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1.
Blood Press ; 33(1): 2350981, 2024 May 03.
Article En | MEDLINE | ID: mdl-38824645

OBJECTIVE: Few studies have evaluated the performance of non-drug-adjusted primary aldosteronism (PA) screening. Therefore, we aimed to examine the consistency between PA screening results with and without drug adjustment and to explore the effectiveness of screening without drug adjustment. METHODS: This prospective study included 650 consecutive patients with a high risk of incidence PA. Patients who initially screened positive underwent rescreening with drug adjustments and confirmatory tests. Regarding the remaining patients, one of every three consecutive patients underwent rescreening with drug adjustments and confirmatory tests. The changes in aldosterone and renin concentrations were compared between patients with essential hypertension (EH) and those with PA before and after drug adjustment. Sensitivity and specificity were used to assess the diagnostic performance of screening without drug adjustment, using the confirmatory test results as the reference. RESULTS: We screened 650 patients with hypertension for PA. Forty-nine patients were diagnosed with PA and 195 with EH. Regarding drugs, 519 patients were taking angiotensin-converting enzyme inhibitors (ACEIs), angiotensin II receptor blockers (ARBs), calcium channel blockers (CCBs), or diuretics alone or in combination. Forty-one patients were taking beta-blockers. Ninety patients were taking beta-blockers in combination with other drugs. In patients treated with ACEIs, ARBs, CCBs, or diuretics alone, or in combination, or beta-blockers alone, PA positivity was determined using the criteria, aldosterone-to-renin ratio (ARR) >38 pg/mL/pg/mL and plasma aldosterone concentration (PAC) >100 pg/mL, and negativity, using the criteria, ARR <9 pg/mL/pg/mL; the sensitivity and specificity were 94.7% and 94.5%, respectively. After drug adjustment, the sensitivity and specificity of screening were 92.1% and 89%, respectively. CONCLUSIONS: In patients not treated with beta-blockers combined with others, when ARR >38 pg/mL/pg/mL and plasma aldosterone concentration (PAC) >100 pg/mL, or, ARR <9 pg/mL/pg/mL, non-drug-adjusted screening results were identical to with drug adjustment. Non-drug-adjusted screening could reduce the chance of medication adjustment, enable patients to continue their treatments and avoiding adverse effects, is of clinical importance.


Primary aldosteronism (PA) is the most common form of endocrine hypertension. The risk of stroke, myocardial infarction, heart failure, atrial fibrillation, and deterioration of kidney function is higher in PA than in essential hypertension (EH), even with the same blood pressure (BP) levels. However, many patients remain undiagnosed because most antihypertensive drugs substantially interfere with PA screening results, which makes drug adjustment necessary. This can be a time-consuming and unsafe process, requiring 4­6 weeks, and could lead to a hypertensive crisis and other complications. Some studies have suggested that certain antihypertensive drugs can be continued during PR screening. However, few studies have evaluated the performance of non-drug-adjusted PA screening. Therefore, in this prospective study, we aimed to compare patients with hypertension and a high risk of PA before and after drug adjustment and to use confirmatory test results as a reference to explore the diagnostic or exclusion effect. We found that non-drug-adjusted screening performs similarly to drug-adjusted screening in a particular group of patients. Our findings could aid in preventing unnecessary drug adjustment for PA screening, thereby reducing the risk in these patients.


Aldosterone , Hyperaldosteronism , Humans , Hyperaldosteronism/diagnosis , Hyperaldosteronism/blood , Hyperaldosteronism/drug therapy , Female , Middle Aged , Male , Prospective Studies , Aldosterone/blood , Renin/blood , Adult , Calcium Channel Blockers/therapeutic use , Hypertension/drug therapy , Hypertension/blood , Hypertension/diagnosis , Antihypertensive Agents/therapeutic use , Angiotensin-Converting Enzyme Inhibitors/therapeutic use , Mass Screening/methods , Aged , Angiotensin Receptor Antagonists/therapeutic use
2.
J Cardiovasc Pharmacol Ther ; 29: 10742484241258381, 2024.
Article En | MEDLINE | ID: mdl-38828542

