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Lee P, Kouba J, Jimenez EY, Kramer H. Medical Nutrition Therapy for Chronic Kidney Disease: Low Access and Utilization. Adv Kidney Dis Health 2023; 30:508-516. [PMID: 38453267 DOI: 10.1053/j.akdh.2023.12.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Revised: 11/27/2023] [Accepted: 12/04/2023] [Indexed: 03/09/2024]
Abstract
CKD affects approximately half of US adults aged 65 years and older and accounts for almost 1 out of every 4 dollars of total Medicare fee-for-service spending. Efforts to prevent or slow CKD progression are urgently needed to reduce the incidence of kidney failure and reduce health care expenditures. Current CKD care guidelines recommend medical nutrition therapy (MNT), a personalized, evidence-based application of the Nutrition Care Process (assessment, intervention, diagnosis, and monitoring and evaluation) provided by registered dietitian nutritionists (RDNs) to help slow CKD progression, improve quality of life, and delay kidney failure. MNT is covered by Medicare Part B and most private insurances with no cost sharing. Despite recommendations that patients with CKD receive MNT and insurance coverage for MNT, utilization remains low. This article demonstrates low utilization of MNT and inadequate numbers of RDNs and RDNs who are board certified in renal nutrition relative to the estimated number of Medicare eligible adults with self-reported diagnosed CKD by state, with noted disparities across states. We discuss interventions to increase MNT utilization, such as improving MNT reimbursement, augmenting accessibility of RDNs via telenutrition services and increasing health care provider promotion of MNT and referral to MNT to optimize CKD outcomes.
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Affiliation(s)
- Promise Lee
- Stritch School of Medicine, Loyola University Chicago, Maywood, IL
| | - Joanne Kouba
- Parkinson School of Health Sciences and Public Health, Loyola University Chicago, Stritch School of Medicine, Maywood, IL
| | - Elizabeth Yakes Jimenez
- Departments of Pediatrics and Internal Medicine and College of Population Health, University of New Mexico Health Sciences Center, Albuquerque, NM and Academy of Nutrition and Dietetics, Chicago, IL
| | - Holly Kramer
- Parkinson School of Health Sciences and Public Health, Loyola University Chicago, Stritch School of Medicine, Maywood, IL.
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Penckofer S, Ridosh M, Adams W, Grzesiak M, Woo J, Byrn M, Kouba J, Sheean P, Kordish C, Durazo-Arvizu R, Wallis D, Emanuele MA, Halaris A. Vitamin D Supplementation for the Treatment of Depressive Symptoms in Women with Type 2 Diabetes: A Randomized Clinical Trial. J Diabetes Res 2022; 2022:4090807. [PMID: 35280228 PMCID: PMC8913152 DOI: 10.1155/2022/4090807] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2021] [Accepted: 02/04/2022] [Indexed: 12/23/2022] Open
Abstract
AIM To determine the efficacy and safety of vitamin D3 supplementation in reducing depressive symptoms in women with type 2 diabetes (T2D), depression, and low vitamin D. METHODS In this double-blind randomized active comparator-controlled trial, women with significant depressive symptoms as assessed by the Center for Epidemiologic Studies Depression (CES-D) scale received weekly oral vitamin D3 supplementation (50,000 IU) or an active comparator (5,000 IU) for 6 months. Assessments of vitamin D, 25-hydroxyvitamin D [25 (OH) D], and depression were measured at baseline, 3 months, and 6 months. RESULTS A total of 129 women were randomized, from which 119 completed the study (57 in lower dose and 62 in higher dose). Participants had an average 25 (OH) D and HbA1c of 20.8 ng/mL and 7.8%, respectively, at baseline. They were diverse (48% Black) and had a mean age of 50 and T2D for about 8 years. Upon completion of vitamin D3 supplementation, serum 25 (OH) D levels increased with 50,000 IU (+34 ng/mL) and 5,000 IU (+10 ng/mL). There was no difference in CES-D scores by treatment dose. Overall, depressive symptoms significantly improved over time with an average CES-D decline of 12.98 points (95% CI: -15.04 to -10.93; p < 0.001). Among women with moderate baseline depressive symptoms, those receiving the lower dose had nominally lower depression scores at follow-up than those in the higher dose cohort. Among women with severe baseline depressive symptoms, the improvement in follow-up depression scores was the same regardless of dose. CONCLUSIONS There was no difference in the dosing effect of vitamin D3 supplementation for the treatment of depressive symptoms in women with T2D who present with significant symptoms and low vitamin D. Regardless of the dose, participants' mood improved over time. Further study of vitamin D to target depressive symptoms in comorbid populations is needed.
