Circuit-wide proteomics profiling reveals brain region-specific protein signatures in the male WKY rats with endogenous depression

Co-decoction of Lilii bulbus and Radix Rehmannia Recens and its key bioactive ingredient verbascoside inhibit neuroinflammation and intestinal permeability associated with chronic stress-induced depression via the gut microbiota-brain axis

BACKGROUND

Gut microbiota plays a critical role in the pathogenesis of depression and are a therapeutic target via maintaining the homeostasis of the host through the gut microbiota-brain axis (GMBA). A co-decoction of Lilii bulbus and Radix Rehmannia Recens (LBRD), in which verbascoside is the key active ingredient, improves brain and gastrointestinal function in patients with depression. However, in depression treatment using verbascoside or LBRD, mechanisms underlying the bidirectional communication between the intestine and brain via the GMBA are still unclear.

PURPOSE

This study aimed to examine the role of verbascoside in alleviating depression via gut-brain bidirectional communication and to study the possible pathways involved in the GMBA.

METHODS

Key molecules and compounds involved in antidepressant action were identified using HPLC and transcriptomic analyses. The antidepressant effects of LBRD and verbascoside were observed in chronic stress induced depression model by behavioural test, neuronal morphology, and synaptic dendrite ultrastructure, and their neuroprotective function was measured in corticosterone (CORT)-stimulated nerve cell injury model. The causal link between the gut microbiota and the LBRD and verbascoside antidepressant efficacy was evaluate via gut microbiota composition analysis and faecal microbiota transplantation (FMT).

RESULTS

LBRD and Verbascoside administration ameliorated depression-like behaviours and synaptic damage by reversing gut microbiota disturbance and inhibiting inflammatory responses as the result of impaired intestinal permeability or blood-brain barrier leakiness. Furthermore, verbascoside exerted neuroprotective effects against CORT-induced cytotoxicity in an in vitro depression model. FMT therapy indicated that verbascoside treatment attenuated gut inflammation and central nervous system inflammatory responses, as well as eliminated neurotransmitter and brain-gut peptide deficiencies in the prefrontal cortex by modulating the composition of gut microbiota. Lactobacillus, Parabacteroides, Bifidobacterium, and Ruminococcus might play key roles in the antidepressant effects of LBRD via the GMBA.

CONCLUSION

The current study elucidates the multi-component, multi-target, and multi-pathway therapeutic effects of LBRD on depression by remodeling GMBA homeostasis and further verifies the causality between gut microbiota and the antidepressant effects of verbascoside and LBRD.

Association of menopausal symptoms and menopausal quality of life with premenstrual syndrome

Background

Premenstrual symptoms at reproductive age resemble menopausal symptoms and have symptomatic commonalities. We hypothesized that women with previous premenstrual syndrome may be more prone to develop menopausal symptoms and aimed to investigate the association of menopausal symptoms and menopausal quality of life with premenstrual symptoms.

Methods

The study included 120 postmenopausal women. We evaluated the current menopausal symptoms with menopause rating scale (MRS) and quality of life with menopause-specific quality of life scale (MSQoL), previous premenstrual symptoms with premenstrual syndrome scale (PMSS) retrospectively and compared the associations statistically.

Results

According to retrospective PMSS, participants were divided into two groups; with and without premenstrual syndrome (PMS). PMS group included 29 (24.2%) participants and 91 (75.8%) participants were in group without PMS. Sociodemographic characteristics of groups were similar. Somatic and psychological symptoms were higher in MRS of PMS group. Evaluating the MSQoL; psychosocial and physical symptoms were impaired in the PMS group. Vasomotor, urogenital and sexual symptoms were similar in both groups.

Conclusion

Premenstrual and menopausal symptoms were related in terms of somatic, and psychosocial symptoms but not in vasomotor, urogenital, and sexual symptoms. It seems that women with previous premenstrual symptoms are more likely to develop menopausal symptoms in some ways. However, a prospective longitudinal study may be needed for more conclusive results.