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Tabata Y, Omori S, Mitsuhashi O, Enomoto K, Sawano Y, Murotani N, Omori K, Tabata Y, Majima T. Comparison of Intra-articular Knee Injection of Corticosteroid between Hemodialysis and Non-hemodialysis Patients. JMA J 2023; 6:307-311. [PMID: 37560363 PMCID: PMC10407458 DOI: 10.31662/jmaj.2023-0020] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Accepted: 04/24/2023] [Indexed: 08/11/2023] Open
Abstract
INTRODUCTION Hemodialysis patients have various complications, and orthopedic diseases include carpal tunnel syndrome, spinal canal stenosis, spondylosis destruction, fractures, and osteoarthritis. As a treatment for knee osteoarthritis, intra-articular injections of hyaluronic acid and steroids are performed. In general, steroid injections have a strong short-term anti-inflammatory effect, but there is a risk of complications, such as infection. In addition to aging, dialysis patients are prone to weakened immune systems and susceptibility to infection. Therefore, more attention should be paid to the treatment of osteoarthritis in dialysis patients. This study aimed to compare the effects of steroid and complication of infection of dialysis and non-dialysis patients who underwent intra-articular steroid injection. METHODS A total of 20 dialysis patients (23 knees) and 20 non-dialysis patients (24 knees) with knee osteoarthritis who underwent steroid injections were investigated. All patients underwent radiographic diagnosis and were evaluated for the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) score, visual analog scale (VAS), range of motion (ROM), and side effects before, and at 3, and 6 months after injection. RESULTS The mean body mass index (BMI) was 21.3 (±standard deviation (SD) 2.8) and 24.9 (±SD 2.6) in dialysis and non-dialysis patients, respectively, showing a significant difference. Both dialysis and non-dialysis patients showed statistically significant improvement in VAS and WOMAC scores after steroid injection. There were no significant differences between dialysis and non-dialysis patients in the gender differences and mean age. There were no infection complications in both groups. CONCLUSIONS This study revealed the analgesic effect of steroids on knee osteoarthritis in dialysis and non-dialysis patients. On the other hand, there were no infection complications in either patient. These findings suggest that intra-articular steroid injection is safe for dialysis patients.
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Affiliation(s)
- Yusuke Tabata
- Department of Orthopedic Surgery, Mitsuhashi Hospital, Chiba, Japan
- Vascular Access Center, Mitsuhashi Hospital, Chiba, Japan
- Department of Orthopedic Surgery, Nippon Medical School Hospital, Tokyo, Japan
| | - Satoshi Omori
- Vascular Access Center, Mitsuhashi Hospital, Chiba, Japan
| | | | - Kazuo Enomoto
- Vascular Access Center, Mitsuhashi Hospital, Chiba, Japan
| | - Yuki Sawano
- Vascular Access Center, Mitsuhashi Hospital, Chiba, Japan
| | | | - Koichiro Omori
- Vascular Access Center, Mitsuhashi Hospital, Chiba, Japan
| | | | - Tokifumi Majima
- Department of Orthopedic Surgery, Nippon Medical School Hospital, Tokyo, Japan
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Tabah A, Buetti N, Staiquly Q, Ruckly S, Akova M, Aslan AT, Leone M, Conway Morris A, Bassetti M, Arvaniti K, Lipman J, Ferrer R, Qiu H, Paiva JA, Povoa P, De Bus L, De Waele J, Zand F, Gurjar M, Alsisi A, Abidi K, Bracht H, Hayashi Y, Jeon K, Elhadi M, Barbier F, Timsit JF, Pollock H, Margetts B, Young M, Bhadange N, Tyler S, Ledtischke A, Finnis M, Ledtischke A, Finnis M, Dwivedi J, Saxena M, Biradar V, Soar N, Sarode V, Brewster D, Regli A, Weeda E, Ahmed S, Fourie C, Laupland K, Ramanan M, Walsham J, Meyer J, Litton E, Palermo AM, Yap T, Eroglu E, Attokaran AG, Jaramillo C, Nafees KMK, Rashid NAHA, Walid HAMI, Mon T, Moorthi PD, Sudhirchandra S, Sridharan DD, Haibo Q, Jianfeng X, Wei-Hua L, Zhen W, Qian C, Luo J, Chen X, Wang H, Zhao P, Zhao J, Wusi Q, Mingmin C, Xu L, Yin C, Wang R, Wang J, Yin Y, Zhang M, Ye J, Hu C, Zhou S, Huang M, Yan J, Wang Y, Qin B, Ye L, Weifeng X, Peije L, Geng N, Hayashi Y, Karumai T, Yamasaki M, Hashimoto S, Hosokawa K, Makino J, Matsuyoshi T, Kuriyama A, Shigemitsu H, Mishima Y, Nagashima M, Yoshida H, Fujitani S, Omori K, Rinka H, Saito H, Atobe K, Kato H, Takaki S, Hasan MS, Jamaluddin MFH, Pheng LS, Visvalingam S, Liew MT, Wong SLD, Fong KK, Rahman HBA, Noor ZM, Tong LK, Azman AH, Mazlan MZ, Ali S, Jeon K, Lee SM, Park S, Park SY, Lim SY, Goh QY, Ng SY, Lie SA, Kwa ALH, Goh KJ, Li AY, Ong CYM, Lim JY, Quah JL, Ng K, Ng LXL, Yeh YC, Chou NK, Cia CT, Hu TY, Kuo LK, Ku SC, Wongsurakiat P, Apichatbutr Y, Chiewroongroj S, Nadeem R, Houfi AE, Alsisi A, Elhadidy A, Barsoum M, Osman N, Mostafa T, Elbahnasawy M, Saber A, Aldhalia A, Elmandouh O, Elsayed A, Elbadawy MA, Awad AK, Hemead HM, Zand F, Ouhadian M, Borsi SH, Mehraban Z, Kashipazha D, Ahmadi F, Savaie M, Soltani F, Rashidi M, Baghbanian R, Javaherforoosh F, Amiri F, Kiani A, Zargar MA, Mahmoodpoor A, Aalinezhad F, Dabiri G, Sabetian G, Sarshad H, Masjedi M, Tajvidi R, Tabatabaei SMN, Ahmed AK, Singer P, Kagan I, Rigler M, Belman D, Levin P, Harara B, Diab A, Abilama F, Ibrahim R, Fares A, Buimsaedah A, Gamra M, Aqeelah A, AliAli AM, Homaidan AGS, Almiqlash B, Bilkhayr H, Bouhuwaish A, Taher AS, Abdulwahed E, Abousnina FA, Hdada AK, Jobran R, Hasan HB, Hasan RSB, Serghini I, Seddiki R, Boukatta B, Kanjaa N, Mouhssine D, Wajdi MA, Dendane T, Zeggwagh AA, Housni B, Younes O, Hachimi A, Ghannam A, Belkhadir Z, Amro S, Jayyab MA, Hssain AA, Elbuzidi A, Karic E, Lance M, Nissar S, Sallam H, Elrabi O, Almekhlafi GA, Awad M, Aljabbary A, Chaaban MK, Abu-Sayf N, Al-Jadaan M, Bakr L, Bouaziz M, Turki O, Sellami W, Centeno P, Morvillo LN, Acevedo JO, Lopez PM, Fernández R, Segura M, Aparicio DM, Alonzo MI, Nuccetelli Y, Montefiore P, Reyes LF, Reyes LF, Ñamendys-Silva SA, Romero-Gonzalez JP, Hermosillo M, Castillo RA, Leal JNP, Aguilar CG, Herrera MOG, Villafuerte MVE, Lomeli-Teran M, Dominguez-Cherit JG, Davalos-Alvarez A, Ñamendys-Silva SA, Sánchez-Hurtado L, Tejeda-Huezo B, Perez-Nieto OR, Tomas ED, De Bus L, De Waele J, Hollevoet I, Denys W, Bourgeois M, Vanderhaeghen SFM, Mesland JB, Henin P, Haentjens L, Biston P, Noel C, Layos N, Misset B, De Schryver N, Serck N, Wittebole X, De Waele E, Opdenacker G, Kovacevic P, Zlojutro B, Custovic A, Filipovic-Grcic I, Radonic R, Brajkovic AV, Persec J, Sakan S, Nikolic M, Lasic H, Leone M, Arbelot C, Timsit JF, Patrier J, Zappela N, Montravers P, Dulac T, Castanera J, Auchabie J, Le Meur A, Marchalot A, Beuzelin M, Massri A, Guesdon C, Escudier E, Mateu P, Rosman J, Leroy O, Alfandari S, Nica A, Souweine B, Coupez E, Duburcq T, Kipnis E, Bortolotti P, Le Souhaitier M, Mira JP, Garcon P, Duprey M, Thyrault M, Paulet R, Philippart F, Tran M, Bruel C, Weiss E, Janny S, Foucrier A, Perrigault PF, Djanikian F, Barbier F, Gainnier M, Bourenne J, Louis G, Smonig R, Argaud L, Baudry T, Dessap AM, Razazi K, Kalfon P, Badre G, Larcher R, Lefrant JY, Roger C, Sarton B, Silva S, Demeret S, Le Guennec L, Siami S, Aparicio C, Voiriot G, Fartoukh M, Dahyot-Fizelier C, Imzi N, Klouche K, Bracht H, Hoheisen S, Bloos F, Thomas-Rueddel D, Petros S, Pasieka B, Dubler S, Schmidt K, Gottschalk A, Wempe C, Lepper P, Metz C, Viderman D, Ymbetzhanov Y, Mugazov M, Bazhykayeva Y, Kaligozhin Z, Babashev B, Merenkov Y, Temirov T, Arvaniti K, Smyrniotis D, Psallida V, Fildisis G, Soulountsi V, Kaimakamis E, Iasonidou C, Papoti S, Renta F, Vasileiou M, Romanou V, Koutsoukou V, Matei MK, Moldovan L, Karaiskos I, Paskalis H, Marmanidou K, Papanikolaou M, Kampolis C, Oikonomou M, Kogkopoulos E, Nikolaou C, Sakkalis A, Chatzis M, Georgopoulou M, Efthymiou A, Chantziara V, Sakagianni A, Athanasa Z, Papageorgiou E, Ali F, Dimopoulos G, Almiroudi MP, Malliotakis P, Marouli D, Theodorou V, Retselas I, Kouroulas V, Papathanakos G, Montrucchio G, Sales G, De Pascale G, Montini LM, Carelli S, Vargas J, Di Gravio V, Giacobbe DR, Gratarola A, Porcile E, Mirabella M, Daroui I, Lodi G, Zuccaro F, Schlevenin MG, Pelosi P, Battaglini D, Cortegiani A, Ippolito M, Bellina D, Di Guardo A, Pelagalli L, Covotta M, Rocco M, Fiorelli S, Cotoia A, Rizzo AC, Mikstacki A, Tamowicz B, Komorowska IK, Szczesniak A, Bojko J, Kotkowska A, Walczak-Wieteska P, Wasowska D, Nowakowski T, Broda H, Peichota M, Pietraszek-Grzywaczewska I, Martin-Loeches I, Bisanti A, Cartoze N, Pereira T, Guimarães N, Alves M, Marques AJP, Pinto AR, Krystopchuk A, Teresa A, de Figueiredo AMP, Botelho I, Duarte T, Costa V, Cunha RP, Molinos E, da Costa T, Ledo S, Queiró J, Pascoalinho D, Nunes C, Moura JP, Pereira É, Mendes AC, Valeanu L, Bubenek-Turconi S, Grintescu IM, Cobilinschi C, Filipescu DC, Predoi CE, Tomescu D, Popescu M, Marcu A, Grigoras I, Lungu O, Gritsan A, Anderzhanova A, Meleshkina Y, Magomedov M, Zubareva N, Tribulev M, Gaigolnik D, Eremenko A, Vistovskaya N, Chukina M, Belskiy V, Furman M, Rocca RF, Martinez M, Casares V, Vera P, Flores M, Amerigo JA, Arnillas MPG, Bermudez RM, Armestar F, Catalan B, Roig R, Raguer L, Quesada MD, Santos ED, Gomà G, Ubeda A, Salgado DM, Espina LF, Prieto EG, Asensio DM, Rodriguez DM, Maseda E, De La Rica AS, Ayestaran JI, Novo M, Blasco-Navalpotro MA, Gallego AO, Sjövall F, Spahic D, Svensson CJ, Haney M, Edin A, Åkerlund J, De Geer L, Prazak J, Jakob S, Pagani J, Abed-Maillard S, Akova M, Aslan AT, Timuroglu A, Kocagoz S, Kusoglu H, Mehtap S, Ceyhun S, Altintas ND, Talan L, Kayaaslan B, Kalem AK, Kurt I, Telli M, Ozturk B, Erol Ç, Demiray EKD, Çolak S, Akbas T, Gundogan K, Sari A, Agalar C, Çolak O, Baykam NN, Akdogan OO, Yilmaz M, Tunay B, Cakmak R, Saltoglu N, Karaali R, Koksal I, Aksoy F, Eroglu A, Saracoglu KT, Bilir Y, Guzeldag S, Ersoz G, Evik G, Sungurtekin H, Ozgen