BACKGROUND: Moxonidine, an imidazoline I1 receptor agonist, is an effective antihypertensive drug that was shown to improve insulin sensitivity. RAAS-blockers are recommended as first-line therapy in patients with diabetes, alone or in combination with a calcium-channel antagonist or a diuretic. AIMS: This study compared the effects of moxonidine and ramipril on blood pressure (BP) and glucose metabolism in overweight patients with mild-to-moderate hypertension and impaired fasting glucose or type 2 diabetes. METHODS: Treatment-naïve patients for hypertension and dysglycemia were randomized to 12 weeks of double-blind moxonidine 0.4 mg or ramipril 5 mg once-daily treatment. At 12 weeks, for a further 12 weeks non-responders received combination of mox/ram, while responders continued blinded treatment. RESULTS: Moxonidine and ramipril were equivalent in lowering SiDBP and SiSBP at the end of the first 12 weeks. The responder rate was approximately 50% in both groups, with a mean SiDBP and SiSBP decrease of 10 and 15 mm Hg in the responders, respectively. The normalization rate (SiDBP < 85 mm Hg) was non significantly different between treatments groups. Moxonidine reduced heart rate (HR) (average -3.5 bpm, p = 0.017) during monotherapy, and when added to ramipril. HbA1c decreased significantly at Week 12 in both groups. Neither drug affected glucose or insulin response to the oral glucose tolerance test. In non-responders, moxonidine/ramipril combination further reduced BP without compromising metabolic parameters. CONCLUSION: Moxonidine 0.4 mg and ramipril 5 mg were equally effective on BP lowering and were well tolerated and mostly metabolically neutral either as monotherapies or in combination. HR was lowered on moxonidine treatment.


Antihypertensive Agents , Blood Glucose , Blood Pressure , Diabetes Mellitus, Type 2 , Drug Therapy, Combination , Heart Rate , Hypertension , Imidazoles , Overweight , Ramipril , Humans , Ramipril/administration & dosage , Ramipril/therapeutic use , Ramipril/pharmacology , Hypertension/drug therapy , Hypertension/physiopathology , Male , Middle Aged , Female , Blood Pressure/drug effects , Heart Rate/drug effects , Double-Blind Method , Imidazoles/pharmacology , Imidazoles/therapeutic use , Imidazoles/administration & dosage , Antihypertensive Agents/therapeutic use , Antihypertensive Agents/pharmacology , Antihypertensive Agents/adverse effects , Blood Glucose/drug effects , Blood Glucose/metabolism , Overweight/drug therapy , Overweight/physiopathology , Overweight/complications , Diabetes Mellitus, Type 2/drug therapy , Diabetes Mellitus, Type 2/blood , Diabetes Mellitus, Type 2/complications , Diabetes Mellitus, Type 2/physiopathology , Aged , Adult , Treatment Outcome , Angiotensin-Converting Enzyme Inhibitors/therapeutic use , Angiotensin-Converting Enzyme Inhibitors/pharmacology , Angiotensin-Converting Enzyme Inhibitors/adverse effects
3.
J Vis Exp ; (207)2024 May 17.
Article En | MEDLINE | ID: mdl-38829134

H-type hypertension, which is a specific form of hypertension characterized by elevated plasma homocysteine (Hcy) levels, has become a major public health challenge worldwide. This study investigated the hypotensive effects and underlying mechanisms of Huotan Jiedu Tongluo decoction (HTJDTLD), a highly effective traditional Chinese medicine formula commonly used to treat vascular stenosis. Methionine was used to induce H-type hypertension in rats, and HTJDTLD was administered intragastrically. Then, the systolic and diastolic blood pressures of the caudal artery of rats were measured by noninvasive rat caudal manometry. Histological assessment of the aorta was performed by hematoxylin-eosin (HE) staining. Enzyme-linked immunosorbent assay (ELISA) was used to measure Hcy levels, and quantitative reverse transcriptase polymerase chain reaction (qRT-PCR) and western blotting were used to determine the mRNA and protein levels of Glucose regulatory protein 78 (GRP78), Tumor necrosis factor (TNF) receptor-associated factor 2 (TRAF2), c-Jun N-terminal kinases (JNK), and caspase-3. The results showed that HTJDTLD significantly lowered blood pressure, alleviated histopathological lesions, and decreased Hcy levels after methionine treatment. Moreover, HTJDTLD significantly inhibited the gene and protein expression of GRP78, JNK, TRAF2, and caspase 3, which are involved mainly in the endoplasmic reticulum (ER) stress-induced apoptosis pathway. Overall, the results indicated that HTJDTLD had effective antihypertensive effects in rats with H-type hypertension and revealed the antihypertensive mechanisms associated with inhibition of ER stress-induced apoptosis pathway activation.


