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Richter GM, Wagner G, Reichenmiller K, Staufenbiel I, Martins O, Löscher BS, Holtgrewe M, Jepsen S, Dommisch H, Schaefer AS. Exome Sequencing of 5 Families with Severe Early-Onset Periodontitis. J Dent Res 2021; 101:151-157. [PMID: 34515563 PMCID: PMC8807999 DOI: 10.1177/00220345211029266] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Periodontitis is characterized by alveolar bone loss leading to tooth loss. A small proportion of patients develop severe periodontitis at the juvenile or adolescent age without exposure to the main risk factors of the disease. It is considered that these cases carry rare variants with large causal effects, but the specific variants are largely unknown. In this study, we performed exome sequencing of 5 families with children who developed stage IV, grade C, periodontitis between 3 and 18 y of age. In 1 family, we found compound heterozygous variants in the gene CTSC (p.R272H, p.G139R), 1 of which was previously identified in a family with prepubertal periodontitis. Subsequent targeted resequencing of the CTSC gene in 24 patients <25 y of age (stage IV, grade C) identified the known mutation p.I453V (odds ratio = 4.06, 95% CI = 1.6 to 10.3, P = 0.001), which was previously reported to increase the risk for adolescent periodontitis. An affected sibling of another family carried a homozygous deleterious mutation in the gene TUT7 (p.R560Q, CADD score >30 [Combined Annotation Dependent Depletion]), which is implicated in regulation of interleukin 6 expression. Two other affected siblings shared heterozygous deleterious mutations in the interacting genes PADI1 and FLG (both CADD = 36), which contribute to the integrity of the environment-tissue barrier interface. Additionally, we found predicted deleterious mutations in the periodontitis risk genes ABCA1, GLT6D1, and SIGLEC5. We conclude that the CTSC variants p.R272H and p.I453V have different expressivity and diagnostic relevance for prepubertal and adolescent periodontitis, respectively. We propose additional causal variants for early-onset periodontitis, which also locate within genes that carry known susceptibility variants for common forms. However, the genetic architecture of juvenile periodontitis is complex and differs among the affected siblings of the sequenced families.
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Affiliation(s)
- G M Richter
- Department of Periodontology and Synoptic Dentistry, Institute for Dental and Craniofacial Sciences, Charité-University Medicine Berlin, Berlin, Germany
| | - G Wagner
- Department of Periodontology, Operative and Preventive Dentistry, University of Bonn, Bonn, Germany
| | | | - I Staufenbiel
- Department of Conservative Dentistry, Periodontology and Preventive Dentistry, Hannover Medical School, Hannover, Germany
| | - O Martins
- Institute of Periodontology, Department of Dentistry, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - B S Löscher
- Institute of Clinical Molecular Biology, Christian-Albrechts-University Kiel and University Hospital Schleswig-Holstein, Kiel, Germany
| | - M Holtgrewe
- Core Unit Bioinformatics-CUBI, Berlin Institute of Health, Charité-University Medicine Berlin, Berlin, Germany
| | - S Jepsen
- Department of Periodontology, Operative and Preventive Dentistry, University of Bonn, Bonn, Germany
| | - H Dommisch
- Department of Periodontology and Synoptic Dentistry, Institute for Dental and Craniofacial Sciences, Charité-University Medicine Berlin, Berlin, Germany
| | - A S Schaefer
- Department of Periodontology and Synoptic Dentistry, Institute for Dental and Craniofacial Sciences, Charité-University Medicine Berlin, Berlin, Germany
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Odjegba EE, Idowu OA, Ikenweiwe NB, Martins O, Sadeeq AY. Public Perception of Potable Water Supply in Abeokuta South west, Nigeria. ACTA ACUST UNITED AC 2015. [DOI: 10.4314/jasem.v19i1.1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Silva D, Martins O, Matos S, Lopes P, Rolo T, Baptista I. Histological and profilometric evaluation of the root surface after instrumentation with a new piezoelectric device - ex vivo study. Int J Dent Hyg 2014; 13:138-44. [PMID: 24995862 DOI: 10.1111/idh.12091] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/30/2014] [Indexed: 11/26/2022]
Abstract
OBJECTIVES An ex vivo model was designed to profilometrically and histologically assess root changes resulting from scaling with a new ultrasonic device, designed for bone piezoelectric surgery, in comparison with curettes. METHODS Three groups of 10 periodontal hopeless teeth were each subjected to different root instrumentation: Gracey curettes (CUR); ultrasonic piezoelectric device, Perio 100% setting, level 8 (P100); and ultrasonic piezoelectric device Surg 50% setting, level 1 (S50). After extraction, all teeth were photographed to visually assess the presence of dental calculus. The treated root surfaces were profilometrically evaluated (Ra, Rz, Rmax). Undecalcified histological sections were prepared to assess qualitative changes in cementum thickness. Statistical analysis was carried out using one-way anova test with a significance level of 95%. RESULTS Both instruments proved to be effective in the complete removal of calculus. The CUR group presented the lowest Ra [2.28 μm (±0.58)] and S50 the highest [3.01 μm (±0.61)]. No statistically significant differences were detected among the three groups, for Ra, Rz and Rmax. Histologically, there was a cementum thickness reduction in all groups, being higher and more irregular in S50 group. CONCLUSIONS Within the limits of this study, there were no statistically significant differences in roughness parameters analyzed between curettes and the ultrasonic piezoelectric unit. This new instrument removes a smaller amount of cementum, mainly at the Perio 100% power setting, which appears to be the least damaging. The ultrasonic device is effective in calculus removal, proving to be as effective as curettes.
