101
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Wilkinson B, Rodriguez R, Chen H, Gandour-Edwards R, Goodwin N. 46 The JAX PDX Resource: Changing the Course of Clinical Advancement. Eur J Cancer 2012. [DOI: 10.1016/s0959-8049(12)71844-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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102
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Viscarra JA, Vázquez-Medina JP, Rodriguez R, Champagne CD, Adams SH, Crocker DE, Ortiz RM. Decreased expression of adipose CD36 and FATP1 are associated with increased plasma non-esterified fatty acids during prolonged fasting in northern elephant seal pups (Mirounga angustirostris). ACTA ACUST UNITED AC 2012; 215:2455-64. [PMID: 22723485 DOI: 10.1242/jeb.069070] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The northern elephant seal pup (Mirounga angustirostris) undergoes a 2-3 month post-weaning fast, during which it depends primarily on the oxidation of fatty acids to meet its energetic demands. The concentration of non-esterified fatty acids (NEFAs) increases and is associated with the development of insulin resistance in late-fasted pups. Furthermore, plasma NEFA concentrations respond differentially to an intravenous glucose tolerance test (ivGTT) depending on fasting duration, suggesting that the effects of glucose on lipid metabolism are altered. However, elucidation of the lipolytic mechanisms including lipase activity during prolonged fasting in mammals is scarce. To assess the impact of fasting and glucose on the regulation of lipid metabolism, adipose tissue and plasma samples were collected before and after ivGTTs performed on early (2 weeks, N=5) and late (6-8 weeks; N=8) fasted pups. Glucose administration increased plasma triglycerides and NEFA concentrations in late-fasted seals, but not plasma glycerol. Fasting decreased basal adipose lipase activity by 50%. Fasting also increased plasma lipase activity twofold and decreased the expressions of CD36, FAS, FATP1 and PEPCK-C by 22-43% in adipose tissue. Plasma acylcarnitine profiling indicated that late-fasted seals display higher incomplete LCFA β-oxidation. Results suggest that long-term fasting induces shifts in the regulation of lipolysis and lipid metabolism associated with the onset of insulin resistance in northern elephant seal pups. Delineation of the mechanisms responsible for this shift in regulation during fasting can contribute to a more thorough understanding of the changes in lipid metabolism associated with dyslipidemia and insulin resistance in mammals.
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103
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Hall M, Raven M, Rodriguez R, Brown J, Sporer K, Tangherlini N. 394 EMS-STARS: Emergency Medical Services Superuser Transport Association: A Retrospective Study. Ann Emerg Med 2012. [DOI: 10.1016/j.annemergmed.2012.06.426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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104
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Putora PM, Benz G, Rodriguez R, Brutsche M, Früh M. Tracheal granuloma pyogenicum with erlotinib treatment for lung cancer. Eur Respir J 2012; 38:1228-30. [PMID: 22045792 DOI: 10.1183/09031936.00008411] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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105
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Jaeger T, Zirbs M, Andres C, Gutermuth J, Ring J, Rodriguez R, Jochum W, Anliker MD. Lymphangitic carcinomatosis of colon carcinoma: a sign of poor prognosis. Clin Exp Dermatol 2012; 37:937-9. [PMID: 22681561 DOI: 10.1111/j.1365-2230.2012.04412.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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106
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Rodriguez R, Loske AM, Estevez M, Vargas S, Salazar R, Pacheco F, Vazquez-Carpizo J, Gamboa JM. Bio-packaged transponder MEMS implanted in rats. JOURNAL OF BIOMATERIALS SCIENCE. POLYMER EDITION 2012; 24:31-44. [PMID: 22304894 DOI: 10.1163/156856211x621097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A novel hydroxyapatite-based hybrid material with controlled porosity was designed as a bio-package to implant micro-electro-mechanical systems (MEMS) in living organisms. The biomaterial was prepared using synthetic stoichiometric hydroxyapatite powder reacted with a chemical-active, solvent-free, alkyd-based polyurethane. This porous material has interconnected pores with sizes between 100 and 350 μm and a pore volume fraction of 50%, fulfilling the requirements for implants. The biomaterial additionally has high wearing resistance and hydrolytic stability providing high endurance properties. The bio-package was characterized mechanically and morphologically using X-ray diffraction, scanning electron microscopy, densitometry, abrasion and mechanical tests. Twelve packaged micro-electro-mechanical systems were implanted subcutaneously into rats and tested for up to 9 months with good acceptance as revealed by the histological analysis performed on the soft tissue surrounding each implant.
