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Search Results (456)

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22 pages, 1641 KiB  
Article
Site-Specific Trafficking of Lipid and Polar Metabolites in Adipose and Muscle Tissue Reveals the Impact of Bariatric Surgery-Induced Weight Loss: A 6-Month Follow-Up Study
by Aidan Joblin-Mills, Zhanxuan E. Wu, Garth J. S. Cooper, Ivana R. Sequeira-Bisson, Jennifer L. Miles-Chan, Anne-Thea McGill, Sally D. Poppitt and Karl Fraser
Metabolites 2025, 15(8), 525; https://doi.org/10.3390/metabo15080525 - 2 Aug 2025
Viewed by 205
Abstract
Background: The causation of type 2 diabetes remains under debate, but evidence supports both abdominal lipid and ectopic lipid overspill into tissues including muscle as key. How these depots differentially alter cardiometabolic profile and change during body weight and fat loss is not [...] Read more.
Background: The causation of type 2 diabetes remains under debate, but evidence supports both abdominal lipid and ectopic lipid overspill into tissues including muscle as key. How these depots differentially alter cardiometabolic profile and change during body weight and fat loss is not known. Methods: Women with obesity scheduled to undergo bariatric surgery were assessed at baseline (BL, n = 28) and at 6-month follow-up (6m_FU, n = 26) after weight loss. Fasting plasma (Pla), subcutaneous thigh adipose (STA), subcutaneous abdominal adipose, (SAA), and thigh vastus lateralis muscle (VLM) samples were collected at BL through surgery and at 6m_FU using needle biopsy. An untargeted liquid chromatography mass spectrometry metabolomics platform was used. Pla and tissue-specific lipid and polar metabolite profiles were modelled as changes from BL and 6m_FU. Results: There was significant body weight (−24.5 kg) loss at 6m_FU (p < 0.05). BL vs. 6m_FU tissue metabolomics profiles showed the largest difference in lipid profiles in SAA tissue in response to surgery. Conversely, polar metabolites were more susceptible to change in STA and VLM. In Pla samples, both lipid and polar metabolite profiles showed significant differences between timepoints. Jaccard–Tanimoto coefficient t-tests identified a sub-group of gut microbiome and dietary-derived omega-3-fatty-acid-containing lipid species and core energy metabolism and adipose catabolism-associated polar metabolites that are trafficked between sample types in response to bariatric surgery. Conclusions: In this first report on channelling of lipids and polar metabolites to alternative tissues in bariatric-induced weight loss, adaptive shuttling of small molecules was identified, further promoting adipose processing and highlighting the dynamic and coordinated nature of post-surgical metabolic regulation. Full article
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15 pages, 2220 KiB  
Article
Radiologic Assessment of Periprostatic Fat as an Indicator of Prostate Cancer Risk on Multiparametric MRI
by Roxana Iacob, Emil Radu Iacob, Emil Robert Stoicescu, Diana Manolescu, Laura Andreea Ghenciu, Radu Căprariu, Amalia Constantinescu, Iulia Ciobanu, Răzvan Bardan and Alin Cumpănaș
Bioengineering 2025, 12(8), 831; https://doi.org/10.3390/bioengineering12080831 (registering DOI) - 31 Jul 2025
Viewed by 211
Abstract
Prostate cancer remains one of the most prevalent malignancies among men, and emerging evidence proposed a potential role for periprostatic adipose tissue (PPAT) in tumor progression. However, its relationship with imaging-based risk stratification systems such as PI-RADS remains uncertain. This retrospective observational study [...] Read more.
