23 results on '"Shirotani, Y."'
Search Results
2. Spatial variations of 226Ra, 228Ra, 134Cs, and 137Cs concentrations in western and southern waters off the Korean Peninsula in July 2014
- Author
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Inoue, M., Shirotani, Y., Nagao, S., Aramaki, T., Kim, Y.I., and Hayakawa, K.
- Published
- 2018
- Full Text
- View/download PDF
3. Migration of the FDNPP-derived 134Cs and 137Cs along with 226Ra and 228Ra concentrations across the northwestern North Pacific Ocean
- Author
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Inoue, M., Shirotani, Y., Nagao, S., Kofuji, H., Volkov, Y.N., and Nishioka, J.
- Published
- 2016
- Full Text
- View/download PDF
4. Spatial variation in low-level 134Cs in the coastal sediments off central Honshu in the Sea of Japan: implications for delivery, migration, and redistribution patterns
- Author
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Inoue, Mutsuo, Uemura, H., Kofuji, H., Fujimoto, K., Takata, H., Shirotani, Y., Kudo, N., and Nagao, S.
- Published
- 2017
- Full Text
- View/download PDF
5. Migration area of the Tsushima Warm Current Branches within the Sea of Japan: Implications from transport of 228Ra
- Author
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Inoue, M., primary, Shirotani, Y., additional, Furusawa, Y., additional, Fujimoto, K., additional, Kofuji, H., additional, Yoshida, K., additional, Nagao, S., additional, Yamamoto, M., additional, Hamajima, Y., additional, Honda, N., additional, Morimoto, A., additional, Takikawa, T., additional, Shiomoto, A., additional, Isoda, Y., additional, and Minakawa, M., additional
- Published
- 2017
- Full Text
- View/download PDF
6. Spatial variation in low-level Cs in the coastal sediments off central Honshu in the Sea of Japan: implications for delivery, migration, and redistribution patterns.
- Author
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Inoue, Mutsuo, Uemura, H., Kofuji, H., Fujimoto, K., Takata, H., Shirotani, Y., Kudo, N., and Nagao, S.
- Subjects
CESIUM ,MARINE sediments ,OCEAN bottom ,SUSPENDED solids ,NUCLEAR power plant accidents - Abstract
In 2014 and 2015, we examined the spatial distribution of cesium-134 (half-life: 2.06 years) from the Fukushima Dai-ichi Nuclear Power Plant (FDNPP) in marine sediments within coastal-basin areas (water depths of 40-520 m) off central Honshu Island (the main island of Japan) in the Sea of Japan. The Cs concentrations in both the surface sediment (0-1 cm depth) and whole-core inventory exhibited wide variations, and were highest at the site closest to the Agano River Estuary area (6.7 Bq/kg-dry and 886 Bq/m, respectively). This indicates that Cs in coastal areas was delivered by riverine suspended solids (SS). Given the spatial variation in Cs concentrations, we believe that Cs partially migrated northeastward within ~50 km along Honshu Island (at water depths shallower than ~140 m), and southwestward, including the Sado Basin area. This is predominantly attributable to the transport of SS by bottom currents and unsteady downward delivery onto the steep slopes of the basin. The total amount of Cs in the study area in 2014 was estimated at approximately 0.6 TBq (decay-corrected to March 11, 2011, date of FDNPP accident). [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
- View/download PDF
7. Simple Scaling Rules on Swollen and Shrunken Polymer Gels
- Author
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Shibayama, M., Shirotani, Y., Hirose, H., and Nomura, S.
- Abstract
The equilibrium swelling ratios of temperature sensitive polymer gels have been studied as a function of the initial monomer concentration at preparation in both the swollen and the shrunken states. The linear swelling ratio, d/d
0 , was independent of the initial monomer concentration of N-isopropylacrylamide, C0 , where d and d0 are the diameters of gels at observation and at preparation, respectively. On the other hand, d/d0 was proportional to C0 in the shrunken state. The swelling curves of gels with different C0 's were successfully reproduced with a modified Flory−Rehner equation, where the effective cross-link density was modified to be proportional to C0 by taking account of the contribution of excess cross-linking by entanglement. Scaling rules for the polymer fractions were derived for both the swollen and the shrunken states; i.e., φsw ~ C0 1and φ sh ~ C0 0, where φsw and φsh are the equilibrium volume fractions of the network at the swollen and shrunken phases, respectively.- Published
- 1997
8. Alteration in length of telomeric repeats in lung cancer
- Author
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Shirotani, Y., Hiyama, K., Ishioka, S., and Inyaku, K.
