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Seetharaman J, Srivastava A, Yadav RR, Singh SK, Mishra P, Sen Sarma M, Poddar U. Visceral Fat Indices: Do They Help Differentiate Crohn's Disease and Intestinal Tuberculosis in Children? J Crohns Colitis 2023; 17:2026-2032. [PMID: 37390314 DOI: 10.1093/ecco-jcc/jjad109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/19/2023] [Indexed: 07/02/2023]
Abstract
BACKGROUND AND AIMS Crohn's disease [CD] and intestinal tuberculosis [ITB] are often difficult to differentiate. Mesenteric fat hypertrophy is a feature of CD. We evaluated the utility of fat indices (visceral fat [VF] and subcutaneous fat [SF]) in differentiating CD and ITB in children. METHODS Symptomatic children diagnosed to have CD or ITB based on recommended criteria were enrolled. Clinical, anthropometric, and laboratory details were noted. Abdominal fat was measured on computed tomography in supine position at the level of L4 vertebrae. VF and SF area was measured separately by a radiologist, blinded to the diagnosis. The sum of VF and SF was taken as total fat [TF]. VF/SF and VF/TF ratios were calculated. RESULTS Thirty-four (age 14 years [10.8-17.0], 14 boys) children were recruited: 12 had CD [seven boys, age 13.0 years] and 22 had ITB [seven boys, age 14.5 years]. VF area was higher in CD compared to ITB (18.34 cm2 [15.62-40.01] vs 6.48 cm2 [2.65-21.96]; p = 0.012). The SF and TF area was similar in ITB and CD. The ratios of VF/SF (0.82 [0.57-1.5] vs 0.33 [0.16-0.48]; p = 0.004) and VF/TF (0.45 [0.36-0.60] vs 0.25 [0.13-0.32]; p = 0.004) were significantly higher in CD. On comparing CD and ITB in boys and girls separately, the difference was significant for boys but not for girls. A VF/SF ratio of 0.609 predicted CD with a good sensitivity [75%] and specificity [86.4%] [area under the curve 0.795, 95% confidence interval 0.636-0.955; p = 0.005]. CONCLUSION The VF/SF ratio is a simple, non-invasive, objective parameter to differentiate CD and ITB in children, particularly boys. Larger studies are needed to validate this in girls.
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Affiliation(s)
- Jayendra Seetharaman
- Department of Paediatric Gastroenterology, Sanjay Gandhi Post-graduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India
| | - Anshu Srivastava
- Department of Paediatric Gastroenterology, Sanjay Gandhi Post-graduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India
| | - Rajanikant R Yadav
- Department of Radiodiagnosis, Sanjay Gandhi Post-graduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India
| | - Sumit K Singh
- Department of Paediatric Gastroenterology, Sanjay Gandhi Post-graduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India
| | - Prabhakar Mishra
- Department of Biostatistics, Sanjay Gandhi Post-graduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India
| | - Moinak Sen Sarma
- Department of Paediatric Gastroenterology, Sanjay Gandhi Post-graduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India
| | - Ujjal Poddar
- Department of Paediatric Gastroenterology, Sanjay Gandhi Post-graduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India
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Gu P, Dube S, McGovern DPB. Medical and Surgical Implications of Mesenteric Adipose Tissue in Crohn's Disease: A Review of the Literature. Inflamm Bowel Dis 2023; 29:458-469. [PMID: 35731568 DOI: 10.1093/ibd/izac120] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Indexed: 12/09/2022]
Abstract
Mesenteric adipose tissue (MAT) has gained substantial attention as an active player in Crohn's disease (CD), but its clinical significance is poorly understood and likely reflects, in part, difficulties assessing MAT noninvasively. Recent radiologic studies have identified candidate surrogate markers that may reflect inflammatory alterations of MAT in CD and have found that certain features including visceral adipose tissue may inform risk of complicated disease behavior, risk for surgery, and postoperative outcomes. Additionally, emerging surgical data have suggested MAT may even be a therapeutic target to mitigate postoperative recurrence of CD. However, the current studies have variable results, reduced sample sizes, and methodological limitations that preclude incorporating the radiologic and surgical findings into clinical practice. Nonetheless, the results are promising and potentially have important implications for the medical and surgical management of CD, which merits that additional studies are warranted. Thus, we have reviewed the available literature on the medical and surgical implications of MAT in CD to summarize our current understanding and identify gaps in knowledge to inform future investigations.
