The role of honey in the ecology of the hive: Nutrition, detoxification, longevity, and protection against hive pathogens.

Honey is the source of energy for the European honey bee, Apis mellifera. Beyond simple nutrition and a hedge against the seasonal, geographic, and chemical unpredictability of nectar, honey has properties that protect the hive against various stresses. Enzyme-mediated detoxification during honey ripening neutralizes potentially toxic phytochemicals, and bees that consume honey have enhanced tolerance to other ingested toxins. Catalase and antioxidant phenolics protect honey bees from oxidative damage caused by reactive oxygen species, promoting their longevity. Phytochemical components of honey and microRNAs have the potential to influence developmental pathways, with diet playing a large role in honey bee caste determination. Components of honey mediate stress response and promote cold tolerance during overwintering. Honey has a suite of antimicrobial mechanisms including osmotic pressure, low water activity, low pH, hydrogen peroxide, and plant-, honey bee-, and microbiota-derived compounds such as phytochemicals and antimicrobial peptides. Certain types of honey, particularly polyfloral honeys, have been shown to inhibit important honey bee pathogens including the bacteria responsible for American and European Foulbrood, the microsporidian Nosema ceranae, and the fungi responsible for Stonebrood. Understanding the diverse functional properties of honey has far-ranging implications for honey bee and hive health and management by beekeepers.

The Potential of Honey as a Prebiotic Food to Re-engineer the Gut Microbiome Toward a Healthy State.

Honey has a long history of use for the treatment of digestive ailments. Certain honey types have well-established bioactive properties including antibacterial and anti-inflammatory activities. In addition, honey contains non-digestible carbohydrates in the form of oligosaccharides, and there is increasing evidence from in vitro, animal, and pilot human studies that some kinds of honey have prebiotic activity. Prebiotics are foods or compounds, such as non-digestible carbohydrates, that are used to promote specific, favorable changes in the composition and function of the gut microbiota. The gut microbiota plays a critical role in human health and well-being, with disturbances to the balance of these organisms linked to gut inflammation and the development and progression of numerous conditions, such as colon cancer, irritable bowel syndrome, obesity, and mental health issues. Consequently, there is increasing interest in manipulating the gut microbiota to a more favorable balance as a way of improving health by dietary means. Current research suggests that certain kinds of honey can reduce the presence of infection-causing bacteria in the gut including Salmonella, Escherichia coli, and Clostridiodes difficile, while simultaneously stimulating the growth of potentially beneficial species, such as Lactobacillus and Bifidobacteria. In this paper, we review the current and growing evidence that shows the prebiotic potential of honey to promote healthy gut function, regulate the microbial communities in the gut, and reduce infection and inflammation. We outline gaps in knowledge and explore the potential of honey as a viable option to promote or re-engineer a healthy gut microbiome.

Staff knowledge of orthostatic vital signs measurement.

PURPOSE: To determine the nursing staff's knowledge of the proper procedure for measuring orthostatic vital signs. METHODS: The Knowledge of Orthostatic Vital Signs Survey was sent via email to direct staff on 31 patient-care units in a large hospital system. RESULTS: Eighty percent of the participants were RNs and 12% were unlicensed assistants. Survey results showed that many respondents did not know how to properly size the cuff and were uncertain about the timing of measurements with position changes. Fifty-seven percent of respondents did not correctly identify abnormal findings with regard to the systolic BP, but 80% were aware of the diastolic BP drop in orthostatic hypotension. CONCLUSION: This survey identified gaps in the staff's knowledge about the proper procedure for measuring orthostatic vital signs.

Orthostatic Hypotension and Falls in Hospitalized Older Adults.

The aim of this retrospective study was to determine the prevalence of orthostatic hypotension (OH) among a convenience sample of older adults on two Acute Care of the Elderly (ACE) units of the ChristianaCare™ in Delaware. Another aim was to determine if subjects with documented OH experienced falls. Retrospective de-identified data was obtained from electronic medical records for the years 2015 to 2018. Among all patients who had valid first orthostatic vital sign (OVS) readings (n = 7,745), 39.2% had orthostatic hypotension on the first reading. Among the patients, 42.8% were found to be hypotensive during OVS. Thirty-one (0.9%) of those with OH fell at some point during their stay. The odds ratio for falls in the presence of OH was 1.34 with a 95% confidence interval (0.82, 2.21), but a chi-square test failed to find significance (p = .2494). The results could not determine if OVS should be mandatory in fall prevention protocols.

Maternal experiences of caring for a child with a ventricular assist device.

