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Toya Y, Ishikawa K, Yoshida T, Matsumoto A, Akasaka M, Nozu K. Usefulness of Early Genetic Diagnosis for Twins With a Family History of Congenital Nephrotic Syndrome. Cureus 2023; 15:e36667. [PMID: 37101999 PMCID: PMC10124580 DOI: 10.7759/cureus.36667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/25/2023] [Indexed: 03/29/2023] Open
Abstract
We reported a dichorionic diamniotic placental twin (DD twin) with a family history of a congenital nephrotic syndrome of the Finnish type (CNF), of which the parent had heterozygous for the NPHS1 gene mutation. The DD twin was born at 36 weeks gestation, and their fused placenta weighed 1,340 g. Although the first-born child had heavy proteinuria and hypoalbuminemia and needed daily albumin replacement to manage severe edema, the second had only mild proteinuria after birth. Genetic testing performed 28 days after birth detected homozygous for the NPHS1 gene mutation in only the first-born child but not in the second, which resulted in performing invasive left nephrectomy and peritoneal dialysis (PD) to manage edema in the first. For DD twins with a family history of CNF, prenatal diagnosis of CNF may be difficult. Therefore, close postnatal clinical observation and early genetic testing are essential for the diagnosis of CNF.
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2
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Kobayashi M, Suzuki M, Toya Y, Matsumoto A, Sasaki A. Oral synechia with complete obstruction of the oral cavity and laryngopharynx. Pediatr Int 2023; 65:e15555. [PMID: 37310122 DOI: 10.1111/ped.15555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 04/19/2023] [Accepted: 04/27/2023] [Indexed: 06/14/2023]
Affiliation(s)
- Megumi Kobayashi
- Department of Surgery, Iwate Medical University School of Medicine, Iwate, Japan
| | - Makoto Suzuki
- Department of Surgery, Iwate Medical University School of Medicine, Iwate, Japan
| | - Yukiko Toya
- Department of Pediatrics, Iwate Medical University School of Medicine, Iwate, Japan
| | - Atsushi Matsumoto
- Department of Pediatrics, Iwate Medical University School of Medicine, Iwate, Japan
| | - Akira Sasaki
- Department of Surgery, Iwate Medical University School of Medicine, Iwate, Japan
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Muacevic A, Adler JR, Matsumoto A, Toya Y, Takashimizu N, Tsuchiya S. Predictive Ability of Combined Factor Scores for Chromosomal Abnormalities in Pregnant Women With Polyhydramnios. Cureus 2022; 14:e33106. [PMID: 36721614 PMCID: PMC9884180 DOI: 10.7759/cureus.33106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/29/2022] [Indexed: 12/31/2022] Open
Abstract
AIM This study investigated factors that can predict chromosomal abnormalities in pregnant women with polyhydramnios. The ability of prenatal factors to predict chromosomal abnormalities was evaluated using receiver operator characteristic curves. METHODS Of 76 eligible pregnant women, major anomalies were detected in 41 (54%) and chromosomal abnormalities in 19 (25%): trisomy 13 in one, trisomy 18 in 10, trisomy 21 in seven, and 22q11.2 deletion syndrome in one. Combined factor scores, including maternal age, major anomaly, abdominal circumference percentile, femur length percentile, and estimated fetal weight percentile, proved to be good predictors (area under the curve, 0.81-0.87) of chromosomal abnormalities and showed a sensitivity of 79% and specificity of 75%. CONCLUSION Combined scores demonstrated more accuracy than individual factors for predicting chromosomal abnormalities. Even if an anomaly is not detected on fetal ultrasonography, in cases with higher scores, chromosomal abnormalities should be suspected, and delivery at a level III facility may be recommended.
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Saito K, Saiki H, Tsuchiya S, Takizawa Y, Sato A, Goto T, Toya Y, Matsumoto A, Koizumi J, Oyama K, Akasaka M. Effect of Minocycline Pleurodesis in Infants With Refractory Chylothorax After Palliative Surgery for Complex Congenital Heart Disease. Cureus 2022; 14:e23506. [PMID: 35494945 PMCID: PMC9045464 DOI: 10.7759/cureus.23506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/26/2022] [Indexed: 12/02/2022] Open
Abstract
Chylothorax is a critical complication after surgery for congenital heart disease, which markedly compromises the postoperative course with increased mortality. As the cardiovascular load additively causes stagnation of the thoracic duct, chylothorax after palliative cardiac surgery can be highly refractory to the therapies. Here we report a case of two patients with refractory chylothorax attributed to hemodynamic load which was successfully treated with minocycline pleurodesis. In combination with congenital heart disease, extremely low birth weight coupled with prematurity in case 1 and venous obstruction with excessive volume load due to additional aortopulmonary shunt in case 2 additively increased resistance to the therapies, including fasting with total parenteral nutrition (TPN), XIII factor supplementation, octreotide infusion, as well as the use of steroids. As pleural effusion was sustained at more than 50 ml/kg/day, the condition of both patients deteriorated severely; pleurodesis using minocycline was urgently introduced. Pleural effusion declined at every session and both cases were in remission in a few sessions without unfavorable acute reaction. No symptoms suspecting chronic adverse effects were observed during follow-up, including respiratory dysfunction, pulmonary hypertension, tooth staining, or abnormal bone mineralization. Although the application of minocycline for children should be minimized, minocycline pleurodesis can be an option for patients with refractory and life-threatening chylothorax.
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Hirai M, Toya Y, Kikuchi A, Yanai S, Tabayashi A, Matsumoto T. Rare cause of lower gastrointestinal bleeding: Iliac aneurysmo-colonic fistula after endovascular treatment. J Gastroenterol Hepatol 2022; 37:417. [PMID: 34414602 DOI: 10.1111/jgh.15651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 07/29/2021] [Accepted: 08/04/2021] [Indexed: 12/09/2022]
Affiliation(s)
- M Hirai
- Division of Gastroenterology, Department of Internal Medicine, School of Medicine, Iwate Medical University, Yahaba, Japan
| | - Y Toya
- Division of Gastroenterology, Department of Internal Medicine, School of Medicine, Iwate Medical University, Yahaba, Japan
| | - A Kikuchi
- Division of Gastroenterology, Department of Internal Medicine, School of Medicine, Iwate Medical University, Yahaba, Japan
| | - S Yanai
- Division of Gastroenterology, Department of Internal Medicine, School of Medicine, Iwate Medical University, Yahaba, Japan
| | - A Tabayashi
- Department of Cardiovascular Surgery, School of Medicine, Iwate Medical University, Yahaba, Japan
| | - T Matsumoto
- Division of Gastroenterology, Department of Internal Medicine, School of Medicine, Iwate Medical University, Yahaba, Japan
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Toya Y, Yamada S, Yanai S, Miyajima S, Matsumoto T. Gastrointestinal: Endoscopic removal of a migrating esophageal metallic stent. J Gastroenterol Hepatol 2021; 36:1151. [PMID: 33241866 DOI: 10.1111/jgh.15334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 09/03/2020] [Accepted: 11/03/2020] [Indexed: 12/13/2022]
Affiliation(s)
- Y Toya
- Division of Gastroenterology, Department of Internal Medicine, School of Medicine, Iwate Medical University, Yahaba, Japan
| | - S Yamada
- Division of Gastroenterology, Department of Internal Medicine, School of Medicine, Iwate Medical University, Yahaba, Japan
| | - S Yanai
- Division of Gastroenterology, Department of Internal Medicine, School of Medicine, Iwate Medical University, Yahaba, Japan
| | - S Miyajima
- Division of Hematology and Oncology, Department of Internal Medicine, School of Medicine, Iwate Medical University, Yahaba, Japan
| | - T Matsumoto
- Division of Gastroenterology, Department of Internal Medicine, School of Medicine, Iwate Medical University, Yahaba, Japan
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Sotodate G, Oyama K, Saiki H, Matsumoto A, Konishi Y, Toya Y, Takashimizu N, Tsuchiya S. Comparing risk factors associated with the late detection of critical congenital heart disease at different facility levels. J Obstet Gynaecol Res 2020; 47:961-967. [PMID: 33350039 DOI: 10.1111/jog.14623] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 07/21/2020] [Revised: 11/25/2020] [Accepted: 12/10/2020] [Indexed: 11/30/2022]
Abstract
AIMS Critical congenital heart disease (CCHD) requires surgery or catheter intervention within the first year of life; delayed diagnoses result in worsened outcomes. In Japan, there are few reports of delayed CCHD diagnosis. We investigated the diagnoses and factors associated with the late detection of CCHD. METHODS This retrospective cohort study evaluated 88 CCHD infants admitted to a level IV facility. We compared the late detection rates across facility levels of neonatal care and CCHD characteristics. RESULTS Critical congenital heart disease was identified prenatally in 46 (52%) infants: early (≤3 days postnatally) in 29 (33%) and late (≥4 days postnatally) in 13 (15%). The oxygen saturation of 27 of 29 infants with early detection and 7 of 13 infants with late detection was measured using pulse oximetry within 3 days postnatally. Factors associated with the late detection of CCHD were lack of clinical recognition of symptoms in five infants, referral to higher-level facilities after discharge in four infants, and definitive diagnosis not confirmed using echocardiography in four infants. The most common factors associated with late detection were referral to higher-level facilities after discharge in level I facilities and definitive diagnosis not confirmed using echocardiography in level II facilities. CONCLUSION Critical congenital heart disease may require advanced knowledge and echocardiographic techniques for diagnosis. Pulse oximetry and telemedicine should also be incorporated in the diagnostic algorithm. Improvement in these factors might contribute to reducing the late detection of CCHD.
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Affiliation(s)
| | - Kotaro Oyama
- Department of Pediatrics, Iwate Medical University, Morioka, Japan
| | - Hirofumi Saiki
- Department of Pediatrics, Iwate Medical University, Morioka, Japan
| | | | - Yu Konishi
- Department of Pediatrics, Iwate Medical University, Morioka, Japan
| | - Yukiko Toya
- Department of Pediatrics, Iwate Medical University, Morioka, Japan
| | - Nao Takashimizu
- Department of Pediatrics, Iwate Medical University, Morioka, Japan
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Sotodate G, Oyama K, Matsumoto A, Konishi Y, Toya Y, Takashimizu N. Predictive ability of neonatal illness severity scores for early death in extremely premature infants. J Matern Fetal Neonatal Med 2020; 35:846-851. [PMID: 32098532 DOI: 10.1080/14767058.2020.1731794] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Background: The predictive ability of neonatal illness severity scores for mortality or morbidity in extremely premature infants has not been extensively studied. We aimed to evaluate the ability of neonatal illness severity scores [Clinical Risk Index for Babies II (CRIB II), Score for Neonatal Acute Physiology II (SNAP-II), and SNAP-Perinatal Extension II (SNAPPE-II)] in predicting mortality and short-term morbidity of extremely premature infants.Methods: This retrospective study involved 171 infants with gestational age (GA) between 22 and 27 weeks who were admitted to the NICU during 2010-2017. Predictive ability of neonatal illness severity scores for mortality and short-term morbidity (bronchopulmonary dysplasia, retinopathy of prematurity, intraventricular hemorrhage, necrotizing enterocolitis, and gastrointestinal perforation) was assessed by comparing their area under the receiver operating characteristic curve.Results: The overall mortality rate was 11.1%. Mortality at 23 weeks' gestation was higher than that at 24-27 weeks' gestation (p < .01, adjusted residual 4.5). Neonatal illness severity scores were significantly higher in infants who died than in those who survived (p < .01). CRIB II (AUC 0.93, 95% CI 0.85-1.00), SNAP-II (AUC 0.90, 95% CI 0.76-1.00), and SNAPPE-II (AUC 0.95, 95% CI 0.91-0.99) appeared to be excellent predictors and were superior to birth weight (AUC 0.88, 95% CI 0.80-0.95) or GA (AUC 0.84, 95% CI 0.72-0.96) alone in predicting early death (died on <28th postnatal day). CRIB II, SNAP-II, and SNAPPE-II were better predictors of early death than mortality in extremely premature infants. Neonatal illness severity score and short-term morbidity were not strongly associated.Conclusions: The neonatal illness severity scores were excellent predictors of early death in extremely premature infants and might be useful for selecting extremely preterm infants who need intervention.
