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Taguchi S, Funabiki M, Hayashi T, Tada Y, Iwaki Y, Karita M, Ota T, Maeda K, Matsubara T, Zada P, Sugiyama N, Nakamura Y. The implantation rate of japanese infertile patients with repeated implantation failure can be improved by endometrial receptivity array (era) test: a randomized controlled trial. Fertil Steril 2018. [DOI: 10.1016/j.fertnstert.2018.07.270] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Kitaya K, Tada Y, Hayashi T, Taguchi S, Funabiki M, Iwaki Y, Karita M, Nakamura Y. Diclofenac suppository pretreatment in prevention of vasovagal reflex-associated complications for infertile women undergoing local endometrial injury. CLIN EXP OBSTET GYN 2015. [DOI: 10.12891/ceog1995.2015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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Tada Y, Kitaya K, Hayashi T, Iwaki Y, Karita M, Taguchi S, Funabiki M, Nakamura Y. Transient azoospermia following rosuvastatin medication for hypercholesterolemia. CLIN EXP OBSTET GYN 2015. [DOI: 10.12891/ceog1925.2015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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Taguchi S, Hayashi T, Tada Y, Kitaya K, Funabiki M, Iwaki Y, Karita M, Nakamura Y. Do combined psychological stress examinations predict pregnancy outcome in an assisted reproductive technology program? CLIN EXP OBSTET GYN 2015. [DOI: 10.12891/ceog1890.2015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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Tada Y, Hayashi T, Iwaki Y, Karita M, Taguchi S, Funabiki M, Nakamura Y. Transient azoospermia following rosuvastatin medication for hypercholesterolemia. CLIN EXP OBSTET GYN 2015; 42:545-546. [PMID: 26411232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The authors report a case of transient azoospermia following hydroxymethylglutaryl-coenzyme A reductase (HMGCR) inhibitor rosuvastatin medication for hypercholesterolemia. While a primary infertile couple with oligoasthenospermia was preparing for an in vitro fertilization program, the male partner had been diagnosed with hypercholesterolemia in a medical check-up and prescribed four-week oral administration of rosuvastatin. No motile spermatozoa were found in the ejaculated semen and urine on the day of follicular aspiration. Azoospermia was confirmed by reexamination in weeks 3 and 7. Spermatozoa appeared in the ejaculated semen in two weeks of drug withdrawal. In week 16, the sperm count and motility increased to the level where intracytoplasmic sperm injection was available.
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Kitaya K, Tada Y, Hayashi T, Taguchi S, Funabiki M, Iwaki Y, Karita M, Nakamura Y. Diclofenac suppository pretreatment in prevention of vasovagal reflex-associated complications for infertile women undergoing local endometrial injury. CLIN EXP OBSTET GYN 2015; 42:723-724. [PMID: 26753471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
PURPOSE OF INVESTIGATION To assess the effects of the diclofenac suppository pretreatment in prevention of vasovagal reflex-associated complications for infertile women undergoing local endometrial injury (LEI). MATERIALS AND METHODS Eighty-six infertile outpatients with repeated implantation failure following transfer of morphologically good embryos and/or blastocysts underwent single curettage LEI to improve the pregnancy outcome in the subsequent embryo/blastocyst transfer cycle. Of them, 35 patients chose diclofenac suppository administration prior to LEI, whereas 51 patients did not. The occurrence of palpitations, bradycardia, hypotension, presyncope, and requirement of bed rest was compared between the two groups. RESULTS There were no significant differences in the demographics between the two groups. The prevalence of presyncope and requirement of bed rest was significantly lower in the diclofenac suppository group than in the control group. The pregnancy outcome was similar between the two groups. CONCLUSION The diclofenac suppository administration is a low-cost effective method to reduce the risk of the vasovagal reflex-associated complications in infertile women undergoing LEI.
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Taguchi S, Hayashi T, Tada Y, Kitaya K, Funabiki M, Iwaki Y, Karita M, Nakamura Y. Do combined psychological stress examinations predict pregnancy outcome in an assisted reproductive technology program? CLIN EXP OBSTET GYN 2015; 42:309-310. [PMID: 26151999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
PURPOSE OF INVESTIGATION To investigate prospectively if the pregnancy outcome in infertile women undergoing assisted reproductive technology (ART) is predictable by a combination of psychological stress examinations on the day of embryo/blastocyst transfer. MATERIALS AND METHODS From April 2012 to May 2012, 114 women aged 42 years old or less underwent transfer of morphologically-good embryo/blastocyst(s) in the present in vitro fertilization (IVF) center. Immediately before the transfer, salivary secretion was obtained and frozen. α-amylase and cortisol concentrations were quantified using biochemical assays. In addition, patients were asked to answer General Health Questionnaire 28 (GHQ28) and Zung's Self Rating Depression Scale (SDS) following transfer. The results were compared between the pregnant group and non-pregnant group. RESULTS There were no significant differences in the age of the infertile couples between the pregnant group and non-pregnant group as well as body mass index of the infertile women. The GHQ28 and SDS scores were similar between the two groups, as were the salivary α-amylase and cortisol concentrations. CONCLUSION This prospective study failed to demonstrate the predictivity of the pregnancy outcome by psychological stress examinations in infertile women in an ART program, even though these tests were used in combination.
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Funabiki M, Taguchi S, Hayashi T, Tada Y, Kitaya K, Iwaki Y, Karita M, Nakamura Y. Vaginal preparation with povidone iodine disinfection and saline douching as a safe and effective method in prevention of oocyte pickup-associated pelvic inflammation without spoiling the reproductive outcome: evidence from a large cohort study. CLIN EXP OBSTET GYN 2014. [DOI: 10.12891/ceog18772014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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Funabiki M, Taguchi S, Hayashi T, Tada Y, Kitaya K, Iwaki Y, Karita M, Nakamura Y. Vaginal preparation with povidone iodine disinfection and saline douching as a safe and effective method in prevention of oocyte pickup-associated pelvic inflammation without spoiling the reproductive outcome: evidence from a large cohort study. CLIN EXP OBSTET GYN 2014; 41:689-690. [PMID: 25551964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
PURPOSE OF INVESTIGATION The aim of this study was to investigate if vaginal preparation procedure affects the occurrence of oocyte pickup-associated pelvic inflammation (OPU-PI) and the reproductive outcome in an in vitro fertilization (IVF) program. MATERIALS AND METHODS The occurrence of OPU-PI and the reproductive outcome were compared between 956 infertile patients undergoing vaginal preparation with saline douching alone versus 1,216 infertile patients undergoing a combination ofpovidone iodine disinfection and subsequent saline douching in an IVF program. RESULTS OPU-PI occurred in four patients (0.042%) in the saline douching alone group, whereas there were no cases in the combination group (p = 0.016). There were no significant differences in the rate of fertilization, morphologically good embryo acquisition, clinical and ongoing pregnancy between the two groups (p > 0.23). CONCLUSIONS This large cohort study demonstrated that a combination of vaginal povidone iodine disinfection and subsequent saline douching is more effective procedure than saline douching alone to prevent OPU-PI, without spoiling the oocyte quality.
