Serum Leptin Levels Research Articles

Assessment of Serum Adiponectin and Leptin in Chronic Preiodontitis Over Healthy Individuals

ABSTRACT Objective: The objective of the research was to ascertain whether serum levels of the biochemical markers adiponectin and leptin are related to clinical periodontal characteristics. Materials and Method: For the study, 20 people with chronic periodontitis (Group A) and 20 healthy people (Group B) were enrolled. Assessments were conducted on periodontal markers, including bleeding on probing (POP), gingival index (GI), plaque index (PI), probing pocket depth (PPD), and clinical attachment level (CAL). An enzyme-linked immunosorbent assay (ELISA) test was used to assess the levels of adiponectin and leptin in serum samples. Result: There was significant elevation in average level of leptin in chronic periodontitis in association to that in healthy group. On the other hand, there was considerable decrease in serum adiponectin in group A in association to healthy group. The ratio of leptin\adiponectin was appreciably greater amongst periodontitis group compared to healthy group. Conclusion: The current investigation leads us to the conclusion that the pathophysiology of periodontitis is significantly influenced by serum levels of adiponectin and leptin.

Increased serum leptin levels are associated with metabolic syndrome and semen parameters in patients with infertility.

This study aims to ascertain the associations between serum leptin levels and metabolic syndrome and semen parameters in patients with infertility. A total of 200 patients who were diagnosed as primary infertility in our hospital were enrolled in this study, and they were divided into MetS group and non-MetS group. About 30 healthy men were enrolled as the control group. The general information, blood lipids, reproductive hormones and semen parameters were collected. We used the Student t test, the Chi-square test, the Kruskal-Wallis test, and the spearman correlation analysis to analyze their relationships. BMI, glucose, TG, follicle-stimulating hormone (FSH), and leptin were significantly higher in MetS infertile patients (P < .001; P < .005; P < .001; P < .001; and P < .001, respectively). While T and high-density lipoprotein (HDL) were significantly lower in MetS infertile patients (P < .01, and P < .001, respectively). Leptin was correlated with sperm progressive motility (R = -0.312, P < .01), and normal morphology (R = -0.458, P < .001). Moreover, sperm concentration was correlated with FSH (R = -0.268, P < .001) and inhibin B (R = 0.401, P < .001), and normal morphology was correlated with HDL (R = 0.233, P < .001) and TG (R = -0.182, P < .01). In primary infertile patients, sperm normal morphology were found to be depressed and related to MetS. Leptin was increased in patients diagnosed with MetS and associated with semen parameters.

Dietary acid load adopts the effect of ApoB ins/del genetic variant (rs11279109) on obesity trait, cardiovascular markers, lipid profile, and serum leptin level among patients with diabetes: a cross-sectional study

ApoB insertion/deletion (ins/del) genetic variant (rs11279109) is thought to be related to cardio-metabolic markers and obesity. This association has the potential to be modified by dietary patterns. Since the majority of studies concerned the role of dietary acid load (DAL) or ApoB in type 2 diabetes mellitus (T2DM) and its complications independently, and due to the insufficient data regarding the possible interactions between ApoB genetic variants and DAL on anthropometric and metabolic markers, we aimed to study the interaction between this genetic variant and dietary acid load (DAL) on cardio-metabolic markers, along with leptin among Iranian individuals with T2DM. 700 T2DM patients were randomly recruited. A validated semi-quantitative food frequency questionnaire was used for DAL calculation including potential renal acid load (PRAL) and net-endogenous acid production (NEAP). The polymerase chain reaction was used for genotyping the ApoB ins/del (rs11279109). The general linear model was applied to find the interactions in the crude and adjusted models. Patients with del/del genotype (rs11279109) with high PRAL intake have lower low-density lipoprotein cholesterol (LDL-C) (Pinteraction = 0.004), LDL/HDL ratio (Pinteraction = 0.02), total cholesterol (TC) (Pinteraction = 0.04), triglyceride (TG) (Pinteraction = 0.04), leptin (Pinteraction = 0.04) and interleukin-18 (IL-18) (Pinteraction = 0.04). Moreover, the interaction of gene and DAL in the PRAL method on TG concentration (P = 0.04), waist circumference (WC) (P = 0.04), and LDL/HDL ratio (P = 0.04) were significant. Eventually, a positive relationship was observed between the presence of the del/del genotype (rs11279109) and higher levels of TG, TC, LDL-C, IL-18, and LDL/HDL, in individuals with lower adherence to DAL, after adjusting for various covariates. Further studies are needed to investigate and confirm these findings.

