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Osman K, Ahmet K, Hilmi T, İlker N, Ercan Ö, Devrim Ç, Murat S, Emre Ç, İlhan H, Mustafa G, Yüksel Ü, Bahiddin Y, Cihan E, Mehmet Ali NŞ, Emrah E, Umut D, Zeynep O, Mehmet Ali K, Ali G, İvo G, Erkan Ö, Muhammet B, Bülent E, Selma D, Sernaz U, Mahmut G, Hakan G, İrfan Ç. BRCA 1/BRCA 2 Pathogenic/Likely Pathogenic Variant Patients with Breast, Ovarian, and Other Cancers. Balkan J Med Genet 2023; 25:5-14. [PMID: 37265975 PMCID: PMC10230841 DOI: 10.2478/bjmg-2022-0023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023] Open
Abstract
The demographic and clinical characteristics of patients who have BRCA 1/BRCA 2 pathogenic/likely pathogenic variants may differ from their relatives who had BRCA-related cancer. In this study, we aimed to demonstrate the clinical and demographic findings of patients who had BRCA-related cancer and to assess the differences comparing their relatives who had BRCA-related cancer with breast, genital tract, prostate, and pancreas cancers as well. The results of sequencing analysis of 200 cancer patients (190 women, 10 men) who have been directed to genetic counseling with an indication of BRCA1/BRCA2 testing from different regions across 9 medical oncology centers were retrospectively analyzed. A total of 200 consecutive cancer patients who harbored the BRCA1/BRCA2 pathogenic/likely pathogenic variant (130 (65%) patients harbored BRCA 1 pathogenic/likely pathogenic variant, and 70 harbored BRCA 2 pathogenic/likely pathogenic variant) were included. Of these, 64.0% had breast cancer (43.8% of them had the triple-negative disease, and about 2.3% had only the HER-2 mutant), 31.5% had genital cancers (92.1% of them had ovarian cancer, 3.2% had endometrium, and 1.6% had peritoneum cancer as the primary site and mostly serous adenocarcinoma was the most common histopathology and 14.3% of the patients had endometrioid adenocarcinoma), 3.5% had prostate (median time from metastasis to castration-resistant status was 28 months) and 1.0% had pancreas cancer. Newly diagnosed cancer (breast and ovary) patients who had BRCA 1/BRCA 2 pathogenic/ likely pathogenic variant were younger than their previous cancer diagnosed (breast, ovary, and pancreas) parents who harbored BRCA pathogenic/likely pathogenic variant. We suggest that the genetic screening of BRCA 1/ BRCA 2 pathogenic/likely pathogenic variant is needed as a routine screening for those with a personal or family history of breast, ovarian, tubal, or peritoneal cancer. In addition, once BRCA 1 or BRCA 2 germline pathogenic variant has been identified in a family, testing of at-risk next-generation relatives earlier can identify those family members who also have the familial pathogenic variant, and thus need increased surveillance.
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Affiliation(s)
- K. Osman
- Marmara University, School of Medicine, Department of Medical Oncology, İstanbul, Turkey
| | - K. Ahmet
- Trakya University, Department of Medical Oncology, Edirne, Turkey
| | - T. Hilmi
- Namık Kemal University, Department of Medical Genetic, Tekirdag, Turkey
| | - N.O. İlker
- Medeniyet University, Department of Medical Oncology, İstanbul, Turkey
| | - Ö. Ercan
- Kocaeli University, Department of Medical Oncology, Kocaeli, Turkey
| | - Ç. Devrim
- Kocaeli University, Department of Medical Oncology, Kocaeli, Turkey
| | - S. Murat
- Marmara University, School of Medicine, Department of Medical Oncology, İstanbul, Turkey
| | - Ç. Emre
- Sakarya University, Department of Medical Oncology, Sakarya, Turkey
| | - H. İlhan
- Sakarya University, Department of Medical Oncology, Sakarya, Turkey
| | - G. Mustafa
- Ankara university, Department of Medical Oncology, Ankara, Turkey
| | - Ü. Yüksel
- Ankara university, Department of Medical Oncology, Ankara, Turkey
| | - Y. Bahiddin
- Ondokuz Mayıs University, Department of Medical Oncology, Samsun, Turkey
| | - E. Cihan
- Ankara City Hospital, Yildirim Beyazit University, Department of Medical Oncology, Ankara, Turkey
| | - N. Ş. Mehmet Ali
- Ankara City Hospital, Yildirim Beyazit University, Department of Medical Oncology, Ankara, Turkey
| | - E. Emrah
- University of Health Sciences, Dr. A.Y Ankara Oncology Research and Education Hospital, Oncology Department, Ankara, Turkey
| | - D. Umut
- University of Health Sciences, Dr. A.Y Ankara Oncology Research and Education Hospital, Oncology Department, Ankara, Turkey
| | - O. Zeynep
- Dicle University, Department of Medical Oncology, Diyarbakır, Turkey
| | - K. Mehmet Ali
- Trakya University, Department of Medical Genetic, Edirne, Turkey
| | - G. Ali
- Trakya University, Department of Medical Oncology, Edirne, Turkey
| | - G. İvo
- Trakya University, Department of Medical Oncology, Edirne, Turkey
| | - Ö. Erkan
- Trakya University, Department of Medical Oncology, Edirne, Turkey
| | - B.H. Muhammet
- Trakya University, Department of Medical Oncology, Edirne, Turkey
| | - E. Bülent
- Trakya University, Department of Medical Oncology, Edirne, Turkey
| | - D. Selma
- Trakya University, Department of Medical Genetic, Edirne, Turkey
| | - U. Sernaz
- Trakya University, Department of Medical Oncology, Edirne, Turkey
| | - G. Mahmut
- Medeniyet University, Department of Medical Oncology, İstanbul, Turkey
| | - G. Hakan
- Trakya University, Department of Medical Genetic, Edirne, Turkey
| | - Ç. İrfan
- Trakya University, Department of Medical Oncology, Edirne, Turkey
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Nazir N, Imran M, Bodlah I, Mahmood K, Khan MR, Osman K, Rasool A, Usman M, Din AU. Distribution, host range and toxicity assessment of different insecticides on Bactrocera diversa Coquillett, 1904 (Diptera: Tephritidae). BRAZ J BIOL 2022; 84:e263261. [PMID: 36102373 DOI: 10.1590/1519-6984.263261] [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] [Received: 04/20/2022] [Accepted: 08/07/2022] [Indexed: 06/15/2023] Open
Abstract
The present study was conducted to investigate the array of hosts, distribution and to evaluate the toxicity of four insecticides: imidacloprid, fipronil, cypermethrin and chlorpyrifos alone and in combination against 3rd instar maggot and adult stage of fruit fly Bactrocera diversa Coquillett, 1904 (Diptera: Tephritidae) during 2021. B. diversa maggots were found vigorously feeding inside the cucurbit hosts (pumpkin, cucumber, bitter gourd, watermelon, round melon, bottle gourd) collected from different localities of Poonch division of Azad Jammu & Kashmir, Pakistan, and this species is reported for the first time as new record to this region. Susceptibilities of B. diversa to insecticides were evaluated using topical method. Mortality was checked after 3, 6, 8 and 24h of exposure. Cypermethrin was most effective to kill 50% of both larval and adult stage with least LC50 [7.2(1.040±0.214), 17.4(0.748±0.193)], respectively followed by imidacloprid. Imidacloprid most effectively killed 90% of both larval and adult population with least LC90 value [73.2 (3.013±0.708) 16.9 (1.886±0.437)] respectively after 24 hours. Cypermethrin with chlorpyrifos most effectively killed 50 and 90 percent of both larval and adult stage of B. diversa with least LC50 value [11.3 (1.085±0.245), 2.5 (0.759±0.252)] and least LC90 value [171.3 (1.085±0.245), 121.9 (0.759±0.252)], respectively after 24h of exposure. Toxicity of each insecticide increased with exposure for longer time and increased dose. Cypermethrin is suggested as most effective against both larval and adult stages of B. diversa in combination with chlorpyrifos followed by imidacloprid.