Prostate cancer remains one of the most prevalent malignancies among men, and emerging evidence proposed a potential role for periprostatic adipose tissue (PPAT) in tumor progression. However, its relationship with imaging-based risk stratification systems such as PI-RADS remains uncertain. This retrospective observational study aimed to evaluate whether periprostatic and subcutaneous fat thickness are associated with PI-RADS scores or PSA levels in biopsy-naïve patients. We retrospectively reviewed 104 prostate MRI scans performed between January 2020 and January 2024. Fat thickness was measured on axial T2-weighted images, and statistical analyses were conducted using Spearman’s correlation and multiple linear regression. In addition to linear measurements, we also assessed periprostatic fat volume and posterior fat thickness derived from imaging data. No significant correlations were observed between fat thickness (either periprostatic or subcutaneous) and PI-RADS score or PSA values. Similarly, periprostatic fat volume showed only a weak, non-significant correlation with PI-RADS, while posterior fat thickness demonstrated a weak but statistically significant positive association. Additionally, subgroup comparisons between low-risk (PI-RADS < 4) and high-risk (PI-RADS ≥ 4) patients showed no meaningful differences in fat measurements. These findings suggest that simple linear fat thickness measurements may not enhance imaging-based risk assessment in prostate cancer, though regional and volumetric assessments could offer modest added value. Full article
(This article belongs to the Special Issue Label-Free Cancer Detection)
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14 pages, 814 KiB  
Review
Menopause as a Critical Turning Point in Lipedema: The Estrogen Receptor Imbalance, Intracrine Estrogen, and Adipose Tissue Dysfunction Model
by Diogo Pinto da Costa Viana, Lucas Caseri Câmara and Robinson Borges Palau
Int. J. Mol. Sci. 2025, 26(15), 7074; https://doi.org/10.3390/ijms26157074 - 23 Jul 2025
Viewed by 1737
Abstract
Lipedema is a chronic, estrogen-sensitive adipose tissue disorder characterized by disproportionate subcutaneous fat accumulation, fibrosis, inflammation, and resistance to fat mobilization. Despite its high prevalence, lipedema remains poorly understood and frequently misdiagnosed. This narrative review proposes a novel pathophysiological model in which menopause [...] Read more.
Lipedema is a chronic, estrogen-sensitive adipose tissue disorder characterized by disproportionate subcutaneous fat accumulation, fibrosis, inflammation, and resistance to fat mobilization. Despite its high prevalence, lipedema remains poorly understood and frequently misdiagnosed. This narrative review proposes a novel pathophysiological model in which menopause acts as a critical turning point in the progression of lipedema, driven by estrogen receptor imbalance (ERβ predominance over ERα), intracrine estrogen excess, and adipose tissue dysfunction. We demonstrate how menopause amplifies adipose tissue dysfunction by suppressing ERα signaling; enhancing ERβ activity; and disrupting mitochondrial function, insulin sensitivity, and lipid oxidation. Concurrently, the upregulation of aromatase and 17β-HSD1, combined with the suppression of 17β-HSD2, sustains localized estradiol excess, perpetuating inflammation, fibrosis, and immune dysregulation. The molecular signature observed in lipedema closely mirrors that of other estrogen-driven gynecological disorders, such as endometriosis, adenomyosis, and uterine fibroids. Understanding these molecular mechanisms highlights the pivotal role of menopause as a catalyst for disease progression and provides a rationale for targeted therapeutic strategies, including hormonal modulation and metabolic interventions. This review reframes lipedema as an estrogen receptor-driven gynecological disorder, offering a new perspective to improve clinical recognition, diagnosis, and management of this neglected condition. Full article
(This article belongs to the Section Molecular Biology)
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12 pages, 874 KiB  
Article
Open-Label Uncontrolled, Monocentric Study to Evaluate the Efficacy and Safety of the Electromagnetic Field and Negative Pressure in the Treatment of Cellulite
by Antonio Scarano, Antonio Calopresti, Salvatore Marafioti, Gianluca Nicolai and Erda Qorri
Life 2025, 15(7), 1148; https://doi.org/10.3390/life15071148 - 21 Jul 2025
Viewed by 418
Abstract
Cellulite is a widespread aesthetical dermatological condition affecting a significant proportion of postpubertal women, characterized by dimpled skin, primarily on the thighs, buttocks, and hips, which has an important psychological impact. Cellulite, also called lipodystrophy or oedematosclerotic panniculitis, causes an aesthetic change in [...] Read more.
