Salivary Biomarkers Associated with Psychological Alterations in Patients with Diabetes: A Systematic Review

Salivary β 2 -Microglobulin, Na+, and Cortisol Levels, and Salivary Glands' Uptakes in Sialoscintigraphy in Sjögren Disease

OBJECTIVE

For early diagnosis and inquiry into the pathophysiology of Sjögren disease (SjD), salivary secretion and component levels, and salivary glands' uptakes in sialoscintigraphy were examined, in this cross-sectional study.

METHODS

Patients who visited our hospital with suspected SjD between April 2016 and March 2020 were checked for unstimulated salivary secretion and β 2 -microglobulin, Na + , and cortisol levels in saliva. The patients who showed any abnormal salivary test results underwent sialoscintigraphy; the uptakes in the parotid, submandibular, and thyroid glands were compared using paired t test.

RESULTS

Sixty-five patients (female/male 51/14, 64.5 ± 13.7 years) were checked for saliva. The secretion was 0.39 ± 0.43 mL/min. The component levels were 1.98 ± 1.45 mg/dL for β 2 -microglobulin (n = 61), 15.9 ± 15.3 mEq/L for Na + (n = 61), and 0.20 ± 0.18 μg/dL for cortisol (n = 56). A significant negative correlation was observed between the secretion and each component level. A significant positive correlation was found between the 2 out of the 3 component levels. Sialoscintigraphy of 52 patients showed significantly lower uptake in the submandibular glands than in the parotid glands (submandibular/parotid ratio: 0.51 ± 0.36, left; 0.54 ± 0.39, right). The total uptake in the 4 salivary glands was lower, but not significantly, than that in the thyroid gland.

CONCLUSIONS

In patients with suspected SjD, a decreased salivary secretion correlated with a high level of any of β 2 -microglobulin, Na + , and cortisol; the 2 of the 3 levels correlated positively. Sialoscintigraphy showed that the submandibular glands were involved to a greater extent than the parotid glands were. The total salivary gland uptake may be lower than that in thyroid.

A Bibliometric Analysis of Clinical Trials on Salivary Biomarkers for Mental Health (2003-2024)

Mental health conditions, such as depression, anxiety, and stress-related disorders, are often difficult to diagnose and monitor using traditional methods. Salivary biomarkers offer a promising alternative due to their non-invasive nature, ease of collection, and the potential to reflect real-time physiological changes associated with mental health. This bibliometric analysis examines 95 clinical trials on stress biomarkers for mental health, published between 2003 and 2024. The field is characterized by extensive collaboration and global participation, involving 593 authors and publications across 73 journals. Despite a consistent annual publication rate, notable increases in 2011, 2014, and 2018 indicate growing research interest. The United States leads in research output, followed by Australia, Germany, and Japan, with Psychoneuroendocrinology being the most prominent journal. Co-occurrence analysis identified nine research clusters, suggesting diverse directions such as the impact of stress-related hormones, circadian rhythms, mindfulness, various therapies, aging, psychological adaptation mechanisms, exercise therapy, anxiety disorders, and the autonomic nervous system on salivary biomarkers. Key terms such as "biomarkers/metabolism," AND "hydrocortisone/metabolism," AND "saliva/metabolism" were central, with significant activity from 2012 to 2018. This analysis highlights a growing focus on the metabolic processes and therapeutic applications of salivary biomarkers in mental health. This bibliometric analysis calls attention to the promising potential of salivary biomarkers to revolutionize mental health diagnostics and treatment through non-invasive methods, fostering interdisciplinary research, technological advancements, and global health improvements.

Novel Approach for Investigating the Effect of Music Therapy on Perioperative Anxiety and Postoperative Satisfaction in Elderly Patients Undergoing Lower-Limb Fracture Surgery Under Intravertebral Anesthesia: A Prospective Clinical Study

OBJECTIVE

This study examines the effect of music therapy on perioperative anxiety and postoperative satisfaction in elderly patients undergoing lower-limb fracture surgery with intravertebral anesthesia to address the increasing incidence of such fractures and related surgical stress.

METHODS

Conducted from February 2022 to June 2023, this prospective study involved 120 elderly patients at the People's Liberation Army General Hospital of Southern Theatre Command. They were divided into the Music group (n = 60, receiving relaxing music during surgery) and the Control group (n = 60, no music). We measured preoperative and postoperative anxiety by using the Visual Analog Scale for Anxiety (VAS-A) along with intraoperative hemodynamic parameters and patient satisfaction postsurgery.

RESULTS

Both groups maintained stable heart rates, systolic and diastolic blood pressures, and mean arterial pressure. However, the Music group displayed significantly lower systolic blood pressure at the beginning of the operation (T5), 5 minutes after the operation (T6) and at the end of the operation (T9) than the Control group. After the surgery, the Music group had notably lower VAS-A scores and saliva cortisol levels, indicating reduced anxiety. Additionally, this group reported higher satisfaction levels.

CONCLUSIONS

Music therapy notably reduced postoperative anxiety and improves patient satisfaction in elderly patients undergoing lower-limb fracture surgery with intravertebral anesthesia. These findings endorse music therapy as a beneficial, non-invasive, and cost-effective method to ameliorate perioperative stress and a complementary approach to traditional medical care in surgical settings.

Psychological Alterations in Youths with Type I Diabetes: Associations with Salivary Cortisol Concentration

Background and Objectives: Type 1 diabetes mellitus (T1DM) is one of the most common chronic diseases in children and adolescents, and is associated with stress and other psychological alterations. This study aims to assess psychological and sleep disorders and health-related quality of life in young people with T1DM and to determine the relationship between these parameters and levels of salivary cortisol, a hormone widely associated with stress and several psychological symptoms. Materials and Methods: In our cross-sectional study performed in 60 Moroccan children and adolescents with T1DM, detailed psychological evaluations were performed to assess symptoms of anxiety, attention-deficit hyperactivity disorder (ADHD), sleep quality and diabetes-specific quality of life (using the RCMAS-2, ADHD rating scale, Pittsburgh scale and the DQoL scale, respectively), and cortisol concentration was measured from saliva samples taken mid-morning. Results: A total of 60 children and adolescents with T1DM were recruited. The mean age was 11.05 ± 0.35 (6-17). The mean salivary cortisol level in ng/mL was 4.7 ± 0.49 (0.7-20.2) and was significantly associated with an anxiety RCMAS2 score for the Worry subdomain and DQoL subdomain "Anxiety". Linear regression analysis showed that salivary cortisol was significantly higher in girls compared to boys (p = 0.004) (beta coefficient: 3.384 CI95%: 1.137-5.630) and with Hb1AC level as a continuous variable (p = 0.0001) (beta coefficient: 1.135 CI95%: 0.509-1.760). The other variables included in the model were not significant (p > 0.05). There was an association between salivary cortisol concentration with anxiety RCMAS2 score for Worry subdomain and QoL sub-domain "Anxiety". Still, a significant (p = 0.018) association emerged for anxiety RCMAS2 score Worry subdomain and QoL anxiety subdomain (p = 0.044). Conclusions: Children and adolescents with T1DM experienced significantly elevated symptoms of anxiety and sleep disturbances, particularly in girls, and frequent symptoms of ADHD, particularly in boys. Salivary cortisol concentration collected in the morning is associated with anxiety burden but not with other psychological alterations. Further studies are needed to clarify the associations between salivary cortisol concentration and anxiety in type 1 diabetes in order to propose the hormone as a biomarker for interventions aimed to reduce anxiety levels in these patients.