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Chow S, Dale W, Buesing K, Reynolds V, Paloma M, Bishop M, Artz A. Initial experience of a comprehensive geriatric assessment (CGA) before allogeneic hematopoietic cell transplantation (HCT) for patients 60years and older. J Geriatr Oncol 2014. [DOI: 10.1016/j.jgo.2014.09.083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Lanfear DE, Chow S, Padhukasahasram B, Li J, Langholz D, Tang WHW, Williams LK, Sabbah HN. Genetic and nongenetic factors influencing pharmacokinetics of B-type natriuretic peptide. J Card Fail 2014; 20:662-8. [PMID: 24983826 PMCID: PMC4189182 DOI: 10.1016/j.cardfail.2014.06.357] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Revised: 05/30/2014] [Accepted: 06/20/2014] [Indexed: 10/25/2022]
Abstract
BACKGROUND Natriuretic peptides (NPs) represent a critical pathway in heart failure (HF). However, there is wide individual variability in NP system activity, which could be partly genetic in origin. We explored genetic and nongenetic contributions to B-type natriuretic peptide (BNP) inactivation. METHODS Chronic HF patients (n = 95) received recombinant human BNP (nesiritide) at standard doses, and BNP levels were measured at baseline, after 2 hours of infusion, and 30 minutes after discontinuation. Genomic DNA was genotyped for 91 single-nucleotide polymorphisms (SNP) in 2 candidate genes. We tested the association of patient characteristics and genotype with 5 pharmacokinetics (PK) parameters: elimination rate constant, ΔBNP, BNP clearance, adjusted BNP clearance, and half-life. Linear regression with pleiotropic analysis was used to test genotype associations with PK. RESULTS Participants' mean age was 63 years, 44% were female, and 46% were African American. PK parameters varied widely, some >10-fold. HF type (preserved vs reduced) was associated with PK (P < .01), whereas renal function, demographics, and body mass index and were not. Two SNPs in MME (rs989692, rs6798179) and 2 in NPR3 (rs6880564, rs2062708) also had associations with PK (P < .05). CONCLUSIONS The pharmacokinetics of BNP varies greatly in HF patients, differs by HF type, and possibly by MME or NPR3 genotype. Additional study is warranted.
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Chow S, Galvis V, Evans M, Chan K, Spencer-Shaw A, Leach R, Keene E, Shablak A, Shanks J, Thistlethwaite F, Hawkins R. High-Dose Interleukin-2 (Hd Il2) Armed with Pathology-Based Selection Criteria: a Real Option in Treatment of Metastatic Renal Cell Carcinoma (Mrcc) After Targeted Therapy. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu337.39] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Lanfear D, Cabrera-Salinas R, Chow S, Padhukasahasram B, Li J, Langholz D, Wilson Tang W, Williams LK, Sabbah HN. Genetic and Non-Genetic Factors Influencing Pharmacokinetics of B-type Natriuretic Peptide. J Card Fail 2014. [DOI: 10.1016/j.cardfail.2014.06.226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Dey-Rao R, Smith J, Chow S, Sinha A. Differential gene expression analysis in CCLE lesions provides new insights regarding the genetics basis of skin vs. systemic disease. Genomics 2014; 104:144-55. [DOI: 10.1016/j.ygeno.2014.06.003] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2014] [Accepted: 06/15/2014] [Indexed: 01/06/2023]
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Jiang WH, Baker W, Phan P, Chow S. C-REACTIVE PROTEIN DOES NOT PREDICT THERAPEUTIC RESPONSE IN PATIENTS WITH HEART FAILURE: A META-ANALYSIS. J Am Coll Cardiol 2014. [DOI: 10.1016/s0735-1097(14)60787-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Rietdorf E, Chow S, O'Barr S. Complement MAC expression in heart failure. FASEB J 2013. [DOI: 10.1096/fasebj.27.1_supplement.lb480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Wakabayashi T, Suzuki N, Sakai M, Ichii T, Chow S. Phylogenetic relationships among the family Ommastrephidae (Mollusca: Cephalopoda) inferred from two mitochondrial DNA gene sequences. Mar Genomics 2012; 7:11-6. [PMID: 22897957 DOI: 10.1016/j.margen.2012.04.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2011] [Revised: 04/03/2012] [Accepted: 04/17/2012] [Indexed: 11/15/2022]
Abstract
Squids of the family Ommastrephidae are distributed worldwide, and the family includes many species of commercial importance. To investigate phylogenetic relationships among squid species of the family Ommastrephidae, partial nucleotide sequences of two mitochondrial gene loci (cytochrome c oxidase subunit I [1277bp] and 16S rRNA [443bp]) of 15 ommastrephid species and two outgroup species from the families Loliginidae and Enoploteuthidae were determined and used to construct parsimony and distance based phylogenetic trees. The molecular data provided several new phylogenetic inferences. The monophyletic status of three subfamilies (Illicinae, Todarodinae and Ommastrephinae) was well supported, although phylogenetic relationships between the subfamilies were not resolved. Inclusion of a problematic species, Ornithoteuthis volatilis, to Todarodinae was indicated. Within Todarodinae, the Japanese common squid Todarodes pacificus was observed to have much closer relationship to the species of the genus Nototodarus than to its congener (Todarodes filippovae). These results indicate that re-evaluation of several morphological key characters for ommastrephid taxonomy may be necessary.
