Activity

To clinically and histologically evaluate in dogs the healing of gingival recessions treated with coronally advanced flap (CAF) with or without cross-linked hyaluronic acid (HA).

Gingival recession defects were surgically created on the vestibular side of both maxillary canines in 8 dogs. After 8weeks of plaque accumulation, the 16 chronic defects were randomly treated with either CAF alone or CAF and HA-gel (CAF/HA). Clinical and histological outcomes were evaluated at 10weeks post-surgically.

Compared to baseline, the clinical measurements at 10weeks revealed a statistically significant decrease in gingival recession for both CAF (p<0.01) and CAF/HA (p<0.001) groups. Statistically significant differences were found in clinical attachment level (p<0.05) and width of gingival recession (p<0.01) favouring the CAF/HA group. Bone formation was statistically significantly greater in the CAF/HA group than in the CAF group (1.84±1.16mm vs., 0.72±0.62mm, respectively, p<0.05). Formation of cementum and connective tissue attachment were statistically significantly higher in the CAF/HA group compared with the CAF group (i.e. 4.31±1.78mm versus 2.40±1.35mm and 1.69±0.98mm versus 0.74±0.68mm, respectively (p<0.05)).

The present data have for the first time provided histologic evidence for periodontal regeneration of gingival recession defects following treatment with CAF and HA.

The use of HA in conjunction with CAF may represent a novel modality for treating gingival recession defects.

The use of HA in conjunction with CAF may represent a novel modality for treating gingival recession defects.Systematic analysis of tumor-infiltrating lymphocytes is essential for the development of new cancer treatments and the prediction of clinical responses to immunotherapy. Immunomodulatory drugs are used for the treatment of oral squamous cell carcinoma (OSCC), depending on immune infiltration profiles of the tumor microenvironment. In this study, we isolated 11,866 single T cells from tumors and paired adjacent normal tissues of three patients with OSCC. Using single-cell RNA sequencing, we identified 14 distinct T-cell subpopulations within the tumors and 5 T-cell subpopulations in the adjacent normal tissues and delineated their developmental trajectories. Exhausted CD8+ T cells and regulatory CD4+ T cells (CD4+ Tregs) were enriched in OSCC tumors, potentially linked to tumor immunosuppression. Programmed death protein 1 (PD-1) and cytotoxic T lymphocyte-associated protein 4 (CTLA4) were identified as marker genes in exhausted CD8+ T cells, whereas forkhead box P3 (FOXP3) and CTLA4 were identified as markers of CD4+ Tregs. Furthermore, our data revealed that thymocyte selection-associated high-mobility group box (TOX) may be a key regulator of T-cell dysfunction in the OSCC microenvironment. Overexpression of TOX upregulated expression of genes related to T-cell dysfunction. In vitro experiments demonstrated that cytotoxic activity and proliferation efficiency of CD8+ T cells overexpressing PD-1 or TOX were reduced. Notable, the transcription factor PRDM1 was found to transactivate TOX expression via a binding motif in the TOX promoter. Our findings provide valuable insight into the functional states and heterogeneity of T-cell populations in OSCC that could advance the development of novel therapeutic strategies.

To evaluate the efficacy of boric acid as an adjunct to non-surgical periodontal therapy, in comparison with a placebo adjunct, in terms of changes in probing pocket depth (PPD) and clinical attachment level (CAL), in patients with periodontitis.

Four electronic databases were searched from inception to May 2020 (PubMed, Cochrane CENTRAL, EMBASE via OVID and Web of Science). Clinical outcomes were extracted, pooled and meta-analyses conducted using mean difference with standard deviations.

For PPD, a mean additional reduction of 0.58mm (95% CI -0.03-1.19mm, p=0.06) was observed at 3months and a mean additional reduction of 1.18mm (95% CI 0.97-1.40mm, p<0.05) at 6months, compared with placebo. For CAL, a mean additional gain of 0.62mm (95% CI -0.07-1.32mm, p=0.08) was observed at 3months and a mean additional gain of 1.24mm (95% CI 0.89-1.58mm, p<0.05) at 6months, compared with placebo. No adverse events were reported in any studies.

The adjunctive use of boric acid in non-surgical periodontal therapy results in improved treatment outcomes at 3 and 6months, with no adverse events reported.

The adjunctive use of boric acid in non-surgical periodontal therapy results in improved treatment outcomes at 3 and 6 months, with no adverse events reported.

Current guidelines recommend that pulmonary vein (PV) velocity should be recorded by using the right upper pulmonary vein (RUPV) during transthoracic echocardiography (TTE) evaluation of left ventricular diastolic function. However, it is uncertain whether the PV displayed during TTE is truly measuring the upper PV. This study aimed to identify the actual site of each PV that is usually detected during TTE.

We retrospectively studied 105 patients who underwent cardiac computed tomography (CT) and TTE, reconstructed images three-dimensionally, and measured the angles between each PV and the left ventricle (LV) that would correspond to the Doppler incident angle of the apical four-chamber view on TTE. We also performed TTE during catheter ablation to confirm the exact site of the PV.

Apical four-chamber views on TTE revealed that one certain PV was detectable on the right side of the vertebra. CT scans revealed that the median angle of the axes between the LV and right lower pulmonary vein (RLPV) was smaller than that of RUPV 32.1˚ [interquartile range (IQR) 21.7˚-42.1˚] vs. 62.5˚ (IQR 51.6˚-70.6˚), P<.001. During catheter ablation for treatment of atrial fibrillation, in the most well-displayed PV on TTE, we detected the ablation catheter placed in the RLPV.

The most well-displayed PV in an apical four-chamber view by TTE was not the RUPV but the RLPV which showed the smallest angle of incidence toward the LV apex. The RLPV is suitable for evaluation of PV velocity to assess LV diastolic function.

The most well-displayed PV in an apical four-chamber view by TTE was not the RUPV but the RLPV which showed the smallest angle of incidence toward the LV apex. learn more The RLPV is suitable for evaluation of PV velocity to assess LV diastolic function.