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Affiliation(s)
- Genichiro Sotodate
- Department of Pediatrics, School of Medicine, Iwate Medical University, Iwate, Japan
| | - Kotaro Oyama
- Department of Pediatrics, School of Medicine, Iwate Medical University, Iwate, Japan
| | - Atsushi Matsumoto
- Department of Pediatrics, School of Medicine, Iwate Medical University, Iwate, Japan
| | - Yu Konishi
- Department of Pediatrics, School of Medicine, Iwate Medical University, Iwate, Japan
| | - Yukiko Toya
- Department of Pediatrics, School of Medicine, Iwate Medical University, Iwate, Japan
| | - Nao Takashimizu
- Department of Pediatrics, School of Medicine, Iwate Medical University, Iwate, Japan
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9
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Kumei T, Toya Y, Shiohata T, Kakuta F, Yanai S, Kawasaki K, Nakamura S, Matsumoto T. Gastrointestinal: Endoscopic injection sclerotherapy for duodenal vascular malformation in blue rubber bleb nevus syndrome. J Gastroenterol Hepatol 2019; 34:963. [PMID: 30638279 DOI: 10.1111/jgh.14590] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Accepted: 12/28/2018] [Indexed: 12/09/2022]
Affiliation(s)
- T Kumei
- Division of Gastroenterology, Department of Internal Medicine, School of Medicine, Iwate Medical University, Morioka, Japan
| | - Y Toya
- Division of Gastroenterology, Department of Internal Medicine, School of Medicine, Iwate Medical University, Morioka, Japan
| | - T Shiohata
- Department of Pediatrics, School of Medicine, Iwate Medical University, Morioka, Japan
| | - F Kakuta
- Department of General Pediatrics, Miyagi Children's Hospital, Sendai, Japan
| | - S Yanai
- Division of Gastroenterology, Department of Internal Medicine, School of Medicine, Iwate Medical University, Morioka, Japan
| | - K Kawasaki
- Division of Gastroenterology, Department of Internal Medicine, School of Medicine, Iwate Medical University, Morioka, Japan
| | - S Nakamura
- Division of Gastroenterology, Department of Internal Medicine, School of Medicine, Iwate Medical University, Morioka, Japan
| | - T Matsumoto
- Division of Gastroenterology, Department of Internal Medicine, School of Medicine, Iwate Medical University, Morioka, Japan
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10
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Nishimi S, Sugawara H, Onodera C, Toya Y, Furukawa H, Konishi Y, Sotodate G, Matsumoto A, Ishikawa K, Oyama K. Complications During Continuous Renal Replacement Therapy in Critically Ill Neonates. Blood Purif 2019; 47 Suppl 2:74-80. [PMID: 30943473 DOI: 10.1159/000496654] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Background/ Aims: Owing to practical and technical developments, continuous renal replacement therapy (CRRT) has been administered even in critically ill neonates. In this study, the complications in CRRT for neonates were examined to establish a safe CRRT. METHODS This retrospective study reviewed the clinical records of neonates who underwent CRRT at our neonatal intensive care unit between 2009 and 2017. RESULTS Eight neonates with a body weight of 1,462-3,288 g were treated by 70 CRRT sessions with blood priming. Intradialytic hypotension (IDH) was observed in 39 sessions (55.7%), most of which occurred soon after the start of the CRRT. Body temperature decreased in 48 sessions (70.5%), and thrombocytopenia during CRRT occurred 30 times (42.9%). CONCLUSION Complications during CRRT in neonates comprised IDH at the start of the CRRT, body temperature decline, and thrombocytopenia. These complications need to be analyzed for a safe neonatal CRRT.
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Affiliation(s)
- Saeko Nishimi
- Department of Pediatrics, School of Medicine, Iwate Medical University, Morioka, Japan
| | - Hiroshi Sugawara
- Department of Pediatrics, School of Medicine, Iwate Medical University, Morioka, Japan
| | - Chinatsu Onodera
- Department of Pediatrics, School of Medicine, Iwate Medical University, Morioka, Japan
| | - Yukiko Toya
- Department of Pediatrics, School of Medicine, Iwate Medical University, Morioka, Japan
| | - Hiromi Furukawa
- Department of Pediatrics, School of Medicine, Iwate Medical University, Morioka, Japan
| | - Yu Konishi
- Department of Pediatrics, School of Medicine, Iwate Medical University, Morioka, Japan
| | - Genichiro Sotodate
- Department of Pediatrics, School of Medicine, Iwate Medical University, Morioka, Japan
| | - Atsushi Matsumoto
- Department of Pediatrics, School of Medicine, Iwate Medical University, Morioka, Japan
| | - Ken Ishikawa
- Department of Pediatrics, School of Medicine, Iwate Medical University, Morioka, Japan,
| | - Kotaro Oyama
- Department of Pediatrics, School of Medicine, Iwate Medical University, Morioka, Japan
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11
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Gonai T, Toya Y, Nakamura S, Kawasaki K, Yanai S, Fujita Y, Uesugi N, Kimura T, Otsuka K, Sugai T, Matsumoto T. Gastrointestinal: Idiopathic myointimal hyperplasia of mesenteric veins. J Gastroenterol Hepatol 2018; 33:1939. [PMID: 30084114 DOI: 10.1111/jgh.14384] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Accepted: 07/09/2018] [Indexed: 12/09/2022]
Affiliation(s)
- T Gonai
- Division of Gastroenterology, Department of Internal Medicine, School of Medicine, Iwate Medical University, Morioka, Japan
| | - Y Toya
- Division of Gastroenterology, Department of Internal Medicine, School of Medicine, Iwate Medical University, Morioka, Japan
| | - S Nakamura
- Division of Gastroenterology, Department of Internal Medicine, School of Medicine, Iwate Medical University, Morioka, Japan
| | - K Kawasaki
- Division of Gastroenterology, Department of Internal Medicine, School of Medicine, Iwate Medical University, Morioka, Japan
| | - S Yanai
- Division of Gastroenterology, Department of Internal Medicine, School of Medicine, Iwate Medical University, Morioka, Japan
| | - Y Fujita
- Division of Molecular Diagnostic Pathology, Department of Pathology, School of Medicine, Iwate Medical University, Morioka, Japan
| | - N Uesugi
- Division of Molecular Diagnostic Pathology, Department of Pathology, School of Medicine, Iwate Medical University, Morioka, Japan
| | - T Kimura
- Department of Surgery, Iwate Medical University, Morioka, Japan
| | - K Otsuka
- Department of Surgery, Iwate Medical University, Morioka, Japan
| | - T Sugai
- Division of Molecular Diagnostic Pathology, Department of Pathology, School of Medicine, Iwate Medical University, Morioka, Japan
| | - T Matsumoto
- Division of Gastroenterology, Department of Internal Medicine, School of Medicine, Iwate Medical University, Morioka, Japan
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12
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Sotodate G, Matsumoto A, Konishi Y, Toya Y, Endo M, Oyama K. Fetal intracranial hemorrhage due to maternal subclinical vitamin K deficiency associated with long-term eating disorder. J Obstet Gynaecol Res 2018; 45:461-465. [PMID: 30255653 DOI: 10.1111/jog.13825] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [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: 05/24/2018] [Accepted: 09/03/2018] [Indexed: 10/28/2022]
Abstract
Vitamin K deficiency in pregnant women causes intracranial hemorrhage (ICH) in fetuses. Fetal ICH frequently causes life-threatening and persistent neurological damage. However, indicators for preventing fetal ICH are not established. Two pregnant women developed long-term eating disorders caused by psychosis. They were administered intravenous fluid and vitamin supplementation, excluding vitamin K. The intracranial low-hypoechoic area on fetal ultrasound was suggestive of fetal ICH due to vitamin K deficiency. Their neonates showed severe developmental delay. Laboratory analysis revealed a normal prothrombin time, but elevated protein induced by vitamin K absence II. Pregnant women who have eating disorders more than 3 weeks could develop fetal ICH due to maternal subclinical vitamin K deficiency. Illness duration and protein induced by vitamin K absence II of pregnant woman may be indicators for vitamin K administration to prevent fetal intracranial hemorrhage.
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Affiliation(s)
- Genichiro Sotodate
- Department of Pediatrics, Iwate Medical University School of Medicine, Morioka, Japan
| | - Atsushi Matsumoto
- Department of Pediatrics, Iwate Medical University School of Medicine, Morioka, Japan
| | - Yu Konishi
- Department of Pediatrics, Iwate Medical University School of Medicine, Morioka, Japan
| | - Yukiko Toya
- Department of Pediatrics, Iwate Medical University School of Medicine, Morioka, Japan
| | - Mikiya Endo
- Department of Pediatrics, Iwate Medical University School of Medicine, Morioka, Japan
| | - Kotaro Oyama
- Department of Pediatrics, Iwate Medical University School of Medicine, Morioka, Japan
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13
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Toya R, Murakami R, Murakami D, Saito T, Matsuyama T, Baba Y, Toya Y, Yamashita Y, Oya N. Radiotherapy for T3N0 Glottic Carcinoma without Cord Fixation: Pattern of Failure Analysis. Int J Radiat Oncol Biol Phys 2017. [DOI: 10.1016/j.ijrobp.2017.06.1506] [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: 11/16/2022]
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14
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Tanifuji S, Akasaka M, Kamei A, Araya N, Asami M, Matsumoto A, Sotodate G, Konishi Y, Shirasawa S, Toya Y, Kusano S, Chida S, Sasaki M, Matsuda T. Temporal brain metabolite changes in preterm infants with normal development. Brain Dev 2017; 39:196-202. [PMID: 27838187 DOI: 10.1016/j.braindev.2016.10.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2016] [Revised: 08/10/2016] [Accepted: 10/14/2016] [Indexed: 11/19/2022]
Abstract
OBJECTIVE Preterm infants are at high risk for developmental delay, epilepsy, and autism spectrum disorders. Some reports have described associations between these conditions and gamma-aminobutyric acid (GABA) dysfunction; however, no study has evaluated temporal changes in GABA in preterm infants. Therefore, we assessed temporal changes in brain metabolites including GABA using single-voxel 3-Tesla (T) proton magnetic resonance spectroscopy (1H-MRS) in preterm infants with normal development. METHODS We performed 3T 1H-MRS at 37-46 postmenstrual weeks (PMWs, period A) and 64-73PMWs (period B). GABA was assessed with the MEGA-PRESS method. N-acetyl aspartate (NAA), glutamate-glutamine complex (Glx), creatine (Cr), choline (Cho), and myo-inositol (Ins) were assessed with the PRESS method. Metabolite concentrations were automatically calculated using LCModel. RESULTS Data were collected from 20 preterm infants for periods A and B (medians [ranges], 30 [24-34] gestational weeks, 1281 [486-2030]g birth weight). GABA/Cr ratio decreased significantly in period B (p=0.03), but there was no significant difference in GABA/Cho ratios (p=0.58) between the two periods. In period B, NAA/Cr, Glx/Cr, NAA/Cho, and Glx/Cho ratios were significantly increased (p<0.01), whereas Cho/Cr, Ins/Cr, and Ins/Cho ratios were significantly decreased (p<0.01). There was no significant difference for GABA or Cho concentrations (p=0.52, p=0.22, respectively). NAA, Glx, and Cr concentrations were significantly increased (p<0.01), whereas Ins was significantly decreased (p<0.01). CONCLUSIONS Our results provide new information on normative values of brain metabolites in preterm infants.