Antihypertensive Agents , Drugs, Chinese Herbal , Hypertension , Animals , Drugs, Chinese Herbal/pharmacology , Rats , Hypertension/drug therapy , Hypertension/metabolism , Antihypertensive Agents/pharmacology , Male , Rats, Sprague-Dawley , Homocysteine/blood
4.
BMC Anesthesiol ; 24(1): 198, 2024 Jun 04.
Article En | MEDLINE | ID: mdl-38834996

BACKGROUND: Remimazolam, a newer benzodiazepine that targets the GABAA receptor, is thought to allow more stable blood pressure management during anesthesia induction. In contrast, propofol is associated with vasodilatory effects and an increased risk of hypotension, particularly in patients with comorbidities. This study aimed to identify medications that can maintain stable vital signs throughout the induction phase. METHODS: We conducted a single-center, two-group, randomized controlled trial to investigate and compare the incidence of hypotension between remimazolam- and propofol-based total intravenous anesthesia (TIVA). We selected patients aged between 19 and 75 years scheduled for neurosurgery under general anesthesia, who were classified as American Society of Anesthesiologists Physical Status I-III and had a history of hypertension. RESULTS: We included 94 patients in the final analysis. The incidence of hypotension was higher in the propofol group (91.3%) than in the remimazolam group (85.4%; P = 0.057). There was no significant difference in the incidence of hypotension among the various antihypertensive medications despite the majority of patients being on multiple medications. In comparison with the propofol group, the remimazolam group demonstrated a higher heart rate immediately after intubation. CONCLUSIONS: Our study indicated that the hypotension incidence of remimazolam-based TIVA was comparable to that of propofol-based TIVA throughout the induction phase of EEG-guided anesthesia. Both remimazolam and propofol may be equally suitable for general anesthesia in patients undergoing neurosurgery. TRIAL REGISTRATION: Clinicaltrials.gov (NCT05164146).


Anesthetics, Intravenous , Benzodiazepines , Hypertension , Hypotension , Neurosurgical Procedures , Propofol , Humans , Propofol/adverse effects , Propofol/administration & dosage , Middle Aged , Female , Male , Hypotension/chemically induced , Hypotension/epidemiology , Single-Blind Method , Prospective Studies , Incidence , Hypertension/drug therapy , Hypertension/epidemiology , Benzodiazepines/adverse effects , Benzodiazepines/administration & dosage , Adult , Anesthetics, Intravenous/adverse effects , Neurosurgical Procedures/adverse effects , Neurosurgical Procedures/methods , Aged , Young Adult
5.
Sci Rep ; 14(1): 12625, 2024 06 01.
Article En | MEDLINE | ID: mdl-38824234

Treatment intensification is essential to ensure guideline targets are attained in diabetes patients. The failure to intensify treatment when the targets are not achieved is therapeutic inertia. This study aimed to determine the proportions and factors associated with treatment intensification and therapeutic inertia of antihypertensive therapy in type 2 diabetes patients with uncontrolled hypertension in Malaysia. A retrospective cohort analysis was conducted utilising registry data. Diabetes hypertensive patients with uncontrolled baseline systolic or diastolic blood pressure were included. Treatment intensification was the increase in the number of antihypertensive agents from the index treatment. Therapeutic inertia was the absence of treatment intensification when the second blood pressure reading was still uncontrolled. About 6956 patients were followed up over 2.5 ± 1.1 person-years. Treatment intensification was observed in 29.8% of patients, while 38.6% had therapeutic inertia. Chinese, Indian, and 'others' ethnic groups, retinopathy, more antihypertensive agents, and higher systolic blood pressure were associated with therapeutic inertia. Underweight, overweight patients and those with dyslipidaemia had lower risks for therapeutic inertia. The results indicate suboptimal quality of care in public health clinics in Malaysia. Further studies are needed to determine the underlying causes to formulate precise interventions to tackle the problem in Malaysia.