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Abstract
SUMMARY
The dimensional accuracy of optical bite registration in the CEREC system was compared to that of the conventional physical method in vitro using a bite registration material. Maxillary and mandibular full-arch dentate epoxy models mounted on an articulator were used to measure the interarch distance and the angles created by the occlusal planes. The preparations for a single restoration on the maxillary first molar or for multiple restorations on the maxillary posterior quadrant were made on the model. Optical impression and bite registration data were collected to construct virtual models using computer-aided design software. A silicone material was used for the physical method, and the dimensional accuracy was measured by means of the coordinate measuring machine. The discrepancy relative to the baseline before preparation was analyzed in each registration record. For the single restoration, the optical method created a mean discrepancy of 243.2 μm relative to baseline at the prepared tooth, which was insignificantly but slightly lower than the mean discrepancy of 311.1 μm obtained with the physical method. The mean rotational deviation in the horizontal plane was significantly lower for the optical method. For the multiple preparations, the optical method showed significantly larger discrepancy on the right molar and on the left premolar and molar sites. In the frontal view, the optical method created significantly larger rotational deviation than the physical method. The result indicates that the optical bite registration was effective in terms of dimensional accuracy for single posterior restorations.
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Affiliation(s)
- Y Iwaki
- Yuki Iwaki, DDS, Tokyo Medical and Dental University, Prosthodontics, Tokyo, Japan
| | - N Wakabayashi
- Noriyuki Wakabayashi, DDS, Tokyo Medical and Dental University, Prosthodontics, Tokyo, Japan
| | - Y Igarashi
- Yoshimasa Igarashi, DDS, Tokyo Medical and Dental University, Prosthodontics, Tokyo, Japan
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Nagase T, Katsura Y, Iwaki Y, Nemoto K, Sekine H, Miwa K, Oh-I T, Kou K, Iwaya K, Noritake M, Matsuoka T. The insulin ball. Lancet 2009; 373:184. [PMID: 19135614 DOI: 10.1016/s0140-6736(09)60041-6] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Terumasa Nagase
- Fifth Department of Internal Medicine, Tokyo Medical University, Kasumigaura Hospital, Ami, Ibaraki, Japan
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Ben-Youssef R, Iwaki Y, Baron P, Franco E, Rowsell E, Buckert L, Ojogho O. Successful Living Related Kidney Transplantation Across an Anti-Donor HLA Antibody. Transplant Proc 2006; 38:1280-2. [PMID: 16797281 DOI: 10.1016/j.transproceed.2006.03.021] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2005] [Indexed: 11/19/2022]
Abstract
In preconditioning highly sensitized kidney transplant candidates, renal allograft outcomes have been better when the serum titer for class I anti-HLA donor-specific antibody (DSA) is low in the recipient at the time of transplantation. However, the ideal level to which the titer should be lowered is still controversial. We report a primary living related kidney transplant in a 34-year-old highly sensitized woman (pretransplant panel-reactive antibody=70%) with end-stage renal disease secondary to chronic glomerulonephritis. We sought to desensitize by lowering the DSA titer specifically to 1:4 pretransplant. A standard complement-dependent cytotoxicity cross-match with her donor (sister) was repeatedly negative, although she was positive for class I antibody against her mismatched HLA antigen (A*2402) at a titer up to 1:16 by the single-antigen flowbead assay. The target DSA titer of 1:4 before transplant was achieved by 12 sessions of plasmapheresis (PP) over 7 weeks, plus two intravenous immune globulin infusions (IVIG) (500 mg/kg/infusion). The patient outcome was excellent. Neither IVIG nor PP was needed posttransplant. The serum creatinine ranged between 0.5 mg/dL and 1.2 mg/dL, and no rejection episode was documented at 28 weeks posttransplant. Therefore, we encourage the use of IVIG and PP to lower the DSA titer to at least 1:4 before kidney transplantation in highly sensitized patients. Large prospective trials are needed to establish a consensus for pretransplant risk assignment and to evaluate the need for desensitization.
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Affiliation(s)
- R Ben-Youssef
- Loma Linda University Medical Center, Transplantation Institute, Department of Pathology and Histocompatibility Laboratory, Loma Linda, California 92354, USA
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Katsura Y, Okano T, Matsuno K, Osako M, Kure M, Watanabe T, Iwaki Y, Noritake M, Kosano H, Nishigori H, Matsuoka T. Erythropoietin is highly elevated in vitreous fluid of patients with proliferative diabetic retinopathy. Diabetes Care 2005; 28:2252-4. [PMID: 16123502 DOI: 10.2337/diacare.28.9.2252] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Yoshiya Katsura
- Fifth Department of Internal Medicine, Tokyo Medical University, 3-20-1 Chuou Ami, Inashiki, Ibaraki, Japan, 300-0395.
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Iwata H, Takemura H, Yamada T, Shirahashi K, Matsumoto S, Yoshikawa S, Umeda Y, Iwaki Y. Average P/F ratio during donor management for finding out the potential donor of lung procurement. Transplant Proc 2005; 37:1845-7. [PMID: 15919483 DOI: 10.1016/j.transproceed.2005.02.091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We investigated the potential donors from cases without lung procurement in spite of considering procurement as the donor. We reviewed 207 cases considered for lung procurement. Donors were divided into 2 groups according to whether or not their lungs were harvested: 50 did and 157 did not. We investigated their age, gender, donor management periods, blood pressure, heart rate, P/F ratio, PCO2, HCO3, positive end-expiratory pressure (PEEP), respiratory rate, abnormal findings in the chest X-ray, blood chemistries, sputum culture, and intravenous administration of steroid. Univariable or multivariable logistic regression analysis was used to predict lung harvesting by various factors. Univariable logistic regression analysis revealed maximum heart rate (HR) and respiratory rate (RR), maximum, minimum, and average P/F ratio, and abnormal findings in the chest X-ray, to be predictors to perform transplant. The maximum HR and RR of the non-harvest group are higher than those of the harvest group. Multivariable logistic regression analysis revealed average P/F ratio only to be a predictor to transplant. We divided the non-harvest group into 2 groups according to whether or not their P/F ratio was >300: 55 did (P/F 300 group) and 102 did not (P/F 299 group). Between P/F 299 group and the harvest group, univariable logistic regression analysis revealed maximum HR, maximum and minimum RR, maximum PEEP, maximum, minimum, and average P/F ratio, and abnormal findings in the chest X-ray to be predictors to transplant. Maximum HR, PEEP, and maximum and minimum RR of the P/F 299 group are higher than those of the harvest group. Maximum, minimum, and average P/F ratio of the P/F 299 group are lower than those of the harvest group. The average PCO2 of P/F 299 group is higher than that of the harvest group. The rate of abnormal findings in the chest X-ray of the P/F 299 group is higher than that of the harvest group. Multivariable logistic regression analysis revealed average P/F ratio only to be a predictor to transplant. There were no predictors between the P/F 300 group and the harvest group in both univariable and multivariable logistic regression analyses. Furthermore, there were no different factors between the P/F 300 group and the harvest group. Our study showed that 35.5% of the non-harvest group had a P/F ratio of >300 and had no difference compared with the harvest group. Our data suggest that potential donors existed in the non-harvest group and increased the number of lung procurement to 27.3% from 13.0% of all donors.
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Affiliation(s)
- H Iwata
- Advanced Surgery, Graduate School of Medicine, Gifu University, Gifu City, Gifu, Japan.