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Affiliation(s)
- Phillip Gu
- Karsh Division of Gastroenterology, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Shishir Dube
- Karsh Division of Gastroenterology, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Dermot P B McGovern
- Karsh Division of Gastroenterology, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA, USA
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Gu P, Luo J, Kim J, Paul P, Limketkai B, Sauk JS, Park S, Parekh N, Zheng K, Rudrapatna V, Syal G, Ha C, McGovern DP, Melmed GY, Fleshner P, Eisenstein S, Ramamoorthy S, Dulai PS, Boland BS, Grunvald E, Mahadevan U, Ohno-Machado L, Sandborn WJ, Singh S. Effect of Obesity on Risk of Hospitalization, Surgery, and Serious Infection in Biologic-Treated Patients With Inflammatory Bowel Diseases: A CA-IBD Cohort Study. Am J Gastroenterol 2022; 117:1639-1647. [PMID: 35973139 DOI: 10.14309/ajg.0000000000001855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2022] [Accepted: 04/22/2022] [Indexed: 12/11/2022]
Abstract
INTRODUCTION Obesity is variably associated with treatment response in biologic-treated patients with inflammatory bowel diseases (IBD). We evaluated the association between obesity and risk of hospitalization, surgery, or serious infections in patients with IBD in new users of biologic agents in a large, multicenter, electronic health record (EHR)-based cohort (CA-IBD). METHODS We created an EHR-based cohort of adult patients with IBD who were new users of biologic agents (tumor necrosis factor [TNF-α] antagonists, ustekinumab, and vedolizumab) between January 1, 2010, and June 30, 2017, from 5 health systems in California. Patients were classified as those with normal body mass index (BMI), overweight, or obese based on the World Health Organization classification. We compared the risk of all-cause hospitalization, IBD-related surgery, or serious infections among patients with obesity vs those overweight vs those with normal BMI, using Cox proportional hazard analyses, adjusting for baseline demographic, disease, and treatment characteristics. RESULTS Of 3,038 biologic-treated patients with IBD (69% with Crohn's disease and 76% on TNF-α antagonists), 28.2% (n = 858) were overweight, and 13.7% (n = 416) were obese. On a follow-up after biologic initiation, obesity was not associated with an increased risk of hospitalization (adjusted hazard ratio [aHR] vs normal BMI, 0.90; [95% confidence interval, 0.72-1.13]); IBD-related surgery (aHR, 0.62 [0.31-1.22]); or serious infection (aHR, 1.11 [0.73-1.71]). Similar results were observed on stratified analysis by disease phenotype (Crohn's disease vs ulcerative colitis) and index biologic therapy (TNF-α antagonists vs non-TNF-α antagonists). DISCUSSION In a multicenter, EHR-based cohort of biologic-treated patients with IBD, obesity was not associated with hospitalization, surgery, or serious infections. Further studies examining the effect of visceral obesity on patient-reported and endoscopic outcomes are needed.