C, Erdoğan C, Gürbüz Y, Altin N, Bayindir Y, Ersoy Y, Goksu S, Akyol A, Batirel A, Aktas SC, Morris AC, Routledge M, Morris AC, Ercole A, Antcliffe D, Rojo R, Tizard K, Faulkner M, Cowton A, Kent M, Raj A, Zormpa A, Tinaslanidis G, Khade R, Torlinski T, Mulhi R, Goyal S, Bajaj M, Soltan M, Yonan A, Dolan R, Johnson A, Macfie C, Lennard J, Templeton M, Arias SS, Franke U, Hugill K, Angell H, Parcell BJ, Cobb K, Cole S, Smith T, Graham C, Cerman J, Keegan A, Ritzema J, Sanderson A, Roshdy A, Szakmany T, Baumer T, Longbottom R, Hall D, Tatham K, Loftus S, Husain A, Black E, Jhanji S, Baikady RR, Mcguigan P, Mckee R, Kannan S, Antrolikar S, Marsden N, Torre VD, Banach D, Zaki A, Jackson M, Chikungwa M, Attwood B, Patel J, Tilley RE, Humphreys MSK, Renaud PJ, Sokhan A, Burma Y, Sligl W, Baig N, McCoshen L, Kutsogiannis DJ, Sligl W, Thompson P, Hewer T, Rabbani R, Huq SMR, Hasan R, Islam MM, Gurjar M, Baronia A, Kothari N, Sharma A, Karmakar S, Sharma P, Nimbolkar J, Samdani P, Vaidyanathan R, Rubina NA, Jain N, Pahuja M, Singh R, Shekhar S, Muzaffar SN, Ozair A, Siddiqui SS, Bose P, Datta A, Rathod D, Patel M, Renuka MK, Baby SK, Dsilva C, Chandran J, Ghosh P, Mukherjee S, Sheshala K, Misra KC, Yakubu SY, Ugwu EM, Olatosi JO, Desalu I, Asiyanbi G, Oladimeji M, Idowu O, Adeola F, Mc Cree M, Karar AAA, Saidahmed E, Hamid HKS. Epidemiology and outcomes of hospital-acquired bloodstream infections in intensive care unit patients: the EUROBACT-2 international cohort study. Intensive Care Med 2023; 49:178-190. [PMID: 36764959 PMCID: PMC9916499 DOI: 10.1007/s00134-022-06944-2] [Citation(s) in RCA: 30] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Accepted: 11/23/2022] [Indexed: 02/12/2023]
Abstract
PURPOSE In the critically ill, hospital-acquired bloodstream infections (HA-BSI) are associated with significant mortality. Granular data are required for optimizing management, and developing guidelines and clinical trials. METHODS We carried out a prospective international cohort study of adult patients (≥ 18 years of age) with HA-BSI treated in intensive care units (ICUs) between June 2019 and February 2021. RESULTS 2600 patients from 333 ICUs in 52 countries were included. 78% HA-BSI were ICU-acquired. Median Sequential Organ Failure Assessment (SOFA) score was 8 [IQR 5; 11] at HA-BSI diagnosis. Most frequent sources of infection included pneumonia (26.7%) and intravascular catheters (26.4%). Most frequent pathogens were Gram-negative bacteria (59.0%), predominantly Klebsiella spp. (27.9%), Acinetobacter spp. (20.3%), Escherichia coli (15.8%), and Pseudomonas spp. (14.3%). Carbapenem resistance was present in 37.8%, 84.6%, 7.4%, and 33.2%, respectively. Difficult-to-treat resistance (DTR) was present in 23.5% and pan-drug resistance in 1.5%. Antimicrobial therapy was deemed adequate within 24 h for 51.5%. Antimicrobial resistance was associated with longer delays to adequate antimicrobial therapy. Source control was needed in 52.5% but not achieved in 18.2%. Mortality was 37.1%, and only 16.1% had been discharged alive from hospital by day-28. CONCLUSIONS HA-BSI was frequently caused by Gram-negative, carbapenem-resistant and DTR pathogens. Antimicrobial resistance led to delays in adequate antimicrobial therapy. Mortality was high, and at day-28 only a minority of the patients were discharged alive from the hospital. Prevention of antimicrobial resistance and focusing on adequate antimicrobial therapy and source control are important to optimize patient management and outcomes.
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Affiliation(s)
- Alexis Tabah
- Intensive Care Unit, Redcliffe Hospital, Brisbane, Australia. .,Queensland Critical Care Research Network (QCCRN), Brisbane, QLD, Australia. .,Queensland University of Technology, Brisbane, QLD, Australia. .,Faculty of Medicine, The University of Queensland, Brisbane, QLD, Australia.
| | - Niccolò Buetti
- Infection Control Program and WHO Collaborating Centre on Patient Safety, Geneva University Hospitals and Faculty of Medicine, Geneva, Switzerland.,Université de Paris, INSERM, IAME UMR 1137, 75018, Paris, France
| | | | - Stéphane Ruckly
- Université de Paris, INSERM, IAME UMR 1137, 75018, Paris, France.,ICUREsearch, Biometry, 38600, Fontaine, France
| | - Murat Akova
- Department of Infectious Diseases, Hacettepe University School of Medicine, Ankara, Turkey
| | - Abdullah Tarik Aslan
- Department of Internal Medicine, Hacettepe University School of Medicine, Ankara, Turkey
| | - Marc Leone
- Department of Anesthesiology and Intensive Care Unit, Hospital Nord, Aix Marseille University, Assistance Publique Hôpitaux Universitaires de Marseille, Marseille, France
| | - Andrew Conway Morris
- Division of Anaesthesia, Department of Medicine, University of Cambridge, Addenbrooke's Hospital, Hills Road, Cambridge, CB2 0QQ, UK.,Division of Immunology, Department of Pathology, University of Cambridge, Tennis Court Road, Cambridge, Cb2 1QP, UK.,JVF Intensive Care Unit, Addenbrooke's Hospital, Cambridge, Hills Road, Cambridge, CB2 0QQ, UK
| | - Matteo Bassetti
- Infectious Diseases Clinic, Department of Health Sciences, University of Genoa and Ospedale Policlinico San Martino, Genoa, Italy
| | - Kostoula Arvaniti
- Intensive Care Unit, Papageorgiou University Affiliated Hospital, Thessaloníki, Greece
| | - Jeffrey Lipman
- Faculty of Medicine, The University of Queensland, Brisbane, QLD, Australia.,Nimes University Hospital, University of Montpellier, Nimes, France.,Jamieson Trauma Institute, Royal Brisbane and Women's Hospital, Herston, Australia
| | - Ricard Ferrer
- Intensive Care Department, SODIR-VHIR Research Group, Vall d'Hebron University Hospital, Barcelona, Spain
| | - Haibo Qiu
- Jiangsu Provincial Key Laboratory of Critical Care Medicine, Department of Critical Care Medicine, Nanjing Zhongda Hospital, Southeast University, Nanjing, 210009, China
| | - José-Artur Paiva
- Intensive Care Medicine Department, Centro Hospitalar Universitário Sao Joao, Porto, Portugal.,Department of Medicine, Faculty of Medicine, University of Porto, Porto, Portugal.,Infection and Sepsis ID Group, Porto, Portugal
| | - Pedro Povoa
- NOVA Medical School, New University of Lisbon, Lisbon, Portugal.,Center for Clinical Epidemiology and Research Unit of Clinical Epidemiology, OUH Odense University Hospital, Odense, Denmark.,Polyvalent Intensive Care Unit, Hospital de São Francisco Xavier, CHLO, Lisbon, Portugal
| | - Liesbet De Bus
- Department of Critical Care Medicine, Ghent University Hospital, Ghent, Belgium
| | - Jan De Waele
- Department of Internal Medicine and Pediatrics, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium.,Department of Intensive Care Medicine, Ghent University Hospital, Ghent, Belgium
| | - Farid Zand
- Anesthesiology and Critical Care Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Mohan Gurjar
- Department of Critical Care Medicine, Sanjay Gandhi Post Graduate Institute of Medical Sciences (SGPGIMS), Lucknow, India
| | - Adel Alsisi
- ICU Department, Prime Hospital, Dubai, United Arab Emirates.,Critical Care Department, Faculty of Medicine, Cairo University, Cairo, Egypt
| | - Khalid Abidi
- Medical ICU, Ibn Sina University Hospital, Faculty of Medicine and Pharmacy, Mohammed V University, Rabat, Morocco
| | - Hendrik Bracht
- Central Interdisciplinary Emergency Medicine, University Hospital Ulm, Ulm, Germany
| | - Yoshiro Hayashi
- Department of Intensive Care Medicine, Kameda General Hospital, Kamogawa, Japan
| | - Kyeongman Jeon
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
| | | | - François Barbier
- Service de Médecine Intensive-Réanimation, Centre Hospitalier Régional d'Orléans, 14, avenue de L'Hôpital, 45100, Orléans, France
| | - Jean-François Timsit
- Université Paris-Cité, INSERM, IAME UMR 1137, 75018, Paris, France.,Medical and Infectious Diseases Intensive Care Unit, AP-HP, Bichat-Claude Bernard University Hospital, 46 Omdurman maternity hospitalrue Henri Huchard, 75877, Paris Cedex, France
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Tabata Y, Matsui S, Miyamoto M, Omori K, Tabata Y, Majima T. Transient osteoporosis of the hip with a femoral neck fracture during follow-up: a case report. J Yeungnam Med Sci 2022; 40:212-217. [PMID: 36153877 PMCID: PMC10076925 DOI: 10.12701/jyms.2022.00479] [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] [Subscribe] [Scholar Register] [Received: 07/09/2022] [Accepted: 08/07/2022] [Indexed: 11/04/2022]
Abstract
We report a case of transient osteoporosis of the hip with a femoral neck fracture found during follow-up. A 53-year-old man presented with left hip pain without trauma. The pain did not improve after 2 weeks and he was brought to our hospital by ambulance. Magnetic resonance imaging (MRI) of the left hip joint showed diffuse edema in the bone marrow, which was identified by low signal intensity on T1-weighted images, high signal intensity on T2-weighted images, and increased signal intensity on short tau inversion recovery. This edema extended from the femoral head and neck to the intertrochanteric area. He was diagnosed with transient osteoporosis of the left hip. Rest gradually improved his pain; however, 3 weeks later, his left hip pain worsened without trauma. X-ray, computed tomography, and MRI results of the hip joint demonstrated a left femoral neck fracture, and osteosynthesis was performed. Differential diagnoses included avascular necrosis of the femoral head, infection, complex regional pain syndrome, rheumatoid arthritis, leukemia, and other cancers. Transient osteoporosis of the hip generally has a good prognosis with spontaneous remission within a few months to 1 year. However, a sufficient length of follow-up from condition onset to full recovery is necessary to avoid all probable complications such as fractures.
