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Randomized control trial to test a computerized psychosocial cancer assessment and referral program: Methods and research design
The National Cancer Coalition Network, National Cancer Institute, and American College of Surgeons all emphasize the need for oncology providers to identify, address, and monitor psychosocial needs of their patients. The Mental Health Assessment and Dynamic Referral for Oncology (MHADRO) is a patient-driven, computerized, psychosocial assessment that identifies, addresses, and monitors physical, psychological, and social issues faced by oncology patients.
This paper presents the methodology of a randomized controlled trial (RCT) that tested the impact of the MHADRO on patient outcomes at 2, 6, and 12 months. Patient outcomes including overall psychological distress, depression, anxiety, functional disability, and use of psychosocial resources will be presented in future publications after all follow-up data is gathered. Eight hundred and thirty six cancer patients with heterogeneous diagnoses, across three comprehensive cancer centers in different parts of the United States, were randomized to the MHADRO (intervention) or an assessment-only control group. Patients in the intervention group were provided detailed, personalized reports and, when needed, referrals to mental health services; their oncology provider received detailed reports designed to foster clinical decision making. Those patients who demonstrated high levels of psychosocial problems were given the option to authorize that a copy of their report be sent electronically to a "best match" mental health professional. Demographic and patient cancer-related data as well as comparisons between patients who were enrolled and those who declined enrollment are presented. Challenges encountered during the RCT and strategies used to address them are discussed.
Screening for Suicidal Ideation and Attempts Among Emergency Department Medical Patients: Instrument and Results from the Psychiatric Emergency Research Collaboration
Joint Commission National Patient Safety Goal 15 calls for organizations "to identify patients at risk for suicide." Overt suicidal behavior accounts for 0.6% of emergency department (ED) visits, but incidental suicidal ideation is found in 3%-11.6%. This is the first multicenter study of suicide screening in EDs. Of 2,243 patients in six diverse emergency settings, 1,068 (47.7%) were screened with a brief instrument. Depression was endorsed by 369 (34.5%); passive suicidal ideation by 79 (7.3%); and active suicidal ideation by 24 (2.3%). One hundred thirty-seven (12.8%) reported prior attempts, including 35 (3.3%) with current suicidal ideation. Almost half of those with current ideation had a prior attempt (43.8%) versus those without current ideation, 10.3%, chi(2) (1) = 75.59, p < .001. Twenty cases (25%) were admitted to medical services, but only 10 (12.5%) received mental health assessment; none were admitted directly to a psychiatry service. The prevalence of suicidal ideation here is similar to previous studies but the frequency of prior attempts has not been reported. The 35 cases with current ideation and prior attempt are at risk. As they did not present psychiatrically, they would likely have gone undetected. Despite reporting these cases to clinical staff, few received risk assessment.
Knowledge, Attitudes, and Practices of Emergency Department Providers in the Care of Suicidal Patients
BACKGROUND: We sought to examine the knowledge, attitudes, and practices of emergency department (ED) providers concerning suicidal patient care and to identify characteristics associated with screening for suicidal ideation (SI).
METHODS: Six hundred thirty-one providers at eight EDs completed a voluntary, anonymous survey (79% response rate).
RESULTS: The median participant age was 35 (interquartile range: 30-44) years and 57% of the participants were females. Half (48%) were nurses and half were attending (22%) or resident (30%) physicians. More expressed confidence in SI screening skills (81-91%) than in skills to assess risk severity (64-70%), counsel patients (46-56%), or create safety plans (23-40%), with some differences between providers. Few thought mental health provider staffing was almost always sufficient (6-20%) or that suicidal patient treatment was almost always a top ED priority (15-21%). More nurses (37%, 95% confidence interval [CI] 31-42%) than physicians (7%, 95% CI 4-10%) reported screening most or all patients for SI; this difference persisted after multivariable adjustment. In multivariable analysis, other factors associated with screening most or all patients for SI were self-confidence in skills, (odds ratio [OR] 1.60, 95% CI 1.17-2.18), feeling that suicidal patient care was a top ED priority (OR 1.73, 95% CI 1.11-2.69) and 5+ postgraduate years of clinical experience (OR 2.06, 95% CI 1.03-4.13).
CONCLUSIONS: ED providers reported confidence in suicide screening skills but gaps in further assessment, counseling, or referral skills. Efforts to promote better identification of suicidal patients should be accompanied by a commensurate effort to improve risk assessment and management skills, along with improved access to mental health specialists.