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Abstract
The UNOS donor population was examined from 1999 to 2002, and approximately 25% of the over 23,000 donors were biopsied (Bx). There was a significant trend (P < .001) of older donors, cardiovascular accident, and hypertension in the Bx group versus the non-Bx group. The percent GS was directly correlated (P < .001) to graft survival, delayed graft function, and primary nonfunction. Cox regression showed significant relative risk (RR) for >10% GS, hypertension, donors over the age of 50, and African American recipients. RR in donors with >10% GS could be ameliorated (P < .001) by choosing donors with <5 HLA-A, -B, or -DR mismatches (MM), or recipients who were nonsensitized, and/or first transplant. Risk should be managed in donors by choosing appropriate recipients and high-risk immunosuppresion protocols.
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Affiliation(s)
- J Cicciarelli
- Department of Urology, USC Keck School of Medicine, Los Angeles, California 90089-9078, USA.
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Kure M, Katsura Y, Kosano H, Noritake M, Watanabe T, Iwaki Y, Nishigori H, Matsuoka T. A trial to assess the amount of insulin antibodies in diabetic patients by surface plasmon resonance. Intern Med 2005; 44:100-6. [PMID: 15750268 DOI: 10.2169/internalmedicine.44.100] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
OBJECTIVE To measure the amount and affinity of insulin antibodies, we performed a trial to establish a new method for quantitative and qualitative analysis of these antibodies by using surface plasmon resonance (BIAcore system). METHODS Real-time detection of insulin antibody interaction and kinetic analysis were performed using the BIAcore system. PATIENTS OR MATERIALS Eight diabetic patients with insulin antibodies and whose fasting total immunoreactive insulin levels were more than 100 microU/ml were selected. The patients with and without recurrent hypoglycemia were classified into hypoglycemic episode-positive or hypoglycemic episode-negative groups, respectively. Seven diabetic patients without insulin antibodies were selected as controls. RESULTS In the 8 patients, the concentration of insulin antibodies ranged from 2.91 to 16.3 microg/ml and insulin antibodies were not detected in the control group. The apparent KD (dissociation constant) and kd (the dissociation rate constant) values of the patients were much larger than those seen for the anti-human insulin monoclonal antibody. The KD values were significantly higher in the hypoglycemic episode-positive group than in the hypoglycemic episode-negative group (p<0.05). No significant differences in the concentration, the ka (the association rate constant) and the kd values were noted between the groups. CONCLUSION The data suggests that insulin antibodies of the patients have an apparently lower affinity status in sera as compared with that for the anti-human insulin monoclonal antibody, and dissociate easily from the immune-complex in the sera, especially in cases where there is recurrent hypoglycemia in the patients. Therefore insulin antibody characteristics are one of the causative factors in hypoglycemic episodes.
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Affiliation(s)
- Masahiko Kure
- Fifth Department of Internal Medicine, Tokyo Medical University (Kasumigaura Hospital), 3-20-1 Chuou Ami, Inashiki, Ibaraki 300-0395
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Abstract
A novel custom bead array technology is introduced, and it is applied to multiplexed analysis of highly polymorphic human leukocyte antigen (HLA) genetic loci. Our technology combines the construction of probe libraries on color-encoded microparticles (beads) with semiconductor chip processing to produce custom-designed high-density bead array chips in large quantities. Using this novel assay format, two modes of parallel molecular typing of the HLA complex were implemented, namely direct hybridization, illustrated here for class II HLA-DR, and a novel format of on-chip polymerase-mediated primer elongation, illustrated here for class I HLA-A, HLA-B, and HLA-DR using patient and reference cell-line DNA samples. Hybridization-mediated multiplexed analysis of polymorphism method was validated with 142 samples, resulting in 100% concordance with sequence-specific oligonucleotide typing results and a concomitant average of 40% less allele ambiguity. In addition, elongation and hybridization reactions were combined to identify multiple polymorphisms on the same phase of DNA for allele identification.
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Affiliation(s)
- A X Li
- BioArray Solutions Ltd, Warren, NJ, USA
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Nakamura H, Mizokami Y, Iwaki Y, Shiraishi T, Ohtsubo T, Miura S, Narasaka T, Matsuoka T. Lung cancer with metastases to the stomach and duodenum. report of three cases. Dig Endosc 2003. [DOI: 10.1046/j.1443-1661.2003.00248.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
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Li A, Mao L, Wang S, Seul M, Garcia-Gomez J, Musa S, Cicciarelli J, Iwaki Y. Bead microarray for HLA molecular typing. Hum Immunol 2002. [DOI: 10.1016/s0198-8859(02)00480-9] [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: 11/27/2022]
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Shimamura H, Miura H, Iwaki Y, Kubodera T, Matsuoka T, Yuki N, Koga M. Clinical, electrophysiological, and serological overlap between Miller Fisher syndrome and acute sensory ataxic neuropathy. Acta Neurol Scand 2002; 105:411-3. [PMID: 11982496 DOI: 10.1034/j.1600-0404.2002.01144.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
We report a patient with severe sensory ataxia, areflexia, and ophthalmoplegia with preservation of limb muscle strength. Electrophysiological examinations revealed peripheral sensory nerve involvement. A serological examination showed the elevation of IgG antibodies to various b-series gangliosides as well as GT1a. These indicated that this case is an overlap between acute sensory ataxic neuropathy and Miller Fisher syndrome. Autoantibody is implicated as potential pathogenic agents in some cases of acute sensory ataxic neuropathy.
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Affiliation(s)
- H Shimamura
- Fifth Department of Internal Medicine, Tokyo Medical University, Ibaraki, Japan
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Miyazawa Y, Iwaki Y, Yataka M, Tobari I. [Effect of different concentrations of tranilast on posterior capsule opacification]. Nippon Ganka Gakkai Zasshi 2001; 105:442-6. [PMID: 11510107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/16/2023]
Abstract
PURPOSE To evaluate the effect of different concentrations(0.5, 1.0, 2.0%) of tranilast eyedrops in preventing fibrous posterior capsule opacification (PCO) in rabbits. METHODS Experimental phacoemulsification procedures and in-the-bag placement of intraocular lens(IOL) implant were performed. An anterior eye segment analysis system(EAS-1000, Nidek Co, Ltd) was used to evaluate the degree of PCO during 5 weeks after surgery. RESULTS The development of PCO was significantly suppressed in the eyes treated with tranilast eyedrops from 1 week after surgery. The mean PCO density after treatment with 0.5% tranilast was 59.1 +/- 9.3 (mean deviation +/- standard error) and 57.1 +/- 8.2, while for 1.0% tranilast it was 40.1 +/- 6.8 and 46.6 +/- 8.4, and for 2.0% tranilast it was 38.5 +/- 6.0 and 37.5 +/- 5.6 (computer compatible tape, CCT) at 1 week and 5 weeks, respectively. In the control group, the mean PCO density was 89.3 +/- 10.4 and 137.4 +/- 32.8 at 1 week and 5 weeks, respectively(p < 0.05). However, no significant statistical difference was observed in any of the findings for the 3 different tranilast concentrations. CONCLUSION These results suggest that the 0.5% tranilast eyedrops, which are already available on the market, are sufficiently effective for inhibiting PCO.
