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Teshima K, Nara M, Watanabe A, Ito M, Ikeda S, Hatano Y, Oshima K, Seto M, Sawada K, Tagawa H. Dysregulation of BMI1 and microRNA-16 collaborate to enhance an anti-apoptotic potential in the side population of refractory mantle cell lymphoma. Oncogene 2013; 33:2191-203. [PMID: 23686310 DOI: 10.1038/onc.2013.177] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2012] [Revised: 03/23/2013] [Accepted: 03/25/2013] [Indexed: 12/29/2022]
Abstract
The proto-oncogene BMI1 and its product, Bmi1, is overexpressed in various types of tumors, particularly in aggressive tumors and tumors resistant to conventional chemotherapy. BMI1/Bmi1 is also crucially involved in cancer-initiating cell maintenance, and is recurrently upregulated in mantle cell lymphoma (MCL), especially aggressive variants. Recently, side population (SP) cells were shown to exhibit tumor-initiating characteristics in various types of tumors. In this study, we show that recurrent MCL cases significantly exhibit upregulation of BMI1/Bmi1. We further demonstrate that clonogenic MCL SP shows such tumor-initiating characteristics as high tumorigenicity and self-renewal capability, and that BMI1 was upregulated in the SP from recurrent MCL cases and MCL cell lines. On screening for upstream regulators of BMI1, we found that expression of microRNA-16 (miR-16) was downregulated in MCL SP cells by regulating Bmi1 in the SPs, leading to reductions in tumor size following lymphoma xenografts. Moreover, to investigate downstream targets of BMI1 in MCL, we performed cross-linking/chromatin immunoprecipitation assay against MCL cell lines and demonstrated that Bmi1 directly regulated pro-apoptotic genes such as BCL2L11/Bim and PMAIP1/Noxa, leading to enhance anti-apoptotic potential of MCL. Finally, we found that a proteasome inhibitor bortezomib, which has been recently used for relapsed MCL, effectively induced apoptosis among MCL cells while reducing expression of Bmi1 and increasing miR-16 in MCL SP. These results suggest that upregulation of BMI1 and downregulation of miR-16 in MCL SP has a key role in the disease's progression by reducing MCL cell apoptosis. Our results provide important new insight into the pathogenesis of MCL and strongly suggest that targeting BMI1/Bmi1 might be an effective approach to treating MCL, particularly refractory and recurrent cases.
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Oshima K, Kanda Y, Kako S, Ohno K, Kishino S, Kurokawa M. Pharmacokinetics of micafungin in patients undergoing allogeneic hematopoietic stem cell transplantation. Transpl Infect Dis 2013; 15:323-7. [DOI: 10.1111/tid.12070] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2012] [Revised: 11/23/2012] [Accepted: 11/23/2012] [Indexed: 11/30/2022]
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Doki N, Miyawaki S, Tanaka M, Kudo D, Wake A, Oshima K, Fujita H, Uehara T, Hyo R, Mori T, Takahashi S, Okamoto S, Sakamaki H. Visceral varicella zoster virus infection after allogeneic stem cell transplantation. Transpl Infect Dis 2013; 15:314-8. [DOI: 10.1111/tid.12073] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2012] [Revised: 10/02/2012] [Accepted: 11/24/2012] [Indexed: 01/08/2023]
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Hagiwara S, Murata M, Aoki M, Kaneko M, Oshima K. Septic shock caused by Klebsiella oxytoca: An autopsy case and a survival case with driving Extracorporeal Membrane Oxygenation. Hippokratia 2013; 17:171-173. [PMID: 24376326 PMCID: PMC3743625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We report two cases of Klebsiella oxytoca bacteremia. Case 1 was a 56-year-old man who was transferred to our hospital by ambulance due to diarrhea and general fatigue. On arrival, he was clearly conscious. However he was in septic shock. We injected broad spectrum antibacterial agents and started intensive care. Though intensive care included continuous hemodiafiltration (CHDF), he died 22 hours after admission. Case 2 was a 69-year-old man with a history of gastrectomy for gastric cancer. He had been admitted to a previous hospital due to ileus. His ileus tube was removed on the eighth day, and he then developed a fever of 38 ºC on the following day. He went into shock and became unconscious; he was therefore transferred to our hospital. We diagnosed septic shock and disseminated intravascular coagulation (DIC). We injected broad spectrum antibacterial agents, and recombinant thrombomodulin alpha (rTM). Although he was started in intensive care, his hemodynamics were unstable on the day following admission. Extracorporeal membrane oxygenation (ECMO) and intra-aortic balloon pumping (IABP) were started to maintain his hemodynamics. His condition gradually improved, and he was transferred to the previous hospital for rehabilitation on the 28(th) day. ECMO for septic shock in adults is unusual; however ECMO can be introduced even in patients with severe sepsis under careful monitoring. The new anti-DIC agent rTM is useful for safe driving of ECMO in patients with DIC.