The purpose of this study was to gain a deeper understanding of maternal experiences of caring for their child with a VAD at home as a bridge to transplant. A descriptive, qualitative study was conducted via telephone-recorded guided interviews. Participants were caring for or had a child with a VAD between 4 and 16 years old. Data collection occurred over a 12-month period. Using the snowball sampling technique, a purposeful sample of mothers (n = 6) was consented and completed the interview. The data were analyzed using an iterative process of thematic analysis. Five themes emerged: physical modifications, the loss of independence, the emotional rollercoaster, support from others, and transitions on and off the device. We introduced new evidence about sleep, contraception, and heart transplantation, and how VAD therapy impacts childhood development. The mean duration of VAD support was 263 ± 170 days. Five children had heart transplants by the time of interview. To the best of our knowledge, this is the first qualitative study in the US that explores maternal experiences of caring for a child who is living at home with a VAD. VAD therapy is a novel approach to managing advanced heart failure among children and presents unique challenges when caring for them at home. Results provide insight into the education, physical environment, and support needed by parents.

Risk-Taking Behaviors in Adolescents With Chronic Cardiac Conditions: A Scoping Review.

PROBLEM: Advances in treatment and therapy for children with chronic cardiac conditions have extended their life expectancy. Risk-taking behavior among adolescents requires further exploration. Researchers conducted a scoping review to address a literature gap specific to risk-taking behavior among adolescents with chronic cardiac conditions. ELIGIBILITY CRITERIA: Sources were limited to (1) human subjects, (2) English language or translatable to English, (3) adolescents without age restrictions, (4) all research designs and (5) presence of a chronic cardiac condition. SAMPLE: Searches of six electronic databases (CINAHL Plus Full Text, PubMed, Web of Knowledge, Scopus, ProQuest and Grey Literature Report) were conducted to verify the empirical literature between 1975 and 2018. Seventeen sources were included in this review. RESULTS: Among the 17 sources, 12 sources examined risk-taking behavior by self-report among adolescents with chronic cardiac conditions. Tobacco, alcohol and/or other drug use and physical inactivity were the most prevalent risk-taking behaviors identified through this review. CONCLUSIONS: Findings from this scoping review describe the types of risk-taking behaviors that adolescents with chronic cardiac conditions are engaging in, highlight similarities when compared to other types of chronic conditions, and serve as a foundation for future research among this population. IMPLICATIONS: Discussion of risk-taking behaviors should be integrated into each healthcare encounter beginning in early adolescence and continuing through transition to adulthood and adult health care. Qualitative research studies may serve as an effective method by which to explore risk-taking behavior among adolescents with chronic cardiac conditions in greater detail.

Development of a Clinical Competency Checklist for Care of Patients Experiencing Substance Withdrawal Delirium or Delirium: Use of a Delphi Technique and Expert Panel.

Health care providers are challenged by the presentation and management of inpatients experiencing substance withdrawal delirium (SWD) and delirium. The current Delphi study used an expert panel to develop a clinical competency checklist for nurse and physician educator use in teaching health care providers about the initial care of patients with SWD or delirium. The checklist includes categories of patient safety, history and information gathering, physical examination and assessment, treatment plan, and patient/family-centered care.

Comparison of arm and calf automatic noninvasive blood pressures in pediatric intensive care patients.

The purpose of this study was to compare upper arm and calf automatic blood pressures (BPs) in a convenience sample of 221 children, ages 1 to 8 years, admitted to a pediatric intensive care unit of a 180-bed teaching hospital in the Mid-Atlantic region of the United States. Subjects were positioned in bed, with the head of bed elevated 30° and extremities resting on the bed. BP cuff size was based on arm and calf circumferences. BPs were measured simultaneously using bedside and portable Spacelabs monitors. Calf BPs were greater than arm BPs in approximately 73% of the sample. Paired t tests show statistically significant differences for systolic BPs and mean arterial pressures. Influence of demographics, agitation levels, medical diagnoses, and current medications was explored. Calf and arm BPs were not interchangeable in acutely ill children, ages 1 to 8 years.

Forearm and upper-arm oscillometric blood pressure comparison in acutely ill adults.

When patients' upper arms are not accessible and/or when cuffs do not fit large upper arms, the forearm site is often used for blood pressure (BP) measurement. The purpose of this study is to compare forearm and upper-arm BPs in 70 acutely ill adults, admitted to a community hospital's 14-bed ICU. Using Philips oscillometric monitors, three repeated measures of forearm and upper-arm BPs are obtained with head of bed flat and with head of bed elevated at 30 degrees. Arms are resting on the bed. Paired t tests show statistically significant differences in systolic BPs, diastolic BPs, and mean arterial pressures in the supine and head-elevated positions. Bland-Altman analyses indicate that forearm and upper-arm oscillometric BPs are not interchangeable in acutely ill adults.