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107
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Salardini A, Rodriguez R, Malaty I, Okun M, Fernandez H. Depressive Symptoms in Parkinson Disease as Measured by Beck's Depression Scale and Its Relationship to Visual Analogue Mood Scale, Motor Symptoms and the Quality of Life Measures (P06.057). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.p06.057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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108
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Salardini A, Rodriguez R, Malaty I, Okun M, Fernandez H. Clinical and Demographic Correlates of Antidepressant Utilisation in Parkinson's Disease Population (P04.035). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.p04.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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109
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Rodriguez R, Viscarra JA, Minas JN, Lee A, Nakano D, Nishiyama A, Ortiz RM. Decreased Pancreatic Insulin Secretion is associated with increased AT1 Activation during Glucose Supplementation in a Model of Metabolic Syndrome. FASEB J 2012. [DOI: 10.1096/fasebj.26.1_supplement.713.5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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110
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Viscarra JA, Rodriguez R, Vazquez-Medina JP, Champagne CD, Adams SH, Crocker DE, Ortiz RM. Decreased expression of adipose fatty acid transporters CD36 and FATP1 contributes to increased plasma free fatty acids during prolonged fasting in northern elephant seal pups. FASEB J 2012. [DOI: 10.1096/fasebj.26.1_supplement.886.10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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111
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Rodriguez R, Viscarra JA, Minas JN, Nakano D, Nishiyama A, Ortiz RM. Angiotensin receptor blockade increases pancreatic insulin secretion and decreases glucose intolerance during glucose supplementation in a model of metabolic syndrome. Endocrinology 2012; 153:1684-95. [PMID: 22355070 PMCID: PMC3320242 DOI: 10.1210/en.2011-1885] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Renin-angiotensin system blockade improves glucose intolerance and insulin resistance, which contribute to the development of metabolic syndrome. However, the contribution of impaired insulin secretion to the pathogenesis of metabolic syndrome is not well defined. To assess the contributions of angiotensin receptor type 1 (AT₁) activation and high glucose intake on pancreatic function and their effects on insulin signaling in skeletal muscle and adipose tissue, an oral glucose tolerance test (oGTT) was performed in five groups (n = 10/group) of rats: 1) lean strain-control 2) obese Otsuka Long-Evans Tokushima Fatty (OLETF), 3) OLETF + angiotensin receptor blocker (ARB; 10 mg/kg · d olmesartan for 6 wk; OLETF ARB), 4) OLETF + 5% glucose water (HG) for 6 wk (OLETF HG), and 5) OLETF + HG + ARB (OLETF HG/ARB). The glucose response to the oGTT increased 58% in OLETF compared with lean-strain control, whereas glucose supplementation increased it an additional 26%. Blockade of angiotensin receptor reduced the oGTT response 19% in the ARB-treated groups and increased pancreatic insulin secretion 64 and 113% in OLETF ARB and OLETF HG/ARB, respectively. ARB treatment in OLETF ARB and OLETF HG/ARB did not have an effect on insulin signaling proteins in skeletal muscle; however, it reduced pancreatic AT₁ protein expression 20 and 27%, increased pancreatic glucagon-like peptide-1 (GLP-1) receptor protein expression 41 and 88%, respectively, and increased fasting plasma GLP-1 approximately 2.5-fold in OLETF ARB. The results suggest that improvement of glucose intolerance is independent of an improvement in muscle insulin signaling, but rather by improved glucose-stimulated insulin secretion associated with decreased pancreatic AT₁ activation and increased GLP-1 signaling.
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MESH Headings
- Adipose Tissue/drug effects
- Adipose Tissue/metabolism
- Angiotensin II Type 1 Receptor Blockers/pharmacology
- Animals
- Blood Pressure/drug effects
- Dietary Supplements
- Disease Models, Animal
- Glucagon-Like Peptide-1 Receptor
- Glucose/administration & dosage
- Glucose/pharmacology
- Glucose Intolerance/metabolism
- Glucose Intolerance/prevention & control
- Insulin/metabolism
- Leptin/blood
- Male
- Metabolic Syndrome/metabolism
- Muscle, Skeletal/drug effects
- Muscle, Skeletal/metabolism
- Pancreas/metabolism
- Rats
- Rats, Inbred OLETF
- Rats, Inbred Strains
- Receptor, Angiotensin, Type 1/drug effects
- Receptor, Angiotensin, Type 1/metabolism
- Receptors, Glucagon/metabolism
- Triglycerides/blood
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112
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Popovich I, Rodriguez R, Viscarra J, Vasquez-Medina JP, Nishiyama A. AT1 blockade decreases NADPH oxidase 2 content and increases insulin signaling in a model of insulin resistance. FASEB J 2012. [DOI: 10.1096/fasebj.26.1_supplement.1057.19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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113
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Martinez B, Sonanez JG, Rodriguez R, Viscarra J, Vasquez-Medina JP, Ortiz RM. The Effects and function of the Hypothalamic‐pituitary‐thyroid axis on fasting Northern elephant seals. FASEB J 2012. [DOI: 10.1096/fasebj.26.1_supplement.lb709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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114
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Montez P, Max TA, Rodriguez R, Viscarra J, Vázquez-Medina JP, Nakano D, Nishiyama A, Ortiz RM. High Dietary Glucose Intake Increases Hepatic Triglyceride Content and Oxidative Stress: Contributions of Angiotensin Receptor. FASEB J 2012. [DOI: 10.1096/fasebj.26.1_supplement.714.8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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115
