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Jahani M, Akaberi M, Heidari T, Kamali H, Nejabat M, Rajabi O, Hadizadeh F. Simultaneous determination of mometasone furoate and calcipotriol in a binary mixture by validated HPLC and chemometric-assisted UV spectrophotometric methods and identification of degradation products by LC-MS. Iran J Basic Med Sci 2023; 26:37-47. [PMID: 36594065 PMCID: PMC9790053 DOI: 10.22038/ijbms.2022.65436.14396] [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] [Figures] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Accepted: 10/19/2022] [Indexed: 01/04/2023]
Abstract
Objectives A new binary mixture containing mometasone furoate (MF) and calcipotriol (CP) is suggested to manage psoriasis; since the combined stability profile of these drugs is poorly understood. Materials and Methods Herein MF, CP, and their mixtures were subjected to various stress conditions. Also, stability-indicating HPLC was developed and validated according to ICH guidelines with Box-Behnken design. The degradation products (DPs) were predicted in silico and identified using LC-MS. The bioactivity and toxicity of DPs were studied using molecular docking and alamarBlue assay, respectively. Spectroscopic techniques of the first derivative, first-derivative ratio, and the mean-centering of ratio spectra were also used to determine MF and CP in the mixture because of spectra overlapping. Results The major degradants for MF in alkaline conditions were DP1, DP2, and DP3, while in thermal and UV conditions, only DP1 was generated. CP gave one degradant in all conditions. No new impurity was observed in the MF and CP mixtures. The results of spectrophotometry showed good linearity in the range of 4-50 and 2-20 µg/ml, while linearity for HPLC was in the range of 4-50 and 0.5-2.5 µg/ml for MF and CP, respectively. Recovery was 99.61-100.38% for UV and 100.4% for HPLC methods of MF and 100.6-101.4% for UV and 99.5% for HPLC methods of CP. Conclusion The developed methods can be used as simple, accurate, precise, and rapid techniques for routine quality control of MF and CP mixtures.
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Affiliation(s)
- Maryam Jahani
- Department of Pharmaceutical Control, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Maryam Akaberi
- Department of Pharmacognosy, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Tahereh Heidari
- Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Hossein Kamali
- Department of Pharmaceutics, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mojgan Nejabat
- Department of Medicinal Chemistry, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Omid Rajabi
- Department of Pharmaceutical Control, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran,Corresponding authors: Omid Rajabi. Department of Pharmaceutical Control, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran. ; Farzin Hadizadeh. Biotechnology Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran.
| | - Farzin Hadizadeh
- Biotechnology Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran,Corresponding authors: Omid Rajabi. Department of Pharmaceutical Control, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran. ; Farzin Hadizadeh. Biotechnology Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran.
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Kianmehr S, Jahani M, Moazzen N, Ahanchian H, Khameneh B. The potential of probiotics for treating skin disorders: A concise review. Curr Pharm Biotechnol 2022; 23:1851-1863. [PMID: 35410594 DOI: 10.2174/1389201023666220411090301] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 01/04/2022] [Accepted: 01/26/2022] [Indexed: 11/22/2022]
Abstract
Probiotics are defined as "live microorganisms that, when administered in adequate amounts, confer a health benefit on the host". In recent years, the cosmetic industries have tried to develop a number of products classified as probiotics. They can exert their benefits at the skin level because of their favorite properties, and they could prevent and treat skin diseases and represent an emerging area for skin health. The antibacterial and immunomodulatory properties make them promising candidates to target skin disorders including acne, psoriasis, and atopic dermatitis and aid wound healing. The scientific reports show that specific probiotic strains can modulate cutaneous microflora, skin immune system, lipid barrier, and finally, skin health preservation. This review summarizes the most relevant evidence from scientific literature concerning potential topical applications of probiotics in dermatology. Altogether, the evidence reported here affords the possibility of designing new strategies based on a topical approach to prevent and treat cutaneous disorders..
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Affiliation(s)
- Shadi Kianmehr
- School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Maryam Jahani
- Department of Pharmaceutical Control, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Nasrin Moazzen
- Clinical Research Development Unit of Akbar hospital, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Hamid Ahanchian
- Clinical Research Development Unit of Akbar hospital, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Bahman Khameneh
- Department of Pharmaceutical Control, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
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Jahani M, Fazly Bazzaz BS, Akaberi M, Rajabi O, Hadizadeh F. Recent Progresses in Analytical Perspectives of Degradation Studies and Impurity Profiling in Pharmaceutical Developments: An Updated Review. Crit Rev Anal Chem 2022; 53:1094-1115. [PMID: 35108132 DOI: 10.1080/10408347.2021.2008226] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/21/2023]
Abstract
Forced degradation studies have been used to simplify analytical methodology development and achieve a deeper knowledge about the inherent stability of active pharmaceutical ingredients (API) and drug products. This provides insight into degradation species and pathways. Identification of impurities in pharmaceutical products is closely related to the selection of the most appropriate analytical methods like HPLC-UV, LC-MS/MS, LC-NMR, GC-MS, and capillary electrophoresis. Herein, recent trends in analytical perspectives during 2018-April 14, 2021, are discussed based on forced and impurity degradation profiling of pharmaceuticals. Literature review showed that several methods have been used for experimental design and analysis conditions such as matrix type, column type, mobile phase, elution modes, detection wavelengths, and therapeutic category. Thus, since these factors influence the separation and identification of the impurities and degradation products, we attempted to perform a statistical analysis for the developed methods according to the abovementioned factors.