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Brandwein JM, Hedley DW, Chow S, Schimmer AD, Yee KWL, Schuh AC, Gupta V, Xu W, Kamel-Reid S, Minden MD. A phase I/II study of imatinib plus reinduction therapy for c-kit-positive relapsed/refractory acute myeloid leukemia: inhibition of Akt activation correlates with complete response. Leukemia 2011; 25:945-52. [PMID: 21403650 DOI: 10.1038/leu.2011.34] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
This phase I/II study evaluated imatinib as a c-kit inhibitor combined with mitoxantrone, etoposide and cytarabine therapy for patients with primary refractory or relapsed c-kit+ acute myeloid leukemia (AML). Imatinib was escalated through three dose levels in successive six patient cohorts. The combination was well tolerated up to 400 mg/day imatinib. Of 21 patients treated at this dose, 13 (62%) achieved complete response (CR), 7 (33%) were non-responders and one died during induction. The CR rate was 80% in patients with standard-risk karyotype versus 33% in patients with adverse karyotype. The CR rate for primary non-responders was 6/14 (43%) versus 7/7 (100%) for relapsed patients. AML blasts from peripheral blood were assayed for phosphorylated Akt (pAkt) and phosphorylated ERK (pERK) by flow cytometry before to and after imatinib dosing. Of eight patients achieving CR with reinduction, seven demonstrated marked (≥60%) pAkt inhibition with imatinib therapy. In contrast, all the six non-responders to reinduction demonstrated <60% pAkt inhibition (P=0.005). There was no correlation between pERK inhibition and response to therapy. These results indicate that lack of pAkt inhibition in vivo is associated with resistance to reinduction therapy using this regimen. Further studies using agents that are able to inhibit Akt more effectively are warranted.
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Agostini C, Agudelo PA, Bâ K, Barber PA, Bisol PM, Brouat C, Burgess TI, Calves I, Carrillo Avila M, Chow S, Cordes L, Da Silva D, Dalecky A, De Meester L, Doadrio I, Dobigny G, Duplantier JM, Evison SEF, Ford R, Fresneau D, Galetti PM, Gauthier P, Geldof S, Granjon L, Guérin F, St J Hardy GE, Hernandez Escobar C, Hima K, Hu J, Huang L, Humeau L, Jansen B, Jaquemet S, Jiang ZQ, Jung SJ, Kim BS, Kim CH, Kim JO, Lai CH, Laroche J, Lavergne E, Lawton-Rauh A, Le Corre M, Leach MM, Lee J, Leo AE, Lichtenzveig J, Lin L, Linde CC, Liu SF, Marino IAM, McKeown NJ, Nohara K, Oh MJ, Okamoto H, Oliver R, Olivera Angel M, Ornelas-García CP, Orsini L, Ostos Alfonso H, Othman AS, Papetti C, Patarnello T, Pedraza-Lara C, Piller KR, Poteaux C, Requier JB, Roziana MK, Semba Y, Sembene M, Shah RM, Shahril AR, Shao A, Shaw PW, Song L, Souza Ferreira R, Su YQ, Suzuki N, Tatard C, Taylor KM, Taylor PWJ, Thiam M, Valbuena R, Wang H, Yang BG, Yuan Q, Zajonz U, Zane L, Zhu L, Zhuang ZM, Zulaiha AR. Permanent genetic resources added to Molecular Ecology Resources Database 1 October 2010-30 November 2010. Mol Ecol Resour 2011; 11:418-21. [PMID: 21429157 DOI: 10.1111/j.1755-0998.2010.02970.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
This article documents the addition of 277 microsatellite marker loci to the Molecular Ecology Resources Database. Loci were developed for the following species: Ascochyta rabiei, Cambarellus chapalanus, Chionodraco hamatus, Coptis omeiensis, Cynoscion nebulosus, Daphnia magna, Gerbillus nigeriae, Isurus oxyrinchus, Lates calcarifer, Metacarcinus magister, Oplegnathus fasciatus, Pachycondyla verenae, Phaethon lepturus, Pimelodus grosskopfii, Rotylenchulus reniformis, Scomberomorus niphonius, Sepia esculenta, Terapon jarbua, Teratosphaeria cryptica and Thunnus obesus. These loci were cross-tested on the following species: Austropotamobius italicus, Cambarellus montezumae, Cambarellus puer, Cambarellus shufeldtii, Cambarellus texanus, Chionodraco myersi, Chionodraco rastrospinosus, Coptis chinensis, Coptis chinensis var. brevisepala, Coptis deltoidea, Coptis teeta, Orconectes virilis, Pacifastacus leniusculus, Pimelodus bochii, Procambarus clarkii, Pseudopimelodus bufonius, Rhamdia quelen, Sepia andreana, Sepiella maindroni, Thunnus alalunga, Thunnus albacares, Thunnus maccoyii, Thunnus orientalis, Thunnus thynnus and Thunnus tonggol.
