943 results match your criteria reversing negative


Reversing the Trend of Antimicrobial Resistance in ICU: Role of Antimicrobial and Diagnostic Stewardship.

Indian J Crit Care Med 2021 Jun;25(6):635-641

Department of Microbiology, Dr Ram Manohar Lohia Institute of Medical Sciences, Lucknow, Uttar Pradesh, India.

Background: Increasing antimicrobial resistance (AMR) among common bacteria combined with the slow development of new antibiotics has posed a challenge to clinicians.

Aim And Objective: To demonstrate whether antimicrobial and diagnostic stewardship program (ASP and DSP)-related interventions improve antibiotic susceptibilities among common bacteria causing bloodstream infections (BSI) in patients admitted to the intensive care unit (ICU) and whether these resulted in changes in the volume of antimicrobial consumption.

Materials And Methods: We compared the susceptibility patterns of gram-negative bacteria (GNB) and gram-positive cocci (GPC) causing BSI and changes in the volume of antibiotics prescribed for the same before and after 2017 by a retrospective analysis. Read More

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Differential but Concerted Expression of HSD17B2, HSD17B3, SHBG and SRD5A1 Testosterone Tetrad Modulate Therapy Response and Susceptibility to Disease Relapse in Patients with Prostate Cancer.

Cancers (Basel) 2021 Jul 12;13(14). Epub 2021 Jul 12.

Department of Urology, Taipei Medical University-Shuang Ho Hospital, New Taipei City 23561, Taiwan.

: Testosterone plays a critical role in prostate development and pathology. However, the impact of the molecular interplay between testosterone-associated genes on therapy response and susceptibility to disease relapse in PCa patients remains underexplored. : This study investigated the role of dysregulated or aberrantly expressed testosterone-associated genes in the enhanced dissemination, phenoconversion, and therapy response of treatment-resistant advanced or recurrent PCa. Read More

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Morphological screening of mesenchymal mammary tumor organoids to identify drugs that reverse epithelial-mesenchymal transition.

Nat Commun 2021 07 12;12(1):4262. Epub 2021 Jul 12.

Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA.

The epithelial-mesenchymal transition (EMT) has been implicated in conferring stem cell properties and therapeutic resistance to cancer cells. Therefore, identification of drugs that can reprogram EMT may provide new therapeutic strategies. Here, we report that cells derived from claudin-low mammary tumors, a mesenchymal subtype of triple-negative breast cancer, exhibit a distinctive organoid structure with extended "spikes" in 3D matrices. Read More

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Time to Fix the Damage of Weakened Chemical Disaster Prevention Regulations.

New Solut 2021 Jul 4:10482911211030609. Epub 2021 Jul 4.

University of Massachusetts Lowell, Lowell, USA.

The Trump administration weakened regulations through changes on rules that have been improved during the Obama years. An example is the reversal in 2019 of the improvements to the U.S. Read More

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Structure-activity relationship and mechanism of flavonoids on the inhibitory activity of P-glycoprotein (P-gp)-mediated transport of rhodamine123 and daunorubicin in P-gp overexpressed human mouth epidermal carcinoma (KB/MDR) cells.

Food Chem Toxicol 2021 Jul 1;155:112381. Epub 2021 Jul 1.

Key Laboratory of Environment Correlative Dietology (Huazhong Agricultural University), Ministry of Education, Wuhan, 430070, PR China. Electronic address:

This study was aimed to investigate the inhibitory activity of flavonoids on P-glycoprotein (P-gp). Effects of 39 flavonoids on the cellular uptake (CU) of rhodamine123 (Rho) and daunomycin (DNR) were investigated in both parental KB and P-gp overexpressed KB/MDR cells. The inhibition mechanism of selected flavonoids was further investigated by measuring the ATPase activity and expression level of P-gp. Read More

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The Long-Term DEHP Exposure Confers Multidrug Resistance of Triple-Negative Breast Cancer Cells through ABC Transporters and Intracellular ROS.

Antioxidants (Basel) 2021 Jun 11;10(6). Epub 2021 Jun 11.

The Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan.

The characteristics of phthalates had been thought to be similar to endocrine disruptors, which increases cancer risk. The role of phthalates in acquired drug resistance remains unclear. In this study, we investigated the effect of di-(2-ethylhexyl) phthalate (DEHP) on acquired drug resistance in breast cancer. Read More

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Intraocular pressure and choroidal thickness respond differently to lower body negative pressure during spaceflight.

