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At least 145 records · Page 8Linked to original sources
PubMed1981

Effect of bile acid gavage or vagotomy and pyloroplasty on gastrointestinal carcinogenesis.

Possible promotion of MNNG-induced gastrointestinal carcinogenicity was evaluated in male Wistar rats exposed to unconjugated bile acid given as gavage or as obtained through truncal vagotomy plus pyloroplasty. No significant difference was found compared with the relevant control groups. Even though gastroduodenal erosions were found more frequently in the bile acid gavage and MNNG groups than in MNNG-treated controls, secondary deconjugated bile acids apparently did not reach optimal promoting concentrations. In contrast to partial gastrectomy, vagotomy and pyloroplasty does not increase the tumor yield in the rat.

Adenocarcinoma↗
PubMed1988

Mutational analysis of the sequence and structural requirements in brome mosaic virus RNA for minus strand promoter activity.

An RNA-dependent RNA polymerase (replicase) activity that specifically copies brome mosaic virus (BMV) RNAs in vitro can be prepared from BMV-infected barley leaves. The signals directing complementary (minus) strand synthesis reside within the 3' 134-nucleotide-long tRNA-like structure that is common to each of the virion RNAs. By studying the influence of minus strand synthesis of numerous mutations introduced throughout this region of the RNA, we have mapped in detail the sequence and structural elements necessary for minus strand promoter activity. Sequence alterations (either substitutions or small, structurally discrete deletions) in most parts of the tRNA-like structure resulted in decreased minus strand synthesis. This suggests that BMV replicase is a large enzyme, possibly composed of several subunits. The lowest activities, 5 to 8% of wild type, were observed for mutants with substitutions at three separate loci, identifying one structural and two sequence-specific elements essential for optimal promoter activity. (1) Destabilization of the pseudoknot structure in the aminoacyl acceptor stem resulted in low promoter activity, demonstrating the importance of a tRNA-like conformation. (2) Substitution of the C residue adjacent to the 3' terminus resulted in low promoter activity, probably by interfering with strand initiation. (3) The low activities resulting from substitutions and a small deletion in arm C suggest this region of the RNA to be a major feature involved in replicase binding. In particular, nucleotides within the loop of arm C appear to be involved in a sequence-specific interaction with the replicase.

Autoradiography↗
PubMed1999

Animal v. plant foods in human diets and health: is the historical record unequivocal?

An ideal diet is one that promotes optimal health and longevity. Throughout history, human societies have developed varieties of dietary patterns based on available food plants and animals that successfully supported growth and reproduction. As economies changed from scarcity to abundance, principal diet-related diseases have shifted from nutrient deficiencies to chronic diseases related to dietary excesses. This shift has led to increasing scientific consensus that eating more plant foods but fewer animal foods would best promote health. This consensus is based on research relating dietary factors to chronic disease risks, and to observations of exceptionally low chronic disease rates among people consuming vegetarian, Mediterranean and Asian diets. One challenge to this consensus is the idea that palaeolithic man consumed more meat than currently recommended, and that this pattern is genetically determined. If such exists, a genetic basis for ideal proportions of plant or animal foods is difficult to determine; hominoid primates are largely vegetarian, current hunter-gatherer groups rely on foods that can be obtained most conveniently, and the archeological record is insufficient to determine whether plants or animals predominated. Most evidence suggests that a shift to largely plant-based diets would reduce chronic disease risks among industrialized and rapidly-industrializing populations. The accomplish this shift, it will be necessary to overcome market-place barriers and to develop new policies that will encourage greater consumption of fruits, vegetables and grains as a means to promote public health.

Animals↗
PubMed2005

Wound debridement: therapeutic options and care considerations.

Wound debridement is a critical component of promoting optimal healing for a wound with necrotic tissue. Although much is known about the multiple barriers to healing that necrotic detritus presents, much is still unknown about the best ways, timing, and approaches to constructing a healthy wound bed. Falanga's "black box," a metaphor for the unknown components of wound healing and debridement, should remind all practitioners that future research needs to address the continuing questions and issues associated with promotion of quality chronic wound healing outcomes.

