Publications by authors named "Cleide G Machado"

To describe the successful closure of an idiopathic macular hole (MH) with topical therapy after surgery failed. A case report was evaluated and prospective literature review performed. After surgery to correct an MH in a 57-year-old female patient failed, topical therapy was initiated.

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  • The study investigates how genetic variations (SNPs) in the melatonin receptor gene might influence the development of microvascular complications in individuals with type 1 diabetes (T1D).
  • It involves examining eight specific SNPs in a cohort of 489 T1D patients, looking at both current complications and long-term kidney function over an average of eight years.
  • Results indicate that individuals with a significant decline in kidney function have a higher frequency of a specific genetic variant (A allele of rs4862705), suggesting a potential link between melatonin genetics and renal health in diabetes.
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Background: To describe the anatomical and functional outcomes and late complications in patients who developed inferior proliferative vitreoretinopathy (PVR) in silicone oil-filled eyes and who required reoperation with large inferior retinectomy.

Methods: This is a single-center, retrospective, interventional case series analysis. The study involved 18 individuals with tractional retinal re-detachment due to PVR development inferiorly in eyes who had undergone prior pars plana vitrectomy and silicone oil as a tamponade.

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Purpose: To describe a rare case of a 13 years-old healthy child that presented CRAO secondary to carotid artery dissection, which occurred after a neck rotation movement.

Methods: Case report with prospective literature review.

Patients: One patient described in the case report.

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Purpose: To describe and value a peculiar alteration typically found in rhegmatogenous retinal detachment raising news foundations of its role in the photoreceptors and visual prognosis.

Design: Case description and rationale formulation.

Subjects: An isolated case.

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Background: The tomographic finding, which has been called the "fingerprint sign" in en face reconstructions, seems to be the result of a variety of processes that cause distension of the outer plexiform layer (OPL) and the Henle fiber layer (HFL). The aim of this paper is to describe the appearance of concentric rings at the OPL/HFL interface visualized using en face reconstructions of cross-sectional optical coherence tomography images of patients with Vogt-Koyanagi-Harada disease.

Methods: Retrospective analysis of images of six eyes of three patients obtained by cross-sectional OCT imaging and en face reconstruction at the level of the OPL/HFL interface.

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Background And Objective: To compare pain intensity with single-spot versus multispot technique in laser panretinal photocoagulation, using a 532-nm, solid-state laser system.

Materials And Methods: This was a prospective, interventional, randomized, single-masked comparison trial. Patients received two types of intervention: conventional single-spot technique, with an exposure time of 150 ms, and multispot technique, done with an exposure time of 20 ms, Both techniques used power sufficient to produce visible gray-white burns, and spot size of 20 μm.

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Purpose: The aim of this article is to do a comprehensive literature review about the current understandings of the pachychoroid disease spectrum, describing its multimodal imaging analysis, pathophysiology, differential diagnosis, and current types of management.

Methods: This comprehensive literature review was performed based on a search on the PubMed database, of relevant pachychoroid published papers according to our current knowledge.

Discussion: The pachychoroid disease spectrum, according to some authors, includes the following: pachychoroid pigment epitheliopathy (PPE), central serous chorioretinopathy (CSC), pachychoroid neovasculopathy (PNV), polypoidal choroidal vasculopathy (PCV)/aneurysmal type 1 neovascularization (AT1), and more recently focal choroidal excavation (FCE) and peripapillary pachychoroid syndrome (PPS).

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  • The study aimed to compare contrast sensitivity outcomes in patients with proliferative diabetic retinopathy treated with both panretinal photocoagulation and ranibizumab versus those treated with panretinal photocoagulation alone.
  • A total of 60 eyes from 30 patients were analyzed, with contrast sensitivity tested at various spatial frequencies over 6 months.
  • Results indicated that the combination treatment (photocoagulation + ranibizumab) significantly improved contrast sensitivity, particularly at low spatial frequencies, suggesting ranibizumab may be beneficial alongside traditional treatment.
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Background And Aim: 11β-Hydroxysteroid dehydrogenase 1 has been implicated in insulin resistance (IR) in the setting of metabolic disorders, and single nucleotide polymorphisms (SNPs) in its encoding gene (HSD11B1) have been associated with type 2 diabetes and metabolic syndrome. In type 1 diabetes (T1D), IR has been related to the development of chronic complications. We investigated the association of HSD11B1 SNPs with microvascular complications and with IR in a Brazilian cohort of T1D individuals.

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Background And Aims: Since hyperglycemia promotes inflammation by different pathways and inflammation participates in the development of chronic diabetes complications, we investigated the association between the leukotriene (LT) pathway and microvascular diabetes complications.

