Displaying publications 121 - 140 of 665 in total

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  1. Ng KY, Leong MK, Liang H, Paxinos G
    Brain Struct Funct, 2017 Sep;222(7):2921-2939.
    PMID: 28478550 DOI: 10.1007/s00429-017-1439-6
    Melatonin, through its different receptors, has pleiotropic functions in mammalian brain. Melatonin is secreted mainly by the pineal gland and exerts its effects via receptor-mediated and non-receptor-mediated actions. With recent advancement in neuroanatomical mapping, we may now understand better the localizations of the two G protein-coupled melatonin receptors MT1 and MT2. The abundance of these melatonin receptors in respective brain regions suggests that receptor-mediated actions of melatonin might play crucial roles in the functions of central nervous system. Hence, this review aims to summarize the distribution of melatonin receptors in the brain and to discuss the putative functions of melatonin in the retina, cerebral cortex, reticular thalamic nucleus, habenula, hypothalamus, pituitary gland, periaqueductal gray, dorsal raphe nucleus, midbrain and cerebellum. Studies on melatonin receptors in the brain are important because cumulative evidence has pointed out that melatonin receptors not only play important physiological roles in sleep, anxiety, pain and circadian rhythm, but might also be involved in the pathogenesis of a number of neurodegenerative diseases including Alzheimer's disease, Parkinson's disease and Huntington's disease.
    Matched MeSH terms: Anxiety
  2. Yusof KM, Mohd Sidik S, Mahmud R, Abdullah M, Avery-Kiejda KA, Rosli R
    Breast Cancer, 2023 Sep;30(5):810-819.
    PMID: 37306933 DOI: 10.1007/s12282-023-01475-0
    BACKGROUND: Although higher survival rates of breast cancer are achieved these days, breast cancer survivors are challenged with unwanted side effects from treatment or management that affect physical, functional, and psychological well-being of an individual. This study aimed to assess psychological distress status in Malaysian breast cancer survivors and factors that affected the condition.

    METHODS: A cross-sectional study design was conducted on 162 breast cancer survivors from various breast cancer support groups in Malaysia. Psychological distress status was assessed based on depression and anxiety scores by applying the Malay version of Patient Health Questionnaire (PHQ-9) and General Anxiety Disorder (GAD-7). Both instruments were self-administered along with a set of questionnaires comprising demographic, medical history, quality of life, and upper extremity function assessment. Outcomes from the PHQ-9 and GAD-7 were analyzed for severity level of psychological distress, and its association with relevant variables, arm morbidity symptoms, as well as the duration of cancer survivorship.

    RESULTS: The univariate analysis showed that breast cancer survivors with arm morbidities after breast surgery had a higher score of depression (5.0 vs 4.0, p = 0.011) and anxiety (3.0 vs 1.0, p = 0.026) than those who did not. Besides that, receiving fewer post-rehabilitation treatments (p = 0.049) and having a family history of cancer (p = 0.022) were correlated with higher anxiety level. The level of depression and anxiety was inversely proportionate with quality of life and positively correlated with greater disability of the arm function (p 

    Matched MeSH terms: Anxiety/diagnosis; Anxiety/etiology; Anxiety/epidemiology
  3. Powell R, Ahmad M, Gilbert FJ, Brian D, Johnston M
    Br J Health Psychol, 2015 Sep;20(3):449-65.
    PMID: 25639980 DOI: 10.1111/bjhp.12132
    The movement of patients in magnetic resonance imaging (MRI) scanners results in motion artefacts which impair image quality. Non-completion of scans leads to delay in diagnosis and increased costs. This study aimed to develop and evaluate an intervention to enable patients to stay still in MRI scanners (reducing motion artefacts) and to enhance scan completion. Successful scan outcome was deemed to be completing the scan with no motion artefacts.
    Matched MeSH terms: Anxiety/psychology*
  4. Arshad N', Lin TS, Yahaya MF
    CNS Neurol Disord Drug Targets, 2020;19(2):115-126.
    PMID: 31957619 DOI: 10.2174/1871527319666200117105133
    BACKGROUND: Scientific studies support the evidence of the involvement of Metabolic Syndrome (MetS) in the progression of neurodegenerative diseases through oxidative stress. Consumption of antioxidant compounds was found to be beneficial for brain-health as it reduced the brain oxidative stress level and improved cognitive performance in animals. Stingless bee honey or locally known as Kelulut Honey (KH) has high phenolic content and is widely used as a food supplement.

