Publications by authors named "Cheng Quah"

Article Synopsis
  • KIN-3248 is an oral FGFR1-4 inhibitor designed to overcome resistance caused by secondary mutations in FGFR genes, targeting patients with advanced solid tumors.
  • A phase I clinical trial evaluated its safety and optimal dosage in 54 patients, primarily with intrahepatic cholangiocarcinoma and FGFR2/3 gene alterations, producing a few partial responses and manageable side effects.
  • The trial was halted early for commercial reasons, preventing the determination of maximum tolerated dose, but initial results indicate KIN-3248 is safe and effective in targeting resistant FGFR mutations.
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B-cell receptor signalling inhibition by targeting Bruton tyrosine kinase (BTK) is effective in treating chronic lymphocytic leukemia (CLL). The BTK inhibitor ibrutinib may be intolerable for some patients. Acalabrutinib is a more selective BTK inhibitor that may be better tolerated by patients who are intolerant to ibrutinib.

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Purpose: Acalabrutinib, a highly selective, potent, Bruton tyrosine kinase inhibitor, was evaluated in this global, multicenter, randomized, open-label, phase III study in patients with relapsed/refractory (R/R) chronic lymphocytic leukemia (CLL).

Methods: Eligible patients, aged ≥ 18 years with R/R CLL, were randomly assigned 1:1 centrally and stratified by del(17p) status, Eastern Cooperative Oncology Group performance status score, and number of prior lines of therapy. Patients received acalabrutinib monotherapy or investigator's choice (idelalisib plus rituximab [I-R] or bendamustine plus rituximab [B-R]).

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Acalabrutinib is a selective irreversible Bruton tyrosine kinase (BTK) inhibitor that does not affect IL2-associated tyrosine kinase or antibody-dependent cellular cytotoxicity, making it an attractive candidate for combination therapy with anti-CD20 antibodies. We investigated acalabrutinib plus obinutuzumab in a phase Ib/II study (NCT02296918) of patients with treatment-naïve or relapsed/refractory chronic lymphocytic leukemia (CLL). Nineteen treatment-naïve and 26 relapsed/refractory patients were treated with acalabrutinib (100 mg twice daily) until progression and obinutuzumab (cycle 1: 100 mg day 1, 900 mg day 2, 1000 mg days 8 and 15; cycles 2-6: 1,000 mg day 1).

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Aim: MERiDiAN evaluated plasma vascular endothelial growth factor-A (pVEGF-A) prospectively as a predictive biomarker for bevacizumab efficacy in metastatic breast cancer (mBC).

Methods: In this double-blind placebo-controlled randomised phase III trial, eligible patients had HER2-negative mBC previously untreated with chemotherapy. pVEGF-A was measured before randomisation to paclitaxel 90 mg/m on days 1, 8 and 15 with either placebo or bevacizumab 10 mg/kg on days 1 and 15, repeated every 4 weeks until disease progression, unacceptable toxicity or consent withdrawal.

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Article Synopsis
  • Understanding HER2 status is crucial for treating early-stage breast cancer, as it guides HER2-directed therapies.
  • A study at Huntsman Cancer Institute analyzed HER2 testing patterns before and after the 2007 ASCO/CAP guidelines, finding a HER2+ rate of 17% among 1,459 women.
  • The results showed a shift in testing classifications with fewer tumors identified as IHC3+ and more as IHC2+ post-guidelines, while reflex testing revealed a 10% increase in detected HER2+ cases.
  • These findings highlight the importance of updated guidelines in influencing HER2 testing accuracy and patient treatment decisions.
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Improvements in screening and adjuvant therapy for breast cancer are associated with decreased recurrence, which may have the effect of increasing the proportion of patients presenting with first-line de novo versus recurrent metastatic breast cancer (MBC). Here, we describe and compare patients with de novo versus recurrent human epidermal growth factor 2 (HER2)-positive MBC. registHER was a prospective observational cohort study (late 2003-early 2006) of 1,023 patients with HER2-positive MBC.

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Background: Limited data are available describing the natural history of patients with HER2-positive and hormone receptor (HR)-positive metastatic breast cancer (MBC). We examined first-line treatment patterns and clinical outcomes in patients with HER2-positive, HR-positive MBC in a real-world setting.

Methods: registHER is a prospective, observational cohort of 1,023 patients with HER2-positive MBC diagnosed within 6 months of enrollment and followed until death, disenrollment, or June 2009 (median follow-up time: 27 months).

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Limited data exist regarding treatment patterns and outcomes in elderly patients with HER2-positive metastatic breast cancer (MBC). registHER is an observational study of patients (N = 1,001) with HER2-positive MBC diagnosed within 6 months of enrollment and followed until death, disenrollment, or June 2009 (median follow-up 27 months). Outcomes were analyzed by age at MBC diagnosis: younger (<65 years), older (65-74 years), elderly (≥75 years).

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Background: Erythrocytes are transfused to treat or prevent imminent inadequate tissue oxygenation. 2,3-diphosphoglycerate concentration decreases and oxygen affinity of hemoglobin increases (P50 decreases) with blood storage, leading some to propose that erythrocytes stored for 14 or more days do not release sufficient oxygen to make their transfusion efficacious. The authors tested the hypothesis that erythrocytes stored for 3 weeks are as effective in supplying oxygen to human tissues as are erythrocytes stored for less than 5 h.

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