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JPGN Reports May 2024We report the case of a 14-year-old patient with a known history of Crohn's disease who was incidentally diagnosed with an asymptomatic cecal lipoma. A routine...
We report the case of a 14-year-old patient with a known history of Crohn's disease who was incidentally diagnosed with an asymptomatic cecal lipoma. A routine surveillance colonoscopy as part of the management of the patient's Crohn's Disease revealed a well-defined, submucosal, yellowish mass in the patient's cecum. Histopathological examination of a biopsy specimen revealed submucosal adipose tissue, consistent with the endoscopic images showing the characteristic appearance of the lipoma. A computed tomography examination further confirmed the diagnosis. While colonic lipomas are infrequent and typically manifest later in life, few cases report the coexistence of a cecal lipoma with Crohn's disease, particularly in the pediatric population. In this case, managing this dual condition posed a notable challenge. Here, we present the conservative approach to managing a pediatric patient with cecal lipoma and Crohn's disease. The decision to leave the lipoma in situ was based on the absence of symptoms and potential risks associated with surgical removal.
PubMed: 38756132
DOI: 10.1002/jpr3.12061 -
Physiological Research May 2024Warm-blooded animals such as birds and mammals are able to protect stable body temperature due to various thermogenic mechanisms. These processes can be facultative...
Warm-blooded animals such as birds and mammals are able to protect stable body temperature due to various thermogenic mechanisms. These processes can be facultative (occurring only under specific conditions, such as acute cold) and adaptive (adjusting their capacity according to long-term needs). They can represent a substantial part of overall energy expenditure and, therefore, affect energy balance. Classical mechanisms of facultative thermogenesis include shivering of skeletal muscles and (in mammals) non-shivering thermogenesis (NST) in brown adipose tissue (BAT), which depends on uncoupling protein 1 (UCP1). Existence of several alternative thermogenic mechanisms has been suggested. However, their relative contribution to overall heat production and the extent to which they are adaptive and facultative still needs to be better defined. Here we focus on comparison of NST in BAT with thermogenesis in skeletal muscles, including shivering and NST. We present indications that muscle NST may be adaptive but not facultative, unlike UCP1-dependent NST. Due to its slow regulation and low energy efficiency, reflecting in part the anatomical location, induction of muscle NST may counteract development of obesity more effectively than UCP1-dependent thermogenesis in BAT.
PubMed: 38752772
DOI: No ID Found -
JCEM Case Reports May 2024
PubMed: 38746052
DOI: 10.1210/jcemcr/luae082 -
Frontiers in Endocrinology 2024
Topics: Humans; Obesity; Animals
PubMed: 38737548
DOI: 10.3389/fendo.2024.1371113 -
Radiology Case Reports Aug 2024Three distinct types of adipose tissue have been characterized: brown, white, and beige. Brown adipose tissue (BAT) is typically found in specific regions including the...
Three distinct types of adipose tissue have been characterized: brown, white, and beige. Brown adipose tissue (BAT) is typically found in specific regions including the anterior cervical, supraclavicular, axillary, and paravertebral areas. White adipose tissue (WAT) predominantly resides in subcutaneous layers, intramuscular spaces and among visceral organs, while beige adipose tissue is a subtype of WAT and is found interspersed within WAT deposits. BAT displays metabolic activity detectable on PET/CT scans, in contrast to WAT, which typically exhibits minimal to no uptake. Beige adipose tissue has been observed metabolically active in mice under certain conditions. Alterations in adipose tissue biodistribution are uncommon and have been linked to high-dose corticosteroid use. We present a rare case illustrating abnormal FDG uptake in WAT associated with high-dose corticosteroid therapy.
PubMed: 38737187
DOI: 10.1016/j.radcr.2024.04.018 -
Food Chemistry: X Jun 2024Purpose of current study was to determine physicochemical, triglyceride composition, and functional groups of wild adlay accessions (brown, black, yellow, grey, green,...
Purpose of current study was to determine physicochemical, triglyceride composition, and functional groups of wild adlay accessions (brown, black, yellow, grey, green, off white, and purple) to find out its scope as cereal crop. Triglycerides, minerals and functional groups were determined through Gas chromatography, spectrophotometer and Fourier Transform Infrared (FTIR) spectrophotometer respectively. Results revealed variation among bulk densities, specific densities, percent empty spaces, and corresponding grain counts per 10 g of sample are useful in distinguishing brown, black, yellow, grey, green, off white, and purple wild adlay accessions. Specific density and grain count per 10 g sample was significantly related. No statistical relationship exists among the pronounced physical characteristics. Brown adlay expressed the highest protein, fat, and fiber contents 15.82%, 4.76% and 2.37% respectively. Protein, fat, ash, and fiber percent contents were found comparable to cultivated adlay. Spectrophotometric analysis revealed macro elements including phosphorus, potassium, calcium, and sodium in the range 0.3% - 2.2% and micro elements boron, iron, copper, zinc, and manganese in the range 1.6 mg/kg - 20.8 mg/kg. Gas chromatography showed polyunsaturated fatty acids (PUFA) constitute the primary fraction (39% ± 7.2) of wild adlay triglycerides. Linoleic and palmitic acids were present as prominent fatty acids, 43.5% ±1.4 and 26.3% ±1.4 respectively. Infra-red frequencies distinguished functional groups in narrow band and fingerprint region of protein in association with out of plane region leading to structural differences among adlay accessions. Comparison of major distinguishing vibrational frequencies among different flours indicated black adlay containing highest functional groups appeared promising for varietal development.