- Published
- 1994
- Full Text
- View/download PDF
9. Laparoscopic observations of adhesions between peritoneal dialysis catheters and intraperitoneal organs: A retrospective, observational study.
- Author
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Maeda T, Io H, Hara K, Nakata J, Ishizaka M, Shimizu Y, Shirotani Y, Fukuzaki H, and Suzuki Y
- Subjects
- Humans, Retrospective Studies, Postoperative Complications diagnosis, Postoperative Complications etiology, Catheters, Catheters, Indwelling adverse effects, Peritoneal Dialysis adverse effects, Peritoneal Fibrosis, Laparoscopy adverse effects, Kidney Failure, Chronic
- Abstract
Laparoscopy provides extensive data for the decannulation of a peritoneal dialysis catheter and is being increasingly used to diagnose encapsulating peritoneal sclerosis. However, there are few reports on the methods of decannulation of peritoneal dialysis catheters. In this study, we examined the laparoscopic findings and postoperative complications of patients undergoing peritoneal dialysis catheter removal. A total of 119 laparoscopic decannulations of peritoneal dialysis catheters were performed between 2003 and 2018 at the Juntendo University Hospital and Juntendo University Nerima Hospital. Laparoscopy was performed during peritoneal dialysis catheter removal by a gastrointestinal surgeon. Patient characteristics such as age, sex, duration of peritoneal dialysis, history of peritonitis and age at the time of peritoneal dialysis termination were assessed. Of these 119 cases, 19 (16.0%) showed adhesion between the peritoneal dialysis catheter and intraperitoneal organs. There were 13 (10.9%) cases involving a tangled omentum, 4 (3.4%) cases involving the small intestine and 2 (1.7%) cases of adhesions extending from the bowels to the abdominal wall. No postoperative complications were associated with the laparoscopic surgery. In these cases, blind decannulation of the peritoneal dialysis catheter may result in injury to the gastrointestinal tract in patients with adhesions. Therefore, we need to pay attention to adhesions between peritoneal dialysis catheters and intraperitoneal organs, and laparoscopy could be a valuable tool in detecting such adhesions and ensuring patient safety., (© 2023 The Authors. Nephrology published by John Wiley & Sons Australia, Ltd on behalf of Asian Pacific Society of Nephrology.)
- Published
- 2023
- Full Text
- View/download PDF
10. Outpatient clinic specific for end-stage renal disease improves patient survival rate after initiating dialysis.
- Author
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Fukuzaki H, Nakata J, Nojiri S, Shimizu Y, Shirotani Y, Maeda T, Kano T, Mishiro M, Nohara N, Io H, and Suzuki Y
- Subjects
- Humans, Retrospective Studies, Survival Rate, Renal Replacement Therapy, Renal Dialysis, Kidney Failure, Chronic therapy
- Abstract
The importance of a shared decision-making (SDM) approach is widely recognized worldwide. In Japan, hospital accreditation involves the promotion of SDM for patients with end-stage renal disease (ESRD) when considering renal replacement therapy (RRT). This study aimed to clarify the effectiveness and long-term medical benefits of SDM in RRT. Patients with ESRD who underwent dialysis therapy were retrospectively divided into those who visited outpatient clinics specific for ESRD (ESRD clinic) supporting RRT selection with an SDM approach (visited group) and those who did not visit the ESRD clinic (non-visited group). Data of 250 patients (129 in the non-visited group and 121 in the visited group) were analyzed. Mortality was significantly higher in the non-visited group than in the visited group. Not seeing an ESRD specialist was associated with emergent initiation of dialysis and subsequent 1 year mortality. The number of patients who chose peritoneal dialysis as a modality of RRT was significantly larger in the visited group. These findings demonstrate the association between the ESRD clinic, 1 year survival in patients with ESRD after initiating dialysis, and the different RRT modalities. This specific approach in the ESRD clinic may improve the management of patients with ESRD., (© 2023. The Author(s).)