    OBJECTIVES: In this study, we aimed to investigate the effects of KH on the brain of MetS-induced rats.

    METHODS: Forty male Wistar rats were divided into 5 groups; 8 weeks (C8) and 16 weeks control groups (C16), groups that received High-Carbohydrate High Fructose (HCHF) diet for 8 weeks (MS8) and 16 weeks (MS16), and a group that received HCHF for 16 weeks with KH supplemented for the last 35 days (KH).

    RESULTS: Serum fasting blood glucose decreased in the KH group compared to the MS16 group. HDL levels were significantly decreased in MetS groups compared to control groups. Open field experiments showed that KH group exhibits less anxious behavior compared to the MetS group. Probe trial of Morris water maze demonstrated significant memory retention of KH group compared to the MS16 group. Nissl staining showed a significant decrease in the pyramidal hippocampal cells in the MS16 compared to the KH group.

    CONCLUSION: KH has the ability to normalise blood glucose and reduce serum triglyceride and LDL levels in MetS rats, while behavior studies complement its effect on anxiety and memory. This shows a promising role of KH in attenuating neurodegenerative diseases through the antioxidant activity of its polyphenolic content.

    Matched MeSH terms: Anxiety
  5. Bhatt S, Kanoujia J, Mohana Lakshmi S, Patil CR, Gupta G, Chellappan DK, et al.
    CNS Neurol Disord Drug Targets, 2023;22(2):276-288.
    PMID: 35352640 DOI: 10.2174/1871527321666220329140804
    The human gut microbiota plays a significant role in the pathophysiology of central nervous system-related diseases. Recent studies suggest correlations between the altered gut microbiota and major depressive disorder (MDD). It is proposed that normalization of the gut microbiota alleviates MDD. The imbalance of brain-gut-microbiota axis also results in dysregulation of the hypothalamicpituitary- adrenal (HPA) axis. This imbalance has a crucial role in the pathogenesis of depression. Treatment strategies with certain antibiotics lead to the depletion of useful microbes and thereby induce depression like effects in subjects. Microbiota is also involved in the synthesis of various neurotransmitters (NTs) like 5-hydroxy tryptamine (5-HT; serotonin), norepinephrine (NE) and dopamine (DA). In addition to NTs, the gut microbiota also has an influence on brain derived neurotrophic factor (BDNF) levels. Recent research findings have exhibited that transfer of stress prone microbiota in mice is also responsible for depression and anxiety-like behaviour in animals. The use of probiotics, prebiotics, synbiotics and proper diet have shown beneficial effects in the regulation of depression pathogenesis. Moreover, transplantation of fecal microbiota from depressed individuals to normal subjects also induces depression-like symptoms. With the precedence of limited therapeutic benefits from monoamine targeting drugs, the regulation of brain-gut microbiota is emerging as a new treatment modality for MDDs. In this review, we elaborate on the significance of brain-gut-microbiota axis in the progression of MDD, particularly focusing on the modulation of the gut microbiota as a mode of treating MDD.
    Matched MeSH terms: Anxiety
  6. Peltzer K, Pengpid S
    Cent Asian J Glob Health, 2017;6(1):288.
    PMID: 30881756 DOI: 10.5195/cajgh.2017.288