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Affiliation(s)
- N Nazir
- University of Poonch Rawalakot, Faculty of Agriculture, Department of Entomology, Rawalakot, Azad Jammu & Kashmir, Pakistan
| | - M Imran
- University of Poonch Rawalakot, Faculty of Agriculture, Department of Entomology, Rawalakot, Azad Jammu & Kashmir, Pakistan
| | - I Bodlah
- Pir Mehr Ali Shah Arid Agriculture University, Department of Entomology, Rawalpindi, Pakistan
| | - K Mahmood
- University of Poonch Rawalakot, Faculty of Agriculture, Department of Entomology, Rawalakot, Azad Jammu & Kashmir, Pakistan
| | - M R Khan
- University of Poonch Rawalakot, Faculty of Agriculture, Department of Entomology, Rawalakot, Azad Jammu & Kashmir, Pakistan
| | - K Osman
- Alexandria University, Faculty of Agriculture, Department of Pesticide Chemistry & Toxicology, Alexandria, Egypt
| | - A Rasool
- University of Swat, Centre for Biotechnology and Microbiology, Charbagh, Pakistan
| | - M Usman
- University of Poonch Rawalakot, Faculty of Agriculture, Department of Entomology, Rawalakot, Azad Jammu & Kashmir, Pakistan
| | - A U Din
- University of Poonch Rawalakot, Faculty of Agriculture, Department of Entomology, Rawalakot, Azad Jammu & Kashmir, Pakistan
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Ahmed M, Ahmed M, Dey S, Osman K, Mohamed A, Abdelrahman N. Pain Control With Intra-Articular Steroid Injection Can Reduce Dementia-related Mood and Behavioral Changes in Nursing Home Settings. J Am Med Dir Assoc 2021; 22:B7. [PMID: 34287187 DOI: 10.1016/j.jamda.2021.01.012] [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: 10/22/2022]
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Umer A, Zinsstag J, Schelling E, Tschopp R, Hattendof J, Osman K, Yuya M, Ame A, Zemp E. Antenatal care and skilled delivery service utilisation in Somali pastoral communities of Eastern Ethiopia. Trop Med Int Health 2019; 25:328-337. [PMID: 31733130 PMCID: PMC7079025 DOI: 10.1111/tmi.13346] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Objective To assess maternal health care service utilisation and associated factors in Somali pastoral communities of eastern Ethiopia. Methods Community‐based cross‐sectional study complemented by qualitative assessments in Adadle district, Somali region, eastern Ethiopia, among 450 women in six kebeles from August to September 2016. Logistic regression was used to assess factors associated with antenatal care use and skilled delivery care use, controlling for confounders. Results About 27% [95%CI 22.8–31.2%] of women used antenatal care, and 22.6% [95%CI 18.7–26.5%] received skilled delivery service. None of the respondents reported post‐natal care. About 43% reported that they had no knowledge of antenatal care, and 46% did not perceive delivery at a health facility as important. Pastoral lifestyle, husband’s educational status, women’s attitude towards health care service and financial support from the husband were significantly associated with antenatal care utilisation. Health professionals’ attitudes, perceptions of institutional delivery, antenatal care utilisation and information about exemptions from maternal health care fees were associated with skilled delivery service utilisation. Conclusion Improving community awareness of antenatal care, employing female health professionals and culturally adapted guidelines could improve skilled delivery utilisation. In a patriarchal society, involving male partners in all maternal health issues is essential to increase use of maternal health services and to decrease maternal mortality.
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Affiliation(s)
- A Umer
- Jigjiga University, Jigjiga, Ethiopia.,Swiss Tropical and Public Health Institute, Basel, Switzerland.,University of Basel, Basel, Switzerland
| | - J Zinsstag
- Swiss Tropical and Public Health Institute, Basel, Switzerland.,University of Basel, Basel, Switzerland
| | - E Schelling
- Swiss Tropical and Public Health Institute, Basel, Switzerland.,University of Basel, Basel, Switzerland
| | - R Tschopp
- Swiss Tropical and Public Health Institute, Basel, Switzerland.,University of Basel, Basel, Switzerland.,Armauer Hansen Research Institute, Addis Ababa, Ethiopia
| | - J Hattendof
- Swiss Tropical and Public Health Institute, Basel, Switzerland.,University of Basel, Basel, Switzerland
| | - K Osman
- Jigjiga University, Jigjiga, Ethiopia.,Swiss Tropical and Public Health Institute, Basel, Switzerland.,University of Basel, Basel, Switzerland
| | - M Yuya
- Jigjiga University, Jigjiga, Ethiopia
| | - A Ame
- Dire Dawa University, Dire Dawa, Ethiopia
| | - E Zemp
- Swiss Tropical and Public Health Institute, Basel, Switzerland.,University of Basel, Basel, Switzerland
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Roy K, Forstein D, Osman K, Gee P, Johns D. 12-Month Procedural Outcomes of the SONATA Pivotal IDE Trial: Sonography-Guided Transcervical Radiofrequency Ablation of Uterine Fibroids. J Minim Invasive Gynecol 2018. [DOI: 10.1016/j.jmig.2018.09.399] [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: 10/28/2022]
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Osman K, Dumitru I, Douglas F, Demuth K, Shen M, Perryman R. 1107Improved healthcare cost by reducing all unnecessary hospital admissions beyond 30-day readmissions: a new clinical model using interreality care for value-based paradigm. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.1107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- K Osman
- Duxlink Health, Sunrise, United States of America
| | - I Dumitru
- Memorial Health Network, Hollywood, United States of America
| | - F Douglas
- Duxlink Health, Sunrise, United States of America
| | - K Demuth
- Duxlink Health, Sunrise, United States of America
| | - M Shen
- Duxlink Health, Sunrise, United States of America
| | - R Perryman
- Memorial Health Network, Hollywood, United States of America
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Dumitru I, Osman K, Justillien E, Owusu B, Shen M, Perryman R. P4494Improved both healthcare and hospital costs by interreality care: a new service and financial model of interreality care in high risk patients with frequent readmissions. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy563.p4494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- I Dumitru
- Memorial Health Network, Hollywood, United States of America
| | - K Osman
- Duxlink Health, Sunrise, United States of America
| | - E Justillien
- Memorial Health Network, Hollywood, United States of America
| | - B Owusu
- Duxlink Health, Sunrise, United States of America
| | - M Shen
- Duxlink Health, Sunrise, United States of America
| | - R Perryman
- Memorial Health Network, Hollywood, United States of America
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Khudzari A, Thomas S, Empaling S, Darlis N, Osman K, Dillon J, Taib I. Computational Fluid Dynamic Study of a Spiral Flow Inducing Cannula Versus Standard Cannula. Int J Cardiol 2017. [DOI: 10.1016/j.ijcard.2017.09.051] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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9
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Osman K, Wemyss-Holden S, Miller A. A Chylous Rupture. J R Soc Med 2017; 95:616-7. [PMID: 12461153 PMCID: PMC1279293 DOI: 10.1177/014107680209501213] [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: 11/15/2022] Open
Affiliation(s)
- K Osman
- Department of Surgery, University Hospitals of Leicester NHS Trust, Leicester Royal Infirmary, Leicester LE1 5WW, UK.
