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Altered ciliary morphofunction in the oviductal infundibulum of systemic autoimmune disease-prone MRL/MpJ-Faslpr/lpr mice

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Abstract

According to our previous reports, impaired oocyte pickup was observed in the oviductal infundibulum of an autoimmune disease (AD) mouse model, suggesting a relationship between female infertility and AD. This study examines the relationship between AD and infundibulum morphofunction by focusing on the epithelial cilia. Healthy MRL/MpJ and AD-prone MRL/MpJ-Faslpr/lpr mice were examined at 3 and 6 months of age, representing early and late disease stages, respectively. Oocyte pickup indices decreased with AD progression indicated by splenomegaly, autoantibody production and increased T cell counts of infundibulum mucosa in MRL/MpJ-Faslpr/lpr mice. Ciliary beating frequency (CBF) and height in the infundibulum were faster and higher in MRL/MpJ-Faslpr/lpr mice than in MRL/MpJ mice at the early AD stages, although the absolute CBF values were lower at the late AD stage. At the late stage, ciliary height did not differ between mouse lines but the morphological index of cilia beating direction indicated randomized patterns in MRL/MpJ-Faslpr/lpr mice. The tracheal mucosa was also examined as a representative example of cilia morphology; its CBF decreased at the late AD stage in MRL/MpJ-Faslpr/lpr; however, there were no AD-related morphological changes. Our results demonstrate altered cilia motility in systemic and reproductive organs, with such morphological changes of the infundibulum likely impairing function, including oocyte pickup.

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Abbreviations

CBF:

Ciliary beat frequency

COC:

Cumulus oocyte complex

D-MEM:

Dulbecco’s modified Eagle’s medium (high glucose) with L-glutamine and phenol red

dsDNA:

Double-stranded DNA

Fas:

Fas cell surface death receptor

hCG:

Human chorionic gonadotropin

lpr:

Lymphoproliferation

MRL/+:

MRL/MpJ

MRL/lpr:

MRL/MpJ-Faslpr/lpr

OO:

Ovulated oocyte

PB:

Phosphate buffer

PBS:

Phosphate-buffered saline

PCD:

Primary ciliary dyskinesia

PFA:

Paraformaldehyde

PMSG:

Pregnant mare serum gonadotropin

PUR:

Oocyte pickup rate

ROI:

Region of interest

S/B:

Ratio of spleen weight to body weight

TEM:

Transmission electron microscope

References

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Acknowledgments

We are deeply grateful to Dr. Jason Chen for willingly supporting our CBF measurements by providing us his developed program.

Funding

This work was supported in part by JSPS KAKENHI Grant Number JP18J22313 (M. Hosotani).

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Authors and Affiliations

Authors

Contributions

M. Hosotani designed, performed experiments and analyzed data. M.A. Masum and Y. Otani analyzed data. O. Ichii, T. Nakamura, Y.H.A. Elewa and Y. Kon designed and reviewed the experiments. M. Hosotani, O. Ichii and Y. Kon wrote the manuscript. All authors approved the final manuscript.

Corresponding author

Correspondence to Marina Hosotani.

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Conflict of interest

The authors declare that they have no conflicts of interest.

Ethical approval

Animal experimentation was approved by the Institutional Animal Care and Use Committee of the Graduate School of Veterinary Medicine, Hokkaido University (Approval No. 15-0079). Experimental animals were handled in accordance with the Guide for the Care and Use of Laboratory Animals, Graduate School of Veterinary Medicine, Hokkaido University (approved by the Association for Assessment and Accreditation of Laboratory Animal Care International).

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Electronic supplementary material

Online Resource 1.

The ciliary beating in the oviductal infundibulum of MRL/MpJ mice at 3 months. (MP4 243 kb)

Online Resource 2.

The ciliary beating in the oviductal infundibulum of MRL/MpJ mice at 6 months. (MP4 366 kb)

Online Resource 3.

The ciliary beating in the oviductal infundibulum of MRL/MpJ-Faslpr/lpr mice at 3 months. (MP4 257 kb)

Online Resource 4.

The ciliary beating in the oviductal infundibulum of MRL/MpJ-Faslpr/lpr mice at 6 months. (MP4 168 kb)

Online Resource 5.

The ciliary beating in the trachea of MRL/MpJ mice at 3 months. (MP4 289 kb)

Online Resource 6.

The ciliary beating in the trachea of MRL/MpJ mice at 6 months. (MP4 354 kb)

Online Resource 7.

The ciliary beating in the trachea of MRL/MpJ-Faslpr/lpr mice at 3 months. (MP4 370 kb)

Online Resource 8.

The ciliary beating in the trachea of MRL/MpJ-Faslpr/lpr mice at 6 months. (MP4 583 kb)

Supplementary Figure S1.

Scheme of the preparation for the ciliary beat frequency measurement. (a) Oviductal infundibulum preparation schematic. The infundibulum is placed into the drop of D-MEM (high glucose) with L-Glutamine and phenol red (D-MEM) and covered with a cover slip so that the ciliated epithelium faces the cover slip. (b) Trachea preparation schematic. The pieces of trachea are placed into D-MEM on a slide and sealed with a cover slip. (PNG 27 kb)

High Resolution Image (TIF 290 kb)

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Hosotani, M., Ichii, O., Nakamura, T. et al. Altered ciliary morphofunction in the oviductal infundibulum of systemic autoimmune disease-prone MRL/MpJ-Faslpr/lpr mice. Cell Tissue Res 380, 627–641 (2020). https://doi.org/10.1007/s00441-020-03175-z

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  • DOI: https://doi.org/10.1007/s00441-020-03175-z

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