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Matsubara T, Akiyama Y, Oshima K, Okajima T, Nadano D, Matsuda T. Dephosphorylation reduces passage of ovalbumin antigen through intestinal epithelial Caco-2 cell monolayers. J Biochem 2013; 153:347-54. [DOI: 10.1093/jb/mvs154] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Okazaki T, Miyaji H, Kiuchi K, Motegi E, Kosaka N, Oshima K, Watanabe H, Fukasawa I, Inaba N. W130 THE ASSOCIATION BETWEEN BACTERIAL VAGINOSIS WITH MYCOPLASMAS DURING PREGNANCY AND PRETERM DELIVERY RATE. Int J Gynaecol Obstet 2012. [DOI: 10.1016/s0020-7292(12)61855-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Inaba N, Hayshida S, Shu-Kang X, Oshima K, Inaba M, Inaba F, Okazaki T, Watanabe H, Fukasawa I. W053 AN IMPROVED REGIMEN FOR THE PREVENTION OF HBV MOTHER-TO-CHILD TRANSMISSION - BASED ON THE INTERNATIONAL COOPERATIVE CLINICAL STUDY (ICCS). Int J Gynaecol Obstet 2012. [DOI: 10.1016/s0020-7292(12)61779-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Ashizawa M, Oshima K, Wada H, Ishihara Y, Kawamura K, Sakamoto K, Sato M, Terasako K, Machishima T, Kimura S, Kikuchi M, Nakasone H, Okuda S, Kako S, Kanda J, Yamazaki R, Tanihara A, Nishida J, Kanda Y. Hyperbilirubinemia in the early phase after allogeneic HSCT: prognostic significance of the alkaline phosphatase/total bilirubin ratio. Bone Marrow Transplant 2012; 48:94-8. [PMID: 22750996 DOI: 10.1038/bmt.2012.130] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Hyperbilirubinemia in the early phase after allogeneic hematopoietic SCT (HSCT) is due to various causes. One of the most important causes of hyperbilirubinemia is veno-occlusive disease/sinusoidal obstructive syndrome (VOD/SOS). However, the prognosis of patients who are clinically diagnosed as SOS varies. We retrospectively evaluated 82 patients who underwent their first allogeneic HSCT. GVHD prophylaxis was a combination of short-term MTX and CsA (n=77) or tacrolimus (n=5). Thirty-three patients developed hyperbilirubinemia, with a bilirubin level of at least 2 mg/dL, within 20 days after HSCT. Of these patients, 24 were diagnosed as VOD/SOS using the modified Seattle criteria. Twenty-six recovered to a bilirubin level of <2 mg/dL. We focused on the serum alkaline phosphatase/total bilirubin ratio (ALP/TB) at the onset of hyperbilirubinemia and found that it significantly predicted the recovery from hyperbilirubinemia. OS was significantly higher in patients with a lower ALP/TB ratio (P=0.00056). In addition, a lower ALP/TB ratio was associated with better survival even in patients who were clinically diagnosed as SOS (P<0.001). The ALP/TB ratio at the onset of hyperbilirubinemia may be a useful predictor for the prognosis of hyperbilirubinemia and SOS early after HSCT.
