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Hurst RD, Lyall KA, Wells RW, Sawyer GM, Lomiwes D, Ngametua N, Hurst SM. Daily Consumption of an Anthocyanin-Rich Extract Made From New Zealand Blackcurrants for 5 Weeks Supports Exercise Recovery Through the Management of Oxidative Stress and Inflammation: A Randomized Placebo Controlled Pilot Study. Front Nutr 2020; 7:16. [PMID: 32175326 PMCID: PMC7056812 DOI: 10.3389/fnut.2020.00016] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2019] [Accepted: 02/11/2020] [Indexed: 12/11/2022] Open
Abstract
Background: Regular exercise is essential to a healthy lifestyle but evokes an oxidative and inflammatory stress. Depending upon its intensity and duration this can result in either beneficial adaptive changes or underlying tissue damage that impacts upon long-term health and individual sporting training schedules. Functional foods containing plant bioactives have potential to support exercise through management of the detrimental aspects of exercise and complement ergonomic adaptive benefits. Aim: Previously we reported that a single consumption of a 3.2 mg/kg New Zealand blackcurrant anthocyanin-rich extract (BAE) 1 h before a 30 min rowing exercise attenuated moderate exercise-mediated oxidative stress and supported innate immunity. Here we evaluate whether the efficacy of a single consumption of BAE 1 h prior to exercise is changed after extended daily BAE consumption for 5 weeks. Results: On week 1, a single consumption of BAE 1 h before a 30 min row mediated a significant (p < 0.05) 46% reduction in post-exercise-induced malondialdehyde (MDA) by 2 h compared to a 30% reduction in the placebo group. Similar efficacy was observed 5 weeks later after daily consumption of BAE. In addition, daily BAE consumption for 5 weeks improved the efficacy to (a) resolve acute inflammation, and (b) increased plasma IL-10, salivary beta-defensin 2 (BD2) and secretory IgA. Although no change in plasma antioxidant capacity was detected, a significant (p < 0.009) positive correlation between plasma IL-10 and plasma antioxidant capacity (R 2 = 0.35) was observed on week 6 after 5 week BAE consumption suggesting IL-10 influences antioxidant properties. Using a differentiated myotubule cell-line revealed that whilst IL-10 had no direct antioxidant neutralizing action, longer-term exposure (24 h) attenuated 2,2'-Azobis(2-amidinopropane) dihydrochloride (AAPH)-induced myotubule oxidative stress, supporting a putative role for IL-10 in the modulation of cellular antioxidant systems. Conclusions: Daily consumption of BAE for 5 weeks serves to enhance the exercise recovery effectiveness of a single consumption of BAE and promotes beneficial/protective antioxidant/anti-inflammatory cellular events that facilitate exercise recovery.
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Affiliation(s)
- Roger D. Hurst
- Food Innovation Portfolio, The New Zealand Institute for Plant & Food Research Ltd., Palmerston North, New Zealand
| | - Kirsty A. Lyall
- Food Innovation Portfolio, The New Zealand Institute for Plant & Food Research Ltd., Hamilton, New Zealand
| | - Robyn W. Wells
- Food Innovation Portfolio, The New Zealand Institute for Plant & Food Research Ltd., Hamilton, New Zealand
| | - Gregory M. Sawyer
- Food Innovation Portfolio, The New Zealand Institute for Plant & Food Research Ltd., Palmerston North, New Zealand
| | - Dominic Lomiwes
- Food Innovation Portfolio, The New Zealand Institute for Plant & Food Research Ltd., Palmerston North, New Zealand
| | - Nayer Ngametua
- Food Innovation Portfolio, The New Zealand Institute for Plant & Food Research Ltd., Palmerston North, New Zealand
| | - Suzanne M. Hurst
- Food Innovation Portfolio, The New Zealand Institute for Plant & Food Research Ltd., Palmerston North, New Zealand
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Hurst RD, Lyall KA, Roberts JM, Perthaner A, Wells RW, Cooney JM, Jensen DJ, Burr NS, Hurst SM. Consumption of an Anthocyanin-Rich Extract Made From New Zealand Blackcurrants Prior to Exercise May Assist Recovery From Oxidative Stress and Maintains Circulating Neutrophil Function: A Pilot Study. Front Nutr 2019; 6:73. [PMID: 31192216 PMCID: PMC6548855 DOI: 10.3389/fnut.2019.00073] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Accepted: 05/01/2019] [Indexed: 12/21/2022] Open
Abstract