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Affiliation(s)
- Y Miyazawa
- Second Department of Ophthalmology, Toho University School of Medicine, 2-17-6 Ohhashi, Meguro-ku, Tokyo 153-8515, Japan
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Hayakawa E, Edamoto Y, Xin D, Tran HT, Iwaki Y, Sato Y, Sata T, Abe K. Detection of TT virus DNA in human bile juice. Jpn J Infect Dis 2001; 54:127-8. [PMID: 11544408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Affiliation(s)
- E Hayakawa
- Department of Pathology, National Institute of Infectious Diseases, Toyama 1-23-1, Shinjuku-ku, Tokyo 162-8640, Japan
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Cicciarelli J, Iwaki Y, Mendez R. The influence of donor age on kidney graft survival in the 1990s. Clin Transpl 2001:335-40. [PMID: 11038652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
Based on analyses of the UNOS Registry data for cadaver kidney transplants performed between 1991-1999 we showed that: 1. 15-40 year old donor kidneys provided the best one-year graft survival rates. When donors were analyzed with recipients, younger (0-10) and older (70-90) donors and recipients (Table 2) had the lowest one-year graft success rates. 2. Chronic loss rate, the constant rate of graft loss between one and 5 years, showed younger donor kidneys had a significantly lower chronic loss rate compared with each older donor category. Apparently the younger donor kidneys have a resiliency and nephron reserve that provides better long-term function. However, they may have lower short-term (1-yr) graft survival rates, possibly due to their small size. 3. Black and White donor kidneys had similar one-year graft survival rates; however, in every age group, recipients of White donor kidneys had significantly better 5-year graft survival rates than Black donor kidneys. There was also a noticeably lower chronic loss rate among recipients of White than Black donor kidneys. 4. HLA-matched White donor kidneys had better one- and 5-year graft survival rates and lower chronic loss rates than HLA-mismatched kidneys. The matching effect was lost when the donor age increased beyond age 40. PRA had an effect both at one and 5 years after transplantation. The chronic loss rate was similar with high and low PRA. Therefore, PRA had a relatively short-term effect. 5. Cold ischemia time had a modest effect after 35 hours both at one and 5 years. However, the chronic loss rate was unaffected by CIT, suggesting prolonged ischemia time had a relatively short-term effect. 6. More focused attention on sensitization and lowered CIT can both have a significant effect on short-term graft survival rates. However, both matching and younger donor organs provide the best opportunity for better long-term graft success rates.
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Iwaki Y, Ohtani M. [Poison elimination methods in acute poisoning]. Nihon Geka Gakkai Zasshi 2000; 101:787-90. [PMID: 11215256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
This paper presents current ideas about the application of poison elimination methods in acute poisoning. The methods are divided into two groups: poison elimination before absorption; and enhancement of elimination after drug absorption. The former include washes, emesis, gastric lavage, and administration of activated charcoal and cathartics, while the latter include forced diuresis and extracorporeal toxin elimination such as hemodialysis or hemoperfusion. The indications, contraindications, techniques, and complications, associated with these elimination methods, except for extracorporeal toxin elimination, are discussed. In the treatment of poisoning, early and comprehensive poison elimination is important.
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Affiliation(s)
- Y Iwaki
- Department of Emergency and Critical Care Medicine, Hiroshima University Scgool of Medicine, Hiroshima, Japan
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25
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Abstract
The mouse popliteal lymph node assay (PLNA) has been proposed as an immunotoxicological test to predict allergenic chemicals. However, PLN response is also observed in association with non-specific activation induced by some irritants. We, therefore, examined the kinetics of the PLN cellularity indices of primary and secondary responses. Flow cytometric analysis was used to measure the proportions of T and B cells in PLN. Male ICR mice were subcutaneously injected with TNBS (an allergenic compound) or SDS (an irritant compound) in the left hind footpad, and with vehicle in the right one. On day 28 after first injection, mice were injected with 1/10 or 1/100 dose of the initial injection. On day 7 after first injection of TNBS, primary response reached maximal PLN cellularity index (16.5). On day 2 after second injection, secondary response reached maximal PLN cellularity index (13.1). A marked increase in proportion of B cells was observed in the PLN. On the other hand, after first injection of SDS, primary response reached maximal PLN cellularity index (2.8) on day 10, but neither secondary response nor increase in the B cell proportion were observed. These results suggest that the detection of secondary response and the flow cytometric analysis are useful in differentiating responses to allergenic and irritant compounds in the PLNA.
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Affiliation(s)
- A Suda
- Toxicology Laboratory, Taisho Pharmaceutical Co., Ltd., Saitama, Japan
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Arai Y, Kubo T, Fushiki S, Mazda O, Nakai H, Iwaki Y, Imanishi J, Hirasawa Y. Gene delivery to human chondrocytes by an adeno associated virus vector. J Rheumatol 2000; 27:979-82. [PMID: 10782826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
OBJECTIVE To investigate the efficiency of gene transduction to human chondrocytes using an adeno associated virus (AAV) vector. METHODS We transduced green fluorescent protein (GFP) gene using AAV vector to primary human chondrocytes as well as human cartilage organ cultures, in which chondrocytes are surrounded by extracellular matrix. Expression of GFP gene was analyzed at various time points after transduction by fluorescence microscopy and immunohistochemistry. RESULTS In primary chondrocytes, the percentages of GFP positive cells were 15.9% or 16.0% on Day 1 and 95.0% or 93.7% on Day 7 after gene transduction. In cartilage organ cultures, gene delivery was observed in cells located not only in the superficial layer but also in the deep layer within the cartilage tissue. Up to 45.3+/-7.4% or 46.0+/-3.9% of chondrocytes expressed GFP for at least 28 days. CONCLUSION AAV vector could be useful for direct gene delivery to chondrocytes in situ.
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Affiliation(s)
- Y Arai
- Department of Orthopaedic Surgery, Research Institute for Neurological Diseases and Geriatrics, Kyoto Prefectural University of Medicine, Japan
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27
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Kado S, Miyamoto J, Komatsu N, Iwaki Y, Ozaki H, Taguchi H, Kure M, Sarashina G, Watanabe T, Katsura Y, Nemoto Y, Noritake M, Matsuoka T. Type 1 diabetes mellitus caused by treatment with interferon-beta. Intern Med 2000; 39:146-9. [PMID: 10732833 DOI: 10.2169/internalmedicine.39.146] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
A 57-year-old man was referred to our outpatient clinic after interferon-beta (IFN-beta) treatment for 7 weeks. While IFN-beta therapy was continued in our outpatient clinic, his blood glucose level increased gradually, and he was admitted to our hospital for hyperglycemia. The patient was prescribed a 1,600-kcal diet and intensive insulin therapy was performed. GAD antibody became positive 15 months after the start of IFN therapy, and disappeared 27 months after the start of IFN therapy. Insulin secretion was depleted and the patient had HLA-DR4, B54, and DRB1*0405. This appears to be a case of type 1 diabetes mellitus induced by administration of IFN-beta alone.