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Affiliation(s)
- Sue Penckofer
- Loyola University Chicago, Health Sciences Campus, Maywood, IL 60153, USA
| | - Monique Ridosh
- Loyola University Chicago, Health Sciences Campus, Maywood, IL 60153, USA
| | - William Adams
- Loyola University Chicago, Health Sciences Campus, Maywood, IL 60153, USA
| | - Meghan Grzesiak
- Loyola University Chicago, Health Sciences Campus, Maywood, IL 60153, USA
| | | | - Mary Byrn
- Loyola University Chicago, Health Sciences Campus, Maywood, IL 60153, USA
| | - Joanne Kouba
- Loyola University Chicago, Health Sciences Campus, Maywood, IL 60153, USA
| | - Patricia Sheean
- Loyola University Chicago, Health Sciences Campus, Maywood, IL 60153, USA
| | - Colleen Kordish
- Loyola University Chicago, Health Sciences Campus, Maywood, IL 60153, USA
| | | | - Diane Wallis
- Loyola University Chicago, Health Sciences Campus, Maywood, IL 60153, USA
| | - Mary Ann Emanuele
- Loyola University Chicago, Health Sciences Campus, Maywood, IL 60153, USA
| | - Angelos Halaris
- Loyola University Chicago, Health Sciences Campus, Maywood, IL 60153, USA
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Sinclair C, Schnobrich M, Stevenson J, Kouba J. 108 A preliminary investigation of anti-Müllerian hormone as a biomarker for fertility in mares. J Equine Vet Sci 2021. [DOI: 10.1016/j.jevs.2021.103571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Jacquay E, Zeglin L, Lillich J, Jones E, Kouba J. 63 Characterization of Foal Fecal Microbiome from Birth to Weaning and the Relationship to Mare Milk and Mare Feces. J Anim Sci 2018. [DOI: 10.1093/jas/sky073.061] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- E Jacquay
- Kansas State University, Manhattan, KS
| | - L Zeglin
- Kansas State University, Manhattan, KS
| | - J Lillich
- Kansas State University, Manhattan, KS
| | - E Jones
- Kansas State University, Manhattan, KS
| | - J Kouba
- Kansas State University, Manhattan, KS
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Penckofer S, Byrn M, Adams W, Emanuele MA, Mumby P, Kouba J, Wallis DE. Vitamin D Supplementation Improves Mood in Women with Type 2 Diabetes. J Diabetes Res 2017; 2017:8232863. [PMID: 29082262 PMCID: PMC5610883 DOI: 10.1155/2017/8232863] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Accepted: 07/27/2017] [Indexed: 12/30/2022] Open
Abstract
OBJECTIVE The aim of this study was to determine the effect of vitamin D supplementation on improving mood (depression and anxiety) and health status (mental and physical) in women with type 2 diabetes mellitus (T2DM). METHODS Fifty women with T2DM and significant depressive symptomology were enrolled into the "Sunshine Study," where weekly vitamin D supplementation (ergocalciferol, 50,000 IU) was given to all participants for six months. The main outcomes included (1) depression (Center for Epidemiologic Studies Depression, CES-D, and Patient Health Questionnaire, PHQ-9), (2) anxiety (State-Trait Anxiety), and (3) health status (Short Form, SF-12). RESULTS Forty-six women (92%) completed all visits. There was a significant decrease in depression (CES-D and PHQ-9, p < 0.001) and anxiety (state and trait, p < 0.001). An improvement in mental health status (SF-12, p < 0.001) was also found. After controlling for covariates (race, season of enrollment, baseline vitamin D, baseline depression (PHQ-9), and body mass index), the decline in depression remained significant (CES-D, p < 0.001). There was a trend for a better response to supplementation for women who were not taking medications for mood (antidepressants or anxiolytics) (p = 0.07). CONCLUSIONS Randomized trials to confirm that vitamin D supplementation can improve mood and health status in T2DM women are needed.