Methods And Results: Quantitative polymerase chain reaction was employed to quantify the expression of (encodes 5-lipoxygenase), (encodes one of the LTB4 receptors), and in peripheral blood mononuclear cells from 164 type 1 diabetes (T1D) individuals presenting or not diabetes kidney disease, retinopathy, peripheral neuropathy, and cardiovascular autonomic neuropathy (CAN); 26 nondiabetic subjects were included as controls. LTB4 plasmatic concentrations were also evaluated.

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To compare the serum micro-RNAs (miRNAs) profile of individuals with type 1 diabetes without microvascular complications vs. those with multiple severe microvascular complications, in order to identify epigenetically modulated pathways in these two groups of individuals. A total of 10 subjects were selected among individuals followed in the Diabetes Outpatient Clinic and sorted according to the absence or presence of all microvascular complications.

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  • The study investigates the link between oxidative stress and diabetic retinopathy (DR) in individuals with type 1 diabetes (T1D), focusing on specific genetic variations (SNPs) in antioxidant genes.
  • It involved 288 participants, categorized by DR stages, and utilized real-time PCR for genetic analysis along with logistic regression to account for other influencing factors.
  • Findings revealed that the T-allele of rs17883901 increases the risk of proliferative DR while the T-allele of rs713041 offers protection against it, highlighting the potential role of these SNPs in DR management.
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Management of pediatric pulmonary hypertension associated with congenital heart disease (PHT-CHD) is challenging. Some patients have persistently elevated pulmonary artery pressure (PAP) after cardiac surgery, an undesired condition that is difficult to predict. We investigated the value of clinical, hemodynamic, and histopathological data in predicting the outcome in a prospective cohort.

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  • The study explores how genetic variants in the DNMT1 gene may influence the risk of complications from diabetes, particularly focusing on metabolic memory caused by past hyperglycemia.
  • Researchers assessed five specific gene variants in a group of 359 individuals with long-term type 1 diabetes to identify any associations with complications like kidney disease and neuropathy.
  • While no significant associations were found in the entire group, one variant was linked to increased cardiovascular neuropathy risk in women, suggesting the potential genetic involvement in diabetes-related microvascular issues.
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Quantitative polymerase chain reaction was employed to quantify expression of two genes coding for advanced glycation end-product receptors [RAGE ( AGER) and AGER1 ( DDOST)] and of the gene coding the deacetylase SIRT1 ( SIRT1) in peripheral blood mononuclear cells from type 1 diabetes patients without [Group A, n = 35; 28.5 (24-39) years old; median (interquartile interval)] or with at least one microvascular complication [Group B, n = 117; 34.5 (30-42) years old]; 31 healthy controls were also included.

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Aims: Thioredoxin interacting protein (TXNIP), an inhibitor of antioxidant thioredoxin (Trx), is upregulated by hyperglycemia and implicated in pathogenesis of diabetes complications. We evaluated mRNA expressions of genes encoding TXNIP and Trx (TXN) in urinary sediment and peripheral blood mononuclear cells (PBMC) of type 1 diabetes (T1D) patients with different degrees of chronic complications.

Methods: qPCR was employed to quantify target genes in urinary sediment (n = 55) and PBMC (n = 161) from patients sorted by presence or absence of diabetic nephropathy (DN), retinopathy, peripheral and cardiovascular neuropathy; 26 healthy controls and 13 patients presenting non-diabetic nephropathy (focal and segmental glomerulosclerosis, FSGS) were also included.

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Purpose: To evaluate the results of intravitreal bevacizumab (IVB) injection on contrast sensitivity (CS), best-corrected visual acuity (BCVA), foveal thickness (FT) and macular volume (MV) as measured by optical coherence tomography in patients with macular edema (ME) from central retinal vein occlusion (CRVO).

Methods: Sixteen consecutive eyes from 16 patients with ME from unilateral CRVO were treated with a single IVB injection. The CS, BCVA, FT and MV measurements were obtained before the treatment and 1 and 3 months after the injection.

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  • The study aimed to assess the impact of a single injection of bevacizumab on vision and macular thickness in patients with macular edema caused by branch retinal vein occlusion.
  • Seventeen patients were evaluated before treatment and at one and three months post-injection, measuring visual acuity, contrast sensitivity, and central macular thickness.
  • Results showed short-term improvements in visual acuity and contrast sensitivity after one month, but vision levels declined again by three months; however, central macular thickness remained improved, indicating some lasting benefits.*
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