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Meza I, Gonzalez-Estrella J, Burns PC, Rodriguez V, Velasco CA, Sigmon GE, Szymanowski JES, Forbes TZ, Applegate LM, Ali AMS, Lichtner P, Cerrato JM. Solubility and Thermodynamic Investigation of Meta-Autunite Group Uranyl Arsenate Solids with Monovalent Cations Na and K. Environ Sci Technol 2023; 57:255-265. [PMID: 36525634 PMCID: PMC10039619 DOI: 10.1021/acs.est.2c06648] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
We investigated the aqueous solubility and thermodynamic properties of two meta-autunite group uranyl arsenate solids (UAs). The measured solubility products (log Ksp) obtained in dissolution and precipitation experiments at equilibrium pH 2 and 3 for NaUAs and KUAs ranged from -23.50 to -22.96 and -23.87 to -23.38, respectively. The secondary phases (UO2)(H2AsO4)2(H2O)(s) and trögerite, (UO2)3(AsO4)2·12H2O(s), were identified by powder X-ray diffraction in the reacted solids of KUA precipitation experiments (pH 2) and NaUAs dissolution and precipitation experiments (pH 3), respectively. The identification of these secondary phases in reacted solids suggest that H3O+ co-occurring with Na or K in the interlayer region can influence the solubilities of uranyl arsenate solids. The standard-state enthalpy of formation from the elements (ΔHf-el) of NaUAs is -3025 ± 22 kJ mol-1 and for KUAs is -3000 ± 28 kJ mol-1 derived from measurements by drop solution calorimetry, consistent with values reported in other studies for uranyl phosphate solids. This work provides novel thermodynamic information for reactive transport models to interpret and predict the influence of uranyl arsenate solids on soluble concentrations of U and As in contaminated waters affected by mining legacy and other anthropogenic activities.
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Affiliation(s)
- Isabel Meza
- Department of Civil, Construction & Environmental Engineering, MSC01 1070, University of New Mexico, Albuquerque, New Mexico87131, United States
- Center for Water and the Environment, UNM, Albuquerque, New Mexico87131, United States
| | - Jorge Gonzalez-Estrella
- School of Civil and Environmental Engineering, College of Engineering, Architecture, and Technology, Oklahoma State University, Stillwater, Oklahoma74078, United States
| | - Peter C Burns
- Department of Civil and Environmental Engineering and Earth Sciences and Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana46556, United States
| | - Virginia Rodriguez
- Department of Civil and Environmental Engineering and Earth Sciences and Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana46556, United States
| | - Carmen A Velasco
- Department of Civil, Construction & Environmental Engineering, MSC01 1070, University of New Mexico, Albuquerque, New Mexico87131, United States
- Center for Water and the Environment, UNM, Albuquerque, New Mexico87131, United States
| | - Ginger E Sigmon
- Department of Civil and Environmental Engineering and Earth Sciences and Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana46556, United States
| | - Jennifer E S Szymanowski
- Department of Civil and Environmental Engineering and Earth Sciences and Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana46556, United States
| | - Tori Z Forbes
- Department of Chemistry, University of Iowa, Iowa City, Iowa52242, United States
| | - Lindsey M Applegate
- Department of Chemistry, University of Iowa, Iowa City, Iowa52242, United States
| | - Abdul-Mehdi S Ali
- Department of Earth and Planetary Sciences, MSC03 2040, University of New Mexico, Albuquerque, New Mexico87131, United States
| | - Peter Lichtner
- Center for Water and the Environment, UNM, Albuquerque, New Mexico87131, United States
| | - José M Cerrato
- Department of Civil, Construction & Environmental Engineering, MSC01 1070, University of New Mexico, Albuquerque, New Mexico87131, United States
- Center for Water and the Environment, UNM, Albuquerque, New Mexico87131, United States
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Velasco CA, Brearley AJ, Gonzalez-Estrella J, Ali AMS, Meza MI, Cabaniss SE, Thomson BM, Forbes TZ, Lezama Pacheco JS, Cerrato JM. From Adsorption to Precipitation of U(VI): What is the Role of pH and Natural Organic Matter? Environ Sci Technol 2021; 55:16246-16256. [PMID: 34797046 PMCID: PMC8680647 DOI: 10.1021/acs.est.1c05429] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
We investigated interfacial reactions of U(VI) in the presence of Suwannee River natural organic matter (NOM) at acidic and neutral pH. Laboratory batch experiments show that the adsorption and precipitation of U(VI) in the presence of NOM occur at pH 2 and pH 4, while the aqueous complexation of U by dissolved organic matter is favored at pH 7, preventing its precipitation. Spectroscopic analyses indicate that U(VI) is mainly adsorbed to the particulate organic matter at pH 4. However, U(VI)-bearing ultrafine to nanocrystalline solids were identified at pH 4 by electron microscopy. This study shows the promotion of U(VI) precipitation by NOM at low pH which may be relevant to the formation of mineralized deposits, radioactive waste repositories, wetlands, and other U- and organic-rich environmental systems.