- Published
- 2023
- Full Text
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11. Cesium-137 and 137 Cs/ 133 Cs atom ratios in marine zooplankton off the east coast of Japan during 2012-2020 following the Fukushima Dai-ichi nuclear power plant accident.
- Author
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Ikenoue T, Yamada M, Ishii N, Kudo N, Shirotani Y, Ishida Y, and Kusakabe M
- Subjects
- Animals, Cesium, Cesium Radioisotopes analysis, Japan, Nuclear Power Plants, Plastics, Zooplankton, Fukushima Nuclear Accident, Radiation Monitoring, Water Pollutants, Radioactive analysis
- Abstract
We measured the concentrations of cesium isotopes (
133 Cs,134 Cs, and137 Cs) in zooplankton samples collected in waters off the east coast of Japan from May 2015 to June 2020. By combining these data with those obtained previously from May 2012 to February 2015, we evaluated the long-term impacts of the Fukushima Dai-ichi Nuclear Power Plant accident on marine zooplankton. Relatively high137 Cs concentrations in zooplankton, exceeding 10 Bq/kg-dry weight, were sporadically observed until June 2016, regardless of year or station. After May-June 2017,137 Cs concentrations decreased to below 1 Bq/kg-dry at most stations, and by May 2020, concentrations were below 0.5 Bq/kg-dry except those off Fukushima Prefecture. Since the accident, the137 Cs/133 Cs atom ratios of zooplankton samples were higher than those of ambient seawater until 2019, but in May-June 2020 the ratios matched those of seawater except off Fukushima Prefecture. Highly radioactive particles were not detected in zooplankton samples by autoradiography using imaging plates after May-June 2017, although they were before. Therefore, the persistence of elevated137 Cs/133 Cs ratios in zooplankton relative to seawater for nine years after the accident was probably due to the incorporation of highly radioactive particles (cesium-bearing particles or clay-mineral aggregates with highly adsorbed radiocesium) onto/into zooplankton for several years after the accident. However, since at least May-June 2017, these elevated ratios have likely been caused by small highly radioactive particles (or larger particles disaggregated into small pieces) entering the ocean from land via rivers or directly discharged from the Fukushima Nuclear Power Plant. Microplastics enriched with radiocesium with higher137 Cs/133 Cs ratios than seawater may have also contributed137 Cs to the zooplankton., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2022 Elsevier Ltd. All rights reserved.)- Published
- 2022
- Full Text
- View/download PDF
12. Negative-pressure wound therapy is effective for peritoneal dialysis catheter exit-site management in the early postoperative period.
- Author
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Fukuzaki H, Nakata J, Nojiri S, Shimizu Y, Kano T, Shirotani Y, Maeda T, Nohara N, Io H, and Suzuki Y
- Subjects
- Adult, Aged, Aged, 80 and over, Catheter-Related Infections etiology, Female, Humans, Kidney Failure, Chronic diagnosis, Male, Middle Aged, Peritoneal Dialysis adverse effects, Peritonitis etiology, Time Factors, Tokyo, Treatment Outcome, Catheter-Related Infections prevention & control, Catheters, Indwelling, Kidney Failure, Chronic therapy, Negative-Pressure Wound Therapy, Peritoneal Dialysis instrumentation, Peritonitis prevention & control
- Abstract
Peritoneal dialysis (PD) catheter exit-site care is critically important for the prevention of catheter-related infections (CRIs) and subsequent peritonitis. The postoperative management of the site is particularly essential because it has an open wound that is always adjacent to a PD catheter tube. This study aimed to examine the effectiveness of negative-pressure wound therapy (NPWT) for postoperative PD catheter exit sites. Thirty patients with end-stage renal disease who underwent simultaneous PD catheter insertion and exit-site formation were randomly assigned to receive NPWT (NPWT group) or conventional dressing (non-NPWT group) for the first seven postoperative days. The exit-site scores on the seventh postoperative day was lower in the NPWT group than in the non-NPWT group (p = 0.0049). Analysis of variance F statistic for the effect of NPWT over 180 days was highly significant (11.482595, p = 0.007). There were no statistically significant differences between the time to first CRI and PD-related peritonitis between the two groups. There was one case of CRI with relapsing peritonitis and catheter loss in the non-NPWT group. These findings demonstrate the association between NPWT and low exit-site score. NPWT can be recommended for the management of PD catheter exit sites in the early postoperative period., (© 2022. The Author(s).)