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Affiliation(s)
- Maryam Jahani
- Department of Pharmaceutical Control, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Bibi Sedigheh Fazly Bazzaz
- Department of Pharmaceutical Control, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
- Biotechnology Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Maryam Akaberi
- Department of Pharmacognosy, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Omid Rajabi
- Department of Pharmaceutical Control, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Farzin Hadizadeh
- Biotechnology Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran
- Department of Pharmacognosy, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
- Department of Medicinal Chemistry, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
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Davoodi J, Majidi S, Jahani M, Tayarani-Najaran Z, Golmohammadzadeh S, Kamali H. Implementation of design of experiments for optimization of forced degradation conditions and development of a stability-indicating high-performance liquid chromatography method for sepiwhite. J Sep Sci 2021; 44:4299-4312. [PMID: 34669262 DOI: 10.1002/jssc.202100388] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 09/21/2021] [Accepted: 10/04/2021] [Indexed: 12/21/2022]
Abstract
Sepiwhite is a novel anti-pigmenting agent that is derived from fatty acid and phenylalanine and used for hyperpigmentation induced by light exposure or inflammation. In this study, a simple and validated high-performance liquid chromatography method for the quantitation of sepiwhite was developed. Optimized forced degradation of sepiwhite at thermal, acid/base, photolysis, oxidative, and heavy metal ions conditions were evaluated and the effect of each of them on production of specific 10%-30% degradants was studied by the approach of design of experiments. Sepiwhite accelerated study was conducted and toxicity of sepiwhite at each condition was tested. An optimized high-performance liquid chromatography method was validated by a face-centered central composition design. Ten different degradants were identified from sepiwhite and degradation behavior under different conditions was studied. Sepiwhite and its degradant products show no cytotoxicity. This optimized high-performance liquid chromatography method can be applied for quality control assay and sepiwhite degradation behavior may be considered in the manufacturing of sepiwhite products.
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Affiliation(s)
- Javid Davoodi
- Department of Pharmaceutics, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran.,Student Research Committee, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Sina Majidi
- Student Research Committee, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Maryam Jahani
- Department of Pharmaceutical Control, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Zahra Tayarani-Najaran
- Department of Pharmacodynamics and Toxicology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Shiva Golmohammadzadeh
- Department of Pharmaceutics, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran.,Nanotechnology Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Hossein Kamali
- Department of Pharmaceutics, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran.,Targeted Drug Delivery Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran
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Kazemi S, Asadi F, Barari L, Morakabati P, Jahani M, Kani SNM, Soorani F, Kolangi F, Memariani Z. Quantification of Flavonoids in Alpinia officinarum Hance. via HPLC and Evaluation of its Cytotoxicity on Human Prostate Carcinoma (LNCaP) and Breast Carcinoma (MCF-7) Cells. Anticancer Agents Med Chem 2021; 22:721-730. [PMID: 34229591 DOI: 10.2174/1871520621666210706142157] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 11/09/2020] [Accepted: 12/05/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND Various plant species have been shown to be effective in prevention or adjuvant therapy of cancer. Alpinia officinarum and its main phytochemicals have also been the subject of several studies for their anti-cancer properties. OBJECTIVE The objective of this study is to analyze the extracts of A. officinarum to quantify flavonoids, and to evaluate the growth inhibitory effects of the extracts on MCF-7 and LNCaP cells. METHODS A. officinarum aqueous and hydroalcoholic extracts were analyzed using high-performance liquid chromatography (HPLC) for quantification of three flavonoid compounds. Then MCF-7, LNCaP, and fibroblast cells were treated with several concentrations (25, 50, 100, 200, and 400 μg/mL) of extracts (24, 48 and 72h). Cell viability was assessed using MTT assay. Flow cytometry was conducted to evaluate apoptosis. RESULTS Galangin and kaempferol (3.85 and 1.57 mg/g dry extract) were quantified respectively in hydroalcoholic and aqueous extracts using a validated method. The hydroalcoholic extract significantly decreased the viability of MCF-7 (IC50: 43.45μg/mL for 48h) and LNCaP cells (IC50: 168μg/mL for 48h). The aqueous extract reduced cancer cell viability by more than 50% only at 200 and 400 μg/mL (72h). Treatment of primary fibroblasts with both extracts showed no significant decrease in cell viability (25-100 μg/mL; 24 and 48h). The hydroalcoholic extract induced a significant increase in apoptotic cells in both MCF-7 and LNCaP cells. CONCLUSION Obtained results demonstrated the cytotoxicity of A. officinarum through apoptosis induction in two cancer cell lines. Further investigations are required to determine the underlying apoptotic cell death mechanisms induced by A. officinarum in cancerous cells.