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Affiliation(s)
- Carmen A Velasco
- Department of Civil, Construction and Environmental Engineering, MSC01 1070, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Adrian J Brearley
- Department of Earth and Planetary Sciences, MSC03 2040, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Jorge Gonzalez-Estrella
- School of Civil and Environmental Engineering, Oklahoma State University, Stillwater, Oklahoma 74078, United States
| | - Abdul-Mehdi S Ali
- Department of Earth and Planetary Sciences, MSC03 2040, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - María Isabel Meza
- Department of Civil, Construction and Environmental Engineering, MSC01 1070, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Stephen E Cabaniss
- Department of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Bruce M Thomson
- Department of Civil, Construction and Environmental Engineering, MSC01 1070, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Tori Z Forbes
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States
| | - Juan S Lezama Pacheco
- Department of Earth System Science, Stanford University, Stanford, California 94305, United States
| | - José M Cerrato
- Department of Civil, Construction and Environmental Engineering, MSC01 1070, University of New Mexico, Albuquerque, New Mexico 87131, United States
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El Hayek E, Medina S, Guo J, Noureddine A, Zychowski KE, Hunter R, Velasco CA, Wiesse M, Maestas-Olguin A, Brinker CJ, Brearley A, Spilde M, Howard T, Lauer FT, Herbert G, Ali AM, Burchiel S, Campen MJ, Cerrato JM. Uptake and Toxicity of Respirable Carbon-Rich Uranium-Bearing Particles: Insights into the Role of Particulates in Uranium Toxicity. Environ Sci Technol 2021; 55:9949-9957. [PMID: 34235927 PMCID: PMC8413144 DOI: 10.1021/acs.est.1c01205] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Particulate matter (PM) presents an environmental health risk for communities residing close to uranium (U) mine sites. However, the role of the particulate form of U on its cellular toxicity is still poorly understood. Here, we investigated the cellular uptake and toxicity of C-rich U-bearing particles as a model organic particulate containing uranyl citrate over a range of environmentally relevant concentrations of U (0-445 μM). The cytotoxicity of C-rich U-bearing particles in human epithelial cells (A549) was U-dose-dependent. No cytotoxic effects were detected with soluble U doses. Carbon-rich U-bearing particles with a wide size distribution (<10 μm) presented 2.7 times higher U uptake into cells than the particles with a narrow size distribution (<1 μm) at 100 μM U concentration. TEM-EDS analysis identified the intracellular translocation of clusters of C-rich U-bearing particles. The accumulation of C-rich U-bearing particles induced DNA damage and cytotoxicity as indicated by the increased phosphorylation of the histone H2AX and cell death, respectively. These findings reveal the toxicity of the particulate form of U under environmentally relevant heterogeneous size distributions. Our study opens new avenues for future investigations on the health impacts resulting from environmental exposures to the particulate form of U near mine sites.