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Affiliation(s)
- S Kado
- Department of Internal Medicine 5, Tokyo Medical University, Ami, Ibaragi
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28
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Abstract
PURPOSE To evaluate the effect of tranilast eyedrops in preventing fibrous opacification of the posterior lens capsule after cataract extraction and intraocular lens (IOL) implantation. SETTING The Second Department of Ophthalmology, Toho University School of Medicine, Tokyo, and Shohzankai Medical Foundation, Miyake Eye Hospital, Nagoya, Japan. METHODS This study comprised eyes having continuous curvilinear capsulorhexis and phacoemulsification/aspiration followed by implantation of a posterior chamber IOL in the capsular bag. In this prospective, randomized, controlled, and double-masked trial, tranilast 0.5% (Rizaben) eyedrops (15 eyes) or its placebo eyedrops (20 eyes) were given 4 times a day for 3 months after surgery. An anterior eye segment analysis system (EAS 1000, Nidek Co., Ltd.) was used to evaluate the degree of fibrous posterior capsule opacification (PCO) 1 week and 1 and 3 months after surgery. RESULTS The mean PCO density in the tranilast group was 17.1 cct +/- 4.6 (SD), 20.0 +/- 3.6 cct, and 23.0 +/- 7.7 cct (cct = computer compatible tape) at 1 week and 1 and 3 months, respectively. In the control group, it was 18.2 +/- 5.3, 30.2 +/- 7.8, and 38.4 +/- 8.0 cct, respectively. There was a significant difference in the 1 and 3 month findings between the 2 groups (P < .001). CONCLUSION Tranilast was effective in preventing fibrous PCO at an early postoperative stage. The possible mechanisms of its effect may be prevention of collagen synthesis by minimizing transforming growth factor type beta released during lens epithelial cell metaplasia.
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Affiliation(s)
- I Tobari
- Second Department of Ophthalmology, Toho University School of Medicine, Tokyo, Japan
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Okamoto S, Sakai T, Iwaki Y, Tobari I, Hamano S. Effects of tranilast on cultured rabbit corneal keratocytes and corneal haze after photorefractive keratectomy. Jpn J Ophthalmol 1999; 43:355-62. [PMID: 10580656 DOI: 10.1016/s0021-5155(99)00103-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
PURPOSE In vitro and in vivo studies were performed to elucidate the effects of tranilast on cellular proliferation and collagen synthesis. METHODS Subculturing was carried out using keratocytes from rabbits that underwent photorefractive keratectomy (PRK) and developed corneal haze, and keratocytes from normal rabbit cornea. RESULTS Tranilast suppressed proliferation in cultured keratocytes from the corneal haze region at doses of 30 and 300 micromol/L and collagen synthesis at doses of 3, 30, and 300 micromol/L. Normal corneal cultures showed suppression of keratocyte proliferation and collagen synthesis only at a high dose of tranilast (300 micromol/L). Betamethasone suppressed proliferation of keratocytes in both haze and normal cornea at a dose of 10 micromol/L, as well as collagen synthesis at respective doses of 1 and 10 micromol/L. Diclofenac sodium suppressed collagen synthesis of keratocytes in haze cornea at a high dose of 100 micromol/L, and in keratocytes in normal cornea, at doses of 10 and 100 micromol/L. In an in vivo study, either 0.5% tranilast, 0.1% betamethasone phosphate eye drops, or a tranilast base solution (control) was instilled four times daily to rabbits that had undergone PRK. Weekly evaluation of the inhibitory effect of these drugs on the development of haze was performed 2 weeks after surgery. Tranilast suppressed haze 6-13 weeks after PRK, but betamethasone phosphate showed no effect. CONCLUSION These results indicate that tranilast is potentially effective for inhibiting the corneal haze that occurs after PRK.
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Affiliation(s)
- S Okamoto
- Second Department of Ophthalmology, Toho University School of Medicine, Tokyo, Japan
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30
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Takaya S, Jain A, Yagihashi A, Nakamura K, Kobayashi M, Takeuchi K, Suzuki S, Iwaki Y, Demetris AJ, Todo S, Fung JJ, Starzl TE. Increased bile duct complications and/or chronic rejection in crossmatch positive human liver allografts. Transplant Proc 1999; 31:2028-31. [PMID: 10455963 PMCID: PMC2980294 DOI: 10.1016/s0041-1345(99)00256-0] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- S Takaya
- Pittsburgh Transplant Institute, Pennsylvania, USA
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31
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Abstract
Recombinant adeno-associated virus (rAAV) vectors allow for sustained expression of transgene products from mouse liver following a single portal vein administration. Here a rAAV vector expressing human coagulation factor F.IX (hF.IX), AAV-EF1alpha-F.IX (hF.IX expression was controlled by the human elongation factor 1alpha [EF1alpha] enhancer-promoter) was injected into mice via the portal vein or tail vein, or directly into the liver parenchyma, and the forms of rAAV vector DNA extracted from the liver were analyzed. Southern blot analyses suggested that rAAV vector integrated into the host genome, forming mainly head-to-tail concatemers with occasional deletions of the inverted terminal repeats (ITRs) and their flanking sequences. To further confirm vector integration, we developed a shuttle vector system and isolated and sequenced rAAV vector-cellular DNA junctions from transduced mouse livers. Analysis of 18 junctions revealed various rearrangements, including ITR deletions and amplifications of the vector and cellular DNA sequences. The breakpoints of the vector were mostly located within the ITRs, and cellular DNA sequences were recombined with the vector genome in a nonhomologous manner. Two rAAV-targeted DNA sequences were identified as the mouse rRNA gene and the alpha1 collagen gene. These observations serve as direct evidence of rAAV integration into the host genome of mouse liver and allow us to begin to elucidate the mechanisms involved in rAAV integration into tissues in vivo.
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Affiliation(s)
- H Nakai
- Avigen Inc., Alameda, California 94502, USA.
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32
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Shinkai K, Nakamura K, Tsutsui N, Kuninishi Y, Iwaki Y, Nishida H, Suzuki R, Vohr HW, Takahashi M, Takahashi K, Kamimura Y, Maki E. Mouse popliteal lymph node assay for assessment of allergic and autoimmunity-inducing potentials of low-molecular-weight drugs. J Toxicol Sci 1999; 24:95-102. [PMID: 10349611 DOI: 10.2131/jts.24.95] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
In the present collaborative study, popliteal lymph node (PLN) responses to penicillin G (an allergenic chemical), D-penicillamine (an autoimmunity-inducing chemical), and barbital (a negative reference chemical) were investigated in three different mouse strains by ten pharmaceutical companies. Two inbred mouse strains (BALB/c and A/J) and one outbred strain (ICR) were subcutaneously injected with saline solutions containing penicillin G (1.25, 2.5 and 5 mg/mouse), D-penicillamine (0.5, 1 and 2 mg/mouse), or barbital (2 mg/mouse) into one hind footpad and saline only was injected into the contralateral footpad. PLN cellularity indices were determined on day 7. In the three strains tested, the penicillin G and D-penicillamine injections resulted in approximately dose-dependent responses. In contrast, barbital failed to generate a significant PLN reaction. In the typical data from one of the participating laboratories, the PLN responses of A/J, BALB/c, and ICR to penicillin G were high, intermediate and low, respectively, while their PLN responses to D-penicillamine were all high. Some variation in PLN cellularity indices was observed among the participating laboratories, but reproducibility of the popliteal lymph node assay (PLNA) evaluation was partly confirmed. Although the appropriate selection of mouse strains and drug dosage levels has to be considered, these results suggest that the PLNA may be an appropriate screening system for prediction of the allergic or autoimmunity-inducing potentials of low-molecular-weight drugs.
