Olfactory receptors (ORs) form the largest superfamily of G protein-coupled receptors (GPCRs). Traditionally recognized for their role in the nasal olfactory epithelium, where they mediate the sense of smell, accumulating evidence has firmly established their ectopic expression in non-olfactory tissues, including the intestine, lungs, and kidneys. The intestine, as the primary site for nutrient digestion and absorption, harbors a highly complex chemical environment. To adapt to this environment, the gut employs a sophisticated network of “chemosensors” to monitor luminal contents and maintain homeostasis. Among these sensors, intestinal ORs have emerged as crucial functional components, serving as a molecular bridge that connects environmental chemical signals—such as food-derived odorants—to specific physiological responses. This discovery has significantly deepened our understanding of how dietary flavors and compounds influence intestinal physiology at the molecular level. This review systematically summarizes the expression profiles, ligand classification, and biological functions of ORs within the gastrointestinal tract. Studies indicate that intestinal ORs exhibit distinct spatial distribution patterns across different gut segments and display cell-type specificity, particularly within enterocytes and enteroendocrine cells. These receptors function as versatile sensors capable of recognizing a wide variety of ligands, including exogenous dietary components, gut microbiota metabolites such as short-chain fatty acids, and endogenous small molecules like azelaic acid. Upon activation by specific ligands, intestinal ORs trigger intracellular signaling cascades, primarily involving the AC-cAMP-PKA pathway or calcium influx channels. A major focus of this review is to elucidate the molecular mechanisms by which these receptors regulate the secretion of gut hormones. Activation of specific ORs in enteroendocrine cells has been shown to stimulate the release of hormones such as glucagon-like peptide-1 (GLP-1), peptide YY (PYY), and serotonin (5-HT), thereby modulating systemic energy metabolism, glucose homeostasis, and gastrointestinal motility. Furthermore, the review addresses the critical roles of ORs in immune regulation and pathology. Evidence suggests that specific ORs contribute to the maintenance of intestinal immune homeostasis and may offer protection against inflammation. Beyond their involvement in inflammatory responses, ORs such as Olfr78 have been shown to regulate the differentiation and function of intestinal endocrine cells. Similarly, Olfr544 has been demonstrated to alleviate intestinal inflammation by remodeling the gut microbiome and metabolome. These findings collectively suggest that specific ORs hold promise as therapeutic targets for mitigating intestinal inflammation and maintaining gut homeostasis. Additionally, the review explores the emerging role of ORs in cancer. Although OR expression is often downregulated in tumor tissues compared to normal mucosa, activation of specific ORs by certain ligands can inhibit tumor cell proliferation and migration and induce apoptosis via pathways such as MEK/ERK and p38 MAPK. Conversely, other receptors, such as OR7C1, may serve as biomarkers for cancer-initiating cells. In conclusion, intestinal ORs represent a vital component of the gut’s sensory network. The review also discusses the translational potential of these findings. By elucidating the precise pairing relationships between dietary components and specific ORs, novel therapeutic strategies could be developed. Intestinal ORs may thus emerge as promising targets for nutritional and pharmacological interventions in metabolic diseases, inflammatory bowel diseases, and malignancies.

