Abstract
Background: Nasal polyps (NPs) are benign pedicled mucosal protrusions into the nasal cavity of multifactorial origin. Vitamin D
has been demonstrated as having potential immunomodulatory activity and act as an antiproliferative agents.
Aim of the work: To determine the possible antiproliferative effect and immunomodulatory activity of VD on human nasal polyposis.
Material and methods: Based on thirty patients and divided equally into 3 groups. Group Ι (healthy subjects). Group ΙΙ were received
low daily oral dose of VD(1000 IU) for 4 weeks. Group ΙΙΙ were received high daily oral dose of VD(4000 IU) for 4 weeks.Each
group ΙΙ and ΙΙΙ divided into 2 subgroups; group b: patients with NP before taking VD and group a: patients with NP after taking.
Nasal biopsies were obtained of all groups for histological examination and immunohistochemical detection of Toll-like receptors 9
expression.
Results: patients of nasal polyps before VD taking (groups IIb and IIIb) presented with symptoms of Visual Analogue Scale, VAS
score (facial pain, headache, nasal blockage, nasal discharge, post-nasal drip and olfactory disturbance) and endoscopic appearance of
Lund and Mackey score (polypi, edema and discharge), damage of respiratory epithelium, extensive accumulation of collagen fibers
in lamina propria and highly expressed TLR-9. The high dose VD group (IIIa) showed near normal respiratory epithelium, significant
decrease (P |