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Affiliation(s)
- Yusuke Tabata
- Department of Orthopedic Surgery, Mitsuhashi Hospital, Chiba, Japan
- Department of Orthopedic Surgery, Nippon Medical School Hospital, Tokyo, Japan
- Corresponding author: Yusuke Tabata, MD, PhD Department of Orthopedic Surgery, Mitsuhashi Hospital, Kameicho, Chuo-ku, Chiba 260-0011, Japan Tel: +81-432248201 • Fax: +81-432248205 • E-mail:
| | - Shuhei Matsui
- Department of Orthopedic Surgery, Musashino General Hospital, Kawagoe, Japan
| | - Masabumi Miyamoto
- Department of Orthopedic Surgery, Sekishindo Hospital, Kawagoe, Japan
| | - Koichiro Omori
- Department of Orthopedic Surgery, Mitsuhashi Hospital, Chiba, Japan
| | - Yoichiro Tabata
- Department of Orthopedic Surgery, Mitsuhashi Hospital, Chiba, Japan
| | - Tokifumi Majima
- Department of Orthopedic Surgery, Nippon Medical School Hospital, Tokyo, Japan
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4
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Nakayama T, Oishi M, Weng J, Omori K, Kwon C, Nakazawa T, Nishibata T, Kinugasa F, Yoshida T, Nagasaka Y. 42P Antitumor activity of zolbetuximab combined with chemotherapy and anti-mouse PD-1 antibody (anti-mPD-1) in a syngeneic mouse model and a virtual preclinical trial using a quantitative systems pharmacology (QSP) model. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.07.069] [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: 11/01/2022] Open
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5
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Nishibata T, Weng J, Omori K, Sato Y, Nakazawa T, Suzuki T, Yamada T, Nakajo I, Kinugasa F, Yoshida T. 986P Antitumor effect of zolbetuximab combined with chemotherapeutic agents or an anti-mPD-1 antibody in syngeneic immune-competent mice. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.1370] [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: 11/25/2022] Open
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6
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Tsuji T, Inoue K, Omori K, Oka K, Iwai N, Hara T, Inada Y, Harada T, Okuda T, Komaki T, Nagata A, Kagawa K. Cervical squamous cell carcinoma coexisting with ectopic gastric mucosa treated by endoscopic submucosal dissection: A case report. Mol Clin Oncol 2020; 13:23-26. [PMID: 32454971 PMCID: PMC7241236 DOI: 10.3892/mco.2020.2037] [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: 04/21/2019] [Accepted: 04/02/2020] [Indexed: 12/24/2022] Open
Abstract
A 69-year-old Japanese man underwent an endoscopic submucosal dissection (ESD) for early gastric cancer 2 years prior to admission at Fukuchiyama City Hospital. A follow-up esophagogastroduodenoscopy (EGD) revealed a butterfly-shaped brownish area in the cervical esophagus. A successful endoscopic submucosal dissection of the esophageal lesion was performed for total biopsy. Histopathological analysis of the resected specimen revealed moderately differentiated squamous cell carcinoma of the esophagus, cervical esophagus tumor type 0-IIb, a tumor diameter of 14x8 mm, T1b pathological findings (invading into submucosa), infiltrative growth α, lymphatic invasion (-), venous invasion (-), a horizontal tumor free margin and a vertical tumor free margin. The results demonstrated that the squamous cell carcinoma had invaded into the submucosal layer under the ectopic gastric mucosa. After endoscopic treatment, chemoradiation therapy was administered to the patient.
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Affiliation(s)
- Toshifumi Tsuji
- Department of Gastroenterology and Hepatology, Fukuchiyama City Hospital, Fukuchiyama City, Kyoto 620-8505, Japan
| | - Ken Inoue
- Department of Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, Kyoto 602-856, Japan
| | - Koichiro Omori
- Department of Gastroenterology and Hepatology, Fukuchiyama City Hospital, Fukuchiyama City, Kyoto 620-8505, Japan
| | - Kohei Oka
- Department of Gastroenterology and Hepatology, Fukuchiyama City Hospital, Fukuchiyama City, Kyoto 620-8505, Japan
| | - Naoto Iwai
- Department of Gastroenterology and Hepatology, Fukuchiyama City Hospital, Fukuchiyama City, Kyoto 620-8505, Japan
| | - Tasuku Hara
- Department of Gastroenterology and Hepatology, Fukuchiyama City Hospital, Fukuchiyama City, Kyoto 620-8505, Japan
| | - Yutaka Inada
- Department of Gastroenterology and Hepatology, Fukuchiyama City Hospital, Fukuchiyama City, Kyoto 620-8505, Japan
| | - Taishi Harada
- Department of Oncology, Fukuchiyama City Hospital, Fukuchiyama, Kyoto 620-8505, Japan
| | - Takashi Okuda
- Department of Gastroenterology and Hepatology, Fukuchiyama City Hospital, Fukuchiyama City, Kyoto 620-8505, Japan
| | - Toshiyuki Komaki
- Department of Gastroenterology and Hepatology, Fukuchiyama City Hospital, Fukuchiyama City, Kyoto 620-8505, Japan
| | - Akihiro Nagata
- Department of Pathology, Fukuchiyama City Hospital, Fukuchiyama, Kyoto 620-8505, Japan
| | - Keizo Kagawa
- Department of Gastroenterology and Hepatology, Fukuchiyama City Hospital, Fukuchiyama City, Kyoto 620-8505, Japan
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7
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Arai N, Kan H, Ogawa M, Uchida Y, Takizawa M, Omori K, Miyati T, Kasai H, Kunitomo H, Shibamoto Y. Visualization of Nigrosome 1 from the Viewpoint of Anatomic Structure. AJNR Am J Neuroradiol 2019; 41:86-91. [PMID: 31806600 DOI: 10.3174/ajnr.a6338] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Accepted: 10/10/2019] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Parkinson disease is related to neurodegeneration and iron deposition in the substantia nigra pars compacta and nigrosome 1. However, visualization of nigrosome 1 via MR imaging is poor owing to the bilateral asymmetry, regardless of whether it is healthy. We focused on the magic angle and susceptibility effect and evaluated the anatomic slant structure of nigrosome 1 by tilting subjects' heads in the B0 direction. MATERIALS AND METHODS To investigate the effectiveness of the magic angle, we tilted the volunteers' heads to the right and left in the B0 direction or not at all for evaluating correlations between the degree of head tilting and visualization of the right nigrosome 1 and left nigrosome 1 using 3D spoiled gradient-echo sequences with multiecho acquisitions. We evaluated the susceptibility of nigrosome 1 and the local field using quantitative susceptibility mapping to assess static magnetic field inhomogeneity. RESULTS The heads tilted to the right and left showed significantly higher contrasts of nigrosome 1 and the substantia nigra pars compacta than the nontilted heads. No significant differences were observed in the visualization and susceptibility between the right nigrosome 1 and left nigrosome 1 for each head tilt. The effect of the magic angle was remarkable in the nontilted heads. This finding was supported by quantitative susceptibility mapping because the anatomic slant structure of nigrosome 1 was coherent between the axis of nigrosome 1 and the magic angle. CONCLUSIONS The asymmetric visualization of nigrosome 1 is affected by the magic angle and susceptibility. The anatomic slant structure of nigrosome 1 causes these challenges in visualization.
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Affiliation(s)
- N Arai
- From the Department of Radiology (N.A., H. Kasai, H. Kunitomo), Nagoya City University Hospital, Nagoya, Japan
| | - H Kan
- Radiological and Medical Laboratory Sciences (H. Kan), Nagoya University Graduate School of Medicine, Nagoya, Japan.,Departments of Radiology (H. Kan, M.O., Y.S.)
| | - M Ogawa
- Departments of Radiology (H. Kan, M.O., Y.S.)
| | - Y Uchida
- Neurology (Y.U.), Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - M Takizawa
- Healthcare Business Unit (M.T., K.O.), Hitachi Ltd, Tokyo, Japan
| | - K Omori
- Healthcare Business Unit (M.T., K.O.), Hitachi Ltd, Tokyo, Japan
| | - T Miyati
- Division of Health Sciences, Graduate School of Medical Science (T.M.), Kanazawa University, Kanazawa, Japan
| | - H Kasai
- From the Department of Radiology (N.A., H. Kasai, H. Kunitomo), Nagoya City University Hospital, Nagoya, Japan
| | - H Kunitomo
- From the Department of Radiology (N.A., H. Kasai, H. Kunitomo), Nagoya City University Hospital, Nagoya, Japan
| | - Y Shibamoto
- Departments of Radiology (H. Kan, M.O., Y.S.)
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8
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Yanagawa Y, Oode Y, Adegawa Y, Muramatsu KI, Kushida Y, Nagasawa H, Takeuchi I, Jitsuiki K, Ohsaka H, Omori K. Japanese civilian and US military interaction in the evacuation of casualties from Camp Fuji. BMJ Mil Health 2019; 166:e73-e74. [PMID: 31256003 DOI: 10.1136/jramc-2019-001247] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Revised: 06/14/2019] [Accepted: 06/18/2019] [Indexed: 11/04/2022]
Abstract
Historically, if US soldiers at Camp Fuji become severely ill or suffer trauma, they are transported by the ground ambulance, as the doctor-led air ambulance in eastern Shizuoka has never been permitted to land at Camp Fuji. However, it is widely recognised that severely ill or traumatised patients require time-dependent medical management. It was therefore agreed to undertake a joint exercise between the US medical assets of Camp Fuji and the doctor helicopters in eastern Shizuoka prefecture in evacuating a simulated severely ill or traumatised US soldier. The aim of this article is to describe the background and rationale between this collaboration between the civilian Japanese air ambulance and the US medical assets in Camp Fuji.
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Affiliation(s)
- Youichi Yanagawa
- Acute Critical Care Medicine, Juntendo Daigaku Igakubu Fuzoku Shizuoka Byoin, Izunokuni, Japan
| | - Y Oode
- Acute Critical Care Medicine, Juntendo Daigaku Igakubu Fuzoku Shizuoka Byoin, Izunokuni, Japan
| | - Y Adegawa
- Acute Critical Care Medicine, Juntendo Daigaku Igakubu Fuzoku Shizuoka Byoin, Izunokuni, Japan
| | - K-I Muramatsu
- Acute Critical Care Medicine, Juntendo Daigaku Igakubu Fuzoku Shizuoka Byoin, Izunokuni, Japan
| | - Y Kushida
- Acute Critical Care Medicine, Juntendo Daigaku Igakubu Fuzoku Shizuoka Byoin, Izunokuni, Japan
| | - H Nagasawa
- Acute Critical Care Medicine, Juntendo Daigaku Igakubu Fuzoku Shizuoka Byoin, Izunokuni, Japan
| | - I Takeuchi
- Acute Critical Care Medicine, Juntendo Daigaku Igakubu Fuzoku Shizuoka Byoin, Izunokuni, Japan
| | - K Jitsuiki
- Acute Critical Care Medicine, Juntendo Daigaku Igakubu Fuzoku Shizuoka Byoin, Izunokuni, Japan
| | - H Ohsaka
- Acute Critical Care Medicine, Juntendo Daigaku Igakubu Fuzoku Shizuoka Byoin, Izunokuni, Japan
| | - K Omori
- Acute Critical Care Medicine, Juntendo Daigaku Igakubu Fuzoku Shizuoka Byoin, Izunokuni, Japan
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9
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Omori K, Ito A, Mun I, Yamashita N, Ibano K, Lee H, Ueda Y. First principle calculations of energy of agglomerated helium in the period 6 elements. Nuclear Materials and Energy 2018. [DOI: 10.1016/j.nme.2018.07.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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10
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Yamashita N, Omori K, Kimura Y, Hinoki T, Ibano K, Lee H, Ueda Y. Surface morphology changes of silicon carbide by helium plasma irradiation. Nuclear Materials and Energy 2018. [DOI: 10.1016/j.nme.2018.06.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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11
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Rokutanda S, Yamada S, Yanamoto S, Omori K, Fujimura Y, Morita Y, Rokutanda H, Kohara H, Fujishita A, Nakamura T, Yoshimi T, Yoshida N, Umeda M. Comparison of osseous healing after sagittal split ramus osteotomy and intraoral vertical ramus osteotomy. Int J Oral Maxillofac Surg 2018; 47:1316-1321. [PMID: 29843949 DOI: 10.1016/j.ijom.2018.05.013] [Citation(s) in RCA: 8] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Revised: 03/16/2018] [Accepted: 05/09/2018] [Indexed: 10/16/2022]
Abstract
The sagittal split ramus osteotomy (SSRO) is generally associated with greater postoperative stability than the intraoral vertical ramus osteotomy (IVRO); however, it entails a risk of inferior alveolar nerve damage. In contrast, IVRO has the disadvantages of slow postoperative osseous healing and projection of the antegonial notch, but inferior alveolar nerve damage is believed to be less likely. The purposes of this study were to compare the osseous healing processes associated with SSRO and IVRO and to investigate changes in mandibular width after IVRO in 29 patients undergoing mandibular setback. On computed tomography images, osseous healing was similar in patients undergoing SSRO and IVRO at 1year after surgery. Projection of the antegonial notch occurred after IVRO, but returned to the preoperative state within 1year. The results of the study indicate that IVRO is equivalent to SSRO with regard to both bone healing and morphological recovery of the mandible.