Contraindications↗
PubMed2002

Continuous psoas compartment block for postoperative analgesia after total hip arthroplasty: new landmarks, technical guidelines, and clinical evaluation.

UNLABELLED: A computed tomographic scan was obtained in 35 patients to measure the depth and the relationship of the branches of the lumbar plexus to the posterior superior iliac spine projection and the vertebral column. In addition, we prospectively studied 80 patients scheduled for total hip arthroplasty who received a continuous psoas compartment block (CPCB) in the postoperative period. CPCB was performed after surgical procedures by using modified Winnie's landmarks and nerve stimulation. From 5 to 8 cm of catheter was inserted. Radiographs were obtained after injection of 10 mL of contrast medium. An initial loading dose (0.4 mL/kg) of 0.2% ropivacaine was injected, followed by continuous infusion of 0.2% ropivacaine for 48 h. The depth of the lumbar plexus and the distance between the lumbar plexus and the L4 transverse process were measured. Visual analog scale values of pain at 1, 12, 24, and 48 h were obtained at rest and during mobilization. Amounts of rescue analgesia were also recorded. Sensory blockade of the principal branches of the lumbosacral plexus was noted at 1 and 24 h, as were adverse events related to the technique. There was a significant difference between men and women in depth of the lumbar plexus (median values, 85 vs 70 mm for men and women, respectively). There was a positive correlation between the body mass index and skin-lumbar plexus distances. In contrast, there was no difference regarding the distance between the transverse process of L4 and the lumbar plexus. The catheter tip lay within the psoas major muscle in 74% of the patients and between the psoas and quadratus lumborum muscles in 22%. In three patients, the catheter was improperly positioned. At 1 h, sensory blockade of the femoral, obturator, and lateral femoral cutaneous nerves was successful in, respectively, 95%, 90%, and 85% of patients. At 24 h, these rates were 88%, 88%, and 83%, respectively. During the 48-h study period, median visual analog scale values of pain were approximately 10 mm at rest and from 18 to 25 mm during physiotherapy. Five patients received 5 mg of morphine at 1 h. Five cases of unilateral epidural anesthesia were noted after the bolus injection. We conclude that CPCB with 0.2% ropivacaine allows optimal analgesia after hip arthroplasty, with few side effects and a small failure rate. Before lumbar plexus branch stimulation and catheter insertion, anesthesiologists should be aware of the L4 transverse process location and lumbar plexus depth. IMPLICATIONS: Lumbar plexus depth is correlated with the patient's body mass index and differs between men and women, but this is not true of the lumbar plexus-transverse process distance. Considering new landmarks, a continuous psoas compartment block promotes optimal analgesia after hip arthroplasty, with few side effects.

Adult↗
PubMed1987

Interactions of T7 RNA polymerase with T7 late promoters measured by footprinting with methidiumpropyl-EDTA-iron(II).

The interactions of T7 RNA polymerase with T7 late promoters were studied by using quantitative footprinting with methidiumpropyl-EDTA X Fe(II) [MPE-Fe(II)] as the DNA cleaving agent. Class II and class III T7 promoters have a highly conserved 23 base pair sequence from -17 to +6. Among class III promoters the -22 to -18 region is also highly conserved. For a class II promoter, T7 RNA polymerase protects the -17 to -4 region from MPE-Fe(II) cleavage; when GTP is present, protection extends from -17 to +5 (noncoding strand). For a class III promoter, protection extends from -20 to -4 and in the presence of GTP from -20 to +5 (noncoding strand). The protected regions for the coding strands of both promoters were nearly identical with that seen for the noncoding strands. The binding constant for the class III promoter is (4 +/- 1.5) X 10(7) M-1 and in the presence of GTP increases to (10 +/- 1.7) X 10(7) M-1. These binding constants are about 1000 and 200 times greater, respectively, than values reported previously [Ikeda, R. A., & Richardson, C. C. (1986) Proc. Natl. Acad. Sci. U.S.A. 83, 3614-3618]. The differences in binding constants are probably due to tRNA and high salt used in those earlier experiments. Both tRNA and high salt (greater than 50 mM NaCl and greater than 10 mM MgCl2) inhibit the binding of the polymerase to the promoter. Optimal binding conditions occur at 2-5 mM MgCl2 and 0-10 mM NaCl.(ABSTRACT TRUNCATED AT 250 WORDS)

Base Sequence↗
PubMed2006

Conceptions of wellness among the Yup'ik of the Yukon-Kuskokwim Delta: the vitality of social and natural connection.