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Osman K, Panagiotidou AP, Khan M, Blunn G, Haddad FS. Corrosion at the head-neck interface of current designs of modular femoral components. Bone Joint J 2016; 98-B:579-84. [DOI: 10.1302/0301-620x.98b5.35592] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Accepted: 12/10/2015] [Indexed: 11/05/2022]
Abstract
There is increasing global awareness of adverse reactions to metal debris and elevated serum metal ion concentrations following the use of second generation metal-on-metal total hip arthroplasties. The high incidence of these complications can be largely attributed to corrosion at the head-neck interface. Severe corrosion of the taper is identified most commonly in association with larger diameter femoral heads. However, there is emerging evidence of varying levels of corrosion observed in retrieved components with smaller diameter femoral heads. This same mechanism of galvanic and mechanically-assisted crevice corrosion has been observed in metal-on-polyethylene and ceramic components, suggesting an inherent biomechanical problem with current designs of the head-neck interface. We provide a review of the fundamental questions and answers clinicians and researchers must understand regarding corrosion of the taper, and its relevance to current orthopaedic practice. Cite this article: Bone Joint J 2016;98-B:579–84.
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Affiliation(s)
- K. Osman
- Royal National Orthopaedic Hospital, Brockley
Hill, Stanmore HA7 4LP, UK
| | - A. P. Panagiotidou
- Royal National Orthopaedic Hospital, Brockley
Hill, Stanmore HA7 4LP, UK
| | - M. Khan
- University College London, 170 Tottenham
Court Road, London W1T 7HA, UK
| | - G. Blunn
- Royal National Orthopaedic Hospital, Brockley
Hill, Stanmore HA7 4LP, UK
| | - F. S. Haddad
- University College London Hospitals, 235
Euston Road, London, NW1
2BU, UK
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Abstract
Total knee arthroplasty (TKA) is a cost effective and extremely successful operation. As longevity increases, the demand for primary TKA will continue to rise. The success and survivorship of TKAs are dependent on the demographics of the patient, surgical technique and implant-related factors. Currently the risk of failure of a TKA requiring revision surgery ten years post-operatively is 5%. The most common indications for revision include aseptic loosening (29.8%), infection (14.8%), and pain (9.5%). Revision surgery poses considerable clinical burdens on patients and financial burdens on healthcare systems. We present a current concepts review on the epidemiology of failed TKAs using data from worldwide National Joint Registries. Cite this article: Bone Joint J 2016;98-B(1 Suppl A):105–12.
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Affiliation(s)
- M. Khan
- University College London Hospitals, Ground
Floor, 250 Euston Road, London, NW1 2PG, UK
| | - K. Osman
- University College London Hospitals, Ground
Floor, 250 Euston Road, London,
NW1 2PG, UK
| | - G. Green
- University College London Hospitals, Ground
Floor, 250 Euston Road, London,
NW1 2PG, UK
| | - F. S. Haddad
- University College London Hospitals, Ground
Floor, 250 Euston Road, London, NW1 2PG, UK
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Affiliation(s)
- K Osman
- Gibraltar Health Authority, Gibraltar
| | - P Momoh
- Gibraltar Health Authority, Gibraltar
| | - A Ruiz
- Gibraltar Health Authority, Gibraltar
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Almabhouh FA, Osman K, Siti Fatimah I, Sergey G, Gnanou J, Singh HJ. Effects of leptin on sperm count and morphology in Sprague-Dawley rats and their reversibility following a 6-week recovery period. Andrologia 2015; 47:751-8. [PMID: 25269426 DOI: 10.1111/and.12325] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/10/2014] [Indexed: 12/31/2022] Open
Abstract
Altered epididymal sperm count and morphology following leptin treatment has been reported recently. This study examined the effects of 42 days of leptin treatment on sperm count and morphology and their reversibility during a subsequent 56-day recovery period. Twelve-week-old male Sprague-Dawley rats were randomised into four leptin and four saline-treated control groups (n = 6). Intraperitoneal injections of leptin were given daily (60 μg Kg(-1) body weight) for 42 days. Controls received 0.1 ml of 0.9% saline. Leptin-treated animals and their respective age-matched controls were euthanised on either day 1, 21, 42 or 56 of recovery for collection of epididymal spermatozoa. Sperm concentration was determined using a Makler counting chamber. Spermatozoa were analysed for 8-hydroxy-2-deoxyguanosine and DNA fragmentation (Comet assay). Data were analysed using anova. Sperm concentration was significantly lower but fraction of abnormal spermatozoa, and levels of 8-hydroxy-2-deoxyguanosine were significantly higher in leptin-treated rats on day 1 of recovery. Comet assays revealed significant DNA fragmentation in leptin-treated rats. These differences were reduced by day 56 of recovery. It appears that 42 days of leptin treatment to Sprague-Dawley rats has significant adverse effects on sperm count and morphology that reverse following discontinuation of leptin treatment.