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Affiliation(s)
- Eliane El Hayek
- Department of Chemistry and Chemical Biology, MSC03 2060, University of New Mexico, Albuquerque, New Mexico 87131, United States
- Department of Pharmaceutical Sciences, MSC09 5360, University of New Mexico, College of Pharmacy, Albuquerque, New Mexico 87131, United States
| | - Sebastian Medina
- Department of Pharmaceutical Sciences, MSC09 5360, University of New Mexico, College of Pharmacy, Albuquerque, New Mexico 87131, United States
- Department of Biology, New Mexico Highlands University, Las Vegas, New Mexico 87701, United States
| | - Jimin Guo
- Department of Chemical and Biological Engineering, MSC01 1120, University of New Mexico, Albuquerque, New Mexico 87131, United States
- Department of Internal Medicine, Molecular Medicine, MSC08 4720, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Achraf Noureddine
- Department of Chemical and Biological Engineering, MSC01 1120, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Katherine E Zychowski
- Department of Biobehavioral Health and Data Sciences, MSC09 5350, University of New Mexico College of Nursing, Albuquerque, New Mexico 87106, United States
| | - Russell Hunter
- Department of Pharmaceutical Sciences, MSC09 5360, University of New Mexico, College of Pharmacy, Albuquerque, New Mexico 87131, United States
| | - Carmen A Velasco
- Department of Civil Engineering, MSC01 1070, University of New Mexico, Albuquerque, New Mexico 87131, United States
- Chemical Engineering Faculty, Central University of Ecuador, Ciudad Universitaria, Ritter s/n & Bolivia, P.O. Box 17-01-3972, Quito 170129, Ecuador
| | - Marco Wiesse
- Department of Civil Engineering, MSC01 1070, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Angelea Maestas-Olguin
- Department of Chemical and Biological Engineering, MSC01 1120, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - C Jeffrey Brinker
- Department of Chemical and Biological Engineering, MSC01 1120, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Adrian Brearley
- Department of Earth and Planetary Sciences, MSC03 2040, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Michael Spilde
- Department of Earth and Planetary Sciences, MSC03 2040, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Tamara Howard
- Department of Cell Biology and Physiology, MSC08 4750, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Fredine T Lauer
- Department of Pharmaceutical Sciences, MSC09 5360, University of New Mexico, College of Pharmacy, Albuquerque, New Mexico 87131, United States
| | - Guy Herbert
- Department of Pharmaceutical Sciences, MSC09 5360, University of New Mexico, College of Pharmacy, Albuquerque, New Mexico 87131, United States
| | - Abdul Mehdi Ali
- Department of Earth and Planetary Sciences, MSC03 2040, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Scott Burchiel
- Department of Pharmaceutical Sciences, MSC09 5360, University of New Mexico, College of Pharmacy, Albuquerque, New Mexico 87131, United States
| | - Matthew J Campen
- Department of Pharmaceutical Sciences, MSC09 5360, University of New Mexico, College of Pharmacy, Albuquerque, New Mexico 87131, United States
| | - José M Cerrato
- Department of Civil Engineering, MSC01 1070, University of New Mexico, Albuquerque, New Mexico 87131, United States
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Wilson A, Velasco CA, Herbert GW, Lucas SN, Sanchez BN, Cerrato JM, Spilde M, Li QZ, Campen MJ, Zychowski KE. Mine-site derived particulate matter exposure exacerbates neurological and pulmonary inflammatory outcomes in an autoimmune mouse model. J Toxicol Environ Health A 2021; 84:503-517. [PMID: 33682625 PMCID: PMC8052313 DOI: 10.1080/15287394.2021.1891488] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
The Southwestern United States has a legacy of industrial mining due to the presence of rich mineral ore deposits. The relationship between environmental inhaled particulate matter (PM) exposures and neurological outcomes within an autoimmune context is understudied. The aim of this study was to compare two regionally-relevant dusts from high-priority abandoned mine-sites, Claim 28 PM, from Blue Gap Tachee, AZ and St. Anthony mine PM, from the Pueblo of Laguna, NM and to expose autoimmune-prone mice (NZBWF1/J). Mice were randomly assigned to one of three groups (n = 8/group): DM (dispersion media, control), Claim 28 PM, or St. Anthony PM, subjected to oropharyngeal aspiration of (100 µg/50 µl), once per week for a total of 4 consecutive doses. A battery of immunological and neurological endpoints was assessed at 24 weeks of age including: bronchoalveolar lavage cell counts, lung gene expression, brain immunohistochemistry, behavioral tasks and serum autoimmune biomarkers. Bronchoalveolar lavage results demonstrated a significant increase in number of polymorphonuclear neutrophils following Claim 28 and St. Anthony mine PM aspiration. Lung mRNA expression showed significant upregulation in CCL-2 and IL-1ß following St. Anthony mine PM aspiration. In addition, neuroinflammation was present in both Claim 28 and St. Anthony mine-site derived PM exposure groups. Behavioral tasks resulted in significant deficits as determined by Y-maze new arm frequency following Claim 28 aspiration. Neutrophil elastase was significantly upregulated in the St. Anthony mine exposure group. Interestingly, there were no significant changes in serum autoantigens suggesting systemic inflammatory effects may be mediated through other molecular mechanisms following low-dose PM exposures.