Evaluation of Adipose Tissue Hormones and Tumor Necrosis factor in Patients with Endometriosis

Objective: To evaluate levels of physiological parameters (Testosterone, follicle stimulating hormone FSH, luteinizing hormone LH, leptin and tumor necrosis factor TNF-α, Adipsin and Ghrelin), Total antioxidant capacity-TAC, Glutathione S transfers -GST in sera of patients with endometriosis. Method: This study involved (85) women within reproductive age (25-40) years, who were distributed into two groups: patientsʹ group (55) women diagnosed with endometriosis, and (30) healthy control women. The study was carried out at Al-Karkh Maternity Hospital/ Baghdad and extended from 20/4/2024 to 20/5/2024. The pathological cases of patients were diagnosed by clinical examinations and confirmed by specialist physician with ultrasound examination. Blood samples were taken from both groups, serum was separated for each individual by a centrifuge. Results: a significant rise in the (FSH, Leptin, TNF -α, Adipisin) while a significant decrease in levels of (Testosterone , LH, GST, TAC, Ghrelin) concentration were found in the sera of patients compered to healthy women , with a probability of P ≤ 0.05. According to Receiver operating characteristic (ROC) statistical analysis, Area under curve (AUC ) for LH, leptin, TNF -α, adipsin, ghrelin, GST, TAC were closely or equal to (1) for patients . Conclusion: serum levels of LH, Leptin, Adipisin, Gherlin, TNF-α and GST can be dependable as prognostic indicator markers that reflect the degree of oxidative stress accompanying endometriosis.

Delphinidin or α-amyrin attenuated liver steatosis and metabolic disarrangement in rats fed a high-fat diet.

Non-alcoholic fatty liver disease (NAFLD) is a liver pathology concomitant with metabolic disarrangement. This study assessed the therapeutic impacts of delphinidin, an anthocyanin, or α-amyrin, a pentacyclic triterpenoid, on NAFLD in rats and the underlying mechanisms involved. NAFLD was established by feeding a high-fat diet (HFD) for 10 weeks, either alone or in combination with delphinidin (40 mg/kg, oral) or α-amyrin (20 mg/kg, oral). Delphinidin or α-amyrin ameliorated the metabolic and histopathological perturbations induced by HFD. These compounds markedly attenuated NAFLD-induced hepatic steatosis, as evidenced by a substantial decrease in body weight, insulin resistance, and liver and adipose tissue indices. Alongside normalization of the atherogenic index, both improved HFD-mediated abnormalities in serum lipids, liver enzymes, leptin, and ghrelin levels. Moreover, their intervention activated the NFE2 like bZIP transcription factor 2 and heme oxygenase 1 pathways and abrogated HFD-triggered activation of mitogen-activated protein kinase 1 signaling. These remedies inhibited hepatic apoptosis and modulated the gene expression of lipogenic enzymes. Furthermore, histological analysis corroborated the suppression of lipid accumulation and amelioration of hepatic architecture in the treated rats. Our findings highlight the hepatoprotective value of delphinidin or α-amyrin against NAFLD and related metabolic diseases through their insulin-sensitizing, anti-inflammatory, antioxidant, and antiapoptotic effects.

Anti-Obesity Effects of a Collagen with Low Digestibility and High Swelling Capacity: A Human Randomized Control Trial

Background/Objectives: Collagen is a protein formed by very long amino acid chains. When conveniently treated, it can incorporate water into the net, thus increasing its volume and mass. The present work aimed to evaluate the potential anti-obesity effects of bovine collagen that has been technologically treated to increase its water retention capacity in an acid pH medium, with the objective of inducing satiation. Methods: Collagen’s digestibility was tested with a pepsin digestion test. Its swelling capacity was tested in an acid pH medium simulating gastric conditions. Postprandial levels of ghrelin in response to collagen supplementation were tested in rats. In a randomized control trial, 64 subjects with overweight/obesity were allocated in two groups: supplemented daily with two protein bars enriched with collagen (20 g per day) for 12 weeks, or control group. Anthropometric and biochemical measurements were assessed in all the participants. Results: This collagen showed a low digestibility (&lt;60%) and high swelling capacity (&gt;1900%) in vitro. In humans with overweight and obesity, this collagen significantly reduced body weight, body mass index (BMI), systolic blood pressure (SBP), and fatty liver index (FLI) and increased fat-free mass when compared with the control group. A significant reduction in the sarcopenic index; total, troncular, and visceral fat (measured by DEXA); and serum leptin levels were observed in the collagen group at the end of the intervention, with no differences with respect to controls. Collagen reduced the sensation of hunger and increased fullness and satisfaction. In male Wistar rats, collagen decreased postprandial blood ghrelin levels. Conclusions: Collagen supplementation (20 g per day for 12 weeks) reduced body weight, BMI, waist circumference, fat mass, FLI, and SBP in humans with overweight and obesity, which might be related to the increased sensation of fullness and satisfaction reported by the volunteers after the intake.

