Bibliografías: "Lobular breast cancer, prognosis, next-generation sequencing"

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O'Keefe, Kaitlyn, Andrew Elliott, Chad Livasy, Meghan Steiner, Irene Kang, Dave S. B. Hoon, Wolfgang Michael Korn et al. "HER2 alterations and prognostic implications in all subtypes of breast cancer." Journal of Clinical Oncology 40, n.º 16_suppl (1 de junio de 2022): 1041. http://dx.doi.org/10.1200/jco.2022.40.16_suppl.1041.

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1041 Background: Amplification or overexpression of human epidermal growth factor receptor 2 (HER2) oncogene is present in about 15-20% of breast cancers & is a prognostic & predictive biomarker. Additional ERBB2/HER2 alterations have become apparent on tumor next generation sequencing (NGS), including activating kinase domain mutations & fusions. Methods: DNA NGS (592 gene panel or whole exome) data from 12,153 breast samples retrospectively reviewed for ERBB2 alterations with RNA whole-transcriptome sequencing (WTS) data available for 7289 (60%) samples. Gene fusions detected using the ArcherDx fusion assay or WTS. Clinicopathologic features were described including breast cancer subtype, age, & biopsy site. HER2 status determined according to 2018 ASCO-CAP guideline. Overall survival obtained from insurance claims & Kaplan-Meier estimates were calculated for defined patient (pt) cohorts. Statistical significance was determined using Chi-square & Wilcoxon rank sum tests. Results: ERBB2 mutations ( ERBB2mts) were identified in 3.2% (n = 388) of tumors overall & most common in liver metastases (113/1972, 5.7%). ERBB2mts were found more in breast lobular tumors compared to ductal tumors (10 vs 2.1%, p < 0.001). HER2+ tumors had higher frequency of ERBB2mts compared to HER2- (4.3 vs 3%, p = 0.028). Tumors with score of 0 by immunohistochemistry demonstrated lower rate of ERBB2mts (0+ 2.2%, 1+ 3.5%, 2+ 4.5%, 3+ 3.45%, p < 0.05). Among HER2- tumors, ERBB2mts were present in 3.6% of hormone receptor (HR)+/HER2- & 1.9% of TNBC. Metastatic tumors had a higher rate of ERBB2mts compared to locoregional breast tumors (3.8 vs 2%, p < 0.001), with increased rates of activating mutations S310F (0.1 vs 0.0%, p < 0.05) & D769H (0.3 vs 0.1%, p < 0.05), & the resistance mutation L755S (1.2 vs 0.6%, p < 0.01). Compared to ERBB2-WT, ERRB2mts were associated with decreased ERBB2 transcripts levels in HER2+ samples (222 vs 441 transcripts per million [TPM], p < 0.001) & increased levels in HER2- samples (73 vs 35 TPM, p < 0.001). High tumor mutational burden (≥ 10 mut/Mb) & ERBB3 mutations were more common in ERBB2mts compared to ERRB2-WT (16.7 vs 7.7%, p < 0.001; 10.6 vs 0.8%, p < 0.001). ERBB2 fusions were rare (0.49%) with 97% occurring in HER2+ tumors. Of 8358 pts with outcome data, prognosis (HR 1.2, P = 0.06) & response to chemotherapy (HR 1.1, P = 0.42) was similar between pts with HER2- ERBB2mt & ERBB2-WT. Conclusions: ERBB2mts & fusions were observed in all breast cancer subtypes - more commonly in HER2+, metastatic, & lobular histology tumors - & did not influence prognosis. These alterations may reflect response to treatment pressures in HER2+ disease to reactivate HER2-mediated growth pathways following anti-HER2 therapy & may represent a targetable upregulated oncogenic pathway in HER2- disease. Ongoing identification of ERBB2 alterations may augment treatment options for breast cancer pts & clinical outcomes from this approach are under investigation.

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O'Keefe, Kaitlyn, Andrew Elliott, Chad Livasy, Meghan Steiner, Irene Kang, Dave S. B. Hoon, Wolfgang Michael Korn et al. "HER2 alterations and prognostic implications in all subtypes of breast cancer." Journal of Clinical Oncology 40, n.º 16_suppl (1 de junio de 2022): 1041. http://dx.doi.org/10.1200/jco.2022.40.16_suppl.1041.