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Kimura SI, Wada H, Sakamoto K, Ashizawa M, Sato M, Terasako K, Nakasone H, Kikuchi M, Okuda S, Kako S, Yamazaki R, Oshima K, Tanaka Y, Tanihara A, Nishida J, Kanda Y. L-index as a novel index to evaluate both the intensity and duration of lymphopenia after allogeneic hematopoietic stem cell transplantation. Transpl Infect Dis 2012; 14:364-73. [DOI: 10.1111/j.1399-3062.2012.00727.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2011] [Revised: 11/10/2011] [Accepted: 12/08/2011] [Indexed: 01/02/2023]
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Suzuki J, Ashizawa M, Okuda S, Wada H, Sakamoto K, Terasako K, Sato M, Kimura SI, Kikuchi M, Nakasone H, Kako S, Yamazaki R, Oshima K, Nishida J, Kanda Y. Varicella zoster virus meningoencephalitis after allogeneic hematopoietic stem cell transplantation. Transpl Infect Dis 2012; 14:E7-12. [PMID: 22340704 DOI: 10.1111/j.1399-3062.2012.00720.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2011] [Revised: 11/21/2011] [Accepted: 11/26/2011] [Indexed: 12/01/2022]
Abstract
Although the reactivation of varicella zoster virus (VZV) is a common complication after allogeneic hematopoietic stem cell transplantation (HSCT), VZV meningoencephalitis is a rare life-threatening infectious disease after HSCT. We describe here a patient who developed VZV meningoencephalitis 2 years after human leukocyte antigen-matched unrelated HSCT for acute myeloblastic leukemia. She developed chronic graft-versus-host disease, and cyclosporine (CSA) was continued until 17 months after HSCT. Low-dose acyclovir (ACV) at 200 mg/day was administered to prevent the reactivation of VZV from day -7 to the termination of CSA. At 22 months, she suddenly developed fever, loss of consciousness, and seizure, with generalized skin rash. A high level of VZV DNA was detected in her cerebrospinal fluid (CSF). She was diagnosed to have VZV meningoencephalitis. Intravenous ACV at 30 mg/kg/day was given for 2 months. Although loss of consciousness was quickly resolved, some neurologic symptoms persisted. She did not have any known risk factors for VZV reactivation. Therefore, we should keep in mind that any HSCT recipient may develop VZV meningoencephalitis, and examination of CSF for VZV infection with an empiric administration of ACV may be recommended for HSCT recipients with central nervous system symptoms, even in the absence of skin manifestations.
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Minezaki H, Oshima K, Uchida T, Muramatsu M, Asaji T, Kitagawa A, Kato Y, Biri S, Yoshida Y. Low energy Fe+ beam irradiation to C60 thin film. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2012; 83:02A346. [PMID: 22380193 DOI: 10.1063/1.3675456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We have developed an electron cyclotron resonance ion source apparatus, which is designed for the production of endohedral fullerene. In this study, we irradiated the Fe(+) beam to the C(60) thin film. We changed the experimental condition of the dose and the ion energy. We could observe the Fe + C(60) peak by analysis of the time-of-flight mass spectrometry. The highest intensity of the Fe + C(60) peak was observed at the ion energy of 200 eV. The Fe + C(60) peak intensity tended to become high in the case of long irradiation time and large dose.
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Oshima K, Taniguchi S, Fukuda T, Kakihana K, Eto T, Ikegame K, Morishima Y, Nagamura T, Sakamaki H, Atsuta Y, Murata M. The Effect of Sex Mismatch on Outcome in Allogeneic Hematopoietic Stem Cell Transplantation. Biol Blood Marrow Transplant 2012. [DOI: 10.1016/j.bbmt.2011.12.350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Asaji T, Uchida T, Minezaki H, Oshima K, Racz R, Muramatsu M, Biri S, Kitagawa A, Kato Y, Yoshida Y. Effect of pulse-modulated microwaves on fullerene ion production with electron cyclotron resonance ion source. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2012; 83:02A303. [PMID: 22380150 DOI: 10.1063/1.3656428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Fullerene plasmas generated by pulse-modulated microwaves have been investigated under typical conditions at the Bio-Nano electron cyclotron resonance ion source. The effect of the pulse modulation is distinct from that of simply structured gases, and then the density of the fullerene plasmas increased as decreasing the duty ratio. The density for a pulse width of 10 μs at the period of 100 μs is 1.34 times higher than that for CW mode. We have studied the responses of fullerene and argon plasmas to pulsed microwaves. After the turnoff of microwave power, fullerene plasmas lasted ∼30 times longer than argon plasmas.
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Uchida T, Minezaki H, Oshima K, Racz R, Muramatsu M, Asaji T, Kitagawa A, Kato Y, Biri S, Yoshida Y. Study on the beam transport from the Bio-Nano ECRIS. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2012; 83:02B713. [PMID: 22380318 DOI: 10.1063/1.3670597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The beam transport of N(+) ion and C(60)(+) ion in the Bio-Nano ECRIS with min-B configuration was investigated based on the ion beam profiles. The N(+) beam could be focused under the low-beam current conditions. Also the C(60)(+) beam could be focused in spite of the large space-charge effect which will lead the divergence of the beam. We confirmed that our beam transport system works well even for the C(60)(+) ion beam. We estimated the highest C(60)(+) beam current with the focused beam profile by comparing the N(+) ion beam.