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Affiliation(s)
- Sachiko Tanifuji
- Department of Pediatrics, School of Medicine, Iwate Medical University, Japan
| | - Manami Akasaka
- Department of Pediatrics, School of Medicine, Iwate Medical University, Japan.
| | - Atsushi Kamei
- Department of Pediatrics, School of Medicine, Iwate Medical University, Japan
| | - Nami Araya
- Department of Pediatrics, School of Medicine, Iwate Medical University, Japan
| | - Maya Asami
- Department of Pediatrics, School of Medicine, Iwate Medical University, Japan
| | - Atsushi Matsumoto
- Department of Pediatrics, School of Medicine, Iwate Medical University, Japan
| | - Genichiro Sotodate
- Department of Pediatrics, School of Medicine, Iwate Medical University, Japan
| | - Yu Konishi
- Department of Pediatrics, School of Medicine, Iwate Medical University, Japan
| | - Satoko Shirasawa
- Department of Pediatrics, School of Medicine, Iwate Medical University, Japan
| | - Yukiko Toya
- Department of Pediatrics, School of Medicine, Iwate Medical University, Japan
| | - Syuji Kusano
- Department of Pediatrics, School of Medicine, Iwate Medical University, Japan
| | - Shoichi Chida
- Department of Pediatrics, School of Medicine, Iwate Medical University, Japan
| | - Makoto Sasaki
- Division of Ultrahigh Field MRI, Institute for Biomedical Sciences, Iwate Medical University, Japan
| | - Tsuyoshi Matsuda
- GE Healthcare Japan Corporation, MR Applications and Workflow Asia Pacific, Japan
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15
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Kawasaki K, Yanai S, Eizuka M, Toya Y, Nakamura S, Sugai T, Matsumoto T. Gastrointestinal: Endoscopic submucosal dissection for rectal cancer with dysplasia in ulcerative colitis. J Gastroenterol Hepatol 2016; 31:1797. [PMID: 27168470 DOI: 10.1111/jgh.13443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 05/05/2016] [Indexed: 12/09/2022]
Affiliation(s)
- K Kawasaki
- Division of Gastroenterology, Department of Internal Medicine, Iwate Medical University, Morioka, Japan
| | - S Yanai
- Division of Gastroenterology, Department of Internal Medicine, Iwate Medical University, Morioka, Japan
| | - M Eizuka
- Department of Diagnostic Pathology, Iwate Medical University, Morioka, Japan
| | - Y Toya
- Division of Gastroenterology, Department of Internal Medicine, Iwate Medical University, Morioka, Japan
| | - S Nakamura
- Division of Gastroenterology, Department of Internal Medicine, Iwate Medical University, Morioka, Japan
| | - T Sugai
- Department of Diagnostic Pathology, Iwate Medical University, Morioka, Japan
| | - T Matsumoto
- Division of Gastroenterology, Department of Internal Medicine, Iwate Medical University, Morioka, Japan
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Akasaka M, Kamei A, Araya N, Matsumoto A, Konishi Y, Sotodate G, Shirasawa S, Toya Y, Kasai T, Chida S, Sasaki M. Assessing Temporal Brain Metabolite Changes in Preterm Infants Using Multivoxel Magnetic Resonance Spectroscopy. Magn Reson Med Sci 2015; 15:187-92. [PMID: 26567757 PMCID: PMC5600055 DOI: 10.2463/mrms.mp.2015-0041] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
PURPOSE To investigate temporal changes in brain metabolites during the first year of life in preterm infants using multivoxel proton magnetic resonance spectroscopy ((1)H-MRS). METHODS Seventeen infants born at 29 (25-33) gestational week (median, range) weighing 1104 (628-1836) g underwent 1.5-T multivoxel (1)H-MRS at 42 postconceptional week (PCW) and at 3, 6, 9, and 12 months after. We measured N-acetyl aspartate (NAA)/creatine (Cr), choline (Cho)/Cr, myo-inositol (Ins)/Cr, NAA/Cho, and Ins/Cho ratios in the frontal lobe (FL) and basal ganglia and thalamus (BG + Th). Linear regression analyses were performed to identify longitudinal changes in infants showing normal imaging findings and normal development. We also evaluated ratios of subjects with abnormal imaging findings and/or development using the 95% confidence intervals (CIs) of regression equations in normal subjects. RESULTS In the 13 infants with normal development, NAA/Cr and NAA/Cho ratios showed significant positive correlations with PCWs in the FL (r = 0.64 and 0.83, respectively, both P < 0.01) and BG + Th (r = 0.79 and 0.87, respectively, both P < 0.01), while Cho/Cr and Ins/Cr ratios revealed significant negative correlations with PCWs in the FL (r =-0.69 and -0.58, respectively, both P < 0.01) and BG + Th (r =-0.74 and -0.72, respectively, both P < 0.01). Ins/Cho ratios in the FL did not significantly correlate with PCWs (r =-0.19, P = 0.18), while those in the BG + Th showed significant negative correlation with PCWs (r =-0.44, P < 0.01). The metrics in the abnormal group were within the normal group 95% CIs in all periods except a few exceptions. CONCLUSIONS Longitudinal multivoxel MRS is able to detect temporal changes in major brain metabolites during the first year of life in preterm infants.
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Locatelli F, Choukroun G, Fliser D, Moecks J, Wiggenhauser A, Gupta A, Swinkels DW, Lin V, Guss C, Pratt R, Carrilho P, Martins AR, Alves M, Mateus A, Gusmao L, Parreira L, Assuncao J, Rodrigues I, Stamopoulos D, Mpakirtzi N, Afentakis N, Grapsa E, Zitt E, Sturm G, Kronenberg F, Neyer U, Knoll F, Lhotta K, Weiss G, Robinson BM, Larkina M, Bieber B, Kleophas W, Li Y, Locatelli F, McCullough K, Nolen JG, Port FK, Pisoni RL, Kalicki RM, Uehlinger DE, Ogawa C, Kanda F, Tomosugi N, Maeda T, Kuji T, Fujikawa T, Shino M, Shibata K, Kaneda T, Nishihara M, Satta H, Kawata SI, Koguchi N, Tamura K, Hirawa N, Toya Y, Umemura S, Chanliau J, Martin H, Stamatelou K, Gonzalez-Tabares L, Manamley N, Farouk M, Addison J, Donck J, Schneider A, Gutjahr-Lengsfeld L, Ritz E, Scharnagl H, Gelbrich G, Pilz S, Macdougall IC, Wanner C, Drechsler C, Kuntsevich V, Charen E, Kobena D, Sheth N, Siktel H, Levin NW, Winchester JF, Kotanko P, Kaysen G, Kuragano T, Kida A, Yahiro M, Nanami M, Nagasawa Y, Hasuike Y, Nakanishi T, Stamopoulos D, Mpakirtzi N, Dimitratou V, Griveas I, Lianos E, Grapsa E, Sasaki Y, Yamazaki S, Fujita K, Kurasawa M, Yorozu K, Shimonaka Y, Suzuki N, Yamamoto M, Zwiech R, Szczepa ska J, Bruzda-Zwiech A, Rao A, Gilg J, Caskey F, Kirkpantur A, Balci MM, Turkvatan A, Afsar B, Alkis M, Mandiroglu F, Kim YO, Yoon SA, Kim YS, Choi SJ, Min JW, Cheong MA, Hasuike Y, Kida A, Oue M, Yamamoto K, Kimura T, Fukao W, Yahiro M, Kaibe S, Nanami M, Nakanishi T, Djuric PS, Ikonomovski J, Tosic J, Jankovic A, Majster Z, Stankovic Popovic V, Dimkovic N, Aicardi Spalloni V, Del Vecchio L, Longhi S, Violo L, La Milia V, Pontoriero G, Locatelli F, Shino M, Kuji T, Fujikawa T, Toya Y, Umemura S, Macdougall I, Rumjon A, Mangahis E, Goldstein L, Ryzlewicz T, Becker F, Kilgallon W, Fukasawa M, Otake Y, Yamagishi T, Kamiyama M, Kobayashi H, Takeda M, Toida T, Sato Y, Fujimoto S. DIALYSIS ANAEMIA. Nephrol Dial Transplant 2014. [DOI: 10.1093/ndt/gfu176] [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: 11/12/2022] Open
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Mikhail A, Kaplan M, Macdougall I, Schmidt RJ, Rastogi A, Wang W, Tong S, Mayo M, Oestreicher N, Schiller B, Green JM, Verma R, Leu K, Mortensen RB, Young PR, Schatz P, Wojchowski DM, Shimonaka Y, Sasaki Y, Yorozu K, Sasaki MN, Ikuta K, Kohgo Y, Shimonaka Y, Sasaki Y, Omori YM, Yorozu K, Hiramatsu M, Momoki N, Kakio Y, Shibuto N, Takeuchi H, Fukumoto M, Maruyama K, Matsuo Y, Sasaki Y, Omori Y, Yorozu K, Shimonaka Y, Robinson BM, Larkina M, Goodkin DA, Li Y, Locatelli F, Nolen J, Kleophas W, Pisoni RL, Sibbel S, Brunelli S, Krishnan M, Horie M, Hasegawa E, Minoshima KI, Shimonaka Y, Ambrus C, Kerkovits L, Szegedi J, Benke A, Toth E, Nagy L, Borbas B, Rozinka A, Nemeth J, Varga G, Kulcsar I, Gergely L, Szakony S, Kiss I, Danielson K, Qureshi AR, Heimburger O, Stenvinkel P, Lindholm B, Hylander-Rossner B, Germanis G, Hansson M, Beshara S, Barany P, Dueymes JM, Kolko A, Couchoud C, Combe C, Covic A, Goldsmith D, Zaoui P, Gesualdo L, London G, Dellanna F, Mann J, Turner M, Muenzberg M, MacDonald K, Denhaerynck K, Abraham I, Sanchez MB, Casero RC, Ortiz RV, Carmelo IG, Munoz SC, Gomez ER, Rodriguez CS, Kuji T, Fujikawa T, Kakimoto-Shino M, Shibata K, Toya Y, Umemura S, Topuzovic N, Mihaljevic I, Rupcic V, Sterner G, Clyne N, Mann J, Dellanna F, London G, Combe C, Covic A, Gesualdo L, Goldsmith D, Zaoui P, Turner M, Muenzberg M, MacDonald K, Denhaerynck K, Abraham I, Toblli J, Di Gennaro F, Chmielewski M, Jagodzinski P, Lichodziejewska-Niemierko M, Rutkowski B, Takasawa K, Takaeda C, Ueda H, Higuchi M, Maeda T, Tomosugi N, Moghazy TF, Jakic M, Zibar L, Romei Longhena G, Beck W, Liebchen A, Teatini U, Rottembourg JB, Guerin A, Diaconita M, Dansaert A, Koike K, Fukami K, Shimamatsu K, Kawaguchi A, Okuda S. Anaemia in CKD 5D. Nephrol Dial Transplant 2013. [DOI: 10.1093/ndt/gft119] [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: 11/14/2022] Open
