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Bhargava S, Jankowski J, Merckelbach E, Roth CE, Craveiro RB, Wolf M. Development, Establishment, and Validation of a Model for the Mineralization of Periodontium Remodelling Cells: Cementoblasts. Int J Mol Sci 2023; 24:13829. [PMID: 37762132 PMCID: PMC10531176 DOI: 10.3390/ijms241813829] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 09/04/2023] [Accepted: 09/06/2023] [Indexed: 09/29/2023] Open
Abstract
Chronic kidney disease (CKD) patients undergoing dialysis are at high risk of bone fractures. CKD-induced mineral and bone disorder is extended to periodontal disease due to changes in the ionic composition of saliva in CKD patients, dysregulating mineralization, hindering regeneration and thereby promoting the progression of dental complications. Despite the importance of cementum for overall oral health, the mechanisms that regulate its development and regeneration are not well comprehended, and a lack of sufficient in vitro experimental models has hindered research progress. In this study, the impact of experimental conditions on the calcification of cementoblasts was systematically investigated, aimed at establishing a standardized and validated model for the calcification of cementoblasts. The effects of phosphate, calcium, ascorbic acid, β-glycerolphosphate, dexamethasone, and fetal calf serum on the calcification process of cementoblasts were analyzed over a wide range of concentrations and time points by investigating calcium content, cell viability, gene expression and kinase activity. Cementoblasts calcified in a concentration- and time-dependent manner with higher concentrations of supplements cause a higher degree of calcification but decreased cell viability. Phosphate and calcium have a significantly stronger effect on cementoblast calcification processes compared to osteogenic supplements: ascorbic acid, β-glycerolphosphate, and dexamethasone induce calcification over a wide range of osteogenic signalling pathways, with osteopontin being a central target of gene regulation. Conversely, treatment with ascorbic acid, β-glycerolphosphate, and dexamethasone leads to activating only selected pathways, especially promoting bone sialoprotein expression. The developed and validated cementoblast calcification protocol, incubating up to 60% confluent cementoblasts with 1.9 mmol L-1 of phosphate supplementation for a reasonable, multi-pathway calcification induction and 10 mmol L-1 β-glycerolphosphate, 75 µmol L-1 ascorbic acid and 10 nmol L-1 dexamethasone for a reasonable osteogenic differentiation-based calcification induction, provides standard in vitro experimental models for better understanding cementoblast function and regeneration.
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Affiliation(s)
- Shruti Bhargava
- Institute of Molecular Cardiovascular Research, Medical Faculty, RWTH Aachen University, 52062 Aachen, Germany; (S.B.); (E.M.)
| | - Joachim Jankowski
- Institute of Molecular Cardiovascular Research, Medical Faculty, RWTH Aachen University, 52062 Aachen, Germany; (S.B.); (E.M.)
- Aachen-Maastricht Institute for Cardiorenal Disease (AMICARE), University Hospital RWTH Aachen, 52062 Aachen, Germany
- Experimental Vascular Pathology, Cardiovascular Research Institute Maastricht (CARIM), University of Maastricht, 6211 Maastricht, The Netherlands
| | - Erik Merckelbach
- Institute of Molecular Cardiovascular Research, Medical Faculty, RWTH Aachen University, 52062 Aachen, Germany; (S.B.); (E.M.)
| | - Charlotte Elisa Roth
- Department of Orthodontics, Dental Clinic, University of Aachen, Pauwelsstr. 30, 52074 Aachen, Germany; (C.E.R.); (R.B.C.); (M.W.)
| | - Rogerio Bastos Craveiro
- Department of Orthodontics, Dental Clinic, University of Aachen, Pauwelsstr. 30, 52074 Aachen, Germany; (C.E.R.); (R.B.C.); (M.W.)
| | - Michael Wolf
- Department of Orthodontics, Dental Clinic, University of Aachen, Pauwelsstr. 30, 52074 Aachen, Germany; (C.E.R.); (R.B.C.); (M.W.)