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Affiliation(s)
- Phillip Gu
- Karsh Division of Gastroenterology and Hepatology, Department of Medicine, Cedars-Sinai Medical System, Los Angeles, California, USA
| | - Jiyu Luo
- Division of Biostatistics and Bioinformatics, Department of Family Medicine and Public Health, UC San Diego, La Jolla, California, USA
| | - Jihoon Kim
- Division of Biomedical Informatics, Department of Medicine, UC San Diego, La Jolla, California, USA
| | - Paulina Paul
- Division of Biomedical Informatics, Department of Medicine, UC San Diego, La Jolla, California, USA
| | - Berkeley Limketkai
- Vatche and Tamar Manoukian Division of Digestive Diseases, Department of Medicine, UC Los Angeles, Los Angeles, California, USA
| | - Jenny S Sauk
- Vatche and Tamar Manoukian Division of Digestive Diseases, Department of Medicine, UC Los Angeles, Los Angeles, California, USA
| | - Sunhee Park
- Division of Gastroenterology, Department of Medicine, UC Irvine, Orange, California, USA
| | - Nimisha Parekh
- Division of Gastroenterology, Department of Medicine, UC Irvine, Orange, California, USA
| | - Kai Zheng
- Department of Informatics, Donald Bren School of Information and Computer Sciences, UC Irvine, Orange, California, USA
| | - Vivek Rudrapatna
- Division of Gastroenterology, Department of Medicine, UC San Francisco, California, USA
| | - Gaurav Syal
- Karsh Division of Gastroenterology and Hepatology, Department of Medicine, Cedars-Sinai Medical System, Los Angeles, California, USA
| | - Christina Ha
- Karsh Division of Gastroenterology and Hepatology, Department of Medicine, Cedars-Sinai Medical System, Los Angeles, California, USA
| | - Dermot P McGovern
- Karsh Division of Gastroenterology and Hepatology, Department of Medicine, Cedars-Sinai Medical System, Los Angeles, California, USA
| | - Gil Y Melmed
- Karsh Division of Gastroenterology and Hepatology, Department of Medicine, Cedars-Sinai Medical System, Los Angeles, California, USA
| | - Phillip Fleshner
- Division of Colorectal Surgery, Department of Surgery, Cedars-Sinai Medical System, Los Angeles, California, USA
| | - Samuel Eisenstein
- Division of Colon and Rectal Surgery, Department of Surgery, UC San Diego, La Jolla, California, USA
| | - Sonia Ramamoorthy
- Division of Colon and Rectal Surgery, Department of Surgery, UC San Diego, La Jolla, California, USA
| | - Parambir S Dulai
- Division of Gastroenterology, Department of Medicine, UC San Diego, La Jolla, California, USA
| | - Brigid S Boland
- Division of Gastroenterology, Department of Medicine, UC San Diego, La Jolla, California, USA
| | - Eduardo Grunvald
- Division of General Internal Medicine, Department of Medicine, UC San Diego, La Jolla, California, USA
| | - Uma Mahadevan
- Division of Gastroenterology, Department of Medicine, UC San Francisco, California, USA
| | - Lucila Ohno-Machado
- Division of Biomedical Informatics, Department of Medicine, UC San Diego, La Jolla, California, USA
| | - William J Sandborn
- Division of Gastroenterology, Department of Medicine, UC San Diego, La Jolla, California, USA
| | - Siddharth Singh
- Division of Biomedical Informatics, Department of Medicine, UC San Diego, La Jolla, California, USA
- Division of Gastroenterology, Department of Medicine, UC San Diego, La Jolla, California, USA
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Michalak A, Kasztelan-Szczerbińska B, Cichoż-Lach H. Impact of Obesity on the Course of Management of Inflammatory Bowel Disease—A Review. Nutrients 2022; 14:nu14193983. [PMID: 36235636 PMCID: PMC9573343 DOI: 10.3390/nu14193983] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 09/16/2022] [Accepted: 09/19/2022] [Indexed: 11/16/2022] Open
Abstract
It is already well-known that visceral adipose tissue is inseparably related to the pathogenesis, activity, and general outcome of inflammatory bowel disease (IBD). We are getting closer and closer to the molecular background of this loop, finding certain relationships between activated mesenteric tissue and inflammation within the lumen of the gastrointestinal tract. Recently, relatively new data have been uncovered, indicating a direct impact of body fat on the pattern of pharmacological treatment in the course of IBD. On the other hand, ileal and colonic types of Crohn’s disease and ulcerative colitis appear to be more diversified than it was thought in the past. However, the question arises whether at this stage we are able to translate this knowledge into the practical management of IBD patients or we are still exploring the scientific background of this pathology, having no specific tools to be used directly in patients. Our review explores IBD in the context of obesity and associated disorders, focusing on adipokines, creeping fat, and possible relationships between these disorders and the treatment of IBD patients.