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Affiliation(s)
- Sue Penckofer
- Loyola University Chicago, Health Sciences Campus, 2160 S. First Avenue, Maywood, IL 60153, USA
| | - Mary Byrn
- Loyola University Chicago, Health Sciences Campus, 2160 S. First Avenue, Maywood, IL 60153, USA
| | - William Adams
- Loyola University Chicago, Health Sciences Campus, 2160 S. First Avenue, Maywood, IL 60153, USA
| | - Mary Ann Emanuele
- Loyola University Chicago, Health Sciences Campus, 2160 S. First Avenue, Maywood, IL 60153, USA
| | - Patricia Mumby
- Loyola University Chicago, Health Sciences Campus, 2160 S. First Avenue, Maywood, IL 60153, USA
| | - Joanne Kouba
- Loyola University Chicago, Health Sciences Campus, 2160 S. First Avenue, Maywood, IL 60153, USA
| | - Diane E. Wallis
- Advocate Medical Group, 3825 Highland Avenue, Suite 400, Downers Grove, IL 60515, USA
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Johnson JE, Gulanick M, Penckofer S, Kouba J. Does knowledge of coronary artery calcium affect cardiovascular risk perception, likelihood of taking action, and health-promoting behavior change? J Cardiovasc Nurs 2015; 30:15-25. [PMID: 24434820 DOI: 10.1097/jcn.0000000000000103] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [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: 11/25/2022]
Abstract
BACKGROUND Evidence indicates that a healthy lifestyle can reduce cardiovascular disease risk, yet many people engage in unhealthy behaviors. New technologies such as coronary artery calcium (CAC) screening detect atherosclerosis before clinical disease is manifested. Knowledge of an abnormal finding could provide the "teachable moment" to enhance motivation for change. OBJECTIVE The aim of this study was to examine how knowledge of CAC score affects risk perception, likelihood of taking action, and health-promoting behavior change in persons at high risk for cardiovascular disease. METHODS This study used a descriptive prospective design with 174 high-risk adults (≥3 major risk factors) recruited at a radiology center offering CAC scans. Baseline self-report surveys using the Perception of Risk of Heart Disease Scale, the Benefits and Barriers Scale, the Quality of Life Index, and the Health-Promoting Lifestyle Profile II were completed immediately after a screening CAC scan but before results were known. Follow-up occurred 3 months later using mailed packets. RESULTS Participants' mean age was 58 years; 62% were men, 89% were white, and most were well educated. There was no significant change in risk perception scores over time or between groups, except for a positive interaction in the moderate-risk group (CAC scores of 101-400) (P = .004). Quality of life remained unchanged. Health-promoting behavior changes increased in all groups over time (P < .001). McNemar χ² analysis indicated that risk reduction medication use increased in all groups, with a significant increase in statin (P < .001) and aspirin (P < .001) intake. Predictors of behavior change were perceived barriers (β = -.41; P < .001) and quality of life (β = .44; P < .001). CONCLUSIONS Knowledge of CAC score does impact risk perception for some at-risk groups. This knowledge does enhance motivation for behavior change. Knowledge of CAC score does not impact quality of life. It is hoped that through improved understanding of the effect of CAC scoring on behavior change, nurses can better assist patients to modify behaviors during teachable moments.