Correlations of cognitive function with serum levels of homocysteine, sex hormone binding globulin, and leptin in patients with schizophrenia

Objective: To investigate the correlations of cognitive function with serum levels of homocysteine (Hcy), sex hormone binding globulin (SHBG), and leptin in patients with schizophrenia. Methods: This was retrospective study. This study included 58 patients with schizophrenia (SCZ) as observation group and 60 clinically healthy individuals as control group admitted to Xiangshan County Hospital of Traditional Chinese Medicine Medical and Health Group Third Hospital from March 2022 to June 2023. Serum levels of Hcy, SHBG, and leptin in the two groups were measured, and Pearson correlation analysis was conducted to investigate the correlations between the Hcy, SHBG, and leptin levels and the psychiatric symptoms and cognitive function in the observation group. Results: The Hcy and SHBG levels in the observation group were significantly higher than those in the control group (p&lt;0.05, respectively), and the leptin level was lower than that in the control group (p&lt;0.05). The observation group scored significantly lower than the control group for each dimension of the MCCB (p&lt;0.05, respectively). In the observation group, Hcy was positively correlated with negative symptoms and the PANSS total score (p&lt;0.05, respectively) and was negatively correlated with scores for the leptin was negatively correlated with negative symptoms and the PANSS total score (p&lt;0.05, respectively) and was positively correlated with scores for speed of processing (SOP), WMS-III, BVMT, and MSCEIT (p&lt;0.05, respectively). Conclusions: Increased levels of Hcy and SHBG and decreased leptin are strongly associated with the occurrence of cognitive impairment in SCZ cases. Therefore, clinical observation and monitoring of these markers can help identify changes in patient conditions. doi: https://doi.org/10.12669/pjms.40.10.8923 How to cite this: Xu Y, Qian X, Zhang M, Liang M. Correlations of cognitive function with serum levels of homocysteine, sex hormone binding globulin, and leptin in patients with schizophrenia. Pak J Med Sci. 2024;40(10):2319-2323. doi: https://doi.org/10.12669/pjms.40.10.8923 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

The diagnostic value of leptin for the detection of liver steatosis in postmenopausal obese women

Introduction. More than half of post-reproductive age women are overweight and obese, which puts them at high risk of developing non-alcoholic fatty liver disease (NAFLD). In the abdominal type of obesity, adipose tissue dysfunction and impaired leptin secretion develop.Aim. To evaluate the possibilities and diagnostic characteristics of leptin for the determination of liver steatosis in pre-obese and obese women in the early postmenopausal period.Materials and methods. 76 women in the early postmenopausal period were examined, including 63 patients with NAFLD and overweight and obesity with an average age of 50.50 ± 2.16 years and 13 practically healthy women with an average age of 49.29 ± 2.64 years, who underwent an ultrasound examination of the liver, calculation of the HSI index (Hepatic Steatosis Index) and determination of the level of leptin in the blood.Results. Abdominal type of obesity was detected in 84% of patients, the gynoid type was 16%, and the body mass index averaged 33.5 ± 1.3 kg/m2. According to the ultrasound examination and the HSI index, all patients had liver steatosis. Their leptin levels significantly exceeded the control data (p &lt; 0.001) and directly correlated with the severity of steatosis according to the HSI index (r = 0.321; p = 0.010). The threshold value of the serum leptin level in patients with NAFLD was 13 ng/ml with sensitivity and specificity of 90.5% and 92.3%, respectively.Conclusion. Leptin is a highly informative marker of NAFLD in women with pre-obesity and obesity in the early postmenopausal period, the value of which is higher or equal to 13 ng/ml allows to verify steatosis, less than this value – to exclude it in this category of persons with high diagnostic effectiveness.

Lactobacillus gasseri BNR17 and Limosilactobacillus fermentum ABF21069 Ameliorate High Sucrose-Induced Obesity and Fatty Liver via Exopolysaccharide Production and β-oxidation.