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McCullough KP, Lok CE, Fluck RJ, Spergel LM, Andreucci VE, Fort J, Krishnan M, Fissell RB, Kawanishi H, Saran R, Port FK, Robinson BM, Pisoni RL, Shinzato T, Shionoya Y, Fukui H, Sasaki M, Miwa M, Toma S, Lin CC, Yang WC, Simone S, Loverre A, Cariello M, Divella C, Castellano G, Gesualdo L, Grandaliano G, Pertosa G, Mattei S, Pignatelli G, Corradini M, Stefani A, Bovino A, Iannuzzella F, Vaglio A, Manari A, Pasquali S, Chan JS, Wu TC, Roy-Chaudhury P, Shih CC, Chen JW, Ponce P, Scholz C, Goncalves P, Grassmann A, Canaud B, Marcelli D, Suzuki S, Shibata K, Kuji T, Kawata S, Koguchi N, Nishihara M, Satta H, Toya Y, Umemura S, Corbett R, Demicheli N, Iori F, Grechy L, Khiroya R, Ellis D, Crane J, Hamady M, Gedroyc W, Duncan N, Vincent P, Caro C, Sarween N, Price A, Powers S, Allen C, Holland M, Gupta I, Baharani J, Parisotto MT, Schoder V, Kaufmann P, Miriunis C, Grassmann A, Marcelli D, Moura A, Madureira J, Alija P, Fernandes J, Oliveira JG, Lopez M, Felgueiras M, Amado L, Sameiro-Faria M, Miranda V, Vieira M, Santos-Silva A, Costa E, David P, Capurro F, Brustia M, De Mauri A, Ruva C, Chiarinotti D, Gravellone L, De Leo M, Turkvatan A, Kirkpantur A, Mandiroglu S, Afsar B, Seloglu B, Alkis M, Erkula S, GURBUZ HG, Serin M, CALIK Y, Mandiroglu F, Balci M, Rikker C, Juhasz E, Tornoci L, Tovarosi S, Greguschik J, Rosivall L, Ibeas J, Valeriano J, Vallespin J, Fortuno J, Rodriguez-Jornet A, Cabre C, Merino J, Vinuesa X, Bolos M, Branera J, Mateos A, Jimeno V, Grau C, Criado E, Moya C, Ramirez J, Gimenez A, Garcia M, Kirmizis D, Kougioumtzidou O, Vakianis P, Bandera A, Veniero P, Brunori G, Dimitrijevic Z, Cvetkovic T, Paunovic K, Stojanovic M, Ljubenovic S, Mitic B, Djordjevic V, Aicha Henriette S, Farideh A, Daniela B, Zafer T, Francois C, Ibeas J, Vallespin J, Fortuno J, Merino J, Vinuesa X, Branera J, Mateos A, Jimeno V, Bolos M, Rodriguez-Jornet A, Gimenez A, Garcia M, Donati G, Scrivo A, Cianciolo G, La Manna G, Panicali L, Rucci P, Marchetti A, Giampalma E, Galaverni M, Golfieri R, Stefoni S, Skornyakov I, Kiselev N, Rozhdestvenskaya A, Stolyar A, Ancarani PPA, Devoto E, Dardano GGD, Coskun yavuz Y, Selcuk NY, Guney I, Altintepe L, Gerasimovska V, Gerasimovska-Kitanovska B, Persic V, Buturovic-Ponikvar J, Arnol M, Ponikvar R, Brustia M, De Mauri A, Conti N, Chiarinotti D, De Leo M, Capurro F, David P, Scrivano J, Pettorini L, Giuliani A, Punzo G, Mene P, Pirozzi N, Balci M, Turkvatan A, Mandiroglu S, Afsar B, Mandiroglu F, Kirkpantur A, Kocyigit I, Unal A, Guney A, Mavili E, Deniz K, Sipahioglu M, Eroglu E, Tokgoz B, Oymak O, Gunal A, Boubaker K, Kaaroud H, Kheder A, Ibeas J, Vidal M, Vallespin J, Amengual MJ, Merino J, Orellana R, Sanfeliu I, Rodriguez-Jornet A, Vinuesa X, Marquina D, Xirinachs M, Sanchez E, Moya C, Ramirez J, Rey M, Gimenez A, Garcia M, Strozecki P, Flisinski M, Kapala A, Manitius J, Gerasimovska V, Gerasimovska-Kitanovska BD, Sikole A, Weber E, Adrych D, Wolyniec W, Liberek T, Rutkowski B, Afsar B, Oguchi K, Nakahara T, Okamoto M, Iwabuchi H, Asano M, Rap O, Ruiz-Valverde M, Rodriguez-Murillo JA, Mallafre-Anduig JM, Zeid MM, Deghady AA, Elshair HS, Elkholy NA, Panagoutsos S, Devetzis V, Roumeliotis A, Kantartzi K, Mourvati E, Vargemezis V, Passadakis P, Kang SH, Jung SY, Lee SH, Cho KH, Park JW, Yoon KW, Do JY. Vascular access. Nephrol Dial Transplant 2013. [DOI: 10.1093/ndt/gft118] [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: 11/13/2022] Open
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Clotet S, Soler MJ, Rebull M, Pascual J, Riera M, Kucher AG, Parastaeva MM, Beresneva ON, Ivanova GT, Zaraysky MI, Artemeva AV, Kaukov IG, Smirnov AV, Roszkowska-Chojecka M, Walkowska A, Gawrys O, Olszynski K, Kompanowska-Jezierska E, Walkowska A, Roszkowska-Chojecka M, Gawrys O, Baranowska I, Kompanowska-Jezierska EM, Roszkowska-Chojecka MM, Dobrowolski L, Badzynska B, Olszynski KH, Lipkowski AW, Sadowski J, Kobayashi Y, Hirawa N, Okuyama Y, Fujita M, Fujiwara A, Saka S, Yatsu K, Toya Y, Yasuda G, Umemura S, Oliveira-Sales EB, Maquigussa E, Semedo P, Pereira LG, Camara NOS, Bergamaschi CT, Campos RR, Boim MA, Potenza MA, Sirolli V, Addabbo F, Di Pietro N, Amoroso L, Pipino C, Pandolfi A, Montagnani M, Bonomini M, Quiroz YJ, Rivero M, Yaguas K, Moran L, Rodriguez-Iturbe B, Lee J, Heo NJ, Kim S, Joo KW, Han JS, Rapp W, Raab S, Sprecher U, Funk J, Apfel CM, Conde-Knape K, Qin Y, Mou L, Li X, Li X, Ilatovskaya ME, Andreev-Andrievsky AA, Pozdnev VF, Iliyn AV, Medvedeva NA, Malyszko J, Koc-Zorawska E, Zbroch E, Malyszko JS, Zorawski M, Mysliwiec M, Wakui H, Tamura K, Masuda SI, Tsurumi-Ikeya Y, Fujita M, Kanaoka T, Fujikawa T, Suzuki S, Kobayashi Y, Yabana M, Toya Y, Umemura S, Iimuro S, Imai E, Matsuo S, Watanabe T, Nitta K, Akizawa T, Makino H, Ohashi Y, Hishida A. Hypertension - experimental models. Nephrol Dial Transplant 2013. [DOI: 10.1093/ndt/gft128] [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: 11/12/2022] Open
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Coentrao L, Ribeiro C, Santos-Araujo C, Neto R, Pestana M, Rahman E, Rahman H, Ahmed D, Mousa D, El Bishlawi M, Shibahara H, Shibahara N, Takahashi S, Dupuis E, Duval X, Dornic Q, Bonnal C, Lucet JC, Cerceau O, Randoux C, Balde C, Besson F, Mentre F, Vrtovsnik F, Koutroubas G, Malindretos P, Zagotsis G, Makri P, Syrganis C, Mambelli E, Mancini E, Elia C, Guadagno V, Facchini MG, Zucchelli A, Grazia M, Patregnani L, Santoro A, Stefan G, Stefan G, Stancu S, Capusa C, Ailioaiei OR, Mircescu G, Anwar S, Little C, Kingston R, Diwakar P, Kaikini R, Syrganis C, Koutroubas G, Zagotsis G, Malindretos P, Makri P, Nikolaou E, Loukas G, Sabry A, Alsaran K, Al Sherbeiny S, Abdulkader M, Kwak I, Song S, Seong E, Lee S, Lee D, Kim I, Rhee H, Silva F, Queiros J, Malheiro J, Cabrita A, Rocha A, Bamidis P, Bamidis P, Liaskos C, Chryssogonidis I, Frantzidis C, Papagiannis A, Vrochides D, Lasaridis A, Nikolaidis P, Malindretos P, Kotwal S, Muir C, Hawley C, Snelling P, Gallagher M, Jardine M, Shibata K, Shibata K, Toya Y, Umemura S, Iwamoto T, Ono S, Ikeda E, Kitazawa A, Kuji T, Koguchi N, Satta H, Nishihara M, Kawata S, Kaneda T, Yamada Y, Murakami T, Yanagi M, Yasuda G, Mathieu S, Yves D, Jean-Michel T, Nicolas Q, Jean-Francois C, Ibrahim M, Abdel Salam M, Awadalla A, Bichari W, Zaki S, Roca-Tey R, Samon R, Ibrik O, Roda A, Gonzalez-Oliva JC, Martinez-Cercos R, Viladoms J, Lin CC, Yang WC, Kim YO, Yoon SA, Yun YS, Song HC, Kim BS, Cheong MA, Ogawa T, Kiba T, Okazaki S, Hatano M, Iwanaga M, Noiri C, Matsuda A, Hasegawa H, Mitarai T, DI Napoli A, DI Lallo D, Tazza L, De Cicco C, Salvatori MF, Chicca S, Guasticchi G, Gelev S, Trajceska L, Srbinovska E, Pavleska S, Oncevski A, Dejanov P, Gerasomovska V, Selim G, Sikole A, Wilson S, Mayne T, Krishnan M, Holland J, Volz A, Good L, Nissenson A, Stavroulopoulos A, Aresti V, Maragkakis G, Kyriakides S, Rikker C, Rikker C, Juhasz E, Tornoci L, Tovarosi S, Greguschik J, Mag O, Rosivall L, Golebiowski T, Golebiowski T, Watorek E, Kusztal M, Letachowicz K, Letachowicz W, Madziarska K, Augustyniak Bartosik H, Krajewska M, Weyde W, Klinger M, Capitanini A, Lange S, Cupisti A, Schier T, Gobel G, Bosmuller C, Gruber I, Tiefenthaler M, Shipley T, Adam J, Sweeney D, Fenwick S, Mansy H, Ahmed S, Moore I, Iwamoto T, Shibata K, Yasuda G, Kaneda T, Murakami T, Kuji T, Koguchi N, Satta H, Nishihara M, Kawata S, Yanagi M, Yamada Y, Ono S, Ikeda E, Kitazawa A, Toya Y, Umemura S, Vigeral P, Saksi S, Flamant M, Boulanger H, Kim YO, Yoon SA, Yun YS, Song HC, Kim BS, Park WD, Cheong MA, Nikam M, Tavakoli A, Chemla E, Evans J, Malete H, Matyas L, Mogan I, Lazarides M, Ebner A, Shi Y, Shi Y, Zhang J, Cheng J, Frank LR, Melanie H, Dominique B, Michel G, Ikeda K, Yasuda T, Yotueda H, Nikam M, Ebah L, Jayanti A, Evans J, Kanigicherla D, Summers A, Manley G, Dutton G, Chalmers N, Mitra S, Checherita IA, Niculae A, Radulescu D, David C, Turcu FL, Ciocalteu A, Persic V, Persic V, Buturovic-Ponikvar J, Ponikvar R, Touam M, Touam M, Menoyo V, Drueke T, Rifaat M, Muresan C, Abtahi M, Koochakipour Z, Joly D, Baharani J, Rizvi S, Ng KP, Buzzi L, Sarcina C, Alberghini E, Ferrario F, Baragetti I, Santagostino G, Furiani S, Corghi E, Sarcina C, Terraneo V, Rastelli F, Bacchini G, Pozzi C, Adorati Menegato M, Mortellaro R, Locicero A, Romano A, Manzini PP, Steckiph D, Shintaku S, Kawanishi H, Moriishi M, Bansyodani M, Nakamura S, Saito M, Tsuchiya S, Barros F, Vaz R, Carvalho B, Neto R, Martins P, Pestana M, Likaj E, Likaj E, Seferi S, Rroji M, Idrizi A, Duraku A, Barbullushi M, Thereska N, Shintaku S, Kawanishi H, Moriishi M, Bansyodani M, Nakamura S, Saito M, Tsuchiya S. Vascular access. Nephrol Dial Transplant 2012. [DOI: 10.1093/ndt/gfs226] [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: 11/12/2022] Open