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Affiliation(s)
- Jennie E Johnson
- Jennie E. Johnson PhD, RN-BC Lifestyle Counselor, Owner, Living For A Healthy Heart, LLC, Post Falls, Idaho. Meg Gulanick, PhD, APRN, FAAN Professor Emeritus, Niehoff School of Nursing, Loyola University, Chicago, Illinois. Sue Penckofer, PhD, RN, FAAN Professor and Loyola Faculty Scholar, Niehoff School of Nursing, Loyola University, Chicago, Illinois. Joanne Kouba, PhD, RD, LDN Director, Dietetics Programs, Niehoff School of Nursing, Loyola University, Chicago, Illinois
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Suarez-Balcazar Y, Kouba J, Jones LM, Lukyanova VV. A University–School Collaboration to Enhance Healthy Choices Among Children. J Prev Interv Community 2014; 42:140-51. [DOI: 10.1080/10852352.2014.881193] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Velsor-Friedrich B, Militello LK, Kouba J, Harrison PR, Manion A, Doumit R. Pediatric obesity and asthma quality of life. Nurs Clin North Am 2013; 48:259-70. [PMID: 23659812 DOI: 10.1016/j.cnur.2013.01.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Widely researched as separate entities, our understanding of the comorbid effects of childhood obesity and asthma on quality of life is limited. This article discusses the effects of childhood obesity and asthma on self-reported quality of life in low-income African American teens with asthma. When controlling for the influence of symptom frequency, asthma classification, asthma self-efficacy, and asthma self-care levels, body mass index remains a most important factor in determining self-reported quality of life among teens with asthma. Although overweight and obesity did not change the effectiveness of the asthma intervention program, obesity did affect participants quality of life scores.
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Kouba J, Velsor-Friedrich B, Militello L, Harrison PR, Becklenberg A, White B, Surya S, Ahmed A. Efficacy of the I Can Control Asthma and Nutrition Now (ICAN) pilot program on health outcomes in high school students with asthma. J Sch Nurs 2012; 29:235-47. [PMID: 23169895 DOI: 10.1177/1059840512466110] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Asthma is the most prevalent chronic illness in childhood affecting 7 million youth. Many youth with asthma face another risk factor in obesity. Obesity, in turn, increases disorders such as asthma. Studies have recommended that asthma programs also address weight management in youth. Taking this into consideration, the I Can Control Asthma and Nutrition Now (ICAN) program is an innovative school-based program composed of (1) nutrition and weight management education, (2) asthma education, and (3) monthly reenforcement visits. This pilot study tested the initial effectiveness of the ICAN pilot program on a variety of asthma and nutrition outcomes in 25 urban minority students with asthma. Over the course of the pilot program, significant increases in asthma knowledge, asthma self-efficacy, asthma quality of life, asthma self-care, nutrition knowledge, nutrition self-efficacy, and asthma control were observed. The ICAN program has demonstrated promising preliminary results in improving nutrition and asthma health outcomes with urban minority high school students.
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Affiliation(s)
- Joanne Kouba
- Niehoff School of Nursing, Loyola University Chicago, Chicago, IL 60513, USA.
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Abstract
Depression in its own right is a disabling condition impairing all aspects of human function. In persons with a chronic medical disease, depression often makes the management of chronic illness more difficult. Recently, vitamin D has been reported in the scientific and lay press as an important factor that may have significant health benefits in the prevention and the treatment of many chronic illnesses. Most individuals in this country have insufficient levels of vitamin D. This is also true for persons with depression as well as other mental disorders. Whether this is due to insufficient dietary intake, lifestyle (e.g., little outdoor exposure to sunshine), or other factors is addressed in this paper. In addition, groups at risk and suggested treatment for inadequate vitamin D levels are addressed. Effective detection and treatment of inadequate vitamin D levels in persons with depression and other mental disorders may be an easy and cost-effective therapy which could improve patients' long-term health outcomes as well as their quality of life.
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Affiliation(s)
- Sue Penckofer
- Loyola University Chicago, School of Nursing, Maywood, Illinois 60153, USA.