Obesity and metabolic dysfunction-associated fatty liver disease (MAFLD) are prevalent metabolic disorders with substantial global health implications that are often inadequately addressed by current treatments and may have side effects. Probiotics have emerged as promising therapeutic agents owing to their beneficial effects on gut health and metabolism. This study investigated the synergistic effects of a probiotic combination of BNR17 and ABF21069 on obesity and MAFLD in C57BL/6 mice fed a high-sucrose diet. The probiotic combination significantly reduced body weight and fat accumulation compared with the high-sucrose diet. It also alleviated elevated serum leptin levels induced by a high-sucrose diet. Histological analysis revealed a significant reduction in white adipose tissue and fatty liver in the mice treated with the probiotic combination. Furthermore, increased expression of genes related to β-oxidation, thermogenesis, and lipolysis suggested enhanced metabolic activity. The probiotic groups, particularly the BNR17 group, showed an increase in fecal exopolysaccharides, along with a tendency toward a lower expression of intestinal sugar transport genes, indicating reduced sugar absorption. Additionally, inflammatory markers in the liver tissue exhibited lower expression in the ABF21069 group than in the HSD group. Despite each strain in the combination group having distinct characteristics and functions, their combined effect demonstrated synergy in mitigating obesity and MAFLD, likely through the modulation of fecal exopolysaccharides content and improvement in lipid metabolism. These findings underscore the potential of probiotic supplementation as a promising assistant therapy for managing obesity and MAFLD and provide valuable insights into its therapeutic mechanisms in metabolic disorders.

Effect of Bypass Fat on Genital Status and Blood Biochemical Profiles in Pubertal Swamp Buffalo Heifers and Puerperal Swamp Buffalo Cows

Background: The interaction between nutrition and reproduction has long been known to have important implications for the reproductive performance in animal.The present study highlights the effect of by-pass fat supplementation on genital changes and blood biochemical profile in pubertal swamp buffalo heifers and puerperal swamp buffalo cows. Methods: 24 heifers of 2-2.5 years of age and 24 puerperal cows on the day of parturition, irrespective of parity were used as experimental animal. The analytical method was based on the treatment protocols of 3 groups in both heifers and cows (n=8 in each group) viz., treated with oral bypass fat alone (I), oral bypass fat, mineral mixtures and injectable phosphorus (II) and control (III) respectively. Genital status, metabolic hormone (leptin, Ghrelin and IGF-1), reproductive hormone (estrogen and progesterone) and mineral constituents (calcium, phosphorus, zinc and copper) were analyzed on day 0, day 15 and day 30 in heifers and day 15, day 30 and day 45 in cows respectively. Result: Feeding of bypass fat alone or bypass fat fortified with minerals and injectable phosphorus was not found to induce significant genital changes in heifers and cows. The serum leptin and IGF-1 levels were increased significantly (p less than 0.05) in heifers at day 30 in Group I and II. However, a significant rise (p less than 0.05) of leptin was recorded at day 45 in group I and II cows. IG1-1 level was recorded increased significantly only in cows treated with fortified bypass fat (Group II). With the progression of treatment the serum phosphorus level was increased significantly (p less than 0.05) in Group I and II cows. Serum estrogen levels were increased in both heifers and cows with progression of treatment in both Group I and II. However, serum progesterone levels were increased significantly only in heifers of Group I and II with progression of treatment.

New Insights into Health Conditions Related to Malfunctions in Clock Genes

Chronotypes play a crucial role in regulating sleep–wake cycles and overall health. The aim of this study was to investigate chronotype, sleep quality, polymorphisms of clock genes and the level of leptin in serum. We used standardized questionnaires to assess chronotype and sleep quality. Genetic analysis was performed to determine the selected clock gene polymorphism. Serum leptin level was measured by the Elisa method. The results showed that serum leptin concentration was elevated in women, as well as in men who had a high waist-to-hip ratio (WHR) and body mass index (BMI). The evidence indicated that younger students (&lt;22 years old) were most likely to experience poor sleep quality. Nevertheless, our multivariate analysis revealed that young age and a morning-oriented chronotype were associated with better sleep quality. We noted that clock gene polymorphisms were present in 28.6% of the participants. Moreover, polymorphisms of PER1 c.2247C&gt;T (rs2735611) and PER2 c.-12C&gt;G (rs2304672) genes were associated with serum leptin level and chronotype, respectively. These findings provide insights into the relationships between chronotype, sleep quality, clock gene polymorphisms and obesity risk in biomedical students. Understanding these factors can contribute to better sleep management and potential interventions to improve health outcomes in humans.