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Affiliation(s)
- Alexis Wilson
- Department of Pharmaceutical Sciences, University of New Mexico-Health Sciences Center, Albuquerque, New Mexico 87131
| | - Carmen A. Velasco
- Department of Civil, Construction & Environmental Engineering, University of New Mexico, Albuquerque, New Mexico 87131
- Department of Chemical Engineering, Universidad Central del Ecuador, Ritter s/n & Bolivia, Quito 17-01-3972, Ecuador
| | - Guy W. Herbert
- Department of Pharmaceutical Sciences, University of New Mexico-Health Sciences Center, Albuquerque, New Mexico 87131
| | - Selita N. Lucas
- Department of Pharmaceutical Sciences, University of New Mexico-Health Sciences Center, Albuquerque, New Mexico 87131
| | - Bethany N. Sanchez
- Department of Pharmaceutical Sciences, University of New Mexico-Health Sciences Center, Albuquerque, New Mexico 87131
| | - José M. Cerrato
- Department of Civil, Construction & Environmental Engineering, University of New Mexico, Albuquerque, New Mexico 87131
| | - Michael Spilde
- Department of Earth and Planetary Sciences, University of New Mexico, MSC03 2040, Albuquerque, New Mexico 87131
| | - Quan-Zhen Li
- Department of Immunology and Microarray Core, University of Texas Southwestern Medical Center, Dallas, TX 75390
| | - Matthew J. Campen
- Department of Pharmaceutical Sciences, University of New Mexico-Health Sciences Center, Albuquerque, New Mexico 87131
| | - Katherine E. Zychowski
- College of Nursing, University of New Mexico-Health Sciences Center, Albuquerque, New Mexico 87131
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Velasco CA, Artyushkova K, Ali AMS, Osburn CL, Gonzalez-Estrella J, Lezama-Pacheco JS, Cabaniss SE, Cerrato JM. Organic Functional Group Chemistry in Mineralized Deposits Containing U(IV) and U(VI) from the Jackpile Mine in New Mexico. Environ Sci Technol 2019; 53:5758-5767. [PMID: 30998849 PMCID: PMC6557721 DOI: 10.1021/acs.est.9b00407] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
We investigated the functional group chemistry of natural organic matter (NOM) associated with both U(IV) and U(VI) in solids from mineralized deposits exposed to oxidizing conditions from the Jackpile Mine, Laguna Pueblo, NM. The uranium (U) content in unreacted samples was 0.44-2.6% by weight determined by X-ray fluorescence. In spite of prolonged exposure to ambient oxidizing conditions, ≈49% of U(IV) and ≈51% of U(VI) were identified on U LIII edge extended X-ray absorption fine structure spectra. Loss on ignition and thermogravimetric analyses identified from 13% to 44% of NOM in the samples. Carbonyl, phenolic, and carboxylic functional groups in the unreacted samples were identified by fitting of high-resolution X-ray photoelectron spectroscopy (XPS) C 1s and O 1s spectra. Peaks corresponding to phenolic and carbonyl functional groups had intensities higher than those corresponding to carboxylic groups in samples from the supernatant from batch extractions conducted at pH 13, 7, and 2. U(IV) and U(VI) species were detected in the supernatant after batch extractions conducted under oxidizing conditions by fitting of high-resolution XPS U 4f spectra. The outcomes from this study highlight the importance of the influence of pH on the organic functional group chemistry and U speciation in mineralized deposits.
