Early diagnosis of an isolated primary peripheral T-cell lymphoma masquerading as massive gingival enlargement in a pediatric patient

Lymphoma cell-derived extracellular vesicles inhibit autophagy and apoptosis to promote lymphoma cell growth via the microRNA-106a/Beclin1 axis

Lymphoma is a common malignant tumor globally. Tumor-derived extracellular vesicles (Evs) participate in genetic information exchange between tumor cells. We investigated the role and mechanism of human Burkitt lymphoma cells Raji-derived Evs (Raji-Evs) in lymphoma cells. Effects of Evs on lymphoma cell proliferation, invasion, autophagy, and apoptosis were assessed using Cell Counting Kit-8 method, Transwell assay, laser confocal microscopy, Western blotting, and flow cytometry. microRNA (miR)-106a expression in lymphoma cells was determined using reverse transcription-quantitative polymerase chain reaction and then downregulated in Raji cells and then Evs were isolated (Evs-in-miR-106a) to evaluate its role in lymphoma cell growth. The binding relationship between miR-106a and Beclin1 was verified using RNA pull-down and dual-luciferase assays. Beclin1 was overexpressed in SU-DHL-4 and Farage cells and SU-DHL-4 cell autophagy and apoptosis were detected. The levels of miR-106a and Beclin1 in SU-DHL-4 cells were detected after adding autophagy inhibitors. The tumorigenicity assay in nude mice was performed to validate the effects of Raji-Evs in vivo. Raji-Evs promoted lymphoma cell proliferation and invasion and increased miR-106a. miR-106a knockdown reversed Evs-promoted lymphoma cell proliferation and invasion. miR-106a carried by Raji-Evs targeted Beclin1 expression. Beclin1 overexpression or miR-106a inhibitor reversed the effects of Evs on lymphoma cell autophagy and apoptosis. Autophagy inhibitors elevated miR-106a expression and lowered Beclin1 expression. Raji-Evs-carried miR-106a inhibited Beclin1-dependent autophagy and apoptosis in lymphoma cells, which were further verified in vivo, together with promoted tumor growth. We proved that Raji-Evs inhibited lymphoma cell autophagy and apoptosis and promoted cell growth via the miR-106a/Beclin1 axis.

Rare case report of idiopathic gingival fibromatosis in childhood and its management

Idiopathic gingival fibromatosis (GF), also known as gingivomatosis, is a rare condition in childhood, with an unknown aetiology. The oral manifestations of the condition are varied and depend on the severity and age of involvement. This paper describe the case of a 5-year-old male child with extensive gingival enlargement covering almost all the maxillary and mandibular teeth resulted in difficulty with speech, mastication and poor aesthetics. Clinical and radiographic examination along with haematological investigations ruled out any systemic association. The case was managed with conventional scalpel blade surgery along with electrocautery under general anaesthesia yielding good results without any recurrence after a 12-month follow-up. The results revealed that the oral manifestations of GF depend on its severity and the age of onset. Timely intervention can help to prevent associated complications in a growing child.