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Affiliation(s)
- Sohrab Kazemi
- Cellular and Molecular Biology Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran
| | - Farideh Asadi
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Ladan Barari
- Cellular and Molecular Biology Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran
| | - Payam Morakabati
- Cellular and Molecular Biology Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran
| | - Maryam Jahani
- Department of Pharmaceutical Control, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Seyede Narges Mousavi Kani
- Cellular and Molecular Biology Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran
| | - Farangiz Soorani
- Department of Pharmacology, Faculty of Medicine, Babol University of Medical Sciences, Babol, Iran
| | - Fatemeh Kolangi
- Department of Traditional Medicine, School of medicine, Golestan University of Medical Sciences, Gorgan, Iran
| | - Zahra Memariani
- Traditional Medicine and History of Medical Sciences Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran
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Ghavamzadeh A, Alimoghaddam K, Jalili M, Mousavi SA, Bahar B, Kasaeian A, Hamidieh AA, Behfar M, Vaezi M, Jalali A, Jahani M. Peripheral blood versus bone marrow transplant in patients with aplastic anemia, an unresolved issue. Bone Marrow Transplant 2016; 51:1628-1630. [PMID: 27668763 DOI: 10.1038/bmt.2016.235] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- A Ghavamzadeh
- Hematology-Oncology and Stem Cell Transplantation Research Center/Tehran University of Medical Sciences, Tehran, Iran
| | - K Alimoghaddam
- Hematology-Oncology and Stem Cell Transplantation Research Center/Tehran University of Medical Sciences, Tehran, Iran
| | - M Jalili
- Hematology-Oncology and Stem Cell Transplantation Research Center/Tehran University of Medical Sciences, Tehran, Iran
| | - S A Mousavi
- Hematology-Oncology and Stem Cell Transplantation Research Center/Tehran University of Medical Sciences, Tehran, Iran
| | - B Bahar
- Hematology-Oncology and Stem Cell Transplantation Research Center/Tehran University of Medical Sciences, Tehran, Iran
| | - A Kasaeian
- Hematology-Oncology and Stem Cell Transplantation Research Center/Tehran University of Medical Sciences, Tehran, Iran.,Non-communicable Diseases Research Center, Endocrinology & Metabolism Population Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - A A Hamidieh
- Hematology-Oncology and Stem Cell Transplantation Research Center/Tehran University of Medical Sciences, Tehran, Iran
| | - M Behfar
- Hematology-Oncology and Stem Cell Transplantation Research Center/Tehran University of Medical Sciences, Tehran, Iran
| | - M Vaezi
- Hematology-Oncology and Stem Cell Transplantation Research Center/Tehran University of Medical Sciences, Tehran, Iran
| | - A Jalali
- Tehran University of Medical Sciences, Tehran, Iran
| | - M Jahani
- Hematology-Oncology and Stem Cell Transplantation Research Center/Tehran University of Medical Sciences, Tehran, Iran
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Ali Moghaddam K, Vaezi M, Karimi A, Jahani M, Namroud N, Ghavamzadeh A. Post-HSCT Fertility in Patients Receiving Non-TBI-Based Conditioning Regimen: A 23-Year of Iranian Experience. Biol Blood Marrow Transplant 2015. [DOI: 10.1016/j.bbmt.2014.11.259] [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: 11/30/2022]
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Sadeghi S, Jahani M. Solid-Phase Extraction of Florfenicol from Meat Samples by a Newly Synthesized Surface Molecularly Imprinted Sol–Gel Polymer. FOOD ANAL METHOD 2014. [DOI: 10.1007/s12161-014-9849-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Ghavamzadeh A, Alimoghaddam K, Jahani M, Mousavi S, Bahar B, Iravani M, Ghaffari F, Jalili M, Jalali A. Autologous and Allogenic Stem Cell Transplantation Results in Multiple Myeloma Patients – Single Center Study. Biol Blood Marrow Transplant 2012. [DOI: 10.1016/j.bbmt.2011.12.245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Ghavamzadeh A, Hoghooghi M, Jahani M, Alimoghaddam K, Mousavi S, Bahar B, Iravani M, Jalili M, Jalali A. Effect of Pre-Transplant Chemotherapy Before Human Leukocyte Antigen Identical Sibling Transplantation for Acute Myelogenous Leukemia in First Complete Remission. Biol Blood Marrow Transplant 2012. [DOI: 10.1016/j.bbmt.2011.12.513] [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]