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Affiliation(s)
- Carmen A. Velasco
- Department of Civil, Construction & Environmental Engineering, MSC01 1070, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Kateryna Artyushkova
- Department of Chemical and Biological Engineering, MSC01 1120, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Abdul-Mehdi S. Ali
- Department of Earth and Planetary Sciences, MSC03 2040, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Christopher L. Osburn
- Department of Marine, Earth, and Atmospheric Sciences, North Carolina State University, Raleigh, North Carolina 27607, United States
| | - Jorge Gonzalez-Estrella
- Department of Civil, Construction & Environmental Engineering, MSC01 1070, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Juan S. Lezama-Pacheco
- Department of Environmental Earth System Science, Stanford University, Stanford, California 94305, United States
| | - Stephen E. Cabaniss
- Department of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - José M. Cerrato
- Department of Civil, Construction & Environmental Engineering, MSC01 1070, University of New Mexico, Albuquerque, New Mexico 87131, United States
- Corresponding Author. Telephone: (001) (505) 277-0870. Fax: (001) (505) 277-1918
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Camerini-Davalos RA, Bloodworth JM, Velasco CA, Reddi AS. Effect of insulin-glipizide combination on skeletal muscle capillary basement membrane width in diabetic patients. Clin Ther 1994; 16:952-61. [PMID: 7697692] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
This study investigated the long-term effect of insulin or the combination of insulin and an oral hypoglycemic compound (glipizide) on the skeletal muscle capillary basement membrane width in insulin-requiring diabetic patients. Seventy diabetic patients were randomized to treatment with either insulin-placebo or insulin-glipizide (5 mg/d) for 3 years. Of these, only 61 patients completed the study; 27 patients received insulin-placebo and 34 patients received insulin-glipizide. Three skeletal muscle (quadriceps femoris) biopsies were performed in all patients over a 3-year period. Glycosylated hemoglobin A1 was determined every 100 +/- 20 days, including plasma glucose levels. Muscle capillary basement membrane width was quantitated by a previously described method. After approximately 16 months, glycosylated hemoglobin A1 decreased significantly in each group from its baseline (P < 0.001 insulin-glipizide group and P < 0.025 insulin-placebo), although no statistically significant difference was seen between the two groups. After 3 years this decrease was statistically significant (P < 0.001) only in the insulin-glipizide group. At baseline, no statistically significant difference was found in the muscle capillary basement membrane width between the two groups. In spite of the significant decrease in glycosylated hemoglobin A1 in both groups after 14 to 16 months, only muscle capillary basement membrane width in the insulin-glipizide group decreased significantly compared with baseline. Patients receiving insulin-placebo showed a gradual increase in the muscle capillary basement membrane width, which after 3 years was significantly higher than baseline (P < 0.02). Although the mechanisms by which the addition of glipizide to insulin treatment reduced the thickening of the muscle capillary basement membrane are not clearly understood, the current findings suggest that diabetic microangiopathy is not necessarily progressive and that prophylaxis may be attained.