- Published
- 2022
- Full Text
- View/download PDF
13. An Unusual Case of Recurrent Migration of the Peritoneal Dialysis Catheter into the Inguinal Hernia Sac.
- Author
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Fukuzaki H, Nakata J, Shirotani Y, Shimizu Y, Maiguma M, Nohara N, and Suzuki Y
- Abstract
We herein report the first case of a patient with recurrent migration of the peritoneal dialysis (PD) catheter into the inguinal hernia sac. A 58-year-old man suffered from end-stage renal disease due to polycystic kidney disease (PKD). A year before starting PD, a PD catheter was implanted with stepwise initiation of PD using the Moncrief-Popovich technique. He complained of drain failure and right inguinal swelling during the induction period and was diagnosed with right inguinal hernia. Further examination revealed that the PD catheter tip had migrated into the inguinal hernia sac. Although surgery was planned, the PD catheter tip spontaneously migrated back into the intra-peritoneal space. 14 months later, he noticed fill and drain failure again. Diagnosis was PD catheter dysfunction due to migration into the right inguinal hernia sac. PD was resumed without issues after repositioning of the PD catheter and repair of the inguinal hernia. Inguinal hernia is a frequent complication in PD patients, especially in those with PKD. Early diagnosis and treatment of hernia should be considered in PD patients., Competing Interests: The authors have no conflicts of interest to declare., (Copyright © 2021 by S. Karger AG, Basel.)
- Published
- 2021
- Full Text
- View/download PDF
14. Transuranic nuclides Pu, Am and Cm isotopes, and 90 Sr in seafloor sediments off the Fukushima Daiichi Nuclear Power Plant during the period from 2012 to 2019.
- Author
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Yamada M, Oikawa S, Shirotani Y, Kusakabe M, and Shindo K
- Subjects
- Americium analysis, Curium analysis, Japan, Nuclear Power Plants, Plutonium analysis, Strontium Radioisotopes, Fukushima Nuclear Accident, Radiation Monitoring, Water Pollutants, Radioactive analysis
- Abstract
The
238 Pu,239+240 Pu,241 Am,242 Cm,243+244 Cm and90 Sr concentrations in seafloor surface sediments collected at three sampling stations off the Fukushima Daiichi Nuclear Power Plant (FDNPP) site during the period from 2012 to 2019 were determined to elucidate the impacts of the FDNPP accident onto their concentrations in coastal sediments and to discuss the sources of the measured radionuclides. The239+240 Pu,241 Pu and241 Am concentrations and240 Pu/239 Pu atom ratios in a sediment core were also determined to allow comparison of their inventories between this study and previously reported values and to identify the Pu sources. The238 Pu,239+240 Pu,241 Am and90 Sr concentrations showed no remarkable temporal variations; no significant increases in concentrations after the FDNPP accident were observed; these concentrations were comfortably within the previously reported concentration range; and no detectable242 Cm and243+244 Cm amounts were observed in surface sediments. The observed238 Pu/239+240 Pu activity ratios were approximately two orders of magnitudes lower than those for the damaged FDNPP reactor core inventories and the observed values in terrestrial samples after the accident. The239+240 Pu,241 Pu and241 Am inventories in the sediment core were 389 ± 5, 503 ± 33 and 214 ± 3 Bq m-2 , respectively. The239+240 Pu inventory was about an order of magnitude greater than the expected cumulative deposition density of global fallout from atmospheric nuclear weapons testing due to an enhanced scavenging effect. The240 Pu/239 Pu atom ratios in the sediment core ranged from 0.239 to 0.246 with a mean value of 0.242 ± 0.002; these ratios were clearly greater than the mean global fallout ratio of 0.18. The results for238 Pu/239+240 Pu activity ratios and240 Pu/239 Pu atom ratios reflected a mixture of global fallout and Pacific Proving Grounds (PPG) close-in fallout Pu rather than Fukushima accident-derived Pu. The sediment column inventory for239+240 Pu originating from the PPG close-in fallout was calculated as 166 Bq m-2 , which corresponded to 43% of the total inventory. A significant amount of the PPG-derived Pu has been transported by ocean currents and then preferentially scavenged in the coastal waters of Japan., (Copyright © 2020 Elsevier Ltd. All rights reserved.)- Published