Cellulite is a widespread aesthetical dermatological condition affecting a significant proportion of postpubertal women, characterized by dimpled skin, primarily on the thighs, buttocks, and hips, which has an important psychological impact. Cellulite, also called lipodystrophy or oedematosclerotic panniculitis, causes an aesthetic change in the skin that affects the epidermis, dermis, hypodermis and subcutaneous fat in different ways. The aim of the present prospective study research was to evaluate the efficacy of electromagnetic field and negative pressure in the treatment of cellulite. Methods: A total of 35 women with an average age of 40, ranging from 18 to 50 (mean 32.2 ± 7.48), with a body mass index between 18.5 and 26.9 (mean 22 ± 3.01), were enrolled in this study. The degree of cellulite of the patients was assessed clinically using the Cellulite Severity Scale (CSS) and Nürnberger–Müller classification. All patients received one session per week for a total 12 treatment sessions with Bi-one® LifeTouchTherapy medical device (Expo Italia Srl—Florence—Italy), which generates a combination of vacuum and electromagnetic fields (V-EMF). Total treatment time was approximately 20–30 min per patient. The GAIS score, Cellulite Severity Scale (CSS) and Nürnberger–Müller classification for cellulite was evaluated 1 month after the 12 treatments with LifeTouchTherapy. Results: A statistical difference was recorded in cellulite improvement by visual analog scale (VAS) and global aesthetic improvement scale (GAIS). Conclusions: The results of the present prospective clinical study show the efficacy and safety of Bi-one® LifeTouchTherapy in the treatment of cellulite. Electromagnetic fields combined with negative pressure therapy promote tissue regeneration and reduce fibrosis, which results in visible cosmetic improvements of cellulite. Full article
(This article belongs to the Collection Clinical Trials)
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16 pages, 2433 KiB  
Article
A Single-Cell Assessment of Intramuscular and Subcutaneous Adipose Tissue in Beef Cattle
by Mollie M. Green, Hunter R. Ford, Alexandra P. Tegeler, Oscar J. Benitez, Bradley J. Johnson and Clarissa Strieder-Barboza
Agriculture 2025, 15(14), 1545; https://doi.org/10.3390/agriculture15141545 - 18 Jul 2025
Viewed by 1353
Abstract
Deposition of intramuscular fat (IM), also known as marbling, is the deciding factor of beef quality grade in the U.S. Defining molecular mechanisms underlying the differential deposition of adipose tissue in distinct anatomical areas in beef cattle is key to the development of [...] Read more.
Deposition of intramuscular fat (IM), also known as marbling, is the deciding factor of beef quality grade in the U.S. Defining molecular mechanisms underlying the differential deposition of adipose tissue in distinct anatomical areas in beef cattle is key to the development of strategies for marbling enhancement while limiting the accumulation of excessive subcutaneous adipose tissue (SAT). The objective of this exploratory study was to define the IM and SAT transcriptional heterogeneity at the whole tissue and single-nuclei levels in beef steers. Longissimus dorsi muscle samples (9–11th rib) were collected from two finished beef steers at harvest to dissect matched IM and adjacent SAT (backfat). Total RNA from IM and SAT was isolated and sequenced in an Illumina NovaSeq 6000. Nuclei from the same samples were isolated by dounce homogenization, libraries generated with 10× Genomics, and sequenced in an Illumina NovaSeq 6000, followed by analysis via Cell Ranger pipeline and Seurat in RStudio (v4.3.2) By the expression of signature marker genes, single-nuclei RNA sequencing (snRNAseq) analysis identified mature adipocytes (AD; ADIPOQ, LEP), adipose stromal and progenitor cells (ASPC; PDGFRA), endothelial cells (EC; VWF, PECAM1), smooth muscle cells (SMC; NOTCH3, MYL9) and immune cells (IMC; CD163, MRC1). We detected six cell clusters in SAT and nine in IM. Across IM and SAT, AD was the most abundant cell type, followed by ASPC, SMC, and IMC. In SAT, AD made up 50% of the cellular population, followed by ASPC (31%), EC (14%), IMC (1%), and SMC (4%). In IM depot, AD made up 23% of the cellular population, followed by ASPC at 19% of the population, EC at 28%, IMC at 7% and SMC at 12%. The abundance of ASPC and AD was lower in IM vs. SAT, while IMC was increased, suggesting a potential involvement of immune cells on IM deposition. Accordingly, both bulk RNAseq and snRNAseq analyses identified activated pathways of inflammation and metabolic function in IM. These results demonstrate distinct transcriptional cellular heterogeneity between SAT and IM depots in beef steers, which may underly the mechanisms by which fat deposits in each depot. The identification of depot-specific cell populations in IM and SAT via snRNAseq analysis has the potential to reveal target genes for the modulation of fat deposition in beef cattle. Full article
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24 pages, 4222 KiB  
Article
Transcriptome and Cellular Evidence of Depot-Specific Function in Beef Cattle Intramuscular, Subcutaneous, and Visceral Adipose Tissues
by Alexandra P. Tegeler, Hunter R. Ford, Jean Franco Fiallo-Diez, Tainara C. Michelotti, Bradley J. Johnson, Oscar J. Benitez, Dale R. Woerner and Clarissa Strieder-Barboza
Biology 2025, 14(7), 848; https://doi.org/10.3390/biology14070848 - 11 Jul 2025
Viewed by 394
Abstract
Deposition of intramuscular adipose tissue (IMAT) is the primary determinant for beef quality grade in the U.S. Accumulation of subcutaneous (SCAT) and visceral (VIAT) adipose tissue precedes that of IMAT and often leads to excessive adiposity in beef cattle. Approaches to increase marbling [...] Read more.