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Saddadi F, Najafi I, Hakemi M, Jahani M, Ali Moghadam K, Ghavamzadeh A, Soleimanian T, Perkowska-Ptasinska A, Wagrowska-Danilewicz M, Danilewicz M, Halon A, Komuda E, Karkoszka H, Andrzejewska A, Okon K, Kurnatowska I, Krasnicka M, Hryszko T, Kusztal M, Wiechecka-Korenkiewicz J, Marcinkowska E, Korenkiewicz J, Marszalek A, Sypniewska G, Manitius J, Cappuccino L, Verzola D, Tosetti F, Marre S, Villaggio B, Salvidio G, Garibotto G, Pasquariello A, Innocenti M, Pasquariello G, Mattei P, Samoni S, Sami N, Cupisti A, Malvar B, Viana H, Galvao M, Carvalho F, Oksa A, Demes M, Danis D, Hilhorst M, van Paassen P, van Breda Vriesman P, Cohen Tervaert JW, Perkowska-Ptasinska A, Ciszek M, Urbanowicz A, Kwiatkowski A, Durlik M, Saito T, Kawano M, Saeki T, Nishi S, Yamaguchi Y, Hisano S, Nakashima H, Yamanaka N, Oh SW, Chin HJ, Na KY, Chae DW, Ozkan G, Ulusoy S, Ersoz S, Orem A, Alkanat M, Yucesan F, Kaynar K, Al S, Simic Ogrziovic S, Bojic S, Basta Jovanovic G, Kotur Stevuljevic J, Dosaj V, Lezaic V, Yagisawa T, Kimura T, Ishikawa N, Yashi M. Renal histopathology. Clin Kidney J 2011. [DOI: 10.1093/ndtplus/4.s2.36] [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: 11/15/2022] Open
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Ghavamzadeh A, Alimoghaddam K, Hamidieh A, Jalili M, Bahar B, Iravani M, Mousavi S, Jahani M. Peripheral Blood Stem Cell Transplantation Versus Bone Marrow Transplantation in Severe Aplastic Anemia. Biol Blood Marrow Transplant 2011. [DOI: 10.1016/j.bbmt.2010.12.416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Alimoghaddam K, Jahani M, Mousavi S, Bahar B, Iravani M, Hamidieh A, Jorjani H, Jalali A, Ghavamzadeh A. Hematopoietic Stem Cell Transplantation in Lymphoma Patients: the Iranian Experience. Biol Blood Marrow Transplant 2011. [DOI: 10.1016/j.bbmt.2010.12.300] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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14
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Ghavamzadeh A, Alimoghaddam K, Ghaffari S, Rostami S, Jahani M, Iravani M, Mousavi S, Jalili M, Alizadeh N, Khodabandeh A. Results of new cases of APL treatment by arsenic trioxide and long-term follow-up: Is it time for using arsenic trioxide in first-line treatment? J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.6545] [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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Ghavamzadeh A, Alimoghaddam K, Jahani M, Hamidieh A, Mousavi S, Khatami F, Jalali A, Alimohammadi A. Hematopoietic Stem Cell Transplantation For Major Thalassemia: Nineteen Years Experience In Iran. Biol Blood Marrow Transplant 2010. [DOI: 10.1016/j.bbmt.2009.12.024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Ghavamzadeh A, Hamidieh A, Jahani M, Alimoghaddam K, Iravani M, Mousavi S, Bahar B, Khodabandeh A, Jalili M. HLA-Matched Related Donor Hematopoietic Stem Cell Transplantation In 36 Pediatric Patients With Severe Acquired Aplastic Anaemia. Biol Blood Marrow Transplant 2010. [DOI: 10.1016/j.bbmt.2009.12.286] [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: 11/24/2022]
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Ghavamzadeh A, Alimoghaddam K, Ghaffari S, Rostami S, Jahani M, Iravani M, Hosseini R, Khodabandeh A, Mousavi S, Eini E. 6017 POSTER First line treatment of acute promyelocytic leukemia with arsenic trioxide without ATRA and chemotherapy. EJC Suppl 2007. [DOI: 10.1016/s1359-6349(07)71308-3] [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: 12/01/2022] Open
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Ghavamzadeh A, Alimoghaddam K, Ghaffari S, Rostami S, Jahani M, Khodabandeh A, Mossavi S, Iravani M, Eini E, Moghadam Z, Afshar F. First-line treatment of acute promyelocytic leukemia with arsenic trioxide without ATRA and chemotherapy. J Clin Oncol 2007. [DOI: 10.1200/jco.2007.25.18_suppl.7073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
7073 Background: Standard treatment of APL is ATRA plus chemotherapy but Arsenic Trioxide (ATO) is most potent single agent against APL cells. Role of ATO in first line therapy of APL needs to clarify. Methods: Between may 2000 and September 2006,we treated 141 new cases of APL(Median age 28±12.8 y/o min=11,max=71) by 2 hours iv infusion of 0.15mg/kg ATO until complete remission. Trial approved by IRB and consent form obtained. Diagnosis was by clinical and morphologic characteristics and confirmed by cytogenetic and RT-PCR for detection of t(15,17) and presence of PML-RARa. After complete remission patients received consolidation by 28 days infusion of ATO for one or four courses.(one consolidation one month after CR and for some patients second, third and forth consolidations one month after first one and two another , one year and two year after CR) Results: : complete remission observed in 121 cases(85.8%) and early mortality rate was14.9%(most common cause of early mortality was APL syndrome,61.9%).Median follow up was 28 months. For patients who achieve to complete remission,one, two and three year disease free survival were 95.6%± 2%, 76.9±4% and 57± 6%,respectively. Many relapsed patients salvaged again with ATO alone so, two and three years overall survival for this cohort was 95.6%±2% and 83.7%±4%. Increasing number of consolidation from one to four couldn’t increase DFS or OS in one and two years after CR. Conclusions: ATO is effective in treatment of new cases of APL. Introduction of ATO in first line treatment of APL(with or without ATRA plus chemotherapy) needs a multi center randomized clinical trial. No significant financial relationships to disclose.
