in Ca2+-independent, microcystin-LR-induced contraction in permeabilized smooth muscle of the rabbit portal vein. Assessments of various protein kinase inhibitors revealed this kinase(s) (1) was sensitive to staurosporine (1 microM), but resistant to other agents including wortmannin (10 microM), Y-27632 ((R)-(+)-trans-N-(4-pyridyl)-4-(1-aminoethyl)-cyclohexanecarboxamide+ ++, 100 microM). HA1077 (1-(5-isoquinolinylsulfonyl)-homopiperazine, 100 microM), H-7 (1-(5-isoquinolinylsulfonyl)-2-methylpiperazine, 100 microM), and calphostin C (100 microM), and (2) induced phosphorylation of 20 kDa myosin light chain at serine-19. We concluded that other kinases exist which phosphorylate myosin light chain at serine-19 and induce Ca2+-independent smooth muscle contraction, distinct from Rho-associated kinase, myosin light chain kinase, and protein kinase C.
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Affiliation(s)
- Y Kureishi
- First Department of Internal Medicine, Mie University School of Medicine, Tsu, Japan
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19
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Okinaka T, Saitoh Y, Nakano T. [A 43-year-old man with progressive malaise and weight loss]. J Cardiol 1999; 34:41-3. [PMID: 10422625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Affiliation(s)
- T Okinaka
- First Department of Internal Medicine, Faculty of Medicine, Mie University
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20
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Feng J, Ito M, Nishikawa M, Okinaka T, Isaka N, Hartshorne DJ, Nakano T. Dephosphorylation of distinct sites on the 20 kDa myosin light chain by smooth muscle myosin phosphatase. FEBS Lett 1999; 448:101-4. [PMID: 10217418 DOI: 10.1016/s0014-5793(99)00337-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The dephosphorylation of the myosin light chain kinase and protein kinase C sites on the 20 kDa myosin light chain by myosin phosphatase was investigated. The myosin phosphatase holoenzyme and catalytic subunit, dephosphorylated Ser-19, Thr-18 and Thr-9, but not Ser-1/Ser-2. The role of noncatalytic subunits in myosin phosphatase was to activate the phosphatase activity. For Ser-19 and Thr-18, this was due to a decrease in Km and an increase in k(cat) and for Thr-9 to a decrease in Km. Thus, the distinction between the various sites is a property of the catalytic subunit.
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Affiliation(s)
- J Feng
- First Department of Internal Medicine, Mie University School of Medicine, Tsu, Japan
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21
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Mori S, Konishi T, Matsuoka K, Deguchi M, Ohta M, Mizuno O, Ueno T, Okinaka T, Nishimura Y, Ito N, Nakano T. Strongyloidiasis associated with nephrotic syndrome. Intern Med 1998; 37:606-10. [PMID: 9711888 DOI: 10.2169/internalmedicine.37.606] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
We report a nephrotic syndrome patient with eosinophilia who developed ileus, epigastralgia and malabsorption due to strongyloidiasis which became symptomatic by steroid therapy. The patient was then treated with thiabendazole and recovered. A percutaneous renal biopsy revealed minimal change nephrotic syndrome. This renal injury may be brought on by severe infection of Strongyloides stercoralis. It is important to rule out strongyloidiasis prior to corticosteroid therapy to patients from eosinophilia endemic areas.