- 2021
- Full Text
- View/download PDF
15. Emergent initiation of dialysis is related to an increase in both mortality and medical costs.
- Author
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Shimizu Y, Nakata J, Yanagisawa N, Shirotani Y, Fukuzaki H, Nohara N, and Suzuki Y
- Subjects
- Acute Kidney Injury therapy, Aged, Female, Follow-Up Studies, Humans, Japan, Male, Middle Aged, Prognosis, Retrospective Studies, Risk Factors, Acute Kidney Injury economics, Acute Kidney Injury mortality, Health Care Costs statistics & numerical data, Referral and Consultation standards, Renal Dialysis economics, Renal Dialysis mortality
- Abstract
The number of patients with end-stage renal disease (ESRD) has been increasing, with dialysis treatment being a serious economic problem. To date, no report in Japan considered medical costs spent at the initiation of dialysis treatment, although some reports in other countries described high medical costs in the first year. This study focused on patient status at the time of initiation of dialysis and examined how it affects prognosis and the medical costs. As a result, all patients dying within 4 months experienced emergent dialysis initiation. Emergent dialysis initiation and high medical costs were risk factors for death within 2 years. High C-reactive protein levels and emergent dialysis initiation were associated with increasing medical costs. Acute kidney injury (AKI) contributed most to emergent dialysis initiation followed by stroke, diabetes, heart failure, and short-term care by nephrologists. Therefore, emergent dialysis initiation was a contributing factor to both death and increasing medical costs. To avoid the requirement for emergent dialysis initiation, patients with ESRD should be referred to nephrologists earlier. Furthermore, ESRD patients with clinical histories of AKI, stroke, diabetes, or heart failure should be observed carefully and provided pre-planned initiation of dialysis.
- Published
- 2020
- Full Text
- View/download PDF
16. Circulation paths of 134 Cs in seawater southwest of Japan in 2018 and 2019.
- Author
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Inoue M, Takehara R, Takikawa T, Shirotani Y, Morita T, Honda N, and Nagao S
- Subjects
- Cesium Radioisotopes analysis, Japan, Pacific Ocean, Seawater, Fukushima Nuclear Accident, Radiation Monitoring, Water Pollutants, Radioactive analysis
- Abstract
The spatial variations of low-level
134 Cs concentrations (activities) in seawater off the Japanese Archipelago, particularly in the eastern East China Sea (ECS), in 2018 and 2019 were examined. The134 Cs concentrations, decay-corrected to the date of the Fukushima Dai-ichi Nuclear Power Plant accident, in seawaters were 0.5-2.0 mBq/L. High134 Cs concentrations (1.1-2.0 mBq/L) of the Kuroshio Current subsurface water (densities of 25-26σθ ) in the eastern ECS could indicated the contribution of the subtropical mode water from the Pacific Ocean side, and total column inventories were 330-426 Bq/m2 . In contrast, as indicated by the same134 Cs concentration level at the surface of the eastern ECS and Sea of Japan, larger portions of the subsurface waters remained in the ECS and Yellow Sea side in response to the existence of the shallow Tsushima Strait., (Copyright © 2020 Elsevier Ltd. All rights reserved.)- Published
