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Brian hannah

Hannah R Shanks, Mingning Zhu, Amir H Milani, James Turton, Sarah Haigh, Nigel W Hodson, Daman Adlam, Judith Hoyland, Tony Freemont, Brian R Saunders
Polymer dots (PDs) are promising fluorescent probes for biomaterials applications. Here, novel cytocompatible composite PD particles have been synthesised with a core-shell-shell morphology. The particles show near-infrared emission, improved fluorescent brightness and enhanced colloidal stability compared to pure PDs. The particles also show non-radiative resonance energy transfer (NRET) with a model dye.
August 6, 2018: Chemical Communications: Chem Comm
Hannah E Ledvina, Katherine A Kelly, Aria Eshraghi, Rachael L Plemel, S Brook Peterson, Brian Lee, Shaun Steele, Marlen Adler, Thomas H Kawula, Alexey J Merz, Shawn J Skerrett, Jean Celli, Joseph D Mougous
Many pathogenic intracellular bacteria manipulate the host phago-endosomal system to establish and maintain a permissive niche. The fate and identity of these intracellular compartments is controlled by phosphoinositide lipids. By mechanisms that have remained undefined, a Francisella pathogenicity island-encoded secretion system allows phagosomal escape and replication of bacteria within host cell cytoplasm. Here we report the discovery that a substrate of this system, outside pathogenicity island A (OpiA), represents a family of wortmannin-resistant bacterial phosphatidylinositol (PI) 3-kinase enzymes with members found in a wide range of intracellular pathogens, including Rickettsia and Legionella spp...
July 24, 2018: Cell Host & Microbe
Matthew L Yuknis, Elizabeth Weinstein, Hannah Maxey, Lori Price, Sierra X Vaughn, Tom Arkins, Brian D Benneyworth
: media-1vid110.1542/5789654354001PEDS-VA_2017-3082 Video Abstract BACKGROUND: Management of pediatric emergencies is challenging for ambulatory providers because these rare events require preparation and planning tailored to the expected emergencies. The current recommendations for pediatric emergencies in ambulatory settings are based on 20-year-old survey data. We aimed to objectively identify the frequency and etiology of pediatric emergencies in ambulatory practices. METHODS: We examined pediatric emergency medical services (EMS) runs originating from ambulatory practices in the greater Indianapolis metropolitan area between January 1, 2012, and December 31, 2014...
August 2018: Pediatrics
Samantha M Harvey, Brian T Phelan, Daniel C Hannah, Kristen E Brown, Ryan M Young, Matthew S Kirschner, Michael R Wasielewski, Richard D Schaller
We report femtosecond stimulated Raman spectroscopy (FSRS) measurements on dispersions of CdSe semiconductor nanocrystals (NCs) as a function of particle size and pump fluence. Upon photoexcitation, we observe depletion of stimulated Raman gain corresponding to generation of longitudinal optical (LO) phonons followed by recovery on picosecond timescales. At higher fluences, production of multiple excitons slows recovery of FSRS signals, which we attribute to sustained increases of LO phonon populations due to multiexcitonic Auger heating...
July 26, 2018: Journal of Physical Chemistry Letters
Caigang Zhu, Hannah L Martin, Brian T Crouch, Amy F Martinez, Martin Li, Gregory M Palmer, Mark W Dewhirst, Nimmi Ramanujam
The shifting metabolic landscape of aggressive tumors, with fluctuating oxygenation conditions and temporal changes in glycolysis and mitochondrial metabolism, is a critical phenomenon to study in order to understand negative treatment outcomes. Recently, we have demonstrated near-simultaneous optical imaging of mitochondrial membrane potential (MMP) and glucose uptake in non-tumor window chambers, using the fluorescent probes tetramethylrhodamine ethyl ester (TMRE) and 2-N-(7-nitrobenz-2-oxa-1,3-diazol-4-yl)amino)-2-deoxyglucose (2-NBDG)...
July 1, 2018: Biomedical Optics Express
Nicole K Campbell, Hannah K Fitzgerald, Anna Malara, Roisin Hambly, Cheryl M Sweeney, Brian Kirby, Jean M Fletcher, Aisling Dunne
Psoriasis is a chronic autoimmune disease mediated by dysregulated immune responses in dendritic cells (DC) and T cells. The stress-response enzyme heme oxygenase-1 (HO-1) has been described as protective in animal models of psoriasis, however, implementation of HO-1-based therapies is hindered by the lack of clinically-suitable HO-1 inducers. The plant-derived polyphenols, carnosol and curcumin, have been identified as candidate HO-1 inducers however there has been little investigation into their effects on human immune cells...
July 6, 2018: Scientific Reports
Joseph Geiger, Bridget A Morton, Elton Jose Rosas Vasconcelos, Maryam Tngrian, Malika Kachani, Eduardo A Barrón, Cesar M Gavidia, Robert H Gilman, Noelia P Angulo, Richard Lerner, Scott Tamerin, Hannah Mirrashed, Brian Oakley, Pedro Paulo V P Diniz
Ehrlichia spp. are emerging infectious pathogens, especially in the Americas. Although Ehrlichia canis is primarily a parasite of dogs, PCR-confirmed human infections have been reported from Mexico, Venezuela, and Costa Rica. This study reports the presence of E. canis DNA in 13.7% of 205 dogs from urban areas in Peru and of those, five were analyzed for phylogenetic variation using the Tandem Repeat Protein 36 (TRP36) gene. The use of the TRP36 gene for such analysis was validated against 16S rRNA and GroEL using Shannon's entropy bioinformatic approach...
June 25, 2018: American Journal of Tropical Medicine and Hygiene
Zihan Yan, Zeenat A Shyr, Manuela Fortunato, Alecia Welscher, Mariana Alisio, Michael Martino, Brian N Finck, Hannah Conway, Maria S Remedi
AIMS: To examine the effects of a high-fat-diet (HFD) on monogenic neonatal diabetes, without the confounding effects of compensatory hyperinsulinaemia. METHODS: Mice expressing KATP channel gain-of-function (KATP -GOF) mutations, which models human neonatal diabetes, were fed an HFD. RESULTS: Surprisingly, KATP -GOF mice exhibited resistance to HFD-induced obesity, accompanied by markedly divergent blood glucose control, with some KATP -GOF mice showing persistent diabetes (KATP -GOF-non-remitter [NR] mice) and others showing remission of diabetes (KATP -GOF-remitter [R] mice)...
June 12, 2018: Diabetes, Obesity & Metabolism
Gurjot S Walia, Jeffrey Aston, Ricardo Bello, Gina A Mackert, Rachel A Pedreira, Brian H Cho, Hannah M Carl, Erin M Rada, Gedge D Rosson, Justin M Sacks
Background: Traditionally, tissue expanders (TEs) for breast reconstruction have been placed beneath the pectoralis major muscle with or without acellular dermal matrix. More recently, full acellular dermal matrix coverage has been described for prepectoral TE placement. Our study aims to explore differences in clinical and quality-of-life (QOL) outcomes for prepectoral versus subpectoral TE breast reconstruction. Methods: We identified patients who underwent postmastectomy breast reconstruction with prepectoral or subpectoral TE placement between 2011 and 2015 and completed QOL surveys...
April 2018: Plastic and Reconstructive Surgery. Global Open
Anjuli S Bodapati, Hannah L Combs, Nicholas J Pastorek, Brian Miller, Maya Troyanskaya, Jennifer Romesser, Anita Sim, John Linck
OBJECTIVE: As part of routine care at Veterans Affairs facilities, veterans with a service-related traumatic brain injury (TBI) are administered a self-report post-concussive symptom measure, the Neurobehavioral Symptom Inventory (NSI). Interpreting the NSI can be problematic given that over-reporting on self-report measures is often found in both civilian and military patient populations. This study investigates embedded scales on the NSI that identify possible and probable symptom exaggeration...
June 5, 2018: Clinical Neuropsychologist
Hannah K Smalley, Nishi Anand, Dylan Buczek, Nicholas Buczek, Timothy Lin, Tanay Rajore, Muriel Wacker, Sridhar V Basavaraju, Brian M Gurbaxani, Teresa Hammett, Pinar Keskinocak, Joel Sokol, Matthew J Kuehnert
BACKGROUND: There were 13 documented clusters of infectious encephalitis transmission via organ transplant from deceased donors to recipients during 2002-2013. Hence, organs from donors diagnosed with encephalitis are often declined because of concerns about the possibility of infection, given that there is no quick and simple test to detect causes of infectious encephalitis. METHODS: We constructed a database containing cases of infectious and non-infectious encephalitis...
May 29, 2018: Transplant Infectious Disease: An Official Journal of the Transplantation Society
Lindsey A Sjaarda, Katherine A Ahrens, Daniel L Kuhr, Tiffany L Holland, Ukpebo R Omosigho, Brian T Steffen, Natalie L Weir, Hannah K Tollman, Robert M Silver, Michael Y Tsai, Enrique F Schisterman
BACKGROUND: Placental dysfunction is related to many pregnancy complications, but collecting placental specimens for investigation in large scale epidemiologic studies is often infeasible. Standard procedures involving immediate collection after birth and snap freezing are often cost prohibitive. We aimed to collect pilot data regarding the feasibility and precision of a simpler approach, the collection of tissue samples following 24 hours of refrigeration of whole placentae at 4°C, as compared to the "gold standard" of snap freezing excised tissue within 40 minutes of delivery for the assessment of inflammatory cytokines...
2018: PloS One
Felipe C Geyer, Anqi Li, Anastasios D Papanastasiou, Alison Smith, Pier Selenica, Kathleen A Burke, Marcia Edelweiss, Huei-Chi Wen, Salvatore Piscuoglio, Anne M Schultheis, Luciano G Martelotto, Fresia Pareja, Rahul Kumar, Alissa Brandes, Dan Fan, Thais Basili, Arnaud Da Cruz Paula, John R Lozada, Pedro Blecua, Simone Muenst, Achim A Jungbluth, Maria P Foschini, Hannah Y Wen, Edi Brogi, Juan Palazzo, Brian P Rubin, Charlotte K Y Ng, Larry Norton, Zsuzsanna Varga, Ian O Ellis, Emad A Rakha, Sarat Chandarlapaty, Britta Weigelt, Jorge S Reis-Filho
Adenomyoepithelioma of the breast is a rare tumor characterized by epithelial-myoepithelial differentiation, whose genetic underpinning is largely unknown. Here we show through whole-exome and targeted massively parallel sequencing analysis that whilst estrogen receptor (ER)-positive adenomyoepitheliomas display PIK3CA or AKT1 activating mutations, ER-negative adenomyoepitheliomas harbor highly recurrent codon Q61 HRAS hotspot mutations, which co-occur with PIK3CA or PIK3R1 mutations. In two- and three-dimensional cell culture models, forced expression of HRASQ61R in non-malignant ER-negative breast epithelial cells with or without a PIK3CAH1047R somatic knock-in results in transformation and the acquisition of the cardinal features of adenomyoepitheliomas, including the expression of myoepithelial markers, a reduction in E-cadherin expression, and an increase in AKT signaling...
May 8, 2018: Nature Communications
Rachel Pedreira, Charalampos Siotos, Brian H Cho, Stella M Seal, Deepa Bhat, Hannah M Carl, Michelle Seu, J P Wolinksy, Justin M Sacks
BACKGROUND:  Resection of primary spinal tumors requires reconstruction for restoration of spinal column stability. Traditionally, some combination of bone grafting and instrumentation is implemented. However, delayed healing environments are associated with pseudoarthrodesis and failure. Implementation of vascularized bone grafting (VBG) to complement hardware may present a solution. We evaluated the use of VBG in oncologic spinal reconstruction via systematic review and pooled analysis of literature...
May 2, 2018: Journal of Reconstructive Microsurgery
Darby Saxbe, Geoffrey W Corner, Mona Khaled, Katelyn Horton, Brian Wu, Hannah Lyden Khoddam
Men appear to gain weight during the transition to parenthood, and fathers are heavier than non-fathers. Paternal perinatal weight gain may set weight trajectories in midlife and have long-term health implications. Since men do not undergo the physical demands of pregnancy and breastfeeding, the specific mechanisms underlying weight gain in new fathers warrant investigation. This review aims to stimulate research on paternal perinatal weight gain by suggesting testable potential mechanisms that (1) show change across the transition to parenthood and (2) play a role in weight and body composition...
June 11, 2018: Health Psychology Review
Michael R Wilson, Brian D O'Donovan, Jeffrey M Gelfand, Hannah A Sample, Felicia C Chow, John P Betjemann, Maulik P Shah, Megan B Richie, Mark P Gorman, Rula A Hajj-Ali, Leonard H Calabrese, Kelsey C Zorn, Eric D Chow, John E Greenlee, Jonathan H Blum, Gary Green, Lillian M Khan, Debarko Banerji, Charles Langelier, Chloe Bryson-Cahn, Whitney Harrington, Jairam R Lingappa, Niraj M Shanbhag, Ari J Green, Bruce J Brew, Ariane Soldatos, Luke Strnad, Sarah B Doernberg, Cheryl A Jay, Vanja Douglas, S Andrew Josephson, Joseph L DeRisi
Importance: Identifying infectious causes of subacute or chronic meningitis can be challenging. Enhanced, unbiased diagnostic approaches are needed. Objective: To present a case series of patients with diagnostically challenging subacute or chronic meningitis using metagenomic next-generation sequencing (mNGS) of cerebrospinal fluid (CSF) supported by a statistical framework generated from mNGS of control samples from the environment and from patients who were noninfectious...
April 16, 2018: JAMA Neurology
Laurence E Court, Kelly Kisling, Rachel McCarroll, Lifei Zhang, Jinzhong Yang, Hannah Simonds, Monique du Toit, Chris Trauernicht, Hester Burger, Jeannette Parkes, Mike Mejia, Maureen Bojador, Peter Balter, Daniela Branco, Angela Steinmann, Garrett Baltz, Skylar Gay, Brian Anderson, Carlos Cardenas, Anuja Jhingran, Simona Shaitelman, Oliver Bogler, Kathleen Schmeller, David Followill, Rebecca Howell, Christopher Nelson, Christine Peterson, Beth Beadle
The Radiation Planning Assistant (RPA) is a system developed for the fully automated creation of radiotherapy treatment plans, including volume-modulated arc therapy (VMAT) plans for patients with head/neck cancer and 4-field box plans for patients with cervical cancer. It is a combination of specially developed in-house software that uses an application programming interface to communicate with a commercial radiotherapy treatment planning system. It also interfaces with a commercial secondary dose verification software...
April 11, 2018: Journal of Visualized Experiments: JoVE
Jeffrey P Chance, Hannah Fejzic, Obiel Hernandez, Eva S Istvan, Armann Andaya, Nikolay Maslov, Ruby Aispuro, Teodulo Crisanto, Huyen Nguyen, Brian Vidal, Whitney Serrano, Bradley Kuwahara, Corey Pugne Andanado, Daniel E Goldberg, Jeremy P Mallari
The human parasite Plasmodium falciparum kills an estimated 445,000 people a year, with the most fatalities occurring in African children. Previous studies identified falcilysin (FLN) as a malarial metalloprotease essential for parasite development in the human host. Despite its essentiality, the biological roles of this protease are not well understood. Here we describe the optimization of a piperazine-based hydroxamic acid scaffold to develop the first reported inhibitors of FLN. Inhibitors were tested against cultured parasites, and parasiticidal activity correlated with potency against FLN...
June 1, 2018: Bioorganic & Medicinal Chemistry Letters
Ajaz Bulbul, Patrick M Forde, Ayesha Murtuza, Brian Woodward, Hannah Yang, Ingmar Bastian, Parissa K Ferguson, Fernando Lopez-Diaz, David S Ettinger, Hatim Husain
Brain metastases are common in patients with non-small-cell lung cancer (NSCLC). Because of associated poor prognosis and limited specific treatment options, there is a real need for the development of medical therapies and strategies for affected patients. Novel compounds for epidermal growth factor receptor-dependent and anaplastic lymphoma kinase-dependent lung cancer have demonstrated blood-brain barrier permeability and have led to important improvements in central nervous system outcomes. Studies of targeted therapies for oncogene-driven tumors and of immunotherapies in patients with brain metastases have shown promise and, allied with novel radiation techniques, are driving a rapid evolution in treatment and prognosis for NSCLC brain metastases...
April 15, 2018: Oncology (Williston Park, NY)
Jennifer M Wenzel, Erik B Oleson, Willard N Gove, Anthony B Cole, Utsav Gyawali, Hannah M Dantrassy, Rebecca J Bluett, Dilyan I Dryanovski, Garret D Stuber, Karl Deisseroth, Brian N Mathur, Sachin Patel, Carl R Lupica, Joseph F Cheer
Phasic dopamine (DA) release accompanies approach toward appetitive cues. However, a role for DA in the active avoidance of negative events remains undetermined. Warning signals informing footshock avoidance are associated with accumbal DA release, whereas depression of DA is observed with unavoidable footshock. Here, we reveal a causal role of phasic DA in active avoidance learning; specifically, optogenetic activation of DA neurons facilitates avoidance, whereas optical inhibition of these cells attenuates it...
May 7, 2018: Current Biology: CB
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