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Reddi AS, Velasco CA, Reddy PR, Khan MY, Camerini-Davalos RA. Diabetic microangiopathy in KK mice. VI. Effect of glycemic control on renal glycoprotein metabolism and established glomerulosclerosis. Exp Mol Pathol 1990; 53:140-51. [PMID: 2148155 DOI: 10.1016/0014-4800(90)90038-f] [Citation(s) in RCA: 8] [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] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Twenty-three nonobese KK mice with abnormal tolerance to glucose, hyperinsulinemia with insulin resistance and human diabetic-like nephropathy were treated with either saline (12 mice) or glipizide, an oral hypoglycemic compound, 1 mg/kg, (11 mice) from 120 to 360 days of age. These mice develop significant increases in mesangial volume and matrix by 40 days of age. Oral glucose tolerance (OGTT), glucosyltransferase and N-acetyl-beta-glucosaminidase (enzymes involved in synthesis and degradation of kidney glycoproteins, respectively) in the kidney and serum, 24-hr proteinuria, and light microscopy studies of the kidney were performed. Glipizide-treated mice improved their OGTT. There was no difference in body weight; however, a 16% decrease (P less than 0.05) in kidney weight was observed in glipizide-treated mice. Both enzymes were significantly increased in the kidneys of mice treated with glipizide. No difference in serum enzymes was found between the two groups of mice. About 58% of the saline-treated mice had moderate glomerulosclerosis. By contrast, only 27% of glipizide-treated mice had moderate glomerulosclerosis. Also, a significant decrease in proteinuria was found in glipizide-treated mice. These data suggest that glipizide improves glucose metabolism, decreases kidney size, prevents kidney glycoprotein and mesangial matrix accumulation, and reduces proteinuria in type II diabetic KK mice. This indicates that good glycemic control prevents further progression of established diabetic nephropathy in animals.
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Affiliation(s)
- A S Reddi
- Department of Medicine, UMD-New Jersey Medical School, Newark 07103-2757
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Abstract
Three muscle biopsies were performed in 53 overt type 2 diabetics over a period of approximately 2 years. At baseline, 21 (40%) had an increased capillary basement membrane width in muscle. Thirty-five patients received glipizide and 18 received placebo. In the patients receiving placebo, the mean of the muscle capillary basement membrane width increased from 158.7 +/- 11.5 nm (SEM) to 170.9 +/- 14.7 nm (P = NS), but in those receiving glipizide the value decreased from 192.9 +/- 13.2 nm to 161.0 +/- 10.2 nm (P = 0.02). Plasma glucose and glycosylated hemoglobin A1 decreased significantly (P less than 0.001) after 2 years in patients receiving glipizide. In 15, mean glycosylated hemoglobin A1 reached a normal range, and mean basement membrane width decreased to a level close to that found in subjects without diabetes (P = NS). These findings are consistent with the hypothesis that effective response to oral medication can decrease the basement membrane thickening, suggesting that diabetic microangiopathy is not necessarily progressive.
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Abstract
Three muscle biopsies were performed in 53 overt type II diabetics over a period of approximately 2 years. At baseline, 21 (40%) had an abnormally increased capillary basement membrane width in muscle. Thirty-five subjects received glipizide and 18, placebo. At baseline, no statistically significant difference was found in the muscle capillary basement membrane width between the two groups (P = NS). In the subjects receiving placebo, the mean width of the muscle capillary basement membrane increased (P = NS), but in those receiving glipizide, the mean decreased from 193 +/- 13 nm (SEM) to 161 +/- 10 nm (P = .02). Fasting plasma glucose and glycosylated hemoglobin A1 significantly decreased (P less than .001) after two years in those receiving glipizide. In 15 subjects, mean glycosylated hemoglobin A1 reached the normal range, and mean muscle capillary basement membrane width decreased to a level close to that found in subjects without diabetes (P = NS). Determinations of enzyme activities involved in the synthesis and degradation of glycoproteins revealed a 2-year significant decrease of muscle glucosyltransferase (synthesis) activity (P less than .01) in the glipizide-treated subjects as opposed to a significant increase (P less than .001) in those receiving placebo. Muscle N-acetyl-beta-glucosaminidase activity (degradation) was statistically increased (P less than .001) in those subjects taking glipizide, but decreased in those taking placebo (P less than .001).