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Gu P, Chhabra A, Chittajallu P, Chang C, Mendez D, Gilman A, Fudman DI, Xi Y, Feagins LA. Visceral Adipose Tissue Volumetrics Inform Odds of Treatment Response and Risk of Subsequent Surgery in IBD Patients Starting Antitumor Necrosis Factor Therapy. Inflamm Bowel Dis 2022; 28:657-666. [PMID: 34291800 DOI: 10.1093/ibd/izab167] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Indexed: 12/12/2022]
Abstract
BACKGROUND Data describing the effect of obesity on antitumor necrosis factor (anti-TNF) treatment response are inconsistent. Visceral adipose tissue (VAT) is a superior marker of adiposity to body mass index. However, its effect on treatment response is unclear. We aimed to evaluate the effect of VAT on anti-TNF treatment response. METHODS Inflammatory bowel disease (IBD) patients starting anti-TNF agents between January 1, 2009, and July 31, 2019, were included. 3-dimensional measurements of VAT volume and visceral fat index (visceral:subcutaneous adipose tissue ratio; VFI) were obtained from computed tomography (CT) scans. Subjects were categorized by predefined volume cutoffs (<1500cm3, 1500-2999cm3, ≥3000cm3) and VFI (<0.33, 0.33-0.66, ≥0.67). Primary outcomes included a composite treatment response end point at 6 and 12 months. Secondary outcomes were surgery at 6 and 12 months. Multivariable logistic regression was used to calculate adjusted odds ratio (aOR) and 95% confidence interval (CI). RESULTS The final cohort included 176 patients. No significant differences in treatment response at 6 months was observed. At 12 months, compared with volume <1500cm3, patients with volume 1500-2999cm3 had higher odds of response (aOR, 3.52; 95% CI, 1.16-10.71; P = .023), whereas volume ≥3000cm3 did not. Compared with VFI<0.33, VFI ≥0.67 had higher odds of surgery at 6 (aOR, 48.22; 95% CI, 4.73-491.57; P = .023) and 12 months (aOR, 20.94; 95% CI, 3.14-139.67; P = .004). Post hoc analysis suggested VAT may affect drug pharmacokinetics. CONCLUSIONS We found VAT volume is associated with anti-TNF treatment response in a nondose dependent manner, and VFI may inform risk of surgery after anti-TNF initiation. If confirmed by prospective studies, VAT volumetrics are potentially useful biomarkers to inform IBD treatment decisions.
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Affiliation(s)
- Phillip Gu
- Division of Digestive and Liver Diseases, UT Southwestern, Dallas,TX, USA.,Department of Internal Medicine, UT Southwestern, Dallas,TX, USA
| | - Avneesh Chhabra
- Division of Musculoskeletal Radiology, Department of Radiology, UT Southwestern, Dallas,TX, USA
| | | | | | - Denisse Mendez
- Department of Internal Medicine, UT Southwestern, Dallas,TX, USA
| | - Andrew Gilman
- Division of Digestive and Liver Diseases, UT Southwestern, Dallas,TX, USA.,Department of Internal Medicine, UT Southwestern, Dallas,TX, USA
| | - David I Fudman
- Division of Digestive and Liver Diseases, UT Southwestern, Dallas,TX, USA.,Department of Internal Medicine, UT Southwestern, Dallas,TX, USA
| | - Yin Xi
- Division of Musculoskeletal Radiology, Department of Radiology, UT Southwestern, Dallas,TX, USA.,Department of Population and Data Sciences, UT Southwestern, Dallas,TX, USA
| | - Linda A Feagins
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Texas at Austin Dell Medical School, Austin,TX, USA
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Chiplunker AJ, Chen L, Levin MS, Warner BW, Davidson NO, Rubin DC. Increased Adiposity and Reduced Lean Body Mass in Patients with Short Bowel Syndrome. Dig Dis Sci 2020; 65:3271-3279. [PMID: 31907775 PMCID: PMC7924810 DOI: 10.1007/s10620-019-06032-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Accepted: 12/24/2019] [Indexed: 01/25/2023]
Abstract