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Chow S, Mullan B. Predicting food hygiene. An investigation of social factors and past behaviour in an extended model of the Health Action Process Approach. Appetite 2010; 54:126-33. [DOI: 10.1016/j.appet.2009.09.018] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2009] [Revised: 09/17/2009] [Accepted: 09/30/2009] [Indexed: 10/20/2022]
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Carter L, Chow S, Scott D, Hartshorn G, Califano R, Blackhall F. Smoking in teenagers. Lung Cancer 2010. [DOI: 10.1016/s0169-5002(10)70120-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Ramanathan RK, Dragovich T, Richards D, Stephenson J, Pestano L, Hiscox A, Leos R, Chow S, Millard J, Kirkpatrick L. Results from phase Ib studies of PX-12, a thioredoxin inhibitor in patients with advanced solid malignancies. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.2571] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
2571 Background: PX-12, a small-molecule inhibitor of Thioredoxin-1 (Trx-1) stimulates apoptosis, down-regulates HIF- 1α, VEGF in animal models. High levels of Trx-1 have been linked to chemoresistance in lung cancers. The phase 2 dose of PX-12 was 226 mg/m2 given by 3-h infusion IV x 5 days, q 21d (Ramanathan RK et al. CCR 13; 2109; 2007). Two Phase 1b trials of PX-12 in patients with advanced solid tumors have been completed to determine the safety, tolerability and optimal biologic dose when delivered by prolonged infusion. Methods: PX-12 was administered as a 24-h infusion every q7- 14d starting at 150 mg/m2/day (n=18); or a 72-h infusion q 21d, starting at 300 mg/m2/day (n=14) using a portable delivery pump. Results: Both the 24- or 72-h infusion of PX-12 were well tolerated in patients at doses up to 400 mg/m2/day. Common grade 1/2 AE's included fatigue, taste alteration, and odor caused by expired drug metabolite. In the 24 h study the maximal dose evaluated was 450 mg/m2. No DLTs were observed in this study. Since no MTD was reached on 24-h infusion up to 450 mg/m2 dose level, additional higher doses were explored utilizing 72-h infusion. DLT in the 72-h study at the highest dose administered (500 mg/m2/day) included reversible hypoxia with or without pneumonitis. Best response was stable disease in 3 pts (SD): liver cancer and colon cancer (24-h infusion) and rectal cancer (72-h infusion). Pharmacodynamics (PD): PX- 12 lowered circulating Trx-1 levels in patients who had starting Trx-1 levels 3-fold greater than that of the normal population (5.4 ng/mL) including all three SD. Circulating VEGF and FGF-2 levels were also lowered over multiple courses of treatment in these patients. The pharmacokinetics of PX-12 showed a dose dependent increase of Cmax and no accumulation over multiple cycles following a 24 h infusion. Conclusions: Dosing at 400 mg/m2/day appears safe and tolerable as a 24–72-h infusion. Extending the infusion time to 72h appears to decrease the intensity of cough and odor compared to bolus 1–3 h infusion. The PD effect produced by PX-12 was apparent only in those patients with elevated plasma Trx-1 levels. Patients with elevated TRX-1 levels appear to have the best probability of having SD. Supported by ProlX Pharmaceuticals/Oncothyreon through an award from the NCI. [Table: see text]