Lethal Means Restriction for Suicide Prevention: Beliefs and Behaviors of Emergency Department Providers
BACKGROUND: We sought to examine the beliefs and behaviors of emergency department (ED) providers related to preventing suicide by reducing suicidal patients' access to lethal methods (means restriction) and identify characteristics associated with asking patients about firearm access.
METHODS: Physicians and nurses at eight EDs completed a confidential, voluntary survey.
RESULTS: The response rate was 79% (n = 631); 57% of respondents were females and 49% were nurses. Less than half believed, "most" or "all" suicides are preventable. More nurses (67%) than physicians (44%) thought "most" or "all" firearm suicide decedents would have died by another method had a firearm been unavailable (P < .001). The proportion of providers who reported they "almost always" ask suicidal patients about firearm access varied across five patient scenarios: suicidal with firearm suicide plan (64%), suicidal with no suicide plan (22%), suicidal with nonfirearm plan (21%), suicidal in past month but not today (16%), and overdosed but no longer suicidal (9%). In multivariable logistic regression, physicians were more likely than nurses to "almost always" or "often" ask about a firearm across all five scenarios, as were older providers and those who believed their own provider type was responsible for assessing firearm access.
CONCLUSIONS: Many ED providers are skeptical about the preventability of suicide and the effectiveness of means restriction, and most do not assess suicidal patients' firearm access except when a patient has a firearm suicide plan. These findings suggest the need for targeted staff education concerning means restriction for suicide prevention.
A randomized clinical trial of the Health Evaluation and Referral Assistant (HERA): Research methods
The Health Evaluation and Referral Assistant (HERA) is a web-based program designed to facilitate screening, brief intervention, and referral to treatment (SBIRT) for tobacco, alcohol, and drug abuse. After the patient completes a computerized substance abuse assessment, the HERA produces a summary report with evidence-based recommended clinical actions for the healthcare provider (the Healthcare Provider Report) and a report for the patient (the Patient Feedback Report) that provides education regarding the consequences of use, personally tailored motivational messages, and a tailored substance abuse treatment referral list. For those who provide authorization, the HERA faxes the individual's contact information to a substance abuse treatment provider matched to the individual's substance use severity and personal characteristics, like insurance and location of residence (dynamic referral). This paper summarizes the methods used for a randomized controlled trial to evaluate the HERA's efficacy in leading to increased treatment initiation and reduced substance use. The study was performed in four emergency departments. Individual patients were randomized into one of two conditions: the HERA or assessment only. A total of 4269 patients were screened and 1006 participants enrolled. The sample was comprised of 427 tobacco users, 212 risky alcohol users, and 367 illicit drug users. Forty-two percent used more than one substance class. The enrolled sample was similar to the eligible patient population. The study should enhance understanding of whether computer-facilitated SBIRT can impact process of care variables, such as promoting substance abuse treatment initiation, as well as its effect on subsequent substance abuse and related outcomes.
Deep annotation of Drosophila melanogaster microRNAs yields insights into their processing, modification, and emergence
Since the initial annotation of miRNAs from cloned short RNAs by the Ambros, Tuschl, and Bartel groups in 2001, more than a hundred studies have sought to identify additional miRNAs in various species. We report here a meta-analysis of short RNA data from Drosophila melanogaster, aggregating published libraries with 76 data sets that we generated for the modENCODE project. In total, we began with more than 1 billion raw reads from 187 libraries comprising diverse developmental stages, specific tissue- and cell-types, mutant conditions, and/or Argonaute immunoprecipitations. We elucidated several features of known miRNA loci, including multiple phased byproducts of cropping and dicing, abundant alternative 5' termini of certain miRNAs, frequent 3' untemplated additions, and potential editing events. We also identified 49 novel genomic locations of miRNA production, and 61 additional candidate loci with limited evidence for miRNA biogenesis. Although these loci broaden the Drosophila miRNA catalog, this work supports the notion that a restricted set of cellular transcripts is competent to be specifically processed by the Drosha/Dicer-1 pathway. Unexpectedly, we detected miRNA production from coding and untranslated regions of mRNAs and found the phenomenon of miRNA production from the antisense strand of known loci to be common. Altogether, this study lays a comprehensive foundation for the study of miRNA diversity and evolution in a complex animal model.