Vorinostat (NSC# 701852) in patients with relapsed non-small cell lung cancer: a Wisconsin Oncology Network phase II study.

INTRODUCTION: Vorinostat is a small molecule inhibitor of histone deacetylase, and has shown preclinical activity in non-small cell lung cancer (NSCLC). METHODS: Patients with relapsed NSCLC were eligible. Patients received oral vorinostat, 400 mg daily. The primary objective was response rate, with the goal of at least one responder in the first 14 evaluable patients, according to the two-stage minimax design. Secondary objectives included time to progression (TTP), overall survival (OS), and safety. RESULTS: Sixteen patients enrolled from January 2006 to April 2007. The median age was 59.5 years. Thirteen patients were female. Two patients were not evaluable for response due to progressive disease within Cycle 1. No objective antitumor responses were seen in the 14 evaluable patients. Eight patients experienced stable disease (median 3.7 months, range 1.4-19.4). Median TTP was 2.3 months (range 0.9-19.4 months), median OS was 7.1 months (range 1.4-30.0+ months), and estimated 1 year OS rate was 19% (SE 10%). One patient died on study from an acute ischemic stroke; this event was deemed possibly related to treatment. Grade 3/4 adverse events possibly related to vorinostat included neutropenia, lymphopenia, fatigue, pulmonary embolus/deep vein thrombosis, dehydration, elevated alkaline phosphatase, and hypokalemia. CONCLUSIONS: No objective antitumor activity was detected with single agent vorinostat in this setting; however, it yields TTP in relapsed NSCLC similar to that of other targeted agents. Further studies in NSCLC should focus on combining vorinostat with other antitumor agents.

In vitro and clinical investigation of the relationship between CCR5 receptor occupancy and anti-HIV activity of Aplaviroc.

Aplaviroc (GW873140) binds specifically to human cellular CC chemokine receptor 5 (CCR5) and demonstrates potent anti-human immunodeficiency virus activity in vitro in the subnanomolar range. In vitro studies show that aplaviroc selectively inhibits the binding of a particular monoclonal antibody, 45531, to CCR5. Based on this observation, a flow cytometry-based assay was developed to determine percentage CCR5 receptor occupancy (RO). CCR5 receptor occupancy was aplaviroc concentration-dependent and related to anti-human immunodeficiency virus activity in vitro. In the clinical setting, CCR5 receptor occupancy in peripheral blood was >98% in all subjects within 2 to 3 hours of dosing, which is consistent with the peak plasma concentrations of drug. Longitudinal analysis in the drug washout period revealed the time to 50% CCR5 receptor occupancy averaged >100 hours, in both human immunodeficiency virus-positive and human immunodeficiency virus-negative subjects, substantially longer than the plasma pharmacokinetic half-life of 3 hours. The duration of CCR5 receptor occupancy appeared to be dose-dependent and associated with antiviral activity as measured by plasma human immunodeficiency virus RNA nadir following 10 days of multiple dose administration. These data demonstrate that the analysis of CCR5 receptor occupancy, in addition to conventional plasma-based pharmacokinetic measures, provides an informative tool to assist in evaluating the pharmacodynamic and antiviral effects of cellular CC chemokine receptor antagonists.

Altered cytokine levels in the blood and cerebrospinal fluid of chronic pain patients.

This study replicates and extends prior reports of abnormal cytokine levels in chronic pain patients and has correlated the alterations with pain severity. In addition, there appeared to be a need to directly assess cerebrospinal fluid (CSF) because previous findings on cytokine concentrations in peripheral circulation have been inconsistent. CSF and blood specimens were obtained from 14 patients with distal painful non-diabetic polyneuropathy (DPPN) or post-traumatic neuralgia (PTN). Elevated receptor levels for Tumor Necrosis Factor (sTNFr) were the most distinctive abnormality along with low interleukin-10 (IL-10). sTNFr in CSF and blood, and IL-1ss in CSF, were positively associated with pain intensity, whereas IL-10 in both compartments was inversely correlated with pain symptoms. An imbalance of pro- and anti-inflammatory cytokines appears to be a clinically relevant feature, which may contribute to the maintenance of chronic pain.

Symbiosis--undergraduate research mentoring and faculty scholarship in nursing.