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Takasawa K, Takaeda C, Higuchi M, Maeda T, Tomosugi N, Ueda N, Sasaki Y, Ikezoe M, Hagiwara M, Furuhata S, Murakami M, Shimonaka Y, Yamazaki S, Hamahata S, Hamahata S, Oue M, Kuragano T, Furuta M, Yahiro M, Kida A, Otaki Y, Hasuike Y, Nonoguchi H, Nakanishi T, Sarafidis P, Rumjon A, Ackland D, Maclaughlin H, Bansal SS, Macdougall IC, Panichi V, Rosati A, Malagnino E, Giusti R, Casani A, Betti G, Conti P, Bernabini G, Bernabini G, Gabrielli C, Caiani D, Scatena A, Migliori M, Pizzarelli F, Mitsopoulos E, Tsiatsiou M, Minasidis I, Kousoula V, Intzevidou E, Passadakis P, Vargemezis V, Tsakiris D, Yahiro M, Kida A, Otaki Y, Hasuike Y, Nonoguchi H, Nakanishi T, Kuragano T, Lines SW, Carter AM, Dunn EJ, Wright MJ, Aoyagi R, Miura T, De Paola L, Lombardi G, Coppolino G, Lombardi L, Hasuike Y, Fukumoto H, Kaibe S, Tokuyama M, Kida A, Otaki Y, Kuragano T, Nonoguchi H, Hiwasa M, Miyamoto T, Ohue H, Matsumoto A, Toyoda K, Nakanishi T, Rottembourg J, Emery C, Lafuma A, Wernli J, Zakin L, Mahi L, Borzych-Duzalka D, Bilginer Y, Pape L, Ha IS, Bak M, Chua A, Rees L, Pesle S, Cano F, Urzykowska A, Emre S, Russcasso J, Ramela V, Printza N, White C, Kuzmanovska D, Andrea V, Muller-Wiefel D, Warady B, Schaefer F, Chung JH, Park MK, Kim HL, Shin BC, Fujikawa T, Kuji T, Kakimoto M, Shibata K, Satta H, Nishihara M, Kawata S, Koguchi N, Toya Y, Umemura S, David V, Michel G, Maxime H, Paul L, Sebastien K, Francois V, Kuntsevich V, Dou Y, Thijssen S, Levin NW, Kotanko P, Kim BS, Kim BS, Park WD, Song HC, Kim HG, Kim YO, Woodburn K, Fong KL, Moriya Y, Tagawa Y, Maeda T, Kanda F, Morita N, Tomosugi N, London G, London G, Zaoui P, Covic A, Dellanna F, Goldsmith D, Gesualdo L, Mann J, Combe C, Turner M, Meunzberg M, Macdonald K, Abraham I, Gesualdo L, Combe C, Covic A, Dellanna F, Goldsmith D, London G, Mann J, Zaoui P, Turner M, Meunzberg M, Macdonald K, Abraham I, Rottembourg J, Guerin A, Diaconita M, Apruzzese R, Dou Y, Thijssen S, Kruse A, Ouellet G, Levin NW, Kotanko P, Bond C, Jensen D, Wang S, Pham E, Rubin J, Sika M, Niecestro R, Woodburn K, Fong KL, Sloneker S, Strzemienski P, Solon E, Moriya Y, Tagawa Y, Stamopoulos D, Mpakirtzi N, Grapsa E, Gogola B, Manios E, Afentakis N, Ewer J, Macdougall IC. Renal anaemia - CKD 5D. Nephrol Dial Transplant 2012. [DOI: 10.1093/ndt/gfs244] [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: 11/13/2022] Open
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Santos C, Ventura A, Gomes AM, Pereira S, Almeida C, Seabra J, Segelmark M, Mattsson L, Said S, Olde B, Solem K, Yu X, Zhang B, Sun B, Mao H, Xing C, Gruss E, Portoles J, Tato A, Lopez-Sanchez P, Jimenez P, de la Cruz R, Furaz K, Martinez S, Mas M, Andres MM, Corchete E, Kim YO, Kim HG, Kim BS, Song HC, Choi EJ, Ibeas J, Vallespin J, Fortuno JR, Rodriguez-Jornet A, Grau C, Merino J, Branera J, Perendreu J, Granados I, Mateos A, Jimeno V, Moya C, Ramirez J, Falco J, Gimenez A, Garcia M, Morgado E, Pinho A, Guedes A, Guerreiro R, Mendes P, Bexiga I, Silva A, Marques J, Neves P, Shibata K, Iwamoto T, Murakami T, Ono S, Kaneda T, Kuji T, Kawata S, Satta H, Tamura K, Toya Y, Yanagi M, Umemura S, Yasuda G, Yong OL, Lim WWL, Yong KM, Tay KH, Lim EK, Yang WS, Tan SG, Choong HL, Hill A, Blatter D, Kim YO, Kim HG, Song HC, Choi EJ, Kim SY, Min JK, Park WD, Kim HG, Kim YO, Kim BS, Kim SY, Min JK, Park WD, Ibeas J, Fortuno JR, Branera J, Rodriguez- Jornet A, Perendreu J, Marcet M, Vinuesa X, Mateo A, Jimeno V, Fernandez M, Moya C, Rivera J, Falco J, Garcia M, Shibahara H, Shibahara N, Takahashi S, Shibahara H, Shibahara N, Takahashi S, Kanaa M, Wright MJ, Sandoe JAT, Freudiger H, Dupret J, Jacquemoud MC, Rossi L, Kampouris C, Hatzimpaloglou A, Karamouzis M, Pliakos C, Malindretos P, Roudenko I, Grekas D, Costa AC, Santana A, Neves F, Costa AGD, Chaudhry M, Bhola C, Joarder M, Lok C, Coentrao L, Faria B, Frazao J, Pestana M, Sun XF, Yang Y, Wang J, Lin HL, Li JJ, Yao L, Zhao JY, Zhang ZM, Lun LD, Zhang JR, Zhang YM, Li MX, Jiang SM, Wang Y, Zhu HY, Chen XM, Caeiro F, Carvalho D, Cruz J, Ribeiro dos Santos J, Nolasco F, Bartlett R, Pandya B, Viana N, Machado S, Gil C, Lucas C, Mendes A, Barata J, Freitas L, Campos M, Rikker C, Juhasz E, Toth A, Vizi I, Tornoci L, Rosivall L, Tovarosi S, Cho S, Kim S, Lee YJ, Kanai H, Harada K, Nasu S, Shinozaki M, Shibahara N, Shibahara H, Takahashi S, Esenturk M, Zengin M, Ogun F, Akdemir A, Colak C, Pekince G, Gerasimovska V, Oncevski A, Gerasimovska-Kitanovska B, Sikole A, Kiselev N, Chernyshev S, Zlokazov V, Idov E, Bacallao Mendez R, Avila A, Salgado J, Llerena B, Badell A, Aties M, Severn A, Metcalfe W, Traynor J, Boyd J, Kerssens J, Henderson A, Simpson K, Roca-Tey R, Samon S, Ibrik O, Roda E, Gonzalez JC, Viladoms J, Malindretos P, Bamidis P, Liaskos C, Papagiannis A, Vrochides D, Frantzidis C, Sarafidis P, Lasaridis A, Chryssogonidis I, Nikolaidis P, Ibeas J, Vallespin J, Fortuno JR, Merino J, Rodriguez-Jornet A, Branera J, Grau C, Granados I, Mateos A, Jimeno V, Perndreu J, Moya C, Rivera J, Falco J, Gimenez A, Garcia M, Moyses Neto M, Ferreira V, Martinez R, Tercariol CAS, Lima DAFS, Figueiredo JFC, Costa JAC, Alayoud A, Hamzi A, Akhmouch I, Aatif T, Oualim Z, Jankovic A, Ilic M, Damjanovic T, Djuric Z, Popovic J, Adam J, Dimkovic N. Vascular access. Clin Kidney J 2011. [DOI: 10.1093/ndtplus/4.s2.39] [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: 11/12/2022] Open
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Murakami T, Kaneda T, Ono S, Shibata K, Satta H, Iwamoto T, Sugimoto K, Toya Y, Umemura S. P1.12 COMPARISON OF CLINICAL USEFULNESS BETWEEN STIFFNESS PARAMETER BETA (SPB) AND PULSE WAVE VELOCITY (PWV). Artery Res 2010. [DOI: 10.1016/j.artres.2010.10.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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Tsurumi Y, Tamura K, Tanaka Y, Koide Y, Sakai M, Yabana M, Noda Y, Hashimoto T, Kihara M, Hirawa N, Toya Y, Kiuchi Y, Iwai M, Horiuchi M, Umemura S. Interacting molecule of AT1 receptor, ATRAP, is colocalized with AT1 receptor in the mouse renal tubules. Kidney Int 2006; 69:488-94. [PMID: 16514431 DOI: 10.1038/sj.ki.5000130] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.7] [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: 11/09/2022]
Abstract
The renin-angiotensin system in the kidney plays a critical role in the regulation of renal hemodynamics and sodium handling through the activation of vascular, glomerular and tubular angiotensin II type 1 (AT1) receptor-mediated signaling. We previously cloned a molecule that specifically bound to the AT1 receptor and modulated AT1 receptor signaling in vitro, which we named ATRAP (for AT1 receptor-associated protein). The purpose of this study is to analyze the renal distribution of ATRAP and to examine whether ATRAP is co-expressed with the AT1 receptor in the mouse kidney. We performed in situ hybridization, Western blot analysis, and immunohistochemistry to investigate the expression of ATRAP mRNA and protein in the mouse kidney. The results of Western blot analysis revealed the ATRAP protein to be abundantly expressed in the kidney. Employing in situ hybridization and immunohistochemistry, we found that both ATRAP mRNA and the protein were widely distributed along the renal tubules from Bowman's capsules to the inner medullary collecting ducts. ATRAP mRNA was also detected in the glomeruli, vasculature, and interstitial cells. In all tubular cells, the ATRAP protein colocalized with the AT1 receptor. Finally, we found that the dietary salt depletion significantly decreased the renal expression of ATRAP as well as AT1 receptor. These findings show ATRAP to be abundantly and broadly distributed in nephron segments where the AT1 receptor is expressed. Furthermore, this is the first report demonstrating a substantial colocalization of ATRAP and AT1 receptor in vivo.