Aim: To evaluate blackcurrant anthocyanin-rich extract (BAE) consumption on time- and dose-dependent plasma anthocyanin bioavailability and conduct a pilot study to explore the potential effect of BAE in promoting recovery from exercise-induced oxidative stress, and maintenance of circulating neutrophil function. Methods: Time- and dose-dependent blackcurrant anthocyanin bioavailability was assessed using LC-MS in 12 participants over 6 h after the ingestion of a placebo or BAE containing 0.8, 1.6, or 3.2 mg/kg total anthocyanins. In a separate pilot intervention exercise trial, 32 participants consumed either a placebo or 0.8, 1.6, or 3.2 mg/kg BAE (8 individuals per group), and then 1 h later performed a 30 min row at 70% VO2max. Blood was collected during the trial for oxidative, antioxidant, inflammatory, and circulating neutrophil status. Results: Consumption of BAE caused a time- and dose-dependent increase in plasma anthocyanins, peaking at 2 h after ingestion of 3.2 mg/kg BAE (217 ± 69 nM). BAE consumed 1 h prior to a 30 min row had no effect on plasma antioxidant status but hastened the recovery from exercise-induced oxidative stress: By 2 h recovery, consumption of 1.6 mg/kg BAE prior to exercise caused a significant (P < 0.05) 34 and 32% decrease in post-exercise plasma oxidative capacity and protein carbonyl levels, respectively, compared to placebo. BAE consumption prior to exercise dose-dependently attenuated a small, yet significant (P < 0.01) transient 13 ± 2% decline in circulating neutrophils observed in the placebo group immediately post-exercise. Furthermore, the timed consumption of either 1.6 or 3.2 mg/kg BAE attenuated a 17 ± 2.4% (P < 0.05) decline in neutrophil phagocytic capability of opsonised FITC-Escherichia coli observed 6 h post-exercise in the placebo group. Similarly, a dose-dependent increase in neutrophil surface expression of complement receptor-3 complex (CR3, critical for effective phagocytosis of opsonised microbes), was observed 6 h post-exercise in both 1.6 and 3.2 mg/kg BAE intervention groups. Conclusions: Consumption of BAE (>1.6 mg/kg) 1 h prior to exercise facilitated recovery from exercise-induced oxidative stress and preserved circulating neutrophil function. This study provides data to underpin a larger study designed to evaluate the efficacy of timed BAE consumption on post-exercise recovery and innate immunity.
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Affiliation(s)
- Roger D Hurst
- The New Zealand Institute for Plant and Food Research Ltd., Palmerston North, New Zealand
| | - Kirsty A Lyall
- The New Zealand Institute for Plant and Food Research Ltd., Hamilton, New Zealand
| | - Joanna M Roberts
- AgResearch Ltd., The Hopkirk Research Institute, Palmerston North, New Zealand
| | - Anton Perthaner
- AgResearch Ltd., The Hopkirk Research Institute, Palmerston North, New Zealand
| | - Robyn W Wells
- The New Zealand Institute for Plant and Food Research Ltd., Hamilton, New Zealand
| | - Janine M Cooney
- The New Zealand Institute for Plant and Food Research Ltd., Hamilton, New Zealand
| | - Dwayne J Jensen
- The New Zealand Institute for Plant and Food Research Ltd., Hamilton, New Zealand
| | - Natalie S Burr
- The New Zealand Institute for Plant and Food Research Ltd., Palmerston North, New Zealand
| | - Suzanne M Hurst
- The New Zealand Institute for Plant and Food Research Ltd., Palmerston North, New Zealand
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Hurst RD, Wells RW, Hurst SM, McGhie TK, Cooney JM, Jensen DJ. Blueberry fruit polyphenolics suppress oxidative stress-induced skeletal muscle cell damage in vitro. Mol Nutr Food Res 2010; 54:353-63. [PMID: 19885847 DOI: 10.1002/mnfr.200900094] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Skeletal muscle damage can result from disease and unaccustomed or excessive exercise. Muscle dysfunction occurs via an increased level of reactive oxygen species and hence there is potential in antioxidants as amelioration strategies. We explored the putative benefit of fruit polyphenolic extracts in reducing the susceptibility of skeletal muscle cells to oxidative stress. Muscle myotubes were simultaneously challenged with fruit extracts (1-50 microg/mL) and calcium ionophore (A23187), hydrogen peroxide, or 2,4-dinitrophenol and damage monitored by release of cytosolic enzymes. A blueberry fruit extract displayed a potent and significant dose-dependent protective capacity. Evaluation of the protective capacity of anthocyanin sub-extracts of blueberry fruit and pure individual glycosides, with identification of extract polyphenolic components using MS, suggested that malvidin galactoside and/or glucoside were the active compounds. These in vitro data support the concept that blueberry fruits or derived foods rich in malvidin glycosides may be beneficial in alleviating muscle damage caused by oxidative stress. More research on the benefits of blueberry fruit consumption in human intervention studies is warranted.
