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Alnagar AA, Mahmoud AA, El Gammal MM, Hamdy N, Samra MA. Outcome of Core Binding Factor Acute Myeloid Leukemia by Receptor Tyrosine Kinase Mutation. Clin Lymphoma Myeloma Leuk 2020; 20:459-467. [PMID: 32229198 DOI: 10.1016/j.clml.2020.02.002] [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] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Revised: 02/01/2020] [Accepted: 02/04/2020] [Indexed: 01/20/2023]
Abstract
BACKGROUND Core binding factor acute myeloid leukemia (CBF-AML) encodes 2 recurrent cytogenetic abnormalities, t(8;21) and inv(16), which carries an overall good prognosis. However, some patients will develop a relapse. We sought define the unfavorable group of CBF-AML by analysis of (c-KIT and FLT3-ITD) and to correlate them with treatment outcome. PATIENTS AND METHODS We performed a prospective study of 70 patients with CBF-AML diagnosed and managed at the medical oncology department of the (National Cancer Institute), Cairo University, with analysis of c-KIT and FLT3 mutations. All patients had received "3 + 7" induction, followed by 3 to 4 courses of high-dose cytarabine consolidation. The institutional review board approved the present study. RESULTS The median patient age was 31 years (range, 18-60 years), with a male/female ratio of 4:3. Of the 70 patients, 42 (60%) had t(8;21) and 28 had inv(16) (40%). c-KIT mutations (exons 8 and 17) were detected in 10 of 52 tested patients, and FLT3-ITD was detected in 3 of 70 patients. Patients with inv(16) experienced more lymphadenopathy and splenomegaly, had a higher median initial leukocyte count. Hepatitis C antibody positivity (8 of 42) was exclusively present in patients with t(8;21). The median overall survival (OS) was 19.5 months, and the median disease-free survival (DFS) was not reached. Patients with inv(16) had near-significant (P = .07) better DFS than patients with t(8;21). c-KIT mutations had no significant effect on OS or DFS. However, reverse tyrosine kinase mutations had a negative effect on DFS but not OS (P = .04). CONCLUSION CBF-AML with reverse tyrosine kinase mutation conveys a worse prognosis. Hepatitis C virus antibody positivity might be associated with t(8;21) AML and inv(16) with more extramedullary disease.
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Affiliation(s)
- Ahmed A Alnagar
- Department of Medical Oncology, Faculty of Medicine, Zagazig University, Zagazig, Egypt.
| | - Asmaa A Mahmoud
- Department of Medical Oncology, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Mosaad M El Gammal
- Department of Medical Oncology, National Cancer Institute, Cairo University, Cairo, Egypt
| | - Naera Hamdy
- Department of Clinical Pathology, National Cancer Institute, Cairo University, Cairo, Egypt
| | - Mohamed A Samra
- Department of Medical Oncology, National Cancer Institute, Cairo University, Cairo, Egypt
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2
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Hafez H, Abdalla A, Hammad M, Hamdy N, Elsharkawy N, Khaled M, Elhaddad A. Impact of donor lymphocyte infusion in relapsing myeloid neoplasms post allogeneic hematopoietic stem cell transplantation. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz251.023] [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: 11/13/2022] Open
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3
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Ali R, Hammad A, El-Nahrery E, Hamdy N, Elhawary AK, Eid R. Serum RANKL, osteoprotegerin (OPG) and RANKL/OPG ratio in children with systemic lupus erythematosus. Lupus 2019; 28:1233-1242. [DOI: 10.1177/0961203319867129] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Background Systemic lupus erythematosus (SLE) patients have lower bone mineral density (BMD) compared with healthy individuals because of general, genetic, disease and medication-related factors. The disturbance of the receptor activator of nuclear factor-κB ligand (RANKL)/osteoprotegerin (OPG) ratio has been reported to be associated with low BMD in many disorders in adults and children alike. Objectives The objectives of this study were (i) to assess serum OPG, RANKL and RANKL/OPG ratio levels in SLE children and controls, (ii) to determine whether the cumulative glucocorticoid (CGCS) dose had any effect on the concentration of serum RANKL, OPG and RANKL/OPG ratio, and (iii) to determine the relation of these parameters to BMD. Methods We evaluated 50 SLE children and 50 age- and sex-matched healthy controls. RANKL and OPG were assessed in serum and compared between patients and controls. For SLE patients, a univariate followed by multivariable analysis were carried out to detect the