Blog Archive

Αλέξανδρος Γ. Σφακιανάκης

Sunday, July 17, 2022

Latent class analysis to characterize neonatal risk for neurodevelopmental differences

alexandrossfakianakis shared this article with you from Inoreader

Background

Neonatal risk factors, such as preterm birth and low birth weight, have been robustly linked to neurodevelopmental deficits, yet it is still unclear why some infants born preterm and/or low birth weight experience neurodevelopmental difficulties while others do not. The current study investigated this heterogeneity in neurodevelopmental abilities by examining additional neonatal morbidities as risk factors, utilizing latent class analysis to classify neonates into groups based on similar neonatal risk factors, and including neonates from the full spectrum of gestational age.

Methods

Neonates who received neonatal care at an academic public hospital during an almost 10-year period (n = 19,951) were included in the latent class analysis, and 21 neonatal indicators of health were used. Neonatal class, sex, and the interaction between neonatal class and sex were used to examine differences in neurodevelopment at 18 months of age in a typically developing population.

Results

The best fitting model included five infant classes: healthy, hypoxic, critically ill, minorly ill, and complicated delivery. Scores on the parent-rated neurodevelopmental measure differed by class such that infants in the critically ill, minorly ill, and complicated delivery classes had lower scores. There was no main effect of sex on the neurodevelopmental measure scores, but the interaction between sex and neonatal class was significant for three out of five neurodevelopmental domains.

Conclusions

The current study extends the understanding of risk factors in neurodevelopment by including several neonatal medical conditions that are often overlooked and by using a person-centered, as opposed to variable-centered, approach. Future work should continue to examine risk factors, such as maternal health during pregnancy and medical interventions for newborns, in relation to neonatal risks and neurodevelopment by using a person-centered approach.

View on Web

Ferulic Acid Mitigates Diabetic Cardiomyopathy via Modulation of Metabolic Abnormalities in Cardiac tissues of Diabetic Rats

alexandrossfakianakis shared this article with you from Inoreader

Abstract

Background

Cardiovascular abnormalities have been reported as a major contributor of diabetic mortality. The protective effect of ferulic acid on diabetic cardiomyopathy in fructose-streptozotocin induced type 2 diabetic (T2D) rat model was elucidated in this study.

Methods

T2D rats were treated by oral administration of low (150 mg/kg b.w) and high (300 mg/kg b.w) doses of ferulic acid. Metformin was used as the antidiabetic drug. Rats were humanely euthanized after 5 weeks of treatment and their blood and hearts were collected.

Results

Induction of T2D depleted the levels of reduced glutathione, glycogen, HDL-cholesterol and the activities of superoxide dismutase, catalase, ENTPDase and 5'Nucleotidase. It simultaneously triggered marked increase in levels of malondialdehyde, total cholesterol, triglyceride, LDL-cholesterol, creatinine kinase-MB as well as activities of acetylcholinesterase, ACE, ATPase, Glucose-6-phopsphatase, fructose-1,6-bisphophatase, glycogen phosphorylase and lipase. T2D induction further revealed obvious degeneration of cardiac muscle morphology. However, treatment with ferulic acid markedly reversed the levels and activities of these biomarkers with concomitant improvement in myocardium structural morphology, which had favourable comparison with the standard drug, metformin. Additionally, T2D induction led to depletion of 40, 75, and 33% of fatty acids, fatty esters, and steroids, respectively with concomitant generation of eicosenoic acid, gamolenic acid and vitamin E. Ferulic acid tre atment restored eicosanoic acid, 2-hydroxyethyl ester, with concomitant generation of 6-Octadecenoic acid, (Z)-, cis-11-Eicosenoic acid, tridecanedioic acid, octadecanoic acid, 2-hydroxyethyl ester, ethyl 3-hydroxytridecanoate, dipalmitin, cholesterol isocaproate, cholest-5-ene, 3-(1-oxobuthoxy)-, cholesta-3,5-diene.

Conclusion

These results suggest the cardioprotective potential of ferulic acid against diabetic cardiomyopathy.

View on Web

Empagliflozin has favourable effect on frontal plane QRS‐T angle in diabetic patients with cardiovascular disease

alexandrossfakianakis shared this article with you from Inoreader
Empagliflozin has favourable effect on frontal plane QRS-T angle in diabetic patients with cardiovascular disease

Empagliflozin treatment is associated with a significant decrease in the frontal plane QRS-T angle (fQRST) in patients with diabetes mellitus (DM). However, despite similar antihyperglycemic effect with empagliflozin treatment in patients with and without cardiovascular disease (CVD), the significant decrease in fQRST angle was observed only in patients with CVD and no significant decrease was observed in fQRST angle in patients without CVD. Therefore, as a sign of ventricular repolarization heterogeneity that can be easily measured from a standard 12-lead electrocardiography (ECG), fQRST angle may be a useful ECG parameter in the monitoring of cardiovascular effects of empagliflozin in type 2 DM patients with CVD.