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Affiliation(s)
- D Silva
- Faculty of Medicine, Department of Dentistry, University of Coimbra, Coimbra, Portugal
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Artigas L, Otero E, Paranhos R, Gómez M, Piccini C, Costagliola M, Silva R, Suárez P, Gallardo V, Hernández-Becerril D, Chistoserdov A, Vieira R, Perez- Cenci M, Ternon J, Beker B, Thyssen M, Dionisi H, Do Rosario Marinho-Jaussaud I, Gonzalez A, Hurtado C, Parra J, Alonso C, Hozbor C, Peressutti S, Negri R, Espinoza C, Cardoso A, Martins O, Covacevich F, Berón C, Salerno G. Towards a Latin American and Caribbean international census of marine microbes (LACar ? ICoMM): overview and discussion on some current research directions. REV BIOL TROP 2007. [DOI: 10.15517/rbt.v56i0.5587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Akaishi E, Massumoto CM, Mizumoto N, Teixeira F, Coimbra A, Miyadahira E, Martins O, Buzaid AC. Cytoreductive surgery combined with perioperative intraperitoneal chemotherapy for the management of peritoneal carcinomatosis. Initial experience of a cancer center in Brazil. J Clin Oncol 2005. [DOI: 10.1200/jco.2005.23.16_suppl.2112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Curnow AW, Hong KW, Yuan R, Kim SI, Martins O, Winkler W, Henkin TM, Söll D. Glu-tRNAGln amidotransferase: a novel heterotrimeric enzyme required for correct decoding of glutamine codons during translation. Proc Natl Acad Sci U S A 1997; 94:11819-26. [PMID: 9342321 PMCID: PMC23611 DOI: 10.1073/pnas.94.22.11819] [Citation(s) in RCA: 233] [Impact Index Per Article: 8.6] [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: 02/05/2023] Open
Abstract
The three genes, gatC, gatA, and gatB, which constitute the transcriptional unit of the Bacillus subtilis glutamyl-tRNAGln amidotransferase have been cloned. Expression of this transcriptional unit results in the production of a heterotrimeric protein that has been purified to homogeneity. The enzyme furnishes a means for formation of correctly charged Gln-tRNAGln through the transamidation of misacylated Glu-tRNAGln, functionally replacing the lack of glutaminyl-tRNA synthetase activity in Gram-positive eubacteria, cyanobacteria, Archaea, and organelles. Disruption of this operon is lethal. This demonstrates that transamidation is the only pathway to Gln-tRNAGln in B. subtilis and that glutamyl-tRNAGln amidotransferase is a novel and essential component of the translational apparatus.
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Affiliation(s)
- A W Curnow
- Department of Molecular Biophysics, Yale University, New Haven, CT 06520-8114, USA
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Kim SI, Stange-Thomann N, Martins O, Hong KW, Söll D, Fox TD. A nuclear genetic lesion affecting Saccharomyces cerevisiae mitochondrial translation is complemented by a homologous Bacillus gene. J Bacteriol 1997; 179:5625-7. [PMID: 9287027 PMCID: PMC179443 DOI: 10.1128/jb.179.17.5625-5627.1997] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
A novel Bacillus gene was isolated and characterized. It encodes a homolog of Saccharomyces cerevisiae Pet112p, a protein that has no characterized relative and is dispensable for cell viability but required for mitochondrial translation. Expression of the Bacillus protein in yeast, modified to ensure mitochondrial targeting, partially complemented the phenotype of the pet112-1 mutation, demonstrating a high degree of evolutionary conservation for this as yet unidentified component of translation.