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Nakasone H, Binh P, Yamazaki R, Tanaka Y, Sakamoto K, Ashizawa M, Sato M, Terasako K, Kimura SI, Kikuchi M, Kako S, Okuda S, Oshima K, Tanihara A, Nishida J, Abe Y, Kanda Y. Association Between Serum High-Molecular-Weight Adiponectin Level and the Severity of Chronic Graft-Versus-Host Disease in Allogeneic Stem Cell Transplantation Recipients. Biol Blood Marrow Transplant 2011. [DOI: 10.1016/j.bbmt.2010.12.554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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41
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Wada H, Terasako K, Kamiya Y, Sato M, Kimura SI, Okuda S, Kako S, Yamazaki R, Oshima K, Nishida J, Moriguchi M, Terai C, Kanda Y. Immune recovery after autologous PBSC transplantation without in vitro graft manipulation for refractory systemic lupus erythematosus. Bone Marrow Transplant 2011; 46:1450-4. [PMID: 21243022 DOI: 10.1038/bmt.2010.332] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Autologous hematopoietic SCT (ASCT) has been investigated as salvage therapy for refractory systemic lupus erythematosus (SLE). Although immune recovery after ASCT with in vitro purging of lymphocytes has been extensively studied, little information is available about immune recovery after ASCT without in vitro purging. Therefore, we analyzed the immune recovery of a patient who successfully underwent ASCT without in vitro purging for refractory SLE. In addition to the numbers of PBL subsets, T-cell receptor rearrangement excision circles (TRECs) and the T-cell receptor repertoire diversity of both CD4+ and CD8+ T cells were sequentially analyzed. All SLE-related symptoms disappeared within 3 months after ASCT and the serum anti-dsDNA Ab became undetectable. The number of CD4+CD45RO+ memory T cells remained lower than that in healthy adult controls, but the number of CD4+CD45RA+ naïve T cells showed a rapid increase after ASCT. TRECs of both CD4+ and CD8+ T cells were strongly suppressed before ASCT, but consistently increased after ASCT. The T-cell receptor repertoire of CD8+ T cells was skewed before ASCT, but the diversity recovered after ASCT. ASCT with the reinfusion of a large number of autologous T cells did not impair the recovery of naive T cells or resetting of the immune system.
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Shoda A, Hayashi M, Takayama N, Oshima K, Nishikawa M, Okazaki T, Negishi M, Hayashida S, Watanabe H, Inaba N. Maternal screening and postpartum vaccination for measles infection in Japan: a cohort study. BJOG 2010; 118:88-92. [DOI: 10.1111/j.1471-0528.2010.02764.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Kanda Y, Sakamoto K, Ashizawa M, Sato M, Terasako K, Kikuchi M, Kimura SI, Okuda S, Kako S, Oshima K. Risks and benefits of ovarian shielding in female patients undergoing TBI: a decision analysis. Bone Marrow Transplant 2010; 46:1145-7. [DOI: 10.1038/bmt.2010.240] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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44
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Sasaki Y, Tsujiyama Y, Tanaka H, Yoshida S, Goshima T, Oshima K, Katayama S, Yamada Y. Risk Factors for Campylobacter Colonization in Broiler Flocks in Japan. Zoonoses Public Health 2010; 58:350-6. [DOI: 10.1111/j.1863-2378.2010.01370.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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45
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Oshima K, Takahashi T, Mori T, Matsuyama T, Usuki K, Asano-Mori Y, Nakahara F, Okamoto S, Kurokawa M, Kanda Y. One-year low-dose valacyclovir as prophylaxis for varicella zoster virus disease after allogeneic hematopoietic stem cell transplantation. A prospective study of the Japan Hematology and Oncology Clinical Study Group. Transpl Infect Dis 2010; 12:421-7. [DOI: 10.1111/j.1399-3062.2010.00541.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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46
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Tsuge I, Kondo Y, Nakajima Y, Nakagawa N, Imai K, Nonoyama S, Oshima K, Ohara O, Hatanaka M, Kitano E, Kitamura H, Urisu A. Hyper IgM syndrome and complement Clq deficiency in an individual with systemic lupus erythematosus-like disease. Clin Exp Rheumatol 2010; 28:558-560. [PMID: 20810037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2010] [Accepted: 06/25/2010] [Indexed: 05/29/2023]
Abstract
Many immunedeficiency syndromes are associated with autoimmune disorders. We here report on a girl with a systemic lupus erythematosus-like disease who suffered from both hyperimmunoglobulin M syndrome (HIGMS) and C1q deficiency. Despite severe central nervous system-lupus like disease, probably due to C1q deficiency, kidney function was relatively spared. IgM autoantibody might play a protective role against lupus-glomerulonephritis.