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Affiliation(s)
- S Rokutanda
- Department of Clinical Oral Oncology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki City, Nagasaki, Japan; Department of Oral and Maxillofacial Surgery, Juko Memorial Nagasaki Hospital, Nagasaki City, Nagasaki, Japan.
| | - S Yamada
- Department of Dentistry and Oral Surgery, Shinshu University School of Medicine, Matsumoto City, Nagano, Japan
| | - S Yanamoto
- Department of Clinical Oral Oncology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki City, Nagasaki, Japan
| | - K Omori
- Department of Clinical Oral Oncology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki City, Nagasaki, Japan
| | - Y Fujimura
- Department of Orthodontics and Dentofacial Orthopaedics, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki City, Nagasaki, Japan
| | - Y Morita
- Department of Orthodontics and Dentofacial Orthopaedics, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki City, Nagasaki, Japan
| | - H Rokutanda
- Department of Orthodontics and Dentofacial Orthopaedics, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki City, Nagasaki, Japan
| | - H Kohara
- Department of Orthodontics and Dentofacial Orthopaedics, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki City, Nagasaki, Japan
| | - A Fujishita
- Department of Orthodontics and Dentofacial Orthopaedics, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki City, Nagasaki, Japan
| | - T Nakamura
- Department of Orthodontics and Dentofacial Orthopaedics, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki City, Nagasaki, Japan
| | - T Yoshimi
- Department of Orthodontics and Dentofacial Orthopaedics, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki City, Nagasaki, Japan
| | - N Yoshida
- Department of Orthodontics and Dentofacial Orthopaedics, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki City, Nagasaki, Japan
| | - M Umeda
- Department of Clinical Oral Oncology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki City, Nagasaki, Japan
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12
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Komatsu H, Rawson J, Barriga A, Gonzalez N, Mendez D, Li J, Omori K, Kandeel F, Mullen Y. Posttransplant oxygen inhalation improves the outcome of subcutaneous islet transplantation: A promising clinical alternative to the conventional intrahepatic site. Am J Transplant 2018; 18:832-842. [PMID: 28898528 DOI: 10.1111/ajt.14497] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Revised: 08/29/2017] [Accepted: 09/06/2017] [Indexed: 01/25/2023]
Abstract
Subcutaneous tissue is a promising site for islet transplantation, due to its large area and accessibility, which allows minimally invasive procedures for transplantation, graft monitoring, and removal of malignancies as needed. However, relative to the conventional intrahepatic transplantation site, the subcutaneous site requires a large number of islets to achieve engraftment success and diabetes reversal, due to hypoxia and low vascularity. We report that the efficiency of subcutaneous islet transplantation in a Lewis rat model is significantly improved by treating recipients with inhaled 50% oxygen, in conjunction with prevascularization of the graft bed by agarose-basic fibroblast growth factor. Administration of 50% oxygen increased oxygen tension in the subcutaneous site to 140 mm Hg, compared to 45 mm Hg under ambient air. In vitro, islets cultured under 140 mm Hg oxygen showed reduced central necrosis and increased insulin release, compared to those maintained in 45 mm Hg oxygen. Six hundred syngeneic islets subcutaneously transplanted into the prevascularized graft bed reversed diabetes when combined with postoperative 50% oxygen inhalation for 3 days, a number comparable to that required for intrahepatic transplantation; in the absence of oxygen treatment, diabetes was not reversed. Thus, we show oxygen inhalation to be a simple and promising approach to successfully establishing subcutaneous islet transplantation.
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Affiliation(s)
- H Komatsu
- Division of Developmental and Translational Diabetes and Endocrinology Research, Department of Diabetes and Metabolic Research, Beckman Research Institute of City of Hope, Duarte, CA, USA
| | - J Rawson
- Division of Developmental and Translational Diabetes and Endocrinology Research, Department of Diabetes and Metabolic Research, Beckman Research Institute of City of Hope, Duarte, CA, USA
| | - A Barriga
- Division of Developmental and Translational Diabetes and Endocrinology Research, Department of Diabetes and Metabolic Research, Beckman Research Institute of City of Hope, Duarte, CA, USA
| | - N Gonzalez
- Division of Developmental and Translational Diabetes and Endocrinology Research, Department of Diabetes and Metabolic Research, Beckman Research Institute of City of Hope, Duarte, CA, USA
| | - D Mendez
- Division of Developmental and Translational Diabetes and Endocrinology Research, Department of Diabetes and Metabolic Research, Beckman Research Institute of City of Hope, Duarte, CA, USA
| | - J Li
- Division of Developmental and Translational Diabetes and Endocrinology Research, Department of Diabetes and Metabolic Research, Beckman Research Institute of City of Hope, Duarte, CA, USA
| | - K Omori
- Division of Developmental and Translational Diabetes and Endocrinology Research, Department of Diabetes and Metabolic Research, Beckman Research Institute of City of Hope, Duarte, CA, USA
| | - F Kandeel
- Division of Developmental and Translational Diabetes and Endocrinology Research, Department of Diabetes and Metabolic Research, Beckman Research Institute of City of Hope, Duarte, CA, USA
| | - Y Mullen
- Division of Developmental and Translational Diabetes and Endocrinology Research, Department of Diabetes and Metabolic Research, Beckman Research Institute of City of Hope, Duarte, CA, USA
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13
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Ito S, Iwao H, Sakata J, Inoue M, Omori K, Yanagisawa Y. Simultaneous spawning by female stream goby Rhinogobius sp. and the association with brood cannibalism by nesting males. J Fish Biol 2016; 89:1592-1602. [PMID: 27325563 DOI: 10.1111/jfb.13060] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2015] [Accepted: 05/11/2016] [Indexed: 06/06/2023]
Abstract
A laboratory experiment was conducted by varying the undersurface area of nesting substratum and the number of females in an experimental tank to elucidate the determinants of the mating pattern in the stream goby, Rhinogobius sp. cross-band type. Males with larger nests tended to attract two or more females to their nest in a tank. Moreover, males spawned simultaneously with multiple females and entire brood cannibalism by males was rarely observed under a female-biased sex ratio. When males spawned with a single female with low fecundity, however, entire brood cannibalism occurred at a high frequency, suggesting that a male guarding a nest with fewer eggs consumes the brood. Therefore, spawning behaviour of females that leads to a large egg mass would decrease the risk of entire brood cannibalism. In this species, simultaneous spawning by multiple females in a nest serves as a female counter-measure against entire brood cannibalism. These results suggest that a conflict of interest between the sexes through brood cannibalism is a major determinant of simultaneous spawning.
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Affiliation(s)
- S Ito
- Hokkaido National Fisheries Research Institute, Fisheries Research Agency, 116 Katsurakoi, Kushiro, Hokkaido, 085-0802, Japan
| | - H Iwao
- Department of Biology, Ehime University, 2-5 Bunkyo-cho, Matsuyama, 790-8577, Japan
| | - J Sakata
- Department of Biology, Ehime University, 2-5 Bunkyo-cho, Matsuyama, 790-8577, Japan
| | - M Inoue
- Department of Biology, Ehime University, 2-5 Bunkyo-cho, Matsuyama, 790-8577, Japan
| | - K Omori
- Center for Marine Environmental Studies, Ehime University, 2-5 Bunkyo-cho, Matsuyama, 790-8577, Japan
| | - Y Yanagisawa
- Department of Biology, Ehime University, 2-5 Bunkyo-cho, Matsuyama, 790-8577, Japan
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14
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Omori K, Komatsu H, Rawson J, Mullen Y. Pharmacological strategies for protection of extrahepatic islet transplantation. MINERVA ENDOCRINOL 2015; 40:85-103. [PMID: 25651758] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The safety and effectiveness of islet transplantation has been proven through world-wide trials. However, acute and chronic islet loss has hindered the ultimate objective of becoming a widely used treatment option for type 1 diabetes. A large islet loss is attributed, in part, to the liver being a less-than-optimal site for transplantation. Over half of the transplanted islets are destroyed shortly after transplantation due to direct exposure to blood and non-specific inflammation. Successfully engrafted islets are continuously exposed to the liver micro-environment, a unique immune system, low oxygen tension, toxins and high glucose, which is toxic to islets, leading to premature islet dysfunction/death. Investigations have continued to search for alternate sites to transplant islets that provide a better environment for prolonged function and survival. This article gathers courses and conditions that lead to islet loss, from organ procurement through islet transplantation, with special emphasis on hypoxia, oxidative stress, and antigen non-specific inflammation, and reviews strategies using pharmacological agents that have shown effectiveness in protecting islets, including a new treatment approach utilizing siRNA. Pharmacological agents that support islet survival and promote β-cell proliferation are also included. Treatment of donor pancreata and/or islets with these agents should increase the effectiveness of islets transplanted into extrahepatic sites. Furthermore, the development of methods designed to release these agents over an extended period, will further increase their efficacy. This requires the combined efforts of both islet transplant biologists and bioengineers.
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Affiliation(s)
- K Omori
- Division of Developmental and Translational, Research and Cellular Therapeutics, City of Hope, Diabetes and Metabolism Research Institute, Duarte, CA, USA -
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15
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Omori K, Kida T, Hori M, Ozaki H, Murata T. Multiple roles of the PGE2 -EP receptor signal in vascular permeability. Br J Pharmacol 2014; 171:4879-89. [PMID: 24923772 DOI: 10.1111/bph.12815] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2014] [Revised: 05/25/2014] [Accepted: 05/29/2014] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND AND PURPOSE PGE2 is a major prostanoid that regulates inflammation by stimulating EP1-4 receptors. However, how PGE2 induces an initial inflammatory response to vascular hyper-permeability remains unknown. Here we investigated the role of the PGE2 -EP receptor signal in modulating vascular permeability both in vivo and in vitro. EXPERIMENTAL APPROACH We used a modified Miles assay and intravital microscopy to examine vascular permeability in vivo. Endothelial barrier property was assessed by measuring transendothelial electrical resistance (TER) in vitro. KEY RESULTS Local administration of PGE2 , an EP2 or EP4 receptor agonist into FVB/NJcl mouse ear skin caused vascular leakage, indicated by dye extravasation. Intravital microscopy and laser Doppler blood-flow imaging revealed that these treatments dilated peripheral vessels and increased local blood flow. Pretreatment with the vasoconstrictor phenylephrine inhibited the PGE2 -induced blood flow increase and vascular leakage. In contrast to the EP2 and EP4 receptor agonists, administration of an EP3 receptor agonist suppressed vascular leakage without altering vascular diameter or blood flow. In isolated HUVECs, the EP3 receptor agonist elevated TER and blocked thrombin-induced dextran passage. Inhibiting PKA restored the hypo-permeability induced by the EP3 receptor agonist. CONCLUSIONS AND IMPLICATIONS Activation of the PGE2 -EP2 or -EP4 receptor signal induces vasodilatation in mural cells, resulting in increased local blood flow and hyper-permeability. In contrast, activation of the PGE2 -EP3 receptor signal induces a cAMP-dependent enhancement of the endothelial barrier, leading to hypo-permeability. We provide the first evidence that endothelial cells and mural cells cooperate to modulate vascular permeability.
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Affiliation(s)
- K Omori
- Department of Animal Radiology, Graduate School of Agriculture and Life Sciences, University of Tokyo, Tokyo, Japan
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16
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Mera T, Itoh T, Kita S, Kodama S, Kojima D, Nishinakamura H, Okamoto K, Ohkura M, Nakai J, Iyoda T, Iwamoto T, Matsuda T, Baba A, Omori K, Ono J, Watarai H, Taniguchi M, Yasunami Y. Pretreatment of donor islets with the Na(+) /Ca(2+) exchanger inhibitor improves the efficiency of islet transplantation. Am J Transplant 2013; 13:2154-60. [PMID: 23746308 DOI: 10.1111/ajt.12306] [Citation(s) in RCA: 14] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2013] [Revised: 04/15/2013] [Accepted: 04/16/2013] [Indexed: 01/25/2023]
Abstract
Pancreatic islet transplantation is an attractive therapy for the treatment of insulin-dependent diabetes mellitus. However, the low efficiency of this procedure necessitating sequential transplantations of islets with the use of 2-3 donors for a single recipient, mainly due to the early loss of transplanted islets, hampers its clinical application. Previously, we have shown in mice that a large amount of HMGB1 is released from islets soon after their transplantation and that this triggers innate immune rejection with activation of DC, NKT cells and neutrophils to produce IFN-γ, ultimately leading to the early loss of transplanted islets. Thus, HMGB1 release plays an initial pivotal role in this process; however, its mechanism remains unclear. Here we demonstrate that release of HMGB1 from transplanted islets is due to hypoxic damage resulting from Ca(2+) influx into β cells through the Na(+) /Ca(2+) exchanger (NCX). Moreover, the hypoxia-induced β cell damage was prevented by pretreatment with an NCX-specific inhibitor prior to transplantation, resulting in protection and long-term survival of transplanted mouse and human islets when grafted into mice. These findings suggest a novel strategy with potentially great impact to improve the efficiency of islet transplantation in clinical settings by targeting donor islets rather than recipients.