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Chow S, Ueno Y, Toyokawa M, Oohara I, Takeyama H. Preliminary analysis of length and GC content variation in the ribosomal first internal transcribed spacer (ITS1) of marine animals. MARINE BIOTECHNOLOGY (NEW YORK, N.Y.) 2009; 11:301-306. [PMID: 18937008 DOI: 10.1007/s10126-008-9153-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2008] [Accepted: 09/25/2008] [Indexed: 05/26/2023]
Abstract
Length and guanine-cytosine (GC) content of the ribosomal first internal transcribed spacer (ITS1) were compared across a wide variety of marine animal species, and its phylogenetic utility was investigated. From a total of 773 individuals representing 599 species, we only failed to amplify the ITS1 sequence from 87 individuals by polymerase chain reaction with universal ITS1 primers. No species was found to have an ITS1 region shorter than 100 bp. In general, the ITS1 sequences of vertebrates were longer (318 to 2,318 bp) and richer in GC content (56.8% to 78%) than those of invertebrates (117 to 1,613 bp and 35.8% to 71.3%, respectively). Specifically, gelatinous animals (Cnidaria and Ctenophora) were observed to have short ITS1 sequences (118 to 422 bp) with lower GC content (35.8% to 61.7%) than the other animal taxa. Mollusca and Crustacea were diverse groups with respect to ITS1 length, ranging from 108 to 1,118 and 182 to 1,613 bp, respectively. No universal relationship between length and GC content was observed. Our data indicated that ITS1 has a limited utility for phylogenetic analysis as obtaining confident sequence alignment was often impossible between different genera of the same family and even between congeneric species.
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Jackevicius CA, Page RL, Chow S, Dunn SP, Lee CR, Ng TMH, Rodgers JE, Vardeny O, Wiggins BS, Munger MA. High-Impact Articles Related to the Management of Heart Failure: 2008 Update. Pharmacotherapy 2009; 29:82-120. [DOI: 10.1592/phco.29.1.82] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Chow S, Pope JE, Mehta S. Lack of correlation of the health assessment questionnaire disability index with lung parameters in systemic sclerosis associated pulmonary arterial hypertension. Clin Exp Rheumatol 2008; 26:1012-1017. [PMID: 19210864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
OBJECTIVE Pulmonary arterial hypertension (PAH) affects the quality of life (QoL) and the ability to perform the activities of daily living (ADLs) in patients with systemic sclerosis (SSc). We determined whether the Health Assessment Questionnaire-Disability Index (HAQ-DI), a self-assessment measure of function, correlates with a patient's PAH status in a population of SSc patients with PAH. METHODS Forty-one patients from one centre with systemic scleroderma, dyspnea and PAH were included. All patients filled in a HAQ-DI, and underwent evaluation with pulmonary function tests (PFTs), 6-minute walk distance (6MWD), degree of dyspnea (Borg dyspnea index), NYHA functional class, and expert PAH physician global assessment every 6 months. Change in HAQ DI was studied to determine relationship to changes in PAH. RESULTS The HAQ-DI scores had no significant correlation with PAH, including NYHA functional class (r=0.38, p=0.39), Borg dyspnea index (r=0.60, p=0.37), 6MWD (r=-0.04, p=0.86), % predicted DLCO (r=0.31, p=0.25), % predicted FVC (r=0.02, p=0.93), and expert PAH physician global assessment (r=0.06, p=0.97). CONCLUSION HAQ-DI is not an adequate measure of PAH status in SSc patients with PAH. Although PAH causes severe morbidity and death, changes in PAH severity were not reflected in an overall functional status change as assessed by the HAQ-DI. Thus, HAQ-DI changes do not reflect PAH status in SSc.