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Affiliation(s)
- F A Almabhouh
- Faculty of Medicine, Universiti Teknologi MARA, Selangor, Malaysia
| | - K Osman
- Faculty of Allied Health Sciences, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - I Siti Fatimah
- Faculty of Allied Health Sciences, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - G Sergey
- Faculty of Medicine, Universiti Teknologi MARA, Selangor, Malaysia
| | - J Gnanou
- Faculty of Medicine and Defence Health, National Defence University of Malaysia, Selangor, Malaysia
| | - H J Singh
- Faculty of Medicine, Universiti Teknologi MARA, Selangor, Malaysia
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Panagiotidou A, Meswania J, Osman K, Bolland B, Latham J, Skinner J, Haddad FS, Hart A, Blunn G. The effect of frictional torque and bending moment on corrosion at the taper interface : an in vitro study. Bone Joint J 2015; 97-B:463-72. [PMID: 25820883 DOI: 10.1302/0301-620x.97b4.34800] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The aim of this study was to assess the effect of frictional torque and bending moment on fretting corrosion at the taper interface of a modular femoral component and to investigate whether different combinations of material also had an effect. The combinations we examined were 1) cobalt-chromium (CoCr) heads on CoCr stems 2) CoCr heads on titanium alloy (Ti) stems and 3) ceramic heads on CoCr stems. In test 1 increasing torque was imposed by offsetting the stem in the anteroposterior plane in increments of 0 mm, 4 mm, 6 mm and 8 mm when the torque generated was equivalent to 0 Nm, 9 Nm, 14 Nm and 18 Nm. In test 2 we investigated the effect of increasing the bending moment by offsetting the application of axial load from the midline in the mediolateral plane. Increments of offset equivalent to head + 0 mm, head + 7 mm and head + 14 mm were used. Significantly higher currents and amplitudes were seen with increasing torque for all combinations of material. However, Ti stems showed the highest corrosion currents. Increased bending moments associated with using larger offset heads produced more corrosion: Ti stems generally performed worse than CoCr stems. Using ceramic heads did not prevent corrosion, but reduced it significantly in all loading configurations.
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Affiliation(s)
- A Panagiotidou
- University College London, Gower Street, London WC1E 6BT, UK
| | - J Meswania
- University College London, Gower Street, London WC1E 6BT, UK
| | - K Osman
- University College London Hospitals NHS Foundation Trust, 170 Tottenham Court Road, London W1T 7HA, UK
| | - B Bolland
- Musgrove Park Hospital, Taunton, Somerset, TA1 5DA, UK
| | - J Latham
- University Hospital Southampton NHS Foundation Trust, Tremona Road, Southampton, SO16 6YD, UK
| | - J Skinner
- Royal National Orthopaedic Hospital, Brockley Hill, Stanmore, Middlesex HA7 4LP, UK
| | - F S Haddad
- University College London Hospitals, 235 Euston Road, London NW1 2BU, UK
| | - A Hart
- Royal National Orthopaedic Hospital, Brockley Hill, Stanmore, Middlesex HA7 4LP, UK
| | - G Blunn
- University College London, Gower Street, London WC1E 6BT, UK
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Osman K, Abdellaoui B, Weyl B, Levêque J. Carcinosarcome utérin secondaire à un textilome vaginal : à propos d’un cas et revue de la littérature. ACTA ACUST UNITED AC 2013; 42:91-4. [DOI: 10.1016/j.jgyn.2012.09.008] [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] [Received: 02/18/2012] [Revised: 08/28/2012] [Accepted: 09/07/2012] [Indexed: 11/26/2022]
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16
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Nang CF, Osman K, Budin SB, Ismail MI, Jaffar FHF, Mohamad SFS, Ibrahim SF. Bovine serum albumin: survival and osmolarity effect in bovine spermatozoa stored above freezing point. Andrologia 2011; 44 Suppl 1:447-53. [DOI: 10.1111/j.1439-0272.2011.01203.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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17
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Elliott BM, Peti S, Lee D, Osman K, Isola LM, Scigliano E, Kostakoglu L. Use of combined FDG-PET and laboratory data for predicting relapse in multiple myeloma. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.8148] [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: 11/20/2022] Open
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Scigliano E, Grosskreutz C, Osman K, Malone A, Nieto J, Isola L. Rituximab And Sargramostim Immunotherapy Following Autologous Stem Cell Transplant For Aggressive Non-Hodgkin's Lymphoma. Biol Blood Marrow Transplant 2010. [DOI: 10.1016/j.bbmt.2009.12.167] [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: 11/29/2022]
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Malone A, Gudzowaty O, Grosskreutz C, Scigliano E, Osman K, Choo Y, Isola L. GVHD Followed By Full Myeloid And Lymphoid Donor Chimerism After Cadaveric Liver Transplantation. Biol Blood Marrow Transplant 2010. [DOI: 10.1016/j.bbmt.2009.12.480] [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: 10/19/2022]
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Grosskreutz C, Scigliano E, Osman K, Malone A, Nieto J, Isola L. Allogeneic Stem Cell Transplantation For T-Cell Lymphoma. Biol Blood Marrow Transplant 2010. [DOI: 10.1016/j.bbmt.2009.12.382] [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: 10/19/2022]
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Patkowska-Sokoła B, Dobrzański Z, Osman K, Bodkowski R, Zygadlik K. The content of chosen chemical elements in wool of sheep of different origins and breeds. Arch Anim Breed 2009. [DOI: 10.5194/aab-52-410-2009] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Abstract. The following chemical elements in sheep wool originating from Poland (Polish Mountain Sheep), Greece (Karagounico breed), and Syria (Awassi breed) were analysed: macroelements (Ca, P, Na, K, Mg, S), trace elements (Al, Ba, Co, Cu, Fe, Mn, Mo, Sr, Ti, Zn) and heavy metals (As, Cd Hg, Pb). Some statistically significant differences were observed between the content of the examined elements in sheep wool collected in the above countries. Sulphur, calcium, sodium and potassium were found in the highest amounts, while arsenic, cadmium and mercury occurred in the lowest quantity.
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Roberts NY, Osman K, Armstrong SJ. Telomere distribution and dynamics in somatic and meiotic nuclei of Arabidopsis thaliana. Cytogenet Genome Res 2009; 124:193-201. [PMID: 19556773 DOI: 10.1159/000218125] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2008] [Indexed: 11/19/2022] Open
Abstract
The ends of linear eukaryotic chromosomes are protected by the telomere, a specialised nucleoprotein complex. The primary role of the telomere is to protect the chromosome ends from being degraded or recognised and processed as double strand breaks. Additionally, the telomeres are involved in interphase chromosome organisation and also in chromosome pairing, synapsis and movement during meiotic prophase. The main emphasis of this review is concerned with the distribution and dynamics of the telomeres in the somatic cell and meiocytes of plants, focusing on the model plant Arabidopsis thaliana. In Arabidopsis the telomeres are organised around the nucleolus in both the somatic and meiotic interphase. One of the outstanding questions in meiosis is how homologous chromosomes pair (align) and synapse during meiotic prophase. Recent attention has been paid to the bouquet formation, a nearly universal event, during which the telomeres cluster on the nuclear membrane in early prophase. It has been suggested that because the telomeres are in close proximity this would enhance their pairing and subsequent synapsis of the homologues. In Arabidopsis we observe that the telomeres are paired homologously in early meiosis whilst still arranged around the nucleolus. They are moved to the nuclear membrane preceding synapsis and reveal only a loose clustering, which may represent a transient bouquet. On completion of synapsis the paired telomeres are dispersed and remain attached to the nuclear membrane until diplotene when they dissociate from the nuclear membrane. We also discuss the prospects for live imaging of the telomeres in Arabidopsis.