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Affiliation(s)
- A. Ghavamzadeh
- Hematology, Oncology and BMT Research Center, Tehran, Islamic Republic of Iran
| | - K. Alimoghaddam
- Hematology, Oncology and BMT Research Center, Tehran, Islamic Republic of Iran
| | - S. Ghaffari
- Hematology, Oncology and BMT Research Center, Tehran, Islamic Republic of Iran
| | - S. Rostami
- Hematology, Oncology and BMT Research Center, Tehran, Islamic Republic of Iran
| | - M. Jahani
- Hematology, Oncology and BMT Research Center, Tehran, Islamic Republic of Iran
| | - A. Khodabandeh
- Hematology, Oncology and BMT Research Center, Tehran, Islamic Republic of Iran
| | - S. Mossavi
- Hematology, Oncology and BMT Research Center, Tehran, Islamic Republic of Iran
| | - M. Iravani
- Hematology, Oncology and BMT Research Center, Tehran, Islamic Republic of Iran
| | - E. Eini
- Hematology, Oncology and BMT Research Center, Tehran, Islamic Republic of Iran
| | - Z. Moghadam
- Hematology, Oncology and BMT Research Center, Tehran, Islamic Republic of Iran
| | - F. Afshar
- Hematology, Oncology and BMT Research Center, Tehran, Islamic Republic of Iran
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Gavamzadeh A, Ali Mogaddam K, Nedaeifard L, Jahani M, Mousavi A, Iravani M, Bahar B, Khodabandelu. 129: 15 years hematopoietic stem cell transplantation for beta Thalassemia Major in Tehran. Biol Blood Marrow Transplant 2007. [DOI: 10.1016/j.bbmt.2006.12.133] [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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Ghavamzadeh A, Samiee S, Mahdavi N, Bakhti O, Jahani M, Alimoghaddam K, Iravani M, Bahar B, Khodabandeh A, Mousavi A. 130: The incidence of secondary malignancy after stem cell transplantation, the importance of total body irradiation. Biol Blood Marrow Transplant 2007. [DOI: 10.1016/j.bbmt.2006.12.134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Ghavamzadeh A, Alimoghaddam K, Ghaffari SH, Rostami S, Jahani M, Hosseini R, Mossavi A, Baybordi E, Khodabadeh A, Iravani M, Bahar B, Mortazavi Y, Totonchi M, Aghdami N. Treatment of acute promyelocytic leukemia with arsenic trioxide without ATRA and/or chemotherapy. Ann Oncol 2006; 17:131-4. [PMID: 16227315 DOI: 10.1093/annonc/mdj019] [Citation(s) in RCA: 146] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
INTRODUCTION Arsenic trioxide is effective and approved for treatment of relapsed or refractory acute promyelocytic leukemia (APL) cases resistant to all-trans retinoic acid (ATRA), but its effect on new cases of APL is not clear. MATERIALS AND METHODS We studied 111 patients with APL. Arsenic trioxide was infused at 0.15 mg/kg daily dose, until complete remission was achieved. Then, after 28 days of rest, arsenic trioxide was infused daily for 28 days as consolidation therapy. We studied minimal residual disease (MRD) by semi-sensitive reverse transcription polymerase chain reaction (RT-PCR) on peripheral blood samples. RESULTS Complete remission was observed in 95 patients (85.6%). With the median (range) follow-up period of 16.5 (1-57) months, 1- and 2-year disease-free survival was 88.3% and 63.7%, respectively; 24 patients relapsed, 19 of whom achieved a second complete remission, again by arsenic trioxide. Third and fourth remissions were seen in some relapsed patients, again by arsenic trioxide. For patients in complete remission, 1- and 3-year survival was 95.5% and 87.6%, respectively. MRD was positive in four (8.3%) out of 48 cases during 1 year after remission induction; three of them relapsed clinically. CONCLUSIONS Arsenic trioxide is effective as first-line treatment for APL. Results of arsenic trioxide combination therapy with chemotherapy/ATRA requires further study.
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Affiliation(s)
- A Ghavamzadeh
- Haematology, Oncology and BMT Research Centre, Tehran University of Medical Sciences, Tehran, Iran
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Mohyeddin Bonab M, Alimoghaddam K, Vatandoust S, Forouzia F, Jahani M, Ghavamzadeh A. Are HLA antigens a risk factor for acute GVHD in thalassemic patients receiving HLA-identical stem cell transplantation? Transplant Proc 2005; 36:3190-3. [PMID: 15686726 DOI: 10.1016/j.transproceed.2004.10.088] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
We retrospectively evaluated the association between risk factors and acute graft-versus-host disease (aGVHD) among 182 beta thalassemia patients who received 73 peripheral blood stem cell (PBSC) or 109 bone marrow transplants from HLA-identical siblings between 1991 and 2003. The relationship between the severity of aGVHD was examined for the following factors: HLA antigens, age, sex, ABO mismatch, sex mismatch (between recipient and donor), thalassemia class, graft source, transplant cell dose, CD3+ cell dose, conditioning regimen, GVHD prophylaxis, neutrophil engraftment duration, and blood product transfusions using univariate and multivariate analyses. Overall 61 (34%) patients developed clinical grade III or grade IV aGVHD. Univariate analysis confirmed an increased risk of severe aGVHD, which was associated with HLA-A11, HLA-A26, and PBSCT (P=.04, .03, and .03, respectively). The risk of aGVHD was reduced in the presence of HLA-A3 (P=.03). Multivariate analysis confirmed the increased risk of aGVHD associated with HLA-A11 (P=.04), HLA-A26 (P=.01), and a short-period neutrophil recovery (P=.009). In this study HLA-A11, HLA-A26, PBSCT, and a short neutrophil engraftment period were probable risk factors and HLA-A3 a probable protective factor associated with severe aGVHD. These data may provide useful guidelines to choose strategies for treatment and prevention.
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Affiliation(s)
- M Mohyeddin Bonab
- Heamatology, Oncology, and BMT Research Center, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran.