J Appl Physiol (1985) 2021 06 24. Epub 2021 Jun 24.

KBR (United States), Houston, Texas, United States.

Spaceflight associated neuro-ocular syndrome (SANS) develops during long-duration (>1 month) spaceflight presumably because of chronic exposure to a headward fluid shift that occurs in weightlessness. We aimed to determine whether reversing this headward fluid shift with acute application of lower body negative pressure (LBNP) can influence outcome measures at the eye. Intraocular pressure (IOP) and subfoveal choroidal thickness were therefore evaluated by tonometry and optical coherence tomography (OCT), respectively, in 14 International Space Station crewmembers before flight in the seated, supine, and 15° head-down tilt (HDT) postures and during spaceflight, without and with application of 25 mmHg LBNP. Read More

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Long-term assessment of ecosystem services at ecological restoration sites using Landsat time series.

PLoS One 2021 23;16(6):e0243020. Epub 2021 Jun 23.

Faculty of Geo-Information Science and Earth Observation (ITC), University of Twente, Enschede, The Netherlands.

Reversing ecological degradation through restoration activities is a key societal challenge of the upcoming decade. However, lack of evidence on the effectiveness of restoration interventions leads to inconsistent, delayed, or poorly informed statements of success, hindering the wise allocation of resources, representing a missed opportunity to learn from previous experiences. This study contributes to a better understanding of spatial and temporal dynamics of ecosystem services at ecological restoration sites. Read More

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The role of social network support in treatment outcomes for medication for opioid use disorder: A systematic review.

J Subst Abuse Treat 2021 Aug 16;127:108367. Epub 2021 Mar 16.

Yale Institute for Network Science, Yale University, United States of America; Frank H. Netter MD School of Medicine, United States of America.

Background: Social connections can lead to contagion of healthy behaviors. Successful treatment of patients with opioid use disorder may lay in rebuilding social networks. Strong social networks of support can reinforce the benefits of medication treatments that are the current standard of care and the most effective tool physicians have to fight the opioid epidemic. Read More

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Reversing Chemotherapy Resistance by a Synergy between Lysosomal pH-Activated Mitochondrial Drug Delivery and Erlotinib-Mediated Drug Efflux Inhibition.

ACS Appl Mater Interfaces 2021 Jun 16. Epub 2021 Jun 16.

National Engineering Research Center for Biomaterials, College of Biomedical Engineering, Sichuan University, Chengdu 610064, China.

Mitochondrial drug delivery has attracted increasing attention in various mitochondrial dysfunction-associated disorders such as cancer owing to the important role of energy production. Herein, we report a lysosomal pH-activated mitochondrial-targeting polymer nanoparticle to overcome drug resistance by a synergy between mitochondrial delivery of doxorubicin (DOX, an anticancer drug) and erlotinib-mediated inhibition of drug efflux. The obtained nanoparticles, DE-NPs could maintain negative charge and have long blood circulation while undergoing charge reversal at lysosomal pH after internalization by cancer cells. Read More

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Cyclic nucleotide-dependent ionic currents in olfactory receptor neurons of the hawkmoth Manduca sexta suggest pull-push sensitivity modulation.

Eur J Neurosci 2021 Jun 14. Epub 2021 Jun 14.

Biologie, Tierphysiologie, Philipps-Universität Marburg, Marburg, Germany.

Olfactory receptor neurons (ORNs) of the hawkmoth Manduca sexta sensitize via cAMP- and adapt via cGMP-dependent mechanisms. Perforated patch clamp recordings distinguished 11 currents in these ORNs. Derivatives of cAMP and/or cGMP antagonistically affected three of five K currents and two non-specific cation currents. Read More

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Mood during pregnancy: Trends, structure, and invariance by gestational day.

J Psychiatr Res 2021 Aug 7;140:260-266. Epub 2021 Jun 7.

Department of Psychological and Brain Sciences, University of Iowa, United States.

Mood dynamics during pregnancy are important in understanding a critical period of human development, and also as a model for biopsychosocial stress processes. Here, in four large samples of smartphone app respondents (differentiated by time period and number of responses), we modeled mood for each gestational day during the pregnancy period. We aimed to delineate patterns of changes in mood across pregnancy, as well as potential changes in measurement properties across the period. Read More

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A novel role for an old target: CD45 for breast cancer immunotherapy.