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Affiliation(s)
- S Mori
- Department of Internal Medicine, Mie Prefectural General Medical Center, Yokkaichi
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22
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Akahori F, Nagata T, Masaoka T, Okinaka T. Effect of dehydroproline as a collagen synthetic inhibitor in paraquat-induced pulmonary fibrosis in beagle dogs. Vet Hum Toxicol 1993; 35:216-22. [PMID: 8351792] [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] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
To investigate the effect of 3,4-DL-dehydroproline (DHP) on paraquat (PQ)-induced pulmonary fibrosis in beagle dogs, 25 beagles without distinction of sex were allocated at random into 2 groups; 17 dogs were PQ-dosed and 8 were saline-dosed. The 17 dogs were given 1 mg PQ/kg/d sc for 7-11 d; 14 of the 17 had decreased body weight on day 11 and were selected, 2 of which were determined at random and necropsied. The remaining 12 dogs were randomly divided into 2 groups of 6 dogs each (DHP-treated or saline-treated). They received either 25 mg DHP/kg/d sc or saline for 14 d and were sacrificed for measurement of lung lipid peroxide and lung hydroxyproline (Hyp) concentrations on day 25 or 180 after the PQ administrations started. Two of the 17 dogs (11.8%) given 1 mg PQ/kg/d sc died on days 9 and 11 of the administration. One dog (5.9%) had no signs of PQ toxicity including no decrease in body weight. The remaining 14 dogs (82.4%) had decreased body weight until day 11 of the PQ administrations. No significant differences in erythrocyte superoxide dismutase, blood catalase and serum-lipid peroxide occurred from the PQ dosing; however, lung lipid peroxide increased 4-fold. On day 180 the lung lipid peroxide of the PQ + saline treated group was still 4-times elevated, while the PQ + DHP treated group had about 1/2 that value. Lung Hyp concentrations in the PQ dosed dogs were significantly increased.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- F Akahori
- Department of Veterinary Pharmacology, School of Veterinary Medicine, Azabu University, Kanagawa, Japan
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23
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Setsuda M, Inden M, Hiraoka N, Okamoto S, Tanaka H, Okinaka T, Nishimura Y, Okano H, Kouji T, Konishi T. Probucol therapy in the prevention of restenosis after successful percutaneous transluminal coronary angioplasty. Clin Ther 1993; 15:374-82. [PMID: 8519045] [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: 01/31/2023]
Abstract
The effect of probucol, a drug that inhibits the secretion of smooth muscle cell-derived growth factor, was evaluated in the prevention of restenosis after percutaneous transluminal coronary angioplasty (PTCA). In 67 patients who successfully underwent prospective PTCA for the first time, the effects obtained in 31 patients given 750 mg or 1000 mg of probucol daily (group P) were compared with those in 36 patients given 150 mg of dipyridamole daily (group D). Drug treatment was initiated at least 7 days before PTCA and was continued for 3 to 6 months after PTCA, at which time a follow-up angiography was performed. There were no significant differences in patient characteristics (age, sex, pre-PTCA severity of angina pectoris), the number of affected vessels undergoing dilatation, or the residual degree of stenosis. The restenosis rate was significantly lower in group P (6 cases, 19.4%) than in group D (15 cases, 41.7%). In the nonrestenosis subgroup, the degree of stenosis progressed from 28.0 +/- 13.9% just after PTCA to 32.4 +/- 20.5% at follow-up angiography in group P, while it progressed significantly from 28.6 +/- 15.6% to 40.1 +/- 21.2% in group D (P < 0.05). A significant drop in serum cholesterol was observed in group P. The restenosis rate was lower in patients with high cholesterol levels at PTCA. No adverse reactions were noted in any patient. We conclude that probucol is effective in preventing restenosis after PTCA.
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Affiliation(s)
- M Setsuda
- Matsusaka Central General Hospital, Mie, Japan
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24
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Oike Y, Hiraiwa H, Kawakatsu H, Nishikai M, Okinaka T, Suzuki T, Okada A, Yatani R, Sakakura T. Isolation and characterization of human fibroblast tenascin. An extracellular matrix glycoprotein of interest for developmental studies. Int J Dev Biol 1990; 34:309-17. [PMID: 1696829] [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] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
We have developed a biochemical method for purifying human tenascin from cultured fibroblasts or the culture medium. The method is a series of biochemical procedures including gel filtration, gelatin gel affinity chromatography and ion-exchange high performance liquid chromatography. The final preparation was identified as tenascin from its immunological cross-reactivity to antibody against chicken tenascin, strong hemagglutination activity which has been reported to be one of the biological functions of chicken tenascin, and from the electron microscopic study demonstrating a six-armed structure. Gel chromatography showed that intact human tenascin has an apparent molecular weight of over one million. Analysis of the purified tenascin with SDS-PAGE under reducing conditions demonstrated that tenascin consists of two kinds of subunits (250K and 190K). We established rat x mouse heterohybridoma cell lines which produce tenascin-specific antibodies. One monoclonal antibody (RCB1) was selected for immunohistochemical study and partially characterized. RCB1 bound native tenascin but not reduced and alkylated tenascin. Immunohistochemistry of normal and neoplastic tissues demonstrated that RCB1 bound the connective tissues surrounding the cancer nests and various normal tissues including interstitium of renal distal tubule, periosteum, endosteum, smooth muscles of digestive tract and media of arteries and arterioles.
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Affiliation(s)
- Y Oike
- Japan Immunoresearch Laboratories Inc., Takasaki
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25
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Yatani R, Kusano I, Takanari H, Nakano H, Okinaka T, Komada S. [International comparison of prostatic cancer]. Gan No Rinsho 1989; Spec No:239-45. [PMID: 2601014] [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: 01/01/2023]
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26
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Sasaki E, Kushida S, Okinaka T, Sasaki K, Abe S. [Case report of double cancer of the pancreas and the kidney with polyposis of the large intestine]. Gan No Rinsho 1969; 15:203-6. [PMID: 5814514] [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: 01/16/2023]
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