Antihypertensive Agents , Blood Pressure , Diabetes Mellitus, Type 2 , Hypertension , Humans , Diabetes Mellitus, Type 2/drug therapy , Diabetes Mellitus, Type 2/complications , Hypertension/drug therapy , Antihypertensive Agents/therapeutic use , Female , Male , Middle Aged , Blood Pressure/drug effects , Retrospective Studies , Malaysia , Aged
6.
J Vasc Nurs ; 42(2): 89-98, 2024 Jun.
Article En | MEDLINE | ID: mdl-38823977

BACKGROUND AND AIM: Patient education utilizing nursing theory can enhance patient adherence to treatment and potentially decrease mortality rates. The objective of this investigation was to assess the impact of Roy's adaptation Model-focused education on medication adherence and psychosocial compliance in hypertensive patients. METHODS: This study was conducted in N = 60 hypertensive patients (n = 30 control group and n = 30 experimental group) based on a randomized controlled trial design. In the pre-test phase of the study, data was collected using the Patient Information Form, the medication adherence rating scale (MARS), and the psychosocial adjustment to illness scale-self-report (PAIS-SR). After the pre-test phase, the experimental group received hypertension education and the "Hypertension Education Booklet" for a duration of four weeks. No education was provided to the control group patients; only routine follow-ups were conducted. In the post-test phase (after four weeks), both groups were reassessed using MARS and PAIS-SR. After completing the study, the control group patients who volunteered to participate in the education were provided with hypertension education and the "Hypertension Education Booklet" for a duration of four weeks (n = 4). RESULTS: The post-test measurements of patients in the experimental group (after 4 weeks of education) revealed an increase in the mean MARS scores (6.50 ± 0.86) and a significant decrease in the total and subscale mean scores of PAIS-SR (24.12 ± 7.08) (p < 0.05). No changes were observed in the control group patients. CONCLUSION: The results of the study revealed that the education based on the Roy's Adaptation Model increased hypertensive individuals' medication adherence and physiological, psychological, and social adjustment to the disease. RELEVANCE TO CLINICAL PRACTICE: The education based on the Roy's Adaptation Model seems to be effective in increasing patients' adherence to treatment and adjustment to the disease. This model can be used in various diseases and societies, since it increases adjustment to the disease and the effectiveness of treatment.


Adaptation, Psychological , Antihypertensive Agents , Hypertension , Medication Adherence , Patient Education as Topic , Humans , Hypertension/drug therapy , Hypertension/psychology , Female , Medication Adherence/psychology , Male , Patient Education as Topic/methods , Middle Aged , Antihypertensive Agents/therapeutic use , Aged , Adult
7.
Kardiologiia ; 64(5): 26-32, 2024 May 31.
Article Ru | MEDLINE | ID: mdl-38841786

Based on a clinical case report, the article shows the individual selection of effective therapy for a patient with arterial hypertension and dyslipidemia. Taking into account the risk factors for cardiovascular diseases, Equamer® was selected as a fixed combination of amlodipine + lisinopril + rosuvastatin capsules 10 mg+20 mg+10 mg (Gedeon Richter Plc, Budapest, Hungary). In the patient with hypertension, ischemic heart disease was verified, and stenting of the anterior descending artery was performed. According to the clinical guidelines, when arterial hypertension is associated with ischemic heart disease, the drug therapy of choice should be a combination of dihydropyridine slow calcium channel blockers with an angiotensin-converting enzyme inhibitor. The fixed triple combination of amlodipine, lisinopril, and rosuvastatin is one of the most appropriate in this clinical situation; this combination targets the two major risk factors for cardiovascular diseases, arterial hypertension and dyslipidemia.