Target RNA-directed tailing and trimming purifies the sorting of endo-siRNAs between the two Drosophila Argonaute proteins
In flies, 22-23-nucleotide (nt) microRNA duplexes typically contain mismatches and begin with uridine, so they bind Argonaute1 (Ago1), whereas 21-nt siRNA duplexes are perfectly paired and begin with cytidine, promoting their loading into Ago2. A subset of Drosophila endogenous siRNAs-the hairpin-derived hp-esiRNAs-are born as mismatched duplexes that often begin with uridine. These would be predicted to load into Ago1, yet accumulate at steady-state bound to Ago2. In vitro, such hp-esiRNA duplexes assemble into Ago1. In vivo, they encounter complementary target mRNAs that trigger their tailing and trimming, causing Ago1-loaded hp-esiRNAs to be degraded. In contrast, Ago2-associated hp-esiRNAs are 2'-O-methyl modified at their 3' ends, protecting them from tailing and trimming. Consequently, the steady-state distribution of esiRNAs reflects not only their initial sorting between Ago1 and Ago2 according to their duplex structure, length, and first nucleotide, but also the targeted destruction of the single-stranded small RNAs after their loading into an Argonaute protein.
Promise For The Future: How Federal Programs Can Improve Career Outcomes For Youth & Young Adults With Serious Mental Health Conditions
This report focuses on a critical area of mental health policy – how to assist youth and young adults with serious mental health conditions with improved prospects for successful independent living and economic security through education, job training and community services and supports. It identifies and discusses the array of federal programs that can be deployed to help these individuals through the transition into adulthood; includes recommendations on how state and local policymakers can make the best use of these programs; and suggests changes that should be made to make them more accessible and more effective.
Understanding Factors that Influence Pregnant and Parenting Teenagers to Seek Medical Care for Themselves and Their Children in the Emergency Room versus with their Primary Care Providers
Background: Overuse of emergency rooms (ER) is an important topic in light of increasing health care costs and decreasing numbers of primary care providers (PCPs). Frequent ER visits were noted to be an issue by the directors of the Teen Living Program (TLP), a non-profit residential shelter for pregnant and parenting teenagers in Worcester, MA. However, there have been very few studies that examine the factors that influence patients to visit the emergency room, and none of the studies identified were focused on adolescents or adolescent parents.
Objectives: This study aims to address this gap in literature related to use of the ER by adolescent females who are pregnant or already parenting a child. Specifically, this study was designed to explore the social, emotional, and economic factors that influence how teens at TLP utilize the medical system in order to ultimately help them strengthen relationships with healthcare providers and assist the healthcare system with better serving them.
Methods: This was a qualitative study utilizing focus groups and a demographic questionnaire as our data collection methods. Two focus groups were conducted using a semi-structured interview guide and were held during group sessions at TLP. There were 10 participants aged 17 to 21 years, each of whom were mothers with one child; none were pregnant at the time. The focus groups were audio-recorded and lasted 1.5 hours, with an additional 15 minutes at the conclusion for the questionnaire. Digital recordings of the groups were transcribed verbatim. For analysis, textual data was categorized into major themes and subthemes, and representative quotes were selected.
Results: The participants’ choice of medical care was predominantly related to previous personal negative experiences and positive relationships. Negative experiences included fear of bad news, dislike of back-up doctors as opposed to their regular PCP, and providers who don’t spend enough time with patients or respect their concerns. Positive experiences were centered around trust, specifically knowing the patient by name, remembering personal details and spending time with them. Experiences and stories from family and friends also played a role in trust and decision-making. Financial considerations were related mainly to transportation options, as opposed to the cost of the care, tests or prescriptions, because of comprehensive insurance coverage.
Conclusion: The choice of where to seek medical care can be confusing for adolescents, particularly young mothers who are in the “twilight zone” between adolescence and adulthood. Attention needs to be directed toward developing tools to explain the process of contacting a PCP and going to the ER, as well as improving trust between patients and PCPs.
Evaluation of intravenous voriconazole in patients with compromised renal function
BACKGROUND: Incorporation of the solubilizing excipient, sulfobutylether-β-cyclodextrin (SBECD), in the intravenous (IV) formulation of voriconazole has resulted in the recommendation that this formulation be used with caution in patients with creatinine clearances (Clcr) < 50 mL/min. This study evaluated the safety of IV voriconazole compared with two other IV antifungals not containing SBECD in patients with compromised renal function.