    Introduction: There has been a global increase in illicit drug use among young people. The aim of this study was to estimate the prevalence of lifetime cannabis and amphetamine use, as well as to explore factors associated with substance use among adolescents in five Asian countries: Iraq, Kuwait, Malaysia, Mongolia, and Vietnam.
    Methods: 38,941 school children (mean age 15.4 years, SD=1.5) completed the cross-sectional Global School-Based Student Health Survey (GSHS). Topics covered in the questionnaire included cannabis and amphetamine use. Personal, parental, and environmental attributes were explored as predictors of cannabis and amphetamine use. Logistic regression was used to assess the contribution of potential predictors on lifetime cannabis and lifetime amphetamine use.
    Results: Overall, the prevalence of lifetime cannabis use was 0.9% and lifetime amphetamine use was 1.0% among research participants. Cannabis use was influenced by male gender (Kuwait, Mongolia), parental smoking habits (Kuwait, Iraq), and current cigarette smoking in all countries. Amphetamine use was associated with suicidal ideation (Kuwait, Malaysia, Vietnam), school truancy (Malaysia, Mongolia, Vietnam), being a victim of physical assault (Kuwait, Mongolia), bullying victimization (Iraq, Malaysia, Vietnam), as well as anxiety and current cigarette use in all countries.
    Conclusions: Our preliminary results show the importance of personal attributes such as mental distress and environmental stressors on lifetime cannabis and lifetime amphetamine use. Future prospective studies are needed to identify causal relationships among personal attributes, parental attributes, environmental stressors, and illicit substance use.
    Study name: Global School-Based Student Health Survey (GSHS)
    Matched MeSH terms: Anxiety
  7. Kalinichenko LS, Mühle C, Jia T, Anderheiden F, Datz M, Eberle AL, et al.
    Cereb Cortex, 2023 Jan 05;33(3):844-864.
    PMID: 35296883 DOI: 10.1093/cercor/bhac106
    Alcohol use, abuse, and addiction, and resulting health hazards are highly sex-dependent with unknown mechanisms. Previously, strong links between the SMPD3 gene and its coded protein neutral sphingomyelinase 2 (NSM) and alcohol abuse, emotional behavior, and bone defects were discovered and multiple mechanisms were identified for females. Here we report strong sex-dimorphisms for central, but not for peripheral mechanisms of NSM action in mouse models. Reduced NSM activity resulted in enhanced alcohol consumption in males, but delayed conditioned rewarding effects. It enhanced the acute dopamine response to alcohol, but decreased monoaminergic systems adaptations to chronic alcohol. Reduced NSM activity increased depression- and anxiety-like behavior, but was not involved in alcohol use for the self-management of the emotional state. Constitutively reduced NSM activity impaired structural development in the brain and enhanced lipidomic sensitivity to chronic alcohol. While the central effects were mostly opposite to NSM function in females, similar roles in bone-mediated osteocalcin release and its effects on alcohol drinking and emotional behavior were observed. These findings support the view that the NSM and multiple downstream mechanism may be a source of the sex-differences in alcohol use and emotional behavior.
    Matched MeSH terms: Anxiety/metabolism
  8. Mat S, Ng CT, Fadzil F, Rozalli FI, Tan MP
    Clin Interv Aging, 2017;12:2025-2032.
    PMID: 29238177 DOI: 10.2147/CIA.S149991