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Iravani M, Tavakoli M, Shamshiri A, Mousavi A, Bahar B, Jahani M, Ghavamzadeh A. Myeloablative conditioning with fludarabine and busulfan for allogeneic PBSCT in chronic phase CML. Biol Blood Marrow Transplant 2005. [DOI: 10.1016/j.bbmt.2004.12.064] [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: 10/25/2022]
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Ghavamzadeh A, Alimoghaddam K, Rostami S, Ghafari H, Jahani M, Hosseini R, Mosavi A, Irvani M, Bahar B, Khodabandeh A. 195 Treatment of new cases of acute promyelocytic leukaemia by arsenic trioxide. EJC Suppl 2004. [DOI: 10.1016/s1359-6349(04)80203-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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Ghavamzadeh A, Bahar B, Gholibeikian S, Safavifar F, Iravani M, Jahani M. AML transplantation: autologous vs allogeneic. Biol Blood Marrow Transplant 2004. [DOI: 10.1016/j.bbmt.2003.12.018] [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: 10/26/2022]
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Ghavamzadeh A, Iravani M, Evazi M, Shamshiri A, Mousavi A, Bahar B, Gholibeikian S, Chardoli B, Jahani M. Fludarabin and busulfan as a conditioning regimen for allogeneic peripheral blood stem cells transplantation in leukemic patients. Biol Blood Marrow Transplant 2004. [DOI: 10.1016/j.bbmt.2003.12.157] [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: 10/26/2022]
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Ghavamzadeh A, Larijani B, Jahani M, Khoshniat M, Bahar B, Tabatabaei O. Thyroid, parathyroid, gonadal, and pancreatic β-cell function after bone marrow transplantation with chemotherapy-only conditioning. Transplant Proc 2003; 35:3101-4. [PMID: 14697989 DOI: 10.1016/j.transproceed.2003.10.030] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
INTRODUCTION Radiation and cytotoxic chemotherapy can provoke short- and long-term endocrine dysfunction. We studied the prevalence of thyroid, parathyroid, gonadal, and pancreatic beta-cell function in patients undergoing bone marrow transplantation (BMT). MATERIALS AND METHOD Forty-six patients (12 women, 34 men), aged 1.5 to 49 years (mean, 15.1 years), were evaluated for thyroid, parathyroid, gonadal, and pancreatic beta-cell function before and 3, 6, and 12 months after BMT with a little busulfan-cyclophosphamide conditioning regimen. RESULTS Thyroid and parathyroid function was unaltered by BMT. Leydig cell function was normal in 11 adult men (G5P5) before and at 3, 6, and 12 months after BMT, but injury to the germinal epithelium (oligo- or azoospermia) was seen before and 12 months after BMT. There was no relationship between serum FSH and germinal epithelial injury. Maturation was normal in six boys (G2P2 or G3P3 at BMT) 12 months post-BMT. Primary hypogonadism was seen in four adult women (B5P5) after BMT. One 14-year-old girl continued to have regular menstrual periods during the 24 months after BMT. Another girl (P1B1 pre-BMT) developed ovarian failure 12 months post-BMT. Pancreatic beta-cell function was normal pre- and post-BMT in 12 thalassemic patients with serum ferritin > 1000 ng/mL. CONCLUSION BMT with chemotherapy-only conditioning seems primarily to affect gonadal function, without having any significant effect on thyroid, parathyroid, or pancreatic beta-cell function.
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Affiliation(s)
- A Ghavamzadeh
- Haematology, Oncology and BMT Research Centre, Tehran University of Medical Sciences, Fifth Floor, Doctor Shariati Hospital, North Kargar Avenue, Tehran 14114, Iran.
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Abstract
Esophageal cancer is among the 10 most frequent cancers in the world. Iran is one of the known areas with a high incidence of esophageal cancer. Most of the patients in Iran have been reported from the north and northeast regions of the country. In one survey by the Iran Cancer Institute, 9% of all cancers and 27% of gastrointestinal cancers were esophageal carcinoma. The male to female ratio was 1.7/1. The distal portion of the esophagus is involved more often than other parts. Consumption of wheat flour, exposure to residues from opium pipes, drinking hot tea, and chewing nass (a mixture of tobacco, lime, ash, and other ingredients) are the suspect etiologic agents for esophageal cancer in Iran. Dysphagia, weight loss, anorexia, abdominal pain, and odynophagia are the common symptoms and signs of Iranian patients with esophageal cancer. For clinical staging, chest computed tomographic scanning is performed. Adenocarcinoma of the esophagus is not as common in Iran as in western countries. Public education, nutritional support, and eradication of opium addiction may decrease the morbidity and mortality that result from esophageal cancer. Surgery has traditionally been the mainstay of esophageal cancer treatment in Iran. Radiotherapy is mainly used postoperatively. The usual combination chemotherapy regimen is cisplatin plus flurouracil (5-Fu). Semin Oncol 28:153-157.
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Affiliation(s)
- A Ghavamzadeh
- Department of Oncology, Hematology and Bone Marrow Transplant, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran
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Ghavamzadeh A, Alimoghadam K, Nasseri P, Jahani M, Khodabandeh A, Ghahremani G. Correction of bone marrow failure in dyskeratosis congenita by bone marrow transplantation. Bone Marrow Transplant 1999; 23:299-301. [PMID: 10084264 DOI: 10.1038/sj.bmt.1701567] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Dyskeratosis congenita is recognized by its dermal lesions and constitutional aplastic anemia in some cases. We report successful allogeneic bone marrow transplantation in two siblings with this disease from their sister, and their long term follow-up. We used reduced doses of cyclophosphamide and busulfan for conditioning instead of total body irradiation. Also, we report late adverse effects of transplantation which are not distinguishable from the natural course of disease.