Abstract

What is Known and Objective

Empagliflozin treatment is significantly associated with lower risk of cardiovascular events in patients with diabetes mellitus (DM) independent of its antihyperglycemic effect. However, little is known regarding the impact of empagliflozin on electrocardiography (ECG) parameters. This study aimed to investigate whether empagliflozin has favourable effect on frontal plane QRS-T (fQRST) angle, which is an ECG sign of ventricular repolarization heterogeneity, in patients with type 2 DM.

Methods

We prospectively enrolled 111 patients with known diagnosis of type 2 DM who newly prescribed empagliflozin on top of their standard anti-diabetic therapy. Patients were divided into two groups according to presence or absence of cardiovascular disease (CVD) at baseline and followed-up for 6 months. The impact of empagliflozin treatment on fQRST angle was investigated and patient groups were compared regarding the pre- and post-treatment fQRST angle.

Results and Discussion

Among 111 patients, 32 (28.8%) had CVD and 79 (71.2%) had no CVD. Empagliflozin treatment lead a significant decrease in the mean fQRST angle throughout the study period and mean fQRST angle was significantly lower at 3- and 6-month follow-up visits compared to baseline values (62° ± 17.4° vs. 57.2° ± 14.8° vs. 50.5° ± 13.6°, p < 0.001 for all dual comparisons). However, despite similar antihyperglycemic effect with empagliflozin treatment in patients with and without CVD, the significant decrease in the mean fQRST angle was observed only in patients with CVD and no significant decrease was observed in the mean fQRST angle in patients without CVD.

What is New and Conclusion

Empagliflozin leads a significant narrowing in the fQRST angle in type 2 DM patients with known CVD.

View on Web

High‐frequency pulsed diode laser irradiation inhibits bone resorption in mice with ligature‐induced periodontitis

alexandrossfakianakis shared this article with you from Inoreader

Abstract

Aim

The purpose of this study was to elucidate the suppressive effect of high-frequency pulsed diode laser irradiation on bone resorption and its biological effects for gene expression and microbiome composition on the gingival tissue in ligature-induced periodontitis in mice.

Materials and Methods

Ligating ligature around the teeth and/or laser irradiation was performed on the gingival tissue in mice as follows: Co (no ligature and no laser irradiation), Li (ligation without laser irradiation), La (no ligature but with laser irradiation), and LiLa (ligation with laser irradiation). Bone resorption was evaluated using micro-computed tomography. RNA-seq analysis was performed on gingival tissues of all four groups at 3 days post ligation. The differences in microbial composition between Li and LiLa were evaluated based on the number of 16S rRNA gene sequences.

Results

Bone resorption caused by ligation was significantly suppressed by laser irradiation. RNA-seq in Co and La gingival tissue revealed many differentially expressed genes, suggesting diode laser irradiation altered gene expression. Gene set enrichment analysis revealed mTORC1 signaling and E2F target gene sets were enriched in gingival tissues both in La and LiLa compared to that in Co and Li, respectively. The amount of extracted DNA from ligatures was reduced by laser irradiation, and bacterial network structure was altered between the Li and LiLa.

Conclusions

High-frequency pulsed diode laser irradiation showed biological effects and suppressed bone resorption in ligature-induced periodontitis.

This article is protected by copyright. All rights reserved.

View on Web

Toll‐like receptor‐1, ‐2, and ‐6 genotypes in relation to salivary human beta‐defensin‐1, ‐2, ‐3 and human neutrophilic peptide‐1

alexandrossfakianakis shared this article with you from Inoreader

Abstract

Aim

To examine whether functional gene polymorphisms of toll-like receptor (TLR)1, TLR2, and TLR6 are related to the salivary concentrations of human beta-defensins (hBDs)-1, -2, -3, and human neutrophilic peptide (HNP)-1.

Materials and methods

Polymorphisms of TLR1 (rs5743618), TLR2 (rs5743708), and TLR6 (rs5743810) were genotyped by PCR-based pyrosequencing from the salivary samples of 230 adults. Salivary hBD-1, -2, -3, and HNP-1 concentrations were measured using ELISA. General and periodontal health examination, including panoramic radiography, were available for all participants.