possible predictors of the changes in RANKL, OPG and RANKL/OPG ratio levels. Lumbar BMD for all patients was assessed by dual-energy X-ray absorptiometry (DXA) scan and then correlated to different probable correlated factors. Results RANKL, OPG and RANKL/OPG ratio were significantly higher in SLE patients ( p ≤ 0.001). Univariate analysis showed significant correlations of RANKL with CGCS ( p ≤ 0.001) and with DXA scan z-score ( p = 0.007): OPG was significantly correlated to Systemic Lupus Erythematosus Disease Activity Index (SLEDAI) score ( p = 0.001) and anti-double-stranded DNA ( p = 0.001), whereas RANKL/OPG was significantly correlated to duration of illness and DXA z-score ( p = 0.002). The multivariable analysis showed that DXA z-score was an independent predictor of RANKL and RANKL/OPG ratio ( p = 0.019 and 0.008, respectively), whereas SLEDAI score was an independent predictor of OPG levels. BMD was negatively correlated to disease duration ( p = 0.008) and CGCS dose ( p = 0.015), but no significant correlation has been found between BMD and cumulative SLEDAI score ( p = 0.29). Conclusions Serum RANKL/OPG ratio is elevated in Egyptian children with SLE and is considered a risk factor for reduced bone mass in these children. Other risk factors for low BMD include high CGCS dose and disease duration, supporting that osteoporosis in SLE is multifactorial.
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Affiliation(s)
- R Ali
- Clinical Laboratory Sciences Department, Faculty of Applied Medical Sciences, Taibah University, AL-Madinah Al-Mounawara, Saudi Arabia
- Genetics Unit, Mansoura University Children's Hospital, Faculty of Medicine, Mansoura University, Mansoura, Dakahlia, Egypt
| | - A Hammad
- Pediatric Nephrology Unit, Mansoura University Children's Hospital, Faculty of Medicine, Mansoura University, Mansoura, Dakahlia, Egypt
| | - E El-Nahrery
- Biochemistry, Chemistry Department, Faculty of Science, Suez University, Suez, Egypt
| | - N Hamdy
- Pediatric Nephrology Unit, Mansoura University Children's Hospital, Faculty of Medicine, Mansoura University, Mansoura, Dakahlia, Egypt
| | - A K Elhawary
- Pediatric Endocrinology Unit, Mansoura University Children's Hospital, Faculty of Medicine, Mansoura University, Mansoura, Dakahlia, Egypt
| | - R Eid
- Pediatric Nephrology Unit, Mansoura University Children's Hospital, Faculty of Medicine, Mansoura University, Mansoura, Dakahlia, Egypt
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Boyce AM, Turner A, Watts L, Forestier-Zhang L, Underhill A, Pinedo-Villanueva R, Monsell F, Tessaris D, Burren C, Masi L, Hamdy N, Brandi ML, Chapurlat R, Collins MT, Javaid MK. Improving patient outcomes in fibrous dysplasia/McCune-Albright syndrome: an international multidisciplinary workshop to inform an international partnership. Arch Osteoporos 2017; 12:21. [PMID: 28243882 PMCID: PMC5653227 DOI: 10.1007/s11657-016-0271-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [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] [Received: 03/22/2016] [Accepted: 03/31/2016] [Indexed: 02/03/2023]
Abstract
UNLABELLED To develop consensus on improving the management of patients, we convened an international workshop involving patients, clinicians, and researchers. Key findings included the diagnostic delay and variability in subsequent management with agreement to develop an international natural history study. We now invite other stakeholders to join the partnership. PURPOSE The aim of this study was develop a consensus on how to improve the management of patients with fibrous dysplasia and prioritize areas for research METHODS: An international workshop was held over 3 days involving patients, clinicians, and researchers. Each day had a combination of formal presentations and facilitated discussions that focused on clinical pathways and research. RESULTS The patient workshop day highlighted the variability of patients' experience in getting a diagnosis, the knowledge of general clinical staff, and understanding long-term outcomes. The research workshop prioritized collaborations that improved understanding of the contemporary natural history of fibrous dysplasia/McCune-Albright syndrome (FD/MAS). The clinical workshop outlined the key issues around diagnostics, assessment of severity, treatment and monitoring of patients. CONCLUSIONS In spite of advances in understanding the genetic and molecular underpinnings of fibrous dysplasia/McCune-Albright syndrome, clinical management remains a challenge. From the workshop, a consensus was reached to create an international, multi-stakeholder partnership to advance research and clinical care in FD/MAS. We invite other stakeholders to join the partnership.