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Abstract
A number of fundamentally important biological processes, such as cell signaling and the initiation of mitosis, are accompanied by a change in intracellular pH. Flow cytometric measurement of pH is a generally straightforward procedure that can be done with any instrument equipped with a 488-nm argon laser. The overall approach is similar to that for calcium: generation of a calibration curve by imparting known changes in pH and interpolation of the test sample pH. This unit presents the traditional calibration method using high-potassium buffers and the proton ionophore nigericin and a more recently developed technique, the pseudo null method, which involves resuspension of cells in defined mixtures of weak acids and weak bases.
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Chow S, Yates DH, Thomas PS. Reproducibility of exhaled breath condensate markers. Eur Respir J 2008; 32:1124-6. [DOI: 10.1183/09031936.00085408] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Krishnan A, Chow S, Thomas P, Glanville A, Yates D. 531: Longitudinal Analysis of Exhaled Breath Condensate Biomarkers after Lung Transplantation. J Heart Lung Transplant 2008. [DOI: 10.1016/j.healun.2007.11.545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Liu J, Conrad DH, Chow S, Tran VH, Yates DH, Thomas PS. Collection devices influence the constituents of exhaled breath condensate. Eur Respir J 2008; 30:807-8. [PMID: 17906090 DOI: 10.1183/09031936.00080207] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Brufsky A, Chow S, Kapoor A, Bhargava R, Surti U, Rosenzweig M. Women with Her2 unamplified but chromosome 17 hyperploid metatstatic breast cancer (MBC) respond to traztuzumab. J Clin Oncol 2007. [DOI: 10.1200/jco.2007.25.18_suppl.21051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
21051 Background: Guidelines for the interpretation of Her2 testing by FISH in determining therapy for Her2 positive metatstatic breast cancer generally suggest that only women with Her2 to chromosome 17 (CEP 17) amplification ratios of greater than 2.0 will benefit from traztuzumab. However, hyperploidy of chromosome 17 may lead to increased Her2 copy number despite a normal HER2/CEP 17 ratio, which may also predict response. We sought to examine hyperploid frequency in a well defined Her2 positive MBC population. We also sought to determine the time to progression (TTP) on first chemotherapy for MBC in such women, as well as their overall survival (OS) with MBC. Methods: A tissue mircoarray (TMA) with 3-fold redundancy was constructed using 0.6mm cores from primary or metatstatic paraffin embedded tumor from 124 cases which were Her2 2+ or 3+ by IHC, or amplified by FISH, on pathology report. Four micron thick TMA sections were used for HER2 IHC and HER2 FISH analysis. HER2/CEP 17 ratios of 2.0 or more was considered as amplification. If the tumor was 2+ or 3+ by IHC, greater than or equal to 3 signals for chromosome 17 were seen in a majority of cell nuclei, and the HER2/CEP17 ratio was less than 2.0, the tumor was considered hyperploid Her2 FISH negative. Results: Tissue blocks from 52 tumors delivered clearly interpretable amplification for Her2 by FISH. An additional 10 tumors (8%) were hyperploid, IHC positive (2+ or 3+), and FISH negative. Median survival (Kaplan-Meier) was 39 months (95% CI, 21–62) for women with hyperploid FISH negative tumors and 41 months (95% CI, 25–53) for women with FISH positive tumors (p=0.63, NS, Wilcoxon). Median time to progression (Kaplan-Meier) on first therapy for metastatic disease was 14 months (95% CI, 8–20) for hyperploid FISH negative tumors and 15 months (95% CI, 12–18) for women with FISH positive tumors (p=0.41, NS, Wilcoxon). Conclusions: In this analysis, women with hyperploid Her2 FISH negative IHC positive tumors had similar TTP and OS as women with Her2 FISH positive tumors. These women, although Her2 FISH negative, appeared to respond well to traztuzumab. These provocative results should be repeated on larger data sets. No significant financial relationships to disclose.