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Affiliation(s)
- T Mera
- Central Research Institute for Islet Biology, Fukuoka University, Fukuoka, Japan
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17
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Abstract
The major functions required for load-bearing orthopaedic implants are load-bearing and mechanical or biological fixation with the surrounding bone. Porous materials with appropriate mechanical properties and adequate pore structure for fixation are promising candidates for load-bearing implant material. In previous work, the authors developed a novel titanium (Ti) foam sheet 1-2mm thick by an original slurry foaming method. In the present work, novel Ti foam is developed with mechanical properties compatible with cortical bone and biological fixation capabilities by layer-by-layer stacking of different foam sheets with volumetric porosities of 80% and 17%. The resulting multilayer Ti foam exhibited a Young's modulus of 11-12GPa and yield strength of 150-240MPa in compression tests. In vitro cell culture on the sample revealed good cell penetration in the higher-porosity foam (80% volumetric porosity), which reached 1.2mm for 21 days of incubation. Cell penetration into the high-porosity layers of a multilayer sample was good and not influenced by the lower-porosity layers. Calcification was also observed in the high-porosity foam, suggesting that this Ti foam does not inhibit bone formation. Contradictory requirements for high volumetric porosity and high strength were attained by role-sharing between the foam sheets of different porosities. The unique characteristics of the present multilayer Ti foam make them attractive for application in the field of orthopaedics.
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Affiliation(s)
- K Kato
- Mitsubishi Material Corp., 1-297 Kitabukuro-cho, Omiya-ku, Saitama 330-8508, Japan.
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Omori K, Mitsuhashi M, Ishiyama K, Nair I, Rawson J, Todorov I, Kandeel F, Mullen Y. mRNA of the pro-apoptotic gene BBC3 serves as a molecular marker for TNF-α-induced islet damage in humans. Diabetologia 2011; 54:2056-66. [PMID: 21567299 DOI: 10.1007/s00125-011-2183-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2010] [Accepted: 04/04/2011] [Indexed: 12/23/2022]
Abstract
AIMS/HYPOTHESIS TNF-α plays important roles in the pathogenesis of type 1 and type 2 diabetes mellitus. In light of this, we examined the involvement of a pro-apoptotic gene, BBC3 (also known as PUMA), in TNF-α-mediated beta cell dysfunction and destruction in human islets. METHODS Human islets were exposed in vitro to TNF-α alone or in combination with IFN-γ. Gene expression was assessed by RT-PCR using a set of single islets. Protein abundance and cellular localisation of BBC3 were assessed by immunoblot and immunohistochemistry. A marginal number of islets were transplanted into diabetic NODscid mice to correlate in vivo islet function with BBC3 expression. RESULTS BBC3 and IL8 mRNA were upregulated in TNF-α-stimulated islets in a dose-dependent manner and enhanced through addition of IFN-γ, but not upregulated by IFN-γ alone. Immunohistochemistry revealed that TNF-α in combination with IFN-γ upregulated basal BBC3 abundance in the cytoplasm of beta cells along with the perinuclear clustering of mitochondria partially co-localised with BBC3. TNF-α alone did not induce beta cell death, but did abrogate preproinsulin precursor mRNA synthesis in response to high glucose stimulation, which was inversely associated with upregulation of BBC3 mRNA expression by TNF-α. Higher BBC3 mRNA expression in islets correlated with decreased graft function in vivo. CONCLUSIONS/INTERPRETATION These results suggest that BBC3 mRNA can serve as a molecular marker to detect early TNF-α-induced beta cell stress and may help identify islet-protective compounds for the treatment of diabetes.
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Affiliation(s)
- K Omori
- Beckman Research Institute of the City of Hope, 1500 East Duarte Rd, Duarte, CA 91010, USA.
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Naruishi K, Omori K, Maeda H, Sonoi N, Funakoshi K, Hirai K, Ishii M, Kubo K, Kobayashi H, Tomiyama T, Yamamoto D, Tanimoto I, Kunimatsu K, Takashiba S. Immune responses to porphyromonas gingivalis infection suppress systemic inflammatory response in experimental murine model. J BIOL REG HOMEOS AG 2011; 25:195-202. [PMID: 21880208] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Periodontitis is a localized infectious disease caused by periodontopathic bacteria such as Porphyromonas gingivalis (P. gingivalis), and the severity correlates to significance of immune responses. Recently, it has been reported that periodontitis is associated with the development of systemic disease such as diabetes and atherosclerosis because of increasing invasion of oral pathogens to the circulation. However, the association between local and systemic infectious responses is still unclear. In the present study, we examined the differences of biological responses in animals with or without bacterial infection. After Balb/c mice were infected subcutaneously with live P. gingivalis W83, serum, skin and liver were collected according to experimental protocol. The skin and liver tissues were observed pathologically by haematoxylin-eosin staining, and serum IL-6 levels were measured using ELISA method. Throughout the experimental period, conditions of the mice were observed continuously. As expected, severe infiltration of leukocytes were observed at inflamed skin corresponding to the number of bacterial challenges. Although no inflammatory appearance of skin was observed, serum IL-6 levels were increased dramatically (P <0.01, Student's t-test) and liver tissues were injured in the mice without bacterial challenge. Interestingly, although severe inflammatory appearance of the skin was observed, serum IL-6 levels were not increased and no inflammatory responses were observed in the liver of the 3-times bacterially challenged group. Importantly, immunoglobulin G against P. gingivalis W83 was detected in the blood of mice with 3-times bacterial challenge corresponding to improvement of weight loss and survival. In conclusion, although multiple infections develop severe localized inflammation, the immune system should be sufficient to protect the systemic inflammatory responses.
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Affiliation(s)
- K Naruishi
- Division of Endodontology, Iwate Medical University, Department of Conservative Dentistry and Oral Rehabilitation, Morioka, Japan.
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Matsui T, Ogawa H, Yamada N, Baba Y, Nomoto M, Omori K. Outcome of cochlear implantation in children with congenital cytomegalovirus infection and GJB2 mutation in relation to developmental disorder. Laryngoscope 2011. [DOI: 10.1002/lary.22282] [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: 11/08/2022]
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Yamasaki K, Omori K, Takaoka EI, Sekido N, Shigai M, Mori K, Minami M, Watanabe Y, Shimazui T, Akaza H. Successful Management by Provocative Angiography and Endovascular Stent of Ureteroarterial Fistula in a Patient with a Long-term Indwelling Ureteral Stent. Jpn J Clin Oncol 2009; 40:267-70. [DOI: 10.1093/jjco/hyp154] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Abstract
Phosphoinositide-dependent kinase (PDK1) plays a central role in signal transduction mediated by phosphatidylinositol 3-kinases (PI3K) and regulates cellular functions in neutrophils. Neutrophils from individuals diagnosed with localized aggressive periodontitis (LAP) present an in vivo phenotype with depressed chemotaxis. The aim of this study was to test the hypothesis that PDK1 regulates chemotaxis in neutrophils and is responsible for the abnormal neutrophil chemotaxis LAP. Neutrophil chemotaxis was significantly suppressed by the PDK1 inhibitor staurosporine. When cells were transfected with PDK1 siRNA, there was a significant reduction in chemotaxis, while superoxide generation was not significantly affected. In primary neutrophils from persons with LAP, PDK1 expression and activation levels were significantly reduced, and this reduction was associated with the reduced phosphorylation of Akt (Thr308) and chemotaxis. Analysis of these data demonstrates that PDK1 is essential for the chemotactic migration of neutrophils, and in the absence of PDK1, neutrophil chemotaxis is impaired.
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Affiliation(s)
- M Yagi
- Department of Periodontology and Oral Biology, Goldman School of Dental Medicine, Boston University, 100 East Newton Street, Suite 107, Boston, MA 02118, USA
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Affiliation(s)
- T Kajiya
- Department of General Internal Medicine, Oshima Medical Association Hospital, Kagoshima, Japan.
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Herrera BS, Ohira T, Gao L, Omori K, Yang R, Zhu M, Muscara MN, Serhan CN, Van Dyke TE, Gyurko R. An endogenous regulator of inflammation, resolvin E1, modulates osteoclast differentiation and bone resorption. Br J Pharmacol 2008; 155:1214-23. [PMID: 18806821 DOI: 10.1038/bjp.2008.367] [Citation(s) in RCA: 101] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
BACKGROUND AND PURPOSE The inflammation-resolving lipid mediator resolvin E1 (RvE1) effectively stops inflammation-induced bone loss in vivo in experimental periodontitis. It was of interest to determine whether RvE1 has direct actions on osteoclast (OC) development and bone resorption. EXPERIMENTAL APPROACH Primary OC cultures derived from mouse bone marrow were treated with RvE1 and analysed for OC differentiation, cell survival and bone substrate resorption. Receptor binding was measured using radiolabelled RvE1. Nuclear factor (NF)-kappaB activation and Akt phosphorylation were determined with western blotting. Lipid mediator production was assessed with liquid chromatography tandem mass spectrometry. KEY RESULTS OC growth and resorption pit formation were markedly decreased in the presence of RvE1. OC differentiation was inhibited by RvE1 as demonstrated by decreased number of multinuclear OC, a delay in the time course of OC development and attenuation of receptor activator of NF-kappaB ligand-induced nuclear translocation of the p50 subunit of NF-kappaB. OC survival and apoptosis were not altered by RvE1. Messenger RNA for both receptors of RvE1, ChemR23 and BLT(1) is expressed in OC cultures. Leukotriene B(4) (LTB(4)) competed with [(3)H]RvE1 binding on OC cell membrane preparations, and the LTB(4) antagonist U75302 prevented RvE1 inhibition of OC growth, indicating that BLT(1) mediates RvE1 actions on OC. Primary OC synthesized the RvE1 precursor 18R-hydroxy-eicosapentaenoic acid and LTB(4). Co-incubation of OC with peripheral blood neutrophils resulted in transcellular RvE1 biosynthesis. CONCLUSIONS AND IMPLICATIONS These results indicate that RvE1 inhibits OC growth and bone resorption by interfering with OC differentiation. The bone-sparing actions of RvE1 are in addition to inflammation resolution, a direct action in bone remodelling.
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Affiliation(s)
- B S Herrera
- Department of Periodontology and Oral Biology, Goldman School of Dental Medicine, Boston University, Boston, MA 2118, USA
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Omori K, Valiente L, Orr C, Rawson J, Ferreri K, Todorov I, Al-Abdullah IH, Medicherla S, Potter AA, Schreiner GF, Kandeel F, Mullen Y. Improvement of human islet cryopreservation by a p38 MAPK inhibitor. Am J Transplant 2007; 7:1224-32. [PMID: 17331110 DOI: 10.1111/j.1600-6143.2007.01741.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [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: 01/25/2023]
Abstract
The activation of p38 mitogen-activated protein kinase (MAPK) has been shown to cause ischemia/reperfusion injury of several organs used for transplantation and also to play a significant role in primary islet graft nonfunction. Activation of p38 MAPK may also occur during islet cryopreservation and thawing. In this study, a p38 MAPK inhibitor (p38IH) was applied to human islet cryopreservation to improve islet yield and quality after thawing. Under serum-free conditions, human islets were cryopreserved, thawed and cultured using our standard procedures. Three types of solutions were tested: conventional RPMI1640 medium (RPMI), a newly developed islet cryopreservation solution (ICS), and ICS supplemented with a p38IH, SD-282 (ICS-p38IH). Activation or inhibition of p38 MAPK was demonstrated by the diminished phosphorylation of HSP27 substrate. Islet recovery on day 2 after thawing was highest with ICS-p38IH and islet viability was not significantly different in the three groups. beta Cell numbers and function were the highest in islets cryopreserved with ICS-p38IH. Glucose-stimulated human C-peptide levels were 86% of that of the nonfrozen islets when measured 4 weeks after transplantation into NODscid mice. This improvement may provide an opportunity to establish islet banks and allow the use of cryopreserved islets for clinical transplantation.
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Affiliation(s)
- K Omori
- Southern California Islet Cell Resources Center, Department of Diabetes, Endocrinology and Metabolism, City of Hope National Medical Center/Beckman Research Institute, Duarte, CA, USA.