Deposition of intramuscular adipose tissue (IMAT) is the primary determinant for beef quality grade in the U.S. Accumulation of subcutaneous (SCAT) and visceral (VIAT) adipose tissue precedes that of IMAT and often leads to excessive adiposity in beef cattle. Approaches to increase marbling while limiting subcutaneous and visceral adiposity are limited. Our objective is to define the depot-specific transcriptome profile and adipocyte function in IMAT, SCAT, and VIAT in beef steers. Transcriptomics revealed the upregulation of adipogenic and lipogenic genes in SCAT and VIAT vs. IMAT. Functional transcriptome analysis demonstrated the activation of pathways for lipid metabolic processes and biosynthesis in SCAT, accompanied by increased preadipocyte proliferation, adipocyte size, and insulin responses of SCAT in vitro. While IMAT had a greater abundance of preadipocytes, they proliferated at a lower rate and differentiated into adipocytes that were smaller and less responsive to insulin compared to SCAT. The upregulation of extracellular matrix genes in IMAT suggests that fat accumulation may be limited by the muscle microenvironment. The activation of inflammatory and immune response pathways, combined with a higher abundance of immune cells, highlighted VIAT as an immune-responsive depot. Our findings reveal transcriptional and cellular profiles underlying fat deposition in SCAT, VIAT, and IMAT in beef cattle. Full article
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16 pages, 5542 KiB  
Article
Anti-Obesity and Metabolic Effects of Forskolin in Obese C57BL/6J Mice
by Mehrnaz Abbasi, Fang Zhou, Ngoc Kim Ly, Austin Taylor, Qiaobin Hu, Jinhua Chi, Haiwei Gu and Shu Wang
Int. J. Mol. Sci. 2025, 26(14), 6607; https://doi.org/10.3390/ijms26146607 - 10 Jul 2025
Viewed by 464
Abstract
Forskolin (FSK) induces the browning of white adipose tissue (WAT) through the activation of adenylate cyclase (AC) and cyclic adenosine monophosphate (cAMP) generation. When administered intravenously or orally, FSK undergoes significant metabolism and accumulation in the liver and other tissues, resulting in high [...] Read more.
Forskolin (FSK) induces the browning of white adipose tissue (WAT) through the activation of adenylate cyclase (AC) and cyclic adenosine monophosphate (cAMP) generation. When administered intravenously or orally, FSK undergoes significant metabolism and accumulation in the liver and other tissues, resulting in high side effects and low anti-obesity effects due to trivial amounts reaching WAT. This study examines the potential anti-obesity and metabolic effects of the inguinal WAT (IWAT) delivery of FSK in high-fat diet-induced C57BL/6J obese mice. Mice received one of the following treatments twice weekly for 4 weeks: 1. Control into both IWAT depots (Conboth); 2. FSK 15 mg/kg body weight (BW)/injection into both inguinal WAT (IWAT) depots (FSK15both); 3. FSK 7.5 mg/kg BW/injection into both IWAT depots (FSK7.5both); and 4. FSK 7.5 mg/kg BW/injection into the left IWAT depot (FSK7.5left). Both the FSK15both and FSK7.5both treatments improved metabolic parameters by lowering blood glucose, enhancing glucose tolerance, and reducing serum insulin and cholesterol. The FSK15both treatment had a greater impact on IWAT, resulting in smaller adipocytes and increased expression of Ucp1 and Tmem26 mRNA levels. All FSK treatments also reduced inflammatory and lipogenic markers in the liver, indicating improved hepatic metabolism. These findings suggest that local delivery of FSK into subcutaneous WAT is a potential strategy for combating obesity and improving metabolic health. However, further studies are needed to confirm the statistical and biological significance of these effects. Full article
(This article belongs to the Section Molecular Endocrinology and Metabolism)
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15 pages, 936 KiB  
Review
Lipodystrophy in HIV: Evolving Challenges and Unresolved Questions
by Marta Giralt, Pere Domingo, Tania Quesada-López, Rubén Cereijo and Francesc Villarroya
Int. J. Mol. Sci. 2025, 26(14), 6546; https://doi.org/10.3390/ijms26146546 - 8 Jul 2025
Viewed by 490
Abstract
The advent of effective antiretroviral therapy in the mid-1990s, which successfully prevented the progression to AIDS in people living with HIV (PLWH), was associated with the appearance of the so-called HIV-associated lipodystrophy. This condition involved subcutaneous fat atrophy; abdominal fat hypertrophy; and, in [...] Read more.
