The Journal of International Advanced Otology
Original Article

Differential Expression of LaminB1 in the Developing Rat Cochlea


Department of Otolaryngology-Head and Neck Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China

J Int Adv Otol 2019; 15: 106-111
DOI: 10.5152/iao.2019.6573
Read: 483 Downloads: 81 Published: 03 September 2019



OBJECTIVES: To explore the temporal expression pattern of LaminB1 in the cochlea of postnatal rat, and whether LaminB1 is associated with cochlear development.


MATERIALS and METHODS: Sprague–Dawley rats ranging from postnatal day 0 (p0) to 21 (p21) were used. The tissues of stria vascularis (STV) including spiral ligament, spiral ganglion cell (SGC), and basilar membrane (BM), including the organ of Corti, were dissected, respectively. Immunofluorescence, quantitative real-time polymerase chain reaction, and western blot were applied to detect the expression of LaminB1 in individual cochlear tissues at both mRNA and protein levels.


RESULTS: Immunofluorescence revealed that LaminB1 was localized in the outer hair cells, inner hair cells, Kolliker’s organ, Reissner’s membrane, SGC, STV, and spiral ligament. The intensity of staining surrounding the scala media decreased during cochlear development. The expression of LaminB1 mRNA and protein in STV, SGC, and BM was at a maximum level at p0 but gradually declined to a minimum level at p21.


CONCLUSION: Our research provided direct evidence that LaminB1 was expressed in the developing cochlea and developmentally regulated in cochlear tissues, suggesting a possible role of LaminB1 in cochlear development. Our result provided a theoretical basis for further study about the physiological function of LaminB1 in the peripheral auditory system.


Cite this article as: Du Z, Chen J, Zhu H, Chu H. Differential Expression of LaminB1 in the Developing Rat Cochlea. J Int Adv Otol 2019; 15(1): 106-11.

ISSN1308-7649 EISSN 2148-3817