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Narita I, Alchi B, Omori K, Sato F, Ajiro J, Saga D, Kondo D, Skatsume M, Maruyama S, Kazama JJ, Akazawa K, Gejyo F. Etiology and prognostic significance of severe uremic pruritus in chronic hemodialysis patients. Kidney Int 2006; 69:1626-32. [PMID: 16672924 DOI: 10.1038/sj.ki.5000251] [Citation(s) in RCA: 210] [Impact Index Per Article: 11.7] [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: 02/01/2023]
Abstract
Although uremia is well known as the most common cause of pruritus, the mechanisms of pruritus in chronic hemodialysis patients remain unclear. The purpose was to characterize uremic pruritus in more detail and to investigate whether severe pruritus is a marker for poor prognosis. A total of 1773 adult hemodialysis patients were studied. A questionnaire was given to each patient to assess the intensity and frequency, as well as pruritus-related sleep disturbance. We analyzed the relationship between clinical and laboratory data and the severity of pruritus in hemodialysis patients and followed them for 24 months prospectively. In total, 453 patients had severe pruritus with a visual analogue scale (VAS) score more than or equal to 7.0. Among them, more than 70% complained of sleep disturbance, whereas the majority of patients with a VAS score of less than 7.0 had no sleep disturbance. Male gender, high levels of blood urea nitrogen, beta2-microglobulin (beta2MG), hypercalcemia, and hyperphosphatemia were identified as independent risk factors for the development of severe pruritus, whereas a low level of calcium and intact-parathyroid hormone were associated with reduced risk. During the follow-up, 171 (9.64%) patients died. The prognosis of patients with severe pruritus was significantly worse than the others. Moreover, severe pruritus was independently associated with death even after adjusting for other clinical factors including diabetes mellitus, age, beta2MG, and albumin. Severe uremic pruritus caused by multiple factors, not only affects the quality of life but may also be associated with poor outcome in chronic hemodialysis patients.
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Affiliation(s)
- I Narita
- Division of Clinical Nephrology and Rheumatology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan.
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Angkawidjaja C, Kuwahara K, Omori K, Koga Y, Takano K, Kanaya S. Extracellular secretion of Escherichia coli alkaline phosphatase with a C-terminal tag by type I secretion system: purification and biochemical characterization. Protein Eng Des Sel 2006; 19:337-43. [PMID: 16714338 DOI: 10.1093/protein/gzl017] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [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: 11/14/2022] Open
Abstract
Type I secretion system (TISS) of Gram-negative bacteria permits proteins to be secreted directly from the cytoplasm to the external medium by a single, energy-coupled step. To examine whether this system can be used as an extracellular production system of recombinant proteins, Escherichia coli alkaline phosphatase (AP) was fused to a C-terminal region of Pseudomonas sp. MIS38 lipase (PML) and examined for secretion using the E.coli cells carrying the heterologous TISS. PML is one of the passenger proteins of TISS and contains 12 repetitive sequences and a secretion signal at the C-terminal region. The fusion protein was efficiently secreted to the extracellular medium, while AP was not secreted at all, indicating that the secretion of AP is promoted by a secretion signal of PML. The repetitive sequences were not so important for secretion of the fusion protein, because the secretion level of the fusion protein containing entire repeats ( approximately 10 mg/l culture) was only 2-fold higher than that of the fusion protein without repeats. The fusion protein purified from the culture supernatant existed as a homodimer, like AP, and was indistinguishable from AP in enzymatic properties and stability.
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Affiliation(s)
- C Angkawidjaja
- Department of Material and Life Science, Graduate School of Engineering, Osaka University 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
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Todorov I, Nair I, Ferreri K, Rawson J, Kuroda A, Pascual M, Omori K, Valiente L, Orr C, Al-Abdullah I, Riggs A, Kandeel F, Mullen Y. Multipotent progenitor cells isolated from adult human pancreatic tissue. Transplant Proc 2006; 37:3420-1. [PMID: 16298614 DOI: 10.1016/j.transproceed.2005.09.088] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The supply of islet cells is a limiting factor for the widespread application of islet transplantation of type-1 diabetes. Islets constitute 1% to 2% of pancreatic tissue, leaving approximately 98% as discard after islet isolation and purification. In this report we present our data on the isolation of multipotent progenitor cells from discarded adult human pancreatic tissue. The collected cells from discarded nonislet fractions, after enzymatic digestion and gradient purification of islets, were dissociated for suspension culture in a serum-free medium. The cell clusters grown to a size of 100 to 150 mum contained cells staining for stage-specific embryonic antigens, but not insulin or C-peptide. To direct cell differentiation toward islets, clusters were recultured in a pancreatic differentiation medium. Insulin and C-peptide-positive cells by immunocytochemistry appeared within a week, reaching over 10% of the cell population. Glucagon and somatostatin-positive cells were also detected. The cell clusters were found to secrete insulin in response to glucose stimulation. Cells from the same clusters also had the capacity for differentiation into neural cells, as documented by staining for neural and glial cell markers when cultured as monolayers in media containing neurotrophic factors. These data suggest that multipotent pancreatic progenitor cells exist within the human pancreatic tissue that is typically discarded during islet isolation procedures. These adult progenitor cells can be successfully differentiated into insulin-producing cells, and thus they have the potential for treatment of type-1 diabetes mellitus.
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Affiliation(s)
- I Todorov
- Southern California Islet Cell Resource Center, Department of Diabetes, Endocrinology and Metabolism, City of Hope National Medical Center, 1500 East Duarte Road, Duarte, CA 91010, USA.
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Shanmugam N, Todorov IT, Nair I, Omori K, Reddy MA, Natarajan R. Increased expression of cyclooxygenase-2 in human pancreatic islets treated with high glucose or ligands of the advanced glycation endproduct-specific receptor (AGER), and in islets from diabetic mice. Diabetologia 2006; 49:100-7. [PMID: 16341840 DOI: 10.1007/s00125-005-0065-7] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/07/2005] [Accepted: 08/30/2005] [Indexed: 11/27/2022]
Abstract
AIMS/HYPOTHESIS The cyclooxygenase-2 (PTGS2, previously known as COX2) enzyme and its products, such as prostaglandin E(2) (PGE(2)), have been implicated in the pathogenesis of several inflammatory diseases including islet dysfunction under diabetic conditions. In this study we evaluated whether diabetic conditions in vitro, such as high-glucose (HG) culture or AGE, or in vivo in animal models of diabetes can induce PTGS2 expression and activity in pancreatic islets. MATERIALS AND METHODS Isolated human pancreatic islets were treated for 24 h with HG (25 mmol/l) or with S100b (5 mg/l), a specific ligand for the AGE-specific receptor. PTGS2 and cyclooxygenase-1 (PTGS1, previously known as COX1) mRNA, protein expression and product PGE(2) were analysed by RT-PCR, Western blots and specific enzyme immunoassay respectively. Islet PTGS2 production in animal models was assessed by immunofluorescence. RESULTS Treatment of human pancreatic islets with HG and S100b led to a three-five-fold induction of PTGS2 mRNA (p<0.001). PTGS2 protein and its product PGE(2) (351.4+/-13.05 fg/ml vs control 39.4+/-0.11 fg/ml) were also increased (p<0.001). Pretreatment with specific inhibitors demonstrated the involvement of protein kinase C and oxidant stress in S100b- and HG-induced PTGS2 expression. However, insulin secretion was not significantly altered by S100b. Double immunofluorescent staining showed increased PTGS2 production in pancreatic islets from diabetic mice relative to corresponding controls. CONCLUSION/INTERPRETATION These results show for the first time that diabetes as well as diabetic conditions such as AGE and HG in vitro can directly upregulate the expression of the inflammatory PTGS2 gene in pancreatic islets. This might contribute to the pathogenesis of islet dysfunction in diabetes.
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Affiliation(s)
- N Shanmugam
- Gonda Diabetes Centre, Beckman Research Institute of City of Hope, 1500 East Duarte Road, Duarte, CA 91010, USA
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Kazama JJ, Omori K, Takahashi N, Ito Y, Maruyama H, Narita I, Gejyo F, Iwasaki Y, Fukagawa M. Maxacalcitol therapy decreases circulating osteoprotegerin levels in dialysis patients with secondary hyperparathyroidism. Clin Nephrol 2005; 64:64-8. [PMID: 16047647 DOI: 10.5414/cnp64064] [Citation(s) in RCA: 5] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Osteoprotegerin is a natural glycoprotein which plays a critical role in osteoclast physiology. Elevated levels of circulating osteoprotegerin may account for the development of bone and mineral metabolic abnormalities in uremia. Little is known about the effects of vitamin D therapy on the circulating osteoprotegerin levels in dialysis patients. PATIENTS AND METHODS Fifty chronic dialysis patients whose plasma intact PTH levels were greater than 300 pg/ml were analyzed for the study. Following a four-week washout time during which all vitamin D administration was halted, 10 microg of maxacalcitol was intravenously injected thrice a week. RESULTS The circulating intact PTH, bone-specific alkaline phosphatase and intact osteocalcin levels were significantly lowered, while the serum calcium levels were elevated after the therapy. The osteoprotegerin levels significantly decreased after the therapy (p < 0.0001). CONCLUSION Maxacalcitol therapy reduced the circulating osteoprotegerin levels and improved secondary hyperparathyroidism. The observed effects were the opposite of those expected from previous in vitro studies. Osteoprotegerin may mediate and/or modify the effect of active vitamin D therapy in dialysis patients.
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Affiliation(s)
- J J Kazama
- Division of Clinical Nephrology and Rheumatology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan.
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Kawai E, Akatsuka H, Sakurai N, Idei A, Matsumae H, Shibatani T, Komatsubara S, Omori K. Isolation and analysis of lipase-overproducing mutants of Serratia marcescens. J Biosci Bioeng 2005; 91:409-15. [PMID: 16233013 DOI: 10.1263/jbb.91.409] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2000] [Accepted: 01/31/2001] [Indexed: 11/17/2022]
Abstract
We have isolated a lipase-overproducing mutant, GE14, from Serratia marcescens 8000 after three rounds of N-methyl-N'-nitro-N-nitrosoguanidine mutagenesis. The mutant GE14 produced 95 kU/ml of extracellular lipase in the lipase medium, which was about threefold higher than that of produced by the original strain 8000. Enzymatic characteristics including specific activity of purified lipases from culture supernatants of GE14 and 8000 were almost same. The lipase gene (lipA) of GE14 contained two base substitutions; one in the promoter region and another in the N-terminal region of the lipA gene without an amino acid substitution. Promoter analysis using lipA-lacZ fusion plasmids revealed that these substitutions were responsible for the increase in the lipA expression level, independently. In contrast, no base substitution was found in the genes encoding the lipase secretion device, the Lip system. In addition, the genes coding for metalloprotease and the cell surface layer protein which are both secreted through the Lip system and associated with extracellular lipase production, also contained no base substitution. The strain GE14 carrying a high-copy-number lipA plasmid produced a larger amount of the extracellular lipase than the recombinant strains of 8000 and other mutants also did, indicating that GE14 was not only a lipase-overproducing strain, but also an advantageous host strain for overproducing the lipase by a recombinant DNA technique. These results suggest that the lipase-overproducing mutant GE14 and its recombinant strains are promising candidates for the industrial production of the S. marcescens lipase.
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Affiliation(s)
- E Kawai
- Discovery Research Laboratory, Tanabe Seiyaku Co. Ltd., Yodogawa-ku, Osaka 532-8505. Japan
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Omori K, Valiente L, Orr C, Rawson J, Ferreri K, Todorov I, Medicherla S, Protter AA, Schreiner GF, Riggs AD, Kandeel F, Mullen Y. Inhibition of p38 Mitogen-Activated Protein Kinase Protects Human Islets From Cryoinjury and Improves the Yield, Viability, and Quality of Frozen-Thawed Islets. Transplant Proc 2005; 37:3422-3. [PMID: 16298615 DOI: 10.1016/j.transproceed.2005.09.089] [Citation(s) in RCA: 3] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
The development of an optimal islet cryopreservation method will permit transplantation of islets from multiple donors in a single procedure and contribute to alleviation of the islet shortage. In this study, we have improved human islet cryopreservation methods under serum-free conditions using an intracellular-based islet cryopreservation solution (ICS), especially supplemented with a p38 pathway inhibitor (p38IH) to suppress p38 mitogen-activated protein kinase (MAPK) activation. Three different solutions were compared for freezing and thawing of human islets (1) conventional RPMI1640 medium, (2) ICS, and (3) ICS supplemented with a p38IH, SD-282 (ICS-p38IH). Islet cryopreservation with ICS-p38IH significantly improved islet recovery, viability, and quality after thawing of cryopreserved islets. This improvement may allow the use of cryopreserved islets in clinical islet transplantation.
