Apyrexia improves the prognostic value of quick SOFA in older patients with acute pneumonia or bacteremic urinary tract infection.

PURPOSE: Apyrexia is increasingly recognized as an indicator of inadequate inflammatory response in older patients with suspected infection. We aimed to evaluate whether temperature at admission could improve the prognostic value of the Quick Sequential Organ Failure Assessment (qSOFA) for predicting in-hospital mortality after acute infection. METHODS: We created a new score, named qSOFAGE (qSOFA in GEriatrics), by adding apyrexia as an item to the existing qSOFA (+ 1 point if temperature at admission ≤ 38 °C). We compared the prognostic value of the qSOFA, the qSOFAGE and temperature at admission for predicting in-hospital mortality after acute infection in two cohorts including older patients with acute pneumonia (AP) or bacteremic urinary tract infection (UTI). RESULTS: 217 consecutive patients aged ≥ 75 hospitalized for AP (first cohort) and 105 for bacteremic UTI (second cohort) were recorded. Temperature at admission was strongly inversely correlated with in-hospital mortality in both cohorts (Odds Ratios per °C (95% Confidence Interval): 0.60 (0.45-0.80) and 0.46 (0.27-0.79) for AP and UTI. respectively). Adding the temperature ≤ 38 °C item to the qSOFA markedly improved its predictive value for in-hospital mortality in the two groups: C-statistics for qSOFAGE vs. qSOFA: 0.63 (0.53-0.73) vs. 0.56 (0.46-0.67) in AP cohort; 0.74 (0.58-0.89) vs. 0.69 (0.53-0.85) in UTI cohort. For patients with qSOFAGE ≥ 3, in-hospital mortality reached 37% after AP and 55% after bacteremic UTI. CONCLUSION: Temperature at admission was strongly correlated with mortality in these two cohorts of older patients hospitalized for acute infection. The next step will be to validate this score in cohorts of older patients with suspected infection.

Quality of life and perceived burden of the primary caregiver of patients aged 70 and over with cancer 5 years after initial treatment.

PURPOSE: Long-term effects of being the primary caregiver of an older patient with cancer are not known. This study aimed to assess health-related quality of life (HRQoL) in primary caregivers of patients aged 70 and older with cancer, 5 years after initial treatment. Secondly, to compare the HRQoL between former primary caregivers whose caregiving relationship had ceased (primary caregiver no longer directly assisting the patient because of patient death or removal to another city or admission to an institution) and current caregivers, and to determine the perceived burden of the primary caregivers. METHODS: Prospective observational study including primary caregivers of patients aged 70 and older with cancer. HRQoL and perceived burden were assessed using the SF-12 and Zarit Burden Interview (ZBI) at baseline and 5 years after initial treatment. RESULTS: Ninety-six caregivers were initially included; at 5 years, 46 caregivers completed the SF-12 and ZBI between June 15 and October 26, 2020. Primary caregiver's HRQoL scores had significantly decreased over time for physical functioning (mean difference = -10, p=0.04), vitality (MD= -10.5, p=0.02), and role emotional (MD= -8.1, p=0.01) dimensions. The comparison at 5 years according to caregiving status showed no difference for all HRQoL dimensions. There was no decrease in perceived burden at 5 years. CONCLUSION: Some dimensions of HRQoL decreased at 5 years with a stable low perceived burden. TRIAL REGISTRATION: NCT04478903.

[Inappropriate admissions of Ehpad residents to emergency departments]. / Admissions inappropriées des résidents d'Ehpad aux urgences.

After a review of inappropriate admissions of residents of residential care facilities for the dependent elderly (Ehpad) to the emergency room, we propose ways to reduce them. They include giving the coordinating physician a clinical role, organizing continuity and permanence of care in all Ehpad, signing agreements between Ehpad and hospital for direct hospitalization and collaboration with mobile teams and geriatric hotlines, generalizing the level of medical intervention in Ehpad, and deepening the training of Ehpad caregivers in geriatrics.

New horizons in Type 2 myocardial infarction: pathogenesis, assessment and management of an emerging geriatric disease.

