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. 2021 Mar 19;12:1789. doi: 10.1038/s41467-021-22065-8

Fig. 1. The intraflagellar transport (IFT) in the sensory cilia is decreased by ageing.

Fig. 1

a The enhanced slowing response to the food of worms at indicated ages. Sensing the food reduces worm movement (body bends). The worms at day 10 of adulthood are over the reproductive age and exhibit ageing features. n = 3 (day 1) or n = 4 (day 10) biological independent experiments. p = 0.0078 and 0.2493, respectively. b. The DiI staining is decreased in the sensory neurons of aged worms (n = 66 and 62 animals respectively. p = 0.0001.). Arrows denote the soma of sensory neurons. Scale bar: 10 μm. c. A depiction of IFT in sensory cilia, which are at the dendritic endings of sensory neurons. IFT-B complex and kinesin control the anterograde IFT, whereas IFT-A complex and dynein modulate the retrograde IFT. df IFT decreases with ageing. Representative IFT components were examined at indicated ages. The representative kymographs (d), velocities (e) and frequencies (f) are respectively shown. For d, similar results were obtained in all independent experiments. Exact sample size and p value are included in Source Data file. (+) and (−) denote microtubule polarity. Horizontal scale bars: 2 μm; vertical scale bars: 2 s. Data are presented as mean ± SEM in e and mean ± SD in the rest. Two-way ANOVA in e, and unpaired t-test (two-tailed) in the rest, **p < 0.01, ***p < 0.001, ns non-significant. Source data are provided as a Source Data file.