    The purpose of this study was to investigate the role of fear of falling (FoF) and psychological symptoms in explaining the relationship between osteoarthritis (OA) symptom severity and falls. Individuals aged ≥65 years with ≥2 falls or ≥1 injurious fall over the past 12 months were included in the falls group, while volunteers aged ≥65 years with no history of falls over 12 months were recruited as controls. The presence of lower extremity OA was determined radiologically and clinically. Severity of symptoms was assessed using the Western Ontario and McMaster Universities Arthritis Index (WOMAC) questionnaire. FoF and psychological status were measured with the shortened version of the Falls Efficacy Scale-International and the 21-item Depression, Anxiety and Stress Scale (DASS-21), respectively. Of 389 (229 fallers, 160 non-fallers) potential participants, mean (SD) age: 73.74 (6.60) years, 141 had clinical OA and 171 had radiological OA. Fallers with both radiological OA and clinical OA had significantly higher FoF and DASS-21 scores than non-fallers. FoF was significantly positively correlated with symptom severity in fallers and non-fallers with radiological and clinical OA. Depression, anxiety, and stress scores were only significantly correlated with symptom severity among fallers but not non-fallers in both clinical and radiological OA. The relationship between mild symptoms and reduced risk of falls compared to no symptoms in those with radiological OA was attenuated by increased anxiety. The increased falls risk associated with severe symptoms compared to mild symptoms in clinical OA was attenuated by FoF. FoF may, therefore, be a potentially modifiable risk factor for OA-associated falls which could be considered in future intervention studies.
    Matched MeSH terms: Anxiety/psychology
  9. Abu Maloh HIA, Soh KL, AbuRuz ME, Chong SC, Ismail SIF, Soh KG, et al.
    Clin Nurs Res, 2022 01;31(1):122-135.
    PMID: 34159828 DOI: 10.1177/10547738211024797
    This study aimed to evaluate the efficacy of Benson's relaxation technique on anxiety and depression among patients undergoing hemodialysis. A systematic review of randomized controlled trials was conducted. Searching databases included EBSCO Host, PubMed, ProQuest, Science Direct, Sage Journals, Ovid, and Google Scholar from January 2000 to September 2020. Five randomized controlled trials were identified. Findings revealed a statistically significant decrease in anxiety score. Concerning depression; one RCT showed a statistically significant decrease and two RCTs revealed a non-significant difference in depression level. The overall quality of the RCTs was not high. Despite that the RCTs showed benefits of BRT in managing anxiety. However, this is not the same for depression. The lack of high-quality scientific evidence supporting its retinue use indicates that additional well designed randomized controlled trials in multiple countries are warranted to support the efficacy of Benson's relaxation technique on anxiety and depression among patients undergoing hemodialysis.
    Matched MeSH terms: Anxiety/therapy
  10. Lew LC, Hor YY, Yusoff NAA, Choi SB, Yusoff MSB, Roslan NS, et al.
    Clin Nutr, 2019 10;38(5):2053-2064.
    PMID: 30266270 DOI: 10.1016/j.clnu.2018.09.010
    BACKGROUND & AIMS: To investigate the effects of probiotic in alleviation of stress in stressed adults, along our focus to identify and justify strain specificity on selected health benefits with a precisely targeted population.