Amlodipine , Drug Combinations , Dyslipidemias , Hypertension , Humans , Hypertension/drug therapy , Dyslipidemias/drug therapy , Dyslipidemias/complications , Amlodipine/administration & dosage , Male , Antihypertensive Agents/therapeutic use , Lisinopril/administration & dosage , Lisinopril/therapeutic use , Treatment Outcome , Rosuvastatin Calcium/administration & dosage , Rosuvastatin Calcium/therapeutic use , Middle Aged , Calcium Channel Blockers/therapeutic use
8.
JAMA Netw Open ; 7(6): e2413515, 2024 Jun 03.
Article En | MEDLINE | ID: mdl-38829618

Importance: Hypertension management has traditionally been based on office visits. Integrating remote monitoring into routine clinical practices and leveraging social support might improve blood pressure (BP) control. Objective: To evaluate the effectiveness of a bidirectional text monitoring program focused on BP control and medication adherence with and without social support in adults with hypertension. Design, Setting, and Participants: This randomized clinical trial included adults aged 18 to 75 treated at an academic family medicine practice in Philadelphia in 2018 and 2019. Patients had been seen at least twice in the prior 24 months and had at least 2 elevated BP measurements (>150/90 mm Hg or >140/90 mm Hg for patients aged 18-59 years or with diabetes or chronic kidney disease) during visits. All participants had a cell phone with text messaging, offered at least 1 support partner, and were taking maintenance medications to treat hypertension. Patients were randomized 2:2:1 to remote monitoring of BP and medication adherence (RM), remote monitoring of BP and medication adherence with feedback provided to a social support partner (SS), or usual care (UC). Data were analyzed on an intention-to-treat basis between October 14, 2019, and May 30, 2020, and were revisited from May 23 through June 2, 2023. Interventions: The RM and SS groups received an automatic home BP monitor, 3 weekly texts requesting BP measurements, 1 weekly text inquiring about medication adherence, and a weekly text with feedback. In the SS arm, support partners received a weekly progress report. The UC group received UC through their primary care practice. Clinicians caring for the patients in the intervention groups received nudges via electronic health records to adjust medications when 3 of 10 reported BP measurements were elevated. Patients were followed up for 4 months. Main Outcomes and Measures: The primary outcome was systolic BP at 4 months measured during the final follow-up visit. Secondary outcomes included achievement of normotension and diastolic BP. Results: In all, 246 patients (mean [SD] age, 50.9 [11.4] years; 175 females [71.1%]; 223 Black individuals [90.7%] and 13 White individuals [5.3%]) were included in the intention-to-treat analysis: 100 patients in the RM arm, 97 in the SS arm, and 49 in the UC arm. Compared with the UC arm, there was no significant difference in systolic or diastolic BP at the 4-month follow-up visit in the RM arm (systolic BP adjusted mean difference, -5.25 [95% CI, -10.65 to 0.15] mm Hg; diastolic BP adjusted mean difference, -1.94 [95% CI, -5.14 to 1.27] mm Hg) or the SS arm (systolic BP adjusted mean difference, -0.91 [95% CI, -6.37 to 4.55] mm Hg; diastolic BP adjusted mean difference, -0.63 [95% CI, -3.77 to 2.51] mm Hg). Of the 206 patients with a final BP measurement at 4 months, BP was controlled in 49% (41 of 84) of patients in the RM arm, 31% (27 of 87) of patients in the SS arm, and 40% (14 of 35) of patients in the UC arm; these rates did not differ significantly between the intervention arms and the UC group. Conclusions and Relevance: In this randomized clinical trial, neither remote BP monitoring nor remote BP monitoring with social support improved BP control compared with UC in adults with hypertension. Additional efforts are needed to examine whether interventions directed at helping patients remember to take their BP medications can lead to improved BP control. Trial Registration: ClinicalTrials.gov Identifier: NCT03416283.


