An evaluation of serum Otolin-1 & Vitamin-D in benign paroxysmal positional vertigo

Article type: Research Article

Authors: Yadav, Harsha^a | Irugu, DVK^b | Ramakrishanan, Lakshmy^c | Singh, Archana^d | Abraham, Ransi^e | Sikka, Kapil^f | Thakar, Alok^g | Verma, Hitesh^{h; *}

Affiliations: [a] Junior Resident, Department of Otorhinolaryngology-Head & Neck Surgery, AIIMS, New Delhi, India | [b] Associate Professor, Department of Otorhinolaryngology-Head & Neck Surgery, AIIMS, New Delhi, India | [c] Professor, Department of Cardiac Biochemistry, AIIMS, New Delhi, India | [d] Associate Professor, Department of Biochemistry, AIIMS, New Delhi, India | [e] Senior Research Officer, Department of Cardiac Biochemistry, AIIMS, New Delhi, India | [f] Additional Professor, Department of Otorhinolaryngology-Head & Neck Surgery, AIIMS, New Delhi, India | [g] Professor & Head, Department of Otorhinolaryngology-Head & Neck Surgery, AIIMS, New Delhi, India | [h] Associate Professor, Department of Otorhinolaryngology-Head & Neck Surgery, AIIMS, New Delhi, India

Correspondence: [*] Corresponding author: Dr Hitesh Verma, Associate Professor, Department of Otorhinolaryngology-Head & Neck Surgery, AIIMS, New Delhi, India. Tel.: +91 9868397480; Fax: +91 011 26588663 / 26588641; E-mail: [email protected].

Abstract: BACKGROUND:Serum otolin-1 is an inner ear protein exclusively expressed in otoconia and cells of vestibule and cochlea. Serum otolin-1 is found to be quantifiable in patients with BPPV. Low Vitamin-D is associated with pathogenesis of BPPV. Since otoconia degeneration contributes to BPPV, lack of Vitamin-D may impact otoconia structure and integrity. OBJECTIVE:We aimed at studying the s.otolin-1 as biomarker and significance of vit-D in BPPV. MATERIAL AND METHOD:23 patients in test and control groups respectively were chosen within the age of 20 to 65 years. All the patients were diagnosed using Dix Hallpike menouver and head roll test, patients were treated with appropriate Canal Reposition Menouver (CRM). RESULTS:Serum Otolin-1 levels among the test ranged from 366 to 882 pg/mL with mean of 585.17 pg/mL whereas in control group ranged from 223 to 462 pg/mL with mean of 335.26 pg/mL. Mean Vitamin-D levels among the test group was 22.67 ng/mL (Range = 6.3–68.4) and that of control 15.43 pg/mL (Range = 5.4–27.7) respectively. The relationship between the serum Otolin-1 and Vitamin-D was not statistically significant. CONCLUSION:Otolin-1 levels is increased in BPPV patients and is sensitive in BPPV, specificity needs to be validated. Role of vitamin-D with respect to inner ear proteins needs further investigation.

Keywords: Otolin-1, vitamin D, inner ear, Dix hallpike, canalith reposition procedure, semicircular canal

DOI: 10.3233/VES-201601

Journal: Journal of Vestibular Research, vol. 31, no. 6, pp. 433-440, 2021