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Aghamohammadi A, Imai K, Moazzami K, Abolhassani H, Tabatabaeiyan M, Parvaneh N, Nasiri Kalmarzi R, Nakagawa N, Oshima K, Ohara O, Nonoyama S, Rezaei N. Ataxia-telangiectasia in a patient presenting with hyper-immunoglobulin M syndrome. J Investig Allergol Clin Immunol 2010; 20:442-445. [PMID: 20945614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023] Open
Abstract
Ataxia-telangiectasia (AT) and hyper-immunoglobulin M (HIGM) syndrome are both primary immunodeficiency diseases caused by different genetic defects. While a small proportion of AT patients have increased serum immunoglobulin (Ig) M concentrations during the course of a disease, a high level of IgM at onset is rare. We report the case of an 8-year-old girl who had experienced recurrent respiratory infection, cutaneous abscesses, and hepatosplenomegaly since the age of 2 years. She was diagnosed with HIGM based on the results of immunological studies, including low IgG and IgA levels and raised serum IgM concentrations. However, at the age of 4 years, a neurological examination revealed gait disturbance and telangiectatic lesions on the conjunctiva; therefore, a diagnosis of AT was suggested. In spite of regular intravenous immunoglobulin infusions and antimicrobial prophylaxis, the patient experienced several episodes of respiratory infection and eventually died of respiratory failure at the age of 8 years. Further molecular analysis revealed a novel homozygous missense mutation in exon 53 (c.8250C>T, p.2622Ala>Val) of the ATM gene. Patients with AT and the HIGM phenotype may not develop clinical characteristics of AT for some time. While patients with AT and increased serum IgM levels could have a considerably more severe disease course and a shorter survival, IgM levels could be considered a prognostic factor.
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Kimura S, Oshima K, Okuda S, Sato K, Sato M, Terasako K, Nakasone H, Kako S, Yamazaki R, Tanaka Y, Tanihara A, Higuchi T, Nishida J, Kanda Y. Pharmacokinetics of CsA during the switch from continuous intravenous infusion to oral administration after allogeneic hematopoietic stem cell transplantation. Bone Marrow Transplant 2009; 45:1088-94. [DOI: 10.1038/bmt.2009.316] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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49
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Oshima K, Sato M, Terasako K, Kimura S, Okuda S, Kako S, Kanda Y. Target blood concentrations of CYA and tacrolimus in randomized controlled trials for the prevention of acute GVHD after hematopoietic SCT. Bone Marrow Transplant 2009; 45:781-2. [DOI: 10.1038/bmt.2009.213] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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50
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Kadokawa H, Shibata M, Tanaka Y, Kojima T, Matsumoto K, Oshima K, Yamamoto N. Bovine C-terminal octapeptide of RFamide-related peptide-3 suppresses luteinizing hormone (LH) secretion from the pituitary as well as pulsatile LH secretion in bovines. Domest Anim Endocrinol 2009; 36:219-24. [PMID: 19328642 DOI: 10.1016/j.domaniend.2009.02.001] [Citation(s) in RCA: 113] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2008] [Revised: 02/04/2009] [Accepted: 02/11/2009] [Indexed: 11/15/2022]
Abstract
Gonadotropin-inhibiting hormone (GnIH), observed in quail as a member of the RFamide neuropeptide family, suppresses luteinizing hormone (LH) secretion from the avian pituitary. Rats and cattle have an active gene of another member of the RFamide neuropeptide family, termed RFamide-related peptide-3 (RFRP-3), although bovine RFRP-3 is different from that of rats in both length and amino-acid sequence. A single injection of GnIH or RFRP-3 inhibited LH secretion in rodents, which continued for various periods. This study was conducted to evaluate the effects of bovine C-terminal octapeptide of RFRP-3 (RFRP-3-8) on LH secretion from cultured anterior pituitary (AP) cells of cattle, and the effects of RFRP-3-8 injections on pulsatile LH secretion in castrated male calves. The suppressive effect of RFRP-3-8 on LH secretion from AP cells was observed in the presence of gonadotropin-releasing hormone (GnRH), but not in the absence of GnRH in culture media. In another experiment collecting blood samples serially from castrated male calves with repeated intravenous injections of RFRP-3-8 (n=6) or saline (n=6), the RFRP-3-8 group showed suppressed LH pulse frequency during the injection period (P<0.05); however, the RFRP-3-8 group showed no difference from the saline group in all measures of LH secretion in the postinjection period. In conclusion, our results suggested that RFRP-3-8 suppresses LH secretion from cultured AP cells, as well as LH pulse frequency in cattle.
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