The Role of Adipokines between Genders in the Pathogenesis of Osteoarthritis

Osteoarthritis (OA) is a chronic, progressive, degenerative joint disease characterized by joint pain, stiffness, and limited movement. It presents significant intra- and inter-individual variability—in particular, between genders. Recent research has increasingly focused on the role of adipokines—especially leptin, adiponectin, and resistin—in the development of OA. Adipokines, peptide hormones primarily secreted by adipose tissue, are involved in crucial physiological processes related to metabolism and immunity. They can also impact bone and cartilage turnover by interacting with joint cells such as osteoblasts, osteoclasts, chondrocytes, and mesenchymal stem cells, thereby linking inflammation with bone cartilage homeostasis. This review aims to elucidate the structure and functions of various adipokines, their serum and synovial levels, and their association with clinical presentation and radiographic progression in OA patients, with a focus on differences between sexes. A narrative literature review was conducted using three databases specifically analyzing sex differences. OA patients generally show elevated serum and synovial levels of leptin, chemerin, and visfatin, as well as high plasma levels of resistin and visfatin. In contrast, synovial levels of adiponectin and omentin are reduced in OA patients compared to healthy individuals, with an inverse relationship to disease severity, suggesting a potential protective role. Resistin and leptin were positively correlated with pain severity and radiographic progression, while adiponectin’s role in OA remains controversial. Regarding sex differences, male OA patients exhibited higher serum levels of leptin, chemerin, and omentin compared to healthy controls, with a positive correlation to the BMI and estrogen levels, potentially explaining the sexual dimorphism observed in this condition. Studies on visfatin and lipocalin did not reveal significant differences in synovial or serum levels between the sexes. The role of resistin remains controversial. Adipokines influence the joint microenvironment and contribute to the progression of osteoarthritis (OA). However, the precise biological mechanisms are not yet fully understood due to the complex interactions between the metabolic, mechanical, and immune systems. Further research is needed to clarify their roles in OA and to identify targeted therapies for managing this degenerative disease.

Origins of obesity in the womb: Fetal adiposity and its determinants.

Birth weight is an important predictor of perinatal complications and long-term health outcomes of offspring. Fetal programming influenced by maternal obesity, overnutrition, and hyperglycemia has been proposed as the fuel overload hypothesis. Recent investigations related with fetal body composition have revealed that neonatal adiposity can be predicted by fetal fat mass, and that maternal insulin resistance and serum leptin level are indicators of fetal adiposity. Based on the current evidence, the origins of obesity can partly be traced back into the fetal life. Further clarification of the determinants of fetal fat mass may lead to the clinical interventions and treatment strategies for fetal growth and development. This effort potentially leads to the elucidation of pathological conditions related with long-term health outcomes and the primary prevention of childhood obesity and early onset metabolic syndrome.

The effect of hydrophilic statins on adiponectin, leptin, visfatin, and vaspin levels in streptozocin-induced diabetic rats.

Statins may affect glucose metabolism through adipokines. The aim of this study was to measure the effects of hydrophilic statins on the levels of several adipokines in diabetic rats. Wistar albino rats were divided into four groups: healthy control, untreated diabetic, diabetic treated with pravastatin, and diabetic treated with rosuvastatin. Diabetes was induced by intraperitoneal injection of STZ. Thereafter, 20 mg/kg/day doses of either pravastatin or rosuvastatin were administered to the treated diabetic rats for 8 weeks. At the end of the experiment, the body weights, fasting blood glucose levels, serum insulin levels, and insulin resistance, as well as the serum adiponectin, leptin, visfatin, and vaspin levels, were measured. Fasting blood glucose and insulin resistance levels were significantly higher, whereas insulin levels and body weight were significantly lower in the untreated diabetic group than in the control group. Diabetes caused significant decreases in adiponectin, leptin, and vaspin levels but a significant increase in visfatin levels. Pravastatin treatment significantly increased body weight and decreased fasting blood glucose levels, whereas rosuvastatin decreased body weight but did not affect fasting blood glucose levels. Pravastatin caused significant increases in both adiponectin and vaspin levels. However, rosuvastatin did not affect the adiponectin level but caused a significant decrease in the vaspin levels. Both pravastatin and rosuvastatin treatments decreased the leptin and visfatin levels. In conclusion, pravastatin is more effective at improving fasting blood glucose levels and body weight in diabetic rats, probably by increasing adiponectin and vaspin levels.