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Affiliation(s)
- S I Kim
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, Connecticut 06520-8114, USA
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Carrick JB, Martins O, Snider CC, Means ND, Enderson BL, Frame SB, Morris SA, Karlstad MD. The effect of LPS on cytokine synthesis and lung neutrophil influx after hepatic ischemia/reperfusion injury in the rat. J Surg Res 1997; 68:16-23. [PMID: 9126190 DOI: 10.1006/jsre.1997.4998] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
OBJECTIVE To determine if cytokine responses and lung injury induced by intravenous (i.v.) lipopolysaccharide (LPS) at 4 hr were enhanced in rats that had been previously subjected to 30 min of total liver ischemia (Pringle's maneuver) followed by 24 hr or 3 days of reperfusion. BACKGROUND Many patients with liver trauma require occlusion of hepatic blood flow to control hemorrhage and facilitate repair. A significant number of these patients subsequently develop the systemic inflammatory response syndrome (SIRS) and multiple organ dysfunction (MOD) characterized by the release of cytokines and tissue neutrophil influx. Macrophages, including Kupffer cells, may be activated by ischemic injury and dysregulation of their response to LPS may contribute to the development of SIRS and acute respiratory distress syndrome. METHODS Adult male Sprague-Dawley rats were randomly divided into six groups: three groups received total hepatic ischemia for 30 min and three groups had a sham procedure. Twenty-four hours or 3 days after hepatic ischemia/reperfusion injury, rats were treated with LPS (5 mg/kg) or saline and monitored for 4 hr. We collected serum, bronchoalveolar lavage (BAL) fluid, and lung tissue. RESULTS Serum and BAL cytokine concentrations were significantly increased by i.v. LPS; however, hepatic ischemia/reperfusion injury 24 hr or 3 days before iv LPS ameliorated this cytokine response. The LPS-induced pulmonary neutrophil influx and histopathological changes were similar in sham and hepatic ischemia/reperfusion-injured groups. CONCLUSIONS Hepatic ischemia/reperfusion injury significantly attenuated the serum and BAL cytokine concentrations, but did not change pulmonary neutrophil influx or histopathological alterations in response to i.v. LPS.
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Affiliation(s)
- J B Carrick
- Department of Anesthesiology, Graduate School of Medicine, University of Tenneesee Medical Center, Knoxville 37920, USA
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Porto G, Vicente C, Teixeira MA, Martins O, Cabeda JM, Lacerda R, Goncalves C, Fraga J, Macedo G, Silva BM, Alves H, Justiça B, de Sousa M. Relative impact of HLA phenotype and CD4-CD8 ratios on the clinical expression of hemochromatosis. Hepatology 1997; 25:397-402. [PMID: 9021953 DOI: 10.1002/hep.510250223] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Hemochromatosis is a hereditary iron-overload disease linked to HLA. The clinical expression of hemochromatosis is influenced by sex and age. However, other factors must account for the notorious heterogeneity of expression of the disease independent of sex, age, and HLA phenotype. The present study attempts to clarify some of these additional factors based on exhaustive statistical analysis of data collected from 43 selected patients with hemochromatosis. The statistical analysis focused on three groups of variables: the first group included variables reflecting the clinical expression of the disease; the second group represented the biochemical and hematological values at the time of diagnosis; and the third group consisted of the independent variables sex, age, HLA phenotype, and T-cell subset profile, i.e., the percentages and total numbers of CD4+ and CD8+ cells and the CD4-CD8 ratios. The results show that the relative expansion of the two main T-cell subsets, in the context of the HLA phenotype, correlates significantly with the clinical expression of hemochromatosis and the severity of iron overload. The present findings substantiate further the postulate that T cells have a role in the regulation of iron metabolism.
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Affiliation(s)
- G Porto
- Department of Molecular Pathology and Immunology, Abel Salazar Institute for the Biomedical Sciences, Porto, Portugal
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Martins O. [The imaging diagnosis of craniocerebral trauma. The general concepts]. ACTA MEDICA PORT 1994; 7:319-27. [PMID: 8073909] [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: 01/28/2023]
Abstract
The author makes a concise review of the imagiology of acute head trauma. The relative value of the various imaging techniques and the present importance of skull radiography are discussed; the role of computed tomography (CT) is emphasized. The most important aspects of traumatic lesions, as evaluated by CT, are presented.