Oncoimmunology 2021 May 25;10(1):1929725. Epub 2021 May 25.

Felsenstein Medical Research Center, Sackler School of Medicine, Tel Aviv University, Petach Tikva, Israel.

Breast cancer subtypes have not shown significant response to current immunomodulatory therapies. Although most subtypes are treatable, triple negative breast cancer (TNBC), an aggressive highly metastatic cancer, comprising 10-20% of breast cancers, remains an unmet medical need. New strategies are needed in order to overcome flaws in the responsiveness to current TNBC therapies. Read More

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Inhibition of triple negative breast cancer metastasis and invasiveness by novel drugs that target epithelial to mesenchymal transition.

Sci Rep 2021 Jun 3;11(1):11757. Epub 2021 Jun 3.

Department of Pediatrics, Faculty of Medicine and Dentistry, University of Alberta, 3-020R Katz Group Centre for Pharmacy and Health Research, Edmonton, AB, T6G 2E1, Canada.

Invasive breast cancer (BrCa) is predicted to affect 1 in 9 women in a lifetime;1 in 32 will die from this disease. The most aggressive forms of BrCa, basal-like/triple-negative phenotype (TNBC), are challenging to treat and result in higher mortality due high number of metastatic cases. There is a paucity of options for TNBC treatment, which highlights the need for additional innovative treatment approaches. Read More

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Impact of an Antimicrobial Stewardship Program on the Incidence of Carbapenem Resistant Gram-Negative Bacilli: An Interrupted Time-Series Analysis.

Antibiotics (Basel) 2021 May 16;10(5). Epub 2021 May 16.

Infectious Diseases Unit, Reina Sofia University Hospital, Maimonides, Biomedical Research Institute of Cordoba (IMIBIC), University of Cordoba (UCO), 14004 Cordoba, Spain.

Carbapenem-resistant Gram-negative bacilli (CR-GNB) are a critical public health threat, and carbapenem use contributes to their spread. Antimicrobial stewardship programs (ASPs) have proven successful in reducing antimicrobial use. However, evidence on the impact of carbapenem resistance remains unclear. Read More

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J Pharmacol Exp Ther 2021 May 14. Epub 2021 May 14.

Cellular & Integrative Physiology, University of Texas Health at San Antonio, United States

Opioid overdose intervention by naloxone, a high affinity receptor antagonist, reverses opioid-induced respiratory depression (OIRD) and analgesia by displacing opioids. Systemic naloxone stimulates release of the hypothalamic neuropeptide oxytocin, which has analgesic properties and participates in cardiorespiratory homeostasis. To test the hypothesis that oxytocin can reverse OIRD, we assessed the rescue potential of graded doses (0, 0. Read More

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Putting ATM to BED: How Adipose Tissue Macrophages Are Affected by Bariatric Surgery, Exercise, and Dietary Fatty Acids.

Adv Nutr 2021 May 12. Epub 2021 May 12.

Department of Health, Kinesiology, and Applied Physiology, Concordia University, Montreal, Quebec, Canada.

With increasing adiposity in obesity, adipose tissue macrophages contribute to adipose tissue malfunction and increased circulating proinflammatory cytokines. The chronic low-grade inflammation that occurs in obesity ultimately gives rise to a state of metainflammation that increases the risk of metabolic disease. To date, only lifestyle and surgical interventions have been shown to be somewhat effective at reversing the negative consequences of obesity and restoring adipose tissue homeostasis. Read More

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Advances in Therapy for Hormone Receptor (HR)-Positive, Human Epidermal Growth Factor Receptor 2 (HER2)-Negative Advanced Breast Cancer Patients Who Have Experienced Progression After Treatment with CDK4/6 Inhibitors.

Authors:
Chao Li Xujun Li

Onco Targets Ther 2021 3;14:2929-2939. Epub 2021 May 3.

Department of Breast Surgery, Hwa Mei Hospital, University of Chinese Academy of Sciences, Ningbo, Zhejiang, 315000, People's Republic of China.

Approximately 70% of breast cancer (BC) cases are hormone receptor-positive (HR+) and human epidermal growth factor receptor 2-negative (HER2-) BC. Cyclin-dependent kinase 4 and 6 (CDK4/6) inhibitors have acted as star drugs for reversing endocrine therapy (ET) resistance and improving the prognosis of patients with HR+ advanced breast cancer (ABC) since they were initially approved. However, progression eventually occurs. Read More

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Comparison of nanoparticle-selenium, selenium-enriched yeast and sodium selenite on the alleviation of cadmium-induced inflammation via NF-kB/IκB pathway in heart.