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1041 Background: Amplification or overexpression of human epidermal growth factor receptor 2 (HER2) oncogene is present in about 15-20% of breast cancers & is a prognostic & predictive biomarker. Additional ERBB2/HER2 alterations have become apparent on tumor next generation sequencing (NGS), including activating kinase domain mutations & fusions. Methods: DNA NGS (592 gene panel or whole exome) data from 12,153 breast samples retrospectively reviewed for ERBB2 alterations with RNA whole-transcriptome sequencing (WTS) data available for 7289 (60%) samples. Gene fusions detected using the ArcherDx fusion assay or WTS. Clinicopathologic features were described including breast cancer subtype, age, & biopsy site. HER2 status determined according to 2018 ASCO-CAP guideline. Overall survival obtained from insurance claims & Kaplan-Meier estimates were calculated for defined patient (pt) cohorts. Statistical significance was determined using Chi-square & Wilcoxon rank sum tests. Results: ERBB2 mutations ( ERBB2mts) were identified in 3.2% (n = 388) of tumors overall & most common in liver metastases (113/1972, 5.7%). ERBB2mts were found more in breast lobular tumors compared to ductal tumors (10 vs 2.1%, p < 0.001). HER2+ tumors had higher frequency of ERBB2mts compared to HER2- (4.3 vs 3%, p = 0.028). Tumors with score of 0 by immunohistochemistry demonstrated lower rate of ERBB2mts (0+ 2.2%, 1+ 3.5%, 2+ 4.5%, 3+ 3.45%, p < 0.05). Among HER2- tumors, ERBB2mts were present in 3.6% of hormone receptor (HR)+/HER2- & 1.9% of TNBC. Metastatic tumors had a higher rate of ERBB2mts compared to locoregional breast tumors (3.8 vs 2%, p < 0.001), with increased rates of activating mutations S310F (0.1 vs 0.0%, p < 0.05) & D769H (0.3 vs 0.1%, p < 0.05), & the resistance mutation L755S (1.2 vs 0.6%, p < 0.01). Compared to ERBB2-WT, ERRB2mts were associated with decreased ERBB2 transcripts levels in HER2+ samples (222 vs 441 transcripts per million [TPM], p < 0.001) & increased levels in HER2- samples (73 vs 35 TPM, p < 0.001). High tumor mutational burden (≥ 10 mut/Mb) & ERBB3 mutations were more common in ERBB2mts compared to ERRB2-WT (16.7 vs 7.7%, p < 0.001; 10.6 vs 0.8%, p < 0.001). ERBB2 fusions were rare (0.49%) with 97% occurring in HER2+ tumors. Of 8358 pts with outcome data, prognosis (HR 1.2, P = 0.06) & response to chemotherapy (HR 1.1, P = 0.42) was similar between pts with HER2- ERBB2mt & ERBB2-WT. Conclusions: ERBB2mts & fusions were observed in all breast cancer subtypes - more commonly in HER2+, metastatic, & lobular histology tumors - & did not influence prognosis. These alterations may reflect response to treatment pressures in HER2+ disease to reactivate HER2-mediated growth pathways following anti-HER2 therapy & may represent a targetable upregulated oncogenic pathway in HER2- disease. Ongoing identification of ERBB2 alterations may augment treatment options for breast cancer pts & clinical outcomes from this approach are under investigation.

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Ward, Elspeth, Anna Blümel, Emer Conroy, Grainne Cremin, Binbin Gao, William Gallagher, Idalia Cruz et al. "Abstract PD14-07: Bromodomain and Extra-Terminal motif (BET) inhibitors are a rational therapeutic choice for treatment of invasive lobular carcinoma". Cancer Research 82, n.º 4_Supplement (15 de febrero de 2022): PD14–07—PD14–07. http://dx.doi.org/10.1158/1538-7445.sabcs21-pd14-07.