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Affiliation(s)
- O Martins
- Serviço de Imagiologia, Hospital de São Francisco Xavier, Lisboa
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Nok AJ, Esievo KA, Ukoha AI, Ikediobi CO, Ibrahim S, Martins O, Tekdek B, Omage J. Brain Na+ K+ ATPase and cholesterol in acute experimental trypanosomiasis. Cell Biochem Funct 1992; 10:233-6. [PMID: 1335378 DOI: 10.1002/cbf.290100404] [Citation(s) in RCA: 2] [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: 12/26/2022]
Abstract
Brain Na+ K+ ATPase activity has been found to decrease in experimental trypanosomiasis in rats infected with Trypanosoma congolense. Some physical features that affect membrane fluidity were also observed to be altered. The levels of cholesterol in the brain and free fatty acids in the serum were found to increase in the infected animals. These findings might be relevant to the development of brain lesions.
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Affiliation(s)
- A J Nok
- Department of Biochemistry, Ahmadu Bello University, Zaria, Nigeria
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Abstract
We report one patient who developed two squamous-cell carcinomas on different parts of the lower lip. The tumors were excised by the UV technique, a variation of the V-shped excision. We repaired the defect caused by excision of the first lesion by direct closure and that caused by extirpation of the second lesion by use of a transposition flap (Abbe-Estlander technique).
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Bianco AC, Nunes MT, Martins O, Roesner I, Douglas RA, Pereira RC, Douglas CR. Possible mechanism of action of cholesterol enriched diet on the thyroid. Endocrinol Exp 1981; 15:277-85. [PMID: 6976263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Groups of male Sprague Dawley rats aged 60 days were fed either a control diet (CD) or the same diet enriched with 1% cholesterol (CHD) for 30 days. In CHD fed animals an increase of 131I uptake by thyroid, PB131I and TSH level in plasma was found, while the level of thyroxine (T4) was unchanged and that of triiodothyronine (T3) was decreased. In the animals treated with T3 (20 micrograms i.p. daily) a decrease of 131I uptake by thyroid and of T4 and TSH level in plasma was found irrespectively of a cholesterol content in the diet. However, PB131I level was decreased in CHD fed and T3 treated animals compared to those fed CD under the same treatment. Finally, in the animals treated with cimetidine (10 mg i.p. daily) no changes of any measure was found after CD feeding as compared to untreated ones, while CHD in such animals resulted in a decreased of T3 level. The site of cholesterol action appears to be at the hypothalamus-pituitary system since TSH suppressed animals (i.e. T3 treated) did not show any thyroid stimulation when fed with a cholesterol excess. Furthermore, thyroidectomized animals showed increased TSH in plasma after cholesterol feeding. In the present study, chronic administration of cimetidine completely abolished thyroid gland stimulation promoted by cholesterol feeding thus suggesting that central histamine may play a considerable role in this process.
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da Rosa JF, Martins O, do Rosário Filho NA, Akel R, Baptistini Junior O. [Chondromanubrial prominence. Report of 3 cases and presentation of a new technic for surgical correction]. AMB Rev Assoc Med Bras 1981; 27:315-8. [PMID: 6981129] [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: 01/22/2023]
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Picoto ADS, Martins O, Verde F, de Oliveira A. [Cryosurgery in dermatology. I. Basic principles]. Actas Dermosifiliogr 1981; 72:5-12. [PMID: 7257900] [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: 01/24/2023] Open
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Nobre G, Oliveira ADS, Verde SF, Martins O, Picoto ADS. Chromomycosis: report of a case and management by cryosurgery, topical chemotherapy, and conventional surgery. J Dermatol Surg Oncol 1980; 6:576-8. [PMID: 7190166 DOI: 10.1111/j.1524-4725.1980.tb00922.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Garcia e Silva L, Martins O, Picoto ADS, Verde SF, Oliveira ADS. Bone formation in chondrodermatitis nodularis helicis. J Dermatol Surg Oncol 1980; 6:582-5. [PMID: 7391334 DOI: 10.1111/j.1524-4725.1980.tb00923.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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Saad FA, Saad NA, Cury J, Martins O, Atra E, Pupo JUNIOR RDA. [Perirenal lipoma. Histochemistry]. Hospital (Rio J) 1968; 74:1489-96. [PMID: 5305326] [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: 01/14/2023]
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