Sci Total Environ 2021 Jun 28;773:145442. Epub 2021 Jan 28.

College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, PR China; Key Laboratory of the Provincial Education Department of Heilongjiang for Common Animal Disease Prevention and Treatment, Northeast Agricultural University, Harbin 150030, PR China; Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, Northeast Agricultural University, Harbin 150030, PR China. Electronic address:

Cadmium (Cd) has been confirmed as an environmental contaminant, which potential threats health impacts to humans and animals. Selenium (Se) as a beneficial element that alleviates the negative effects of Cd toxicity. Se mainly exists in two forms in food nutrients including organic Se usually as (Se-enriched yeast (SeY)) and inorganic Se (sodium selenite (SSe)). Read More

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Possible Sarcopenia and Impact of Dual-Task Exercise on Gait Speed, Handgrip Strength, Falls, and Perceived Health.

Front Med (Lausanne) 2021 16;8:660463. Epub 2021 Apr 16.

Division of Geriatric Medicine, Saint Louis University School of Medicine, St. Louis, MO, United States.

Sarcopenia is defined as a progressive age-related loss in muscle mass and strength affecting physical performance. It is associated with many negative outcomes including falls, disability, cognitive decline, and mortality. Protein enriched diet and resistance training have shown to improve muscle strength and function but there is limited evidence on impact of dual-task exercise in possible sarcopenia. Read More

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Effects of omecamtiv mecarbil on failing human ventricular trabeculae and interaction with (-)-noradrenaline.

Pharmacol Res Perspect 2021 May;9(3):e00760

Heart Lung Institute, The Prince Charles Hospital, Chermside, QLD, Australia.

Omecamtiv mecarbil (OM) is a novel medicine for systolic heart failure, targeting myosin to enhance cardiomyocyte performance. To assist translation to clinical practice we investigated OMs effect on explanted human failing hearts, specifically; contractile dynamics, interaction with the β -adrenoceptor (AR) agonist (-)-noradrenaline and spontaneous contractions. Left and right ventricular trabeculae from 13 explanted failing hearts, and trabeculae from 58 right atrial appendages of non-failing hearts, were incubated with or without a single concentration of OM for 120 min. Read More

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Challenging Cosmetic Innovation: The Skin Microbiota and Probiotics Protect the Skin from UV-Induced Damage.

Microorganisms 2021 Apr 27;9(5). Epub 2021 Apr 27.

BASF Beauty Care Solutions France SAS, 69007 Lyon, France.

Many studies performed in the last decade have focused on the cutaneous microbiota. It has been shown that this microbiota plays a key role in skin homeostasis. Considered as "a second barrier" to the environment, it is very important to know how it reacts to exogenous aggressions. Read More

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Mechanical countermeasures to headward fluid shifts.

J Appl Physiol (1985) 2021 06 15;130(6):1766-1777. Epub 2021 Apr 15.

NASA Johnson Space Center, Houston, Texas.

Head-to-foot gravitationally induced hydrostatic pressure gradients in the upright posture on Earth are absent in weightlessness. This results in a relative headward fluid shift in the vascular and cerebrospinal fluid compartments and may underlie multiple physiological consequences of spaceflight, including the spaceflight-associated neuro-ocular syndrome. Here, we tested three mechanical countermeasures [lower body negative pressure (LBNP), venoconstrictive thigh cuffs (VTC), and impedance threshold device (ITD) resistive inspiratory breathing] individually and in combination to reduce a posture-induced headward fluid shift as a ground-based spaceflight analog. Read More

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Quercetin and Its Nano-Scale Delivery Systems in Prostate Cancer Therapy: Paving the Way for Cancer Elimination and Reversing Chemoresistance.

Cancers (Basel) 2021 Mar 31;13(7). Epub 2021 Mar 31.

Department of Pharmacy, University of Naples Federico II, Via Domenico Montesano 49, 80131 Naples, Italy.

Prostate cancer is the second most leading and prevalent malignancy around the world, following lung cancer. Prostate cancer is characterized by the uncontrolled growth of cells in the prostate gland. Prostate cancer morbidity and mortality have grown drastically, and intensive prostate cancer care is unlikely to produce adequate outcomes. Read More

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Payments for Conservation of Animal Genetic Resources in Agriculture: One Size Fits All?