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Affiliation(s)
- A. M. Boyce
- Skeletal Clinical Studies Unit, Craniofacial and Skeletal Diseases Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA,Bone Health Program, Division of Orthopedics and Sports Medicine, Children’s National Medical Center, Washington, DC, USA,Division of Endocrinology and Diabetes, Children’s National Medical Center, Washington, DC, USA
| | - A. Turner
- NIHR Musculoskeletal Biomedical Research Unit, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Nuffield Orthopaedic Centre, Windmill Road, Oxford OX3 7LD, UK
| | - L. Watts
- NIHR Musculoskeletal Biomedical Research Unit, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Nuffield Orthopaedic Centre, Windmill Road, Oxford OX3 7LD, UK
| | - L. Forestier-Zhang
- NIHR Musculoskeletal Biomedical Research Unit, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Nuffield Orthopaedic Centre, Windmill Road, Oxford OX3 7LD, UK
| | - A. Underhill
- Chandlers Ford, Eastleigh, Hampshire SO53 1TQ, UK
| | - R. Pinedo-Villanueva
- NIHR Musculoskeletal Biomedical Research Unit, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Nuffield Orthopaedic Centre, Windmill Road, Oxford OX3 7LD, UK
| | - F. Monsell
- Bristol Royal Hospital for Children, Paul O’Gorman Building, Upper Maudlin Street, Bristol BS2 8BJ, UK
| | - D. Tessaris
- Department of Pediatric Endocrinology and Diabetology, Regina Margherita Children Hospital, University of Turin, Piazza Polonia 94, 10126 Turin, Italy
| | - C. Burren
- Bristol Royal Hospital for Children, Paul O’Gorman Building, Upper Maudlin Street, Bristol BS2 8BJ, UK
| | - L. Masi
- Department of Internal Medicine, University of Florence, Florence, Viale Pieraccini 6, 50134 Florence, Italy
| | - N. Hamdy
- Department of Endocrinology and Metabolic Diseases, Leiden University Medical Centre, Leiden 2333 ZA, The Netherlands
| | - M. L. Brandi
- Department of Internal Medicine, University of Florence, Florence, Viale Pieraccini 6, 50134 Florence, Italy
| | - R. Chapurlat
- NSERM UMR 1033, Department of Rheumatology, Université de Lyon, Hospices Civils de Lyon, Lyon, France
| | - M. T. Collins
- Skeletal Clinical Studies Unit, Craniofacial and Skeletal Diseases Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA
| | - Muhammad Kassim Javaid
- NIHR Musculoskeletal Biomedical Research Unit, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Nuffield Orthopaedic Centre, Windmill Road, Oxford OX3 7LD, UK
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El Ella DAA, Saleh KA, Hassan M, Hamdy N, El-Araby ME, Abouzid KAM. Synthesis and anti-proliferative activity of substituted-anilinoquinazolines and its relation to EGFR inhibition. ACTA ACUST UNITED AC 2012; 62:360-6. [PMID: 22723174 DOI: 10.1055/s-0032-1312601] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
4-Anilinoquinazoline is a privileged scaffold in developing small molecule inhibitors of tyrosine kinases (TK) especially epidermal growth factor receptor (EGFR). 2 series belonging to 3'-substituted-4-anilinoquinazoline scaffold were synthesized and screened in vitro on isolated and a breast cancer cell line. The research aims at exploring the activity of compounds having diverse substituents at 3' position of the aniline moiety. Generally, the meta-substituted-anilinoquinazolines exhibited significant inhibitory activity against isolated enzyme as well as MCF-7 cancer cell line. For instance, compound 10b inhibited >99% of EGFR activities at 10 µM concentration. 6 of the tested compounds exhibited range of anti-proliferative activity below 10 µM potency. In particular, compounds 6e and 10b displayed the highest activity among the tested compounds with IC50 values equal to 8.6 and 4.84 µM, respectively. Structure-based tools were utilized to rationalize EGFR-TK binding of compound 10b since it is the most active compound in the enzyme inhibition test.