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Affiliation(s)
- A Ghavamzadeh
- Department of Oncology, Shariati Hospital, Tehran University of Medical Science, Iran
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Ghavamzadeh A, Nasseri P, Eshraghian MR, Jahani M, Baybordi I, Nateghi J, Khodabandeh A, Sadjadi AR, Mohyeddin M, Khademi Y. Prognostic factors in bone marrow transplantation for beta thalassemia major: experiences from Iran. Bone Marrow Transplant 1998; 22:1167-9. [PMID: 9894719 DOI: 10.1038/sj.bmt.1701509] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
This study concerns the effects of several pre-transplant features on outcome for patients with beta thalassemia major who underwent bone marrow transplantation (BMT). Seventy patients with beta thalassemia major underwent bone marrow transplantation during the period 1991-1997 in Shariati Hospital in Tehran, Iran. The survival and rejection curves levelled off at 8 and 18 months after transplantation at 82.6% and 11.4%, respectively. Pre-transplant clinical features (age, serum ferritin, portal fibrosis, hepatomegaly and quality of chelation therapy) were examined for their effects on survival and recurrence of thalassemia in this group of patients who were less than 16 years old. Increasing age, presence of portal fibrosis and increasing serum ferritin were significantly associated with reduced probability of survival (P = 0.0047, P = 0.016 and P = 0.024, respectively). Hepatomegaly and inadequate pre-transplant chelation therapy which were documented as poor prognostic factors in previous studies, were not evaluable in this study. We also showed the benefits of transplanting more than 5.5 x 10(8)/kg cells in this group of patients with no increase in complications.
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Affiliation(s)
- A Ghavamzadeh
- Department of Hematology, Oncology and BMT, Shariati Hospital, Tehran University of Medical Sciences, Iran
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Ghavamzadeh A, Jahani M, Baybordi E. Bone marrow transplantation in Iran. Bone Marrow Transplant 1994; 13:743-4. [PMID: 7920308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Seventy-three BMT procedures (42 allogeneic-BMT, 30 autologous-BMT, 1 syngeneic transplant) were undertaken at the Shariati Hospital in Tehran between March 1991 and November 1993. Allogeneic-BMT was performed for thalassaemia major (n = 23), AML in complete remission (n = 3), severe aplastic anaemia (n = 7), CML (n = 7), dyskeratosis congenita (n = 2) and Fanconi anaemia (n = 1). Conditioning regimens comprised busulphan (BU) plus cyclophosphamide (CY) or CY only. Thirty-two (78%) of the 43 patients remain alive 1-34 months after BMT. Twelve patients died: the causes of death were haemorrhagic cystitis (n = 1), CMV pneumonitis (n = 1), GVHD (n = 3), infection (n = 3), rejection (n = 1), VOD (n = 2) and hepatitis (n = 1). Autologous-BMT was performed for patients with AML in CR (n = 16), ALL in CR (n = 9), lymphoma in relapse (n = 3), Ewing sarcoma (n = 1) and multiple myeloma (n = 1). The median age was 18 years. Conditioning regimens were Ara C plus CY, etoposide plus CY and high-dose melphalan. Sixteen (54%) of the 30 patients survive, 14 in continuous complete remission. The causes of death were relapse (AML (n = 7), ALL (n = 4), lymphoma (n = 1)), VOD (n = 1) and infection (n = 1).
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Affiliation(s)
- A Ghavamzadeh
- Dr Shariati Hospital, University of Medical Science, Tehran, Iran
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Gracy RW, Chapman ML, Cini JK, Jahani M, Tollefsbol TO, Yüksel KU. Molecular basis of the accumulation of abnormal proteins in progeria and aging fibroblasts. Basic Life Sci 1985; 35:427-42. [PMID: 4062822 DOI: 10.1007/978-1-4899-2218-2_27] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Park YB, Jahani M, Lacko AG. Isolation of high-density lipoproteins by immunoaffinity column chromatography from hog plasma. Comp Biochem Physiol B 1985; 82:529-33. [PMID: 4085214 DOI: 10.1016/0305-0491(85)90018-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
High density lipoprotein (HDL) was isolated from hog plasma by a simple immunoaffinity column chromatography procedure using immobilized anti-apolipoprotein AI. The composition of HDL isolated by immunoaffinity chromatography was nearly identical to that of a control sample that was isolated by an alternate method utilizing ultracentrifugation and gel chromatography. The HDL isolated by immunoaffinity chromatography had a larger number of polypeptide components that the control as indicated by acrylamide gel electrophoresis in the presence of urea. When the HDL isolated by immunoaffinity chromatography was applied to a heparin-agarose column the amount of protein retained was approximately twice that of the control. These findings indicate that the ultracentrifugation procedure probably induced the loss of apolipoprotein E containing components from the HDL complex.