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Abstract Invasive lobular carcinoma (ILC) is the second most common type of breast cancer accounting for approximately 10-15% of all breast tumours. ILC is characterized by inactivation of E-Cadherin and cancer cells that invade the stroma in a "single-file" pattern. Women with ILC are more likely to have hormone receptor-positive disease. ILCs are three times more likely to metastasize to the peritoneum, gastrointestinal tract, and ovaries. ILC are currently treated in the same manner as all other ER+ breast cancers. Like invasive ductal carcinoma (IDC), anti-estrogen resistance has emerged as a significant problem in the management of ILC. Approximately half of the recurrences of ER+ breast tumors respond to anti-endocrine treatment, while the other half are resistant. Additionally, anti-estrogen-resistant breast tumor cells appear to have/acquire a more aggressive, invasive phenotype compared to their anti-estrogen-responsive counterparts. ILC is considered to be chemo-resistant and ILC patients receive no additional benefit from adjuvant chemotherapy. As such, there is a pressing need to develop tailored therapeutic options for endocrine-resistant ILC patients. The bromodomain and extra-terminal (BET) motif family are epigenetic readers that bind to acetylated histones, recruiting co-factors to regulate transcription. As part of the FP7 RATHER project aimed at identifying rational treatment options for ILC, we discovered that BRD3 (uniquely among the BET family members) is a marker of poor prognosis in ILC but not in ER+ breast cancers as a whole. We subsequently validated this in an independent cohort from the METABRIC study. These data suggest that Brd3 may play a significant role in tumour progression in ILC and may be a rational therapeutic target for lobular tumours. Using the two ILC cell lines SUM44PE (SUM44) and MDA MB 134 VI (MM134) previously shown to be anti-endocrine resistant we assessed the therapeutic potential of BET inhibition. We found that ILC cell lines that do not respond to anti-endocrine therapy are sensitive to a panel of BET inhibitors in both 2D and 3D assays. In particular the BET inhibitors JQ1 and Mivebresib had the highest potency, these BET inhibitors were selected for further research. Next, a multi-omics approach merging RNA-sequencing with mass spectrometry was utilised to dissect the transcriptional networks employed by BET inhibitors in this ILC setting. RNA-sequencing revealed dysregulated pathways in cell cycle division, DNA damage, apoptosis and MAPK signalling following treatment. Further, rapid immunoprecipitation mass spectrometry of endogenous proteins (RIME) was carried out to find the binding partners of the BRD proteins. Integrated pathway analysis through Genome Enhancer was used to assess the master regulators (MTRs) which drive BET inhibitor function. There was 142 MTRs found across the two cell lines treated with both inhibitors. Of note the MTR, FGFR3, was shown to regulate the downstream targets of both BET inhibitors. Further analysis of BET inhibition combined with erdafitinib, an FGFR inhibitor, drives increased cell inhibition compared to either agent alone. Finally, the efficacy of JQ1 in targeting ILC was assessed in vivo. We utilised the ILC cell-derived xenograft (CDX) models established by mammary intraductal implantation. The efficacy of BET inhibition alone and in combination with anti-endocrine therapies, tamoxifen and fulvestrant were assessed in the MM134 cell line. We found that JQ1 works synergistically with tamoxifen to significantly decrease tumour burden and metastatic potential in this tamoxifen resistant ILC model. Taken together this data highlights the need for tailored therapeutics in ILC research and highlights the use of BET inhibition in the anti-endocrine resistant ILC setting. Citation Format: Elspeth Ward, Anna Blümel, Emer Conroy, Grainne Cremin, Binbin Gao, William Gallagher, Idalia Cruz, Leena Hilakivi-Clarke, George Sflomos, Cathrin Brisken, Darran O'Connor. Bromodomain and Extra-Terminal motif (BET) inhibitors are a rational therapeutic choice for treatment of invasive lobular carcinoma [abstract]. In: Proceedings of the 2021 San Antonio Breast Cancer Symposium; 2021 Dec 7-10; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2022;82(4 Suppl):Abstract nr PD14-07.

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Carbognin, Luisa, Michele Simbolo, Caterina Vicentini, Isabella Sperduti, Anna Caliò, Francesco Schettini, Maria Vittoria Dieci et al. "Next-generation targeted sequencing (NGTS) investigating CDK4 as a prognostic driver in pure invasive lobular breast carcinoma (ILC): Preliminary results in early-stage patients (pts) stratified according to a validated clinico-pathological model." Journal of Clinical Oncology 36, n.º 15_suppl (20 de mayo de 2018): 542. http://dx.doi.org/10.1200/jco.2018.36.15_suppl.542.