PubMed: 38736980
DOI: 10.1016/j.fochx.2024.101418 -
Journal of Diabetes Research 2024Adipose tissue dysfunction is seen among obese and type 2 diabetic individuals. Adipocyte proliferation and hypertrophy are the root causes of adipose tissue expansion....
Adipose tissue dysfunction is seen among obese and type 2 diabetic individuals. Adipocyte proliferation and hypertrophy are the root causes of adipose tissue expansion. Solute carrier family 25 member 28 (SLC25A28) is an iron transporter in the inner mitochondrial membrane. This study is aimed at validating the involvement of SLC25A28 in adipose accumulation by tail vein injection of adenovirus (Ad)-SLC25A28 and Ad-green fluorescent protein viral particles into C57BL/6J mice. After 16 weeks, the body weight of the mice was measured. Subsequently, morphological analysis was performed to establish a high-fat diet (HFD)-induced model. SLC25A28 overexpression accelerated lipid accumulation in white and brown adipose tissue (BAT), enhanced body weight, reduced serum triglyceride (TG), and impaired serum glucose tolerance. The protein expression level of lipogenesis, lipolysis, and serum adipose secretion hormone was evaluated by western blotting. The results showed that adipose TG lipase (ATGL) protein expression was reduced significantly in white and BAT after overexpression SLC25A28 compared to the control group. Moreover, SLC25A28 overexpression inhibited the BAT formation by downregulating UCP-1 and the mitochondrial biosynthesis marker PGC-1. Serum adiponectin protein expression was unregulated, which was consistent with the expression in inguinal white adipose tissue (iWAT). Remarkably, serum fibroblast growth factor (FGF21) protein expression was negatively related to the expansion of adipose tissue after administrated by Ad-SLC25A28. Data from the current study indicate that SLC25A28 overexpression promotes diet-induced obesity and accelerates lipid accumulation by regulating hormone secretion and inhibiting lipolysis in adipose tissue.
Topics: Animals; Adipogenesis; Mice, Inbred C57BL; Mice; Diet, High-Fat; Male; Adipose Tissue, Brown; Adipose Tissue, White; Lipase; Obesity; Lipolysis; Uncoupling Protein 1; Fibroblast Growth Factors; Cation Transport Proteins; Adipocytes; Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha; Lipogenesis; Acyltransferases
PubMed: 38736904
DOI: 10.1155/2024/5511454 -
Journal of Cutaneous and Aesthetic... 2024Xanthelasma palpebrarum (XP) is a benign cosmetic condition. Although the role of CO laser is well described, there are only a few studies on Erbium: YAG in XP....
A Clinical and Dermatoscopic Perspective of the Efficacy and Safety of Erbium: YAG Laser Ablation Versus 50% Trichloroacetic Acid for the Management of Xanthelasma Palpebrarum.
UNLABELLED
Xanthelasma palpebrarum (XP) is a benign cosmetic condition. Although the role of CO laser is well described, there are only a few studies on Erbium: YAG in XP. Similarly, trichloroacetic acid (TCA) is commonly used in XP. However, there are only a few studies comparing these modalities in the treatment of XP.
AIM
To evaluate the effectiveness and safety of Erbium: YAG laser and 50% TCA in the treatment of XP with the role of dermoscope in the evaluation of lesions.
MATERIALS AND METHODS
A total of 20 subjects were randomly allocated into two groups: group A (TCA) and group B (laser). All patients were subcategorized into three grades viz. I (mild), II (moderate), and III (severe) using a self-devised scoring system.
RESULTS
About 25% and 70% of patients achieved complete clearance in groups A and B, respectively ( = 0.017). The rate of recurrence was 40% and 15% in groups A and B. Dyspigmentation and erythema were the most common side effects. Pretreatment dermoscopic evaluation of the lesion showed a network of brown streaks on a background of a yellowish structureless area and was used to assess the area and margins of the lesion where the adipose tissue was found during the procedure and serial assessment of the lesion.
PubMed: 38736854
DOI: 10.4103/JCAS.JCAS_157_22 -
Molecular Metabolism May 2024Sulfonylureas (SUs) are still among the mostly prescribed antidiabetic drugs with an established mode of action: release of insulin from pancreatic β-cells. In...