Zhusha Anshenwan is a classical traditional Chinese medicine （TCM） formula originating from LI Dongyuan's Treatise on the Differentiation of Endogenous and Exogenous Injuries （Nei Wai Shang Bian Huo Lun） of the Jin-Yuan period. It is composed of five medicinal ingredients： Cinnabaris （Zhusha）， Coptidis Rhizoma （Huanglian）， Angelicae Sinensis Radix （Danggui）， Rehmanniae Radix （Shengdihuang）， and Glycyrrhizae Radix et Rhizoma （Gancao）. Under the guidance of TCM theory， this formula is used to treat syndromes of disturbed spirit， including insomnia， palpitations， and anxiety， caused by hyperactivity of heart fire and deficiency of Yin-blood， and it also exerts auxiliary anticonvulsant effects in epilepsy and related conditions. However， the potential neurotoxicity， hepatotoxicity， and nephrotoxicity of its monarch drug， Cinnabaris （mainly composed of mercuric sulfide， HgS）， together with the risk of in vivo accumulation， have rendered its clinical application controversial， and it has not yet been formally included in the Pharmacopoeia of the People's Republic of China. In addition， restrictions imposed by the Minamata Convention on Mercury have led to an increasing shortage of natural medicinal Cinnabaris resources， making the evaluation of the efficacy and safety of synthetic Cinnabaris particularly urgent. This contradiction highlights the complexity of safety evaluation for traditional medicines. Existing studies indicate that Zhusha Anshenwan exhibits definite pharmacological activities in calming the mind， improving sleep， and regulating emotional disorders. Moreover， other components of the formula may exert antagonistic effects on the toxicity of Cinnabaris， and reports of severe mercury poisoning caused by standardized clinical use of this prescription are extremely rare. Research suggests that other ingredients in the compound formula， such as Rehmanniae Radix， Coptidis Rhizoma， and Glycyrrhizae Radix et Rhizoma， may effectively alleviate the hepatorenal toxicity of Cinnabaris through mechanisms including modulation of the gut microbiota， formation of mercury complexes， and direct protection of target organs. This article aims to systematically review the progress in pharmacodynamic research on Zhusha Anshenwan， to explore its mechanisms of action in depth， and to analyze the toxicokinetic characteristics and safety risks of Cinnabaris， as well as the scientific connotations of toxicity reduction and efficacy enhancement achieved through compound compatibility. In addition， it compares Zhusha Anshenwan with other commonly used sedative formulas， with the aim of providing a scientific basis and forward-looking perspectives for the safe and rational application and in-depth development of this classical prescription in a modern context， and of emphasizing the important value of holistic research on TCM compound formulas in addressing the challenges of single-component toxicity.

Brain’s neural activities encompass both periodic rhythmic oscillations and aperiodic neural fluctuations. Rhythmic oscillations manifest as spectral peaks of neural signals, directly reflecting the synchronized activities of neural populations and closely tied to cognitive and behavioral states. In contrast, aperiodic fluctuations exhibit a power-law decaying spectral trend, revealing the multiscale dynamics of brain neural activity. In recent years, researchers have made notable progress in studying brain aperiodic dynamics. These studies demonstrate that aperiodic activity holds significant physiological relevance, correlating with various physiological states such as external stimuli, drug induction, sleep states, and aging. Aperiodic activity serves as a reflection of the brain’s sensory capacity, consciousness level, and cognitive ability. In clinical research, the aperiodic exponent has emerged as a significant potential biomarker, capable of reflecting the progression and trends of brain diseases while being intricately intertwined with the excitation-inhibition balance of neural system. The physiological mechanisms underlying aperiodic dynamics span multiple neural scales, with activities at the levels of individual neurons, neuronal ensembles, and neural networks collectively influencing the frequency, oscillatory patterns, and spatiotemporal characteristics of aperiodic signals. Aperiodic dynamics currently boasts broad application prospects. It not only provides a novel perspective for investigating brain neural dynamics but also holds immense potential as a neural marker in neuromodulation or brain-computer interface technologies. This paper summarizes methods for extracting characteristic parameters of aperiodic activity, analyzes its physiological relevance and potential as a biomarker in brain diseases, summarizes its physiological mechanisms, and based on these findings, elaborates on the research prospects of aperiodic dynamics.