METHODS: A total of 128 patients aged 11-93 years who had a baseline Clcr < 50 mL/min between January 1, 2007 and December 31, 2010 were identified from a database of a university-affiliated inpatient healthcare system; of these, 55 patients received caspofungin, 54 patients received fluconazole, and 19 patients received voriconazole. Changes in serum creatinine (Scr) and Clcr levels while on therapy were compared with baseline values and between groups.
RESULTS: The groups had similar characteristics apart from the larger proportion of females that received fluconazole. Baseline Scr was higher in those receiving caspofungin, but maximal increases of Scr and decreases in Clcr were greatest for the fluconazole group. Acute kidney injury (AKI), assessed by RIFLE criteria, was more frequent in the fluconazole vs. the caspofungin group (p < 0.01); incidence of AKI in the voriconazole group was not significantly different than found in the other two groups. The infecting organism was a predictor of AKI and formulation with SBECD was not.
CONCLUSIONS: Treatment of fungal infections in patients with compromised renal function with an SBECD-containing antifungal agent was not associated with AKI in clinical practice. Since the infecting organism was associated with AKI, decision on which antifungal to use should be determined by susceptibilities to the organism and not the incorporation of SBECD in the IV formulation.
Common genetic variants in peroxisome proliferator-activated receptor-gamma (PPARG) and type 2 diabetes risk among Women's Health Initiative postmenopausal women
CONTEXT: Peroxisome proliferator-activated receptor-gamma (PPARG) plays a pivotal role in adipogenesis and glucose homeostasis.
OBJECTIVE: We investigated whether PPARG gene variants were associated with type 2 diabetes (T2D) risk in the multiethnic Women's Health Initiative (WHI).
RESEARCH DESIGN AND METHODS: We assessed PPARG single-nucleotide polymorphisms (SNPs) in a case-control study nested in the prospective WHI observational study (WHI-OS) (1543 T2D cases and 2170 matched controls). After identifying 24 tagSNPs, we used multivariable logistic regression models and haplotype-based analyses to estimate these tagSNP-T2D associations. Single-SNP analyses were also conducted in another study of 5642 African American and Hispanic American women in the WHI SNP Health Association Resource (WHI-SHARe).
RESULTS: We found a borderline significant association between the Pro12Ala (rs1801282) variant and T2D risk in WHI-OS [odds ratio (OR) 0.51, 95% confidence interval (CI) 0.31-0.83, P = .01, combined group, additive model; P = .04, Hispanic American] and WHI-SHARe (OR 0.25, 95% CI 0.08-0.77, P = .02, Hispanic American) participants. In promoter region, rs6809631, rs9817428, rs10510411, rs12629293, and rs12636454 were also associated with T2D risk (range ORs 0.68-0.78, 95% CIs 0.52-0.91 to 0.60-1.00, P
CONCLUSIONS: The association between PPARG Pro12Ala SNP and increased T2D susceptibility was confirmed, with Pro12 as risk allele. Additional significant loci included 5 PPARG promoter variants.
Factors associated with blood pressure control in hypertensive patients with coronary heart disease: evidence from the chinese cholesterol education program
Blood pressure (BP) remains poorly controlled among hypertensive patients with coronary heart disease (CHD) in China. Improvement of its management will require an understanding of the patient characteristics and treatment factors associated with uncontrolled hypertension. A cross-sectional survey of 3,279 patients from 52 centers in China was performed to examine potential barriers to adequate blood pressure control of hypertensive patients with CHD. Uncontrolled hypertension was defined as blood pressure >/=130/or 80 mmHg. Multivariable logistic regression was used to identify factors associated with poor blood pressure control. Mean age of the patients was 65 years, 40% were women, and mean BMI was 25 kg/m(2). Mean systolic blood pressure was 136+/-18 mmHg and mean diastolic blood pressure was 80+/-11 mmHg. Only 18% of patients had a mean blood pressure <130/80 mmHg during the study period. Multivariate analysis revealed several independent factors of poor blood pressure control: body mass index >/=23 kg/m(2), the presence of stable angina pectoris (SAP), family history of diabetes, and use of calcium channel blockers (CCB). Further analysis showed that non-dihydropyridine calcium antagonist was significantly correlated with low BP control rate. Some of these may be amenable to modification. The results of our study suggest that overweight, the presence of SAP and family history of diabetes are important factors for tight BP control in primary care. In addition, non-dihydropyridine calcium channel blockers appear less effective than other therapies in control of blood pressure and should not be the first choice among hypertensive patients with CHD. Further identification of patients at risk of poor BP control can lead to targeted interventions to improve management.