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Kapoor A, Chow S, Bhargava R, Surti U, Rosenzweig M, Vuga M, Brufsky A. Topoisomerase II-alpha (TOP2A) gene co-amplification does not predict response to therapy and survival in Her-2 neu positive metastatic breast cancer. J Clin Oncol 2007. [DOI: 10.1200/jco.2007.25.18_suppl.21108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
21108 Background: Preliminary data from a phase III trial of adjuvant traztuzumab (BCIRG, SABCS 2005, abstract 1045) suggested that co-amplification of the genes for HER2 and topisomerase II alpha (TOP2A) on chromosome 17 resulted in improved disease free survival with chemotherapy regimens containing both and anthracycline and traztuzumab. We sought to determine if co-amplification of HER2 and TOP2A was a predictor of response and benefit (or lack thereof) to herceptin containing chemotherapy in the metastatic setting, since few women receive both therapies concurrently for MBC. Methods: A tissue mircoarray (TMA) with 3-fold redundancy was constructed using 0.6mm cores from primary or metatstatic paraffin embedded tumor from 124 cases from Magee-Women's Hospital which were Her2 2+ or 3+ by IHC, or amplified by FISH, on pathology report. Four micron thick TMA sections were used for HER2 immunohistochemical (CB11 monoclonal antibody, Ventana Medical Systems, Tucson, AZ) and HER2 and TOP2A FISH analysis (HER2/CEP 17 and TOP2A/CEP 17 dual color probes from Vysis Inc. Downers Grove, IL). HER2 (or TOP2A) gene to chromosome 17 ratios of 2.0 or more was considered as amplification. Results: Tissue blocks from 52 tumors delivered clearly interpretable amplification for Her2 by FISH on reanalysis. The remaining 72 tumors are undergoing further reanalysis. Of the 52 tumors with Her2 amplification, 15 (29%) had co- amplification of TOP2A. Median survival was 44 months (95% CI, 31–69) for women with TOP2A coamplified tumors and 35 months (95% CI, 29- 63) for women with non-coamplified tumors (p=0.448, NS). Median time to progression on first therapy was 17 months (95% CI, 14–20) for women with TOP2A coamplified tumors and 15 months (95% CI, 12–17) for women with non-coamplified tumors (p=0.939, NS) Conclusions: In this analysis, TOP2A and HER2 gene co-amplification did not correlate with worse TTP on first metatstatic therapy or worse OS from metatstatic disease. No significant financial relationships to disclose.
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Krishnan A, Thomas P, Chow S, Sandrini A, Plit M, Malouf M, Glanville A, Yates D. 63. J Heart Lung Transplant 2006. [DOI: 10.1016/j.healun.2005.11.067] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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Rizzo C, Fotino M, Zhang Y, Chow S, Spizuoco A, Sinha AA. Direct characterization of human T cells in pemphigus vulgaris reveals elevated autoantigen-specific Th2 activity in association with active disease. Clin Exp Dermatol 2005; 30:535-40. [PMID: 16045688 DOI: 10.1111/j.1365-2230.2005.01836.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Pemphigus vulgaris (PV) is a blistering skin disorder mediated by autoantibodies targeting the epidermal adhesion molecule desmoglein 3 (Dsg3). As Th2-associated cytokines are necessary for directing antibody production, it is hypothesized that Dsg3-specific Th2 activity is associated with active disease. We used cell-surface-matrix technology in combination with flow cytometry to characterize the Dsg3-reactive T-cell population using peripheral blood mononucleocytes sampled from PV patients stratified by active (n = 9) or remittent disease (n = 6), and healthy human leucocyte antigen-matched controls (n = 5). We evaluated interferon-gamma-producing CD4+ cells (Th1) and interleukin (IL)-10- or IL-4-producing CD4+ cells (Th2). The mean frequency of Th2 CD4+ T cells was significantly elevated for five of nine PV patients with active disease. No significant Th2 responses were detected for patients with remittent disease or controls. There was a significant association of Th2 activity with active disease compared with remittent and control groups (P = 0.026 and P =0.012, respectively), and Th2 activity was significantly correlated with anti-Dsg3 IgG titre (P = 0.044). One patient with remittent disease converted from a Th2-negative to a Th2-positive response with the initiation of disease activity. An antigen-specific CD4- lymphocyte response was detected in five PV patients (36%), and was shown to correlate closely with the CD8+ population. These results are consistent with the hypothesis that Th2 response directs autoantibody production and is therefore associated with disease activity in PV.
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