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Louie, Anna D., Rani Chudasama, Sharon Wu, Marzia Capelletti, Daniel Magee, W. Michael Korn, Virginia Kaklamani et al. "Abstract PD6-04: Mutational landscape and immune infiltration of breast cancer metastases to gynecologic and other organs". Cancer Research 82, n.º 4_Supplement (15 de febrero de 2022): PD6–04—PD6–04. http://dx.doi.org/10.1158/1538-7445.sabcs21-pd6-04.

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Abstract Introduction: Breast cancer metastases (BCM), which cause most breast cancer (BC)-associated mortality, have increased genetic complexity compared to early-stage disease. However, the contribution of genetic alterations to site of BCM is not well-understood. Different breast cancer subtypes have varying patterns of BCM, e.g., lobular carcinoma more frequently spreads to gynecologic (Gyn) organs and the GI tract, perhaps hinting at selection pressures wherein some organs are hospitable to tumors with certain genetic alterations. Methods: Relationships between BCM site and mutations detected by DNA next-generation sequencing (NGS; NextSeq 592 gene panels or NovaSeq whole exome sequencing) were investigated using 12,464 BC samples sequenced at Caris Life Sciences (sample sizes, Table 1). PD-L1 expression was tested through IHC (Clone SP-142 (cut-off ≥1, 1%)). Tumor mutational burden (TMB) was measured by totaling somatic mutations per tumor (high ≥ 10 mutations per MB). Immune cell fractions were calculated by deconvolution of whole-transcriptome data (NovaSeq) using Quantiseq (reference). Statistical significance was determined using chi-square and Wilcoxon rank sum tests adjusted for multiple comparisons. Results: Compared to primary breast tumors, BCM had increased frequency of TMB-H (10.08% vs. 4.94%), decreased PD-L1 positivity (21.09% vs. 35.82%), and were enriched for PIK3CA (34.62% vs 30.53%) and ESR1 mutations (13.34% vs 2.17%) (all P<0.001). PD-L1 positivity was highest in BCM to lymph nodes (43.06%) and axilla (39.77%). BCM to Gyn organs had more lobular histology, the highest rate of hormone receptor (HR)+ tumors (77.17%), and rarely had high TMB (6.73%) or were PD-L1 positive (11.39%). Double dendrogram hierarchical clustering of BCM site by mutation frequency and pathway alterations revealed BCM to Gyn organs as a simplicifolious clade with a unique mutational pattern. Compared to BC in breast, BCM to Gyn organs had higher rates of mutations of PIK3CA, AKT1, and BRAF; more mutations in DNA repair (0.79% vs 0.06%), transcription factor (4.72% vs 0.93%), and Wnt signaling pathways (2.36% vs 1.47%); but no increase in BRCA mutations. BCM to brain had the most p53 pathway and homologous recombination (HR) pathway mutations (64.71% and 14.01%), while Gyn had the least (19.69% and 7.09%). Quantiseq RNA deconvolution revealed differences in tumor immune cell infiltrate by BCM site. Gyn metastases vs breast tumors had increased B cells (6.20% vs 5.40%), M2 macrophages (5.71% vs 4.07%), and NK cells (3.82% vs 3.18%) (all P<0.01) and a M2/M1 macrophage ratio of 22.8:1 vs 1.3:1. Conclusions: BCM to Gyn organs have a unique mutational and immune suppression profile. Integrating the profiling with clinical outcomes may extend this prognostic signature and set the stage for improved treatment strategies for these patients. Confirmation from matched or sequential specimens could clarify tumor evolution. Our data support repeat biopsy of Gyn site metastases since more targetable mutations might be revealed. Targeting mechanisms of immunosuppression in Gyn BCM could expand therapeutic options. Table 1.Breast Cancer TumorsTumor SiteTotalPredominant Breast Cancer SubtypeAll12464HR+/HER2- (51.6%)Breast5014HR+/HER2- (46.5%)Liver2003HR+/HER2- (63.3%)Bone1132HR+/HER2- (69.4%)Axilla1051HR+/HER2- (47.7%)Lung823HR+/HER2- (46.1%)Lymph Node647HR+/HER2- (43.4%)Chest/Chest Wall375HR+/HER2- (44.8%)Brain359TNBC (38.2%)Other315HR+/HER2- (57.1%)Skin282HR+/HER2- (50.7%)Connective Tissue193HR+/HER2- (51.8%)GI Organs143HR+/HER2- (69.9%)Gynecologic Organs127HR+/HER2- (76.4%) Citation Format: Anna D Louie, Rani Chudasama, Sharon Wu, Marzia Capelletti, Daniel Magee, W. Michael Korn, Virginia Kaklamani, Antoinette R Tan, Pavani Chalasani, Wafik S El-Deiry, Don Dizon, Stephanie L. Graff. Mutational landscape and immune infiltration of breast cancer metastases to gynecologic and other organs [abstract]. In: Proceedings of the 2021 San Antonio Breast Cancer Symposium; 2021 Dec 7-10; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2022;82(4 Suppl):Abstract nr PD6-04.