The advent of effective antiretroviral therapy in the mid-1990s, which successfully prevented the progression to AIDS in people living with HIV (PLWH), was associated with the appearance of the so-called HIV-associated lipodystrophy. This condition involved subcutaneous fat atrophy; abdominal fat hypertrophy; and, in some cases, lipomatosis. It was also associated with systemic metabolic disturbances, primarily insulin resistance and dyslipidemia. Following the replacement of certain antiretroviral drugs, particularly the thymidine-analog reverse transcriptase inhibitors stavudine and zidovudine, with less toxic alternatives, the incidences of lipoatrophy and lipomatosis significantly declined. However, lipodystrophy resulting from first-generation antiretroviral therapy does not always resolve after switching to newer agents. Although the widespread use of modern antiretroviral drugs—especially integrase strand transfer inhibitors and non-lipoatrophic reverse transcriptase inhibitors such as tenofovir alafenamide—has reduced the incidences of severe forms of lipodystrophy, these regimens are not entirely free of adipose tissue-related effects. Notably, they are associated with weight gain that resembles common obesity and can have adverse cardiometabolic consequences. Recent evidence also suggests the hypertrophy of specific fat depots, such as epicardial and perivascular adipose tissue, in PLWH on last-generation treatments, potentially contributing to increased cardiovascular risk. This evolving landscape underscores the persistent vulnerability of PLWH to adipose tissue alterations. While these morphological changes may not be as pronounced as those seen in classic HIV-associated lipodystrophy, they can still pose significant health risks. The continued optimization of treatment regimens and the vigilant monitoring of adipose tissue alterations and metabolic status remain essential strategies to improve the health of PLWH. Full article
(This article belongs to the Special Issue Molecular Insights into Lipodystrophy)
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10 pages, 1656 KiB  
Brief Report
Inverse Association of Longitudinal Variations in Fat Tissue Radiodensity and Area
by Giulia Besutti, Marta Ottone, Efrem Bonelli, Simone Canovi, Roberto Farì, Francesco Farioli, Annarita Pecchi, Guido Ligabue, Massimo Pellegrini, Pierpaolo Pattacini and Paolo Giorgi Rossi
Diagnostics 2025, 15(13), 1662; https://doi.org/10.3390/diagnostics15131662 - 30 Jun 2025
Viewed by 435
Abstract
Increased CT-derived fat tissue radiodensity has been indicated as a poor prognostic factor in oncological settings, although the reasons are not clear. One hypothesis is that increased radiodensity may reflect the loss of fat droplets within adipocytes, being a proxy of recent weight [...] Read more.
Increased CT-derived fat tissue radiodensity has been indicated as a poor prognostic factor in oncological settings, although the reasons are not clear. One hypothesis is that increased radiodensity may reflect the loss of fat droplets within adipocytes, being a proxy of recent weight loss. This study aims to test this hypothesis by evaluating the association between longitudinal variations in fat tissue radiodensity and area in a cohort of COVID-19 patients. Baseline and 2–3-month follow-up chest CT scans of severe COVID-19 pneumonia survivors were retrospectively reviewed to measure subcutaneous, visceral, and intermuscular adipose tissue (SAT, VAT, and IMAT) areas and densities at the T7–T8 vertebrae, and longitudinal variations were computed for each variable. The associations between each compartment area and radiodensity variations (standardized values) were evaluated in univariate linear models and models adjusted by age and sex. A total of 196 COVID-19 survivors with suitable baseline and follow-up CT scans were included (mean age 65 ± 11 years, 62 (31.6%) females, 25% with diabetes and 2.6% with morbid obesity). Longitudinal variation in SAT area was inversely associated with longitudinal variation in SAT radiodensity in univariate models (coeff −0.91, 95%CI = −1.70/−0.12, p = 0.02) and after adjustment by age and sex (coeff −0.89, 95%CI = −1.7/−0.09, p = 0.03). The effect was similar and stronger for IMAT (coeff −2.1, 95%CI = −3.06/−1.19, p < 0.01 in adjusted models), and absent for VAT. Longitudinal variations in subcutaneous and intermuscular adipose tissue areas and densities are inversely associated. Higher adipose tissue radiodensity may be due to decrease in fat area (i.e., weight loss), explaining the poor prognostic effect found in cancer patients. Full article
(This article belongs to the Section Medical Imaging and Theranostics)
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20 pages, 10457 KiB  
Article
Unveiling the Regulatory Mechanism of Tibetan Pigs Adipogenesis Mediated by WNT16: From Differential Phenotypes to the Application of Multi-Omics Approaches
by Qiuyan Huang, Kunli Zhang, Fanming Meng, Sen Lin, Chun Hong, Xinming Li, Baohong Li, Jie Wu, Haiyun Xin, Chuanhuo Hu, Xiangxing Zhu, Dongsheng Tang, Yangli Pei and Sutian Wang
Animals 2025, 15(13), 1904; https://doi.org/10.3390/ani15131904 - 27 Jun 2025
Viewed by 379
Abstract
The aim of this study is to investigate the physiological characteristics and regulatory mechanisms of porcine intramuscular fat (IMF), subcutaneous fat (take back fat (BF), for example), and visceral fat (take perienteric fat (PF), for example) to address the challenge of optimizing meat [...] Read more.