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Affiliation(s)
- Roger D Hurst
- Functional Food and Health Group, New Zealand Institute for Plant and Food Research Ltd., Hamilton, New Zealand.
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Liu H, Miller DV, Lourenssen S, Wells RW, Blennerhassett MG, Paterson WG. Proteinase-activated receptor-2 activation evokes oesophageal longitudinal smooth muscle contraction via a capsaicin-sensitive and neurokinin-2 receptor-dependent pathway. Neurogastroenterol Motil 2010; 22:210-6, e67. [PMID: 19740117 DOI: 10.1111/j.1365-2982.2009.01394.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
BACKGROUND Intraluminal acid evokes sustained oesophageal longitudinal smooth muscle (LSM) contraction and oesophageal shortening, which may play a role in oesophageal pain and the aetiology of hiatus hernia. In the opossum model, this reflex has been shown to involve mast cell activation and release of neurokinins from capsaicin-sensitive neurons. The aim of this study was to determine whether proteinase-activated receptor-2 (PAR-2) activation evokes reflex LSM contraction via similar mechanisms. METHODS Tension recording studies were performed using opossum oesophageal LSM strips in the presence and absence of pharmacological agents. In addition, the effect of trypsin on single isolated LSM cells was determined using videomicroscopy, and the expression of PAR-2 in oesophageal tissue was examined using immunohistochemistry. KEY RESULTS The PAR-2 agonist trypsin evoked sustained, concentration-dependent contraction of LSM muscle strips, but had no effect on isolated LSM cells. The trypsin-induced contraction was blocked by capsaicin desensitization, substance P (SP) desensitization or application of the selective neurokinin-2 (NK-2) receptor antagonist MEN 10376. Immunohistochemistry revealed co-localization of SP, calcitonin gene-related peptide and PAR-2 in axons of opossum oesophageal LSM. CONCLUSIONS & INFERENCES Longitudinal smooth muscle contraction induced by trypsin involves capsaicin-sensitive neurons and subsequent activation of NK-2, which is identical to the pathway involved in acid-induced LSM contraction and oesophageal shortening. This suggests that acid-induced LSM contraction may involve mast cell-derived mediators that activate capsaicin-sensitive neurons via PAR-2.
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Affiliation(s)
- H Liu
- Gastrointestinal Diseases Research Unit, Kingston General Hospital Queens University, Kingston, ON, Canada
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Campbell RK, Wells RW, Miller DV, Paterson WG. Role of cADPR in sodium nitroprusside-induced opossum esophageal longitudinal smooth muscle contraction. Am J Physiol Gastrointest Liver Physiol 2007; 292:G1543-8. [PMID: 17307726 DOI: 10.1152/ajpgi.00111.2006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Nitric oxide (NO) relaxes most smooth muscle, including the circular smooth muscle (CSM) of the esophagus, whereas in the adjacent longitudinal smooth muscle (LSM), it causes contraction. The second messenger pathways responsible for this NO-induced LSM contraction are unclear, given that these opposing effects of NO are both cGMP dependent. In intestinal LSM, but not CSM, cADP ribose (cADPR)-dependent pathways participate in Ca(2+) mobilization and muscle contraction; whether similar differences exist in the esophagus is unknown. The purpose of this study was to determine whether cADPR plays a role in the NO-mediated contraction of opossum esophageal LSM. Standard isometric tension recordings were performed using both LSM and CSM strips from opossum distal esophagus that were hung in 10-ml tissue baths perfused with oxygenated Krebs solution. cADPR produced concentration-dependent contraction of LSM strips with an EC(50) of 1 nM and peak contraction of 57 +/- 18% of the 60 mM KCl-induced contraction. cADPR had no effect on CSM strips at concentrations up to 10(-6) M. The EC(50) of cADPR caused contraction (18 +/- 2% from initial resting length) of isolated LSM cells. Sodium nitroprusside (SNP; 300 muM) induced contraction of LSM strips that averaged 67 +/- 5% of the KCl response. cADPR antagonists 8-bromo-cADPR and 8-amino-cADPR, as well as ryanodine receptor antagonists ryanodine and tetracaine, significantly inhibited the SNP-induced contraction. In conclusion, in the opossum esophagus, 1) cADPR induces contraction of LSM, but not CSM, and 2) NO-induced contraction of LSM appears to involve a cADPR-dependent pathway.
