An Atherosclerosis Indicator Hyaluronic Acid: Can Plasma Hyaluronic Acid Be Useful in Diagnosing Alzheimer's Disease?

BACKGROUND: The aim is to compare the plasma levels of hyaluronic acid (HA) which is closely related to inflam-mation and vascular changes and arterial stiffness (AS) related values in patients with Alzheimer's disease (AD), amnestic type mild cognitive impairment (aMCI), and normal cognitive functions (NCF). METHODS: Ninety participants were categorized into three groups, patients with AD, MCI, and NCF. Arterial stiffness measurement in the nephrology outpatient clinic, and storage and analysis of plasma samples in the biochemistry laboratory. RESULTS: Of the 90 patients, 32 had NCF, 32 had aMCI, and 26 had AD. Between groups, there was no difference in HA, pulse wave velocity, and augmentation index. The HA level had no statistically significant correlation with any of the other variables. CONCLUSIONS: Plasma HA levels will not be useful in the diagnosis of AD. More comprehensive studies with larger number of patients are needed.

Place of Death of Geriatric Population in Turkey: A 7-Year Observational Study.

BACKGROUND: End-of-life care has become an important public health issue in recent years. Place of death is a major component of end-of-life care. Despite attempts to improve end-of-life care, there has not been published any data about place of deaths in Turkey. Aim: This retrospective, cross-sectional study investigates the place of death and trends over the years in geriatric age groups in Turkey. Methods: Patients who were admitted to geriatric outpatient clinic of a university hospital during a 7-year period were included. Place and date of death information were received from the death notification system and recorded as hospital or out-of-hospital death. Demographic and clinical data were collected from the hospital information system. Deaths occurring after March 1, 2020 were not included to eliminate the effect of coronavirus disease-2019 pandemic. Results: A total of 4025 (20.7%) patients were determined to be dead. Approximately three-quarters of deaths (73.0%) occurred in hospital. The number of deaths reported from nursing homes was only 13 (3.0%). Patients with dementia less frequently died in hospital, however, it was not statistically significant (12.4% vs 14.7%, P = .05). The prevalence of death in hospital was significantly higher in patients with chronic renal failure (3.1% vs 1.7%, P = .02). The presence of comorbid conditions such as heart failure, cerebrovascular disease, Parkinson's disease, chronic obstructive pulmonary disease/asthma, and cancer did not affect the place of death (P = .24, .21, .24, .51, and .18). Out-of-hospital mortality increased with advanced age (P < .001). No significant difference was found in the place of death over the years (P = .41). Conclusion: To the best of our knowledge, this is the first study examining the place of death in Turkey, an aging country. Our results may help to establish policies about end-of-life care in elderly people to improve quality of life by using resources effectively.

Thiol-disulfide homeostasis and ischemia-modified albumin as a marker of oxidative stress in patients with sarcopenia.

AIM: Sarcopenia is characterized by progressive and generalized loss of skeletal muscle mass and strength. Chronic inflammatory conditions and increased oxidative stress are in the pathogenesis of sarcopenia. Our aim was to evaluate the relationship between sarcopenia and thiol-disulfide homeostasis and ischemia-modified albumin levels as an oxidative stress marker. METHODS: Patients aged ≥65 years were recruited in this study. Sarcopenia was diagnosed according to the European Working Group on Sarcopenia in Older People criterion. Total thiol, native thiol, disulfide and ischemia-modified albumin levels were measures according to clinical and laboratory features. Patients were divided into two groups according to their sarcopenia presence; thiol-disulfide homeostasis and ischemia-modified albumin levels were evaluated between these groups. RESULTS: Overall, 94 patients were analyzed. The mean age was 75.0 ± 6.71 years. A total of 39% of the patients were diagnosed as probable sarcopenia, 3.2% had sarcopenia, 6.4% had severe sarcopenia and 51.1% were diagnosed as normal. The levels of native thiol, total thiol, disulfide level and disulfide-native thiol, native thiol-total thiol and disulfide-total thiol ratios were similar in patients with sarcopenia when compared with the control group. In addition, there were no differences between albumin and ischemia-modified albumin levels. In univariate regression analysis, handgrip strength was found to be an independent predictor of native thiol and total thiol, and disulfide levels. CONCLUSION: This is the first study in the literature that evaluates the thiol-disulfide homeostasis and ischemia-modified albumin levels in sarcopenic older patients. Long-term studies are warranted to confirm the relationship between oxidative stress markers and sarcopenia. Geriatr Gerontol Int 2021; 21: 584-589.