BACKGROUND Few studies have examined the metabolic consequences of short bowel syndrome (SBS) and its effects on body composition in adults. We hypothesized that body composition of SBS patients is altered compared to a normal age-, race-, and sex-matched population, regardless of parenteral nutrition (PN) dependence. AIM To compare the body composition of adult patients with SBS to age-, sex-, and race-matched healthy controls. METHODS Twenty patients with SBS underwent body composition analysis using the GE Lunar iDXA scanner. Patients were age-, sex-, and race-matched to controls from the National Health and Nutrition Examination Survey (1999-2004). Mean differences in body mass index, fat-free mass, fat mass, percent body fat, visceral adipose tissue mass and volume, and bone mineral density were measured. Statistical analysis was performed using SAS 9.4 software. RESULTS Fifty-five percent of subjects had a history of PN use, and 30% were current PN users. Mean percent body fat for SBS patients was 35.1% compared to 30.9% for healthy controls (p = 0.043). Fat-free mass was reduced in SBS (p = 0.007). Patients with reduced bone mass had a trend toward significantly more years of PN exposure compared to those with normal bone mass (p = 0.094), and a trend toward older age (p = 0.075). CONCLUSIONS SBS is associated with increased percent body fat and reduced fat-free mass, suggesting that improved dietary and therapeutic interventions are needed to restore normal metabolic indices and avoid risk of metabolic syndrome in SBS patients.
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Affiliation(s)
- Adeeti J. Chiplunker
- Department of Medicine, Division of Gastroenterology, Washington University in St. Louis School of Medicine
| | - Ling Chen
- Division of Biostatistics, Washington University in St. Louis School of Medicine
| | - Marc S. Levin
- Department of Medicine, Division of Gastroenterology, Washington University in St. Louis School of Medicine.,VA St. Louis Health Care System, Washington University in St. Louis School of Medicine
| | - Brad W. Warner
- Division of Pediatric Surgery St. Louis Children’s Hospital, Washington University in St. Louis School of Medicine
| | - Nicholas O. Davidson
- Department of Medicine, Division of Gastroenterology, Washington University in St. Louis School of Medicine.,Department of Developmental Biology; Washington University in St. Louis School of Medicine
| | - Deborah C. Rubin
- Department of Medicine, Division of Gastroenterology, Washington University in St. Louis School of Medicine.,Department of Developmental Biology; Washington University in St. Louis School of Medicine
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Kurowski JA, Achkar JP, Gupta R, Barbur I, Bonfield TL, Worley S, Remer EM, Fiocchi C, Viswanath SE, Kay MH. Adipokine Resistin Levels at Time of Pediatric Crohn Disease Diagnosis Predict Escalation to Biologic Therapy. Inflamm Bowel Dis 2020; 27:1088-1095. [PMID: 32978938 PMCID: PMC8355503 DOI: 10.1093/ibd/izaa250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Indexed: 12/09/2022]
Abstract
BACKGROUND Hypertrophy of visceral adipose tissue (VAT) is a hallmark of Crohn disease (CD). The VAT produces a wide range of adipokines, biologically active factors that contribute to metabolic disorders in addition to CD pathogenesis. The study aim was to concomitantly evaluate serum adipokine profiles and VAT volumes as predictors of disease outcomes and treatment course in newly diagnosed pediatric patients with CD. METHODS Pediatric patients ages 6 to 20 years were enrolled, and their clinical data and anthropometric measurements were obtained. Adipokine levels were measured at 0, 6, and 12 months after CD diagnosis and baseline in control patients (CP). The VAT volumes were measured by magnetic resonance imaging or computed tomography imaging within 3 months of diagnosis. RESULTS One hundred four patients undergoing colonoscopy were prospectively enrolled: 36 diagnosed with CD and 68 CP. The serum adipokine resistin and plasminogen activator inhibitor (PAI)-1 levels were significantly higher in patients with CD at diagnosis than in CP. The VAT volume was similar between CD and CP. Baseline resistin levels at the time