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Regenerative potential of leucocyte‐ and platelet‐rich fibrin. Part B: sinus floor elevation,alveolar ridge preservation and implant therapy. A systematic review
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Gabriele Zoppoli David Brown Serena Nik‐Zainal Gunes Gundem Françoise Rothé Samira Majjaj Anna Garuti Enrico Carminati Sherene Loi Thomas Van Brussel Bram Boeckx Marion Maetens Laura Mudie Delphine Vincent Naima Kheddoumi Luigi Serra Ilaria Massa Alberto Ballestrero Dino Amadori Roberto Salgado Alexandre de Wind Diether Lambrechts Martine Piccart Denis Larsimont Christos Sotiriou 《The Journal of pathology》2015,236(4):457-466
Multifocal breast cancer (MFBC), defined as multiple synchronous unilateral lesions of invasive breast cancer, is relatively frequent and has been associated with more aggressive features than unifocal cancer. Here, we aimed to investigate the genomic heterogeneity between MFBC lesions sharing similar histopathological parameters. Characterization of different lesions from 36 patients with ductal MFBC involved the identification of non‐silent coding mutations in 360 protein‐coding genes (171 tumour and 36 matched normal samples). We selected only patients with lesions presenting the same grade, ER, and HER2 status. Mutations were classified as ‘oncogenic’ in the case of recurrent substitutions reported in COSMIC or truncating mutations affecting tumour suppressor genes. All mutations identified in a given patient were further interrogated in all samples from that patient through deep resequencing using an orthogonal platform. Whole‐genome rearrangement screen was further conducted in 8/36 patients. Twenty‐four patients (67%) had substitutions/indels shared by all their lesions, of which 11 carried the same mutations in all lesions, and 13 had lesions with both common and private mutations. Three‐quarters of those 24 patients shared oncogenic variants. The remaining 12 patients (33%) did not share any substitution/indels, with inter‐lesion heterogeneity observed for oncogenic mutation(s) in genes such as PIK3CA, TP53, GATA3, and PTEN. Genomically heterogeneous lesions tended to be further apart in the mammary gland than homogeneous lesions. Genome‐wide analyses of a limited number of patients identified a common somatic background in all studied MFBCs, including those with no mutation in common between the lesions. To conclude, as the number of molecular targeted therapies increases and trials driven by genomic screening are ongoing, our findings highlight the presence of genomic inter‐lesion heterogeneity in one‐third, despite similar pathological features. This implies that deeper molecular characterization of all MFBC lesions is warranted for the adequate management of those cancers. © 2015 The Authors. Pathological Society of Great Britain and Ireland. 相似文献
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Fellermann K Tanko Z Herrlinger KR Witthoeft T Homann N Bruening A Ludwig D Stange EF 《Inflammatory bowel diseases》2002,8(5):317-324
Intravenous cyclosporine has proven to be an alternative to emergency colectomy in steroid-refractory ulcerative colitis, whereas the experience with FK506 is limited. In this report we compare intravenous to oral FK506 treatment in 38 patients with refractory ulcerative (n = 33) or indeterminate (n = 5) colitis. FK506 was started intravenously in the first group (n = 18) at a dose of 0.01 to 0.02 mg/kg up to 14 days, followed by 0.1 to 0.2 mg/kg orally, or was started orally at this dose in a second group (n = 20). Additional azathioprine/6-mercaptopurine was given and steroids were tapered in responding patients, followed by a dose reduction of FK506. Clinical disease activity and laboratory parameters were assessed to evaluate efficacy and safety. Primary objectives were the induction of remission (Truelove index of mild) and colectomy-free survival. Treatment lasted for a mean of 7.6 months, and the mean observation period was 16.2 months. Eighteen of 38 patients improved within 14 days, and a complete remission was achieved in 13 patients after 1 month. A colectomy within 1 month was performed in 3 of 38 patients. The overall colectomy rate was 34%. One-half of the patients with a minimum follow-up of 2 years required a colectomy. Intravenous and per oral administration were equally safe and effective. The most frequent adverse events included tremor, hyperglycemia, hypertension, and infection, but none were severe. Renal impairment was rare and subsided upon drug withdrawal. In conclusion. FK506 is effective in the treatment of refractory colitis with per oral dosing being equivalent to intravenous administration. 相似文献