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Affiliation(s)
- K Omori
- Department of Diabetes, Endocrinology and Metabolism, City of Hope National Medical Center/Beckman Research Institute, 1500 East Duarte Road, Duarte, CA 91010, USA
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Narita I, Goto S, Saito N, Song J, Omori K, Kondo D, Sakatsume M, Gejyo F. Renoprotective efficacy of renin-angiotensin inhibitors in IgA nephropathy is influenced by ACE A2350G polymorphism. J Med Genet 2004; 40:e130. [PMID: 14684698 PMCID: PMC1735349 DOI: 10.1136/jmg.40.12.e130] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Song J, Sakatsume M, Narita I, Goto S, Omori K, Takada T, Saito N, Ueno M, Gejyo F. Peroxisome proliferator-activated receptor γ C161T polymorphisms and survival of Japanese patients with immunoglobulin A nephropathy. Clin Genet 2003; 64:398-403. [PMID: 14616762 DOI: 10.1034/j.1399-0004.2003.00154.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [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: 12/13/2022]
Abstract
Peroxisome proliferator-activated receptor gamma (PPAR gamma) plays an important role in lipid metabolism, insulin sensitivity, atherogenesis, and immune regulation. A genetic polymorphism (C161T) at exon 6 of PPAR gamma gene (PPARG) was reported to be associated with the onset of coronary artery disease. However, there has been no report of an association with renal disease. Genomic DNAs were isolated from 225 Japanese patients with histologically confirmed immunoglobulin A nephropathy (IgAN). The PPARG C161T genotype was determined by polymerase chain reaction-restriction fragment length polymorphism. The association of the polymorphism with renal prognosis in IgAN patients was analyzed using the Kaplan-Meier method and Cox proportional hazard regression model. The PPARG polymorphism was not associated with the renal survival rate. However, when patients were stratified into those either with or without hypertension at the time of diagnosis, the renal survival of the CT/TT genotypes was significantly better in those without hypertension than those with the CC genotype. We report that the PPARG C161T polymorphism is associated with the survival of IgAN patients without hypertension. The T allele of the polymorphism might have a protective effect on the progression of IgAN.
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Affiliation(s)
- J Song
- Division of Clinical Nephrology and Rheumatology, Niigata University Graduate School of Medical and Dental Sciences, Asahimachi-dori, Niigata, Japan
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36
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Yang L, Omori K, Omori K, Otani H, Suzukawa J, Inagaki C. GABAC receptor agonist suppressed ammonia-induced apoptosis in cultured rat hippocampal neurons by restoring phosphorylated BAD level. J Neurochem 2003; 87:791-800. [PMID: 14535961 DOI: 10.1046/j.1471-4159.2003.02069.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.6] [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: 11/20/2022]
Abstract
Ammonia-induced apoptosis and its prevention by GABAC receptor stimulation were examined using primary cultured rat hippocampal neurons. Ammonia (0.5-5 mm NH4Cl) dose-dependently induced apoptosis in pyramidal cell-like neurons as assayed by double staining with Hoechst 33258 and anti-neurofilament antibody. A GABAC receptor agonist, cis-4-aminocrotonic acid (CACA, 200 microm), but not GABAA and GABAB receptor agonists, muscimol (10 micro m) and baclofen (50 microm), respectively, inhibited the ammonia (2 mm)-induced apoptosis, and this inhibition was abolished by a GABAC receptor antagonist (1,2,5,6-tetrahydropyridin-4-yl)methylphosphinic acid (TPMPA, 15 microm). Expression of all three GABAC receptor subunits was demonstrated in the cultured neurons by RT-PCR. The ammonia-treatment also activated caspases-3 and -9 as observed in immunocytochemistry for PARP p85 and western blot. Such activation of the caspases was again inhibited by CACA in a TPMPA-sensitive manner. The anti-apoptotic effect of CACA was blocked by inhibitors for MAP kinase kinase and cAMP-dependent protein kinase, PD98059 (20 microm) and KT5720 (1 microm), suggesting possible involvement of an upstream pro-apoptotic protein, BAD. Levels of phospho-BAD (Ser112 and Ser155) were decreased by the ammonia-treatment and restored by coadministration of CACA. These findings suggest that GABAC receptor stimulation protects hippocampal pyramidal neurons from ammonia-induced apoptosis by restoring Ser112- and Ser155-phospho-BAD levels.
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Affiliation(s)
- Li Yang
- Department of Pharmacology, Kansai Medical University, Moriguchi, Osaka, Japan
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37
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Matsuda H, Oishi K, Omori K. Errata. J Physiol 2003. [DOI: 10.1113/jphysiol.2003.549002] [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: 11/08/2022] Open
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38
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Song J, Narita I, Goto S, Saito N, Omori K, Sato F, Ajiro J, Saga D, Kondo D, Sakatsume M, Gejyo F. Gender specific association of aldosterone synthase gene polymorphism with renal survival in patients with IgA nephropathy. J Med Genet 2003; 40:372-6. [PMID: 12746403 PMCID: PMC1735447 DOI: 10.1136/jmg.40.5.372] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Abstract
The mechanism of inward rectification was investigated by recording single-channel currents through an inwardly rectifying K+ channel (Kir2.1). cDNA encoding a wild-type (WT) channel, a mutant replacing Asp 172 with Asn (D172N), and a tandem tetramer WT-(D172N)2-WT, was transfected into COS-1 cells using the liposome method, and after 48-72 h single-channel currents were recorded in the inside-out configuration at 150 mM internal and external K+. Steady-state open probability of outward currents decreased with larger depolarizations. The activation curve was fitted with a single Boltzmann equation. The voltages of half-activation in the absence of spermine were +35.9 mV (WT), +55.0 mV (WT-(D172N)2-WT) and +76.7 mV (D172N). Open-time and zero-current-time histograms were constructed. The open-time histogram was fitted with a single exponential function. Two exponential functions were necessary to fit the closed-time histogram. In each channel, internal spermine at a concentration of 1-100 nM reduced the open time of the outward currents in a concentration-dependent manner and produced one blocked state without affecting the inward currents, suggesting that spermine acts as an open channel blocker. The normalized steady-state open probability-spermine concentration curve was fitted by saturation kinetics with a Hill coefficient of 1. On the assumption of the linear sequential state model, the unblock and blocking rates were estimated in each channel. Unblock rates depended on the number of D172N mutant subunits, but blocking rates did not. The results suggest that closing gates work independently of the spermine block and D172 is involved in both intrinsic gating and the spermine block.
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Affiliation(s)
- Hiroko Matsuda
- Department of Physiology, Kansai Medical University, Moriguchi, Osaka, Japan.
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40
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41
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Okuno S, Kondo M, Yamasaki Y, Miyao H, Ono T, Iwanaga T, Omori K, Okano M, Suzuki M, Momota H, Hishigaki H, Hayashi I, Goto Y, Shinomiya H, Harada Y, Hirashima T, Kanemoto N, Asai T, Wakitani S, Takagi T, Nakamura Y, Tanigami A, Watanabe TK. Substitution of Dmo1 with normal alleles results in decreased manifestation of diabetes in OLETF rats. Diabetes Obes Metab 2002; 4:309-18. [PMID: 12190994 DOI: 10.1046/j.1463-1326.2002.00217.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [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: 11/20/2022]
Abstract
AIM Dmo1 (Diabetes Mellitus OLETF type I) is a major quantitative trait locus for dyslipidaemia, obesity and diabetes phenotypes in the Otsuka Long Evans Tokushima Fatty (OLETF) rat strain. To evaluate possible metabolic and pathological improvements generated by correction of the Dmo1 genetic pathway, we produced congenic lines, in which both OLETF Dmo1 alleles are replaced by the F344-derived genome. METHODS Congenic animals were produced by introgressing F344-derived Dmo1 alleles into the OLETF rat. Congenic animals of the fourth generation (BC4) were intercrossed to obtain F1 animals (BC4:F1). Animals of the next generation, BC4:F2, were used for this study. We used 23 BC4:F2 males harbouring homozygous replacement of the OLETF Dmo1 region with the F344-derived genome. Seven animals with OLETF-derived Dmo1 alleles were used as controls. RESULTS Dmo1-F344/F344 congenic rats showed significant decreases in body weight, abdominal fat weight, serum triacylglycerols, total cholesterol, food consumption and blood glucose after glucose loading (13%, 39%, 45%, 27%, 18% and 27% respectively; p < 0.05) compared with Dmo1-OLETF/OLETF animals. Furthermore, histopathological analysis of the kidney showed that mesangial sclerosis, hyalin deposits and deposition of PAS-positive substance were significantly lower in Dmo1-F344/F344 animals (p < 0.05). CONCLUSION Improvements in metabolic parameters and histopathological scores show that correction of the Dmo1 genetic pathway in the diabetic and mildly obese OLETF rat strain produces wide-ranging therapeutic effects. Thus, this pathway might represent a new drug target also applicable to humans.
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Affiliation(s)
- S Okuno
- Otsuka GEN Research Institute, Otsuka Pharmaceutical Co. Ltd, Kawauchi-cho, Tokushima, Japan
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42
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Otsuka K, Cornélissen G, Weydahl A, Holmeslet B, Hansen TL, Shinagawa M, Kubo Y, Nishimura Y, Omori K, Yano S, Halberg F. Geomagnetic disturbance associated with decrease in heart rate variability in a subarctic area. Biomed Pharmacother 2002; 55 Suppl 1:51s-56s. [PMID: 11774868 DOI: 10.1016/s0753-3322(01)90005-8] [Citation(s) in RCA: 29] [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] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND Physical environmental variables, such as the natural variation in the geomagnetic field in and around the earth, influence biological processes and human health. The effect of geomagnetic disturbances on heart rate variability (HRV) in healthy students in a subarctic area is studied herein. SUBJECTS AND METHODS Seven-day records by Holter ECG were obtained from eight clinically healthy subjects in Alta, Norway (70 N). Frequency- and time-domain measures of HRV were compared between 24-hour spans of high geomagnetic disturbance versus quiet conditions. RESULTS A 5.9% increase in the 24-hour average of HR (P = 0.020) and a 25.2% decrease in HRV (P = 0.002) were documented on days of high geomagnetic disturbance. The decrease in spectral power was found primarily at frequencies lower than 0.04 Hz and was not statistically significant around 3.6 sec. CONCLUSIONS The physiological mechanism involved may be other than the parasympathetic, usually identified with spectral power centered around 3.6 sec, a spectral region wherein no statistically significant differences were found.
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Affiliation(s)
- K Otsuka
- Department of Medicine, Tokyo Women's Medical University, Daini Hospital, Nishiogu, Japan.
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43
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Nakata A, Ogawa K, Sasaki T, Koyama N, Wada K, Kotera J, Kikkawa H, Omori K, Kaminuma O. Potential role of phosphodiesterase 7 in human T cell function: comparative effects of two phosphodiesterase inhibitors. Clin Exp Immunol 2002; 128:460-6. [PMID: 12067300 PMCID: PMC1906253 DOI: 10.1046/j.1365-2249.2002.01856.x] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.7] [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] [Indexed: 11/20/2022] Open
Abstract
Even though the existence of phosphodiesterase (PDE) 7 in T cells has been proved, the lack of a selective PDE7 inhibitor has confounded an accurate assessment of PDE7 function in such cells. In order to elucidate the role of PDE7 in human T cell function, the effects of two PDE inhibitors on PDE7A activity, cytokine synthesis, proliferation and CD25 expression of human peripheral blood mononuclear cells (PBMC) were determined. Recombinant human PDE7A was obtained and subjected to cyclic AMP-hydrolysis assay. PBMC of Dermatophagoides farinae mite extract (Df)-sensitive donors were stimulated with the relevant antigen or an anti-CD3 monoclonal antibody (MoAb). PBMC produced IL-5 and proliferated in response to stimulation with Df, while stimulation with anti-CD3 MoAb induced CD25 expression and messenger RNA (mRNA) synthesis of IL-2, IL-4 and IL-5 in peripheral T cells. A PDE inhibitor, T-2585, which suppressed PDE4 isoenzyme with high potency (IC50 = 0.00013 microM) and PDE7A with low potency (IC50 = 1.7 microM) inhibited cytokine synthesis, proliferation and CD25 expression in the dose range at which the drug suppressed PDE7A activity. A potent selective inhibitor of PDE4 (IC50 = 0.00031 microM), RP 73401, which did not effectively suppress PDE7A (IC50 > 10 microM), inhibited the Df- and anti-CD3 MoAb-stimulated responses only weakly, even at 10 microM. PDE7 may play a critical role in the regulation of human T cell function, and thereby selective PDE7 inhibitors have the potential to be used to treat immunological and inflammatory disorders.