of diagnosis in patients with CD who were escalated to biologics was significantly higher than in those not treated using biologic therapy by 12 months (29.8 ng/mL vs 13.8 ng/mL; P = 0.004). A resistin level of ≥29.8 ng/mL at the time of diagnosis predicted escalation to biologic therapy in the first year after diagnosis with a specificity of 95% (sensitivity = 53%; area under the curve = 0.82; P = 0.015 for model with log-scale). There was a significantly greater reduction in resistin (P = 0.002) and PAI-1 (P = 0.010) at the 12-month follow-up in patients on biologics compared with patients who were not treated using biologics. CONCLUSIONS Serum resistin levels at diagnosis of pediatric CD predict the escalation to biologic therapy at 12 months, independent of VAT volumes. Resistin and PAI-1 levels significantly improved in patients with CD after treatment using biologics compared with those not on biologics. These results suggest the utility of resistin as a predictive biomarker in pediatric CD.
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Affiliation(s)
- Jacob A Kurowski
- Pediatric Gastroenterology, Hepatology, and Nutrition, Cleveland Clinic, Cleveland, Ohio, United States,Address correspondence to: Jacob A. Kurowski, MD, Cleveland Clinic, Pediatric Gastroenterology, Hepatology, and Nutrition, 9500 Euclid Avenue, Desk R3, Cleveland, OH 44195 ()
| | - Jean-Paul Achkar
- Gastroenterology, Hepatology, and Nutrition, Cleveland Clinic, Cleveland, Ohio, United States
| | - Rishi Gupta
- Pediatric Gastroenterology, University of Rochester, Rochester, New York, United States
| | - Iulia Barbur
- Biomedical Engineering, Case Western Reserve University, Cleveland, Ohio, United States
| | - Tracey L Bonfield
- Pediatrics, Case Western Reserve University, Cleveland, Ohio, United States
| | - Sarah Worley
- Quantitative Health Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States
| | - Erick M Remer
- Imaging Institute, Cleveland Clinic, Cleveland, Ohio, United States
| | - Claudio Fiocchi
- Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States
| | - Satish E Viswanath
- Biomedical Engineering, Case Western Reserve University, Cleveland, Ohio, United States
| | - Marsha H Kay
- Pediatric Gastroenterology, Hepatology, and Nutrition, Cleveland Clinic, Cleveland, Ohio, United States
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Magnetic resonance imaging assessment of body composition parameters in Crohn's disease. Dig Liver Dis 2020; 52:878-884. [PMID: 32622612 DOI: 10.1016/j.dld.2020.06.024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Revised: 05/27/2020] [Accepted: 06/08/2020] [Indexed: 12/11/2022]
Abstract
BACKGROUND Body composition, currently evaluated by computed tomography scan, is related to poor evolution and severity of Crohn's disease (CD). Few MRI studies have been performed, yet it is the most commonly used imaging modality for the surveillance of the disease. AIM Evaluate the feasibility of MRI body composition measurement and compare the variation according to the activity of the disease. METHODS A cohort of 132 consecutive patients was studied. The visceral adiposity index (VAI), subcutaneous adiposity index (SAI) and skeletal muscle index (SMI) were measured. Patients were divided into 2 groups according to disease activity. Sarcopenic status was defined according to the cut off value (SMI < 38.9 cm2/m2 in women and < 54.4 cm2/m2 in men). RESULTS MRI measurements of body composition parameters were feasible and reproducible. After adjustment, sarcopenia was more common (2.07 [1.02; 4.27], p = 0.046), and the SMI (-4.90 [-9.36; -0.431], p = 0.032) was lower in active disease. The SAI was lower (-14.7 [-29.8; 0.258], p = 0.054) in active disease. The VAI tended to be higher with active disease (3.91 [-3.50; 11.9], p = 0.34), and the VAI/SAI+VAI ratio was higher (9.40 [4.72; 14.1], p<0.001). CONCLUSION Assessment of body composition is feasible and reproducible in routine MR and parameters are related to disease activity.