Racial/ethnic disparities in association between dietary quality and incident diabetes in postmenopausal women in the United States: the Women's Health Initiative 1993-2005
Objective. To examine the association of dietary quality and risk of incident diabetes overall and by race/ethnicity among postmenopausal women enrolled in the Women's Health Initiative (WHI).
Research methods and procedures. The WHI recruited 161,808 postmenopausal women between 1993 and 1998, and followed them until 2005. Incident diabetes was determined annually over an average of 7.6 years from enrollment. At baseline, all participants completed a Food Frequency Questionnaire (FFQ). Dietary quality was assessed by the Alternate Healthy Eating Index (AHEI), calculated from the baseline FFQ responses.
Results. There were 10,307 incident cases of self-reported treated diabetes over 1,172,761 person-years of follow-up. Most participants did not meet the AHEI dietary goals; that is, only 0.1% of women met or exceeded the recommended consumption of vegetables, and few (17.3%) met or exceeded the recommended level for total fiber. After adjusting for potential confounders, women in the highest quintile of the AHEI score were 24% less likely to develop diabetes relative to women in the lowest quintile of AHEI [hazard ratio (HR) = 0.76 (95% CI: 0.70-0.82)]. This association was observed in Whites [HR = 0.74 (95% CI: 0.68-0.82)] and Hispanics [HR = 0.68 (95% CI: 0.46-0.99)], but not in Blacks [HR = 0.85 (95% CI: 0.69-1.05)] or Asians [HR = 0.88 (95% CI: 0.57-1.38)].
Conclusion. These findings support a protective role of healthful eating choices in reducing the risk of developing diabetes, after adjusting for other lifestyle factors, in White and Hispanic postmenopausal women. Future studies are needed to investigate the relationship between dietary quality and risk of diabetes among Blacks and Asians in relationship to other lifestyle factors.
Relations of Depressive Symptoms and Antidepressant Use to Body Mass Index and Selected Biomarkers for Diabetes and Cardiovascular Disease
Objectives. We investigated whether depressive symptoms and antidepressant use are associated with biomarkers for glucose dysregulation and inflammation, body mass index (BMI), and waist circumference.
Methods. Postmenopausal women were recruited into the Women's Health Initiative from 1993 to 1998, and data were collected at regular intervals through 2005. We used multiple linear regression models to examine whether depressive symptoms and antidepressant use are associated with BMI, waist circumference, and biomarkers.
Results. Analysis of data from 71 809 women who completed all relevant baseline and year 3 assessments showed that both elevated depressive symptoms and antidepressant use were significantly associated with higher BMI and waist circumference. Among 1950 women, elevated depressive symptoms were significantly associated with increased insulin levels and measures of insulin resistance. Analyses of baseline data from 2242 women showed that both elevated depressive symptoms and antidepressant use were associated with higher C-reactive protein levels.
Conclusions. Monitoring body habitus and other biomarkers among women with elevated depression symptoms or taking antidepressant medication may be prudent to prevent diabetes and cardiovascular disease. (Am J Public Health. Published online ahead of print June 13, 2013: e1-e10. doi:10.2105/AJPH.2013.301394).
Samuel Thompson Papers, 1974 – 1982: A Finding Aid
The Samuel Thompson Papers chronicle the career of Samuel Thompson, Ph.D., Associate Vice Chancellor for Community Relations, Planning and Development and Associate Dean for Administration and Finance at the University of Massachusetts Medical School.
Intermediaries Promote the Use of Research Evidence in Children's Behavioral Health Systems Change
In this Issue Brief, we provide background on the use of research to inform policy and practice, describe the use of evidence in the context of Massachusetts-wide systems change in children’s behavioral health services, and discuss the key role of intermediaries in facilitating knowledge exchange.