- 2020
- Full Text
- View/download PDF
17. Predictive Value of 1-Week Postoperative Ultrasonography Findings for the Patency Rate of Arteriovenous Fistula.
- Author
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Shimizu Y, Nakata J, Maiguma M, Shirotani Y, Fukuzaki H, Nohara N, Io H, and Suzuki Y
- Abstract
Introduction: Most guidelines in different countries recommend waiting more than 2 weeks for the initial cannulation of an arteriovenous fistula (AVF) after its creation. Although an experienced examiner can subjectively determine if an AVF is ready for early cannulation, there is a lack of objective information to guide whether early cannulation is appropriate or how early cannulation may affect an AVF's primary patency. The current study examined the relationship between the initial cannulation and the prognosis of AVF, considering ultrasonography (US) findings., Methods: This retrospective observational study enrolled 103 patients with end-stage renal disease who had started hemodialysis therapy from 2013 to 2015 at the Juntendo University Hospital. All patients had been given a primary AVF before or after the initiation of dialysis, had undergone US examinations both before and 7 days after surgery, had initially cannulated the AVF at ≥7 days after surgery, and were observed for over 1 year., Results: The factor associated with the loss of primary patency was a resistance index of brachial artery ≥0.65 on US examination at 7 days after surgery. There was no significant difference in patency rate between the early (within 14 days after surgery) and late initial cannulation groups (≥15 days after surgery)., Conclusion: Because a resistance index <0.65 on US findings at 7 days after surgery was a good indicator for predicting an excellent patency rate when we performed first cannulation of AVF located in the forearm within 2 weeks after its creation, 1-week postoperative US evaluation may provide crucial information., (© 2020 International Society of Nephrology. Published by Elsevier Inc.)
- Published
- 2020
- Full Text
- View/download PDF
18. Radiocesium in the swash zones off the coast of the Japan Sea.
- Author
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Takata H, Inoue M, Shirotani Y, and Kudo N
- Abstract
Radiocesium concentrations were measured in seawater and sediment samples collected in the swash zones in Ishikawa and Niigata prefectures, off the coast of Japan Sea opposite to the side where TEPCO Fukushima dai-ichi Nuclear Power Plant (FDNPP) is located in September 2016 and August 2017, five to six years after the accident. Cs-134 in the seawater samples was detected, suggesting the intrusion of FDNPP-derived radiocesium in both swash zones. FDNPP-derived radiocesium was appeared to be transported by the Tsushima Warm Current. In the surface sediments only
137 Cs was detected during the sampling period. We could not find out the presence of the FDNPP-derived radiocesium in the corresponding sediment on the swash zones; however, detected radiocesium in those sediments was assumed to be influenced by137 Cs of FDNPP-derived radiocesium little for Ishikawa area and some for Niigata area., (Copyright © 2018 Elsevier Ltd. All rights reserved.)- Published
- 2018
- Full Text
- View/download PDF
19. [Differences between gynecological cancer patients taken care for at home and those taken care for at the hospital].
- Author
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Yajima M, Okamura K, Ijichi R, Hida K, Takamatsu K, Ohta H, Tohma H, Shirotani Y, and Ariga E
- Subjects
- Adult, Aged, Female, Humans, Middle Aged, Quality of Life, Survival Rate, Genital Neoplasms, Female mortality, Home Care Services, Hospital-Based statistics & numerical data, Hospitalization statistics & numerical data
- Abstract
Thirty-five patients with end-stage gynecological cancer, twelve taken care for at home care and 23 taken care for at our hospital, were compared. The life span after recurrence was significantly (p < 0.05) longer in the group taken care for at home. The number of persons living with the patient was also significantly (p < 0.01) larger in the group taken care for at home. Moreover, the hospitalization in the end stage of the disease was significantly (p < 0.01) shorter in the group taken care for at home. The average hospitalization in the end was for 6.5 days. Four patients died at their home. Average period the 12 patients stayed at home was 52.7 days. Following matters are important in order to provide home care. 1. We must know the biological characteristics of the cancer. 2. It is important that it does not lose the timing to which shift to the home care, keeping good doctor-patient relationship. 3. Limit of the therapy against cancer and importance of treatment at home should be carefully and clearly explained to the patient.