Relation between Serum Leptin, Lipid Profiles and other biomarkers levels in patients with type 2 diabetic nephropathy

Background: In advanced diabetes mellitus, serum levels of the most hormones are altered due to several interplaying mechanisms. Objective: To assess the relation of serum leptin and lipid profile in type 2 diabetic nephropathy. Patients and Method: Serum leptin levels and its relation to lipid profile were estimated in 62 patients with type 2 diabetic nephropathy attending the National Diabetes Center in Al- Mustansiriya University, and (26) healthy individuals considered as control group. The diabetic patients were classified into three groups, (24) pathients with normoalbuminuria (21) patients with microalbuminuria and (17) patients with macroalbuminuria. Fasting plasma glucose, serum creatinine, Hb A1c %, lipid profile (Total cholesterol, LDL- Cholesterol, HDL- Cholesterol and Triglyceride) and urinary albumin, were measured to establish the possibility of using these biomarkers as a supplementary to serum leptin to be a diagnostic test for type 2 diabetic nephropathy. Results: Serum leptin levels showed a significant elevation in microalbuminuria (20.08± 4.50 ng/ml) and macroalbuminuria groups (22.35± 6.89 ng/ml) as compared to nondiabetic normal control group (10.64 ± 3.17 ng/ml). There was no significant differences observed in serum leptin levels between the normoalbuminuria group (13.96 ± 5.73 ng/ml) and healthy controls, but a significant positive differences were noticed in the levels of fasting plasma glucose, serum creatinine, Hb A1c% and lipid profile in the three patient groups in comparison with the control group. While no significant correlation was observed between these biomarkers levels and serum leptin values. Conclusion: It might be concluded that serum leptin levels were elevated in type 2 diabetic patients with microalbuminuria and macroalbuminuria, suggesting that renal leptin degradation is impaired in early stage of kidney damage and this impairment increase with the progression of this disease. Leptin hormone may consider according to these results as a risk factor for progression of kidney disease in diabetic patients.

7380 Qualitative Interviews Describing the Patient Experience of Individuals with Generalized Lipodystrophy Enrolled in a Clinical Trial of Mibavademab

Abstract Disclosure: S. Martin: Other; Self; Employee of RTI Health Solutions, an independent nonprofit research organization retained by Regeneron Pharmaceuticals, Inc. to conduct this research. Compensis unconnected to the studies they work on. K. Kosa: Other; Self; Employee of RTI Health Solutions, an independent nonprofit research organization retained by Regeneron Pharmaceuticals, Inc. to conduct this research. Compensis unconnected to the studies they work on. S. Podgrabinska: Employee; Self; Regeneron Pharmaceuticals. Stock Owner; Self; Regeneron Pharmaceuticals. A. Garg: Consulting Fee; Self; Aegerion Pharmaceuticals, Regeneron Pharmaceuticals, Third Rock ventures, Kyttaro, Cello Health, Health Advances. Grant Recipient; Self; Aegerion Pharmaceuticals, Pfizer, Inc., Regeneron Pharmaceuticals, Amryt, Ionis Pharmaceuticals Inc. E.A. Oral: Consulting Fee; Self; Regeneron Pharmaceuticals, Third Rock Ventures, Rejuvenate Inc. Grant Recipient; Self; Regeneron Pharmaceuticals, Amryt Pharmaceuticals, Ionis Pharmaceuticals Inc., Gemphire Therapeutics. Other; Self; Amryt Pharmaceuticals, Novo Nordisk, Rhythm Pharmaceuticals, Fractyl Laboratories, GI Dynamics. I. Yildirim Simsir: None. R.J. Brown: Other; Self; Regeneron Pharmaceuticals. S. Ozen: None. O. Pagovich: Employee; Self; Regeneron Pharmaceuticals. Stock Owner; Self; Regeneron Pharmaceuticals. D. Srinivasan: Employee; Self; Regeneron Pharmaceuticals. Stock Owner; Self; Regeneron Pharmaceuticals. R.J. Sanchez: Employee; Self; Regeneron Pharmaceuticals. Stock Owner; Self; Regeneron Pharmaceuticals. Background: Generalized lipodystrophy (GLD) is characterized by near-total lack of adipose tissue and, consequently, low levels of serum leptin. Mibavademab (REGN4461) is an investigational human monoclonal agonist antibody of the leptin receptor. As part of the phase 2, randomized, double-blind, placebo-controlled study (NCT04159415) of mibavademab, we conducted exit interviews to gather patient experience data specific to GLD and changes experienced during the study. Methods: Between week 52-54, experienced interviewers conducted 45-minute in-depth, semi structured, qualitative phone interviews to understand their GLD-related symptoms/signs, perceptions of any improvements experienced during the study as well as the importance of these improvements. Results: Interviews were conducted with 5 females and 2 males, with a mean age of 19.4 (range:15-23). Most participants reported experiencing hunger-related symptoms (n=6), pain, extreme body temperature sensations (n=5 for each), and fatigue or sleep problems (n=4 for each) prior to them starting the study. While we were interested in symptoms, many participants also reported clinical signs, such as enlarged/fatty liver and hyperglycemia (n=5 for each). Pain was most frequently reported as the most bothersome symptom (n=3) prior to the study. All participants who reported having hunger, pain, extreme body temperatures, hyperglycemia, and fatigue before the study reported improvements after 52 weeks of treatment. Participants generally indicated more than a minimal amount of change. For example, of the 5 participants who reported hunger as a symptom prior to the study and who were asked about the amount of change, all reported either “some” (n=1) or “a lot” of improvement (n=4). Participants, overall, rated each improvement, except body temperature as “very important.” Improvements in extreme body temperature were generally rated by participants as “somewhat important.” When asked which of the reported improvements were most important, changes in hyperglycemia was most frequently reported (n=4) followed by improvements in enlarged or fatty liver (n=2) and pain and hunger (n=1 each). All participants reported they were satisfied (n=2) or very satisfied (n=5) with the study treatment. Conclusions: All participants who reported symptoms of hunger, pain, fatigue, and extreme body temperature, or the clinical biomarker of hyperglycemia before entering the study reported improvements in each of these after treatment. In addition, all participants reported being either satisfied or very satisfied with treatment. This qualitative research provides insight into the patient experience for individuals with GLD and provides an opportunity to further understand and complement the clinical trial results. Presentation: 6/1/2024