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Affiliation(s)
- R K Campbell
- Gastrointestinal Division, Hotel Dieu Hospital, 166 Brock St., Kingston, ON, Canada
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Abstract
BACKGROUND The altered motility of the inflamed intestine derives in part from changes to the contractility of the intestinal smooth muscle cell. While modifications to the muscarinic receptor system are identified, changes to 5-hydroxytryptamine (5-HT; serotonin) receptors that also mediate contraction are less well studied. METHODS In the trinitrobenzene sulphonic acid model of rat colitis, we used receptor antagonists to identify changes in receptor utilisation that accompany the selective reversal of the impaired contractile response to acetylcholine (ACh) and 5-HT during colitis (day 4 (D4)) and following resolution of inflammation (day 36 (D36)). RESULTS In isolated circular smooth muscle cells, challenged with ACh, the muscarinic 3 receptor (M3R) antagonists 4-DAMP and pF-HSD each showed a 50% decrease in antagonism on D4 while the M2R antagonist methoctramine more than doubled its potency, showing a decreased role of M3R and an increased role of M2R, respectively. These changes were fully reversed by D36. In contrast, the 5-HT2 receptor (5-HT2R) antagonist ketanserin was sharply decreased in effectiveness on D4, with a further decrease by D36, when the contribution of 5-HT(2A)R was only 22% of control. There were no changes in response to the 5-HT4R antagonist SDZ-205-557 at any time. Western blotting identified decreased expression of 5-HT(2A)R on D36 versus controls, further supporting the conclusion that the persistence of the impaired response to 5-HT was due to decreased expression of the excitatory 5-HT(2A)R. CONCLUSIONS Thus the lasting decrease in receptor expression and resulting impairment of the contractile response will compromise the capacity for an appropriate response to 5-HT, which may contribute to the intestinal dysfunction seen in post-enteritis syndromes.
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Affiliation(s)
- R W Wells
- Gastrointestinal Diseases Research Unit, Queen's University, Hotel Dieu Hospital, Kingston, Ontario K7L 5G2, Canada
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Wells RW, Blennerhassett MG. Persistent and selective effects of inflammation on smooth muscle cell contractility in rat colitis. Pflugers Arch 2004; 448:515-24. [PMID: 15107998 DOI: 10.1007/s00424-004-1286-1] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2004] [Accepted: 03/23/2004] [Indexed: 10/26/2022]
Abstract
Intestinal inflammation affects smooth muscle contractility contributing to altered motility, but changes to the individual smooth muscle cells are not well described. We used video microscopy to study the contractility of circular smooth muscle cells (CSMC) isolated from the rat mid-descending colon throughout the course of TNBS-induced colitis, measuring their shortening response to carbachol (CCh), 5-HT, histamine or high K(+). In control CSMC, CCh caused a maximal shortening response of 28 (2%), similar to that for 5-HT of 27 (1%), but by day 4 of colitis, these responses were decreased by 35% and 37%, respectively. By day 36, all aspects of cholinergic contraction returned to control levels, while 5-HT-induced contraction remained significantly attenuated. In contrast, the contractile responses to histamine remained similar at all time points. K(+)-induced contraction was impaired only on day 4, and the maximal response remained substantially greater than CCh or 5-HT. Colitis caused a 121% increase in CSMC length by day 2 that persisted through day 36, independent evidence for phenotypic change. We conclude that impaired CSMC contractility at both the receptor and non-receptor levels contribute to altered smooth muscle function during colitis. Persistent changes in contractile response remained detectable after resolution of inflammation, and similar events may occur in post-enteritis syndromes seen in humans.