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Affiliation(s)
- K Shinkai
- Japan Pharmaceutical Manufacturers Association, Tokyo, Japan
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Cicciarelli J, Avila D, Iwaki Y, Sather H, Mendez R. High performance liquid chromatography cyclosporine monitoring: a predictor of renal graft outcome. Transplant Proc 1998; 30:1683-4. [PMID: 9723243 DOI: 10.1016/s0041-1345(98)00392-3] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- J Cicciarelli
- University of Southern California School of Medicine, USC/Metic Transplant Laboratory, Los Angeles 90057, USA
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Matsushita T, Elliger S, Elliger C, Podsakoff G, Villarreal L, Kurtzman GJ, Iwaki Y, Colosi P. Adeno-associated virus vectors can be efficiently produced without helper virus. Gene Ther 1998; 5:938-45. [PMID: 9813665 DOI: 10.1038/sj.gt.3300680] [Citation(s) in RCA: 382] [Impact Index Per Article: 14.7] [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: 01/02/2023]
Abstract
The purpose of this work was to develop an efficient method for the production of adeno-associated virus (AAV) vectors in the absence of helper virus. The adenovirus regions that mediate AAV vector replication were identified and assembled into a helper plasmid. These included the VA, E2A and E4 regions. When this helper plasmid was cotransfected into 293 cells, along with plasmids encoding the AAV vector, and rep and cap genes, AAV vector was produced as efficiently as when using adenovirus infection as a source of help. CMV-driven constructs expressing the E4orf6 and the 72-M(r), E2A proteins were able to functionally replace the E4 and E2A regions, respectively. Therefore the minimum set of genes required to produce AAV helper activity equivalent to that provided by adenovirus infection consists of, or is a subset of, the following genes: the E4orf6 gene, the 72-M(r), E2A protein gene, the VA RNA genes and the E1 region. AAV vector preparations made with adenovirus and by the helper virus-free method were essentially indistinguishable with respect to particle density, particle to infectivity ratio, capsimer ratio and efficiency of muscle transduction in vivo. Only AAV vector preparations made by the helper virus-free method were not reactive with anti-adenovirus sera.
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Nakai H, Herzog RW, Hagstrom JN, Walter J, Kung SH, Yang EY, Tai SJ, Iwaki Y, Kurtzman GJ, Fisher KJ, Colosi P, Couto LB, High KA. Adeno-associated viral vector-mediated gene transfer of human blood coagulation factor IX into mouse liver. Blood 1998; 91:4600-7. [PMID: 9616156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Recombinant adeno-associated virus vectors (AAV) were prepared in high titer (10(12) to 10(13) particles/mL) for the expression of human factor IX after in vivo transduction of murine hepatocytes. Injection of AAV-CMV-F.IX (expression from the human cytomegalovirus IE enhancer/promoter) into the portal vein of adult mice resulted in no detectable human factor IX in plasma, but in mice injected intravenously as newborns with the same vector, expression was initially 55 to 110 ng/mL. The expression in the liver was mostly transient, and plasma levels decreased to undetectable levels within 5 weeks. However, long-term expression of human F.IX was detected by immunofluorescence staining in 0.25% of hepatocytes 8 to 10 months postinjection. The loss of expression was likely caused by suppression of the CMV promoter, because polymerase chain reaction data showed no substantial loss of vector DNA in mouse liver. A second vector in which F.IX expression was controlled by the human EF1alpha promoter was constructed and injected into the portal vein of adult C57BL/6 mice at a dose of 6.3 x 10(10) particles. This resulted in therapeutic plasma levels (200 to 320 ng/mL) for a period of at least 6 months, whereas no human F.IX was detected in plasma of mice injected with AAV-CMV-F.IX. Doses of AAV-EF1alpha-F. IX of 2.7 x 10(11) particles resulted in plasma levels of 700 to 3, 200 ng/mL. Liver-derived expression of human F.IX from the AAV-EF1alpha-F.IX vector was confirmed by immunofluorescence staining. We conclude that recombinant AAV can efficiently transduce hepatocytes and direct stable expression of an F.IX transgene in mouse liver, but sustained expression is critically dependent on the choice of promoter.
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Affiliation(s)
- H Nakai
- Avigen, Inc, Alameda, CA, USA
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36
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Iwata H, Wada Y, Walsh M, Montgomery JA, Hirose H, Mendez R, Cicciarelli J, Iwaki Y. In vitro study of BCX-34: a new human T-lymphocyte-specific purine phosphorylase inhibitor. Transplant Proc 1998; 30:983-6. [PMID: 9636397 DOI: 10.1016/s0041-1345(98)00119-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- H Iwata
- Department of Urology, Metic Transplantation Laboratories, University of Southern California School of Medicine, Los Angeles 90057, USA
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Sakai T, Okamoto S, Iwaki Y. [The effect of tranilast on subepithelial corneal opacity after excimer laser keratectomy]. Nippon Ganka Gakkai Zasshi 1997; 101:783-787. [PMID: 9369059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Recent studies have reported that tranilast inhibited in vitro the proliferation of keratocytes from corneal subepithelial opacities (haze) and collagen synthesis in cultured corneas after excimer laser photorefractive keratectomy (PRK). In this study 0.5% tranilast eye drops, 0.1% betametazone phosphate eyedrops, and a 0.5% tranilast base solution (control) were administered four times daily to rabbits which had undergone PRK. Weekly evaluation of the inhibitory effect of these drugs on haze began two weeks after surgery according to Fantes' classification. 0.5% tranilast suppressed haze from six weeks to thirteen weeks after PRK (p < 0.05). 0.1% betametazone phosphate showed no effect. These results suggested that 0.5% tranilast had a satisfactory therapeutic effect on haze after PRK.
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Affiliation(s)
- T Sakai
- Second Department of Ophthalmology, Toho University School of Medicine, Tokyo, Japan
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38
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Okamura N, Iwaki Y, Hiramoto S, Tamba M, Bannai S, Sugita Y, Syntin P, Dacheux F, Dacheux JL. Molecular cloning and characterization of the epididymis-specific glutathione peroxidase-like protein secreted in the porcine epididymal fluid. Biochim Biophys Acta 1997; 1336:99-109. [PMID: 9271255 DOI: 10.1016/s0304-4165(97)00016-0] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The epididymis-specific glutathione peroxidase was purified from the porcine cauda epididymal fluid in order to analyze its enzymatic activity and roles in the epididymis. The purified protein was found to consist of four identical 23 kDa subunits. The complementary DNA encoding the 23 kDa subunit was cloned from the cDNA library of the porcine proximal caput epididymis, only where the 23 kDa subunit is expressed. Although the selenocysteine codon (TGA) is contained in the cDNA of the other cytosolic type of glutathione peroxidases, it is replaced by cysteine codon (TGT) in the 23 kDa subunit cDNA, similarly to the results previously obtained for cDNAs encoding the epididymis-specific form of the secreted glutathione peroxidases of mouse, rat and monkey. By the direct analysis of the selenium, the purified protein was proved to contain no selenium atom in the molecule. The activities of the purified epididymis-specific glutathione peroxidase toward hydrogen peroxide or organic hydroperoxides were by far lower than the activity of cytosolic selenium-dependent glutathione peroxidase (less than 0.1%). In addition, the concentration of glutathione in the porcine epididymal fluids was about 20 microM, which is much lower than the optimal concentration for the glutathione peroxidase activity of the purified protein. These results strongly suggest that this protein is enzymatically quiescent at least in the porcine epididymal fluid. An immunocytochemical study showed that this protein was found to bind to the acrosomal region of the epididymal sperm and to disappear during the acrosome reaction. Furthermore, this protein significantly retarded the acrosome reaction induced in vitro. The possibilities have been discussed that it protects sperm from the premature acrosome reaction and maintains sperm fertilizing ability in the epididymis.