Study of the relationship between thyroid autoimmunity, obesity and serum leptin level in a sample of Egyptian individuals

Obesity is a worldwide health problem, and its prevalence is increasing steadily all over the globe. Leptin, mainly produced by adipocytes, was identified to modulate the immune system, as well as contributing to increased production of thyroid peroxidase antibodies (TPO-Ab) and thyroglobulin antibody (TG-Ab). Autoimmune thyroiditis, mainly Hashimoto's thyroiditis, is believed to be the main cause of hypothyroidism in iodine sufficient regions, (TPO-Ab) and (TG-Ab) are the hallmarks of this disease. This study aimed to assess the relationship between thyroid autoimmunity, obesity and serum leptin level in a sample of Egyptian individuals. This study was a case control study which included 60 participants, recruited from the outpatient of the Internal Medicine Clinic at Ain Shams University Hospitals, during the period from February 2022 to October 2022. They were divided into two groups: Group 1 included 30 participants, have Residual hematopoiesis is an important prognostic factor of immunosuppressive therapy in severe aplastic anemia (BMI) &gt;30 kg/m2, and Group 2 included 30 participants, have BMI (18.5-25 kg/m2). We detected serum leptin, thyroid profile and thyroid antibodies using the enzyme linked immunosorbent assay and other immunoassays. Serum levels of leptin, thyroid-stimulating hormone (TSH) and glycated hemoglobin (HbA1c) were statistically significantly higher in group 1 than in group 2 (p=0.0001 for all). Also, there was a statistically significant positive correlation between leptin level and Anti-TPO in group 1 (p=0.002). In addition, in group 1, there was a statistically significant positive correlation between serum leptin level and TSH (p=0.0001). In conclusion, there is a relationship between thyroid autoimmunity and serum leptin level in obese subjects.

Assessment of salivary and serum leptin in tobacco smokers and oral squamous cell carcinoma-A case-control study

ObjectivesOral squamous cell carcinoma (OSCC) is the most common head and neck malignancy and tobacco-related cancers account for a significant portion of all oral cancers. Cancer patients often suffer from cachexia, which contributes significantly to mortality. Leptin is a protein released by adipocytes identified to play an important role in obesity and inflammation. The present study aimed to quantify and compare salivary and serum leptin in tobacco smokers and OSCC. Materials and MethodsThe present prospective case-control study enrolled 42 subjects divided equally among OSCC and tobacco smokers without oral lesions (TS). Both saliva and blood were collected from each subject and leptin levels were determined using enzyme-linked immunosorbent assay. The data obtained were analysed using Mann Whitney U, Kruskal Wallis, Friedman, and Spearman correlation tests (p < 0.05). ResultsA significant reduction in both salivary and serum leptin levels in OSCC was observed (p < 0.001, 0.002 respectively). In addition, significant reductions in weight and body mass index were also observed during follow-ups at 3, 6, and 9 months (p < 0.001 for both). ConclusionsReduced salivary and serum leptin levels in OSCC proved that it is an important diagnostic marker, with non-invasive saliva measurement being more patient-friendly. Future multicentric studies with higher samples in OSCC subgroups are warranted. Clinical RelevanceLeptin reduction in oral squamous cell carcinoma proved to be an important diagnostic marker. Non-invasive salivary techniques could be employed in mass screening programmes. The significant correlation between leptin and BMI also shed insight into the overall well-being of the patient.