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Abstract
Diabetes is a leading cause of cardiovascular disease. Persons with diabetes are at greater risk for early cardiac mortality, and for repeat events if they survive their first cardiac event. Recently, low serum concentrations of vitamin D have been associated with increased risk for cardiac events. Evidence indicates that persons with diabetes have lower serum concentrations of vitamin D. In addition, persons at risk for diabetes or metabolic syndrome have inadequate serum concentrations of vitamin D. This review will assess the evidence relative to the impact of vitamin D in the development of diabetes, metabolic syndrome, and diabetes complications. Studies that address vitamin D and its impact on metabolic outcomes as well as possible mechanisms of action are provided. Finally, the assessment and suggested treatment for vitamin D deficiency is addressed. Effective detection and treatment of inadequate vitamin D concentrations in persons with diabetes or those at risk for diabetes may be an easy and cost-effective therapy which could improve their long-term health outcomes as well as their quality of life.
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Affiliation(s)
- Sue Penckofer
- The School of Nursing, Faculty Scholar, Loyola University Chicago, Chicago, Illinois (Dr Penckofer)
| | - Joanne Kouba
- School of Nursing, Director of Dietetics Program, Loyola University Chicago, Chicago, Illinois (Dr Kouba)
| | - Diane E Wallis
- Midwest Heart Specialists, Loyola University Chicago, Chicago, Illinois (Dr Wallis)
| | - Mary Ann Emanuele
- Stritch School of Medicine, Division of Endocrinology & Metabolism, Loyola University Chicago, Chicago, Illinois (Dr Emanuele)
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Suarez-Balcazar Y, Redmond L, Kouba J, Hellwig M, Davis R, Martinez LI, Jones L. Introducing systems change in the schools: the case of school luncheons and vending machines. Am J Community Psychol 2007; 39:335-45. [PMID: 17450424 DOI: 10.1007/s10464-007-9102-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
A major public health crisis facing America's society is the increase in child and youth obesity, which has seen a fourfold increase in the last four decades. Major concerns include what children eat for school lunch and what other foods are available in schools. This paper illustrates efforts towards systems change in the luncheon program and food vending machines in the Chicago Public Schools. We discuss the different factors that lead to such changes using the framework of the social ecological model and the soft systems methodology, and we analyze how the resulting innovation was implemented and evaluated. First, we present a theoretical perspective to explain factors that influence children's eating patterns from a systems approach. Second, we discuss the antecedent factors that lead to systems change. Finally, we examine challenges to systems change, such as resistance to change, different stakeholder priorities, lack of resources, institutional bureaucracy, and unrealistic funder expectations.
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Affiliation(s)
- Yolanda Suarez-Balcazar
- College of Applied Health Sciences, University of Illinois at Chicago, 1919 West Taylor, Chicago, IL 60612, USA.
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Abstract
OBJECTIVE The purpose of the present study was to characterise the food landscape of an inner city African American neighbourhood and its mixed-race suburban neighbour. Detailed analysis focuses on the relationship between community store mix and price, availability and produce quality. DESIGN A market basket study was completed by members of the Chicago Food Systems Collaborative. The US Department of Agriculture's standard market basket survey and methodology were used. Additional items and analyses were added in consultation with community members. SETTING Austin is a lower-middle-class African American community of 117,500 on the western edge of Chicago. Oak Park, which borders Austin, is an upper-middle-income suburb of 52,500 with a mixed racial profile. SUBJECTS A market basket survey of every retail food store in Austin and Oak Park was completed. A total of 134 were included. RESULTS Results indicate that Austin has many grocery stores and few supermarkets. Many Austin groceries stores carry produce that is usually competitively priced, but often of unacceptable quality. Supermarkets had the best selection. Prices were lowest at discount supermarkets. Prices of packaged items were higher at independent stores than at chain supermarkets, but fresh items were cheaper. CONCLUSIONS Food access is related more to store type than number. In this study, item availability and produce quality varied greatly between store types. Price differences were complicated and varied by store type and food category. This has consequences in terms of food purchasing decisions and dietary quality that public health professionals should acknowledge.