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The Role of Adipose Tissue in the Pathogenesis and Therapeutic Outcomes of Inflammatory Bowel Disease. Cells 2019; 8:cells8060628. [PMID: 31234447 PMCID: PMC6627060 DOI: 10.3390/cells8060628] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 06/16/2019] [Accepted: 06/18/2019] [Indexed: 02/06/2023] Open
Abstract
Though historically regarded as an inert energy store, adipose tissue is a complex endocrine organ, which is increasingly implicated in the pathogenesis of inflammatory bowel disease (IBD). Accumulating evidence points to visceral adipose tissue and specifically to its mesenteric component, or “creeping fat” as impacting on the disease course through its immunomodulatory properties. On the one hand, mesenteric fat acts as a physical barrier to inflammation and is involved in controlling host immune response to translocation of gut bacteria. On the other hand, however, there exists a strong link between visceral fat and complicated course of the disease with unfavorable therapeutic outcomes. Furthermore, “creeping fat” appears to play different roles in different IBD phenotypes, with the greatest pathogenetic contribution probably to an ileal form of Crohn’s disease. In this review, we summarize and discuss the existing literature on the subject and identify high-priority areas for future research. It may be that a better understanding of the role of mesenteric fat in IBD will determine new therapeutic targets and translate into improved clinical outcomes.
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Abstract
OBJECTIVES The inflammatory process in Crohn disease (CD) involves the visceral fat, characterized by adipocyte hyperplasia and altered adipose tissue and serum concentrations of tumor necrosis factor (TNF), leptin, adiponectin and resistin. We investigated the effect of anti-TNF therapy with infliximab (IFX) on serum adipokine levels in pediatric CD. METHODS Serum concentrations of resistin (ng/mL), leptin (ng/mL), and total adiponectin (μg/mL) were assessed by enzyme-linked immunosorbent assays (ELISA) in 18 pediatric CD patients (mean age 15.0 ± 1.5 years) before first, second, and fourth IFX infusion (weeks 0, 2, and 14) and compared with baseline values from sex- and BMI-matched healthy controls (HC, mean age 13.4 ± 1.6 years). RESULTS At baseline, CD patients (mean age 15.0 ± 1.5 years, 10 of 18 boys) compared with HC (13.4 ± 1.6 years, 7 of 15 boys) had higher resistin levels (median 14.7 ng/mL, range 5.1-50.5 vs 7.3 ng/mL, 0.5-14.5); P = 0.0002). At weeks 2 and 14, resistin decreased to 6.9 ng/mL (2.9-16.8) (P < 0.0001) and 9.2 ng/mL (4.1-20.6; P = 0.0011), respectively. Leptin and adiponectin were comparable between patients and HC at baseline. Leptin increased in girls from 9.5 ng/mL (4.0-30.1) to 16.0 ng/mL (7.9-35.2; P = 0.0156) and 17.2 ng/mL (10.8- 26.8; P = 0.1953) at weeks 0, 2, and 14 respectively; with a trend in boys from 2 (0.6-12.9) to 2.8 (1.7-8.6; P = 0.0840) and 3.3 (1.3-4.6; P = 0.1309). Adiponectin peaked initially from 7.8 μg/mL (4.6-11.9) at week 0 to 9.2 μg/mL (4.1-20.7; P = 0.0005) at week 2 and thereafter fell to 6.5 μg/mL (3.0-12.7; P = 0.0182) at week 14. CONCLUSIONS TNF blockade is associated with changes in circulating adipokines. The marked early increase of the potent anti-inflammatory adiponectin may contribute to the rapid response to IFX in CD.
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