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MESH Headings
- Adaptor Proteins, Signal Transducing/analysis
- Adaptor Proteins, Signal Transducing/genetics
- Adaptor Proteins, Signal Transducing/physiology
- Animals
- Blotting, Western
- Diet, Sodium-Restricted
- Gene Expression Regulation/drug effects
- Immunohistochemistry
- In Situ Hybridization
- Kidney Glomerulus/chemistry
- Kidney Glomerulus/physiology
- Kidney Tubules/chemistry
- Kidney Tubules/physiology
- Male
- Mice
- Mice, Inbred C57BL
- RNA, Messenger/analysis
- RNA, Messenger/genetics
- Receptor, Angiotensin, Type 1/analysis
- Receptor, Angiotensin, Type 1/genetics
- Receptor, Angiotensin, Type 1/physiology
- Renin-Angiotensin System/physiology
- Signal Transduction
- Sodium/pharmacology
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Affiliation(s)
- Y Tsurumi
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Japan
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27
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Ando T, Takahashi M, Nakajima T, Toya Y, Watanabe H, Kokubun H, Tatsuzawa F. Delphinidin accumulation is associated with abnormal flower development in petunias. Phytochemistry 2004; 65:2219-2227. [PMID: 15587706 DOI: 10.1016/j.phytochem.2004.06.028] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The relative floral anthocyanidin contents of 195 commercial petunias with floral colours other than white and yellow were determined using HPLC, and the presence of five anthocyanidins (cyanidin, peonidin, delphinidin, petunidin, and malvidin) was confirmed. Pelargonidin was not detected, and delphinidin was not a major component. Using a principal component analysis of the relative anthocyanidin contents, the petunias were classified into three phenotype-groups accumulating cyanidin, peonidin, or malvidin, (plus petunidin) as the major anthocyanidin. A fourth phenotype was segregated in the progeny obtained by self-pollinating an F1 hybrid of the malvidin group; this accumulated delphinidin 3-glucoside in a markedly crumpled corolla-limb (delphinidin group). Such inferior floral traits, associated with the accumulation of delphinidin 3-glucoside, are thought to be the driving force that removed the delphinidin group from commercial petunias. A comparison of flowers of the delphinidin group and those of the other groups may provide a useful tool towards a deeper understanding of how anthocyanin biosynthesis relates to normal development of the corolla.
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Affiliation(s)
- Toshio Ando
- Faculty of Horticulture, Chiba University, Matsudo City, Chiba 271-8510, Japan.
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28
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Yokoyama K, Teranishi Y, Toya Y, Shirai T, Fukuda Y, Aoyama M, Akahane Y, Inoue N, Ueda H, Yamakawa K, Yokoyama A, Yamada H, Yabushita A, Sugita A. Optimal control of ultrafast selection. J Chem Phys 2004; 120:9446-9. [PMID: 15267954 DOI: 10.1063/1.1752882] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Optimal laser control for ultrafast selection of closely lying excited states whose energy separation is smaller than the laser bandwidth is reported on the two-photon transition of atomic cesium; Cs(6S-->7D(J), J=5/2 and 3/2). Selective excitation was carried out by pulse shaping of ultrashort laser pulses which were adaptively modulated in a closed-loop learning system handling eight parameters representing the electric field. Two-color fluorescence from the respective excited states was monitored to measure the selectivity. The fitness used in the learning algorithm was evaluated from the ratio of the fluorescence yields. After fifty generations, a pair of nearly transform-limited pulses were obtained as an optimal pulse shape, proving the effectiveness of the "Ramsey fringes" mechanism. The contrast of the selection ratio was improved by approximately 30% from the simple "Ramsey fringes" experiment.
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Affiliation(s)
- K Yokoyama
- Advanced Photon Research Center, Japan Atomic Energy Research Institute, Kizu-cho, Kyoto 619-0215, Japan
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Okano Y, Hirawa N, Tamura K, Kihara M, Toya Y, Tochikubo O, Umemura S. RELATIONSHIPS BETWEEN DIURNAL BLOOD PRESSURE VARIATION, AUTONOMIC FUNCTION AND HEALTH-RELATED QOL IN HYPERTENSIVE SUBJECTS. J Hypertens 2004. [DOI: 10.1097/00004872-200402001-00816] [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]
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30
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Ando T, Tatsuzawa F, Toya Y, Watanabe H, Hirayama Y, Shinoda K, Hara R, Seki H. Acylated Peonidin 3-Rutinoside-5-glucosides from Commercial Petunia Cultivars with Pink Flowers. HETEROCYCLES 2004. [DOI: 10.3987/com-03-9963] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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31
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Yasuda G, Kuji T, Hasegawa K, Hirawa N, Kihara M, Toya Y, Shionoiri H, Umemura S. Safety and efficacy of a biliary-excreted angiotensin converting enzyme (ACE) inhibitor, temocapril, in combination with amlodipine in advanced diabetic nephropathy. Clin Exp Nephrol 2002. [DOI: 10.1007/s101570200039] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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32
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Onda T, Hashimoto Y, Nagai M, Kuramochi H, Saito S, Yamazaki H, Toya Y, Sakai I, Homcy CJ, Nishikawa K, Ishikawa Y. Type-specific regulation of adenylyl cyclase. Selective pharmacological stimulation and inhibition of adenylyl cyclase isoforms. J Biol Chem 2001; 276:47785-93. [PMID: 11602596 DOI: 10.1074/jbc.m107233200] [Citation(s) in RCA: 92] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Crystallographic studies have elucidated the binding mechanism of forskolin and P-site inhibitors to adenylyl cyclase. Accordingly, computer-assisted drug design has enabled us to identify isoform-selective regulators of adenylyl cyclase. After examining more than 200 newly synthesized derivatives of forskolin, we found that the modification at the positions of C6 and C7, in general, enhances isoform selectivity. The 6-(3-dimethylaminopropionyl) modification led to an enhanced selectivity for type V, whereas 6-[N-(2-isothiocyanatoethyl) aminocarbonyl] and 6-(4-acrylbutyryl) modification led to an enhanced selectivity for type II. In contrast, 2'-deoxyadenosine 3'-monophosphate, a classical and 3'-phosphate-substituted P-site inhibitor, demonstrated a 27-fold selectivity for inhibiting type V relative to type II, whereas 9-(tetrahydro-2-furyl) adenine, a ribose-substituted P-site ligand, showed a markedly increased, 130-fold selectivity for inhibiting type V. Consequently, on the basis of the pharmacophore analysis of 9-(tetrahydro-2-furyl) adenine and adenylyl cyclase, a novel non-nucleoside inhibitor, 2-amino-7-(2-furanyl)-7,8-dihydro-5(6H)-quinazolinone (NKY80), was identified after virtual screening of more than 850,000 compounds. NKY80 demonstrated a 210-fold selectivity for inhibiting type V relative to type II. More importantly, the combination of a type III-selective forskolin derivative and 9-(tetrahydro-2-furyl) adenine or NKY80 demonstrated a further enhanced selectivity for type III stimulation over other isoforms. Our data suggest the feasibility of adenylyl cyclase isoform-targeted regulation of cyclic AMP signaling by pharmacological reagents, either alone or in combination.
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Affiliation(s)
- T Onda
- Research and Development Division, Pharmaceuticals Group, Nippon Kayaku Co., Ltd., Tokyo 115-8588, Japan
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Fujita T, Toya Y, Iwatsubo K, Onda T, Kimura K, Umemura S, Ishikawa Y. Accumulation of molecules involved in alpha1-adrenergic signal within caveolae: caveolin expression and the development of cardiac hypertrophy. Cardiovasc Res 2001; 51:709-16. [PMID: 11530104 DOI: 10.1016/s0008-6363(01)00348-0] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.0] [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] [Indexed: 10/17/2022] Open
Abstract
OBJECTIVE Caveolin, a major protein component of caveolae, is now considered to be an inhibitor of cellular growth and proliferation. In this study, we examined the localization of the molecules involved in alpha1-adrenergic receptor signal relative to that of caveolin in the heart and the changes in caveolin expression during the development of hypertrophy in SHR. METHODS We purified the caveolar protein fractions from rat cardiac tissues, H9C2 cells, and rat vascular smooth muscle cells. Using radioligand receptor binding assay and immunoblot analysis, we examined the distribution and the amount of alpha1-AR and caveolin. RESULTS Caveolin-3, the alpha1-adrenergic receptor, Gq and PLC-beta subtypes (PLC-beta1, -beta3) were found exclusively in the caveolar fraction in the above tissues. Caveolin-3 were co-immunoprecipitated with alpha1-adrenergic receptor and Gq from the cardiac tissues. The amount of caveolin subtypes expression (caveolin-1 and -3) and the amount of the alpha1-adrenergic receptor were examined in the hearts of SHR and age-matched WKY (4- and 24-weeks-old). The amount of caveolin-3 expression was significantly smaller in SHR at 24-weeks-old than that in SHR at 4-weeks-old and that in WKY at 24-weeks-old. CONCLUSIONS The molecules involved in alpha1-adrenergic signaling are confined to the same microdomain as caveolin. A decrease in caveolin-3 expression may play a role in the development of cardiac hypertrophy in SHR, presumably through de-regulating the inhibition of growth signal in the hearts of SHR in the hypertrophic stage.
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Affiliation(s)
- T Fujita
- Department of Medicine and Physiology, Yokohama City University School of Medicine, Yokohama 236, Japan
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34
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Tamura K, Takagi N, Yabana M, Kihara M, Toya Y, Takizawa T, Takeshita Y, Tokita Y, Inayama Y, Umemura S. Nephrotic syndrome due to membranous glomerulonephritis in a patient with idiopathic thrombocytopenic purpura. Nephron Clin Pract 2000; 82:87-9. [PMID: 10224496 DOI: 10.1159/000045379] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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35
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Kobayashi S, Umemura S, Toya Y. [alpha-Adrenergic receptor gene]. Nihon Rinsho 2000; 58 Suppl 1:540-5. [PMID: 11026329] [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: 02/17/2023]
Affiliation(s)
- S Kobayashi
- Second Department of Internal Medicine, Yokohama City University School of Medicine
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36
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Yabana M, Kihara M, Toya Y, Tamura K, Takagi N, Kurita K, Onishi M, Umemura S. Control of high hematocrit levels in a hemodialysis patient with an angiotensin-converting enzyme inhibitor. Nephron Clin Pract 1999; 83:181-2. [PMID: 10516507 DOI: 10.1159/000045505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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37
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Ishigami T, Tamura K, Fujita T, Kobayashi I, Hibi K, Kihara M, Toya Y, Ochiai H, Umemura S. Angiotensinogen gene polymorphism near transcription start site and blood pressure: role of a T-to-C transition at intron I. Hypertension 1999; 34:430-4. [PMID: 10489389 DOI: 10.1161/01.hyp.34.3.430] [Citation(s) in RCA: 33] [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: 11/16/2022]
Abstract
Molecular variants of the angiotensinogen gene, a key component of the renin-angiotensin system, are considered genetic risk factors for primary hypertension. A relation between the angiotensinogen gene locus and hypertension has been found in whites, Japanese, and African Caribbeans but not in Chinese. The lack of a consistent association between M235T polymorphism at exon 2 and hypertension has suggested that another site in linkage disequilibrium with M235T is the causal mutation. We studied the relations among plasma angiotensinogen concentrations, blood pressure, related clinical variables, and mutations of the 5' upstream core promoter region of the human angiotensinogen gene in 274 subjects recruited from our outpatient clinic. We confirmed that plasma angiotensinogen concentration was significantly correlated with A-20C mutation and percent body fat and found that systolic and diastolic blood pressures were significantly correlated with G-6A and T+68C mutations. These results suggest that mutations near the transcription start site may be associated with increased blood pressure.
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Affiliation(s)
- T Ishigami
- Yokohama City University, Internal Medicine II, Yokohama City, Japan.