Type 2 myocardial infarction (MI) is characterised by a functional imbalance between myocardial oxygen supply and demand in the absence of a thrombotic process, leading to myocardial necrosis. This type of MI was relatively unknown among clinicians until the third universal definition of MI was published in 2017, differentiating Type 2 from Type 1 MI, which follows an acute atherothrombotic event. The pathogenesis, diagnostic and therapeutic aspects of Type 2 MI are described in the present review. Type 2 MI is a condition that is strongly linked to age because of vascular ageing concerning both epicardic vessels and microcirculation, age-related atherosclerosis and stress maladaptation. This condition predominantly affects multimorbid individuals with a history of cardiovascular disease. However, the conditions that lead to the functional imbalance between oxygen supply and demand are frequently extra-cardiac (e.g. pneumonia or anaemia). The great heterogeneity of the underlying etiological factors requires a comprehensive approach that is tailored to each case. In the absence of evidence for the benefit of invasive reperfusion strategies, the treatment of Type 2 MI remains to date essentially based on the restoration of the balance between oxygen supply and demand. For older co-morbid patients with Type 2 MI, geriatricians and cardiologists need to work together to optimise etiological investigations, treatment and prevention of predisposing conditions and precipitating factors.

[Physical activity in the elderly with other major neurocognitive disorders]. / Activité physique chez le sujet âgé atteint d'un trouble neurocognitif majeur.

For decades, the literature was skeptical about the feasibility of motor rehabilitation and its impact, as well as that of physical activity (PA), in subjects with major neurocognitive disorders (MNCD), including Alzheimer's disease. Now, authors report several benefits of PA, both physical and cognitive, by promoting brain perfusion, neurogenesis and synaptic plasticity, as well as decreasing oxidative stress and inflammation. PA should be recommended in cases of TNCM.

[Physical activity in the elderly with a major neurocognitive disorder]. / Activité physique chez le sujet âgé atteint d'un trouble neurocognitif majeur (2/2).

A better knowledge of major neurocognitive disorders and motor learning allows us to propose motor rehabilitation (MR) adapted to subjects with Alzheimer's disease. Recent neuroscientific data on motor functions and cognition allow the construction of physical activity and MR programs, for which the dose-response relationship, content and instructions are determining factors. Further studies are needed to confirm the effectiveness of the methods used.

Food perception, lifestyle, nutritional and health status in the older people: Typologies and factors associated with aging well.

The aging process is associated with physiological, sensory, psychological, and sociological changes likely to have an impact on food intake and the nutritional status. The present study aimed to explore the heterogeneity of the French older population (>65 years old) using a multidisciplinary approach. More specifically, the study aimed to highlight different typologies (i.e. clusters of individuals with similar characteristics) within the older population. We conducted face-to-face interviews and tests with 559 French older people, recruited from different categories of dependency (at home without help, at home with help, in nursing homes). Clustering analysis highlighted seven clusters. Clusters 1-3 contained 'young' older people (<80) with a good nutritional status; these clusters differed according to food preferences, the desire to have a healthy diet, or interest in food. Clusters 4-7 mainly contained 'old' older people (80+), with an increase in the nutritional risk from cluster 4 to cluster 7. Two of these clusters grouped healthy and active people with a good level of appetite, while the two other clusters were associated with a clear decline in nutritional status, with people suffering from eating difficulties or depression. The results raise the need to develop targeted interventions to tackle malnutrition and implement health promotion strategies among the seniors.

[Description of psychomotor disadaptation syndrome or frontal-subcortical dysfunction syndrome]. / Description du syndrome de désadaptation psychomotrice.

The psychomotor disadaptation syndrome (PDS) was first described 34 years ago by the geriatric research team from Dijon, France. This syndrome was initially called "psychomotor regression syndrome". It was renamed PDS in the 1990s following considerable advances in the understanding of its pathophysiology and management. Since the 2000s, a condition known as sub-cortical-frontal dysfunction (syndrome sous-cortico-frontal) has become synonymous with PDS. Effective management of PDS requires a multidisciplinary approach that includes physicians, physiotherapists, psychologists and the entire geriatrics healthcare team.

Impact of an ambulatory physical activity program on balance and motor abilities of retirees: a prospective study.