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Affiliation(s)
- N Y Roberts
- School of Biosciences, University of Birmingham, Birmingham, UK
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Osman K, Elliott B, Mandeli J, Scigliano E, Ross-Dodds V, Isola L, Grosskreutz C. Non-Myeloablative Conditioning and Allogeneic Transplantation for Multiple Myeloma. Biol Blood Marrow Transplant 2009. [DOI: 10.1016/j.bbmt.2008.12.221] [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: 11/29/2022]
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Stevens A, Hu C, Isola L, Scigliano E, Grosskreutz C, Osman K, Malone A, Del Toro G, Weintraub J. Intra-Arterial Steroids For Systemic Steroid Resistant Graft-Vs-Host Disease. Biol Blood Marrow Transplant 2009. [DOI: 10.1016/j.bbmt.2008.12.391] [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: 10/21/2022]
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Balkis Budin S, Othman F, Louis SR, Abu Bakar M, Radzi M, Osman K, Das S, Mohamed J. Effect of alpha lipoic acid on oxidative stress and vascular wall of diabetic rats. Rom J Morphol Embryol 2009; 50:23-30. [PMID: 19221642] [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: 05/27/2023]
Abstract
UNLABELLED PREMISES AND OBJECTIVES: Antioxidant plays an important role in preventing the progression of diabetes mellitus (DM) complications. The aim of the present study was to investigate the effect of alpha lipoic acid (ALA) supplementation on plasma lipid, oxidative stress and vascular changes in diabetic rats. MATERIAL AND METHODS Diabetes was induced by a single intravenous injection of streptozotocin (STZ) (50 mg/kg). The diabetic rats were divided into two groups: (i) supplemented group with ALA (100 mg/kg/day) and (ii) non-supplemented group without ALA. Non-diabetic rats (NDM) formed the control group, which received saline injection. RESULTS Following eight weeks of supplementation, fasting blood glucose (FBG) and glycosylated hemoglobin (HBA1c) in ALA-supplemented rats was found to be significantly lower than the non-supplemented group. ALA-supplementation also improved dyslipidemia that occurred in diabetic rats. ALA-supplementation also significantly increased plasma superoxide dismutase (SOD) activity and vitamin C level as compared to the No Suppl group. The increase in plasma and aorta malondealdehyde + 4-hydroxynonenal (MDA + 4-HNE) levels were also inhibited and the levels of oxidative DNA damage of peripheral lymphocytes were significantly reduced. Electron microscopic examination of thoracic aorta revealed that normal tissue organization was disrupted in STZ-diabetic rats with ALA-supplementation reducing the changes in the vascular morphology. CONCLUSIONS It is concluded that ALA has the potential in preventing the alteration of vascular morphology in diabetic rats probably through the improvement of glycemic status and dyslipidemia as well as its antioxidant activities.
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MESH Headings
- Animals
- Aorta, Thoracic/drug effects
- Aorta, Thoracic/pathology
- Aorta, Thoracic/physiopathology
- Aorta, Thoracic/ultrastructure
- Ascorbic Acid/blood
- Blood Glucose/metabolism
- Cholesterol/blood
- Diabetes Mellitus, Experimental/blood
- Diabetes Mellitus, Experimental/pathology
- Diabetes Mellitus, Experimental/physiopathology
- Glycated Hemoglobin/metabolism
- Male
- Muscle, Smooth, Vascular/drug effects
- Muscle, Smooth, Vascular/pathology
- Muscle, Smooth, Vascular/physiopathology
- Muscle, Smooth, Vascular/ultrastructure
- Oxidative Stress/drug effects
- Rats
- Rats, Sprague-Dawley
- Thioctic Acid/pharmacology
- Tunica Media/drug effects
- Tunica Media/pathology
- Tunica Media/physiopathology
- Tunica Media/ultrastructure
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Affiliation(s)
- Siti Balkis Budin
- Biomedical Department, Faculty of Allied Health Sciences, Universiti Kebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, Kuala Lumpur, Malaysia.
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Hotouras A, Rampaul R, Osman K, Varma A, Mathur D. Has the two-week straight to test protocol affected the T stage of the disease for colorectal cancer? Eur J Surg Oncol 2008. [DOI: 10.1016/j.ejso.2008.06.053] [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: 11/28/2022] Open
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Khan NA, Osman K, Goldsworthy GJ. Lysates of Locusta migratoria brain exhibit potent broad-spectrum antibacterial activity. J Antimicrob Chemother 2008; 62:634-5. [DOI: 10.1093/jac/dkn239] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Sanchez-Moran E, Osman K, Higgins J, Pradillo M, Cuñado N, Jones G, Franklin F. ASY1 coordinates early events in the plant meiotic recombination pathway. Cytogenet Genome Res 2008; 120:302-12. [DOI: 10.1159/000121079] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/26/2007] [Indexed: 11/19/2022] Open
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Osman K, Ibrahim S, Ismail M, Das S, Rahman MA, Othman A. 422. Data mining: relationship of sperm kinetics and DNA integrity. Reprod Fertil Dev 2008; 20:102. [DOI: 10.1071/srb08abs422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/02/2023] Open
Abstract
Intracytoplasmic sperm injection (ICSI) is a popular technique in treating infertile male that bypasses sperm natural selection. Due to this, the occasional and unintentional use of spermatozoa in ICSI with high amount of DNA fragmentation seems to be unpreventable. The objective of this study was to develop single sperm selection technique and in the process to determine the relationship between sperm kinetic parameters and sperm DNA damage. Semen from sexually matured male Boer buck cross species were collected and cryo-preserved. After taking into consideration semen sperm count, sperm were isolated individually in an ELISA plate by diluting semen in extender. Then every sperm’s kinetics was assessed by computer-assisted sperm analyzer (CASA) while neutral comet assay was used to quantitate and categorise its DNA damage condition. DNA damage was categorised from minimal damage (category 0) to extensive damage (category 4). Relationship between CASA parameters and DNA damage category of 490 sperms was determined using a Classification and Regression modelling (C&R). A total of 208 sperm data was used to generate a suitable C&R model. A further 250 sperm data was then used to determine accuracy of the model. Results obtained indicated that VSL, WOB and VCL were important factors in determining the overall condition of a particular sperm. A low value of VSL would indicate minimal DNA damage. Identification of higher category of DNA damage would require combination assessment of VSL, WOB and VCL. Accuracy of the developed C&R model was at 83.6%. Based on the above procedure it has been shown that sperm kinetics and DNA integrity can be considered together in selecting potential sperm for ICSI procedure.
