Growth factors, apoptotic cells and barx1 gene in bone and soft tissue of skeletal class III patients

Growth factors and growth stimulating genes are main signaling molecules for growth and development in ante- and postnatal period involved in cellular proliferation, differentiation and morphogenesis of tissues and organs during embryogenesis, postnatal growth and adulthood. The aim of this study was to evaluate TGF-beta (transforming growth factor-beta), BMP2/4 (bone morphogenetic protein 2/4), FGFR1 (fibroblast growth factor receptor one), barx1 gene and apoptosis from tissue samples of oro-maxillo-facial region in skeletal class III patients to reveal possible morphopathogenesis of severe skeletal anomalies. The study group included 9 patients with skeletal class III malocclusion. During orthognatic surgery tissue samples from tuber maxillae, ramus mandibulae anterior and posterior part, as well as gingiva from the lower jaw in region of second molar have been taken. Samples were stained with immunohistochemistry for TGF-beta, BMP2/4, FGFR1, apoptosis and barx1 gene. We used also the routine histological staining with haematoxyline and eosine. In tuber maxillae, ramus mandibulae anterior and posterior part staining for TGF-beta was the most relevant. Also BMP2/4, FGFR1 and barx1 showed the highest mean number of positive cells in tuber maxillae. Barx1 was equally expressed in ramus mandibulae, but BMP2/4 and FGFR1 mainly stained its posterior part cells. Apoptosis mostly affected ramus mandibulae anterior part. CONCLUSIONS: We suggest about more active stimulation of bone growth in tuber maxilla whereas ramus mandibulae. Apoptosis mainly affects ramus mandibulae anterior part that possibly connects to the lower expression of growth stimulating factors and may indicate lower bone remodelation ability.publishersversionPeer reviewe

Basal Cell Carcinoma. Analysis of 395 cases localized in the neck, ear and nose region

Copyright: This record is sourced from MEDLINE/PubMed, a database of the U.S. National Library of MedicineBACKGROUND AND OBJECTIVES: To test if there are different outcomes in basal cell carcinoma for lesion size, histopathology, localization, and recurrence rates. MATERIALS AND METHODS: A total of 395 patients with BCC localized in the neck, nose and ear regions who were surgically treated in Latvian Oncology Centre between 2006-2011 were analyzed retrospectively. The data were analyzed using modified classification based on Clarks et al. (2014) and McKenzie et al. (2016). RESULTS: Three hundred and ninety-five cases of BCC that were surgically treated in head and neck region were reviewed. Results were tabulated in four categories: anatomical region, histopathology, lesion size, and recurrence rates. Classification by anatomical region: 228 cases in the nose region, 82 cases in the neck region, 82 cases in the ear region. Classification by histopathology: 259 cases presented as low risk BCC [nodular, pigmented, adenoid, keratotic and cystic], 21 cases presented as superficial, 94 cases presented as mixed, and 21 cases presented as high-risk BCC (metatypical, morphea form). Mann-Whitney U test was used to compare recurrent BCC cases to non-recurrent cases. Significantly higher recurrence rates were observed if BCC at the time of the excision was ≥10 mm (p<0.001). Significance was also noted in cases where histopathology was mixed BCC and in cases where mixed BCC was localized to the nose region (p<0.001). CONCLUSION: More attention should be brought to assessing classification and clinical treatment synergy. Higher recurrence rates are observed when lesions occur in high risk anatomical region (H zone), when lesion size reaches or exceeds 20 mm in diameter, and when lesion is subtyped as mixed BCC. It is crucial to evaluate risk factors such as BCC subtype and localization, as these are associated with a higher rate of recurrence when present in a single lesion. These risk factors, together with pre-treatment lesion evaluation will enable formulation of better treatment plan and prognostic aspects in each case.publishersversionPeer reviewe