Local Macrophage Proliferation in Adipose Tissue Is a Characteristic of Obesity-Associated Inflammation: A Dissertation
Obesity and diabetes are major public health problems facing the world today. Extending our understanding of adipose tissue biology, and how it changes in obesity, will hopefully better equip our society in dealing with the obesity epidemic. Macrophages and other immune cells accumulate in the adipose tissue in obesity and secrete cytokines that can promote insulin resistance. Adipose tissue macrophages (ATMs) are thought to originate from bone marrow-derived monocytes, which infiltrate the tissue from the circulation. Much work has been done to demonstrate that inhibition of monocyte recruitment to the adipose tissue can ameliorate insulin resistance. While monocytes can enter the adipose tissue, we have shown here that local macrophage proliferation may be the predominant mechanism by which macrophages self-renew in the adipose tissue.
We demonstrated that two cell proliferation markers, Ki67 and EdU, can be readily detected in macrophages isolated from adipose tissue of both lean and obese mice. These analyses revealed that 2-4% of ATMs in lean and 10-20% of ATMs in obese mice express the proliferation marker Ki67. Importantly, Ki67+ macrophages were identified within the adipose tissue in crown-like structures. Similarly, a 3-hour in vivo pulse with the thymidine analog EdU showed that nearly 5% of macrophages in epididymal adipose tissue of ob/ob mice were in the S-phase of cell division. Interestingly, obesity increased the rate of macrophage proliferation in adipose tissue but did not affect macrophage proliferation in other tissues. We also used clodronate liposomes to deplete circulating monocytes in obese mice. Surprisingly, monocyte depletion for a total of at least 80 hours did not cause a decrease in ATM content in adipose tissue. Prolonged exposure of mice to EdU in drinking water revealed that approximately half of the ATMs in the epididymal fat pads of ob/ob mice had proliferated locally within 80 hours. Amazingly, these rates were the same with or without monocyte depletion, meaning that the proliferating cells were not freshly recruited monocytes.
Overall, these results suggest that local proliferation unexpectedly makes a major contribution to maintaining the large population of macrophages present in the obese adipose tissue in the steady state. This suggests that increased rates of local macrophage proliferation may also be partly responsible for the massive increase in ATM content that occurs in obesity. This information could have implications for future therapeutic strategies in the management of diabetes.
Regulation of Higher Order Chromatin at GRIN2B and GAD1 Genetic Loci in Human and Mouse Brain: A Dissertation
Little is known about higher order chromatin structures in the human brain and their function in transcription regulation. We employed chromosome conformation capture (3C) to analyze chromatin architecture within 700 Kb surrounding the transcription start site (TSS) of the NMDA receptor and schizophrenia susceptibility gene, GRIN2B, in human and mouse cerebral cortex. Remarkably, both species showed a higher interaction between the TSS and an intronic sequence, enriched for (KRAB) Krueppel associated Box domain binding sites and selectively targeted by the (H3K9) histone 3 lysine 9 specific methyltransferase ESET/SETDB1. Transgenic mice brain cortical nuclei over-expressing Setdb1 showed increased heterochromatin-protein 1 signal at the interacting regions coupled with decreased Grin2b expression. 3C further revealed three long distant chromatin loop interactions enriched with functional enhancer specific (H3K27Ac) histone 3 lysine 27 acetylation signal in GRIN2B expressing tissue (human cortical nuclei and Human Embryonic Kidney - HEK cells). Doxycycline-induced SETDB1 over-expression decreased 2 out of 3 loop interaction frequencies suggesting a possible SETDB1-mediated transcription repression. We also report a specific looping interaction between a region 50Kb upstream of the (GAD1) Glutamic Acid Decarboxylase – 1 gene TSS and the GAD1 TSS in human brain nuclei. GAD1 catalyzes the rate limiting step in (GABA) gamma amino-butyric acid synthesis and is quintessential for inhibitory signaling in the human brain. Clinical studies in schizophrenia brain samples reveal a decreased looping interaction frequency in correspondence with a decrease in gene expression. Our findings provide evidence for the existence of transcription relevant higher order chromatin structures in human brain.
Nuclear Organization in Breast Cancer: A Dissertation
The nuclear matrix (NM) is a fibrogranular network of ribonucleoproteins upon which transcriptional complexes and regulatory genomic sequences are organized. A hallmark of cancer is the disorganization of nuclear architecture; however, the extent to which the NM is involved in malignancy is not well studied.
