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Peppi Breast Cancer

Tiia Honkanen, Emmi Wilenius, Peppi Koivunen, Jussi P Koivunen
We have previously shown that cancer stem-like cells (CSLCs) can mediate therapy resistance in ALK translocated lung cancers. HER2 has been linked to CSLCs in breast cancers and, therefore, we wanted to assess whether HER2 has a role in CSLCs in ALK translocated cancers. ALK translocated cell lines, H3122 and H2228, with variable sensitivity to ALK inhibition were used in the study. HER2 overexpression or knockdown was induced by retro- or lentiviral infections and cells were treated with pharmacological agents targeting HER2 and ALK signaling...
June 21, 2017: International Journal of Oncology
Kimberly J Briggs, Peppi Koivunen, Shugeng Cao, Keriann M Backus, Benjamin A Olenchock, Hetalben Patel, Qing Zhang, Sabina Signoretti, Gary J Gerfen, Andrea L Richardson, Agnieszka K Witkiewicz, Benjamin F Cravatt, Jon Clardy, William G Kaelin
The HIF transcription factor promotes adaptation to hypoxia and stimulates the growth of certain cancers, including triple-negative breast cancer (TNBC). The HIFα subunit is usually prolyl-hydroxylated by EglN family members under normoxic conditions, causing its rapid degradation. We confirmed that TNBC cells secrete glutamate, which we found is both necessary and sufficient for the paracrine induction of HIF1α in such cells under normoxic conditions. Glutamate inhibits the xCT glutamate-cystine antiporter, leading to intracellular cysteine depletion...
June 30, 2016: Cell
Dhirendra Kumar, Amit Kumar Yadav, Xinying Jia, Jason Mulvenna, Debasis Dash
Proteogenomic re-annotation and mRNA splicing information can lead to the discovery of various protein forms for eukaryotic model organisms like rat. However, detection of novel proteoforms using mass spectrometry proteomics data remains a formidable challenge. We developed EuGenoSuite, an open source multiple algorithmic proteomic search tool and utilized it in our in-house integrated transcriptomic-proteomic pipeline to facilitate automated proteogenomic analysis. Using four proteogenomic pipelines (integrated transcriptomic-proteomic, Peppy, Enosi, and ProteoAnnotator) on publicly available RNA-sequence and MS proteomics data, we discovered 363 novel peptides in rat brain microglia representing novel proteoforms for 249 gene loci in the rat genome...
January 2016: Molecular & Cellular Proteomics: MCP
Elina Jokinen, Niina Laurila, Peppi Koivunen, Jussi P Koivunen
Treatment resistance significantly inhibits the efficiency of targeted cancer therapies in drug-sensitive genotypes. In the current work, we studied mechanisms for rapidly occurring, adaptive resistance in targeted therapy-sensitive lung, breast, and melanoma cancer cell lines. The results show that in ALK translocated lung cancer lines H3122 and H2228, cells with cancer stem-like cell features characterized by high expression of cancer stem cell markers and/or in vivo tumorigenesis can mediate adaptive resistance to oncogene ablative therapy...
October 15, 2014: Oncotarget
Emmi Peurala, Peppi Koivunen, Kirsi-Maria Haapasaari, Risto Bloigu, Arja Jukkola-Vuorinen
INTRODUCTION: Loss of the retinoblastoma protein tumor suppressor gene (RB) coding for a nuclear phosphoprotein that regulates the cell cycle is found in many human cancers and probably leads to disruption of the p16-cyclin D1-CDK4/6-RB pathway. Cyclin D1 is known to activate CDK4, which then phosphorylates the RB protein, leading to cell cycle progression. p16 inhibits CDK4, keeping RB hypophosphorylated and preventing cell cycle progression. The significance of these three markers, cyclin D1, CDK4 and p16, for breast cancer and carcinogenesis is nevertheless still controversial...
2013: Breast Cancer Research: BCR
Yihang Liu, Jennifer L Malin, Allison L Diamant, Amardeep Thind, Rose C Maly
To assess the impact of patient-provider communication on adherence to tamoxifen (TAM) and aromatase inhibitors (AIs) 36 months after breast cancer (BC) diagnosis in a low-income population of women. California statewide surveys were conducted among 921 low-income women with BC at 6, 18, and 36 months after BC diagnosis. A subset of 303 women with stage I-III BC who initiated hormone treatment after diagnosis was identified. Bivariate and multivariate logistic regression analyses were performed, and adjusted adherence rates were calculated...
February 2013: Breast Cancer Research and Treatment
Emmi Peurala, Peppi Koivunen, Risto Bloigu, Kirsi-Maria Haapasaari, Arja Jukkola-Vuorinen
Tumor hypoxia-inducible transcription factor (HIF) overexpression often associates with a poor prognosis. Stability of the HIF-α subunits is regulated by HIF prolyl 4-hydroxylases, PHD1-3. We assessed here immunohistochemical expression of PHD1-3 and HIF-1α and 2α in patients with invasive ductal breast carcinoma (n = 102) and correlated their expression levels with main clinical prognostic factors and survival. PHD1 expression correlated with high proliferation, and these tumors were mainly estrogen receptor-negative...
May 2012: Breast Cancer Research and Treatment
Hoda Badr, Jean-Philippe Laurenceau, Leslie Schart, Karen Basen-Engquist, Dennis Turk
Women with metastatic breast cancer (MBC) experience high levels of emotional distress and pain. Although individuals often rely on their intimate partners to provide physical and emotional support when they are in pain, the daily impact of pain on the spousal relationship in the context of advanced cancer is unclear. To understand how relationships are affected by pain, 57 MBC patients and their partners completed electronic diary assessments 6 times a day for 14 days. Patients and partners rated the patient's pain, their own mood (circumplex adjectives), the provision/receipt of social support, and the degree to which cancer interfered with their relationship...
December 2010: Pain
Hoda Badr, Karen Basen-Engquist, Cindy L Carmack Taylor, Carl de Moor
This study used electronic diaries to examine patterns of mood and physical symptoms within and across days in two independent samples of cancer patients. Twenty-three breast cancer survivors (post-treatment) and 33 ovarian cancer survivors (on chemotherapy) recorded mood and physical symptoms 4 times daily for 7 consecutive days. A series of repeated-measures multilevel models using SAS Proc Mixed were calculated to estimate the degree to which physical symptoms (e.g., pain, fatigue, and nausea) were associated with participants' moods...
October 2006: Journal of Behavioral Medicine
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