Although teaching is the major focus of academia, research and professional publications frequently determine faculty eligibility for promotion and tenure. In universities where funded research is scarce, faculty need creative means to accomplish research goals. Research is an essential part of baccalaureate nursing education. The goal of research education at the baccalaureate level is to prepare knowledgeable consumers in nursing research. The purpose of this article is to describe an undergraduate nursing research course that provide students with hands-on experience in the conduct of nursing research and provide faculty with assistance in moving their research agenda forward. Faculty members were solicited to work with 5-10 students in a research project that was either in the planning stages or actively in progress. After one year of program implementation, faculty and students were involved in presenting poster and oral presentations at state, regional, and international research conferences. Manuscripts and proposals for funding are in the process of submission.

The effects of anatomical structures on adult forearm and upper arm noninvasive blood pressures.

OBJECTIVE: The purpose of this study was to determine the effects of anatomical structures, specifically limb subcutaneous tissue and vessels on differences between forearm and upper arm oscillometric noninvasive blood pressure measurements. METHODS: Nineteen volunteers with a mean age of 21.7+/-3.7 years and without peripheral vascular disease or coronary artery disease participated. Circumference and skinfolds were measured for the upper arm and forearm. Body mass indices were calculated. Ultrasound measured vessel depth and diameter in the upper arm and forearm. Dual energy X-ray absorptiometry determined percentage of subcutaneous tissue in the arm. With participants seated, American Heart Association guidelines were used to measure blood pressures, first by auscultatory method (upper arm only) and then by oscillometric method (upper arm and forearm) with a Dinamap 100 oscillometric blood pressure monitor. RESULTS: Statistically significant differences were seen between upper arm auscultatory and oscillometric systolic blood pressures (t=-4.88; P=0.000) and mean arterial pressures (t=-3.07; P=0.007). Differences between oscillometric forearm and upper arm blood pressure readings were statistically significant for mean arterial pressures (t=-2.39; P=0.028). A regression model suggested that forearm and upper arm vessel depth, forearm vessel diameter, and upper arm circumference explained a statistically significant portion of the difference between forearm and upper arm blood pressures. CONCLUSIONS: Differences between forearm and upper arm oscillometric blood pressures can be partially explained by vessel size, depth and upper arm circumference.

A Delphi study of innovative teaching in baccalaureate nursing education.

The purpose of this Delphi study was to describe the process of innovative teaching in the baccalaureate nursing classroom, based on the consensus of expert nurse educators (n = 28). Round 1 involved a semi-structured survey that required participants to identify essential components of, facilitators of, and barriers to innovative teaching. Content analysis of the responses was used to construct the 62-item Round 2 survey in which participants ranked the importance of each item using a 7-point, Likert-type scale. The Round 3 survey included the same items and provided the median scores of the participants' own and other experts' responses. The highest-ranked essential components were faculty open, seeking new ideas; faculty motivation, commitment, and enthusiasm; and open and effective student-faculty communication. The highest-ranked facilitators were effective communication with students, faculty motivation and enthusiasm for change, and faculty satisfaction with innovative teaching. Faculty attitudes, fears, and lack of knowledge of innovative teaching were the highest-ranked barriers to innovative teaching in the nursing classroom.

Human P2X7 pore function predicts allele linkage disequilibrium.

BACKGROUND: Innate immune response amplification is achieved by leukocyte expression of the purinergic nucleotide receptor P2X7, an extracellular nucleotide-gated pore. Previously, low P2X7 pore activity in whole blood was associated with loss-of-function genotypes in correlation with a decreased ratio of lipopolysaccharide-stimulated tumor necrosis factor-alpha to interleukin-10, of relevance to a variety of infectious and inflammatory disorders. We hypothesized that evaluation of participants with discordance between the P2X7 genotype and pore status would disclose additional alleles, linkage disequilibrium, and novel functional correlates of genotype to phenotype. METHODS: Comparison of whole-blood pore results with restriction fragment length polymorphism data for known loss-of-function genotypes from 200 healthy participants optimized the diagnostic threshold for low pore activity by ROC curve analysis. We identified novel alleles and inferred haplotypes by sequencing outlier genomic templates and by linkage analysis. RESULTS: With a refined threshold of low activity, a normal pore result had only a 2% probability of association with known loss-of-function variants. By contrast, the positive predictive value of low pore activity was 59% for identifying known alleles. DNA samples from this discordant group contained 28 P2X7 sequence variations. Linkage analysis demonstrated that A1513C, T1729A, and G946A are inherited independently from one another, although these loss-of-function variants are in disequilibrium with other alleles. When we segregated pore activity data according to genotypes, nonsynonymous sequence variations (G474A and A1405G) appeared to exhibit modulatory effects on P2X7 pore activity. CONCLUSIONS: Direct analysis of pore activity demonstrates functional interactions between P2X7 alleles. The performance characteristics of the whole-blood pore assay enables correlation of genomic variation with concomitant investigation of functional performance in clinical studies.