BACKGROUND: Given the public health problem generated by posture and gait disorders, a preventive approach is essential. OBJECTIVE: We investigated the impact of an ambulatory physical activity program (APAP) on the motor skills of retirees. METHOD: Retirees ≥60 years were recruited in this prospective study. The APAP was supported by a French regional health insurance plan. Between inclusion (T0) and 12 weeks (T1), subjects participated in an APAP (1 h/wk) that included strengthening muscular exercises, balance work, joint flexibility exercises, one-leg-balance test (OLB), stimulation of the foot arch and rise-from-the-floor (RFF). Timed-up-and-go test (TUG) duration, gait speed (GS), OLB duration and RFF success were compared between T1 and T0. RESULTS: Two hundred subjects (86% women) were enrolled; mean age was 73.8 years (45.5% ≥75 years). TUG durations (s) were lower at T1 than at T0 (8.98 and 9.64; P < .0001). The GS (m/s) and OLB durations (s) were higher at T1 than at T0 (1.26 vs 1.12 for GS, 16.16 vs 13.02 for OLB; P < .0001). The rate of participants who successfully completed RFF was higher at T1 (94%) than at T0 (76%) (P < .0001). After the APAP, TUG duration was reduced in 64.5% of cases, the GS improved in 73% of cases, OLB duration increased in 50% of cases and RFF became possible in 18.5% of cases (all P < .0001). CONCLUSION: Physical activity programs are effective for improving motor performance, even in older adults. Retirees must be encouraged to do regular physical activity to prevent or slow the functional decline associated with ageing, and to improve their overall quality of life.

The prescription of direct oral anticoagulants in the elderly: An observational study of 19 798 Ambulatory subjects.

OBJECTIVE: Direct oral anticoagulants (DOACs) are increasingly prescribed to elderly people, but the epidemiologic data for this population remains scarce. We compared the elderly population taking DOACs and those not taking DOACs (noDOAC). METHOD: We included individuals over 75 years old, affiliated to Mutualité Sociale Agricole of Burgundy (a French regional health insurance agency), who had been refunded for a prescribed DOAC between 1st and 30th September 2017. The DAOC group (DAOCG) and noDOAC group (noDOACG) were compared in terms of demographic conditions, registered chronic diseases (RCD), and number and types of prescribed drugs. In the DOACG, we compared the type of prescribing physician and laboratory monitoring for novel prescriptions (initial) and prescription refills (≥ 3 months). RESULTS: Of the 19 798 included patients, 1518 (7.7%) were prescribed DAOCs and 18 280 (92.3%) were not. Mean and median age was 85 years in the 2 groups (DOACG and noDOACG). In the DOACG, there were more men (50% vs 40.2%), more RCD (88.9% vs 68.7%) and more drugs per prescription (6 ± 2.8 vs 5 ± 2.9) (All P < .01). The DOACG also took more antihypertensive drugs. The most commonly prescribed DOACs were apixaban (42.9%) followed by rivaroxaban (38.4%) and dabigatran (18.6%). Complete blood count, serum creatinine and coagulation function tests were requested for 69.4%, 75% and 22.2%, respectively, of patients prescribed DAOCs. CONCLUSIONS: The DOACG had more RCD and drugs per prescription than the noDOACG; routine laboratory monitoring was insufficient. What's known Platelet aggregation inhibitors (low-dose) are recommended for secondary prevention of cardiovascular events in patients suffering from symptomatic atherosclerosis. The main risk of this treatment is bleeding. What's new A prescription for platelet aggregation inhibitors was found in 34% of geriatric inpatients in this prospective study. Compliance to guidelines was better for symptomatic peripheral artery disease than for primary prevention in accordance with recent publications. Geriatric comorbidities had no impact on the prescription of platelet aggregation inhibitors. Underuse of platelet aggregation inhibitors was observed in 11.3% of cases and overuse in 13.7% of cases.

Optimizing sensory quality and variety: An effective strategy for increasing meal enjoyment and food intake in older nursing home residents.

A decline in appetite and consequently in food intake is often observed with ageing, particularly in older adults living in nursing homes. Several strategies have been tested in nursing homes to counter this phenomenon. However, the approaches have rarely focused on food improvement, and most studies have assessed the impact of flavor enhancement on eating behavior. The present experiment aimed to assess the impact of improving sensory quality versus increasing sensory variety on food intake and meal enjoyment in elderly individuals living in a nursing home. Four conditions were compared: control condition, a Quality+ condition (recipes were improved according to sensory preference of the target population), a Variety+ condition (participants were offered a variety of main dishes and several condiments throughout the meal) and a Quality&Variety+ condition combining the two previous conditions. Eighty-two residents (age range: 71-101 years) participated in eight lunchtime sessions (2 replicates × 4 conditions). Compared to control condition, our results showed that improving the sensory quality of the dishes and/or providing variety led to increased meal enjoyment and food intake (energy intake: +5% for Quality+; +7% for Variety+). No additional effect was observed when the two factors were combined (+7% for Quality&Variety+). These results suggest that meal improvement strategies can be used to increase food intake in order to prevent and treat malnutrition in dependent older adults.