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MESH Headings
- 3',5'-Cyclic-AMP Phosphodiesterases/antagonists & inhibitors
- 3',5'-Cyclic-AMP Phosphodiesterases/genetics
- 3',5'-Cyclic-AMP Phosphodiesterases/immunology
- Animals
- Antigens, Dermatophagoides
- Benzamides/pharmacology
- COS Cells
- Cell Division
- Cells, Cultured
- Chlorocebus aethiops
- Cyclic Nucleotide Phosphodiesterases, Type 7
- Cysteine Endopeptidases/immunology
- Gene Expression/drug effects
- Glycoproteins/immunology
- Humans
- Interleukin-2/genetics
- Interleukin-4/genetics
- Interleukin-5/biosynthesis
- Interleukin-5/genetics
- Isoenzymes/antagonists & inhibitors
- Isoenzymes/genetics
- Isoenzymes/immunology
- Leukocytes, Mononuclear/cytology
- Leukocytes, Mononuclear/drug effects
- Leukocytes, Mononuclear/immunology
- Phosphodiesterase Inhibitors/pharmacology
- Phthalazines/pharmacology
- Pyridines/pharmacology
- RNA, Messenger
- Receptors, Interleukin-2/biosynthesis
- T-Lymphocytes/drug effects
- T-Lymphocytes/immunology
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Affiliation(s)
- A Nakata
- Discovery Research Laboratory, Tanabe Seiyaku Co. Ltd, Saitama, Japan.
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44
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Omori K, Fujiseki Y, Omori K, Suzukawa J, Inagaki C. Regulation of the expression of lysyl oxidase mRNA in cultured rabbit retinal pigment epithelium cells. Matrix Biol 2002; 21:337-48. [PMID: 12128071 DOI: 10.1016/s0945-053x(02)00013-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [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: 11/19/2022]
Abstract
Lysyl oxidase, an extracellular amine oxidase, controls the maturation of collagen and elastin. We examined the regulation of lysyl oxidase mRNA in cultured rabbit retinal pigment epithelium (RPE) cells in relation to the changes in subretinal fluid transport and phenotype of RPE cells. The level of the mRNA in cells grown on microporous membranes was markedly increased by application of hyperosmotic mannitol solution on the apical side (191% of control), implying that RPE cells express more lysyl oxidase in the condition which may cause the accumulation of subretinal fluid. Platelet-derived growth factor increased the mRNA level in subconfluent cells in culture (137% of control) and basic fibroblast growth factor decreased it (79% of control). In addition, exposure of cells to retinoic acid alone or in combination with dibutyryl cAMP for 22 days markedly decreased the level of lysyl oxidase mRNA (52 or 35% of control) while increasing the level of mRNA of N-acetylglucosaminidase (NAG), a marker enzyme for lysosomes (162 or 142% of control). Moreover, the level of lysyl oxidase mRNA in cells grown on microporous membranes was lower than that in cells grown on plastic dishes, while the level of NAG mRNA in the former cells was higher than that in the latter. Taken together, the expression of lysyl oxidase seemed to increase during proliferation of RPE cells and decrease toward differentiation. beta-Aminopropionitrile, an inhibitor of lysyl oxidase, significantly inhibited the contraction of collagen gels by fetal calf serum, suggesting that lysyl oxidase may be involved in pathogenesis caused by RPE cells.
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Affiliation(s)
- Kyoko Omori
- Department of Pharmacology, Kansai Medical University, 10-15 Fumizono-cho, Moriguchi, 570-8506, Osaka, Japan.
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45
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Idei A, Matsumae H, Kawai E, Yoshioka R, Shibatani T, Akatsuka H, Omori K. Utilization of ATP-binding cassette exporter for hyperproduction of an exoprotein: construction of lipase-hyperproducing recombinant strains of Serratia marcescens. Appl Microbiol Biotechnol 2002; 58:322-9. [PMID: 11935183 DOI: 10.1007/s00253-001-0896-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [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: 09/20/2001] [Revised: 10/18/2001] [Accepted: 11/02/2001] [Indexed: 11/26/2022]
Abstract
The Serratia marcescens extracellular lipase (LipA) is an enzyme applicable to enantioselective hydrolysis of racemic substrates. The enzyme is secreted through an ATP-binding cassette (ABC) exporter, the Lip system, encoded by the lipBCD genes. The S. marcescens recombinant carrying pLIPE121, which encodes the lipA gene in pUC19, exhibited a higher LipA production level than the wild-type strain. However, the level was lower than expected, and secretion was suggested to be a bottleneck. lipBCD plasmids were introduced into S. marcescens recombinants harboring lipA plasmids and the effectiveness of the lipBCD plasmids in elevating LipA productivity was investigated. S. marcescens strains harboring both lipA and lipBCD plasmids showed sevenfold greater extracellular LipA activity than the strain harboring the lipA plasmid alone. A high level of extracellular LipA production (1,300 kU/ml) and high plasmid stability (enough to carry out large-scale cultivation) were observed under non-selective conditions. Addition of L-proline and Tween 80 was effective in increasing cell growth of the recombinant, which led to high LipA production. In batch cultivation using a 30-l jar fermentor, LipA production was achieved at a high level of 5,200 kU/ml. This is the first report describing utilization of ABC exporter for the overproduction of an industrially important extracellular protein.
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Affiliation(s)
- A Idei
- Discovery Research Laboratory, Tanabe Seiyaku, Osaka, Japan
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46
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Narita I, Goto S, Saito N, Sakatsume M, Jin S, Omori K, Gejyo F. Genetic polymorphisms in the promoter and 5' UTR region of the Fc alpha receptor (CD89) are not associated with a risk of IgA nephropathy. J Hum Genet 2002; 46:694-8. [PMID: 11776381 DOI: 10.1007/s100380170002] [Citation(s) in RCA: 13] [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] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The molecular mechanisms of immunoglobulin A glomerulonephritis (IgAN), the most prevalent form of primary glomerulonephritis, remain poorly understood. Recently, the essential role of soluble Fc alpha receptor (FcalphaR) in the formation of the pathogenic immune complex has been revealed. We screened genomic DNA samples from patients with IgAN and those with other glomerular diseases for polymorphisms in the promoter and the 5'-untranslated region region of the FcalphaR gene by direct nucleotide sequencing. We found three common polymorphisms in this region, T-114C, T-27C, and T+56C from the putative transcription initiation site. Each genotype was determined in 151 patients with IgAN and 163 patients with other glomerular diseases shown to have no mesangial IgA deposition by renal biopsy. The haplotype analysis revealed tight linkage disequilibrium among them. An association study for the genotype, allele, and haplotype frequencies of the polymorphisms between the patients with histologically proven IgAN and those with other glomerular diseases showed no significant difference in the genotype, allele, and haplotype distributions between the two groups. The present study indicates that the analyzed polymorphisms of the FcalphaR gene do not appear to be primarily involved in the susceptibility to IgAN.
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Affiliation(s)
- I Narita
- Division of Clinical Nephrology and Rheumatology, Niigata University Graduate School of Medical and Dental Sciences, Japan.
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47
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Omori N, Nomura K, Omori K, Takano K, Obara T. Rational, effective metyrapone treatment of ACTH-independent bilateral macronodular adrenocortical hyperplasia (AIMAH). Endocr J 2001; 48:665-9. [PMID: 11873864 DOI: 10.1507/endocrj.48.665] [Citation(s) in RCA: 21] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Standard therapy for ACTH-independent bilateral macronodular adrenocortical hyperplasia (AIMAH), a rare form of Cushing's syndrome, is bilateral adrenalectomy. Patients with AIMAH are usually elderly, with a variety of complications, and at risk for surgery. Postoperatively, they must receive lifelong corticosteroids and spend the remainder of their lives avoiding adrenal crisis. Therapy using metyrapone, a potent inhibitor of steroidogenesis, provides the advantages of avoiding the surgery. Its effectiveness is further anticipated because adrenal steroidogenic enzymes are reportedly weak in AIMAH. Treatment with metyrapone thus appears a good therapy for AIMAH, but its effectiveness has not, to our knowledge, been studied. We treated a 59-year-old man with AIMAH with metyrapone. At a low dose of metyrapone (500 to 750 mg/day), his plasma cortisol levels decreased to the normal range, and hypertension and diabetes mellitus were ameliorated. Therapy using metyrapone thus appears effective in treating AIMAH, and can be recommended for high risk AIMAH patients as an alternative therapy.
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Affiliation(s)
- N Omori
- Department of Medicine, Institute of Clinical Endocrinology, Tokyo Women's Medical University, School of Medicine, Japan
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48
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Kitagawa K, Yagyu K, Yamamoto A, Hattori N, Omori K, Zeng XT, Inagaki C. Molecular cloning and characterization of the Cl(-) pump-associated 55-kDa protein in rat brain. Biochem Biophys Res Commun 2001; 289:363-71. [PMID: 11716481 DOI: 10.1006/bbrc.2001.5997] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [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: 11/22/2022]
Abstract
The Cl(-)-ATPase/pump in the plasma membrane of the rat brain is a candidate for active outwardly directed Cl(-) translocating systems. We recently isolated a Cl(-) pump, 520- or 580-kDa protein complex, which consisted of 51-, 55-, 60-, and 62-kDa proteins. In this study, we cloned a cDNA encoding a 55-kDa glycoprotein, designated as ClP55, which contained an open reading frame of 1512 base pairs encoding a protein of 504 amino acids including a signal peptide of 28 amino acids. Northern and Western blot analyses demonstrated expression of ClP55 mainly in the cerebrum. Application of antisense phosphorothioate oligonucleotides to cultured neurons resulted in a marked increase in the intracellular Cl(-) concentration ([Cl(-)](i)). Immunohistochemical analysis indicated that ClP55 was localized to the plasma membranes of neurons such as hippocampal pyramidal neurons and cerebellar Purkinje cells. Taken together, these results suggest that ClP55 is one of the Cl(-) pump subunits responsible for Cl(-) pump activity.
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MESH Headings
- Adenosine Triphosphatases/chemistry
- Adenosine Triphosphatases/genetics
- Adenosine Triphosphatases/metabolism
- Amino Acid Sequence
- Animals
- Anion Transport Proteins
- Base Sequence
- Blotting, Northern
- Blotting, Western
- Brain/enzymology
- Cell Membrane/enzymology
- Cell Membrane/metabolism
- Cells, Cultured
- Cerebellum/metabolism
- Chlorine/metabolism
- Cloning, Molecular
- DNA, Complementary/metabolism
- Electrophoresis, Polyacrylamide Gel
- Glutathione Transferase/metabolism
- Hippocampus/embryology
- Hippocampus/enzymology
- Immunohistochemistry
- Microscopy, Fluorescence
- Molecular Sequence Data
- Neurons/enzymology
- Neurons/metabolism
- Oligonucleotides, Antisense/chemistry
- Open Reading Frames
- Protein Processing, Post-Translational
- Rats
- Rats, Wistar
- Recombinant Fusion Proteins/metabolism
- Signal Transduction
- Telencephalon/enzymology
- Tissue Distribution
- Transfection
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Affiliation(s)
- K Kitagawa
- Department of Pharmacology, Kansai Medical University, Moriguchi, Osaka 570-8506, Japan.
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49
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Zhang L, Yang KH, Dwarampudi R, Omori K, Li T, Chang K, Hardy WN, Khalil TB, King AI. Recent advances in brain injury research: a new human head model development and validation. Stapp Car Crash J 2001; 45:369-94. [PMID: 17458754 DOI: 10.4271/2001-22-0017] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Many finite element models have been developed by several research groups in order to achieve a better understanding of brain injury. Due to the lack of experimental data, validation of these models has generally been limited. Consequently, applying these models to investigate brain responses has also been limited. Over the last several years, several versions of the Wayne State University brain injury model (WSUBIM) were developed. However, none of these models is capable of simulating indirect impacts with an angular acceleration higher than 8,000 rad/s(2). Additionally, the density and quality of the mesh in the regions of interest are not detailed and sensitive enough to accurately predict the stress/strain level associated with a wide range of impact severities. In this study, WSUBIM version 2001, capable of simulating direct and indirect impacts with a combined translational and rotational acceleration of the head up to 200 g and 12,000 rad/s(2) has been developed. This new finely meshed model, consisting of more than 314,500 elements and 281,800 nodes, also simulates an anatomically detailed facial bone model. An additional new feature of the model is the damageable material property representation of the facial bone and the skull, allowing it to simulate bony fractures. The model was subjected to extensive validation using published cadaveric test data. These data include the intracranial and ventricular pressure data reported by Nahum et al. (1977) and Trosseille et al. (1992), the relative displacement data between the brain and the skull reported by King et al. (1999) and Hardy et al. (2001), and the facial impact data reported by Nyquist et al. (1986) and Allsop et al. (1988). With the enhanced accuracy of model predictions offered by this new model, along with new experimental data, it is hoped that it will become a powerful tool to further our understanding of the mechanisms of injury and the tolerance of the brain to blunt impact.
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Omori K. [Extracellular protein secretion signal of gram-negative bacterial ABC-exporter]. Seikagaku 2001; 73:1329-33. [PMID: 11831029] [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)
- K Omori
- Discovery Research Laboratory, Tanabe Seiyaku Co., Ltd., 2-50 Kawagishi-2-chome, Toda, Saitama 335-8505
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