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Grosskreutz C, Scigliano E, Osman K, Isola L. 295: Graft versus host disease after stem cell allotransplantation with low dose TBI, fludarabine and ATG. Biol Blood Marrow Transplant 2007. [DOI: 10.1016/j.bbmt.2006.12.300] [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: 10/23/2022]
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Al-Doghairi M, Al-Rehiayani S, Ibrahim G, Osman K. Physicochemical and Antimicrobial Properties of Natural Honeys Produced in Al-Qassim Region, Saudi Arabia. ACTA ACUST UNITED AC 2007. [DOI: 10.4197/met.18-2.1] [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] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Brunson CE, Abbud E, Osman K, Skelton TN, Markov AK. 285 OSBORN (J) WAVE APPEARANCE ON THE ELECTROCARDIOGRAM IN RELATION TO THE POTASSIUM TRANSFER AND MYOCARDIAL METABOLISM DURING HYPOTHERMIA. J Investig Med 2004. [DOI: 10.1136/jim-52-suppl1-838] [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: 11/04/2022]
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Osman K, Wemyss-Holden S, Miller A. A chylous rupture. J R Soc Med 2002. [PMID: 12461153 PMCID: PMC1279293 DOI: 10.1258/jrsm.95.12.616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Affiliation(s)
- K Osman
- Department of Surgery, University Hospitals of Leicester NHS Trust, Leicester Royal Infirmary, Leicester LE1 5WW, UK.
| | - S Wemyss-Holden
- Department of Surgery, University Hospitals of Leicester NHS Trust,
Leicester Royal Infirmary, Leicester LE1 5WW, UK
| | - A Miller
- Department of Surgery, University Hospitals of Leicester NHS Trust,
Leicester Royal Infirmary, Leicester LE1 5WW, UK
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Comenzo RL, Zhang Y, Martinez C, Osman K, Herrera GA. The tropism of organ involvement in primary systemic amyloidosis: contributions of Ig V(L) germ line gene use and clonal plasma cell burden. Blood 2001; 98:714-20. [PMID: 11468171 DOI: 10.1182/blood.v98.3.714] [Citation(s) in RCA: 176] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Primary systemic amyloidosis (AL) is a protein conformation disorder in which monoclonal immunoglobulin light chains produced by clonal plasma cells are deposited as amyloid in the kidneys, heart, liver, or other organs. Why patients with AL present with amyloid disease that displays such organ tropism is unknown. This study tested the hypothesis that both the light-chain variable region (Ig V(L)) germ line genes used by AL clones and the plasma cell burden influenced AL organ tropism. To assess the renal tropism of some light chains, an in vitro renal mesangial cell model of amyloid formation was used. With reverse transcription-polymerase chain reaction, Ig V(L) genes were sequenced from 60 AL patients whose dominant involved organs were renal (52%), cardiac (25%), hepatic (8%), peripheral nervous system (8%), and soft tissue and other (7%). Patients with clones derived from the 6a V(lambdaVI) germ line gene were more likely to present with dominant renal involvement, whereas those with clones derived from the 1c, 2a2, and 3r V(lambda) genes were more likely to present with dominant cardiac and multisystem disease. Patients with V(kappa) clones were more likely to have dominant hepatic involvement and patients who met the Durie criteria for myeloma (38%, 23 of 60) were more likely to present with dominant cardiac involvement independent of germ line gene use. In the in vitro model, unlike all other AL light chains tested, lambdaVI light chains formed amyloid rapidly both with and without amyloid-enhancing factor. These data support the hypothesis that germ line gene use and plasma cell burden influence the organ tropism of AL. (Blood. 2001;98:714-720)
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Affiliation(s)
- R L Comenzo
- Division of Hematologic Oncology, Department of Medicine, Memorial Sloan-Kettering Cancer Center, 1275 York Ave., New York, NY 10021, USA.
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Abstract
OBJECTIVES To evaluate interactions between toxic and essential elements in the mother-fetus relationship and possible predictors of trace element concentrations in placenta and cord blood. DESIGN AND METHODS A group of 106 Swedish women was investigated for concentrations of cadmium, lead, and several essential elements in placenta as well as cadmium, lead, zinc, and selenium in venous blood collected at gestational week (gw) 36 and umbilical cord blood. Relations between these elements and maternal and child's characteristics were examined. RESULTS The concentrations of cadmium in placenta ranged from 10 to 170 nmol/kg, with the median value (Md) being 46 nmol/kg. Cord blood cadmium (Md of 0.19 nmol/L) was only about 10% of that in maternal blood. Smokers had significantly higher cadmium concentrations in blood (p < 0.001) and placenta (p = 0.001) than non-smokers. The median placental concentration of lead was 26 nmol/kg (range 0-630 nmol/kg). The lead levels in cord blood (Md of 54 nmol/L) were almost the same as in maternal blood. Statistically significant negative associations were found between cord blood lead, on one hand, and child's weight, length, and head circumference, on the other. The placental levels (medians and ranges) of the essential elements (micromol/kg) were 160 (120-280) for zinc, 2.4 (2.0-3.3) for selenium, 15 (10-20) for copper, 0.084 (0.02-0.32) for cobalt, 0.055 (0.03-0.12) for molybdenum, and 1.2 (0. 65-5.1) for manganese, respectively. Several of the essential elements in placenta correlated significantly with each other. Multiparous mothers had significantly lower concentrations of zinc (p = 0.002) and selenium (p = 0.049) in serum as well as zinc (p = 0. 001) and calcium (p = 0.004) in placenta than nulliparous ones. Also, cord blood zinc decreased with parity. CONCLUSIONS The results showed that lead, but not cadmium crossed easily the placental barrier. There were no negative effects of cadmium on the zinc status. Cord blood lead, on the other hand, was a negative predictor of child's birth weight, length and head circumference, indicating that lead might have negative influence on growth in children even at very low exposure levels. There was a depletion of maternal stores of essential elements with increasing parity.
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Affiliation(s)
- K Osman
- Institute of Environmental Medicine, Division of Metals and Health, Karolinska Institutet, Stockholm, Sweden.
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Abstract
The objective of the study was to investigate the relationship between lead exposure and hearing in children in the Katowice region, an industrial area in Poland. Blood lead was determined using inductively coupled plasma mass spectrometry, with appropriate quality control. The concentrations of lead in blood (B-Pb) in 155 children, aged 4-14, ranged from 19 to 281 microg/L (0.09 to 1.4 micromol/L), with a median of 72 microg/L (0.34 micromol/L). The hearing thresholds increased significantly with increasing blood lead levels at all investigated frequencies (0.5, 1, 2, 4, 6, and 8 kHz). The relationship also remained significant for B-Pb below 100 microg/L (0.48 micomol/L; n=107). The brainstem auditory evoked potential latency of wave I was significantly increased (also after adjustment for age) in the group of children with the highest blood lead levels (B-Pb above 100 microg/L, 0.48 micromol/L; n=51), compared to the group with the lowest ones (B-Pb below 46 microg/L, 0.22 micromol/L; n=51). The audiometric results clearly indicate that auditory function in children is impaired at a blood lead concentration even below 100 microg/L (0.5 micromol/L).