    METHODS: This 12-weeks randomized, double-blind and placebo-controlled study investigated the effects of a probiotic (Lactobacillus plantarum P8; 10 log CFU daily) on psychological, memory and cognition parameters in one hundred and three (P8 n = 52, placebo n = 51) stressed adults with mean age of 31.7 ± 11.1 years old. All subjects fulfilled the criteria of moderate stress upon diagnosis using the PSS-10 questionnaire.

    RESULTS: At the end of study, subjects on P8 showed reduced scores of stress (mean difference 2.94; 95% CI 0.08 to 5.73; P = 0.048), anxiety (mean difference 2.82; 95% CI 0.35 to 5.30; P = 0.031) and total score (mean difference 8.04; 95% CI 0.73 to 15.30; P = 0.041) as compared to placebo after 4-weeks, as assessed by the DASS-42 questionnaire. Although plasma cortisol levels were only marginally different between placebo and P8 (mean difference 3.28 ug/dl; 95% CI -7.09 to 0.52; P = 0.090), pro-inflammatory cytokines such as IFN-γ (mean difference 8.07 pg/ml; 95% CI -11.2 to -4.93; P 

    Matched MeSH terms: Anxiety/drug therapy*
  11. Zulfarina MS, Syarifah-Noratiqah SB, Nazrun SA, Sharif R, Naina-Mohamed I
    Clin Psychopharmacol Neurosci, 2019 May 31;17(2):145-154.
    PMID: 30905115 DOI: 10.9758/cpn.2019.17.2.145
    Panic disorder (PD) being one of the most intensively investigated anxiety disorders is considered a heterogeneous psychiatric disease which has difficulties with early diagnosis. The disorder is recurrent and usually associated with low remission rates and high rates of relapse which may exacerbated social and quality of life, causes unnecessary cost and increased risk for complication and suicide. Current pharmacotherapy for PD are available but these drugs have slow therapeutic onset, several side effects and most patients do not fully respond to these standard pharmacological treatments. Ongoing investigations indicate the need for new and promising agents for the treatment of PD. This article will cover the importance of immediate and proper treatment, the gap in the current management of PD with special emphasis on pharmacotherapy, and evidence regarding the novel anti-panic drugs including the drugs in developments such as metabotropic glutamate (mGlu 2/3) agonist and levetiracetam. Preliminary results suggest the anti-panic properties and the efficacy of duloxetine, reboxetine, mirtazapine, nefazodone, risperidone and inositol as a monotherapy drug. Apart for their effectiveness, the aforementioned compounds were generally well tolerated compared to the standard available pharmacotherapy drugs, indicating their potential therapeutic usefulness for ambivalent and hypervigilance patient. Further strong clinical trials will provide an ample support to these novel compounds as an alternative monotherapy for PD treatment-resistant patient.
    Matched MeSH terms: Anxiety
  12. Chellappah NK, Vignehsa H, Milgrom P, Lam LG
    Community Dent Oral Epidemiol, 1990 Oct;18(5):269-71.
    PMID: 2249413
    505 primary school children in Singapore aged 10-14 were surveyed regarding fear of the dentist. Sixty-eight children were classified as having high fear, giving a sex and race adjusted population prevalence rate of 177 fearful children per 1000 population. Females were 2.64 times more fearful than males. There were no significant racial differences in the prevalence rate. Children with high state anxiety are almost three times as likely to report dental fear as those with low state anxiety. Children with trait anxiety scores above the population mean were just as likely as those reporting below the mean to be fearful. Access to dental care is an important intervening variable in dental fear.
    Matched MeSH terms: Anxiety/epidemiology*
  13. Mohammadzadeh M, Awang H, Kadir Shahar H, Ismail S
    Community Ment Health J, 2018 01;54(1):117-125.
    PMID: 28315972 DOI: 10.1007/s10597-017-0128-5
    This study aimed to assess the prevalence and risk factors of depression, anxiety, stress and low self-esteem among institutional Malaysian adolescents. This cross-sectional descriptive study included 287 adolescents aged 12-18 years living in six selected orphan homes. Study's instruments included Socio-demographic questionnaire, validated Malay version of Depression Anxiety Stress Scale-21 and Rosenberg Self-Esteem Scale. The findings revealed that 85.2, 80.1 and 84.7% of participants had depression, anxiety and stress respectively. Females were more likely to be depressed. Furthermore, anxiety was significantly associated with race and age but no significant associations between stress and the demographic factors were found. The study also showed that 70.8% of males and 69.2% of females had low self-esteem and the self-esteem was associated with depression, anxiety and stress.Therefore, mental health problems are very common among adolescents in Malaysian orphanages. Results reveal the urgency of immediate actions to reduce the mental health problems among Malaysian institutional adolescents.