Lewy Body Disease: Clinical and Pathological "Overlap Syndrome" Between Synucleinopathies (Parkinson Disease) and Tauopathies (Alzheimer Disease).

Lewy body disease (LBD) is a neurodegenerative disease resulting in dementia. It shares clinical and pathological features with Parkinson disease (PD), the most frequent synucleinopathy, Parkinson disease dementia (PDD), and Alzheimer disease (AD), a tauopathy. Even though the diagnostic criteria for these neurodegenerative diseases are clearly established, and recently revised for LBD, their precise clinical diagnosis is often difficult because LBD, PD, PDD, and AD share epidemiological, clinical, and pathological characteristics. This manuscript discusses current understanding of overlapping symptoms and the particular features of LBD, PD, and AD. It also describes features that could facilitate the diagnosis of each of these diseases. We concluded that the concept of neurodegenerative "overlap" syndrome, which includes the accepted diagnosis of LBD, may be taken in account and should contribute to clarifying LBD and definitions of close differential diagnoses. This should allow clinicians to suspect LBD at an earlier stage and provide better patient care.

The prescription of antiplatelet medication in a very elderly population: An observational study in 15 141 ambulatory subjects.

OBJECTIVE: Despite the frequent use of antiplatelet medication (AM) in the elderly patients, very few studies have investigated its prescription. We describe AM prescription through retrospective study in ambulatory elderly patients. METHOD: All subjects aged over 80 years with a medical prescription delivered in March 2015 and affiliated to the Mutualité Sociale Agricole de Bourgogne. Subjects with prescriptions for AM were compared with those without. RESULTS: A total of 15 141 ambulatory elderly patients (83-89 years, 61.3% of women) were included and 4412 (29.14%) had a prescription for AM. The latter were more frequently men than those without AM (43% vs 36.93%, P < .0001) and more frequently had chronic comorbidities (77.24% vs 64.65%, P < .0001). Compared with ambulatory subjects without AM, those with AM more frequently had coronary heart disease (35.15% vs 14.49%), severe hypertension (30% vs 25.65%), diabetes (27.42% vs 20.64%), peripheral arterial diseases (16.28% vs 5.96%) and disabling stroke (9% vs 5.56% (all P < .0001). In addition, they had more prescriptions of beta-blockers (45.24% vs 36.90%), angiotensin conversion enzyme inhibitor (31.35% vs 25.44%), calcium channel blockers (33.34% vs 27.90%), nitrate derivatives (10.6% vs 6.03%) or hypolipidemic agents (HA; 49.81% vs 29.72%) (all P < .0001) than those without AM. CONCLUSION: In this study, which is very interested for its size and the advanced age of the subjects, long-course AM was prescribed in one third of ambulatory elderly patients. Coronary heart disease, severe hypertension and diabetes were more frequent in AM subjects. However, the low percentage of declared strokes was surprising. We provide additional data to doctors following subjects with AM.

Potentially inappropriate use of furosemide in a very elderly population: An observational study.

OBJECTIVE: Little is known about furosemide prescription modalities in elderly people. We describe furosemide prescription in ambulatory elderly patients. METHODS: All patients aged over 80 years, affiliated to Mutualité Sociale Agricole de Bourgogne, a French regional health insurance plan, with a medical prescription delivered in March 2015, were retrospectively included. RESULTS: Among 15 141 patients with a median age of 86 years, comprising 61.3% of women, 3937 patients (26%) had a prescription for furosemide. Severe heart failure was the most common chronic comorbidity (27.7%). Furosemide was considered a long-term therapy for almost all patients (98.7% with prescriptions for 3 months or more). Recommended indications for long-term furosemide therapy included severe heart failure (50.9%), chronic nephropathy (3%) and cirrhosis (0.1%). The furosemide prescription rate increased with age (81-85: 20.4%, 86-90: 28.5%, 91-95: 35.6%, >95: 42.7%, P<.001), and the increase was associated with a decrease in recommended heart failure therapeutics (beta-blockers, angiotensin-conversion-enzyme-inhibitors or angiotensin-receptor-blockers). Prescribers were mostly general practitioners (81.3%). Plasma electrolytes were controlled in less than a half of the patients with furosemide. CONCLUSIONS: In this large study, long-course furosemide was prescribed in a quarter of ambulatory patients. Half of those taking furosemide suffered from severe heart failure. Age was associated with a linear increase in furosemide use and a decrease in recommended heart failure therapeutic prescriptions. A large part of these prescriptions do not seem to be in accordance with recommendations.