Animals (Basel) 2021 Mar 17;11(3). Epub 2021 Mar 17.

Biotechnical Faculty, University of Ljubljana, Groblje 3, 1230 Domzale, Slovenia.

Local livestock breeds in Slovenia have been eligible for financial incentives in the form of a fixed payment per livestock unit (LU) since 2002. The scheme has however not been successful in reversing the erosion of animal genetic resources (AnGR). This paper investigates an alternative, whereby incentive payments would better reflect breeders' actual opportunity costs. Read More

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Shilnikov attractors in three-dimensional orientation-reversing maps.

Chaos 2021 Jan;31(1):011102

National Research University Higher School of Economics, 25/12 Bolshaya Pecherskaya Ulitsa, 603155 Nizhny Novgorod, Russia.

A Shilnikov homoclinic attractor of a three-dimensional diffeomorphism contains a saddle-focus fixed point with a two-dimensional unstable invariant manifold and homoclinic orbits to this saddle-focus. The orientation-reversing property of the diffeomorphism implies a symmetry between two branches of the one-dimensional stable manifold. This symmetry leads to a significant difference between Shilnikov attractors in the orientation-reversing and orientation-preserving cases. Read More

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January 2021

CCN5 activation by free or encapsulated EGCG is required to render triple-negative breast cancer cell viability and tumor progression.

Pharmacol Res Perspect 2021 04;9(2):e00753

Cancer Research Unit, VA Medical Center, Kansas City, MO, USA.

Epigallocatechin-3-gallate (EGCG) has been considered an anticancer agent despite conflicting and discrepant bioavailability views. EGCG impairs the viability and self-renewal capacity of triple-negative breast cancer (TNBC) cells and makes them sensitive to estrogen via activating ER-α. Surprisingly, the mechanism of EGCG's action on TNBC cells remains unclear. Read More

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PNSA, a Novel C-Terminal Inhibitor of HSP90, Reverses Epithelial-Mesenchymal Transition and Suppresses Metastasis of Breast Cancer Cells In Vitro.

Mar Drugs 2021 Feb 20;19(2). Epub 2021 Feb 20.

Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China.

Metastasis accounts for the vast majority of deaths in breast cancer, and novel and effective treatments to inhibit cancer metastasis remain urgently developed. The expression level of heat shock protein 90 (HSP90) in invasive breast cancer tissue is higher than in adjacent non-cancerous tissue. In the present study, we investigated the inhibitory effect of penisuloxazin A (PNSA), a novel C- terminal inhibitor of HSP90, on metastasis of breast cancer cells and related mechanism in vitro. Read More

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February 2021

Molecular Insights into an Antibiotic Enhancer Action of New Morpholine-Containing 5-Arylideneimidazolones in the Fight against MDR Bacteria.

Int J Mol Sci 2021 Feb 19;22(4). Epub 2021 Feb 19.

Department of Technology and Biotechnology of Drugs, Jagiellonian University, Medical College, ul. Medyczna 9, 30-688 Krakow, Poland.

In the search for an effective strategy to overcome antimicrobial resistance, a series of new morpholine-containing 5-arylideneimidazolones differing within either the amine moiety or at position five of imidazolones was explored as potential antibiotic adjuvants against Gram-positive and Gram-negative bacteria. Compounds (-) were tested for oxacillin adjuvant properties in the Methicillin-susceptible (MSSA) strain ATCC 25923 and Methicillin-resistant MRSA 19449. Compounds - were tested additionally in combination with various antibiotics. Read More

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February 2021

A paclitaxel and microRNA-124 coloaded stepped cleavable nanosystem against triple negative breast cancer.

J Nanobiotechnology 2021 Feb 25;19(1):55. Epub 2021 Feb 25.

State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200032, China.

Background: Triple negative breast cancer (TNBC) is one of the most biologically aggressive breast cancers and lacks effective treatment options, resulting in a poor prognosis. Therefore, studies aiming to explore new therapeutic strategies for advanced TNBC are urgently needed. According to recent studies, microRNA-124 (miR124) not only inhibits tumour growth but also increases the sensitivity of TNBC to paclitaxel (PTX), suggesting that a platform combining PTX and miR124 may be an advanced solution for TNBC. Read More

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February 2021