Focus group research was conducted to examine indigenous conceptions of wellness among the Yup'ik Eskimos of southwestern Alaska. The dialogue on wellness emphasized the importance of living a traditional lifestyle, seeking creative solutions to manage drastic cultural change, and fostering connection within the communities and the native landscape. These themes mesh well with existing characterizations of Alaska Native experiences and worldviews, and reflect substantial links between enculturation, acculturation and health. The data underscores the importance of comprehending local conceptions of wellness in order to effectively work toward promoting optimal health. This paper represents part of an ongoing dialogue in which researchers and native communities co-direct the investigation into healthy ways of being in the world.

Acculturation↗
PubMed1996

Promoting parenting by keeping new families together from birth through dismissal.

Many new parents enter parenting ill-prepared to care for their newborn. Nurses promote optimal parenting by facilitating parent-newborn contact immediately after birth and sustaining continual contact during the brief hospitalization. By serving as positive role models, continually assessing, teaching, and reevaluating the parental knowledge base and care, nurses prepare parents for the challenging role of parenting.

Adolescent↗
PubMed1984

Chemical signals that regulate mammalian oocyte maturation.

The nature and functions of the chemical signals involved in the acquisition of competence to resume meiosis, and the maintenance of meiotic arrest in antral follicles are the subjects of this paper. Evidence indicating that gonadotropins are not required for the development of competence to undergo spontaneous maturation is discussed. However, gonadotropins may promote optimal conditions for oocyte development via an estrogen-dependent action on follicular cells. Evidence for the participation of cyclic AMP (cAMP), steroids and a putative maturation-inhibiting factor in the maintenance of meiotic arrest in mammalian oocytes is discussed. Cyclic AMP seems to play a critical role in the maintenance of meiotic arrest by actions in both granulosa/cumulus cells and oocytes. However, cAMP does not appear to equilibrate between cumulus cells and oocytes. In the granulosa/cumulus cells, cAMP may promote the generation/activation of a maturation-inhibiting factor which is transferred to the oocyte. Oocyte cAMP appears to be produced in the oocyte itself. The putative maturation-inhibiting factor may be maintained in an active form by a cAMP-dependent process in the oocyte. Alternatively, the putative maturation-inhibiting factor may play a role in maintaining oocyte cAMP levels. Some steroid hormones act synergistically with a cAMP-dependent process in the oocyte to maintain meiotic arrest. However, the physiological significance of this observation remains in question.

Animals↗
PubMedDate not supplied

An integrative literature review of cardiac risk factor management in diabetes education interventions.

PURPOSE: The purposes of this paper are to (1) review the literature on educational interventions for adults with type 2 diabetes; (2) determine what kinds of interventions have been studied; (3) identify which interventions have included cardiac risk factor management; (4) determine how effective these interventions have been on metabolic control, diabetes-related outcomes, and cardiovascular-related outcomes; and (5) make recommendations for further research on combined interventions designed to promote optimal diabetes and cardiac risk factor management in adults with type 2 diabetes. METHODS: Using an integrative literature review approach, 64 studies on diabetes education interventions for adults with diabetes published between 1987 and 1998 were reviewed; 44 met these criteria. RESULTS: Few studies included cardiac risk factor management, which should be an integral part of diabetes management. Most studies demonstrated a beneficial effect of education on the management of type 2 diabetes but not cardiovascular risk. CONCLUSIONS: Identifying strategies that promote effective disease management for improved diabetes control and reduction of cardiac events in adults with diabetes is essential. Further intervention studies focusing on the combined management of diabetes and cardiac risk factors are warranted.

Adult↗
PubMed1997

Guidelines for school health programs to promote lifelong healthy eating.