[Evaluation of the prescription of proton pump inhibitors in persons aged 75years and older in a geriatric acute-care unit]. / Évaluation de la prescription des inhibiteurs de la pompe à protons chez la personne âgée de 75 ans et plus dans un service de gériatrie aiguë.

INTRODUCTION AND OBJECTIVES: Proton pump inhibitors (PPI) are widely prescribed in France and could be responsible for adverse drug reactions especially in elderly persons (EP). In order to reduce the misuse of PPI and the excess cost to the Social Security Agency, the French health authorities (Haute Autorité de santé [HAS]) have published strict guidelines for their prescription. We conducted a study in EP to determine the proportion of PPI prescriptions outside HAS guidelines. METHOD: This was a prospective, single-centre observational study in persons aged≥75 years admitted to a geriatric acute-care unit over a period of 6months. The prevalence of prescriptions for PPI and the proportion of prescriptions outside the guidelines were calculated. The sociodemographic and medical characteristics of EP treated with PPI were studied as were the reasons for the prescription of PPI. RESULTS: Among the 818 patients hospitalized during the study period, 270 were taking PPI on admission (33%). Among these prescriptions, 60% were outside the HAS guidelines. Gastro-oesophageal reflux was the leading indication for PPI (30%), followed by dyspepsia (19%). CONCLUSION: This study confirms the high prevalence of prescriptions for PPI and their misuse. As these drugs are apparently well tolerated, prescriptions are often renewed with no medical re-evaluation.

Involvement and prognosis value of CD8(+) T cells in giant cell arteritis.

CD8(+) T cells participate in the pathogenesis of some vasculitides. However, little is known about their role in Giant Cell Arteritis (GCA). This study was conducted to investigate CD8(+) T cell involvement in the pathogenesis of GCA. Analyses were performed at diagnosis and after 3 months of glucocorticoid treatment in 34 GCA patients and 26 age-matched healthy volunteers. Percentages of CD8(+) T-cell subsets, spectratype analysis of the TCR Vß families of CD8(+) T cells, levels of cytokines and chemokines and immunohistochemistry of temporal artery biopsies (TAB) were assessed. Among total CD8(+) T cells, percentages of circulating cytotoxic CD8 T lymphocytes (CTL, CD3(+)CD8(+)perforin(+)granzymeB(+)), Tc17 (CD3(+)CD8(+)IL-17(+)), CD63(+)CD8(+) T cells and levels of soluble granzymes A and B were higher in patients than in controls, whereas the percentage of Tc1 cells (CD3(+)CD8(+)IFN-γ(+)) was similar. Moreover, CD8(+) T cells displayed a restricted TCR repertoire in GCA patients. Percentages of circulating CTL, Tc17 and soluble levels of granzymes A and B decreased after treatment. CXCR3 expression on CD8(+) T cells and its serum ligands (CXCL9, -10, -11) were higher in patients. Analyses of TAB revealed high expression of CXCL9 and -10 associated with infiltration by CXCR3(+)CD8(+) T cells expressing granzyme B and TiA1. The intensity of the CD8 T-cell infiltrate in TAB was predictive of the severity of the disease. This study demonstrates the implication and the prognostic value of CD8(+) T-cells in GCA and suggests that CD8(+) T-cells are recruited within the vascular wall through an interaction between CXCR3 and its ligands.

Development and validation of the FRAGIRE tool for assessment an older person's risk for frailty.

