Publications by authors named "Nicole Jenkins"

Importance: The Accreditation Council for Graduate Medical Education (ACGME) has aimed to increase diversity among the physician workforce. Prospective applicants utilize websites to identify programs that share a commitment to equity and inclusion. Published statements of Diversity, Equity, and Inclusion (DEI) demonstrate a fellowship program's recognition of the importance of improving diversity in health care and medical education.

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Article Synopsis
  • Triple-negative breast cancer (TNBC) is a highly aggressive subtype with varied characteristics, limited treatment choices, and poor clinical outcomes, particularly when associated with homologous recombination deficiency (HRD).
  • The study analyzed TNBC tumors from two groups (n=32 and n=58), revealing significant differences in genome-wide copy number and methylation alterations linked to HRD, including lower methylation in specific genomic regions.
  • Findings indicate that HRD in TNBC is associated with key biological pathways, and using machine learning can aid in classifying tumors based on HRD and methylation patterns, offering potential for improved treatment strategies.
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Importance: Adherence to overactive bladder (OAB) therapy is low among the general population. Prior studies suggest that OAB is more prevalent among Hispanic women compared with other ethnicities.

Objectives: The aims of this study were to analyze nonadherence to OAB therapy among Hispanic compared with non-Hispanic women and identify potential barriers to treatment to reduce disparities in care.

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Introduction & Importance: Endometrial cancer with high-risk histology is associated with a majority of recurrences and death. However, unlike other cancers, such as ovarian, there is a paucity of research demonstrating the benefits of secondary cytoreduction. In this case report we aim to aid in identifying individuals who may be ideal candidates for secondary cytoreduction surgery after minimally invasive hysterectomy and staging by a gynecologic oncologist at an academic institution and diagnosed with clear cell endometrial cancer.

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Ssn3, also known as Cdk8, is a member of the four protein Cdk8 submodule within the multi-subunit Mediator complex involved in the co-regulation of transcription. In Candida albicans, the loss of Ssn3 kinase activity affects multiple phenotypes including cellular morphology, metabolism, nutrient acquisition, immune cell interactions, and drug resistance. In these studies, we generated a strain in which Ssn3 was replaced with a functional variant of Ssn3 that can be rapidly and selectively inhibited by the ATP analog 3-MB-PP1.

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Diamond nitrogen-vacancy (NV) centers constitute a promising class of quantum nanosensors owing to the unique magneto-optic properties associated with their spin states. The large surface area and photostability of diamond nanoparticles, together with their relatively low synthesis costs, make them a suitable platform for the detection of biologically relevant quantities such as paramagnetic ions and molecules in solution. Nevertheless, their sensing performance in solution is often hampered by poor signal-to-noise ratios and long acquisition times due to distribution inhomogeneities throughout the analyte sample.

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All eukaryotes require iron. Replication, detoxification, and a cancer-protective form of regulated cell death termed , all depend on iron metabolism. Ferrous iron accumulates over adult lifetime in .

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The DNA-dependent protein kinase catalytic subunit (DNA-PKcs) has well-established roles in DNA double-strand break repair, and recently, nonrepair functions have also been reported. To better understand its cellular functions, we deleted DNA-PKcs from HeLa and A549 cells using CRISPR/Cas9. The resulting cells were radiation sensitive, had reduced expression of ataxia-telangiectasia mutated (ATM), and exhibited multiple mitotic defects.

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Article Synopsis
  • Dynamic protein phosphorylation is a key regulatory mechanism in organisms, and PP4 is a vital phosphatase whose substrate selection principles are not well understood.
  • The study identifies the FxxP motif as a consensus-binding motif for PP4, demonstrated through X-ray crystallography, revealing its binding to the PP4 regulatory subunit PPP4R3.
  • This research also highlights the FxxP motif's presence in various proteins, including WAPL, which is crucial for regulating phosphorylation and cohesin release in cellular processes.
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Rosen et al. thoughtfully extend the ethical discussion surrounding disease-modifying therapies in late-stage Alzheimer's disease (AD) to correctly emphasize that the perceived quality of life (QoL) of the individual living with the disease is a critical component to decisions regarding their clinical care. The primary purpose of our original article regarding the use of disease-modifying therapeutics in late-stage AD was to ensure that those affected by AD and their primary care team are empowered to make informed care decisions in the best interest of the individual living with AD.

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There is hope that the continuing efforts of researchers will yield a disease-modifying drug for Alzheimer's disease. Such a drug is likely to be capable of halting, or significantly slowing, the underlying pathological processes driving cognitive decline; however, it is unlikely to be capable of restoring brain function already lost through the pathological process. A therapy capable of halting Alzheimer's disease, while not providing restoration of function, may prompt serious ethical questions.

