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Phelps HM, Swanson KA, Steinberger AE, Guo J, King AC, Siddappa CM, Davidson NO, Rubin DC, Warner BW. Intestinal Knockout of Peroxisome Proliferator-Activated Receptor-Alpha Affects Structural Adaptation but not Liver Injury Following Massive Enterectomy. J Pediatr Surg 2023; 58:1170-1177. [PMID: 36922278 PMCID: PMC10347420 DOI: 10.1016/j.jpedsurg.2023.02.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Accepted: 02/09/2023] [Indexed: 02/19/2023]
Abstract
BACKGROUND Resection-associated liver steatosis, injury, and fibrosis is a devastating complication associated with massive small bowel resection (SBR). Peroxisome proliferator-activated receptor-alpha (PPARα) is a key regulator of intestinal lipid transport and metabolism whose expression is selectively increased after SBR. Here we asked if attenuating intestinal PPARα signaling would prevent steatosis and liver injury after SBR. METHODS Pparα was deleted selectively in adult mouse intestine using a tamoxifen-inducible Cre-LoxP breeding schema. Mice underwent 50% SBR. At 10 weeks post-operatively, metabolic phenotyping, body composition analysis, in vivo assessment of lipid absorption and intestinal permeability, and assessment of adaptation and liver injury was completed. RESULTS Pparα intestinal knockout and littermate control mice were phenotypically similar in terms of weight trends and body composition after SBR. All mice demonstrated intestinal adaptation with increased villus height and crypt depth; however, Pparα intestinal knockout mice exhibited decreased villus growth at 10 weeks compared to littermate controls. Liver injury and fibrosis were similar between groups as assessed by serum AST and ALT levels, Sirius Red staining, and hepatic expression of Col1a1 and Acta2. CONCLUSIONS Inducible intestinal deletion of Pparα influences structural adaptation but does not mitigate liver injury after SBR. These findings suggest that enterocyte PPARα signaling in adult mice is dispensable for resection-induced liver injury. The results are critical for understanding the contribution of intestinal lipid metabolic signaling pathways to the pathogenesis of hepatic injury associated with short bowel syndrome.
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Affiliation(s)
- Hannah M Phelps
- Division of Pediatric Surgery, Washington University in St. Louis School of Medicine, One Children's Place, Suite 6110, St. Louis, MO, 63110, USA.
| | - Kerry A Swanson
- Division of Pediatric Surgery, Washington University in St. Louis School of Medicine, One Children's Place, Suite 6110, St. Louis, MO, 63110, USA
| | - Allie E Steinberger
- Division of Pediatric Surgery, Washington University in St. Louis School of Medicine, One Children's Place, Suite 6110, St. Louis, MO, 63110, USA
| | - Jun Guo
- Division of Pediatric Surgery, Washington University in St. Louis School of Medicine, One Children's Place, Suite 6110, St. Louis, MO, 63110, USA
| | - Ashley C King
- Division of Pediatric Surgery, Washington University in St. Louis School of Medicine, One Children's Place, Suite 6110, St. Louis, MO, 63110, USA
| | - Chidananda Mudalagiriyappa Siddappa
- Division of Pediatric Surgery, Washington University in St. Louis School of Medicine, One Children's Place, Suite 6110, St. Louis, MO, 63110, USA
| | - Nicholas O Davidson
- Division of Gastroenterology, Washington University in St. Louis School of Medicine, St. Louis, MO, 63110, USA
| | - Deborah C Rubin
- Division of Gastroenterology, Washington University in St. Louis School of Medicine, St. Louis, MO, 63110, USA
| | - