keyword
https://read.qxmd.com/read/38648108/methods-for-screening-and-evaluation-of-antimicrobial-activity-a-review-of-protocols-advantages-and-limitations
#1
REVIEW
Tanim Jabid Hossain
Infectious diseases pose a formidable global challenge, compounded by the emergence of antimicrobial resistance. Consequently, researchers are actively exploring novel antimicrobial compounds as potential solutions. This endeavor underscores the pivotal role of methods employed for screening and evaluating antimicrobial activity-a critical step in discovery and characterization of antimicrobial agents. While traditional techniques such as well-diffusion, disk-diffusion, and broth-dilution are commonly utilized in antimicrobial assays, they may encounter limitations concerning reproducibility and speed...
April 22, 2024: European Journal of Microbiology & Immunology
https://read.qxmd.com/read/38647868/changing-patterns-of-organisms-causing-neonatal-sepsis-and-their-antimicrobial-sensitivity-profile-in-a-tertiary-center-a-prospective-study
#2
JOURNAL ARTICLE
Gayathiri Govindaraju, Balakrishnan Rajaiah, Srinivas Ramakrishnan, Deepak Thangaraju, Preethi Chandrasekar, Thangaraj Abiramalatha
OBJECTIVE: To identify the profile of organisms causing neonatal sepsis and their antibiotic susceptibility pattern in recent years. METHODS: In this prospective study, authors included neonates with blood culture proven sepsis. Antibiotic resistance patterns that were identified were extended spectrum β-lactamase, AmpC β-lactamase and possible carbapenamase producer. Xpert CARBA-R test was performed to identify genes causing carbapenem resistance. RESULTS: There were 210 neonates with 216 episodes of blood culture proven sepsis...
April 22, 2024: Indian Journal of Pediatrics
https://read.qxmd.com/read/38647729/establishment-of-a-novel-microfluidic-co-culture-system-for-simultaneous-analysis-of-multiple-indicators-of-gefitinib-sensitivity-in-colorectal-cancer-cells
#3
JOURNAL ARTICLE
Xin Li, Wanming Li, Jie Wang, Qun Wang, Menghu Liang, Shuo Chen, Wei Ba, Jin Fang
The therapeutic effect of gefitinib on colorectal cancer (CRC) is unclear, but it has been reported that stromal cells in the tumor microenvironment may have an impact on drug sensitivity. Herein, we established a microfluidic co-culture system and explored the sensitivity of CRC cells co-cultured with cancer-associated fibroblasts (CAFs) to gefitinib. The system consisted of a multichannel chip and a Petri dish. The chambers in the chip and dish were designed to continuously supply nutrients for long-term cell survival and create chemokine gradients for driving cell invasion without any external equipment...
April 22, 2024: Mikrochimica Acta
https://read.qxmd.com/read/38647630/-the-children-are-not-controllable-because-they-follow-western-values-narratives-of-the-parenting-experiences-of-african-immigrants-in-alberta-canada
#4
JOURNAL ARTICLE
Neelam Saleem Punjani, Philomina E Okeke-Ihejirika, Bukola Oladunni Salami, Sophie Yohani, Mary Olukotun
African immigrants are moving to high-income nations such as Canada in greater numbers in search of a better life. These immigrants frequently struggle with several issues, including limited social support, shifts in gender roles/status, cultural conflicts with their children, and language barriers. We used participatory action research (PAR) to gather data about Sub-Saharan African immigrants residing in Alberta, Canada, with a focus on their viewpoints, difficulties, and experiences of parenting children in Canada...
April 22, 2024: Journal of Immigrant and Minority Health
https://read.qxmd.com/read/38647491/possible-unintended-consequences-of-pediatric-clinician-strategies-for-communicating-about-social-emotional-and-developmental-concerns-in-diverse-young-children
#5
JOURNAL ARTICLE
Courtney L Scherr, Hannah Getachew-Smith, Sydney Moe, Ashley A Knapp, Allison J Carroll, Nivedita Mohanty, Seema Shah, Andrea E Spencer, Rinad S Beidas, Lauren S Wakschlag, Justin D Smith
INTRODUCTION: Screening to promote social-emotional well-being in toddlers has positive effects on long-term health and functioning. Communication about social-emotional well-being can be challenging for primary care clinicians for various reasons including lack of time, training and expertise, resource constraints, and cognitive burden. Therefore, we explored clinicians' perspectives on identifying and communicating with caregivers about social-emotional risk in toddlers. METHOD: In 2021, semistructured interviews were conducted with pediatric clinicians (N = 20) practicing in Federally Qualified Health Centers in a single metropolitan area...
March 2024: Families, Systems & Health: the Journal of Collaborative Family Healthcare
https://read.qxmd.com/read/38647326/live-imaging-to-quantify-cellular-radiosensitivity-in-patient-derived-tumor-organoids
#6
JOURNAL ARTICLE
Maud Charpentier, Norma Bloy, Silvia C Formenti, Lorenzo Galluzzi, Sandra Demaria
Radiation therapy (RT) is one of the mainstays of modern clinical cancer management. However, not all cancer types are equally sensitive to irradiation, often (but not always) because of differences in the ability of malignant cells to repair oxidative DNA damage as elicited by ionizing rays. Clonogenic assays have been employed for decades to assess the sensitivity of cultured cancer cells to ionizing irradiation, largely because irradiated cancer cells often die in a delayed manner that is difficult to quantify with short-term flow cytometry- or microscopy-assisted techniques...
April 5, 2024: Journal of Visualized Experiments: JoVE
https://read.qxmd.com/read/38646535/an-in-vitro-assay-for-toxicity-testing-of-clostridium-perfringens-type-c-%C3%AE-toxin
#7
JOURNAL ARTICLE
Marieke Hoonakker, Afshin Zariri, Lisette de Brouwer, Dionne David, Anouska Borgman, Arjen Sloots
INTRODUCTION: Veterinary vaccines against Clostridium perfringens type C need to be tested for absence of toxicity, as mandated by pharmacopoeias worldwide. This toxicity testing is required at multiple manufacturing steps and relies on outdated mouse tests that involve severe animal suffering. Clostridium perfringens type C produces several toxins of which the β-toxin is the primary component responsible for causing disease. Here, we describe the successful development of a new cell-based in vitro assay that can address the specific toxicity of the β-toxin...
2024: Frontiers in Immunology
https://read.qxmd.com/read/38646525/memory-b-cell-derived-donor-specific-antibodies-do-not-predict-outcome-in-sensitized-kidney-transplant-recipients-a-retrospective-single-center-study
#8
JOURNAL ARTICLE
Dania Altulea, Joost C van den Born, Arjan Diepstra, Laura Bungener, Dagmar Terpstra, Bouke G Hepkema, Rosa Lammerts, Peter Heeringa, Sebastiaan Heidt, Henny Otten, Leon Reteig, Gonca E Karahan, Stefan P Berger, Jan-Stephan Sanders
BACKGROUND: Repeated exposure to sensitizing events can activate HLA-specific memory B cells, leading to the production of donor-specific memory B cell antibodies (DSAm) that pose a risk for antibody-mediated rejection (ABMR) in kidney transplant recipients (KTRs). This single-center retrospective study aimed to identify DSAm and assess their association with outcomes in a cohort of KTRs with pretransplant serum donor-specific antibodies (DSA). METHODS: We polyclonally activated pretransplant peripheral blood mononuclear cells (PBMCs) from 60 KTRs in vitro, isolated and quantified IgG from the culture supernatant using ELISA, and analyzed the HLA antibodies of eluates with single antigen bead (SAB) assays, comparing them to the donor HLA typing for potential DSAm...
2024: Frontiers in Immunology
https://read.qxmd.com/read/38646201/a-rare-case-of-acute-post-cataract-surgery-endophthalmitis-associated-with-achromobacter-xylosoxidans
#9
Tai Wan Dien, Nor Fariza Ngah
Achromobacter xylosoxidans is rarely reported as a causative agent of post-cataract surgery endophthalmitis. Here, we present a case where timely surgical intervention preserved the patient's vision. A 68-year-old man presented with clinical signs of endophthalmitis in his right eye three days after uneventful cataract surgery. He was initially treated with intravitreal, topical, and systemic antibiotics. After starting intravitreal, topical, and systemic antibiotics, his condition deteriorated on the second day of treatment...
March 2024: Curēus
https://read.qxmd.com/read/38645890/the-first-case-report-of-inactive-nontuberculous-mycobacterial-pulmonary-disease-ntm-pd-in-a-pneumoconiosis-patient-caused-by-mycobacterium-europaeum-in-china
#10
Jiaqing Zhou, Huan Xu, Wen Du, Lijun Peng
We reported a 51-year-old male electric welder with stage I pneumoconiosis, who had no significant cough, sputum, fever, chest pain, or other discomfort. However, regular physical examination at our hospital revealed bilateral pulmonary nodules with cavity formation. Blood routine, liver or kidney function, and infection-related biomarkers, including interleukin-6 (IL-6), high-sensitivity C-reactive protein (hs-CRP), and procalcitonin (PCT), were normal. Sputum and alveolar lavage fluid (BALF) acid-fast bacilli (AFB) smears, BALF Mycobacterium tuberculosis (TB) PCR, and T-SPOT...
2024: Infection and Drug Resistance
https://read.qxmd.com/read/38645876/endovascular-repair-and-prognosis-of-patients-with-brucella-abortus-infection-induced-aorto-iliac-aneurysm
#11
JOURNAL ARTICLE
Yujing Zhang, Haiqian Wang, Lei Bai, Xiaodong Li, Li Liu, Liang Wang
OBJECTIVE: To establish the endovascular repair and prognosis of patients with aorto-iliac aneurysm and Brucella abortus infection. METHODS: From September 2018 to September 2021, seven cases of Brucella abortus infection with aorto-iliac aneurysm were treated by the endovascular aneurysm repair (EVAR) procedure. Clinical and imaging data were collected to evaluate the therapeutic results, including body temperature, blood culture, imaging manifestations, stent patency and endoleak during the postoperative and follow-up periods...
2024: Journal of Inflammation Research
https://read.qxmd.com/read/38645223/the-neuroendocrine-transition-in-prostate-cancer-is-dynamic-and-dependent-on-ascl1
#12
Rodrigo Romero, Tinyi Chu, Tania J González-Robles, Perianne Smith, Yubin Xie, Harmanpreet Kaur, Sara Yoder, Huiyong Zhao, Chenyi Mao, Wenfei Kang, Maria V Pulina, Kayla E Lawrence, Anuradha Gopalan, Samir Zaidi, Kwangmin Yoo, Jungmin Choi, Ning Fan, Olivia Gerstner, Wouter R Karthaus, Elisa DeStanchina, Kelly V Ruggles, Peter M K Westcott, Ronan Chaligné, Dana Pe'er, Charles L Sawyers
Lineage plasticity is a recognized hallmark of cancer progression that can shape therapy outcomes. The underlying cellular and molecular mechanisms mediating lineage plasticity remain poorly understood. Here, we describe a versatile in vivo platform to identify and interrogate the molecular determinants of neuroendocrine lineage transformation at different stages of prostate cancer progression. Adenocarcinomas reliably develop following orthotopic transplantation of primary mouse prostate organoids acutely engineered with human-relevant driver alterations (e...
April 11, 2024: bioRxiv
https://read.qxmd.com/read/38645013/intact-and-degenerate-diguanylate-cyclases-regulate-shigella-cyclic-di-gmp
#13
Ruchi Ojha, Stefanie Krug, Prentiss Jones, Benjamin J Koestler
The intracellular human pathogen Shigella invades the colonic epithelium to cause disease. Prior to invasion, this bacterium navigates through different environments within the human body, including the stomach and the small intestine. To adapt to changing environments, Shigella uses the bacterial second messenger c-di-GMP signaling system, synthesized by diguanylate cyclases (DGCs) encoding GGDEF domains. Shigella flexneri encodes a total of 9 GGDEF or GGDEF-EAL domain enzymes in its genome, but 5 of these genes have acquired mutations that presumably inactivated the c-di-GMP synthesis activity of these enzymes...
April 8, 2024: bioRxiv
https://read.qxmd.com/read/38644998/fibroblast-stromal-support-model-for-predicting-human-papillomavirus-associated-cancer-drug-responses
#14
Claire D James, Rachel L Lewis, Alexis L Fakunmoju, Austin J Witt, Aya H Youssef, Xu Wang, Nabiha M Rais, Apurva Tadimari Prabhakar, Raymonde Otoa, Molly L Bristol
UNLABELLED: Currently, there are no specific antiviral therapeutic approaches targeting Human papillomaviruses (HPVs), which cause around 5% of all human cancers. Specific antiviral reagents are particularly needed for HPV-related oropharyngeal cancers (HPV + OPCs) whose incidence is increasing and for which there are no early diagnostic tools available. We and others have demonstrated that the estrogen receptor alpha (ERα) is overexpressed in HPV + OPCs, compared to HPV-negative cancers in this region, and that these elevated levels are associated with an improved disease outcome...
April 12, 2024: bioRxiv
https://read.qxmd.com/read/38644473/protac-ezh2-degrader-1-overcomes-the-resistance-of-podophyllotoxin-derivatives-in-refractory-small-cell-lung-cancer-with-leptomeningeal-metastasis
#15
JOURNAL ARTICLE
Min-Xing Shi, Xi Ding, Liang Tang, Wei-Jun Cao, Bo Su, Jie Zhang
BACKGROUND: Leptomeningeal metastasis (LM) of small cell lung cancer (SCLC) is a highly detrimental occurrence associated with severe neurological disorders, lacking effective treatment currently. Proteolysis-targeting chimeric molecules (PROTACs) may provide new therapeutic avenues for treatment of podophyllotoxin derivatives-resistant SCLC with LM, warranting further exploration. METHODS: The SCLC cell line H128 expressing luciferase were mutated by MNNG to generate H128-Mut cell line...
April 22, 2024: BMC Cancer
https://read.qxmd.com/read/38643909/comparison-of-the-function-of-two-novel-human-dopamine-d2-receptor-variants-identifies-a-likely-mechanism-for-their-pathogenicity
#16
JOURNAL ARTICLE
Dayana Rodriguez-Contreras, Javier García-Nafría, Amy E Chan, Ujwal Shinde, Kim A Neve
Two recently discovered DRD2 mutations, c.634A > T, p.Ile212Phe and c.1121 T > G, p.Met374Arg, cause hyperkinetic movement disorders that have overlapping features but apparently differ in severity. The two known carriers of the Met374Arg variant had early childhood disease onset and more severe motor, cognitive, and neuropsychiatric deficits than any known carriers of the Ile212Phe variant, whose symptoms were first apparent in adolescence. Here, we evaluated if differences in the function of the two variants in cultured cells could explain differing pathogenicity...
April 19, 2024: Biochemical Pharmacology
https://read.qxmd.com/read/38643643/differentiation-and-quantification-of-extracellular-polymeric-substances-from-microalgae-and-bacteria-in-the-mixed-culture
#17
JOURNAL ARTICLE
Tian Ren, Yun Zhou, Xiaocai Cui, Beibei Wu, Bruce E Rittmann
Extracellular polymeric substances (EPS) play significant roles in the formation, function, and interactions of microalgal-bacteria consortia. Understanding the key roles of EPS depends on reliable extraction and quantification methods, but differentiating of EPS from microalgae versus bacteria is challenging. In this work, cation exchange resin (CER) and thermal treatments were applied for total EPS extraction from microalgal-bacteria mixed culture (MBMC), flow cytometry combined with SYTOX Green staining was applied to evaluate cell disruption during EPS extraction, and auto-fluorescence-based cell sorting (AFCS) was used to separate microalgae and bacteria in the MBMC...
April 18, 2024: Water Research
https://read.qxmd.com/read/38643344/from-urban-ecology-to-urban-enquiry-how-to-build-cumulative-and-context-sensitive-understandings
#18
JOURNAL ARTICLE
Erik Andersson, Timon McPhearson, Steward T A Pickett
This paper positions urban ecology as increasingly conversant with multiple perspectives and methods for understanding the functions and qualities of diverse cities and urban situations. Despite progress in the field, we need clear pathways for positioning, connecting and synthesising specific knowledge and to make it speak to more systemic questions about cities and the life within them. These pathways need to be able to make use of diverse sources of information to better account for the diverse relations between people, other species and the ecological, social, cultural, economic, technical and increasingly digital structures that they are embedded in...
April 20, 2024: Ambio
https://read.qxmd.com/read/38643253/interleukin-1%C3%AE-links-peripheral-ca-v-2-2-channel-activation-to-rapid-adaptive-increases-in-heat-sensitivity-in-skin
#19
JOURNAL ARTICLE
Anne-Mary N Salib, Meredith J Crane, Sang Hun Lee, Brian J Wainger, Amanda M Jamieson, Diane Lipscombe
Neurons have the unique capacity to adapt output in response to changes in their environment. Within seconds, sensory nerve endings can become hypersensitive to stimuli in response to potentially damaging events. The underlying behavioral response is well studied, but several of the key signaling molecules that mediate sensory hypersensitivity remain unknown. We previously discovered that peripheral voltage-gated CaV 2.2 channels in nerve endings in skin are essential for the rapid, transient increase in sensitivity to heat, but not to mechanical stimuli, that accompanies intradermal capsaicin...
April 20, 2024: Scientific Reports
https://read.qxmd.com/read/38642816/an-in-silico-analysis-of-hydrodynamics-and-gas-mass-transfer-characteristics-in-scale-down-models-for-mammalian-cell-cultures
#20
JOURNAL ARTICLE
Alaina Anand, Madelynn McCahill, John Thomas, Aishwarya Sood, Jonathan Kinross, Aparajita Dasgupta, Aravindan Rajendran
Bioprocess scale-up and technology transfer can be challenging due to multiple variables that need to be optimized during process development from laboratory scale to commercial manufacturing. Cell cultures are highly sensitive to key factors during process transfer across scales, including geometric variability in bioreactors, shear stress from impeller and sparging activity, and nutrient gradients that occur due to increasing blend times. To improve the scale-up and scale-down of these processes, it is important to fully characterize bioreactors to better understand the differences that will occur within the culture environment, especially the hydrodynamic profiles that will vary in vessel designs across scales...
April 18, 2024: Journal of Biotechnology
keyword
keyword
49793
1
2
Fetch more papers »
Fetching more papers... Fetching...
Remove bar
Read by QxMD icon Read
×

Save your favorite articles in one place with a free QxMD account.

×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"

We want to hear from doctors like you!

Take a second to answer a survey question.