AIM To study the effect of Zuogui Pills on improving ovarian function in rats with premature ovarian failure(POF)by regulating autophagy.METHODS Seven rats were randomly selected as the blank group,and the remaining rats were injected with cisplatin(4.0 mg/kg)intraperitoneally to establish POF model.The success of the model was evaluated by observing the changes of estrous cycle.Twenty-one successful model of rats were randomly divided into model group and estradiol group(0.01 mg/mL)and Zuogui Pills group(1.85 g/kg),with 7 rats in each group,the drug was administered continuously for 21 days.Serum E2,FSH and LH levels were detected by ELISA;HE staining was used to observe the pathological morphology of ovarian tissue;immunohistochemical(IHC)method was used to detect the protein expressions of LC3B,SIRT1 and FoxO1 in ovarian tissues;RT-qPCR method was used to detect the mRNA expressions of LC3B,Beclin-1 and Atg5 in ovarian tissues;the protein expressions of SIRT1,FoxO1 and Ac-FoxO1 in ovarian tissue was detected by Western blot.RESULTS Compared with the blank group,the ovarian index of the model group decreased(P＜0.01);serum FSH and LH levels increased(P＜0.01)and E2 level decreased(P＜0.01);the structure of ovary is disordered,especially atresia follicle;the mRNA expressions of LC3B,Beclin-1 and Atg5 in ovarian tissue increased(P＜0.01),while the protein expressions of LC3B and Ac-FoxO1 increased(P＜0.01),while the protein expressions of SIRT1 and FoxO1 decreased(P＜0.01).Compared with the model group,the ovarian index of rats in estradiol group and Zuogui Pills group increased(P＜0.01);serum FSH and LH levels decreased(P＜0.01)and E2 level increased(P＜0.01);the number of primordial follicles in ovary increased and the number of atresia follicles decreased;the mRNA expressions of LC3B,Beclin-1 and Atg5 in ovarian tissue decreased(P＜0.01),while the protein expressions of LC3B and Ac-FoxO1 decreased(P＜0.01),while the protein expressions of SIRT1 and FoxO1 increased(P＜0.01).CONCLUSION Zuogui Pills may inhibit autophagy by activating SIRT1/FoxO1 signaling pathway,thus improving the pathological state of POF rats,regulating the level of sex hormones in rats,restoring endocrine balance,enhancing ovarian reserve function,promoting the normal development of follicles and delaying the progress of POF.

Objective The morphological and data characteristics of premature ventricular contraction(PVC)were obtained through dynamic electrocardiogram(DCG),and its correlation with new-onset major adverse cardiovascular events(MACE)was analyzed.Methods A total of 115 patients with PVC admitted to Huzhou First People's Hospital from January 2022 to January 2024 were retrospectively selected and divided into MACE group(n=31)and non-MACE group(n=84)according to the new-onset MACE.Collect the baseline data of patients,as well as DCG data such as the morphological and data characteristics of PVC.Collect the baseline data of patients,as well as DCG data such as the morphological and data characteristics of PVC.Multivariate Logistic regression was used to analyze the influencing factors of new-onset MACE in patients with PVC.The receiver operating characteristic(ROC)curve was drawn to analyze the predictive value of influencing factors for the risk of new-onset MACE in patients with PVC.Results There were statistically significant differences in gender,disease duration,QRS wave duration,PVC origin,PVC load,and Lown classification between two groups of patients(P＜0.05).Multivariate Logistic regression analysis showed that QRS wave duration(OR=1.070),PVC origin(OR=6.840)and PVC load(OR=2.583)were independent risk factors for new-onset MACE in PVC patients(P＜0.05).The ROC curve showed that the area under the curve for predicting new-onset MACE in PVC patients with QRS wave duration,PVC origin,and PVC load were 0.791,0.750,and 0.917 respectively.The predictive value of PVC load was the highest.Conclusion QRS wave duration,PVC origin and PVC load are related to new-onset MACE in PVC patients,and PVC load has a good predictive effect on the risk of new-onset MACE in PVC patients.