The aim of this study is to investigate the physiological characteristics and regulatory mechanisms of porcine intramuscular fat (IMF), subcutaneous fat (take back fat (BF), for example), and visceral fat (take perienteric fat (PF), for example) to address the challenge of optimizing meat quality without excessive fat deposition. Many improved breed pigs have fast growth rates, high lean meat rates, and low subcutaneous fat deposits, but they also have low IMF content, resulting in poor meat quality. There is usually a positive correlation between intramuscular fat and subcutaneous fat deposits. This study selected eight-month-old female Tibetan pigs as experimental subjects. After slaughter, fat samples were collected. Histological differences in adipocyte morphology were observed via hematoxylin–eosin (HE) staining of tissue sections, and phenotypic characteristics of different adipose tissues were analyzed through fatty acid composition determination. Transcriptome sequencing and untargeted metabolomics were employed to perform pairwise comparisons between different fatty tissues to identify differentially expressed genes and metabolites. A siRNA interference model was constructed and combined with Oil Red O staining and lipid droplet optical density measurement to investigate the regulatory role of WNT16 in adipocyte differentiation. Comparative analysis of phenotypic and fatty acid composition differences in adipocytes from different locations revealed that IMF adipocytes have significantly smaller areas and diameters compared to other fat depots and contain higher levels of monounsaturated fatty acids. Integrated transcriptomic and metabolomic analyses identified differential expression of WNT16 and L-tyrosine, both of which are involved in the melanogenesis pathway. Functional validation showed that inhibiting WNT16 in porcine preadipocytes downregulated adipogenic regulators and reduced lipid droplet accumulation. This cross-level regulatory mechanism of “phenotype detection–multi-omics analysis–gene function research” highlighted WNT16 as a potential key regulator of site-specific fat deposition, providing new molecular targets for optimizing meat quality through nutritional regulation and genetic modification. Full article
(This article belongs to the Section Pigs)
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16 pages, 1649 KiB  
Article
Osteoprotective Effect of Pine Pollen in Orchidectomized Rats
by Paweł Polak, Radosław P. Radzki, Marek Bieńko, Sylwia Szymańczyk, Kinga Topolska, Małgorzata Manastyrska-Stolarczyk and Jarosław Szponar
Nutrients 2025, 17(13), 2110; https://doi.org/10.3390/nu17132110 - 25 Jun 2025
Viewed by 455
Abstract
Background/Objectives: This study aimed to establish the potential osteotropic effect of pine pollen on bone metabolism in male rats during the development of osteopenia induced by orchidectomy (ORX). We also established the effect of gonadectomy and pine pollen on the characteristics of [...] Read more.
Background/Objectives: This study aimed to establish the potential osteotropic effect of pine pollen on bone metabolism in male rats during the development of osteopenia induced by orchidectomy (ORX). We also established the effect of gonadectomy and pine pollen on the characteristics of calf muscles. Methods: This study was conducted using 40 male Wistar rats divided into one sham-operated (SHO) and four ORX groups. The SHO rats and one ORX group (negative control) were treated with physiological saline (PhS). The remaining ORX groups received exclusively testosterone (positive control) and two doses of pine pollen (50 and 150 mg/kg b.w.), respectively. The rats were killed 60 days later and their right tibia and left pelvic limbs were isolated. The tibia was analyzed using densitometry, computed tomography, and a bending machine to determine densitometry, structure, and mechanical properties, respectively. The left pelvic limb allowed for measurements of area, density, and fat tissue in the calf muscle. Results: The dose of 150 mg/kg b.w. inhibited the development of atrophic changes, both in the cortical and trabecular bone tissue. The dose of 50 mg/kg b.w. also has a protective effect on bones but is less pronounced and concerns only the trabecular bone tissue. The higher dose of pine pollen inhibited the catabolism of the calf muscles by maintaining the density and surface area as in the SHO group. It also limited the accumulation of intramuscular and subcutaneous adipose tissue. Conclusions: It is worth emphasizing the osteoprotective effectiveness of pine pollen, especially when administered in larger doses, which demonstrates the possibility of its use in the prevention of the development of osteoporosis in males. Full article
(This article belongs to the Section Phytochemicals and Human Health)
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17 pages, 430 KiB  
Article
Effect of Rumen-Protected Cod Liver Oil Supplementation on Fatty Acid Profile of Meat from Limousin and Red Angus Cattle
by Andrzej Zachwieja, Ewa Pecka-Kiełb, Anna Zielak-Steciwko, Bożena Króliczewska, Jowita Kaszuba and Robert Kupczyński
Animals 2025, 15(13), 1856; https://doi.org/10.3390/ani15131856 - 23 Jun 2025
Viewed by 348
Abstract
In beef cattle production, both diet and breed are key factors influencing the composition and quality of meat. This study evaluated the effects of rumen-protected cod liver oil supplementation on meat and fat quality parameters in Limousin (n = 30) and Red [...] Read more.