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Affiliation(s)
- N Okamura
- Institute of Basic Medical Sciences, University of Tsukuba, Ibaraki, Japan.
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39
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Noguchi N, Iwaki Y, Takahashi M, Komuro E, Kato Y, Tamura K, Cynshi O, Kodama T, Niki E. 2,3-Dihydro-5-hydroxy-2,2-dipentyl-4,6-di-tert-butylbenzofuran: design and evaluation as a novel radical-scavenging antioxidant against lipid peroxidation. Arch Biochem Biophys 1997; 342:236-43. [PMID: 9186484 DOI: 10.1006/abbi.1997.9994] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
To develop a novel potent radical-scavenging antioxidant, the ideal structure of a phenolic compound was designed considering the factors that determine antioxidant potency. 2,3-Dihydro-5-hydroxy-2,2-dipentyl-4, 6-di-tert-butylbenzofuran (BO-653) was thus synthesized and its antioxidant activity was evaluated against lipid peroxidations in vitro. The electron spin resonance study showed that the phenoxyl radical derived from BO-653 was more stable than alpha-tocopheroxyl radical. BO-653 reduced alpha-tocopheroxyl radical rapidly, but alpha-tocopherol did not reduce the phenoxyl radical derived from BO-653. However, the chemical reactivity of BO-653 toward peroxyl radical was smaller than that of alpha-tocopherol. This was interpreted as the steric effect of bulky tert-butyl groups at both ortho positions which hindered the access of peroxyl radical to the phenolic hydrogen. However, the tertbutyl substituents increased the stability of BO-653 radical and also lipophilicity, and its antioxidant potency against lipid peroxidation in phosphatidylcholine liposomal membranes was superior to that of alpha-tocopherol. Ascorbic acid reduced the phenoxyl radical derived from BO-653 and spared BO-653 during the oxidation of lipid in the homogeneous solution. On the other hand, ascorbic acid did not spare BO-653 in the oxidation of liposomal membranes. It was concluded that BO-653 is a potent novel radical-scavenging antioxidant.
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Affiliation(s)
- N Noguchi
- Research Center for Advanced Science and Technology, University of Tokyo, Japan
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40
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Iwata H, Barr ML, Cicciarelli JC, Iwaki Y, Schenkel FA, Fein H, Chan KM, Barbers RG, Starnes VA, Marboe CC. Living donor lobar lung transplants and HLA matching: a preliminary report. Transplant Proc 1997; 29:1418-9. [PMID: 9123362 DOI: 10.1016/s0041-1345(96)00617-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- H Iwata
- University of Southern California School of Medicine, Department of Surgery, Los Angeles, USA
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41
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Oonishi H, Iwaki Y, Kin N, Kushitani S, Murata N, Wakitani S, Imoto K. Hydroxyapatite in revision of total hip replacements with massive acetabular defects: 4- to 10-year clinical results. J Bone Joint Surg Br 1997; 79:87-92. [PMID: 9020452 DOI: 10.1302/0301-620x.79b1.1290] [Citation(s) in RCA: 52] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Hydroxyapatite (HA) granules of 100 to 300 microm, 0.9 to 1.2 mm and 3.0 to 5.0 mm were mixed in a ratio of 10:45:45 and packed into massive bone deficiencies in revision operations for total hip arthroplasty. We did not use additional graft or cup support for deficiencies of the lateral and medial wall. The procedure was carried out in 40 hips between 1986 and 1992. The radiographic spaces seen at the interface between HA and bone immediately after surgery disappeared within three months. Some spaces appeared between HA granules near the bone in the lateral part of two joints, and three sockets migrated in patients with severe segmental and cavitary deficiencies. Direct bonding of HA to bone was observed radiologically without morphological changes, except in the three joints with migration. All patients could walk without pain but the three with definite loosening needed crutches.
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Affiliation(s)
- H Oonishi
- Department of Orthopaedic Surgery, Osaka-Minami National Hospital, Kawachinagano-Shi, Japan
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42
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Oonishi H, Iwaki Y, Kin N, Kushitani S, Murata N, Wakitani S, Imoto K. HYDROXYAPATITE IN REVISION OF TOTAL HIP REPLACEMENTS WITH MASSIVE ACETABULAR DEFECTS. ACTA ACUST UNITED AC 1997. [DOI: 10.1302/0301-620x.79b1.0790087] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Hydroxyapatite (HA) granules of 100 to 300 μm, 0.9 to 1.2 mm and 3.0 to 5.0 mm were mixed in a ratio of 10:45:45 and packed into massive bone deficiencies in revision operations for total hip arthroplasty. We did not use additional graft or cup support for deficiencies of the lateral and medial wall. The procedure was carried out in 40 hips between 1986 and 1992. The radiographic spaces seen at the interface between HA and bone immediately after surgery disappeared within three months. Some spaces appeared between HA granules near the bone in the lateral part of two joints, and three sockets migrated in patients with severe segmental and cavitary deficiencies. Direct bonding of HA to bone was observed radiologically without morphological changes, except in the three joints with migration. All patients could walk without pain but the three with definite loosening needed crutches.
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Affiliation(s)
- H. Oonishi
- Department of Orthopaedic Surgery, Artificial Joint Section and Biomaterial Research Laboratory, Osaka-Minami National Hospital, 677-2, Kido-Cho, Kawachinagano-Shi, Osaka 586, Japan
| | - Y. Iwaki
- Department of Orthopaedic Surgery, Artificial Joint Section and Biomaterial Research Laboratory, Osaka-Minami National Hospital, 677-2, Kido-Cho, Kawachinagano-Shi, Osaka 586, Japan
| | - N. Kin
- Department of Orthopaedic Surgery, Artificial Joint Section and Biomaterial Research Laboratory, Osaka-Minami National Hospital, 677-2, Kido-Cho, Kawachinagano-Shi, Osaka 586, Japan
| | - S. Kushitani
- Department of Orthopaedic Surgery, Artificial Joint Section and Biomaterial Research Laboratory, Osaka-Minami National Hospital, 677-2, Kido-Cho, Kawachinagano-Shi, Osaka 586, Japan
| | - N. Murata
- Department of Orthopaedic Surgery, Artificial Joint Section and Biomaterial Research Laboratory, Osaka-Minami National Hospital, 677-2, Kido-Cho, Kawachinagano-Shi, Osaka 586, Japan
| | - S. Wakitani
- Department of Orthopaedic Surgery, Artificial Joint Section and Biomaterial Research Laboratory, Osaka-Minami National Hospital, 677-2, Kido-Cho, Kawachinagano-Shi, Osaka 586, Japan
| | - K. Imoto
- Department of Orthopaedic Surgery, Artificial Joint Section and Biomaterial Research Laboratory, Osaka-Minami National Hospital, 677-2, Kido-Cho, Kawachinagano-Shi, Osaka 586, Japan
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43
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Abstract
Chronic drainage of the thoracic duct to the esophagus was developed in dogs, and its efficacy in immunomodulation was tested using kidney transplantation. Compared to 9.7 days in the control, the mean animal survival was prolonged to 9.9 days, 17.8 days, and 18.5 days when TDD was applied preoperatively for 3 weeks, 6 weeks, and 9 weeks, respectively. Prolongation was significant after 6 weeks. Patency of the fistula was 93.5, 80.4, and 76.1% at respective weeks. Number of peripheral T-lymphocytes determined by a new monoclonal antibody diminished after 3 weeks. All animals were in normal health, requiring no special care for fluid, electrolyte, or protein replacement.