Objective:To explore the influence of oligospermia(OS)on the detection of sperm DNA fragmentation index(DFI)by fluorescence method based on artificial intelligence(AI)recognition and flow cytometry-based sperm chromatin structure as-say(SCSA).Methods:We collected semen samples from 201 males,including 50 azoospermia(AS)patients as negative controls,90 OS patients(sperm concentration＞0 × 106/ml and＜15 × 106/ml),and 61 normal men(sperm concentration ≥15 ×106/ml).Then we subdivided the OS patients into a mild OS(sperm concentration ≥10 × 106/ml and＜15 × 106/ml),a moderate OS(sperm concentration ≥5 × 106/ml and＜10 × 106/ml)and a severe/extremely severe OS group(sperm concentration＞0 × 106/ml and＜5 × 106/ml),with 30 cases in each group,and compared the results of DFI detection between the AI fluorescence method and tradi-tional flow cytometry.Results:The DFI value detected by AI fluorescence method showed statistically significant difference from that detected by flow cytometry in the AS,moderate OS and severe/extremely severe OS groups(P＜0.01),the former even lower than the latter,but not in the normal control and the mild OS groups(P＞0.05).In the AS group,a dramatically lower rate of non-0 results was achieved by AI fluorescence method than by flow cytometry(8％vs 100％,P＜0.01).The DFI values detected by AI fluores-cence method exhibited a good linear correlation to those obtained by flow cytometry in the normal control and mild OS groups(β2=0.7470;R2=0.7180),but a poor linear correlation in the OS full-sample,moderate OS and severe/extremely severe OS groups(R2=0.3092;R2=0.3558;R2=0.2147).Conclusion:The AI fluorescence method has a higher specificity and is more suitable than flow cytometry for detection of sperm DFI in OS patients.The DFI values obtained by the two methods are consistent with sperm concen-tration ≥10 × 106/ml,but the accuracy of the results of detection may be affected with sperm concentration＞0 × 106/ml and＜10 × 106/ml.

Objective To explore the value of ventricular response(VR)on ambulatory electrocardio-graphy in evaluating atrial fibrillation conversion in patients with paroxysmal atrial fibrillation(PAF).Meth-ods Used 3-lead Holter monitor to collect complete data for more than 3 hours before atrial fibrillation con-version.The irregular heart rates recorded 5 minutes(VR0-5 min),60-65 minutes(VR60-65 min),and 120-125 minutes(VR120-125 min)prior to atrial fibrillation conversion were designated as VR values.The average heart rates of the 10 consecutive fastest and slowest heartbeats were calculated as the maximum and minimum VR values,respectively,while the average heart rate during the entire atrial fibrillation episode was taken as the mean VR value.Atrial fibrillation conversions occurring 06:00-21:59 were classified as daytime events,and those occurring 22:00-05:59(the following day)were classified as nighttime events.The effects of gender differences and circadian rhythm variations on VR values before atrial fibrillation conversion were analyzed.Additionally,the low-frequency power(LF),high-frequency power(HF),and their ratio(LF/HF)were ob-tained 5 minutes,60-65 minutes,and 120-125 minutes before atrial fibrillation conversion,and differences in LF,HF,and LF/HF at these time points were analyzed.Results The minimum VR0-5 min before cardioversion of atrial fibrillation was significantly higher than the minimum VR60-65 min and the minimum VR120-125 min(P＜0.05).The maximum VR0-5 min was significantly higher than VR120-125 min(P＜0.05).The minimum VR0-5 min in male group and female group was significantly higher than the minimum VR60-65 min and the minimum VR120-125min before atrial fibrillation reverted(P＜0.05).Of the 86 patients in this study,51 patients(59.30％)experienced daytime events,and the remaining 35 patients(40.70％)experienced nighttime e-vents.The data showed that the minimum VR0-5 min of daytime events was significantly higher than the mini-mum VR60-65 min and the minimum VR120-125 min(P＜0.05).There was no significant difference between the minimum VR0-5 min and the minimum VR60-s5 min and the minimum VR120-125 min(P＞0.05).One-way repeated analysis of variance showed that the longitudinal differences of HF,LF and LF/HF ratio before cardioversion of atrial fibrillation were not statistically significant(P＞0.05).Conclusion The increase of VR value may predict imminent cardioversion in PAF patients,particularly for those experiencing daytime events.