Hypertension , Medication Adherence , Social Support , Text Messaging , Humans , Hypertension/drug therapy , Middle Aged , Female , Male , Medication Adherence/statistics & numerical data , Adult , Aged , Antihypertensive Agents/therapeutic use , Blood Pressure Monitoring, Ambulatory/methods , Blood Pressure/physiology , Blood Pressure/drug effects , Telemedicine , Young Adult
9.
Ann Med ; 56(1): 2362880, 2024 Dec.
Article En | MEDLINE | ID: mdl-38830046

BACKGROUND: Nocturnal blood pressure (BP) is correlated with an increased risk of cardiovascular events and is an important predictor of cardiovascular death in hypertensive patients. OBJECTIVE: Nocturnal BP control is of great importance for cardiovascular risk reduction. This systematic review and meta-analysis aimed to explore the efficacy of angiotensin receptor blockers (ARBs) for nocturnal BP reduction in patients with mild to moderate hypertension. METHODS: PICOS design structure was used to formulate the data extraction. All statistical calculations and analyses were performed with R. RESULTS: Seventy-seven studies with 13,314 participants were included. The overall analysis indicated that nocturnal BP drop varied considerably among different ARBs. Allisartan (13.04 [95% CI (-18.41, -7.68)] mmHg), olmesartan (11.67 [95% CI (-14.12, -9.21)] mmHg), telmisartan (11.11 [95% CI (-12.12, -10.11)] mmHg) were associated with greater reduction in nocturnal systolic BP. In the aspect of the nocturnal-diurnal BP drop ratio, only allisartan was greater than 1. While, the variation tendency of last 4-6 h ambulatory BP was basically consistent with nocturnal BP. Additionally, allisartan showed improvement effect in the proportion of patients with dipping BP pattern. CONCLUSIONS: This study demonstrates that for patients with mild to moderate hypertension, allisartan, olmesartan and telmisartan have more advantages in nocturnal BP reduction among the ARBs, while allisartan can reduce nighttime BP more than daytime BP and improve the dipping pattern.


This meta-analysis explores the efficacy of Angiotensin II AT1 receptor antagonists (ARBs) on nocturnal blood pressure (BP) reduction in mild to moderate hypertension.The results demonstrate that for patients with mild to moderate hypertension, allisartan, olmesartan and telmisartan have more advantages in nocturnal BP reduction among the ARBs.Allisartan can reduce nighttime BP more effectively than daytime BP, which also improve the dipping pattern.


Angiotensin Receptor Antagonists , Blood Pressure , Circadian Rhythm , Hypertension , Humans , Male , Middle Aged , Angiotensin Receptor Antagonists/therapeutic use , Angiotensin Receptor Antagonists/pharmacology , Antihypertensive Agents/therapeutic use , Antihypertensive Agents/pharmacology , Blood Pressure/drug effects , Blood Pressure Monitoring, Ambulatory , Circadian Rhythm/drug effects , Hypertension/drug therapy , Imidazoles , Tetrazoles , Treatment Outcome
13.
Zh Nevrol Psikhiatr Im S S Korsakova ; 124(4. Vyp. 2): 41-48, 2024.
Article Ru | MEDLINE | ID: mdl-38696150

Arterial hypertension (AH) is a leading risk factor for cardiovascular diseases including cerebrovascular complications. Strokes and/or vascular cognitive impairment (VCI) are considered as a clinical sign of brain damage as a target organ in hypertension. To identify and assess the severity of VCI, patients with hypertension should undergo a neuropsychological assessment. Neuroimaging confirm the vascular origin of cognitive impairment. Patient management should include antihypertensive therapy along with neuroprotection. Among different neuroprotective therapy, ethylmethylhydroxypyridine succinate (mexidol) is one of medication with serious evidence of clinical efficacy.