The RUNX1 and RUNX2 proteins form complexes within the NM to promote hematopoiesis and osteoblastogenesis, respectively at the transcriptional level. RUNX1 and RUNX2 are both expressed in breast cancer cells (BrCCs); however, their genome-wide BrCC functions are unknown. RUNX1 and RUNX2 activate many tumor suppressor pathways in blood and bone lineages, respectively, including attenuation of protein synthesis and cell growth via suppression of ribosomal RNA (rRNA) transcription, which appears contrary to Runx-expression in highly proliferative BrCCs. To define roles for RUNX1 and RUNX2 in BrCC phenotype, we examined the involvement of RUNX1 and RUNX2 in rRNA transcription and generated a genome-wide model for RUNX1 and RUNX2-binding and transcriptional regulation. To validate gene expression patterns identified in our screen, we developed a Real-Time qPCR primer design program, which allows rapid, high-throughput design of primer pairs (FoxPrimer). In BrCCs, RUNX1 and RUNX2 regulate genes that promote invasiveness and do not affect rRNA transcription, protein synthesis, or cell growth. We have characterized in vitro functions of Runx proteins in BrCCs; however, the relationships between Runx expression and diagnostic/prognostic markers of breast cancer (BrCa) in patients are not well studied. Immunohistochemical detection of RUNX1 and RUNX2 in BrCa tissue microarrays reveals RUNX1 expression is associated with early, smaller tumors that are ER+ (estrogen receptor), HER2+, p53-, and correlated with androgen receptor (AR) expression; RUNX2 expression is associated with late-stage, larger tumors that are HER2+. These results show that the functions and expression patterns of NM-associated RUNX1 and RUNX2 are context-sensitive, which suggests potential disease-specific roles.
Two functionally disparate genomic sequence types bind to the NM: matrix associated regions (MARs) are functionally associated with transcriptional repression and scaffold associated regions (SARs) are functionally associated with actively expressed genes. It is unknown whether malignant nuclear disorganization affects the functions of MARs/SARs in BrCC. We have refined a method to isolate nuclear matrix associated DNA (NM-DNA) from a structurally preserved NM and applied this protocol to normal mammary epithelial cells and BrCCs. To define transcriptional functions for NM-DNA, we developed a computational algorithm (PeaksToGenes), which statistically tests the associations of experimentally-defined NM-DNA regions and ChIP-seq-defined positional enrichment of several histone marks with transcriptome-wide gene expression data. In normal mammary epithelial cells, NM-DNA is enriched in both MARs and SARs, and the positional enrichment patterns of MARs and SARs are strongly associated with gene expression patterns, suggesting functional roles. In contrast, the BrCCs are significantly enriched in the silencing mark H3K27me3, and the NM-DNA is enriched in MARs and depleted of SARs. The MARs/SARs in the BrCCs are only weakly associated with gene expression patterns, suggesting that loss of normal DNA-matrix associations accompanies the disease state. Our results show that structural preservation of the in situ NM allows isolation of both MARs and SARs, and further demonstrate that in a disorganized, cancerous nucleus, normal transcriptional functions of NM-DNA are disrupted.
Our studies on nuclear organization in BrCC, show that the disorganized phenotype of the cancer cell nucleus is accompanied by deregulated transcriptional functions of two constituents of the NM. These results reinforce the role of the NM as an important structure-function component of gene expression regulation.
Opportunities and Barriers for Librarians in Exploring Data: Observations from the Data Curation Profile Workshops
Setting and Objective: The Purdue University Libraries offered a series of professional development workshops in 2011-2012 to provide librarians with a broad understanding of issues in data curation and to train them in the use of the Data Curation Profiles Toolkit (DCP Toolkit). An additional goal of the workshop was to develop a better understanding of the experiences, attitudes, and needs of librarians as they explore new roles.
Design and Methods: Workshop participants were asked to complete three surveys: one before the workshop, one right afterwards, and one delivered three months after they had attended the workshop. Participants’ responses to the survey questions that pertained to demographic information, confidence levels, and levels of engagement before and after the workshop were reviewed and analyzed.
Results: The results of the survey indicated that participants’ confidence levels in multiple areas increased after the workshop, but that their levels of engagement remained relatively stagnant. An analysis of the free text comments made in the survey revealed multiple issues in librarians’ efforts to increase their engagement in working with data including time, staffing, and organizational support from their library.
Conclusions: The challenges encountered by librarians seeking to engage in data management and curation issues are found at the individual level (acquiring skills and confidence) and at the organizational level (creating a supportive environment). Both levels will need to be addressed by libraries seeking to develop data services.