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Affiliation(s)
- Y Funakoshi
- Department of Surgery and Pathology, University Health Center of Pittsburgh, University of Pittsburgh, Pennsylvania, USA
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44
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Wada Y, Yagihashi A, Terasawa K, Miyao N, Hirata K, Cicciarelli J, Iwaki Y. BCX-34: a novel T-cell selective immunosuppressant: purine nucleoside phosphorylase (PNP) inhibitor. Artif Organs 1996; 20:849-52. [PMID: 8853794 DOI: 10.1111/j.1525-1594.1996.tb04557.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
We evaluated the efficacy of a new purine nucleoside phosphorylase inhibitor, BCX-34, as an immunosuppressive agent. BCX-34 showed a complete inhibitory effect on the proliferation of T-cells in an in vitro system, whereas no influence was observed in B-cell lines. In addition, it was revealed that this inhibitory effect was not due to the suppression of interleukin-2 production. Therefore, BCX-34 might be a potentially useful drug that can be used in combination, not competition, with cyclosporine A and FK506.
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Affiliation(s)
- Y Wada
- First Department of Surgery, Sapporo Medical University, School of Medicine, Japan
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45
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Kita Y, Iwaki Y, Noguchi K, Tzakis AG, Todo S, Fung JJ, Starzl TE. Daily serum inflammatory cytokine (tumor necrosis factor-alpha, interleukin-6) monitoring in liver transplantation focusing on allograft rejection: a five-case report. Transplant Proc 1996; 28:1237-40. [PMID: 8658640 PMCID: PMC2962603] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Y Kita
- Department of Surgery, University of Pittsburgh, Pennsylvania 15213, USA
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46
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Kita Y, Iwaki Y, Noguchi K, Griffith BP, Tzakis AG, Todo S, Fung JJ, Starzl TE. Daily serum interleukin-6 monitoring in multiple organ transplantation with or without liver allografts. Transplant Proc 1996; 28:1229-34. [PMID: 8658638 PMCID: PMC2955296] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Y Kita
- Department of Surgery, University of Pittsburgh, Pennsylvania 15213, USA
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47
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Abstract
Postoperative changes in coagulation parameters, including the abnormal plasma prothrombin level, were studied in 95 patients who underwent liver transplantation, and the results were compared with the clinical outcome. The patients were classified into four groups: Group I had a satisfactory postoperative course, (n = 76), Group II suffered graft failure or death at 31 days or more after transplantation (n = 9); Group III suffered graft failure or death from 8 to 30 days after transplantation (n = 4); and Group IV suffered graft failure or death within 7 days of transplantation (n = 6). The Normotest, which closely reflected liver graft function, showed an increase immediately after transplantation in Group I, II, and III, but showed a marked decrease in Group IV. In patients with severe acute cellular rejection, the plasma level of abnormal prothrombin (des-gamma-carboxy prothrombin) was compared with the histology of the liver biopsy specimen. When liver graft function was good after orthotopic transplantation, the Normotest value recovered to the normal range of 70% or more. Subsequently, graft function remained good when the des-gamma-carboxy prothrombin level stayed low, whereas acute cellular rejection was indicated by an elevation of des-gamma-carboxy prothrombin was not produced by graft with early failure, the des-gamma-carboxy prothrombin level also remained low. Thus, the Normotest value and the des-gamma-carboxy prothrombin level were both useful parameters for assessing hepatic function and rejection after transplantation.
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Affiliation(s)
- A Nakao
- Department of Surgery, University of Pittsburgh School of Medicine, PA, USA
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48
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Mañez R, Kelly RH, Kobayashi M, Takaya S, Bronsther O, Kramer D, Duquesnoy RJ, Iwaki Y, Fung JJ, Starzl TE. Immunoglobulin G lymphocytotoxic antibodies in clinical liver transplantation: studies toward further defining their significance. Hepatology 1995; 21:1345-52. [PMID: 7737641 PMCID: PMC2977952 DOI: 10.1002/hep.1840210519] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.6] [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: 01/26/2023]
Abstract
Twenty-two consecutive liver allograft recipients, who tested positive for immunoglobulin G (IgG) lymphocytotoxicity were subjected to pretransplantation and posttransplantation immunologic monitoring of anti-donor IgG lymphocytotoxic antibody titers, total hemolytic complement activity (CH100), circulating immune complexes (CIC), and platelet counts in an effort to improve our understanding of the preformed antibody state in clinical hepatic transplantation. Ten contemporaneous liver transplant recipients whose crossmatch results were negative and who experienced severe hepatocellular damage early after transplantation were included as controls. Crossmatch test results were negative 1 day after transplantation and during the 1 month follow-up remained negative in 14 of 22 (64%) sensitized recipients, most of whom had relatively low (< or = 1:16) anti-donor IgG antibody titers before transplantation. After transplantation, this group and the control group experienced no thrombocytopenia, no increase of CIC, and a gradual increase in CH100 activity that reached normal levels within 1 week. A strong negative correlation between prothrombin time (PT) and CH100 activity in these groups of patients suggested that changes in CH100 activity (P < .0005) were tightly linked to liver synthetic function. In contrast, the crossmatch test results remained positive after transplantation in 8 of 22 (36%) sensitized recipients, all of whom had relatively high (> 1:32 to 1024) pretransplantation titers of anti-donor IgG antibodies. After transplantation these patients developed a syndrome that was characterized by decreased CH100 activity and increased CIC compared with pretransplantation levels and refractory thrombocytopenia that was associated with a 50% allograft failure rate because of biopsy-proven humoral and acute (cellular) rejection.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- R Mañez
- Department of Surgery, Pittsburgh Transplant Institute, University of Pittsburgh School of Medicine, PA, USA
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49
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Yagihashi A, Takahashi S, Murase N, Starzl TE, Iwaki Y. A monoclonal antibody (L21-6) recognizing an invariant chain expressed on the cell surface in rats with the exception of the BN (RT1n): a study of tissue and strain distributions. Transplant Proc 1995; 27:1519-21. [PMID: 7725397 PMCID: PMC2958674] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- A Yagihashi
- Department of Surgery and Pathology, University of Pittsburgh, Pennsylvania, USA
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50
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Hardy B, Cicciarelli JC, Iwaki Y, Shaul D, Mendez R. Parameters governing graft survival in pediatric renal transplant recipients. Transplant Proc 1995; 27:1086-8. [PMID: 7878815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- B Hardy
- University of Southern California School of Medicine, Los Angeles
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