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Zask A, Gu Y, Albright JD, Du X, Hogan M, Levin JI, Chen JM, Killar LM, Sung A, DiJoseph JF, Sharr MA, Roth CE, Skala S, Jin G, Cowling R, Mohler KM, Barone D, Black R, March C, Skotnicki JS. Synthesis and SAR of bicyclic heteroaryl hydroxamic acid MMP and TACE inhibitors. Bioorg Med Chem Lett 2003; 13:1487-90. [PMID: 12668018 DOI: 10.1016/s0960-894x(03)00127-6] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.5] [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: 10/27/2022]
Abstract
Potent and selective bicyclic heteroaryl hydroxamic acid MMP and TACE inhibitors were synthesized by a novel convergent route. Selectivity and efficacy versus MMPs and TACE could be controlled by appropriate substitution on the scaffolds and by variation of the P1' group. Select compounds were found to be effective in in vivo models of arthritis.
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Affiliation(s)
- A Zask
- Wyeth-Ayerst Research, 401N. Middletown Road, Pearl River, NY 10965, USA.
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Darwish A, Roth CE, Duclos P, Ohn SA, Nassar A, Mahoney F, Vogt R, Arthur RR. Investigation into a cluster of infant deaths following immunization: evidence for methanol intoxication. Vaccine 2003; 20:3585-9. [PMID: 12297405 DOI: 10.1016/s0264-410x(02)00293-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [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: 11/30/2022]
Abstract
A cluster of infant deaths due to severe metabolic acidosis following immunization was reported in a prosperous farming village in Egypt. Fears that more deaths might occur, and of a deleterious effect on national immunization programs prompted an urgent investigation by national and international partners. The deaths, and other previously unrecognized illness following immunization, were associated with excessive topical application of methanol. Methanol was employed as an anti-pyretic and anti-inflammatory agent following injections. Fear of adverse reactions to vaccine had encouraged increasing use of methanol for these purposes. Local physicians and nurses were unaware of the toxicity of methanol and did not consider it in the differential diagnosis, and thus did not offer appropriate life-saving therapy. The interaction of traditional practices and modern medical interventions can have clinically important consequences, and should be considered when programs are introduced and as they are monitored.
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Affiliation(s)
- A Darwish
- Expanded Program on Immunization, Ministry of Health and Population, Cairo, Egypt
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Levin JI, Chen JM, Du MT, Nelson FC, Wehr T, DiJoseph JF, Killar LM, Skala S, Sung A, Sharr MA, Roth CE, Jin G, Cowling R, Di L, Sherman M, Xu ZB, March CJ, Mohler KM, Black RA, Skotnicki JS. The discovery of anthranilic acid-based MMP inhibitors. Part 3: incorporation of basic amines. Bioorg Med Chem Lett 2001; 11:2975-8. [PMID: 11677139 DOI: 10.1016/s0960-894x(01)00601-1] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [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: 11/21/2022]
Abstract
Anthranilic acid derivatives bearing basic amines were prepared and evaluated in vitro and in vivo as inhibitors of MMP-1, MMP-9, MMP-13, and TACE. Piperazine 4u has been identified as a potent, selective, orally active inhibitor of MMP-9 and MMP-13.
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Affiliation(s)
- J I Levin
- Wyeth-Ayerst Research, 401N. Middletown Rd., Pearl River, NY 10965, USA.
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Levin JI, Du MT, DiJoseph JF, Killar LM, Sung A, Walter T, Sharr MA, Roth CE, Moy FJ, Powers R, Jin G, Cowling R, Skotnicki JS. The discovery of anthranilic acid-based MMP inhibitors. Part 1: SAR of the 3-position. Bioorg Med Chem Lett 2001; 11:235-8. [PMID: 11206467 DOI: 10.1016/s0960-894x(00)00642-9] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.6] [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: 11/24/2022]
Abstract
A novel series of anthranilic acid-based inhibitors of MMP-1, MMP-9, and MMP-13 was prepared and evaluated both in vitro and in vivo. The most potent compound, 6e, has in vivo activity in a rat sponge-wrapped cartilage model.
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Affiliation(s)
- J I Levin
- Wyeth-Ayerst Research, Pearl River, NY 10965, USA.