Purpose: This study evaluated a school-based mental health program within a psychiatry clerkship to enhance medical students’ competencies in mental health literacy, empathy, communication, and adaptability. The program aimed to bridge theoretical knowledge with practical skills through experiential learning in a real-world, community-based setting. Methods: The study utilized convenience sampling to select 32 medical students from the 2023–2024 psychiatry clerkship cohort. Four focus group discussions, each lasting 60–90 minutes, provided qualitative data, which were analyzed using reflexive thematic analysis in Atlas.ti (ATLAS.ti GmbH, Germany) to identify themes related to professional development. Results: Five key themes emerged, highlighting significant gains in context-sensitive communication, empathy, and mental health literacy specific to adolescent issues. The students reported increased clinical confidence, enhanced resilience through psychological techniques such mindfulness and motivational interviewing, and benefited from sustained engagement and peer support, fostering collaboration and stress management. Conclusion The school-based mental health program enhanced essential competencies in mental health literacy, empathy, communication, and practical skills for medical students. By integrating experiential learning into medical education, the program addressed training gaps, equipping future healthcare providers with the skills necessary for holistic and patient-centered mental healthcare across diverse clinical settings. The approach showed potential for broader applications in medical education to prepare students for comprehensive mental health support skills.

Purpose: This study evaluated a school-based mental health program within a psychiatry clerkship to enhance medical students’ competencies in mental health literacy, empathy, communication, and adaptability. The program aimed to bridge theoretical knowledge with practical skills through experiential learning in a real-world, community-based setting. Methods: The study utilized convenience sampling to select 32 medical students from the 2023–2024 psychiatry clerkship cohort. Four focus group discussions, each lasting 60–90 minutes, provided qualitative data, which were analyzed using reflexive thematic analysis in Atlas.ti (ATLAS.ti GmbH, Germany) to identify themes related to professional development. Results: Five key themes emerged, highlighting significant gains in context-sensitive communication, empathy, and mental health literacy specific to adolescent issues. The students reported increased clinical confidence, enhanced resilience through psychological techniques such mindfulness and motivational interviewing, and benefited from sustained engagement and peer support, fostering collaboration and stress management. Conclusion The school-based mental health program enhanced essential competencies in mental health literacy, empathy, communication, and practical skills for medical students. By integrating experiential learning into medical education, the program addressed training gaps, equipping future healthcare providers with the skills necessary for holistic and patient-centered mental healthcare across diverse clinical settings. The approach showed potential for broader applications in medical education to prepare students for comprehensive mental health support skills.

Purpose: This study evaluated a school-based mental health program within a psychiatry clerkship to enhance medical students’ competencies in mental health literacy, empathy, communication, and adaptability. The program aimed to bridge theoretical knowledge with practical skills through experiential learning in a real-world, community-based setting. Methods: The study utilized convenience sampling to select 32 medical students from the 2023–2024 psychiatry clerkship cohort. Four focus group discussions, each lasting 60–90 minutes, provided qualitative data, which were analyzed using reflexive thematic analysis in Atlas.ti (ATLAS.ti GmbH, Germany) to identify themes related to professional development. Results: Five key themes emerged, highlighting significant gains in context-sensitive communication, empathy, and mental health literacy specific to adolescent issues. The students reported increased clinical confidence, enhanced resilience through psychological techniques such mindfulness and motivational interviewing, and benefited from sustained engagement and peer support, fostering collaboration and stress management. Conclusion The school-based mental health program enhanced essential competencies in mental health literacy, empathy, communication, and practical skills for medical students. By integrating experiential learning into medical education, the program addressed training gaps, equipping future healthcare providers with the skills necessary for holistic and patient-centered mental healthcare across diverse clinical settings. The approach showed potential for broader applications in medical education to prepare students for comprehensive mental health support skills.