Cell sorting but not serum starvation is effective for SV40 human corneal epithelial cell cycle synchronization.

SV40 human corneal epithelial cell (HCEC) populations are readily used as a substitute for primary corneal epithelial cells that are difficult to maintain in vitro. To initiate cell-cycle experiments with the SV40-HCEC cells, two separate methods of cell synchronization were compared including serum starvation and sterile cell sorting. We hypothesized that SV40 cells are synchronized at higher efficiencies into each cell cycle phase (G1, S, G2M) when cell sorting is performed when compared to alternative methods of synchronization. SV40 cells were synchronized by deprivation of serum over 96 h or labeled with Höechst 33342 dye and sorted based on DNA content. Cells were synchronized using both methods and harvested at time points up to 72 h after release. To define more precisely the nature of sorted fractions, cells were pulsed with BrdU prior to sorting. SV40-HCEC cells exhibit a well-defined cell cycle profile. Serum deprivation up to 96 h was ineffective for cell synchronization of SV40-HCECs. In comparison, we achieved efficient synchronization of the SV40-HCECs with sterile cell sorting. SV40-HCEC cells gated into G1, S and G2M were synchronized up to 85% following the sort and maintained synchronization up to 24 h. Our findings indicate that serum starvation is not effective for synchronization of the SV40-HCEC cell line. We present a more effective approach, the use of cell sorting for cell synchronization of the SV40-HCEC cells.

Clinical comparison of automatic, noninvasive measurements of blood pressure in the forearm and upper arm with the patient supine or with the head of the bed raised 45 degrees: a follow-up study.

BACKGROUND: Noninvasive measurement of blood pressure in the forearm is used when the upper arm is inaccessible and/or when available blood pressure cuffs do not fit a patient's arm. Evidence supporting this practice is limited. OBJECTIVE: To compare noninvasive measurements of blood pressure in the forearm and upper arm of medical-surgical inpatients positioned supine and with the head of the bed raised 45 degrees . METHODS: Cuff size was selected on the basis of forearm and upper arm circumference and manufacturers' recommendations. With a Welch Allyn Vital Signs 420 Series monitor, blood pressures were measured in the forearm and then in the upper arm of 221 supine patients with their arms resting at their sides. Patients were repositioned with the head of the bed elevated 45 degrees and after 2 minutes, blood pressures were measured in the upper arm and then the forearm. Starting position was alternated on subsequent subjects. RESULTS: Paired t tests revealed significant differences between systolic and diastolic blood pressures measured in the upper arm and forearm with patients supine and with the head of the bed elevated 45 degrees . The Bland-Altman procedure revealed that the distances between the mean values and the limits of agreement were from 15 to 33 mm Hg for individual subjects. CONCLUSIONS: Noninvasive measurements of blood pressure in the forearm and upper arm cannot be interchanged in medical-surgical patients who are supine or in patients with the head of the bed elevated 45 degrees .

Clinical comparison of automatic, noninvasive measurements of blood pressure in the forearm and upper arm.

BACKGROUND: When the upper arm (area from shoulder to elbow) is inaccessible and/or a standard-sized blood pressure cuff does not fit, some healthcare workers use the forearm to measure blood pressure. OBJECTIVE: To compare automatic noninvasive measurements of blood pressure in the upper arm and forearm. METHODS: A descriptive, correlational comparison study was conducted in the emergency department of a 1071-bed teaching hospital. Subjects were 204 English-speaking patients 6 to 91 years old in medically stable condition who had entered the department on foot or by wheelchair and who had no exclusions to using their left upper extremity. A Welch Allyn Vital Signs 420 series monitor was used to measure blood pressure in the left upper arm and forearm with the subject seated and the upper arm or forearm at heart level. RESULTS: Pearson r correlation coefficients between measurements in the upper arm and forearm were 0.88 for systolic blood pressure and 0.76 for diastolic blood pressure (P < .001 for both). Mean systolic pressures, but not mean diastolic pressures, in the upper arm and forearm differed significantly (t = 2.07, P = .04). A Bland-Altman analysis indicated that the distances between the mean values and the limits of agreement for the 2 sites ranged from 15 mm Hg (mean arterial pressure) to 18.4 mm Hg (systolic pressure). CONCLUSIONS: Despite strict attention to correct cuff size and placement of the upper arm or forearm at heart level, measurements of blood pressure obtained noninvasively in the arm and forearm of seated patients in stable condition are not interchangeable.