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Mendelson GM, Roth CE, Wreghitt TG, Brown NM, Ziegler E, Lever AM. Nosocomial transmission of measles to healthcare workers. Time for a national screening and immunization policy for NHS staff? J Hosp Infect 2000; 44:154-5. [PMID: 10662570 DOI: 10.1053/jhin.1999.0667] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Crowcroft NS, Roth CE, Cohen BJ, Miller E. Guidance for control of parvovirus B19 infection in healthcare settings and the community. J Public Health Med 1999; 21:439-46. [PMID: 11469368 DOI: 10.1093/pubmed/21.4.439] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Interventions for parvovirus B19 infection need to balance the low risk of infection at a population level with the potential for serious adverse outcome for particular groups, notably the fetus, people with haemoglobinopathies and the immunocompromised. This guidance aims to assist the local decision-making process to be as evidence-based as the available evidence allows.
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Affiliation(s)
- N S Crowcroft
- Immunisation Division, Communicable Disease Surveillance Centre, London
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Levin JI, DiJoseph JF, Killar LM, Sung A, Walter T, Sharr MA, Roth CE, Skotnicki JS, Albright JD. The synthesis and biological activity of a novel series of diazepine MMP inhibitors. Bioorg Med Chem Lett 1998; 8:2657-62. [PMID: 9873598 DOI: 10.1016/s0960-894x(98)00473-9] [Citation(s) in RCA: 28] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A novel series of diazepine-based hydroxamic acid inhibitors of MMP-1, MMP-9, and MMP-13 were prepared and evaluated both in vitro and in vivo.
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Affiliation(s)
- J I Levin
- Wyeth-Ayerst Research, Pearl River, NY 10965, USA
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Gray JJ, Wreghitt TG, McKee TA, McIntyre P, Roth CE, Smith DJ, Sutehall G, Higgins G, Geraghty R, Whetstone R. Internal quality assurance in a clinical virology laboratory. II. Internal quality control. J Clin Pathol 1995; 48:198-202. [PMID: 7730475 PMCID: PMC502436 DOI: 10.1136/jcp.48.3.198] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [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: 01/26/2023]
Abstract
AIMS In April 1991 additional quality control procedures were introduced into the virology section of the Clinical Microbiology and Public Health Laboratory, Cambridge. Internal quality control (IQC) samples were gradually included in the serological assays performed in the laboratory and supplemented kit controls and standard sera. METHODS From April 1991 to December 1993, 2421 IQC procedures were carried out with reference sera. RESULTS The IQC samples were evaluated according to the Westgard rules. Violations were recorded in 60 of 1808 (3.3%) controls and were highest in the IQC samples of complement fixation tests (25/312 (8%) of controls submitted for complement fixation tests). CONCLUSIONS The inclusion of IQC samples in the serological assays performed in the laboratory has highlighted batch to batch variation in commercial assays. The setting of acceptable limits for the IQC samples has increased confidence in the validity of assay results.
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Affiliation(s)
- J J Gray
- Clinical Microbiology and Public Health Laboratory, Addenbrooke's Hospital, Cambridge
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Gray JJ, Wreghitt TG, McKee TA, McIntyre P, Roth CE, Smith DJ, Sutehall G, Higgins G, Geraghty R, Whetstone R. Internal quality assurance in a clinical virology laboratory. I. Internal quality assessment. J Clin Pathol 1995; 48:168-73. [PMID: 7745118 PMCID: PMC502399 DOI: 10.1136/jcp.48.2.168] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [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: 01/26/2023]
Abstract
AIMS In April 1991 an internal quality assessment scheme (IQAS) was introduced into the virology section of the Clinical Microbiology and Public Health Laboratory, Cambridge. The IQAS was established to identify recurring technical and procedural problems, to check the adequacy of current techniques, and to calculate the frequency of errors. METHODS Between April 1991 and December 1993, 715 anonymous clinical serum samples were submitted to the laboratory to test 3245 individual procedures of diagnostic viral serology. RESULTS A total of 485 (14.9%) procedural and 61 (1.9%) technical discrepancies were observed, the technical discrepancies mainly being recorded in complement fixation tests. Twenty two (0.7% of total procedures) of the technical discrepancies were diagnostically significant. CONCLUSIONS Evaluation criteria developed with the introduction of IQAS to viral serology, and technical and procedural discrepancies are assessed. As yet, IQAS has not been introduced to other sections of the diagnostic virology laboratory (virus isolation, electron microscopy, immunofluorescence, and enzyme linked immunosorbent assays for viral and chlamydial antigens).