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Affiliation(s)
- D A A El Ella
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Ain Shams University, Cairo, Egypt
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Wortel R, Hamdy N, van Wijk J, Lock M. UP-03.069 Urological Management of Cystine Nephrolithiasis; 20 Years of Experience in Four Different Centres. Urology 2011. [DOI: 10.1016/j.urology.2011.07.1159] [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: 11/26/2022]
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Mohammad RM, Limvarapuss C, Wall NR, Hamdy N, Beck FW, Pettit GR, Al-Katib A. A new tubulin polymerization inhibitor, auristatin PE, induces tumor regression in a human Waldenstrom's macroglobulinemia xenograft model. Int J Oncol 1999; 15:367-72. [PMID: 10402249 DOI: 10.3892/ijo.15.2.367] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Waldenstrom's macroglobulinemia (WM) is an uncommon lymphoproliferative disease which remains incurable with current treatment protocols. We have previously established a permanent WM cell line, WSU-WM, which grows as a xenograft in severe combined immune deficient (SCID) mice. In this study, we investigated the anti-tumor effects of auristatin PE (a structural modification of the marine, shell-less mollusk peptide constituent dolastatin 10). WSU-WM cells were cultured in RPMI-1640 at a concentration of 2x10(5) cells/ml using 24-well plates. Auristatin PE or dolastatin 10 were added to triplicate wells and cell count and viability were assessed after 24, 48 and 72 h. Results showed that both agents were active against WSU-WM, and were able to induce complete growth inhibition at 100 pg/ml. The efficacy of these agents in vivo was evaluated using the WSU-WM SCID mouse xenograft model. Auristatin PE and dolastatin 10 were given i.v. via tail vein at 2.0 mg/kg and 0.2 mg/kg, respectively. The agents were given every second day for three injections which represent the maximum tolerated doses. Tumor growth inhibition (T/C), tumor growth delay (T-C), and log10 kill for auristatin PE and dolastatin 10 were 0%, 18 days, 2.83 and 67%, 2 days, 0.06, respectively. Based on these animal results, dolastatin 10 was inactive while auristatin PE was highly active. We therefore focused further investigation on auristatin PE to understand some of its mechanisms of action. Using two flow cytometry assays, propidium iodide for cell cycle analysis and 7-amino actinomycin D (7AAD) to detect apoptosis, we were able to demonstrate that auristatin PE at 10 pg/ml after 24 h arrested 50% of WSU-MW cells in G2M. Concomitantly, 31% of auristatin PE-treated cells entered apoptosis. By 72 h, greater than 75% of the cells became apoptotic. The activity of auristatin PE should be evaluated in other tumor types and in clinical trials.
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Affiliation(s)
- R M Mohammad
- Division of Hematology and Oncology, Wayne State University School of Medicine, Detroit, MI 48201, USA
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Mohammad RM, Limvarapuss C, Hamdy N, Dutcher BS, Beck FW, Wall NR, Al-Katib AM. Treatment of a de novo fludarabine resistant-CLL xenograft model with bryostatin 1 followed by fludarabine. Int J Oncol 1999; 14:945-50. [PMID: 10200346 DOI: 10.3892/ijo.14.5.945] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
WSU-CLL is a de novo fludarabine resistant cell line established from a patient with advanced chronic lymphocytic leukemia (CLL) refractory to chemotherapy including fludarabine (Flud). Our previous studies indicate that bryostatin 1 (Bryo 1) induces differentiation of WSU-CLL and increases the ratio of dCK/5'-NT activity and Bax/Bcl-2. This study tests the hypothesis that Bryo 1-differentiated cells are more susceptible to Flud than the parent WSU-CLL cells. Flud, given sequentially after Bryo 1, in vitro and in vivo animal studies resulted in significantly higher rates of growth inhibition and improved animal survival. Flud at 100 to 600 nM exhibited a dose-dependent growth inhibitory effect on the WSU-CLL cell line. The sequential exposure to Bryo 1 (10 nM for 72 h) followed by Flud (100 nM) resulted in significantly higher rates of growth inhibition than either the reverse addition of these two agents or each agent