Table 1 Chronic unpredictable mild stress procedure.

From: Investigating the modulatory effects of lactoferrin on depressed rats through 16S rDNA gene sequencing and LC–MS metabolomics analysis

No

Stressor

Definition

Immobilization

The rat was placed in a rat restrainer and restrained alone for 2 h

Empty cage

The rat was confined in a cage without any bedding for 24 h

Cold water swimming

The rat was placed in a cylindrical clear plastic container filled with 6 ℃ water for 5 min

Wet padding material

The rat was placed in a cage with 200 ml water in 100 g sawdust for 24 h

Clip the tail

The rat was pinched for one minute at a distance of 3 cm from the tail

Fast for 24 h

The rat was subjected to 24 h of food deprivation

Continuous light

The rat was exposed to continuous light for 24 h

Cage tilt

The rat cage was tilted 45 degrees for 24 h

Strong cage shaking

The rat rocked back and forth for 15 min

Thermal stimulus

The rat was placed in a drying oven at 45 °C for 15 min