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  • - A complex interaction exists between kinases and phosphatases, where over 400 kinases are responsible for phosphorylating proteins, but only seven phosphatases (PPPs) mainly handle their dephosphorylation, leading to an initially perceived imbalance in their functions.
  • - Contrary to earlier assumptions that PPPs were non-specific, it is now understood that they achieve specificity through unique associations with noncatalytic subunits, creating numerous distinct signaling complexes.
  • - A novel chemical proteomic strategy was developed to study the PPPs and their interacting proteins, using inhibitors and advanced mass spectrometry to map out specific PPP expression in various human cancer cell lines and tissues, revealing new protein interactions.
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Huntington's disease is caused by the pathological expansion of a polyglutamine (polyQ) stretch in Huntingtin (Htt), but the molecular mechanisms by which polyQ expansion in Htt causes toxicity in selective neuronal populations remain poorly understood. Interestingly, heterologous expression of expanded polyQ Htt is toxic in Saccharomyces cerevisiae cells, but has no effect in Schizosaccharomyces pombe, a related yeast species possessing very few endogenous polyQ or Q/N-rich proteins. Here, we used a comprehensive and unbiased mass spectrometric approach to identify proteins that bind Htt in a length-dependent manner in both species.

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A 30-year-old male roughneck worker on an oil rig underwent aortic valve replacement and subsequently enrolled in the Baylor Heart and Vascular Hospital exercise-based cardiac rehabilitation (CR) program. He expressed a strong desire to return to his physically demanding job. Based on his unique job requirements, CR staff designed and implemented comprehensive tests and a 5-week specific physical training program that included 6 exercises simulating his job functions.

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Drug resistance to approved systemic therapies in estrogen receptor-positive (ER+) breast cancer remains common. We hypothesized that factors present in the human tumor microenvironment (TME) drive drug resistance. Screening of a library of recombinant secreted microenvironmental proteins revealed fibroblast growth factor 2 (FGF2) as a potent mediator of resistance to anti-estrogens, mTORC1 inhibition, and phosphatidylinositol 3-kinase inhibition in ER+ breast cancer.

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Introduction: Invasive fungal infections are an increasing cause of mortality and morbidity in high risk patient populations such as those on immunosuppressive therapy. Triazole antifungals are recommended for the prevention and treatment of such infections. The aim of this study was to develop and validate a simple, sensitive and robust LCMS/MS method for the simultaneous analysis in human plasma of three frequently used antifungal drugs: voriconazole, posaconazole, and itraconazole.

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Connections between the protein kinases that function within complex cell polarity networks are poorly understood. Rod-shaped fission yeast cells grow in a highly polarized manner, and genetic screens have identified many protein kinases, including the CaMKK-like Ssp1 and the MARK/PAR-1 family kinase Kin1, that are required for polarized growth and cell shape, but their functional mechanisms and connections have been unknown [1-5]. We found that Ssp1 promotes cell polarity by phosphorylating the activation loop of Kin1.

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Article Synopsis
  • * Two groups of patients were analyzed—one receiving clear liquids after about 5 days post-surgery and another starting clear liquids within 24 hours—which highlighted different outcomes in terms of stool passage and wound complications.
  • * The results showed no significant difference in major wound complications between the two groups, suggesting that early introduction of clear fluids might not increase risk and could potentially improve recovery post-surgery.
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We have developed an X-ray absorption near edge structure spectroscopy method using fluorescence detection for visualizing in vivo coordination environments of metals in biological specimens. This approach, which we term fluorescence imaging XANES (φXANES), allows us to spatially depict metal-protein associations in a native, hydrated state whilst avoiding intrinsic chemical damage from radiation. This method was validated using iron-challenged Caenorhabditis elegans to observe marked alterations in redox environment.

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Here, we present a sub-μm multimodal approach to image essential elements in Caenorhabditis elegans. A combination of chemical imaging technologies reveals total metal concentration, chemical state and the protein to which an element is associated. This application of distinct yet complementary chemical imaging techniques provided unique insight into essential and trace elements at the subcellular level.

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The effects of iron deficiency are well documented, but relatively little is known about the long-term implications of iron overload during development. High levels of redox-active iron in the brain have been associated with neurodegenerative disorders, most notably Parkinson disease, yet a gradual increase in brain iron seems to be a feature of normal ageing. Increased brain iron levels might result from intake of infant formula that is excessively fortified with iron, thereby altering the trajectory of brain iron uptake and amplifying the risk of iron-associated neurodegeneration in later life.

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Iron is essential for eukaryotic biochemistry. Systematic trafficking and storage is required to maintain supply of iron while preventing it from catalysing unwanted reactions, particularly the generation of oxidising reactive species. Iron dyshomeostasis has been implicated in major age-associated diseases including cancers, neurodegeneration and heart disease.

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Bone turnover markers (BTMs) are classified as either formation or resorption markers. Their concentrations in blood or urine of adults are considered to reflect the rate of bone remodelling and may be of use in the management of patients with bone disease. Major inter-method differences exist for BTMs, and harmonisation of methods is currently being pursued at an international level.

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Objective: Given evidence for clustering of signalling molecules and ion channels in cholesterol-rich membrane domains, the involvement of such structures in arteriolar smooth muscle mechanotransduction was examined.

Method: To determine the contribution of smooth muscle cholesterol-rich membrane domains to the myogenic response, isolated arterioles were exposed to the cholesterol-depleting agent beta-cyclodextrin (1-10 mM) in the absence and presence of excess exogenous cholesterol.

Results: beta-Cyclodextrin significantly impaired pressure-induced vasoconstriction, while excess cholesterol attenuated this effect.

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