Healthy eating patterns in childhood and adolescence promote optimal childhood health, growth, and intellectual development; prevent immediate health problems, such as iron deficiency anemia, obesity, eating disorders, and dental caries; and may prevent long-term health problems, such as coronary heart disease, cancer, and stroke. School health programs can help children and adolescents attain full educational potential and good health by providing them with the skills, social support, and environmental reinforcement they need to adopt long-term, healthy eating behaviors. This report summarizes strategies most likely to be effective in promoting healthy eating among school-age youths and provides nutrition education guidelines for a comprehensive school health program. These guidelines are based on a review of research, theory, and current practice, and they were developed by CDC in collaboration with experts from universities and from national, federal, and voluntary agencies. The guidelines include recommendations on seven aspects of a school-based program to promote healthy eating: school policy on nutrition, a sequential, coordinated curriculum, appropriate instruction for students, integration of school food service and nutrition education, staff training, family and community involvement, and program evaluation.

Adolescent↗
PubMed1992

Polysialic acid is required for optimal growth of axons on a neuronal substrate.

Formation of axonal pathways involves a variety of molecules that influence cell-cell interactions. The polysialic acid (PSA) moiety of the neural cell adhesion molecule (NCAM) is present on neuronal surfaces during process outgrowth. Our studies reveal that the removal of PSA causes a decrease in the rate of elongation of retinal cell processes on a substrate of neuronal membranes derived from chick tectum. This effect was partially reversed by antibodies against the L1 adhesion molecule, but not by antibodies against NCAM, N-cadherin, or beta 1-integrins. This predominant effect of PSA on L1 was also observed in short-term, cell-cell adhesion assays, suggesting that PSA promotes optimal outgrowth on neuronal substrates by limiting the consequences of L1-mediated adhesion.

Animals↗
PubMed1996

Guidelines for school health programs to promote lifelong healthy eating. Centers for Disease Control and Prevention.

Healthy eating patterns in childhood and adolescence promote optimal childhood health, growth, and intellectual development; prevent immediate health problems, such as iron deficiency anemia, obesity, eating disorders, and dental caries; and may prevent long-term health problems, such as coronary heart disease, cancer, and stroke. School health programs can help children and adolescents attain full educational potential and good health by providing them with the skills, social support, and environmental reinforcement they need to adopt long-term, healthy eating behaviors. This report summarizes strategies most likely to be effective in promoting healthy eating among school-age youths and provides nutrition education guidelines for a comprehensive school health program. These guidelines are based on a review of research, theory, and current practice, and they were developed by CDC in collaboration with experts from universities and from national, federal, and voluntary agencies. The guidelines include recommendations on seven aspects of a school-based program to promote healthy eating: school policy on nutrition, a sequential, coordinated curriculum, appropriate instruction for students, integration of school food service and nutrition education, staff training; family and community involvement, and program evaluation.

Adolescent↗
PubMed1988

Optimal use of an occlusive dressing to enhance healing. Effect of delayed application and early removal on wound healing.

We examined the effect of delayed application and early removal of a polyurethane dressing on excisional wounds in swine. Backs of pigs were wounded with an electrokeratome, and wounds were divided into the following treatment groups: (1) air exposed; (2) dressings applied immediately after wounding and kept on until wounds were evaluated; (3) dressings applied immediately after wounding and removed at 6, 24, or 48 hours; and (4) dressings applied 2, 6, and 24 hours after wounding. Wounds were excised on days 3 through 7 and incubated in sodium bromide to allow separation of the epidermis and dermis. Specimens were considered healed if no defect was present. To promote optimal resurfacing in superficial wounds, polyurethane dressings need to be applied within two hours after wounding and should be kept in place for at least a 24-hour period.

Animals↗
PubMed1991

Nutritional management of children and adolescents with insulin-dependent diabetes mellitus: a review by the diabetes care and education dietetic practice group.