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Affiliation(s)
- K Osman
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, S-171 77, Sweden
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Abstract
OBJECTIVES To determine the influence of the essential element status on blood concentrations of lead and other toxic metals. DESIGN AND METHODS A group of 157 children from Katowice, an industrial area in Poland, was investigated for concentrations of lead and cadmium in whole blood, and mercury, selenium, zinc, copper, and magnesium in whole blood and serum. Relations between these elements, serum ferritin, hematological parameters, as well as serum selenoprotein P and glutathione peroxidase (GSH-px) were examined. Conversion factors for element concentrations (mumol to microgram): lead 207.19, cadmium 112.41, mercury 200.59, selenium 78.96, magnesium 24.31, copper 63.55, and zinc 65. RESULTS Blood lead was negatively associated with concentrations of selenium in whole blood and serum as well as selenoprotein P and glutathione peroxidase in serum. The association was mainly apparent at low blood lead concentrations, which may indicate an influence of selenium on the kinetics of lead, rather than an effect of lead on the selenium status. Children with low serum ferritin levels had statistically higher blood cadmium levels and a tendency for higher blood lead levels, indicating increased gastrointestinal absorption of these metals at reduced iron stores. Blood lead was negatively correlated with mean corpuscular hemoglobin concentration, which may reflect the effect of lead on hemoglobin synthesis. There was an association between blood mercury and selenium, indicating a common source of intake through fish consumption. CONCLUSIONS The results indicate that selenium and iron status may influence the kinetics of lead.
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Affiliation(s)
- K Osman
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden.
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Osman K, Zejda JE, Schütz A, Mielzynska D, Elinder CG, Vahter M. Exposure to lead and other metals in children from Katowice district, Poland. Int Arch Occup Environ Health 1998; 71:180-6. [PMID: 9591159 DOI: 10.1007/s004200050268] [Citation(s) in RCA: 29] [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] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
OBJECTIVES To assess the exposure to toxic metals and to evaluate its possible association with essential elements and socioeconomic status in children from the town of Bytom in the Katowice area; this area is one of the most polluted industrialized regions in Poland. METHODS Concentrations of lead, cadmium, mercury, selenium, magnesium, copper, and zinc were determined in whole blood of 211 children aged 9 years. The samples were analyzed using inductively coupled plasma mass spectrometry (ICP-MS). Information on socioeconomic factors was collected using questionnaires. Concentrations of trace elements in the blood of 24 Swedish children aged 9-10 years were used for comparisons. RESULTS The concentrations of lead detected in the blood of the Polish children ranged from 0.09 to 1.9 mumol/l, with the median value being 0.27 mumol/l. Statistically significant associations were found between lead and such socioeconomic factors as the number of siblings, trips outside the region, maternal smoking, playing outdoors, and apartment standard. The average blood lead level was about 3 times higher in the Polish children than in the Swedish group. The median blood concentration of cadmium found in the Polish children was 3.4 nmol/l (range 1.1-41 nmol/l; almost 3 times higher than that detected in the Swedish children), and that of mercury was 3 nmol/l (range 0.5-11 nmol/l). The median blood levels and ranges of the essential elements were 1.1 (0.7-2.0) mumol/l for selenium, 1.5 (1.2-1.9) mmol/l for magnesium, 17 (13-22) mumol/l for copper, and 78 (54-104) mumol/l for zinc, respectively. The concentrations of selenium and magnesium were significantly lower in the Polish group as compared with the Swedish children. CONCLUSIONS In all, 7% of the Polish children had blood lead levels exceeding 0.5 mumol/l, the concentration above which negative effects on mental development have been reported. However, the findings indicate a decrease in lead exposure during recent years among the Bytom children.
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Affiliation(s)
- K Osman
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden.
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Affiliation(s)
- J V deGiovanni
- Department of Cardiology, City Hospital, Birmingham, England
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Sanyal RS, Roychoudhury D, Nanda NC, Kim KS, Osman K. Transthoracic and transesophageal echocardiographic diagnosis of severe subaortic obstruction produced by an abscess cavity. Am Heart J 1994; 128:1252-5. [PMID: 7985613 DOI: 10.1016/0002-8703(94)90763-3] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- R S Sanyal
- Division of Cardiovascular Disease, University of Alabama, Birmingham 35233
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Perez Lasala G, Wright T, Osman K, Siouffi S, Skelton TN, Lehan PH, Markov AK. Plasma oxidase assay for screening of myocardial infarction. Am J Med Sci 1994; 308:157-61. [PMID: 8074131 DOI: 10.1097/00000441-199409000-00006] [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: 01/28/2023]
Abstract
The availability of techniques such as surgical reperfusion, angioplasty, and thrombolysis for the treatment of acute myocardial infarction (AMI) has revived interest in seeking an early detectable biochemical marker diagnostic for AMI. Therefore, we investigated whether an unidentified oxidase that is released by activated neutrophils at the onset of AMI could be used as an early diagnostic assay. The conversion by plasma oxidase of 1 microM of adrenaline to 1 microM of adrenochrome represents the plasma oxidase activity (POA) of 1 U/L. Fifty patients suspected of having AMI, 40% of whose electrocardiograms were nondiagnostic for AMI, were admitted to the coronary care unit, and venous blood samples were obtained for determination of the POA and creatine phosphokinase-MB levels. Healthy volunteers (n = 12) served as control subjects, and 8 patients with pneumonia whose leukocyte counts were greater than 15,000 microL were included in the study. In those with AMI (n = 22), as determined by serial creatine phosphokinase-MB, the mean POA (+/- standard error of the mean) was 233 +/- 13 U/L, and in those with angina and no AMI (n = 28) was 127 +/- 5 U/L (P < 0.0001). In the control group, mean POA (+/- standard error of the mean) was 84 +/- 5 U/L (control versus angina; P < 0.01) and for those with infection was 214 +/- 10 U/L. At admission, the creatine phosphokinase-MB was diagnostic for only 12 of the 22 patients with AMI (sensitivity rate of 54%), whereas in 21 of those patients, the POA values were diagnostic for AMI (sensitivity rate of 95%).(ABSTRACT TRUNCATED AT 250 WORDS)
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Ahmed AE, Jacob S, Soliman S, Ahmed N, Osman K, Loh JP, Romero N. Whole-body autoradiographic disposition, elimination and placental transport of [14C]tri-o-cresyl phosphate in mice. J Appl Toxicol 1993; 13:259-67. [PMID: 8376726 DOI: 10.1002/jat.2550130408] [Citation(s) in RCA: 11] [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: 01/30/2023]
Abstract
Tri-o-cresyl phosphate (TOCP) is used commercially as a plasticizer and flame retardant. The disposition, metabolism, elimination and transplacental uptake of [phenyl-U-14C]TOCP and/or its metabolites, in pregnant and non-pregnant mice, were examined. Pregnant (18th-day gestation) and non-pregnant, ICR mice were given an i.v. dose of [14C]TOCP (557 microCi kg-1; Specified activity 4.83 microCi mumol-1). At various time intervals (1, 24, 48 and 72 h) the animals were processed for whole-body autoradiography (WBA). Over 72 h the non-pregnant mice excreted 55% of the 14C in the urine and 9% in the feces, while excretion in the urine and feces by the pregnant mice was 50% and 9% of the total dose, respectively. The WBA and its computer-assisted image analysis indicated extensive distribution of the 14C label originally dosed as [14C]TOCP in pregnant mice and their fetuses. The retention of radioactivity in organs such as lung, spleen, gall-bladder and liver of mother and its fetuses suggest that these are the target sites of TOCP toxicity. The distribution in non-pregnant and pregnant mice and in the fetal tissues followed a similar pattern in uptake and retention until 72 h. Brain and spinal cord had the least amount of [14C]TOCP. This finding may support reports that explain the insensitivity of the mice towards organophosphate-induced delayed neurotoxicity (OPIDN) of TOCP.