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Chong KS, Jahani M, Hara S, Lacko AG. Characterization of lecithin-cholesterol acyltransferase from human plasma. 3. Chemical properties of the enzyme. Can J Biochem Cell Biol 1983; 61:875-81. [PMID: 6627099 DOI: 10.1139/o83-112] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The polypeptide molecular weight of lecithin-cholesterol acyltransferase (LCAT) (45000) was obtained by deducting the weight of carbohydrate moiety (25%, w/w) from the total molecular weight of 60000. LCAT was found to have a relatively high content of glutamic acid, aspartic acid, glycine, and leucine residues and four half-cystines. The carbohydrate content was found to be about 25% (w/w): hexoses, 13%; hexosamines, 6.2%; and sialic acid, 5.4%. The total number of 408 amino acid residues per mole and the mean residue weight of 110.3 were found. From fluorescence spectroscopy analysis, 6-7 mol of tryptophan were found per mole of LCAT in 10 mM phosphate (pH 7.4). However, when LCAT was digested by the mixture of chymotrypsin and pronase the tryptophan residues increased to 10-11 mol/mol of LCAT, which agrees well with data obtained previously by ultraviolet absorption spectroscopy. A partial specific volume of 0.707 mL/g was determined by compositional analysis. Human LCAT was found to have a relatively high extinction coefficient (E1%1cm) of 21 at 280 nm and neutral pH. Two residues of cysteine per mole of LCAT were estimated both in the presence or absence of sodium dodecyl sulfate by titration with 5,5'-dithiobis-2-nitrobenzoic acid. The enzyme showed a lower tendency to staining with Coomassie blue R-250 than bovine serum albumin. The enzyme was rapidly inactivated by diisopropyl fluorophosphate (DFP), regardless of whether the free sulfhydryl were blocked or not. The enzyme was also irreversibly inhibited by cysteine above concentrations of 1 mM.(ABSTRACT TRUNCATED AT 250 WORDS)
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Jahani M, Lacko AG. Study of the lecithin: cholesterol acyltransferase reaction with liposome and high density lipoprotein substrates. Biochim Biophys Acta 1982; 713:504-11. [PMID: 6817810 DOI: 10.1016/0005-2760(82)90310-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The activity of highly purified preparations of human plasma lecithin: cholesterol acyltransferase were stabilized by precipitating the enzyme with ammonium sulfate and using the dilutions of the particulate lecithin: cholesterol acyltransferase suspension for enzyme assays. Ammonium sulfate concentrations in the assay mix up to 0.1 M had no significant effect on lecithin: cholesterol acyltransferase activity. The basic enzymatic properties of lecithin: cholesterol acyltransferase were investigated using liposomes and high density lipoprotein (HDL) substrates. pH optima for both substrates was approximately 8.0. The temperature dependence of lecithin: cholesterol acyltransferase activity resulted in non-linear Arrhenius plots with both substrates. The activity vs. temperature (degrees C) curves showed slight inflections at 30 degrees C, which may have been due to the relatively rapid inactivation of the enzyme above this temperature. HDL3 was found to be a better substrate than HDL or HDL2. HDL3 was also considerably better than egg phosphatidylcholine/cholesterol liposomes as an lecithin: cholesterol acyltransferase substrate. Addition of HDL2 to a reaction mix of enzyme and HDL3 indicated that HDL2 acts as an inhibitor of cholesterol esterification in this system.
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Oray B, Jahani M, Gracy RW. High-sensitivity peptide mapping of triosephosphate isomerase: a comparison of high-performance liquid chromatography with two-dimensional thin-layer methods. Anal Biochem 1982; 125:131-8. [PMID: 7149248 DOI: 10.1016/0003-2697(82)90393-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Jahani M, Lacko AG. A study of the interaction of lecithin: cholesterol acyltransferase with subfractions of high density lipoproteins. J Lipid Res 1981; 22:1102-10. [PMID: 7299290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
High density lipoproteins (HDL) were isolated by a chromatographic procedure and subsequently fractionated on a DEAE cellulose (DE-52) column. Four fractions were separated and analyzed for lipid and protein composition and molecular weight. During ion exchange chromatography, one of the four fractions consistently coincided with lecithin:cholesterol acyltransferase (LCAT) activity. When the HDL fractions were incubated with highly purified LCAT preparations, the LCAT activity showed a dependence on unesterified cholesterol concentrations. The HDL subfraction eluting at the highest ionic strength was found to be the best substrate for LCAT. This subfraction exhibited apoprotein and lipid composition similar to HDL3 and contained 31% of the total apoprotein D present in all the subfractions. A positive correlation was found between LCAT activity and the cholesteryl ester/unesterified cholesterol ratio, and a negative correlation was found between LCAT substrate potential and apparent molecular weight of the HDL subfractions when these subfractions were incubated with LCAT. No correlation was apparent between LCAT activity, and the phospholipid/unesterified cholesterol ratio or with the apoA-I/apoA-II ratio.U
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Jahani M, Lacko AG. A study of the interaction of lecithin: cholesterol acyltransferase with subfractions of high density lipoproteins. J Lipid Res 1981. [DOI: 10.1016/s0022-2275(20)40668-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Abstract
High density lipoproteins (HDL) were isolated by a procedure employing polyanion precipitation and column chromatography. The product polyanion precipitation and column chromatography. The product was free of low denisty lipoproteins (LDL) but serum albumin (HSA) was still present. The remaining HSA was removed by an immunoadsorbent column. The HDL isolated by our method was compared to another HDL preparation isolated from the same plasma sample by the combination of ultracentrifugation and gel chromatgraphy. It was found to have approximately the same lipid and protein composition as the HDL isolated by conventional techniques. Minor differences included a higher phospholipid and apoprotein E content and lower triglyceride and ApoC II content of the HDL isolated by column chromatography. The method described here is considerably less tedious than earlier techniques, can be scaled up without substantial increase in labor and results in an approximately 30% higher yield than the method described by Rudel et al.
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