Cognitive Dysfunction , Hypertension , Picolines , Humans , Hypertension/complications , Hypertension/drug therapy , Cognitive Dysfunction/etiology , Cognitive Dysfunction/diagnosis , Picolines/therapeutic use , Antihypertensive Agents/therapeutic use , Neuroprotective Agents/therapeutic use , Neuropsychological Tests
16.
FASEB J ; 38(9): e23654, 2024 May 15.
Article En | MEDLINE | ID: mdl-38717442

Heart failure and cardiac remodeling are both characterized by mitochondrial dysfunction. Healthy mitochondria are required for adequate contractile activity and appropriate regulation of cell survival. In the mammalian heart, enhancement of the mitochondrial unfolded protein response (UPRmt) is cardioprotective under pressure overload conditions. We explored the UPRmt and the underlying regulatory mechanism in terms of hypertension-induced cardiac remodeling and the cardioprotective effect of metformin. Male spontaneously hypertensive rats and angiotensin II-treated neonatal rat cardiomyocytes were used to induce cardiac hypertrophy. The results showed that hypertension induced the formation of aberrant mitochondria, characterized by a reduced mtDNA/nDNA ratio and swelling, as well as lower levels of mitochondrial complexes I to V and inhibition of the expression of one protein subunit of each of complexes I to IV. Such changes eventually enlarged cardiomyocytes and increased cardiac fibrosis. Metformin treatment increased the mtDNA/nDNA ratio and regulated the UPRmt, as indicated by increased expression of activating transcription factor 5, Lon protease 1, and heat shock protein 60, and decreased expression of C/EBP homologous protein. Thus, metformin improved mitochondrial ultrastructure and function in spontaneously hypertensive rats. In vitro analyses revealed that metformin reduced the high levels of angiotensin II-induced mitochondrial reactive oxygen species in such animals and stimulated nuclear translocation of heat shock factor 1 (HSF1). Moreover, HSF1 small-interfering RNA reduced the metformin-mediated improvements in mitochondrial morphology and the UPRmt by suppressing hypertrophic signals and cardiomyocyte apoptosis. These results suggest that HSF1/UPRmt signaling contributes to the beneficial effects of metformin. Metformin-mediated targeting of mitochondrial protein homeostasis and modulation of HSF1 levels have potential therapeutic implications in terms of cardiac remodeling.


Heat Shock Transcription Factors , Metformin , Myocytes, Cardiac , Unfolded Protein Response , Animals , Male , Rats , Angiotensin II/pharmacology , Cardiomegaly/metabolism , Cardiomegaly/drug therapy , Cardiomegaly/pathology , DNA-Binding Proteins/metabolism , DNA-Binding Proteins/genetics , Heat Shock Transcription Factors/drug effects , Heat Shock Transcription Factors/metabolism , Hypertension/metabolism , Hypertension/drug therapy , Metformin/pharmacology , Mitochondria, Heart/metabolism , Mitochondria, Heart/drug effects , Myocytes, Cardiac/metabolism , Myocytes, Cardiac/drug effects , Rats, Inbred SHR , Rats, Inbred WKY , Transcription Factors/metabolism , Transcription Factors/genetics , Unfolded Protein Response/drug effects , Ventricular Remodeling/drug effects
18.
Yonsei Med J ; 65(6): 324-331, 2024 Jun.
Article En | MEDLINE | ID: mdl-38804026

PURPOSE: The microenvironment of pancreatic ductal adenocarcinoma (PDAC) with extensive desmoplastic stroma contributes to aggressive cancer behavior. Angiotensin system inhibitors (ASIs) reduce stromal fibrosis and are a promising therapeutic strategy. The purpose of this study was to examine how ASIs affected the oncological results of patients who had their PDAC removed. MATERIALS AND METHODS: A retrospective assessment was conducted on the clinicopathological and survival data of patients who received curative resection for PDAC at Severance Hospital between January 2012 and December 2019. RESULTS: A total of 410 participants (228 male and 182 female), with a median follow-up period of 12.8 months, were included in this study. Patients were divided into three groups, based on ASI use and history of hypertension: group 1, normotensive and never used ASI (n=210, 51.2%); group 2, ASI non-users with hypertension (n=50, 12.2%); and group 3, ASI users with hypertension (n=150, 36.6%). The three groups did not differ significantly in terms of age, sex, kind of operation, T and N stages, or adjuvant and neoadjuvant therapy. Moreover, there was no discernible difference in disease-free survival between those who used ASI and those who did not (p=0.636). The 5-year overall survival (OS) rates in groups 1, 2, and 3 were 52.6%, 32.3%, and 38.0%, respectively. However, the OS rate of ASI users was remarkably higher than that of non-users (p=0.016). CONCLUSION: In patients with resected PDAC, ASI is linked to longer survival rates. Furthermore, for individuals with hypertension, ASI in conjunction with conventional chemotherapy may be an easy and successful treatment option.