In beef cattle production, both diet and breed are key factors influencing the composition and quality of meat. This study evaluated the effects of rumen-protected cod liver oil supplementation on meat and fat quality parameters in Limousin (n = 30) and Red Angus (n = 30) bulls maintained under identical conditions. During the final three weeks of finishing, animals received 100/g/day of cod liver oil. Red Angus bulls exhibited a significantly higher intramuscular fat content in meat compared to Limousin (p < 0.01). The study demonstrated a reduction (p < 0.05) in intramuscular fat content in both breeds receiving cod liver oil supplementation. In Limousin, cis-oleic acid (C18:1 cis-9) levels increased significantly in meat (p < 0.05) without a concurrent increase in trans isomers. Subcutaneous fat in both breeds showed a significant increase in monounsaturated fatty acids in the supplemented group compared to the control (p < 0.01). Limousin bulls also showed reduced levels of myristic acid (C14:0) and stearic acid (C18:0) in subcutaneous fat. Additionally, Limousin muscle tissue showed significantly higher (p < 0.01) concentrations of C18:3n3, C22:6n3, and total polyunsaturated fatty acids (PUFAs) compared to Red Angus. These finding indicate that the short-term dietary inclusion of rumen-protected cod liver oil in cattle rations enhances the nutritional profile of beef, potentially offering benefits for human health. Full article
(This article belongs to the Special Issue Beef Cattle Feedlot: Nutrition, Production and Management)
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9 pages, 2176 KiB  
Article
Phalloplasty in Children with Severe Penile Tissue Loss: Single Center Case Series
by Gokhan Demirtas, Suleyman Tagcı, Derya Yayla, Hasan Murat Ergani, Gunay Ekberli, Bilge Karabulut and Huseyin Tugrul Tiryaki
Medicina 2025, 61(7), 1124; https://doi.org/10.3390/medicina61071124 - 22 Jun 2025
Viewed by 483
Abstract
Background and Objectives: Penile tissue loss, which can be an acquired condition due to trauma or infection, but is also seen in congenital anomalies, is a rare condition in children. A standard surgical approach is often not possible due to the different degrees [...] Read more.
Background and Objectives: Penile tissue loss, which can be an acquired condition due to trauma or infection, but is also seen in congenital anomalies, is a rare condition in children. A standard surgical approach is often not possible due to the different degrees and etiologies of penile tissue loss. The continuing growth and the presence of various congenital anomalies in children require a different penile reconstruction approach than in adults. We aimed to share our experience and surgical results with children in whom we performed penile reconstruction with different techniques due to penile tissue loss. Materials and Methods: Ten cases that underwent penile reconstruction between 2018 and 2023 were evaluated retrospectively. Age at initial operation, associated anomalies, surgical technique, and other related surgical attempts, as well as functional and cosmetic results, were recorded. Results: Ten boys aged between 6 months and 17 years underwent phalloplasty due to penile tissue absence. In six cases, penile tissue loss was due to acquired causes, and in four cases, congenital anomalies were the reason. The most common cause of penile tissue loss was circumcision complications. In four cases, penile reconstruction was achieved by mobilization of the remaining corpus cavernosum tissues, in two cases, the cavernous tissue was adequate and repaired with glansplasty and penile skin graft. Phalloplasty was performed by tubularization of a skin and subcutaneous fat flap, removed from the pubic region and scrotal region, in two cases. A microvascular radial forearm flap was performed in a 17-year-old patient with penile tissue loss because of trauma, and a free skin flap taken from the forearm was used for penile reconstruction. Thirty percent of patients required a second surgery. Urinary continence was present in eight of the cases. Although four cases were classified as cosmetically unsatisfactory in our evaluation, all patients and their families reported being satisfied with the cosmetic results. Conclusions: Penile reconstruction for penile tissue loss in children should be performed in clinics where different scenarios can be applied. With maximum preservation and mobilization of existing cavernous tissues, temporary penile reconstruction with local flaps should be performed in young children at an early stage to minimize the psychological effects of penile absence. Although an esthetically perfect result cannot be guaranteed, patients and families are generally satisfied with the outcome. Full article
(This article belongs to the Section Urology & Nephrology)
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16 pages, 3263 KiB  
Review
Targeting Programmed Cell Death in Flap Ischemia/Reperfusion Injury
by Shengyue Liu, Xiaohe Xiong, Lei Chen, Jiaqi Hu, Ping Luo, Zhanpeng Ou and Fugui Zhang
Biomolecules 2025, 15(7), 911; https://doi.org/10.3390/biom15070911 - 20 Jun 2025
Viewed by 475
Abstract
A skin flap is a composite tissue unit comprising skin and subcutaneous fat with an intact vascular supply. Skin flaps are commonly employed for wound reconstruction, transplantation of damaged tissues, and cosmetic procedures. However, flap necrosis resulting from ischemia/reperfusion injury (IRI) is a [...] Read more.