BACKGROUND: Frailty is highly prevalent in elderly people. While significant progress has been made to understand its pathogenesis process, few validated questionnaire exist to assess the multidimensional concept of frailty and to detect people frail or at risk to become frail. The objectives of this study were to construct and validate a new frailty-screening instrument named Frailty Groupe Iso-Ressource Evaluation (FRAGIRE) that accurately predicts the risk for frailty in older adults. METHODS: A prospective multicenter recruitment of the elderly patients was undertaken in France. The subjects were classified into financially-helped group (FH, with financial assistance) and non-financially helped group (NFH, without any financial assistance), considering FH subjects are more frail than the NFH group and thus representing an acceptable surrogate population for frailty. Psychometric properties of the FRAGIRE grid were assessed including discrimination between the FH and NFH groups. Items reduction was made according to statistical analyses and experts' point of view. The association between items response and tests with "help requested status" was assessed in univariate and multivariate unconditional logistic regression analyses and a prognostic score to become frail was finally proposed for each subject. RESULTS: Between May 2013 and July 2013, 385 subjects were included: 338 (88%) in the FH group and 47 (12%) in the NFH group. The initial FRAGIRE grid included 65 items. After conducting the item selection, the final grid of the FRAGIRE was reduced to 19 items. The final grid showed fair discrimination ability to predict frailty (area under the curve (AUC) = 0.85) and good calibration (Hosmer-Lemeshow P-value = 0.580), reflecting a good agreement between the prediction by the final model and actual observation. The Cronbach's alpha for the developed tool scored as high as 0.69 (95% Confidence Interval: 0.64 to 0.74). The final prognostic score was excellent, with an AUC of 0.756. Moreover, it facilitated significant separation of patients into individuals requesting for help from others (P-value < 0.0001), with sensitivity of 81%, specificity of 61%, positive predictive value of 93%, negative predictive value of 34%, and a global predictive value of 78%. CONCLUSIONS: The FRAGIRE seems to have considerable potential as a reliable and effective tool for identifying frail elderly individuals by a public health social worker without medical training.

Association of body mass index with long-term outcomes in older adults hospitalized for COVID-19: an observational study.

Both underweight and obesity have been associated with poor prognosis in COVID-19. In an older populations of patients hospitalized for SARS-CoV-2 infection, we aimed to evaluate the association between body mass index (BMI) and short and long-term prognosis. Among 434 consecutive patients aged ≥ 70 years and hospitalized for suspected COVID-19 at a university hospital, 219 patients (median age of 83 years, 53% male) testing positive for COVID-19 and for whom BMI was recorded at admission, agreed to participate. Among them, 39 had a BMI < 20 kg/m2, 73 had a BMI between 20 and 24.9 kg/m2 and 107 had a BMI ≥ 25 kg/m2. After adjustment for confounders, BMI < 20 kg/m2 was associated with a higher risk of one-year mortality (hazard ratio (HR) [95% confidence interval]: 1.75 [1.00-3.05], p = 0.048), while BMI ≥ 25 kg/m2 was not (HR: 1.04 [0.64-1.69], p = 0.9). However, BMI was linearly correlated with both in-hospital acute respiratory failure (p = 0.02) and cardiovascular events (p = 0.07). In this cohort of older patients hospitalized for COVID-19, low BMI, rather than high BMI, appears as an independent risk factor for death after COVID-19. The pathophysiological patterns underlying this excess mortality remain to be elucidated.

Th1 and Th17 lymphocytes expressing CD161 are implicated in giant cell arteritis and polymyalgia rheumatica pathogenesis.

OBJECTIVE: Giant cell arteritis (GCA) is the most frequently occurring vasculitis in elderly individuals, and its pathogenesis is not fully understood. The objective of this study was to decipher the role of the major CD4+ T cell subsets in GCA and its rheumatologic form, polymyalgia rheumatica (PMR). METHODS: A prospective study of the phenotype and the function of major CD4+ T cell subsets (Th1, Th17, and Treg cells) was performed in 34 untreated patients with GCA or PMR, in comparison with 31 healthy control subjects and with the 27 treated patients who remained after the 7 others withdrew. RESULTS: Compared with control subjects, patients with GCA and patients with PMR had a decreased frequency of Treg cells and Th1 cells, whereas the percentage of Th17 cells was significantly increased. Furthermore, an analysis of temporal artery biopsy specimens obtained from patients affected by GCA for whom biopsy results were positive demonstrated massive infiltration by Th17 and Th1 lymphocytes without any Treg cells. After glucocorticoid treatment, the percentages of circulating Th1 and Th17 cells decreased, whereas no change in the Treg cell frequency was observed. The frequency of CD161+CD4+ T cells, which are considered to be Th17 cell precursors, was similar in patients and control subjects. However, these cells highly infiltrated GCA temporal artery biopsy specimens, and their ability to produce interleukin-17 in vitro was significantly enhanced in patients with GCA and patients with PMR and was correlated with a decrease in the phosphorylated form of STAT-1. CONCLUSION: This study is the first to demonstrate that the frequency of Treg cells is decreased in patients with GCA and patients with PMR, and that CD161+CD4+ T lymphocytes, differentiated into Th1 cells and Th17 cells, are involved in the pathogenesis of GCA and PMR.