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Affiliation(s)
- R W Wells
- Gastrointestinal Diseases Research Unit, Queen's University, K7L 5G2, Kingston, Ontario, Canada
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Abstract
Acid-induced esophagitis is associated with sustained longitudinal smooth muscle (LSM) contraction and consequent esophageal shortening. In addition, LSM strips from opossums with esophagitis are hyper-responsive, while the circular smooth muscle (CSM) contractility is impaired. To determine the origin of these changes, studies were performed on esophageal smooth muscle cells isolated from opossum esophagi perfused intraluminally on 3 consecutive days with either saline (control; n = 8) or HCl (n = 9). CSM and LSM cells, obtained by enzymatic digestion, were exposed to various concentrations of carbachol (CCh) and fixed. CCh induced concentration-dependent contraction of both LSM and CSM cells. CCh-induced LSM cell contraction was not different between control and esophagitis animals; however, there was marked attenuation in the CCh-induced contraction of CSM cells from esophagitis animals. Morphological studies revealed significant hypertrophy of the CSM cells. These findings suggest that impaired CSM contractility can be attributed at least in part to alterations to the CSM cell itself. In contrast, hyper-contractility demonstrated in LSM strips is likely related to factors in the surrounding tissue.
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Affiliation(s)
- R W Wells
- Gastrointestinal Diseases Research Unit, Hotel Dieu Hospital, and Department of Biology, Queen's University, Kingston, ON K7L 5G2, Canada
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Devine CE, Payne SR, Wells RW. Effect of muscle restraint on sheep meat tenderness with rigor mortis at 18°C. Meat Sci 2002; 60:155-9. [DOI: 10.1016/s0309-1740(01)00117-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2000] [Accepted: 04/23/2001] [Indexed: 10/27/2022]
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Abstract
Why are graduate nursing administration (MSN/A) program enrollments declining? Do these programs truly meet the needs of potential students? Will they help them to be effective and innovative partners on the healthcare management team? The authors explore reasons for the decline in MSN/A enrollments, potential negative outcomes, and currently available alternative educational choices. They then suggest MSN/A program redesign and other courses of actions. Nurse administrators and nurse educators must be aware of these trends and have equal input into the creation of a viable MSN/A program that will be able to survive in the 21st century.
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Affiliation(s)
- P M Haynor
- College of Nursing, Villanova University, PA, USA.
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Mateo MA, Newton CL, Wells RW. Making planned and unplanned role transitions. J Nurs Adm 1997; 27:17-23. [PMID: 9300011 DOI: 10.1097/00005110-199709000-00007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Changes in organizations mean planned and unplanned role transitions for nurse administrators and managers. Keeping abreast of trends engaging in activities that promote professional growth, assessing work habits, maintaining job interviewing skills, and reviewing and updating resumes are essential to prepare for role changes. When unplanned changes occur because one is fired or a position is abolished, one has to organize personal needs, cope with the job loss, look for a job, and assume a new role. The authors discuss strategies that can be used personally or with others to facilitate job change.
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Affiliation(s)
- M A Mateo
- Department of Nursing, Mayo Medical Center, Rochester, Minnesota, USA.
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Abstract
As organizations restructure and redesign, hiring appropriate staff members becomes even more crucial for their success. Skill sets become more complex, fit becomes more significant, and fast-paced organizations do not have the time or resources for extensive grooming or training of in-house or newly hired personnel. The authors examine how talented professionals can be recruited and hired in a timely manner while using fewer in-house organizational resources.
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Affiliation(s)
- R W Wells
- Bates & Associates, Health Care Management Consultants, Bala Cynwyd, PA, USA
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Wells RW. International predictive testing for NCLEX-RN. Rewards and risks. Nurs Health Care 1991; 12:470-3. [PMID: 1945059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The United States still relies heavily on foreign nurses, and that means heavy reliance on them passing the state board examinations. Can we predict successful performance? Wells tells us the risks and rewards.
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Haynor PM, Wells RW. Taking the plunge: selecting a computerized staffing and scheduling system. Aspens Advis Nurse Exec 1989; 4:1, 6-7. [PMID: 2635974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Smits SJ, Wells RW. Variables associated with sales and income in three vending facilities for the blind. J Rehabil 1979; 45:22-5. [PMID: 522107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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Fox MK, Langner SB, Wells RW. How good are hand washing practices? Am J Nurs 1974; 74:1676-8. [PMID: 4496520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Wells RW. Huntington's chorea: seeing beyond the disease. Am J Nurs 1972; 72:954-6. [PMID: 4259146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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