Although individuals with insulin-dependent diabetes mellitus (IDDM) represent only a small proportion of the total number of persons with diabetes, IDDM is one of the most prevalent chronic childhood diseases. The goals of management in IDDM include normal growth and development, control of blood glucose, maintenance of optimal nutritional status, and prevention of complications. Insulin replacement is the mainstay of treatment in IDDM; however, optimal therapy requires a careful balance of food, insulin, and physical activity. To our knowledge, this is the first comprehensive nutrition review of IDDM that emphasizes research specifically in the area of IDDM (vs non-insulin-dependent diabetes mellitus), including data on children and adolescents when available. the process of nutrition education utilizes a staged approach beginning with "survival" information and progressing to in-depth or continuing education and counseling. Important considerations should be to guide the child/adolescent to a meal plan that fits individual life-style, promotes optimal compliance, and advances the goals of management. Throughout the diabetes nutrition education process, the dietitian can positively affect the lives of children/adolescents and their families. More research is needed to better define ways of meeting the nutrition needs of children and adolescents with IDDM in the areas of fiber and glycemic control, fish oil and lipids, sodium and hypertension, and weight control.

Adolescent↗
PubMed1997

The role of sutures and fibrin sealant in wound healing.

Sutures and fibrin sealant are important surgical aids for facilitating wound closure and creating an optimal setting for wound healing. Most commonly, sutures are used to close wounds because suture material provides the mechanical support necessary to sustain closure. A wide variety of suturing material is available, and the surgeon can choose among sutures with a range of attributes to find the one best suited to his or her needs. Considerations when choosing an appropriate suture for wound closure and healing include strength of suture, holding power of tissue, absorbability, risk of infection, and inflammatory reaction associated with the suture material. Other factors to be considered include type of incision, suturing technique, and appearance of wound site. Fibrin sealant, in contrast, is a biologic tissue adhesive that can function as a useful adjunct to sutures. Fibrin sealant can be used in conjunction with sutures or tape to promote optimal wound integrity, or it can be used independently to seal wound sites where sutures cannot control bleeding or would aggravate bleeding. This adhesive can effectively seal tissue planes and eliminate potential spaces. Fibrin sealant has been used clinically in many surgical applications, although an FDA-approved commercially available product does not yet exist in the United States. Clinically, fibrin sealant has resulted in a low rate of infection and has promoted healing. Further study is needed to determine the best fibrin sealant mixtures both to achieve hemostasis and to encourage healing. It may even be desirable to use different sealant formulations for particular clinical situations.

Fibrin Tissue Adhesive↗
PubMed1995

Placebo effect and randomized clinical trials.

The achievement of optimal therapeutic results presupposes the use of appropriate treatment combined with maximal utilization of placebo effects. These aims may sometimes be difficult to satisfy in randomized clinical trials (RCTs). The question thus arises whether there is a conflict between the goals of therapy and those of experimental research; and if so, to what extent, and how is it handled in practice by clinicians and researchers. Various ethical problems have been discussed in several reports connected with RCTs. But we have found no discussion concerning the conflict between obtaining informed consent and promoting optimal placebo effects. Information about RCTs can be given in various ways. Sometimes appropriate information about RCTs to patients involves non-optimal utilization of placebo effects. This gives rise to ethical and methodological problems, which are discussed in this article.

Conflict of Interest↗
PubMedDate not supplied

Using evidence-based educational strategies to increase knowledge and skills in tobacco cessation.

To meet the demand for improved patient outcomes and accountability for healthcare delivery, nurses must embrace a culture of evidence-based practice (EBP). Integrating EBP for tobacco cessation in nursing practice is particularly important for the 44.5 million smokers in the United States who contribute to 157 billion dollars of healthcare costs annually. Unfortunately, studies reveal that healthcare providers are not aware of what is considered the best evidence, the United States Public Health Service Clinical Practice Guideline: Treating Tobacco Use and Dependence, resulting in missed opportunities to promote optimal health outcomes for individuals wanting to quit smoking. Fortunately, leading healthcare authorities such as the Joint Commission of Accreditation for Healthcare Organizations and Centers for Medicare and Medicaid Services now require providers to offer tobacco cessation services. The challenges and opportunities to do this effectively are many and with limited resources it will be increasingly important to ensure that nurses have the necessary knowledge and skills to improve tobacco cessation outcomes. For tobacco cessation interventions to become a standard of nursing practice, strategic efforts must be directed at advancing nursing research that evaluates best educational strategies for promoting tobacco cessation interventions within nursing curricula. In this article, a framework to help address nursing strategies to bridge the gap between EBP and tobacco cessation will be described.

Counseling↗