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Sturgill, Emma G., Amanda Misch, Rebecca Lachs, Carissa C. Jones, Dan Schlauch, Suzanne F. Jones, Mythili Shastry et al. "Next-Generation Sequencing of Patients With Breast Cancer in Community Oncology Clinics". JCO Precision Oncology, n.º 5 (agosto de 2021): 1297–311. http://dx.doi.org/10.1200/po.20.00469.

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PURPOSE Molecular biomarkers informing disease diagnosis, prognosis, and treatment decisions in patients with breast cancer are being uncovered by next-generation sequencing (NGS) technologies. In this study, we survey how NGS is used for patients with breast cancer in real-world settings with a focus on physician behaviors and sequencing results. METHODS We conducted a retrospective analysis of patients with breast cancer who received NGS testing from commercial vendors as part of standard of care from 2014 to 2019. A total of 2,635 NGS reports from 2,316 unique breast cancer patients were assessed. Hormone receptor and human epidermal growth factor receptor 2 statuses were abstracted from patient medical records. Comparative gene amplification and mutation frequencies were analyzed using Pearson's correlation and Lin's concordance statistics. RESULTS The number of physicians ordering NGS tests for patients with breast cancer increased more than six-fold from 2014 to 2019. Tissue- and plasma-based tests were ordered roughly equally by 2019, with plasma-based testing ordered most frequently in hormone receptor–positive subtypes. Patients with triple-negative breast cancer were most likely to receive NGS testing. Gene amplifications including ERBB2 were detected less frequently in our real-world data set as compared to previous genomic landscape studies, whereas the opposite was true for gene mutations including ESR1. Pathogenic mutations in the PI3K pathway (38.6%) and DNA damage repair pathway (11.0%) were frequently reported. Alterations were also reported across other cellular pathways. CONCLUSION Overall, we found that an increasing number of physicians in community settings are adopting NGS in the care of patients with breast cancer. Discrepancies between our real-world NGS data and previous genomic landscape studies are likely owed to the prevalence of plasma-based testing in community oncology clinics, as the reference data were from tissue-based NGS alone.

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Krishnan, Preethi, Sunita Ghosh, Bo Wang, Mieke Heyns, Kathryn Graham, John R. Mackey, Olga Kovalchuk y Sambasivarao Damaraju. "Profiling of Small Nucleolar RNAs by Next Generation Sequencing: Potential New Players for Breast Cancer Prognosis". PLOS ONE 11, n.º 9 (15 de septiembre de 2016): e0162622. http://dx.doi.org/10.1371/journal.pone.0162622.

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Huang, Xin, Huanwen M. Wu, Changbin Zhu, Di Shao, Dan Guo, Yidong Zhou, Yan Lin et al. "Next generation sequencing reveals CCNE1 amplification as an independent prognostic factor for triple negative breast cancer (TNBC) patients." Journal of Clinical Oncology 38, n.º 15_suppl (20 de mayo de 2020): 558. http://dx.doi.org/10.1200/jco.2020.38.15_suppl.558.