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Affiliation(s)
- Daniel Block
- Department of Geography, Sociology, Economics, and Anthropology, Chicago State University, 9501 South King Drive, Chicago, IL 60628, USA.
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Suarez-Balcazar Y, Hellwig M, Kouba J, Redmond L, Martinez L, Block D, Kohrman C, Peterman W. The making of an interdisciplinary partnership: the case of the Chicago Food System Collaborative. Am J Community Psychol 2006; 38:113-23. [PMID: 16897424 DOI: 10.1007/s10464-006-9067-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Interdisciplinary partnerships foster innovation to address pressing social problems. This paper describes an interdisciplinary partnership called the Chicago Food System Collaborative (CFSC) composed of a team of partners from four academic institutions and three community-based organizations representing a total of eight disciplines that included: community development and community organizing, community psychology, geography, nursing, nutrition, public health, sociology, and urban planning and policy. Partners came together to address the issue of access to healthy foods and nutrition in a working class African American neighborhood. We analyze and discuss the core principles that guided the partnership and its impact across three dimensions: understanding through interdisciplinary action research, building capacity, and facilitating innovations in practices and policies. Despite the challenges of interdisciplinary partnerships, the potential benefits and impact of such efforts reflect their value as a comprehensive approach to addressing complex social problems.
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Affiliation(s)
- Yolanda Suarez-Balcazar
- College of Applied Health Sciences, University of Illinois at Chicago, 1919 West Taylor, MC 811, 60612, USA
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Abstract
Four of 19 patients with acute renal failure (ARF) requiring dialytic therapy were hypophosphatemic (serum phosphate, 0.8 +/- 0.8 mg/dL) during their illness. The hypophosphatemia could not be attributed to differences in the etiology of renal failure, frequency of dialysis, or residual renal function. No hypophosphatemic patient received phosphate-binding antacids. The hypophosphatemia was related to carbohydrate (CHO) providing a large percentage (greater than 79%) of total calories for a prolonged period. This complication was likely caused by tissue anabolism as well as by CHO-stimulated, insulin-induced intracellular shifts of phosphate. The greater use of parenteral fat as a caloric source and more aggressive phosphate supplementation despite the presence of ARF may help prevent this complication.
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Affiliation(s)
- P Kurtin
- Department of Pediatrics, New England Medical Center, Boston, MA
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Dennert G, Crowley C, Kouba J, Lotan R. Retinoic acid stimulation of the induction of mouse killer T-cells in allogeneic and syngeneic systems. J Natl Cancer Inst 1979; 62:89-94. [PMID: 309967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The ability of retinoic acid (RA), a potent antitumor agent, to stimulate cell-mediated cytotoxicity (CMC) in mice was investigated. Low doses of RA (5-300 micrograms/mouse/day) administered ip into C57BL/6 mice for 5 days daily or for 1--3 months three times a week before immunization in vivo or in vitro with allogeneic BALB/c S194 myeloma cells led to an enhanced cytotoxic activity of their spleen effector cells. Similarly, in a syngeneic situation injection of RA into C57BL/6 or BALB/c mice before in vitro challenge with EL 4 (C57BL/6) or S194 (BALB/c) tumor cells strongly stimulated CMC. The enhanced cytotoxic activity was effected by thymus-derived lymphocytes (T-cells) and specific for the H-2 histocompatibility antigens in the case of the allogeneic sensitization or specific for tumor antigens in the case of the syngeneic sensitization. Because RA had no effect on the effector step of CMC, RA likely enhanced the induction step of T-CMC. The action of RA was antigen-dependent, and it is therefore a true adjuvant rather than a nonspecific stimulator or polyclonal activator of cytotoxic T-cells.
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Collman JP, Gagne RR, Kouba J, Ljusberg-Wahren H. Letter: Reversible oxygen adduct formation in cobalt(II) "picket fence porphyrins". J Am Chem Soc 1974; 96:6800-2. [PMID: 4414379 DOI: 10.1021/ja00828a064] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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