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38
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Schwencke C, Yamamoto M, Okumura S, Toya Y, Kim SJ, Ishikawa Y. Compartmentation of cyclic adenosine 3',5'-monophosphate signaling in caveolae. Mol Endocrinol 1999; 13:1061-70. [PMID: 10406458 DOI: 10.1210/mend.13.7.0304] [Citation(s) in RCA: 29] [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] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
The cAMP-signaling pathway is composed of multiple components ranging from receptors, G proteins, and adenylyl cyclase to protein kinase A. A common view of the molecular interaction between them is that these molecules are disseminated on the plasma lipid membrane and random collide with each other to transmit signals. A limitation to this idea, however, is that a signaling cascade involving multiple components may not occur rapidly. Caveolae and their principal component, caveolin, have been implicated in transmembrane signaling, particularly in G protein-coupled signaling. We examined whether caveolin interacts with adenylyl cyclase, the membrane-bound enzyme that catalyzes the conversion of ATP to cAMP. When overexpressed in insect cells, types III, IV, and V adenylyl cyclase were localized in caveolin-enriched membrane fractions. Caveolin was coimmunoprecipitated with adenylyl cyclase in tissue homogenates and copurified with a polyhistidine-tagged form of adenylyl cyclase by Ninitrilotriacetic acid resin chromatography in insect cells, suggesting the colocalization of adenylyl cyclase and caveolin in the same microdomain. Further, the regulatory subunit of protein kinase A (RIIalpha, but not RIalpha) was also enriched in the same fraction as caveolin. Gsalpha was found in both caveolin-enriched and non-caveolin-enriched membrane fractions. Our data suggest that the cAMP-signaling cascade occurs within a restricted microdomain of the plasma membrane in a highly organized manner.
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Affiliation(s)
- C Schwencke
- Cardiovascular & Pulmonary Research Institute, Allegheny University of the Health Sciences, Pittsburgh, Pennsylvania 15212, USA
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39
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Kihara M, Yabana M, Toya Y, Kobayashi S, Fujita T, Iwamoto T, Ishigami T, Umemura S. Angiotensin II inhibits interleukin-1 beta-induced nitric oxide production in cultured rat mesangial cells. Kidney Int 1999; 55:1277-83. [PMID: 10200991 DOI: 10.1046/j.1523-1755.1999.00377.x] [Citation(s) in RCA: 17] [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: 11/20/2022]
Abstract
BACKGROUND Macrophage-type nitric oxide synthase (NOS-II) is expressed in glomerular mesangial cells in response to inflammatory cytokines. Nitric oxide (NO) has antithrombotic and cytostatic activities in glomerular diseases. Recent studies have suggested that several vasoactive substances and growth factors modulate NO production in a tissue-specific manner. The aim of this study was to examine whether angiotensin II and transforming growth factor-beta (TGF-beta) modulate cytokine-stimulated NO production and NOS-II gene expression in rat glomerular mesangial cells. METHODS Cultured rat mesangial cells were incubated with interleukin-1 beta (IL-1 beta) for 24 hours. The effects of angiotensin II and TGF-beta on stimulated nitrite accumulation and NOS-II mRNA levels were determined. RESULTS Angiotensin II and TGF-beta significantly decreased IL-1 beta-stimulated nitrite accumulation. The angiotensin type 1 receptor antagonist CV11974 prevented angiotensin II-mediated inhibition of NO production. TGF-beta-neutralizing antibody reversed the effect of TGF-beta without affecting angiotensin II-mediated inhibition of NO production. TGF-beta markedly decreased steady-state levels of NOS-II mRNA and the half-life of the message, whereas angiotensin II did not alter these parameters. CONCLUSIONS These results suggest that in mesangial cells, angiotensin II and TGF-beta participate in the inhibitory regulation of cytokine-induced NO production. TGF-beta inhibits NO production by decreasing NOS-II mRNA levels, whereas angiotensin II may regulate NO production at the levels after NOS-II gene expression. An autocrine action of TGF-beta induced by angiotensin II is unlikely to contribute to angiotensin II-mediated inhibition of NO production.
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Affiliation(s)
- M Kihara
- Department of Medicine II, Yokohama City University, Japan
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Abstract
Caveolin is a major structural component of caveolae and has been implicated in the regulation of the function of several caveolae-associated signaling molecules. Platelet-derived growth factor (PDGF) receptors and caveolin were colocalized in the same subcellular fraction after sucrose density gradient fractionation of fibroblasts. Additionally, we found that the PDGF receptors interacted with caveolin in NIH3T3 fibroblast cells. We then examined whether caveolin directly binds to PDGF receptors and inhibits kinase activity using a recombinant PDGF receptor overexpressed in insect cells and peptides derived from the scaffolding domain of caveolin subtypes. We found the peptide from caveolin-1 and -3, but not -2, inhibited the autophosphorylation of PDGF receptors in a dose-dependent manner. Similarly, caveolin-1 and -3 peptides directly bound to PDGF receptors. Mutational analysis using a series of truncated caveolin-3 peptides (20-, 17-, 14-, and 11-mer peptides) revealed that at least 17 amino acid residues of the peptide were required to inhibit and directly bind to PDGF receptors. Thus, our findings suggest that PDGF receptors directly interact with caveolin subtypes, leading to the inhibition of kinase activity. Caveolin may be another regulating factor of PDGF-mediated tyrosine kinase signaling.
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Affiliation(s)
- M Yamamoto
- Cardiovascular and Pulmonary Research Institute, Allegheny University of the Health Sciences, Pittsburgh, Pennsylvania, 15212, USA
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Yabana M, Kihara M, Toya Y, Tamura K, Matsumoto K, Takagi N, Kamijo S, Ishii M, Umemura S. Simultaneous improvement of minimal-change nephrotic syndrome and anemia with steroid therapy. Nephron Clin Pract 1999; 81:84-8. [PMID: 9884426 DOI: 10.1159/000045252] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
A 56-year-old man presented with transient anemia in minimal-change nephrotic syndrome. Following nephrotic syndrome, anemia suddenly appeared without renal dysfunction. The anemia might be attributable to hemodilution because of significant correlations between the values of hemoglobin concentration and serum total protein or blood urea nitrogen during the clinical course. A low serum level and a low urinary excretion of erythropoietin were found, and when nephrotic syndrome ameliorated with steroid therapy, urinary erythropoietin excretion and anemia disappeared. This case indicated disappearance of the exponential increase of endogenous erythropoietin in acute anemia in nephrotic syndrome probably due to urinary losses and altered biosynthesis of erythropoietin. We report a case of the simultaneous improvement of both nephrotic syndrome and anemia with steroid therapy.
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Affiliation(s)
- M Yabana
- 2nd Department of Internal Medicine, Yokohama City University School of Medicine, Yokohama, Japan
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Yabana M, Ikeda Y, Kihara M, Kurita K, Toya Y, Tamura K, Takagi N, Onishi T, Umemura S. Good response of endogenous erythropoietin to blood loss in persistently improving renal anemia after discontinuation of erythropoietin treatment. Nephron Clin Pract 1999; 81:111-2. [PMID: 9884433 DOI: 10.1159/000045259] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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43
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Abstract
Recent data have demonstrated that caveolin, a major structural protein of caveolae, negatively regulates signaling molecules localized to caveolae. The interaction of caveolin with several caveolae-associated signaling proteins is mediated by the binding of the scaffolding region of caveolin to a hydrophobic amino acid-containing region within the regulated proteins. The presence of a similar motif within the insulin receptor kinase prompted us to investigate the caveolar localization and regulation of the insulin receptor by caveolin. We found that overexpression of caveolin-3 augmented insulin-stimulated phosphorylation of insulin receptor substrate-1 in 293T cells but not the phosphorylation of insulin receptor. Peptides corresponding to the scaffolding domain of caveolin potently stimulated insulin receptor kinase activity toward insulin receptor substrate-1 or a Src-derived peptide in vitro and in a caveolin subtype-dependent fashion. Peptides from caveolin-2 exhibited no effect, whereas caveolin-1 and -3 stimulated activity 10- and 17-fold, respectively. Peptides which increased insulin receptor kinase activity did so without affecting insulin receptor auto-phosphorylation. Furthermore, the insulin receptor bound to immobilized caveolin peptides, and this binding was inhibited in the presence of free caveolin-3 peptides. Thus, we have identified a novel mechanism by which the insulin receptor is bound and activated by specific caveolin subtypes. Furthermore, these data define a new role for caveolin as an activator of signaling.
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Affiliation(s)
- M Yamamoto
- Cardiovascular and Pulmonary Research Institute, Allegheny University of the Health Sciences, Pittsburgh, Pennsylvania 15212, USA
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44
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Tamura K, Nyui N, Tamura N, Fujita T, Kihara M, Toya Y, Takasaki I, Takagi N, Ishii M, Oda K, Horiuchi M, Umemura S. Mechanism of angiotensin II-mediated regulation of fibronectin gene in rat vascular smooth muscle cells. J Biol Chem 1998; 273:26487-96. [PMID: 9756884 DOI: 10.1074/jbc.273.41.26487] [Citation(s) in RCA: 42] [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: 01/27/2023] Open
Abstract
This study was performed to investigate a mechanism of angiotensin II (Ang II)-mediated activation of the fibronectin (FN) gene in rat vascular smooth muscle cells. Actinomycin D and CV11974 completely inhibited Ang II-mediated increase in FN mRNA levels. Inhibitors of protein kinase C (PKC), protein-tyrosine kinase (PTK), phosphatidylinositol-specific phospholipase C, Ras, phosphatidylinositol 3-kinase, p70 S6 kinase, and Ca2+/calmodulin kinase also decreased Ang II-induced activation of FN mRNA. In contrast, cycloheximide; PD123319; or inhibitors of Gi, protein kinase A, or mitogen-activated protein kinase kinase did not affect the induction. FN promoter contained a putative AP-1 binding site (rFN/AP-1; -463 to -437), and the results of a transient transfection and electrophoretic mobility shift assay showed that Ang II enhanced rFN/AP-1 activity. CV11974 and inhibitors of PKC or PTK suppressed Ang II-mediated increases in rFN/AP-1 activity, although neither PD123319 nor a protein kinase A inhibitor affected the induction. Furthermore, mutation of rFN/AP-1 that disrupted nuclear binding suppressed Ang II-induced transcription in the native FN promoter (-1908 to +136) context. Thus, Ang II activates transcription of the FN gene through the Ang II type 1 receptor in vascular smooth muscle cells, at least in part, via the activation of AP-1 by a signaling mechanism dependent on PKC and PTK.
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Affiliation(s)
- K Tamura
- Department of Internal Medicine II, Yokohama City University School of Medicine, Yokohama 236, Japan.