A skin flap is a composite tissue unit comprising skin and subcutaneous fat with an intact vascular supply. Skin flaps are commonly employed for wound reconstruction, transplantation of damaged tissues, and cosmetic procedures. However, flap necrosis resulting from ischemia/reperfusion injury (IRI) is a frequent complication, leading to surgical failure. Therefore, This review systematically summarizes the mechanisms and therapeutic interventions targeting specific modalities of programmed cell death (PCD) in the context of IRI compromising flap survival. These interventions encompass a range of strategies, including preconditioning, systemic administration, and local drug delivery. Furthermore, we summarize key therapeutic targets for various types of PCD, along with shared pathways and therapies applicable across multiple PCD modalities. The findings presented in this review validate the feasibility of targeted therapies against PCD to prevent post-reconstructive flap necrosis. These findings provide novel strategies, such as targeting common pathways in PCD and leveraging diverse biomaterials, to enhance therapeutic outcomes. Further clinical investigations are warranted to target PCD pathways for the treatment of flap necrosis. Full article
(This article belongs to the Special Issue Necrotic Cell Death Mechanisms and Therapies)
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Brief Report
β-Hydroxybutyrate Reduces Body Weight by Modulating Fatty Acid Oxidation and Beiging in the Subcutaneous Adipose Tissue of DIO Mice
by Violeta Heras, Virginia Mela, Pallavi Kompella, Elena Rojano, Guillermo Paz-López, Lucia Hurtado-García, Almudena Ortega-Gomez, Maria José García-López, María Luisa García-Martín, Juan A. G. Ranea, Francisco J. Tinahones and Isabel Moreno-Indias
Int. J. Mol. Sci. 2025, 26(11), 5064; https://doi.org/10.3390/ijms26115064 - 24 May 2025
Viewed by 733
Abstract
β-hydroxybutyrate (BHB) serves as an alternative cellular fuel during states of low glucose availability, such as fasting or carbohydrate restriction, when the body shifts to using fats and ketone bodies for energy. While BHB has shown potential metabolic benefits, its mechanisms of action [...] Read more.
β-hydroxybutyrate (BHB) serves as an alternative cellular fuel during states of low glucose availability, such as fasting or carbohydrate restriction, when the body shifts to using fats and ketone bodies for energy. While BHB has shown potential metabolic benefits, its mechanisms of action in the context of obesity are not fully understood. In this study, we examined the effects of BHB supplementation on subcutaneous adipose tissue (SAT) metabolism in a diet-induced obesity (DIO) mouse model. Adult male mice were first fed a high-fat diet for six weeks, followed by a standard diet with or without BHB supplementation for an additional six weeks. BHB supplementation led to significant body weight loss independent of food intake. This weight reduction was associated with decreased adipocyte differentiation, reflected by reduced peroxisome proliferator-activated receptor gamma (PPARγ) protein levels and lower uncoupling protein 1 (UCP1) expression, indicating altered SAT function. Transcriptomic analysis of SAT revealed upregulation of genes involved in fatty acid activation and transport (e.g., Slc27a2, Plin5, Acot4, Acsm3, Rik). Functional enrichment highlighted the activation of the PPAR signaling pathway and enrichment of peroxisomal components in the BHB group. Together, these results suggest that BHB promotes lipid remodeling in SAT, enhancing fatty acid metabolism while suppressing thermogenic pathways, and thus may represent a novel mechanism contributing to adiposity reduction and metabolic improvement. Full article
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