Association between some Serum Parameters in Iraqi Women with Polycystic Ovary Syndrome and leptin receptor gene polymorphism

Polycystic ovarian syndrome (PCOS) is considered as a complex, heterogeneous disorder that impacts 5-10% of women at reproductive age. This study aimed to evaluate the association of leptin recepter gene polymorphism (Lys109Arg, rs1137100) and some serum parameters with PCOS in of Iraqi women. This case-control study was carried out during the period from July to October, 2022 at Infertility Care and IVF center of Kamal AL-Samaraay Hospital, Baghdad. The study included 120 Iraqi women as a sample size divided into two groups 60 PCOS patients and 60 apparently healthy control. PCOS patients were diagnosed by gynecologists according to Rotterdam criteria. The genotypes of leptin receptor gene at rs137100 SNP were determined by using HRM-PCR. The serum levels of leptin, soluble leptin receptor (sOB-R) and AMH were measured by using Elisa kits. Lipid profile parameters were measured by spin 200 full auto. LH, FSH, testosterone, estradiol, progesterone, TSH, T3 and T4 hormones were measured by cobas E411. Results revealed that BMI values were significantly increased (p≤0.01) in PCOS patients compared to controls (30.21±0.70 versus 24.28±0.617). Serum leptin and sOB-R levels were significantly (p˂0.05) higher in PCOS patients than controls (4303.28±71.55 versus 3854.84 ±213.96 pg /ml and 144.09 ±5.51 versus 122.16 ±7.64 ng/ml respectively). The frequency of AA genotypes was significantly (p˂0.05) lower in PCOS patients than in apparently healthy subjects (33.3 % versus 65.0% respectively) whereas the frequencies of AG and GG genotypes were significantly (p˂0.05) higher in PCOS patients versus controls (53.3% versus 26.6% and 13.4% versus 8.4% respectively).The A allele frequency was higher in apparently healthy subjects than in PCOS women (78.3% versus 60.0% respectively) while G allele frequency was significantly higher in PCOS patients versus controls (80.0% versus 21.7%, respectively). It was concluded that the leptin receptor polymorphism (rs1137100) is strongly linked to an increased risk of developing PCOS. Further, those with the A allele are less likely to develop PCOS.

CXCL10 predicts autoimmune features and a favorable clinical course in patients with IIP: post hoc analysis of a prospective and multicenter cohort study

BackgroundInterstitial pneumonia with autoimmune features (IPAF), which does not meet any of the criteria for connective tissue diseases (CTD), has been attracting an attention in patients with idiopathic interstitial pneumonia (IIP). However, the biomarkers that reflect the clinical course of these patients have not been fully elucidated.ObjectiveTo identify useful serum biomarkers reflecting CTD-related features and favorable prognoses in patients with IIP.MethodsThis was a post hoc analysis of a prospective and multicenter cohort study between 2015 and 2020. Newly diagnosed patients with IIP were consecutively enrolled, and 74 autoimmune features and autoantibodies were comprehensively checked during IIP diagnosis. Serum levels of CXCL10, CXCL1, CCL2, BAFF, angiopoietin-2, and leptin were evaluated at the time of IIP diagnosis.ResultsTwo hundred twenty-two patients (159 men and 63 women) with IIP were enrolled. The median observation duration was 36 months. The median age was 71 years old, and median %forced vital capacity (FVC) was 84.1% at the time of IIP diagnosis. The proportion of patients who met the classification criteria for IPAF was 11.7%. In patients with high serum CXCL10, changes in both %FVC and %diffusion lung capacity for carbon monoxide at one year were significantly higher than those in patients with low CXCL10 (p = 0.014 and p = 0.009, respectively), whereas these changes were not significant for other chemokines and cytokines. High CXCL10 levels were associated with acute/subacute onset (p < 0.001) and the diagnosis of nonspecific interstitial pneumonia with organizing pneumonia overlap (p = 0.003). High CXCL10 levels were related to a higher classification of IPAF (relative risk for IPAF was 3.320, 95%CI: 1.571–7.019, p = 0.003) and lower classification of progressive pulmonary fibrosis (PPF; relative risk for PPF was 0.309, 95%CI: 0.100-0.953, p = 0.027) compared to those with low CXCL10. Finally, survival was higher in patients with IPF and high CXCL10 (p = 0.044), and high CXCL10 was a significant prognostic factor in multivariate Cox proportional hazards models (hazard ratio 0.368, p = 0.005).ConclusionsHigh serum levels of CXCL10 are associated with CTD-related features, the favorable clinical course, and survival in patients with IIP, especially IPF.Clinical trial numberNot applicable.