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Affiliation(s)
- J J Gray
- Clinical Microbiology and Public Health Laboratory, Addenbrooke's Hospital, Cambridge
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McDaniel ML, Roth CE, Bry CA, Fink CJ, Swanson JA, Lacy PE. Effect of ethanol and n-butanol on alloxan inhibition of glucose-induced insulin release in isolated pancreatic islets. Biochem Pharmacol 1978; 27:1749-51. [PMID: 361044 DOI: 10.1016/0006-2952(78)90551-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Abstract
Ninhydrin, a compound which shares chemical properties strikingly similar to alloxan was found to mimic basically the inhibitory effect of alloxan on glucose-induced insulin release. Exposure of pancreatic islets for five minutes to 85 mumol/l ninhydrin produced approximately ninety percent inhibition of subsequent glucose-induced insulin release without altering basal secretion. Both D-glucose and D-mannose provided substantial protection against the inhibitory effect of ninhydrin, and the alpha anomer of D-glucose was more effective than the beta anomer in preventing ninhydrin inhibition of insulin release. Evidence for a common site of inhibition by ninhydrin and alloxan in the insulin release process is discussed.
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McDaniel ML, Weaver DC, Roth CE, Fink CJ, Swanson JA, Lacy PE. Characterization of the uptake of the methylxanthines theophylline and caffeine in isolated pancreatic islets and their effect on D-glucose transport. Endocrinology 1977; 101:1701-8. [PMID: 338288 DOI: 10.1210/endo-101-6-1701] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The uptake of theophylline and caffeine was determined in isolated pancreatic islets employing a dual isotope procedure with sucrose as an extracellular marker. Islets rapidly accumulated caffeine and theophylline with apparent dissociation constants of approximately 23 and 6 mM, respectively. Theophylline inhibited the uptake of caffeine and caused displacement of caffein from islets. These results indicated a competition by theophylline and caffeine for a common site (binding and/or transport carrier). In addition, theophylline and caffeine inhibited D-glucose transport in a dose-dependent manner and within the limits of the experimental system, this inhibition appeared to be non-competitive. (Bu)2cAMP under similar experimental conditions exerted no effect on D-glucose transport. These results present evidence for a rapid uptake of theophylline and caffeine in pancreatic islets, which is compatible with their immediate cellular effects. In addition, these results demonstrate a direct effect by theophylline and caffeine on D-glucose transport which appears independent of their ability to alter intracellular cAMP levels.
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McDaniel ML, Roth CE, Fink CJ, Lacy PE. Effect of anomers of D-glucose on alloxan inhibition of insulin release in isolated perifused pancreatic islets. Endocrinology 1976; 99:535-40. [PMID: 782855 DOI: 10.1210/endo-99-2-535] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The in vitro inhibition of insulin released by alloxan (20 mg/100 ml) in collagenase isolated rat islets is preferentially prevented by alpha D-glucose at a concentration of 1.0 mg/ml, while at a higher anomer concentration (1.5 mg/ml) both alpha and beta D-glucose provide equal protection. The ability of alpha D-glucose compared with beta D-glucose to stimulate insulin release, in vitro, showed a similar dose-related response, as observed in the alloxan protective studies. Although, both alpha and beta D-glucose compete with mutorated D-glucose for transport into islet cells, neither anomer produced a significantly different degree of inhibition in the transport process. The shared alpha stereospecificity for D-glucose in protection against alloxan and in stimulating insulin secretion in these in vitro studies, suggest a common site of interaction which may involve the beta-cell membrane.
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