Results

The genotype frequencies for wild types and variant types were as follows: 66.5% and 33.5% for TLR1, 95.5% and 4.5% for TLR2, and 25.1% and 74.9% for TLR6, respectively. The TLR2 heterozygote variant group exhibited higher salivary hBD-2 concentrations than the TLR2 wild type group (p=0.038). On the contrary, elevated hBD-2 concentrations were detected in the TLR6 wild type group compared to the TLR6 heterozygote & homozygote variant group (p=0.028). The associations between TLR6 genotypes and salivary hBD-2 concentrations remained significant after adjusting them for periodontal status, age, and smoking.

Conclusion

hBD-2 concentrations in saliva are related to TLR2 and TLR6 polymorphisms, but only the TLR6 genotype seems to exhibit an independent association with the salivary hBD-2 concentrations.

This article is protected by copyright. All rights reserved.

View on Web

Anterior implant restorations with a convex emergence profile increase the frequency of recession: 12‐month results of a randomized controlled clinical trial

alexandrossfakianakis shared this article with you from Inoreader

Abstract

Objectives

To test whether or not the emergence profile (CONVEX or CONCAVE) of implant-supported crowns influences the mucosal margin stability up to 12 months post insertion of the final restoration.

Materials and methods

Forty-seven patients with a single implant in the anterior region were randomly allocated to one of three groups:1) CONVEX (n=15), implant provisional and an implant-supported crown both with a convex profile; 2) CONCAVE (n=16), implant provisional and an implant-supported crown both with a concave profile; 3) CONTROL (n=16), no provisional (healing abutment only) and an implant-supported crown. All patients were recalled at baseline, 6 and 12 months. The stability of mucosal margin along with clinical, aesthetic, profilometric outcomes as well as time and costs were evaluated. To predict the presence of recession multivariable logistic regressions were performed and linear models using generalized estimation equations (GEE) were conducted for the different outcomes.

Results

Forty-four patients were available at 12 months post-loading. The frequency of mucosal recession amounted to 64.3% in group CONVEX, 14.3% in group CONCAVE and 31.4% in group CONTROL. Regression models revealed that a CONVEX profile was significantly associated with the presence of recessions (OR:12.6, CI:95%: 1.82-88.48, p=0.01) compared to the CONCAVE profile. Pink aesthetic scores amounted to 5.9 in group CONVEX, 6.2 in group CONCAVE and 5.4 in group CONTROL, with no significant differences between the groups (p=0.756). Groups CONVEX and CONCAVE increased the appointments and costs compared to the CONTROL group.

Conclusion

The use of implant-supported provisionals with a CONCAVE emergence profile results in a greater stability of the mucosal margin compared to a CONVEX profile up to 12 months of loading. This is accompanied, however, by increased time and costs compared to the absence of a provisional and may not necessarily enhance the aesthetic outcomes.

This article is protected by copyright. All rights reserved.

View on Web

Critical roles for CCR2 and the therapeutic potential of cenicriviroc in periodontitis: a pre‐clinical study

alexandrossfakianakis shared this article with you from Inoreader

Abstract

Aim

CCR2 plays important roles in many inflammatory and bone metabolic diseases, but its specific role in periodontitis is unknown. In the present study, we aimed to explore the role of CCR2 in the progression of periodontitis and evaluate the effect of cenicriviroc (CVC) on periodontitis.

Methods

The expression of CCR2 was studied in patients with periodontitis and in ligation-induced murine model of periodontitis. The role of CCR2 in promoting inflammation and bone resorption in periodontitis was evaluated in Ccr2 −/− mice and wild-type mice. The effect of CVC in the prevention and treatment of periodontitis was evaluated by systemic and local medication. Micro-CT, Hematoxylin and eosin staining, tartrate-resistant acid phosphatase staining, real-time qPCR, ELISA, and flow cytometric were used for histomorphology, molecular biology and cytology analysis respectively.

Results

In this study, we demonstrated that CCR2 was highly expressed in human and murine periodontitis and that CCR2 deficiency was associated with decreased inflammation, alveolar bone resorption, osteoclast number, monocyte and macrophage infiltration. Prevention and treatment with CVC significantly reduced the severity of periodontitis, regardless of whether it was administered systemically or locally.

Conclusion

CCR2 plays an important role in the development and progression of periodontitis and CVC is a potential drug for the prevention and treatment of periodontitis.

View on Web