Publications by authors named "Milica Vranic"

Objective: The objective was to study metabolic characteristics and transcriptome of renal sinus adipose tissue (RSAT) located around renal arteries and veins.

Methods: Adipose tissue biopsies from RSAT, omental (OAT), and subcutaneous (SAT) depots were obtained from healthy kidney donors (20 female, 20 male). Adipocyte glucose uptake rate and cell size were measured, and gene expression analyses using transcriptomics were performed.

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Article Synopsis
  • Catecholamine-stimulated lipolysis decreases with age, leading to increased fat accumulation and insulin resistance, linked to the function of OCT3, a transporter inhibited by estradiol (E2).
  • The study involved analyzing subcutaneous adipose tissue (SAT) from women of varying ages and diabetes statuses to measure OCT3 mRNA levels and their correlation to insulin resistance.
  • Results showed that OCT3 mRNA and protein levels rise with age and postmenopause, but decrease with E2 treatment, suggesting that higher OCT3 levels may impair lipolysis and contribute to insulin resistance in older women.
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Purpose: To evaluate the dopaminergic signaling in human adipose tissue in the context of obesity and type 2 diabetes (T2D) and potential direct implications in adipose tissue metabolism.

Methods: mRNA and protein expression of dopamine receptors D1 and D2 (DRD1 and DRD2) were determined in subcutaneous adipose tissue from subjects without or with T2D and with different body weight, and correlated with markers of obesity, hyperglycemia, and insulin resistance. Glucose uptake and lipolysis were measured in adipocytes ex vivo following short-term exposure to dopamine, DRD1 receptor agonist (SKF81297), or DRD2 receptor agonist (bromocriptine).

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Cdk5 and Abl enzyme substrate 1 (CABLES1) is a cell cycle regulator that has previously been identified as a candidate gene for obesity-related phenotypes, but little is known about its role in adipose tissue metabolism. In this study, we explore the role of CABLES1 in obesity and type 2 diabetes (T2D) in human subcutaneous adipose tissue (SAT). We performed gene expression analysis of SAT obtained from subjects with and without T2D, and from a second validation cohort consisting of subjects without T2D.

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Second-generation antipsychotics (SGAs), used as the cornerstone treatment for schizophrenia and other mental disorders, can cause adverse metabolic effects (e.g. obesity and type 2 diabetes).

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Oestrogen receptor 2 () expression has been shown to be higher in subcutaneous adipose tissue (SAT) from postmenopausal compared to premenopausal women. The functional significance of altered expression is not fully known. This study investigates the role of for adipose tissue lipid and glucose metabolism.

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Context: Reduced estrogen levels in postmenopausal women predispose them to metabolic side effects, including insulin resistance and type 2 diabetes; however, the cellular mechanisms are not well understood.

Objective: This work aimed to study the expression of estrogen receptors in adipose tissue from pre- and postmenopausal women and the effects of estradiol (E2) on glucose uptake of adipocytes.

Methods: Subcutaneous (SAT) and visceral adipose tissue (VAT) obtained from pre- and postmenopausal women (19-51 and 46-75 years old, respectively) were used to measure gene expression of ESR1 and ESR2.

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CDKN2C/p18 (Cyclin-Dependent Kinase Inhibitor 2C) is a cell growth regulator that controls cell cycle progression and has previously been associated with increased risk for type II diabetes (T2D) and reduced peripheral adipose tissue (AT) storage capacity. This study explored the role of CDKN2C in AT lipid and glucose metabolism in T2D. Expression of CDKN2C and other genes was analyzed by transcriptomics, or real-time PCR in subcutaneous AT (SAT) samples obtained from T2D and control subjects matched for sex, age and BMI and also in paired SAT and omental AT (OAT) samples.

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Article Synopsis
  • CRISPR/Cas9 has changed the game in genome editing, but its successful use in human fat tissue has yet to be convincingly demonstrated.
  • The authors developed a new method for gene knockout in human preadipocytes (fat cells) using electroporation, achieving over 90% efficiency without needing to select edited cells.
  • They specifically knocked out the PPARG gene to prevent fat cell formation and the FKBP5 gene, which impacted glucose metabolism, highlighting potential links to insulin resistance and type 2 diabetes while offering a straightforward way to study human fat cells instead of relying on animal models.
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