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Sood J, Balayan S, Minas JN, Rodriguez R, Aguil J, Nakano D, Nishiyama A, Awayda MS, Ortiz R. Enriched Cholesterol Diet Increases Expression of Renal Epithelial Na+ Channel Gamma Subunit in Rats. FASEB J 2012. [DOI: 10.1096/fasebj.26.1_supplement.867.19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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116
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McFeely E, Singh R, Richmond M, Zuckerman W, Lee T, Gilmore L, Rodriguez R, Chen J, Addonizio L. 20 The Effect of Oversizing Donor Cardiac Allografts on In-Hospital Outcomes in Pediatric Heart Transplant Recipients. J Heart Lung Transplant 2012. [DOI: 10.1016/j.healun.2012.01.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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117
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Rodriguez R, Roca A, Piñeiro B, Conangla G, Enero C, Ramos I, Valles V. P-1298 - Bilirubin and brief psychotic disorder. Eur Psychiatry 2012. [DOI: 10.1016/s0924-9338(12)75465-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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118
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Cincu R, Rodriguez R, Perez A, Blanco T, Arrotegui I, Barcia C. Solitary fibrous tumor of the thoracic spine. J Neurosci Rural Pract 2011; 1:118-9. [PMID: 21808519 PMCID: PMC3139340 DOI: 10.4103/0976-3147.71730] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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119
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de Castro J, Sevillano J, Marciniak J, Rodriguez R, González-Martín C, Viana M, Eun-suk OH, de Mouzon SH, Herrera E, Ramos MP. Implication of low level inflammation in the insulin resistance of adipose tissue at late pregnancy. Endocrinology 2011; 152:4094-105. [PMID: 21914778 PMCID: PMC3198999 DOI: 10.1210/en.2011-0068] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Insulin resistance is a characteristic of late pregnancy, and adipose tissue is one of the tissues that most actively contributes to the reduced maternal insulin sensitivity. There is evidence that pregnancy is a condition of moderate inflammation, although the physiological role of this low-grade inflammation remains unclear. The present study was designed to validate whether low-grade inflammation plays a role in the development of insulin resistance in adipose tissue during late pregnancy. To this end, we analyzed proinflammatory adipokines and kinases in lumbar adipose tissue of nonpregnant and late pregnant rats at d 18 and 20 of gestation. We found that circulating and tissue levels of adipokines, such as IL-1β, plasminogen activator inhibitor-1, and TNF-α, were increased at late pregnancy, which correlated with insulin resistance. The observed increase in adipokines coincided with an enhanced activation of p38 MAPK in adipose tissue. Treatment of pregnant rats with the p38 MAPK inhibitor SB 202190 increased insulin-stimulated tyrosine phosphorylation of the insulin receptor (IR) and IR substrate-1 in adipose tissue, which was paralleled by a reduction of IR substrate-1 serine phosphorylation and an enhancement of the metabolic actions of insulin. These results indicate that activation of p38 MAPK in adipose tissue contributes to adipose tissue insulin resistance at late pregnancy. Furthermore, the results of the present study support the hypothesis that physiological low-grade inflammation in the maternal organism is relevant to the development of pregnancy-associated insulin resistance.
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120
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Henriquez M, Guerrero C, Rodriguez R, Sabogal A, Sader G. The zygoma implant as anchorage for dental rehabilitation after partial mandibulectomy. Int J Oral Maxillofac Surg 2011. [DOI: 10.1016/j.ijom.2011.07.388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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121
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Mujica E, Rivera H, Rodriguez R, Fernandez M, Guerrero C. Midface degloving approach for tumors removal. Int J Oral Maxillofac Surg 2011. [DOI: 10.1016/j.ijom.2011.07.533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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122
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Rodriguez R, Guerrero C, Henriquez M, Ayala A. Binder's syndrome treatment: state of the art. Int J Oral Maxillofac Surg 2011. [DOI: 10.1016/j.ijom.2011.07.592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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123
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Guerrero C, Lopez P, Mujica E, Rodriguez R, Gonzalez M. 3-D maxillary Le Fort I level distraction osteogenesis in clefts. Int J Oral Maxillofac Surg 2011. [DOI: 10.1016/j.ijom.2011.07.1029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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124
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Rodriguez R, Mujica E, Del Valle S, Guerrero C. Poster 54: Connective Tissue Grafts in Orthognathic Surgery to Treat or Prevent Gingival Recessions. J Oral Maxillofac Surg 2011. [DOI: 10.1016/j.joms.2011.06.154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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125
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Moleron R, Sanchez P, Amaya E, Rodriguez R, Quintana A, De la Torre A. 3010 POSTER Feasibility and Acute Toxicity of Single Fraction Half-Body and Wide Pelvic Irradiation With Helical Tomotherapy. Eur J Cancer 2011. [DOI: 10.1016/s0959-8049(11)71083-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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