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558 Background: Triple negative breast cancer (TNBC) has the worst prognosis among breast cancer due to the heterogeneity as well as lack of better therapeutic approach. It remains controversial whether BRCA status is the predictor of survival in TNBC. Besides, both germline and somatic mutation may contribute to the prognosis. This study is to explore the potential predictors and therapeutic targets based on genetic data and clinicopathological parameters. Methods: Seventy-five TNBC patients were enrolled with approximately 2:1 based on BRCA status. Genetic data was analysed by comprehensive genomic profiling 508 key cancer related genes. DAVID was applied to perform pathway enrichment analysis of significant enriched genetic alterations. Cox regression model was applied to evaluate disease-free survival (DFS) and overall survival (OS). Immuno-chemistry (IHC) was used to validate clinically meaningful genetic alteration. Results: In this study, 27 germline mutations were detected, including 26 homologous recombination repair (HRR) pathway gene mutations and 1 mismatch repair gene mutation among them 16 BRCA1 mutations and 5 BRCA2 mutations were found. Germline HRR including BRCA1/2 mutation marginally affected DFS ( p = 0.0624 and 0.15, respectively). We found 480 somatic genetic alterations including 110 copy number variations (CNV). The median value of TMB was determined to be 4.1 Muts/Mb which divided 74 TNBC patients into TMB-low (TMB-l) and TMB-high (TMB-h) group. TMB-l group had inferior DFS to TMB-h ( p = 0.0457). CCNE1 (with 5% frequency) copy number gain was specifically enriched in TMB-l group but mutually exclusive with BRCA1/2 mutation. TNBC with CCNE1 gain displayed worse DFS ( p< 0.0001). Cox multivariate regression analysis indicated CCNE1 gain was an independent risk factors for DFS [HR = 13.48 (95% CI 2.62-69.23), p= 0.002)]. Pathway analysis indicated CCNE1 harmed prognosis through regulation of transcription in G1/S phase. Expression of cyclin E1 was validated by IHC, which would be presented later. Conclusions: Comprehensive genomic profiling disclosed various potential prognostic markers for TNBC by integrating clinical characters. Especially, amplified CCNE1 may be a potential prognostic marker and therapeutic target. [Table: see text]

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Uji, Kumiko, Yasuto Naoi, Naofumi Kagara, Masafumi Shimoda, Atsushi Shimomura, Naomi Maruyama, Kenzo Shimazu, Seung Jin Kim y Shinzaburo Noguchi. "Significance of TP53 mutations determined by next-generation “deep” sequencing in prognosis of estrogen receptor-positive breast cancer". Cancer Letters 342, n.º 1 (enero de 2014): 19–26. http://dx.doi.org/10.1016/j.canlet.2013.08.028.

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Batista, Marta Vaz, Diogo Alpuim Costa, Paula Borralho y Sofia Braga. "Next-Generation Sequencing in Breast Cancer Management: A Case Report of Genomic Tumour Evolution over Time". Case Reports in Oncology 14, n.º 2 (16 de agosto de 2021): 1212–19. http://dx.doi.org/10.1159/000517441.

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The clinicopathological breast cancer subtypes are used in clinical practice to better anticipate biological behaviour and guide systemic treatment strategy. In the adjuvant setting, genomic assay recurrence scores became widely available for luminal-like disease. Recently, next-generation sequencing (NGS) platforms have been used, essentially, in more advanced disease setting, in situations refractory to conventional treatment, or even in rare cancers for which there are no established treatment guidelines. Moreover, subpopulations of cancer cells with unique genomes within the same patient may exist across different regions of a tumour or evolve over time, which is called intratumoural heterogeneity. We herein report a case of a 38-year-old woman with breast cancer whose primary and metastatic disease exhibited discordant expression of hormone receptors, with the former being positive and the latter negative. Furthermore, the NGS analysis revealed slight and dynamic changes of mutational profiles between different metastatic lesions, potentially impacting breast cancer management and prognosis. These alterations may reflect tissular and temporal changes in tumour subclones and may also be due to the selective pressure caused by antineoplastic treatment. The use of genomic analyses in order to improve cancer treatment has been studied prospectively with encouraging results. The widespread use of NGS tests in clinical practice also creates new challenges. The most relevant may be to know which genomic alterations detected should be valued and how they should be targeted.

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