- Published
- 2001
20. Alterations in telomeric repeat length in lung cancer are associated with loss of heterozygosity in p53 and Rb.
- Author
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Hiyama K, Ishioka S, Shirotani Y, Inai K, Hiyama E, Murakami I, Isobe T, Inamizu T, and Yamakido M
- Subjects
- Base Sequence, Chromosomes, Human, Pair 1, Genes, ras, Humans, Molecular Sequence Data, Mutation, Chromosome Deletion, Genes, Retinoblastoma, Genes, p53, Lung Neoplasms genetics, Telomere
- Abstract
In the two-stage model of controlling cellular senescence in cultured human fibroblasts, retinoblastoma (Rb) and p53 proteins may be key factors regulating the mortality stage 1 mechanism. In addition, the critical loss of telomeric DNA due to the end-replication problem may result in the mortality stage 2 mechanism. Cells which acquire telomerase activity can overcome the M2 mechanism by stabilizing telomere length and thus become immortal (telomere hypothesis). At present it is known whether cellular immortality is a prerequisite for all human cancers. To investigate this question and the applicability of the two-stage model to human cancers, we analysed the relationship between alterations of telomere length and other genetic changes in lung cancer. Among 60 primary lung cancer tissues, telomere length alterations were observed in 16 tumors (26.7%) including 14 with short and two with elongated telomeres. Ten of them revealed allelic loss of both p53 and Rb genes, and remaining six showed no abnormalities in both genes. We propose that inactivation of both p53 and Rb genes may promote cell divisions causing telomere shortening in lung cancer as in the two-stage model, while there may be another pathway to overcome both M1 and M2 mechanisms, especially for adenocarcinoma.
- Published
- 1995
21. Duplication polymorphism within the third intron of the p53 gene is a rare event in Japanese population.
- Author
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Hiyama K, Takeda M, Shirotani Y, Ishioka S, Awaya Y, Inai K, Inyaku K, Hozawa S, Inamizu T, and Yamakido M
- Subjects
- Alleles, Gene Frequency, Humans, Introns, Japan, Genes, p53 genetics, Polymorphism, Genetic
- Published
- 1994
- Full Text
- View/download PDF
22. [Bronchoalveolar lavage fluid findings in rheumatoid arthritis].
- Author
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Ishioka S, Inyaku K, Shirotani Y, Nakamura K, Oyama T, Hozawa S, Takahashi K, and Yamakido M
- Subjects
- Aged, Arthritis, Rheumatoid immunology, Female, Humans, Leukocyte Count, Lymphocyte Subsets, Male, Middle Aged, Neutrophils cytology, Pulmonary Fibrosis pathology, Arthritis, Rheumatoid pathology, Bronchoalveolar Lavage Fluid cytology
- Abstract
Findings of bronchoalveolar lavage fluid (BALF) were compared among three groups of patients: rheumatoid arthritis (RA) with or without interstitial lung disease (ILD), and collagen disease other than RA accompanied by ILD. Regardless of the presence or absence of associated ILD, the RA groups showed higher numbers of neutrophils in BALF with a mean number about 10 times that of the collagen disease group. In contrast, the percentages of lymphocytes in the RA groups were lower than that in the collagen disease group. Classification of alveolitis on the basis of BALF findings revealed neutrophil type (N) in 55% of the RA patients and lymphocyte type (L) in 25%. In the collagen disease group, N was found in 15.4%, and L in 38.5%. Regarding the lymphocyte subsets, many patients with RA accompanied by ILD had a CD 4/8 ratio of 1 or great. These findings suggest that highly characteristic neutrophil alveolitis is present in the pulmonary interstitium from the initial stage of RA.
- Published
- 1992
23. [Case of muco-cutaneo-ocular syndrome with pronounced jaundice].
- Author
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YOSHIMURA K, ISAMI K, SHIROTANI Y, and URAYAMA A
- Subjects
- Humans, Disease, Endophthalmitis, Eye Diseases, Jaundice, Medical Records, Mucous Membrane
- Published
- 1962
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