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Affiliation(s)
- A E Ahmed
- Department of Pathology, University of Texas Medical Branch, Galveston 77555-0605
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Osman K. Percutaneous balloon angioplasty for the coarctation of the aorta in neonates and children. Radiogr Today 1990; 56:14-7. [PMID: 2148678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- K Osman
- Riyadh Armed Forces Hospital, Saudi Arabia
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Abstract
Cytochemical localization of acetylcholinesterase (AChE) in cat retina showed reactivity in at least two types of amacrine cell and in essentially all of the cells in the ganglion-cell layer. Reaction product was present throughout the inner plexiform layer (IPL) with heavier accumulations forming bands at 0-6% and 64-78% depth levels. All of the reactivity was abolished by incubation with BW 284c51, a specific inhibitor of AChE. After pretreatment of animals with diisopropylfluorophosphate, new enzyme was synthesized by both amacrine and ganglion cells. In contrast, choline acetyltransferase immunoreactivity was limited to matching subpopulations of amacrine (A14) and displaced amacrine (dA14) cells, ramifying narrowly at 20% and 49% depth levels within the IPL. Combined localization of both enzymes in the same tissue confirmed the presence of AChE in cholinergic cells. However, the greatest concentration of AChE in the IPL was in strata not receiving direct cholinergic input. These findings affirm that AChE is not a reliable marker for either cholinergic or cholinoceptive neurons. The distribution of AChE in the cat retina suggests that this enzyme may participate in functions not directly related to cholinergic neurotransmission.
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Abstract
Golgi studies of cat retina have revealed the presence of matching subpopulations of starburst-like amacrine and displaced amacrine cells that are morphologically similar to the cholinergic cells of rabbit retina. The displaced amacrines appear identical with the A14 cells described by Kolb et al. (Kolb, Nelson, and Mariani: Vision Res. 21:1081-1114, 1981). In order to determine whether these cells may be cholinergic, we carried out autoradiography to localize newly synthesized (3H)acetylcholine and immunocytochemistry to demonstrate the distribution of choline acetyltransferase. Autoradiographs showed labeling in somas of both amacrine and displaced amacrine cells. Choline acetyltransferase was found in amacrine cells that ramify in sublamina a of the inner plexiform layer and in displaced amacrine cells ramifying in sublamina b. The pattern of cholinergic neurons in the cat is similar to that in other vertebrates and suggests that acetylcholine may play an important and consistent role in retinal function.
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Selim SA, Soliman R, Osman K, Padhye AA, Ajello L. Studies on histoplasmosis farciminosi (epizootic lymphangitis) in Egypt. Isolation of Histoplasma farciminosum from cases of histoplasmosis farciminosi in horses and its morphological characteristics. Eur J Epidemiol 1985; 1:84-9. [PMID: 3842362 DOI: 10.1007/bf00141797] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Isolation of Histoplasma farciminosum from five horses, showing typical signs of histoplasmosis farciminosi (epizootic lymphangitis) was successfully attempted. The mycelial form of H. farciminosum was isolated on Sabouraud dextrose agar enriched with 2.5% glycerol, brain heart infusion (BHI) agar enriched with 10% horse blood and PPLO dextrose glycerol agar. The last medium proved to be the most effective, both for primary isolation and subculturing of the fungus. It was found that on primary isolation, the lag phase of the mycelial form of the fungus was relatively long, involving 4-8 weeks at 25 degrees C. Colonies of the mycelial form of H. farciminosum appeared on subculture as a yellowish, light brown to deep brown, convoluted, waxy, cauliflower-like growth tending to form scant aerial growth. Conversion of the mycelial form to the yeast form of H. farciminosum was successful by subculturing either on BHI agar with 5% blood or on Pine's medium and incubating at 35-37 degrees C. Complete conversion to the yeast form was achieved only after 4-5 repeated serial transfers onto fresh media every 8 days. The yeast colonies were flat, raised, slightly or deeply wrinkled, white to light gray to grayish brown, and were pasty in consistency.
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Abdel-Ghani M, Abdel-Hamed S, Nada SM, Osman K. Identification of species and biotypes of the brucella genus in apparently healthy and aborted ewes and goats in Egypt. Int J Zoonoses 1984; 11:139-44. [PMID: 6534898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Brucella micro-organisms was absent in the vaginal swabs collected from apparently healthy ewes. Such incidence among the genital tract of aborted ewes was 4.84%. Among goats, brucella species represented 7.04% in aborted goats, while it was recovered in lower percentage (0.92%) from the vaginal swabs of apparently healthy goats. Br. melitensis biotype "3" was the sole species recovered from aborted ewes, while biotypes "3" and "2" could be obtained from clinically healthy and aborted foeti of goats. The predilection seats of brucella in the genital tracts of aborted animals and their foeti were discussed in details.
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Abd-el-Ghani M, Osman K, Nada SM. Evaluation of serodiagnostic methods for brucellosis among sheep and goats in Egypt. Int J Zoonoses 1983; 10:132-7. [PMID: 6427127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
A total of 1246 animals (778 sheep and 468 goats) were examined for detection of brucellosis using serum tube agglutination test (SAT), complement fixation test (CFT) as well as Abortus Bang Ring test (ABR-test) have been conducted on both dairy ewes and goats. Eighteen ovine sera played positive serum agglutination reactions (2.31%). Out of the total 468 goat's serum samples examined, 22 (4.70%) gave a positive titers and 2 (0.43%) gave doubtful reactions. The reactors of sheep to the CFT was 2.44% and the incidence was lower in rams (1.63%) than among ewes (2.97%). Seven out of the 339 ewe's milk samples were positive to ABR-test (2.06%), 7 were doubtful (2.06%). Out of 354 goat's milk samples examined, 14 were positive to ABR-test (3.96%). CFT was considered to be a reliable procedure for detecting brucella infected animals particularly in male more than the SAT. Among dairy ewes, both tests were identical in their results.
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Atef M, Ghani MA, Niazi ZM, Youssef SA, Osman K. [Antibiotic sensitivity of various atypical mycobacteria in vitro]. Dtsch Tierarztl Wochenschr 1982; 89:403-6. [PMID: 6756859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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