OBJECTIVE
Sulfonylureas (SUs) are still among the mostly prescribed antidiabetic drugs with an established mode of action: release of insulin from pancreatic β-cells. In addition, effects of SUs on adipocytes by activation of the nuclear receptor peroxisome proliferator-activated receptor γ (PPARγ) have been described, which might explain their insulin-sensitizing potential observed in patients. However, there is a discrepancy between the impact of SUs on antidiabetic action and their rather moderate in vitro effect on PPARγ transcriptional activity. Recent studies have shown that some PPARγ ligands can improve insulin sensitivity by blocking PPARγ Ser-273 phosphorylation without having full agonist activity. It is unknown if SUs elicit their antidiabetic effects on adipocytes by inhibition of PPARγ phosphorylation. Here, we investigated if binding of SUs to PPARγ can interfere with PPARγ Ser-273 phosphorylation and determined their antidiabetic actions in vitro in primary human white adipocytes and in vivo in high-fat diet (HFD) obese mice.
METHODS
Primary human white preadipocytes were differentiated in the presence of glibenclamide, glimepiride and PPARγ ligands rosiglitazone and SR1664 to compare PPARγ Ser-273 phosphorylation, glucose uptake and adipokine expression. Transcriptional activity at PPARγ was determined by luciferase assays, quantification of PPARγ Ser-273 phosphorylation was determined by Western blotting and CDK5 kinase assays. In silico modelling was performed to gain insight into the binding characteristics of SUs to PPARγ. HFD mice were administered SUs and rosiglitazone for 6 days. PPARγ Ser-273 phosphorylation in white adipose tissue (WAT), body composition, glucose tolerance, adipocyte morphology and expression levels of genes involved in PPARγ activity in WAT and brown adipose tissue (BAT) were evaluated.
RESULTS
SUs inhibit phosphorylation of PPARγ at Ser-273 in primary human white adipocytes and exhibit a positive antidiabetic expression profile, which is characterized by up regulation of insulin-sensitizing and down regulation of insulin resistance-inducing adipokines. We demonstrate that SUs directly bind to PPARγ by in silico modelling and inhibit phosphorylation in kinase assays to a similar extend as rosiglitazone and SR1664. In HFD mice SUs reduce PPARγ phosphorylation in WAT and have comparable effects on gene expression to rosiglitazone. In BAT SUs increase UCP1 expression and reduce lipid droplets sizes.
CONCLUSIONS
Our findings indicate that a part of SUs extra-pancreatic effects on adipocytes in vitro and in vivo is probably mediated via their interference with PPARγ phosphorylation rather than via classical agonistic activity at clinical concentrations.
PubMed: 38735390
DOI: 10.1016/j.molmet.2024.101956 -
Biochimica Et Biophysica Acta.... May 2024Olanzapine (OLA) is a highly obesogenic second-generation antipsychotic (SGA). Recently we demonstrated that, contrarily to OLA oral treatment, intraperitoneal (i.p.)...
Olanzapine (OLA) is a highly obesogenic second-generation antipsychotic (SGA). Recently we demonstrated that, contrarily to OLA oral treatment, intraperitoneal (i.p.) administration resulted in weight loss and absence of hepatic steatosis in wild-type (WT) and protein tyrosine phosphatase 1B (PTP1B)-deficient (KO) male mice. This protection relied on two central-peripheral axes connecting hypothalamic AMPK with brown/inguinal white adipose tissue (BAT/iWAT) uncoupling protein-1 (UCP-1) and hypothalamic JNK with hepatic fatty acid synthase (FAS). Herein, we addressed OLA i.p. treatment effects in WT and PTP1B-KO female mice. Contrarily to our previous results in WT females receiving OLA orally, the i.p. treatment did not induce weight gain or hyperphagia. Molecularly, in females OLA failed to diminish hypothalamic phospho-AMPK or elevate BAT UCP-1 and energy expenditure (EE) despite the preservation of iWAT browning. Conversely, OLA i.p. treatment in ovariectomized mice reduced hypothalamic phospho-AMPK, increased BAT/iWAT UCP-1 and EE, and induced weight loss as occurred in males. Pretreatment of hypothalamic neurons with 17β-estradiol (E) abolished OLA effects on AMPK. Moreover, neither hypothalamic JNK activation nor hepatic FAS upregulation were found in WT and PTP1B-KO females receiving OLA via i.p. Importantly, this axis was reestablished upon ovariectomy. In this line, E prevented OLA-induced phospho-JNK in hypothalamic neurons. These results support the role of estrogens in sex-related dimorphism in OLA treatment. This study evidenced the benefit of OLA i.p. administration in preventing its obesogenic effects in female mice that could offer clinical value.
PubMed: 38733774
DOI: 10.1016/j.bbadis.2024.167227