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45
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Abstract
BACKGROUND Renin is a rate-limiting enzyme for activity of the circulating renin-angiotensin system (RAS) and expression of the renin gene is regulated by a variety of stimuli. In this study, we examined a possible role of c-Jun in the transcription of renin gene. METHODS The renin promoter, chloramphenicol acetyltransferase (CAT), fusion genes with or without c-Jun expression vector (pSV-c-Jun) were transfected into human embryonic kidney (HEK) cells, and the effects of c-Jun were examined by deletion and mutation analyses of CAT assay and by in vitro transcription-primer extension assay. We also examined the effects of c-Jun on DNA-binding activity to the renin promoter by electrophoretic mobility shift assay (EMSA). Furthermore, we examined the effects of c-Jun on transcription of the renin gene in enriched juxtaglomerular (JG) cells by cotransfection with pSV-c-Jun and by treatment with antisense c-jun oligodeoxynucleotides. RESULTS Promoter activity of the renin gene was increased by c-Jun overexpression in HEK cells, and the proximal promoter region from -47 to +16 was sufficient for transcriptional activation by c-Jun. Although mutation of activator protein-1 (AP-1) element-like sequences in the proximal promoter did not affect c-Jun-mediated stimulation, mutation of the core promoter including the TATA box inhibited c-Jun-mediated transcription. The results of EMSA showed that c-Jun overexpression produced a binding of nuclear factor, which was HEK cell-specific and distinct from TATA box-binding protein and AP-1 family transcription factor, to the renin core promoter region (RC element) from -36 to -20. The overexpression of c-Jun activated the renin promoter in renin-expressing JG cells, and antisense c-jun decreased the activity of renin promoter and expression of renin mRNA in JG cells. CONCLUSIONS These results indicate that the RC element plays a role in c-Jun-mediated transcriptional regulation of the renin gene in HEK cells, and suggest that c-Jun participates in the regulation of renin gene expression in JG cells of the kidney.
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Affiliation(s)
- K Tamura
- Department of Internal Medicine II, Yokohama City University School of Medicine, Japan.
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Tamura K, Umemura S, Nyui N, Hibi K, Ishigami T, Kihara M, Toya Y, Ishii M. Activation of angiotensinogen gene in cardiac myocytes by angiotensin II and mechanical stretch. Am J Physiol 1998; 275:R1-9. [PMID: 9688953 DOI: 10.1152/ajpregu.1998.275.1.r1] [Citation(s) in RCA: 15] [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] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Circulating and cardiac renin-angiotensin systems (RAS) play important roles in the development of cardiac hypertrophy. Mechanical stretch of cardiac myocytes induces secretion of ANG II and evokes hypertrophic responses. Angiotensinogen is a unique substrate of the RAS. This study was performed to examine the regulation of the angiotensinogen gene in cardiac myocytes in response to ANG II and stretch. ANG II and stretch significantly increased the levels of angiotensinogen mRNA in cardiac myocytes. Actinomycin D completely inhibited ANG II- and stretch-mediated increases in angiotensinogen mRNA. Although CV-11974 abolished ANG II-mediated increases in mRNA level and promoter activity of the angiotensinogen gene, the inhibition of stretch-mediated activation by CV-11974 was significant but not complete. These results indicate that ANG II activates transcription of the angiotensinogen gene exclusively via ANG II type 1-receptor pathway and that stretch activates such transcription mainly via the same pathway in cardiac myocytes. Furthermore, factors other than ANG II may also be involved in stretch-mediated activation of the angiotensinogen gene in cardiac myocytes.
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MESH Headings
- Angiotensin II/pharmacology
- Angiotensin Receptor Antagonists
- Angiotensinogen/biosynthesis
- Angiotensinogen/genetics
- Animals
- Animals, Newborn
- Benzimidazoles/pharmacology
- Biphenyl Compounds
- Cells, Cultured
- Chloramphenicol O-Acetyltransferase/biosynthesis
- Cycloheximide/pharmacology
- Dactinomycin/pharmacology
- Gene Expression Regulation/drug effects
- Gene Expression Regulation/physiology
- Heart/drug effects
- Heart Ventricles
- Imidazoles/pharmacology
- Liver/metabolism
- Lung/metabolism
- Myocardium/cytology
- Myocardium/metabolism
- Promoter Regions, Genetic
- Pyridines/pharmacology
- RNA, Messenger/biosynthesis
- RNA, Ribosomal, 18S/biosynthesis
- Rats
- Rats, Sprague-Dawley
- Receptors, Angiotensin/agonists
- Recombinant Fusion Proteins
- Stress, Mechanical
- Tetrazoles/pharmacology
- Transcription, Genetic/drug effects
- Transfection
- beta-Galactosidase/biosynthesis
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Affiliation(s)
- K Tamura
- Department of Internal Medicine II, Yokohama City University School of Medicine, Yokohama 236, Japan
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47
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Kihara M, Umemura S, Sugaya T, Toya Y, Yabana M, Kobayashi S, Tamura K, Kadota T, Kishida R, Murakami K, Fukamizu A, Ishii M. Expression of neuronal type nitric oxide synthase and renin in the juxtaglomerular apparatus of angiotensin type-1a receptor gene-knockout mice. Kidney Int 1998; 53:1585-93. [PMID: 9607188 DOI: 10.1046/j.1523-1755.1998.00904.x] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.5] [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: 11/20/2022]
Abstract
Angiotensin type-1a (AT1a) receptor gene-knockout (AT1a-/-) mice exhibit chronic hypotension and renin overproduction. In the kidneys of AT1a-/- mice, the activity of neuronal type nitric oxide synthase (N-NOS) was histochemically detected by nicotinamide adenine dinucleotide phosphate (NADPH) diaphorase (NADPHd) reaction combined with N-NOS immunohistochemistry. The localization of renin was detected by immunohistochemistry and the results were analyzed morphometrically. The levels of N-NOS and renin mRNA in the renal cortical tissue were determined by reverse transcription-PCR and Northern blot analysis, respectively. In the renal sections from wild-type mice, NADPHd activity and N-NOS immunoreactivity were localized to the discrete region of the macula densa in contact with the parent glomerulus. In contrast, N-NOS-positive macula densa cells were distributed beyond the original location of the macula densa, occasionally extending to the opposite side of the distal tubules. The mean number of N-NOS positive macula densa cells was significantly increased in AT1a-/- mice (186 per 100 glomeruli) compared with wild-type mice (65 per 100 glomeruli). AT1a-/- mice showed 1.4-times higher N-NOS mRNA levels in the renal cortical tissues than wild-type mice. The plasma renin activity was significantly higher in AT1a-/- mice (205.5 +/- 26.1 ng/ml/hr) than in wild-type mice (8.0 +/- 0.2 ng/ml/hr). The renin-positive areas per glomerulus and renal renin gene expression were 12-times and 2.6-times higher in AT1a-/- mice than in wild-type mice, respectively. These abnormalities, however, were less remarkable in AT1a-/- mice compared with angiotensinogen-knockout mice. When AT1a-/- mice were fed a high-salt diet, the signal intensity of the NADPHd reaction and the number of positively-stained macula densa cells were significantly decreased. The levels of renal cortical N-NOS mRNA were also suppressed by the treatment. Dietary salt loading produced a parallel decrease in plasma renin activity, renal renin-immunoreactive areas, and the levels of renin mRNA without affecting systemic blood pressure. These results provide evidence for the possible involvement of N-NOS at the macula densa in the increased renin production in AT1a-/- mice.
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Affiliation(s)
- M Kihara
- Department of Internal Medicine II, Yokohama City University, Japan
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48
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Abstract
Caveolae and their principal component caveolin have been implicated in playing a major role in G protein-mediated transmembrane signaling. We examined whether caveolin interacts with adenylyl cyclase, an effector of G protein signaling, using a 20-mer peptide derived from the N-terminus scaffolding domain of caveolin-1. When tissue adenylyl cyclases were examined, cardiac adenylyl cyclase was inhibited more potently than other tissue adenylyl cyclases. The caveolin-1 peptide inhibited type V, as well as type III adenylyl cyclase, overexpressed in insect cells, whereas the same peptide had no effect on type II. The caveolin-3 scaffolding domain peptide similarly inhibited type V adenylyl cyclase. In contrast, peptides derived from the caveolin-2 scaffolding domain and a caveolin-1 nonscaffolding domain had no effect. Kinetic studies showed that the caveolin-1 peptide decreased the maximal rate (Vmax) value of type V without changing the Michaelis constant (Km) value for the substrate ATP. Studies with various truncations and point mutations of this peptide revealed that a minimum of 16 amino acid residues and intact aromatic residues are important for the inhibitory effect. The potency of inhibition was greater when adenylyl cyclase was in stimulated condition vs. basal condition. Thus, caveolin may be another cellular component that regulates adenylyl cyclase catalytic activity. Our results also suggest that the caveolin peptide may be used as an isoform-selective inhibitor of adenylyl cyclase.
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Affiliation(s)
- Y Toya
- Cardiovascular and Pulmonary Research Institute, Allegheny University of the Health Sciences, Pittsburgh, Pennsylvania 15212, USA
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49
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Abstract
The current study was undertaken to examine whether we can target adenylyl cyclase to regulate beta-adrenergic signaling with increased cardiac selectivity. Forskolin, a natural diterpene compound, interacts directly with adenylyl cyclase. We studied the adenylyl cyclase isoform-selectivity of forskolin derivatives using insect cell membranes overexpressing type II, III, and V adenylyl cyclase isoforms. 6-[3-(dimethylamino) propionyl] forskolin (NKH477) stimulated type V more potently (1.87 +/- 0.02-fold) than type II (1.04 +/- 0.02-fold) and type III (0.89 +/- 0.03-fold) relative to forskolin (50 microM, P < 0.05). Similarly, 6-[3-(dimethylamino)propionyl]-14,15-dihydro-forskolin (DMAPD) stimulated type V (1.39 +/- 0.02-fold) more potently than types II (0.66 +/- 0.02-fold) and type III (0.31 +/- 0.02-fold) relative to forskolin (P < 0.05). This selectivity was maintained under different assay conditions--i.e. with different forskolin (0.1-100 microM) and Mg (1-10 mM) concentrations, with or without Gs alpha. NKH477 increased cAMP accumulation in HEK293 cells stably overexpressing type V more than forskolin (1.57 +/- 0.13-fold) (P < 0.05). Examination of multiple tissue homogenates revealed that DMAPD and NKH477 stimulated cardiac adenylyl cyclase more potently than the other tissue adenylyl cyclases (lung, brain, and kidney) relative to forskolin. Our results suggest that a particular side-chain modification of forskolin enhanced the selectivity for the cardiac isoform stimulation. Adenylyl cyclase isoforms may be targeted to increase tissue selectivity in future drug therapy for beta-adrenergic regulation.
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Affiliation(s)
- Y Toya
- Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
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50
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Oka N, Asai K, Kudej RK, Edwards JG, Toya Y, Schwencke C, Vatner DE, Vatner SF, Ishikawa Y. Downregulation of caveolin by chronic beta-adrenergic receptor stimulation in mice. Am J Physiol 1997; 273:C1957-62. [PMID: 9435501 DOI: 10.1152/ajpcell.1997.273.6.c1957] [Citation(s) in RCA: 84] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Caveolae, flask-shaped invaginations of cell membranes, are believed to play pivotal roles in transmembrane transportation of molecules and cellular signaling. Caveolin, a structural component of caveolae, interacts directly with G proteins and regulates their function. We investigated the effect of chronic beta-adrenergic receptor stimulation on the expression of caveolin subtypes in mouse hearts by immunoblotting and Northern blotting. Caveolin-1 and -3 were abundantly expressed in the heart and skeletal muscles, but not in the brain. Continuous (-)-isoproterenol, but not (+)-isoproterenol, infusion via osmotic minipump (30 micrograms.g-1.day-1) for 13 days significantly downregulated both caveolin subtypes in the heart. The expression of caveolin-1 was reduced by 48 +/- 6.1% and that of caveolin-3 by 28 +/- 4.0% (P < 0.01, n = 8 for each). The subcellular distribution of caveolin subtypes in ventricular myocardium was not altered as determined by sucrose gradient fractionation. In contrast, the expression of both caveolin subtypes in skeletal muscles was not significantly changed. Our data suggest that the expression of caveolin subtypes is regulated by beta-adrenergic receptor stimulation in the heart.
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Affiliation(s)
- N Oka
- Department of Medicine, Harvard Medical School, Boston, Massachusetts 02115, USA
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