alone, but was not significantly different than the concurrent addition of Bryo 1 + Flud. Using 7-amino-actinomycin D staining and flow cytometry, apoptosis was seen in 40.8% of cells treated with Bryo 1 (10 nM, 72 h) followed by Flud, compared with Flud (100 nM, 72 h) followed by Bryo 1 (18.1%). To demonstrate that Bryo 1 enhancement of Flud efficacy was not restricted to in vitro culture, we used the WSU-CLL xenograft model in mice with severe combined immune deficiency (SCID). Bryo 1 + Flud at the maximum tolerated doses (75 microg/kg i.p. and 200 mg/kg i.v., respectively) were administered to mice in different combinations. The survival in days, the tumor growth inhibition ratio (T/C), the tumor growth delay (T-C) in days, log10 kill, as well as mean tumor weight (mtw) of mice treated with Bryo 1 followed by Flud, were significantly better than control and other groups. T/C%, T-C, log10 kill and mtw were as follows: Bryo 1 (36.8%, 10 days, 0.8, 375 mg); Flud (100%, 0. 0 day, 0.0, 1130 mg); Bryo 1 + Flud (14.3%, 12 days, 0.95, 288 mg); Bryo 1 followed by Flud (4.6%, 17 days, 1.35, 35 mg); Flud followed by Bryo (40.3%, 10 days, 0.80, 175 mg). We conclude that: i) Bryo 1 sensitizes WSU-CLL cells to Flud and enhances apoptosis; ii) the sequential treatment with Bryo 1 followed by Flud resulted in higher anti-tumor activity compared with either agent alone, in combination, or the reverse addition of these agents and iii) these results are comparable to those of Bryo 1 followed by 2-CdA suggesting common pathway(s) of interaction between Bryo 1 and purine analogues.
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Affiliation(s)
- R M Mohammad
- Division of Hematology and Oncology, Wayne State University School of Medicine, Lande Medical Research Building, Room 317, Detroit, MI 48201, USA
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Mohammad RM, Beck FW, Katato K, Hamdy N, Wall N, Al-Katib A. Potentiation of 2-chlorodeoxyadenosine activity by bryostatin 1 in the resistant chronic lymphocytic leukemia cell line (WSU-CLL): association with increased ratios of dCK/5'-NT and Bax/Bcl-2. Biol Chem 1998; 379:1253-61. [PMID: 9820586 DOI: 10.1515/bchm.1998.379.10.1253] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The activities of 2-chlorodeoxyadenosine (2-CdA) metabolizing enzymes, deoxycytidine kinase (dCK) and cytosolic 5'-nucleotidase (5'-NT) were measured in control and bryostatin 1 treated CLL cells using an EBV-negative WSU-CLL cell line. This cell line was established from a patient with CLL resistant to fludarabine. The results revealed a significant increase in dCK activity in bryostatin 1 treated cells at 48 and 72 h compared with the control. 5'-NT activity decreased significantly at 48 h. The ratio of dCK to 5'-NT activity was significantly increased in bryostatin 1 treated WSU-CLL cells after 48 h. WSU-CLL cells treated with bryostatin 1 exhibited an increase in the percentage of apoptotic and dead cells from control levels of 16% to 40%. This percentage was further increased to 67% following the addition of 11.2 microM 2-CdA to WSU-CLL cells pretreated with bryostatin 1. Results from Western blot analysis indicate that WSU-CLL cells express high levels of Bcl-2, Bcl-xL and c-myc, and a low level of Bax. p53 in untreated WSU-CLL cells is undetectable. WSU-CLL cells treated with bryostatin 1 showed a significant increase in the ratio of Bax to Bcl-2. To demonstrate that the bryostatin 1 mediated enhancement of 2-CdA efficacy was not restricted to in vitro cell culture, we have studied the tumor growth delay of WSU-CLL xenografts treated with placebo, bryostatin 1, 2-CdA, and bryostatin 1 followed by 2-CdA. SCID mice given bryostatin 1 at 75 microg x kg(-1) x d(-1) for 5 days followed by 30 mg x kg(-1) x d(-1) 2-CdA for 5 days in two cycles, had significantly improved tumor growth delay (P = 0.05). We conclude that bryostatin 1 is not only capable of inducing apoptosis by itself, but also sensitizes de novo resistant WSU-CLL cells to the chemo-therapeutic effects of 2-CdA. The bryostatin 1-induced increased ratio of dCK/5'-NT activity and an increased ratio of Bax/Bcl-2 are at least two mechanisms through which this natural compound is able to potentiate the anti-tumor activity of 2-CdA in otherwise resistant CLL cells.