Carcinoma, Pancreatic Ductal , Pancreatic Neoplasms , Humans , Male , Female , Pancreatic Neoplasms/surgery , Pancreatic Neoplasms/drug therapy , Pancreatic Neoplasms/mortality , Pancreatic Neoplasms/pathology , Middle Aged , Retrospective Studies , Aged , Carcinoma, Pancreatic Ductal/surgery , Carcinoma, Pancreatic Ductal/drug therapy , Carcinoma, Pancreatic Ductal/mortality , Carcinoma, Pancreatic Ductal/pathology , Hypertension/drug therapy , Angiotensin-Converting Enzyme Inhibitors/therapeutic use , Disease-Free Survival , Adult
20.
J Am Heart Assoc ; 13(10): e033998, 2024 May 21.
Article En | MEDLINE | ID: mdl-38726925

BACKGROUND: The vasoconstrictor effects of angiotensin II via type 1 angiotensin II receptors in vascular smooth muscle cells are well established, but the direct effects of angiotensin II on vascular endothelial cells (VECs) in vivo and the mechanisms how VECs may mitigate angiotensin II-mediated vasoconstriction are not fully understood. The present study aimed to explore the molecular mechanisms and pathophysiological relevance of the direct actions of angiotensin II on VECs in kidney and brain microvessels in vivo. METHODS AND RESULTS: Changes in VEC intracellular calcium ([Ca2+]i) and nitric oxide (NO) production were visualized by intravital multiphoton microscopy of cadherin 5-Salsa6f mice or the endothelial uptake of NO-sensitive dye 4-amino-5-methylamino-2',7'-difluorofluorescein diacetate, respectively. Kidney fibrosis by unilateral ureteral obstruction and Ready-to-use adeno-associated virus expressing Mouse Renin 1 gene (Ren1-AAV) hypertension were used as disease models. Acute systemic angiotensin II injections triggered >4-fold increases in VEC [Ca2+]i in brain and kidney resistance arterioles and capillaries that were blocked by pretreatment with the type 1 angiotensin II receptor inhibitor losartan, but not by the type 2 angiotensin II receptor inhibitor PD123319. VEC responded to acute angiotensin II by increased NO production as indicated by >1.5-fold increase in 4-amino-5-methylamino-2',7'-difluorofluorescein diacetate fluorescence intensity. In mice with kidney fibrosis or hypertension, the angiotensin II-induced VEC [Ca2+]i and NO responses were significantly reduced, which was associated with more robust vasoconstrictions, VEC shedding, and microthrombi formation. CONCLUSIONS: The present study directly visualized angiotensin II-induced increases in VEC [Ca2+]i and NO production that serve to counterbalance agonist-induced vasoconstriction and maintain residual organ blood flow. These direct and endothelium-specific angiotensin II effects were blunted in disease conditions and linked to endothelial dysfunction and the development of vascular pathologies.


Angiotensin II , Brain , Calcium , Hypertension , Kidney , Microvessels , Nitric Oxide , Vasoconstriction , Animals , Nitric Oxide/metabolism , Angiotensin II/pharmacology , Hypertension/metabolism , Hypertension/physiopathology , Hypertension/drug therapy , Kidney/blood supply , Kidney/metabolism , Calcium/metabolism , Vasoconstriction/drug effects , Microvessels/metabolism , Microvessels/drug effects , Microvessels/pathology , Brain/metabolism , Brain/blood supply , Mice , Disease Models, Animal , Male , Endothelial Cells/metabolism , Endothelial Cells/drug effects , Mice, Inbred C57BL , Calcium Signaling/drug effects
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