    Matched MeSH terms: Anxiety/etiology; Anxiety/epidemiology
  14. Lugova H, Andoy-Galvan JA, Patil SS, Wong YH, Baloch GM, Suleiman A, et al.
    Community Ment Health J, 2021 11;57(8):1489-1498.
    PMID: 33417170 DOI: 10.1007/s10597-020-00765-7
    Growing prevalence of mental illnesses and the role they play in the global disease burden is an emerging public health issue. The prevalence of depression and anxiety is on the rise in Malaysia. Low-income urban communities are among the key affected populations with regards to mental health problems. This cross-sectional study was aimed to determine the prevalence and severity of depression, anxiety and stress, and their associated factors among adults in the low-income community of Kuala Lumpur, Malaysia. A total of 248 participants aged 18-60 years old were recruited. Data were collected via face-to-face interviews using the Depression, Anxiety and Stress Scale-21 Items (DASS-21). Chi-squared test was used to examine the association between the variables. Multiple ordinal regression model was introduced to identify the predictors of depression, anxiety and stress. The proportions of participants with depression, anxiety and stress were 24.2% (95% CI: 19.6-30.4), 36.3% (95% CI: 29.9-43.0), and 20.6% (95% CI: 15.4-26.5), respectively. There was a statistically significant association of ethnicity (p = 0.002) and age (p = 0.014) with the severity of depression, ethnicity (p = 0.001) and age (p = 0.024) with the severity of anxiety, and ethnicity (p 
    Matched MeSH terms: Anxiety/epidemiology
  15. Osman ZJ, Mukhtar F, Hashim HA, Abdul Latiff L, Mohd Sidik S, Awang H, et al.
    Compr Psychiatry, 2014 Oct;55(7):1720-5.
    PMID: 24952938 DOI: 10.1016/j.comppsych.2014.04.011
    OBJECTIVE: The 21-item Depression, Anxiety and Stress Scale (DASS-21) is frequently used in non-clinical research to measure mental health factors among adults. However, previous studies have concluded that the 21 items are not stable for utilization among the adolescent population. Thus, the aims of this study are to examine the structure of the factors and to report on the reliability of the refined version of the DASS that consists of 12 items.
    METHOD: A total of 2850 students (aged 13 to 17 years old) from three major ethnic in Malaysia completed the DASS-21. The study was conducted at 10 randomly selected secondary schools in the northern state of Peninsular Malaysia. The study population comprised secondary school students (Forms 1, 2 and 4) from the selected schools.
    RESULTS: Based on the results of the EFA stage, 12 items were included in a final CFA to test the fit of the model. Using maximum likelihood procedures to estimate the model, the selected fit indices indicated a close model fit (χ(2)=132.94, df=57, p=.000; CFI=.96; RMR=.02; RMSEA=.04). Moreover, significant loadings of all the unstandardized regression weights implied an acceptable convergent validity. Besides the convergent validity of the item, a discriminant validity of the subscales was also evident from the moderate latent factor inter-correlations, which ranged from .62 to .75. The subscale reliability was further estimated using Cronbach's alpha and the adequate reliability of the subscales was obtained (Total=76; Depression=.68; Anxiety=.53; Stress=.52).
    CONCLUSION: The new version of the 12-item DASS for adolescents in Malaysia (DASS-12) is reliable and has a stable factor structure, and thus it is a useful instrument for distinguishing between depression, anxiety and stress.
    Matched MeSH terms: Anxiety/diagnosis*
  16. Musa R, Ramli R, Yazmie AW, Khadijah MB, Hayati MY, Midin M, et al.
    Compr Psychiatry, 2014 Jan;55 Suppl 1:S65-9.
    PMID: 23433218 DOI: 10.1016/j.comppsych.2013.01.001
    Studies from Western countries have observed that couples undergoing infertility treatment suffer various physical and psychological difficulties at a higher frequency than the comparable general population. These relate to treatment challenges and other psychosocial stressors, often influenced by coping style, personality factors and available support systems. There is paucity of studies in non-Western populations.
    Matched MeSH terms: Anxiety/psychology
  17. Musa R, Draman S, Jeffrey S, Jeffrey I, Abdullah N, Halim NA, et al.
    Compr Psychiatry, 2014 Jan;55 Suppl 1:S13-6.
    PMID: 23318005 DOI: 10.1016/j.comppsych.2012.12.002