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Camerini-Davalos RA, Reddi AS, Bloodworth JM, Velasco CA. Microchannels in prediabetes. Adv Exp Med Biol 1988; 246:197-203. [PMID: 3250254 DOI: 10.1007/978-1-4684-5616-5_24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- R A Camerini-Davalos
- Department of Medicine, New York Medical College, Metropolitan Hospital Center, New York
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Camerini-Davalos RA, Reddi AS, Wehner H, Velasco CA. Kidney disease in KK mice: effect of insulin. Adv Exp Med Biol 1988; 246:333-7. [PMID: 3074664 DOI: 10.1007/978-1-4684-5616-5_41] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- R A Camerini-Davalos
- Department of Medicine, New York Medical College, Metropolitan Hospital Research Center, New York
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Reddi AS, Velasco CA, Khan MY, Bloodworth JM, Camerini-Davalos RA. Kidney disease in KK mice: effect of glipizide. Adv Exp Med Biol 1988; 246:305-12. [PMID: 3250259 DOI: 10.1007/978-1-4684-5616-5_37] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- A S Reddi
- Department of Medicine, UMDNJ-New Jersey Medical School, Newark
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Camerini-Davalos RA, Reddi AS, Cole HS, Velasco CA. Abnormal response to glucose in the prehyperglycemic stage. Adv Exp Med Biol 1988; 246:159-65. [PMID: 3250253 DOI: 10.1007/978-1-4684-5616-5_19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- R A Camerini-Davalos
- Department of Medicine, New York Medical College, Metropolitan Hospital Research Center, New York
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Abstract
Forty-one patients with chemical diabetes had three oral glucose tolerance tests and underwent muscle biopsy three times over a period of three years. Twenty-three received glipizide and 18 placebo. Those taking placebo had an increase in the mean muscle capillary basement membrane width (p = 0.01), but those taking glipizide showed a decrease (p = 0.01) to values no different from those of nondiabetic subjects. Determinations of enzyme activities involved in the synthesis and degradation of glycoproteins revealed a three-year decrease (not significant) in muscle glucosyltransferase activity in the glipizide-treated patients, but a statistically significant difference (p less than 0.01) comparing the adjusted means of the two treatment groups. N-acetyl-beta-glucosaminidase activity was significantly increased in muscle from baseline values (p less than 0.01), with adjusted means also significantly different (p less than 0.01). The data suggest that changes in basement membrane and enzyme activities are correlated, and the latter may be a predictor to follow the development, progression, or regression of diabetic vasculopathy.
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Reddi AS, Oppermann W, Velasco CA, Camerini-Davalos RA. Diabetic microangiopathy in KK mice. II. Suppression of Glomerulosclerosis by pyridinolcarbamate. Exp Mol Pathol 1977; 26:325-39. [PMID: 852540 DOI: 10.1016/0014-4800(77)90060-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Reddi AS, Oppermann W, Reddy MP, Velasco CA, Camerini-Davalos RA. Elevated kidney glucosyltransferase activity in genetic prediabetic mice. Experientia 1976; 32:1237-8. [PMID: 976428 DOI: 10.1007/bf01953068] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Glucosyltransferase activity in the renal cortex of genetic diabetic KK mice was significantly increased at 40 days of age when compared to that of Swiss albino and F1 hybrid mice. This increase in enzyme activity in the absence of glucose intolerance can be regarded as an earlier genetic marker for the diagnosis of diabetic microangiopathy.
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Velasco CA, Cole HS, Camerini-Davalos RA. Radioimmunoassay of insulin, with use of an immunosorbent. Clin Chem 1974; 20:700-2. [PMID: 4830176] [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: 01/12/2023]
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Cole HS, Kim HS, Zelson C, Velasco CA. [Neonatal diabetes mellitus]. Acta Diabetol Lat 1973; 10:283-92. [PMID: 4582428] [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: 01/11/2023]
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Cole HS, Kim HS, Zelson C, Velasco CA. Neonatal diabetes mellitus. Acta Diabetol Lat 1973; 10:283-92. [PMID: 4744225] [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: 01/12/2023]
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Velasco CA, Oppermann W, Camerini-Davalos RA. Critical variables in the radioimmunological technique for measuring immunoreactive insulin with use of immunosorbents. Clin Chem 1973; 19:201-4. [PMID: 4567371] [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: 01/11/2023]
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