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MESH Headings
- 5'-Nucleotidase/metabolism
- Animals
- Antineoplastic Agents/pharmacology
- Apoptosis/drug effects
- Bryostatins
- Cell Division/drug effects
- Cladribine/pharmacology
- Deoxycytidine Kinase/metabolism
- Drug Synergism
- Female
- Humans
- Lactones/pharmacology
- Leukemia, Lymphocytic, Chronic, B-Cell/enzymology
- Leukemia, Lymphocytic, Chronic, B-Cell/metabolism
- Leukemia, Lymphocytic, Chronic, B-Cell/pathology
- Macrolides
- Mice
- Mice, Inbred ICR
- Mice, SCID
- Proto-Oncogene Proteins/metabolism
- Proto-Oncogene Proteins c-bcl-2/metabolism
- Proto-Oncogene Proteins c-myc/metabolism
- Tumor Cells, Cultured
- Tumor Suppressor Protein p53/metabolism
- bcl-2-Associated X Protein
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Affiliation(s)
- R M Mohammad
- Department of Medicine, Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit, MI 48201, USA
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Hamdy N, Bhatia K, Shaker H, Kamel A, Abou-Enein M, Yassin D, el-Sharkawy N, Magrath I. Molecular epidemiology of acute lymphoblastic leukemia in Egypt. Leukemia 1995; 9:194-202. [PMID: 7845017] [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
We have characterized immunophenotypically defined acute lymphoblastic leukemia (ALL) in Egypt for rearrangements of the antigen receptor genes, and correlated this with rearrangements of ALL-1 and the presence of p53 mutations. Thirty-nine cases were analyzed for rearrangements of the immunoglobulin (Ig) and T-cell receptor (TCR) genes. All precursor B-cell ALLs (12 cases) contained rearranged Ig heavy-chain (JH) region which was biallelic in 92% of these tumors. In addition to JH rearrangements, TCR delta, beta and gamma rearrangements were observed in 80, 40 and 30% of these cases, respectively. TCR genes were invariably rearranged in T-cell ALLs (11 cases). A small fraction (2/11) of T-cell ALL showed concurrent IgJH rearrangement which was monoallelic. Simultaneous rearrangement of IgJH and TCR genes was also observed in both cases of biphenotypic ALL (coexpressing B and T markers). We observed marked heterogeneity in the pattern of rearrangement of antigen receptor genes in mixed-lineage leukemias (ALL coexpressing myeloid-associated markers), including the retention of germline configuration in two cases. Rearrangements of the ALL-1 gene were confined to the leukemias that demonstrated lineage infidelity. Mutations in p53 were infrequent and were present in only three of 47 ALL cases (6%) analyzed; two of these were mixed-lineage leukemias. These results suggest that mixed-lineage and biphenotypic leukemias accumulate pathogenetic lesions that are distinct from B- and T-cell ALL, and that ALL in developing countries includes molecular entities similar to those in developed countries.
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Affiliation(s)
- N Hamdy
- Pediatric Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892
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Bhatia K, Spangler G, Hamdy N, Neri A, Brubaker G, Levin A, Magrath I. Mutations in the coding region of c-myc occur independently of mutations in the regulatory regions and are predominantly associated with myc/Ig translocation. Curr Top Microbiol Immunol 1995; 194:389-98. [PMID: 7895514 DOI: 10.1007/978-3-642-79275-5_45] [Citation(s) in RCA: 6] [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: 01/27/2023]
Abstract
Constitutive expression of c-myc resulting from a chromosomal translocation, which juxtaposes c-myc to an immunoglobulin gene, is a pivotal lesion in Burkitt's lymphomas. This deregulated expression of c-myc is associated with mutations in the regulatory regions, i.e. the first exon and the first intron of c-myc in tumors where the chromosomal breakpoint is not itself within the regulatory region. Until recently it was widely believed that the c-myc protein in these tumors is wild type. We have demonstrated that in a fraction of Burkitt's lymphomas from Africa and from the continental USA, and in mouse plasmacytomas, the c-myc gene carries mutations in the coding region. We now show that, occasionally, such mutations are also present in multiple myelomas--tumors which do not carry translocations or amplifications of c-myc. We also show that the frequency of the c-myc coding region mutations in BL is independent of the frequency of mutations in the regulatory region. These results suggest that the mechanisms that induce missense mutations involving the coding region of c-myc may be different from those that lead to mutations in the regulatory regions.