    In 2004, the province of Aceh, Indonesia was rocked by tsunami and in September 2009, West Sumatra, Indonesia was hit by an earthquake. The aim of this study was to determine the long-term psychological impact on the residents inhabiting these regions and to identify factors associated with it.
    Matched MeSH terms: Anxiety/etiology; Anxiety/epidemiology*
  18. Bhat S, Acharya UR, Hagiwara Y, Dadmehr N, Adeli H
    Comput Biol Med, 2018 11 01;102:234-241.
    PMID: 30253869 DOI: 10.1016/j.compbiomed.2018.09.008
    Parkinson's disease (PD) is a neurodegenerative disease of the central nervous system caused due to the loss of dopaminergic neurons. It is classified under movement disorder as patients with PD present with tremor, rigidity, postural changes, and a decrease in spontaneous movements. Comorbidities including anxiety, depression, fatigue, and sleep disorders are observed prior to the diagnosis of PD. Gene mutations, exposure to toxic substances, and aging are considered as the causative factors of PD even though its genesis is unknown. This paper reviews PD etiologies, progression, and in particular measurable indicators of PD such as neuroimaging and electrophysiology modalities. In addition to gene therapy, neuroprotective, pharmacological, and neural transplantation treatments, researchers are actively aiming at identifying biological markers of PD with the goal of early diagnosis. Neuroimaging modalities used together with advanced machine learning techniques offer a promising path for the early detection and intervention in PD patients.
    Matched MeSH terms: Anxiety; Anxiety Disorders
  19. Karim F, Oyewande AA, Abdalla LF, Chaudhry Ehsanullah R, Khan S
    Cureus, 2020 Jun 15;12(6):e8627.
    PMID: 32685296 DOI: 10.7759/cureus.8627
    Social media are responsible for aggravating mental health problems. This systematic study summarizes the effects of social network usage on mental health. Fifty papers were shortlisted from google scholar databases, and after the application of various inclusion and exclusion criteria, 16 papers were chosen and all papers were evaluated for quality. Eight papers were cross-sectional studies, three were longitudinal studies, two were qualitative studies, and others were systematic reviews. Findings were classified into two outcomes of mental health: anxiety and depression. Social media activity such as time spent to have a positive effect on the mental health domain. However, due to the cross-sectional design and methodological limitations of sampling, there are considerable differences. The structure of social media influences on mental health needs to be further analyzed through qualitative research and vertical cohort studies.
    Matched MeSH terms: Anxiety; Anxiety Disorders
  20. Achin NA, Kit TJ, Ngah WZW, Makpol S, Mazlan M, Hamezah HS, et al.
    Curr Aging Sci, 2018;11(3):182-194.
    PMID: 30338748 DOI: 10.2174/1874609811666181019141217
    BACKGROUND: Cognitive frailty emerges as one of the threats to healthy aging. It is in continuum with advancing of age with uncertain indicator between pathological and physiological changes. Alterations in pathways associated with the aging process have been observed including oxidative stress, lipid metabolism, and inflammation. However, the exact mechanisms leading to cognitive decline are still unclear.

    OBJECTIVE: This study was sought to assess the level of cognitive functions and linked with blood oxidative status during normal aging in rats.

    METHODS: A longitudinal study using male Sprague Dawley rats was performed starting from the age of 14 months old to 27 months old. Cognitive functions tests such as open field, Morris water maze and object recognition were determined at the age of 14, 18, 23, and 27 months old and were compared with group 3 months old. Blood was collected from the orbital venous sinus and oxidative status was determined by measuring the level of DNA damage, lipid peroxidation, protein oxidation and antioxidant enzymes activity.

    RESULTS: Aged rats showed declining exploratory behavior and increased in the level of anxiety as compared to the young rats. The level of DNA damage increased with increasing age. Interestingly, our study found that both levels of malondialdehyde and plasma carbonyl content decreased with age. In addition, the level of superoxide dismutase activity was significantly decreased with age whereas catalase activity was significantly increased from 18 months of age. However, no significant difference was found in glutathione peroxidase activity among all age groups.

    CONCLUSION: The progressions of cognitive impairment in normal aging rats are linked to the increment in the level of DNA damage.

    Matched MeSH terms: Anxiety/blood; Anxiety/psychology
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