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Nastaran Meschi Petra Hilkens Ivo Lambrichts Kathleen Van den Eynde Athina Mavridou Olaf Strijbos Marieke De Ketelaere Gertrude Van Gorp Paul Lambrechts 《Clinical oral investigations》2016,20(4):807-814
Objectives
An immunohistological study of an infected immature permanent human tooth after a regenerative endodontic procedure (REP) was conducted in order to determine the histologic outcome of this procedure. Besides observed signs of angiogenesis and neurogenesis, repair and/or regeneration of the pulp-dentin complex was also investigated.Materials and methods
A REP was performed on tooth 45 of a 10-year-old girl. Eleven months post-treatment, the tooth had to be removed for orthodontic reasons. The following investigations were performed: immunohistology and radiographic quantification of root development. After hematoxylin-eosin (HE) staining, the following immunomarkers were selected: neurofilament (NF), pan cytokeratin (PK), osteocalcin (OC), and CD34.Results
The REP resulted in clinical and radiographic healing of the periradicular lesion and quantifiable root development. The HE staining matches with the medical imaging post-REP: underneath the mineral trioxide aggregate a calcified bridge with cell inclusions, connective pulp-like tissue (PLT) with blood vessels, osteodentin against the root canal walls, on the root surface cementum (Ce), and periodontal ligament (PDL). The PDL was PK+. The blood vessels in the PLT and PDL were CD34+. The Ce, osteodentin, and stromal cells in the PLT were OC+. The neurovascular bundles in the PLT were NF+.Conclusions
Immunohistologically, REP of this infected immature permanent tooth resulted in an intracanalar connective tissue with a regulated physiology, but not pulp tissue.Clinical relevance
REP of an immature permanent infected tooth may heal the periapical infection and may result in a combination of regeneration and repair of the pulp-dentin complex.59.
Lauren B. Carrington Stephanie N. Seifert M. Veronica Armijos Louis Lambrechts Thomas W. Scott 《The American journal of tropical medicine and hygiene》2013,88(4):689-697
Diurnal temperature fluctuations can fundamentally alter mosquito biology and mosquito-virus interactions in ways that impact pathogen transmission. We investigated the effect of two daily fluctuating temperature profiles on Aedes aegypti vector competence for dengue virus (DENV) serotype-1. A large diurnal temperature range of 18.6°C around a 26°C mean, corresponding with the low DENV transmission season in northwestern Thailand, reduced midgut infection rates and tended to extend the virus extrinsic incubation period. Dissemination was first observed at day 7 under small fluctuations (7.6°C; corresponding with high DENV transmission) and constant control temperature, but not until Day 11 for the large diurnal temperature range. Results indicate that female Ae. aegypti in northwest Thailand are less likely to transmit DENV during the low than high transmission season because of reduced DENV susceptibility and extended virus extrinsic incubation period. Better understanding of DENV transmission dynamics will come with improved knowledge of temperature effects on mosquito-virus interactions. 相似文献
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Tetsuji Nagao Georg Golor Hanspaul Hagenmaier Diether Neubert 《Archives of toxicology》1993,67(9):591-597
The potency of 2,3,4,7,8-pentachlorodibenzofuran (P5CDF) and of three defined 2,3,7,8-TCDD-free mixtures of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDDs/PCDFs) to induce cleft palates in NMRI mice was studied. The data were compared with a dose-response curve for 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD). The slope of the dose-response curve for P5CDF was the same as for TCDD. However, application of the International-TCDD-Toxic-Equivalency (I-TE) factor (NATO/CCMS 1988) of 0.5 overestimated the potency of the pentachlorinated congener about 2.5-fold under these experimental conditions, suggesting 0.2 as a TE factor. When assessing the cleft palate frequency on the basis of I-TEs and the weight of the substances, the potencies of the two PCDF mixtures studied were also clearly overestimated. This result was not substantially changed when using the TE factor of 0.2 for P5CDF. For the PCDD mixture studied, the cleft palate-inducing potency found largely agreed with the prediction when applying the I-TE factors. According to our data, the use of TE factors as calculated by the UBA/BGA (1985) or the NATO/CCMS (1988) are both conservative when attempting to assess the cleft palate incidence induced by PCDF mixtures in mice. 相似文献