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Affiliation(s)
- K Bhatia
- Lymphoma Biology Section, NCI, NIH, Bethesda, MD 20892
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Bhatia K, Spangler G, Gaidano G, Hamdy N, Dalla-Favera R, Magrath I. Mutations in the coding region of c-myc occur frequently in acquired immunodeficiency syndrome-associated lymphomas. Blood 1994; 84:883-8. [PMID: 8043869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
We have analyzed 30 cases of high- and intermediate-grade acquired immunodeficiency syndrome-associated non-Hodgkin's lymphoma (AIDS-NHL) for mutations in the c-myc coding region. In addition, in these same tumors, we have sought the presence of mutations in a regulatory region within the first c-myc intron defined by the binding to a factor that inhibits c-myc transcription (MYC intron factor, or mif). Mutations in the c-myc coding region were present in 10 of 16 small noncleaved cell lymphoma (SNCL), but in only 3 of 14 other histologic subtypes tested (0/3 large non-cleaved cell, 2/8 immunoblastic, and 1/3 anaplastic large cell lymphomas). Nineteen of the AIDS-NHLs analyzed contained a c-myc rearrangement and in 10 of these the c-myc gene was mutated in its coding region. In contrast, we could detect a mutation in the coding region in only 2 of 8 AIDS-NHL without a c-myc rearrangement. Mutations in the mif region were detected in 5 of 16 SNCL. Among AIDS-NHL carrying mutations in the c-myc coding region, only 4 carried mutations in the regulatory region. These results suggest that the mutations in the coding region of the c-myc protein may either be a consequence of the translocations involving c-myc, or may be necessary only in tumors where c-myc is deregulated as a result of a c-myc/lg translocation.
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Affiliation(s)
- K Bhatia
- Lymphoma Biology Section, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892
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Bhatia K, Spangler G, Advani S, Kamel A, Hamdy N, Iyer R, Aplan P, Magrath I. Molecular characterization of scl rearrangements in T-cell all from India and egypt. Int J Oncol 1993; 2:725-30. [PMID: 21573616 DOI: 10.3892/ijo.2.5.725] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
SCL gene rearrangement is the most common molecular lesion (25%) identified so far in T-cell acute lymphoblastic leukemia (T-ALL). Since the frequency of T-ALL appears to be relatively higher in developing countries, we wished to determine as to what fraction of T-ALL from this population harbor SCL rearrangements. We show in this study that although the overall frequency of SCL/SIL rearrangements in T-ALL is similar to the Western countries this is at the expense of increased type A rearrangements. Whether the paucity of type B rearrangements reflects a difference in disease etiology in this part of the world is to be determined.
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Affiliation(s)
- K Bhatia
- TATA MEM HOSP,BOMBAY,INDIA. NATL CANC INST,CAIRO,EGYPT
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Cundy T, Hamdy N, Gray R, Jackson B, Kanis JA. Hyperparathyroid bone disease in chronic renal failure. Ulster Med J 1985; 54 Suppl:S34-43. [PMID: 3909581 PMCID: PMC2447966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Much has been learnt over the past 80 years of the pathogenesis and management of hyperparathyroid bone disease in uraemia. Clinically it has changed from a rare disorder of childhood and adolescence to a common and difficult problem in patients maintained on dialysis programmes. Whereas effective treatments are now available for hyperparathyroid bone disease, these are not curative and there is clearly much more work to be done before a full understanding of its pathogenesis, and the best methods of treatment and prevention, can be reached.
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Martin JF, Hamdy N, Nicholl J, Lewtas N, Bergvall U, Owen P, Syder D, Holroyd M. Double-blind controlled trial of prostacyclin in cerebral infarction. Stroke 1985; 16:386-90. [PMID: 3890279 DOI: 10.1161/01.str.16.3.386] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.0] [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
Thirty-two patients with acute cerebral infarction received either prostacyclin or placebo intermittently for 65 hours. Pulse and blood pressure were not altered by prostacyclin. After infusion there was no change in infarct volume or cerebral blood flow in either group. After normalisation for starting values, age and site of cerebral infarction there was a greater than 10% improvement in speech in the prostacyclin group, but minimal changes in neurological score or disability status. Age is related to neurological score at 14 days after stroke by decreasing improvement by 6.8% for each additional 10 years. This study has not been able to demonstrate that prostacyclin is effective in the treatment of ischaemic stroke, but due to the sample size the chance of proving this statistically (the power) was small. Similarly any conclusion that prostacyclin is not effective may be wrong because of the Type II error probability being high.
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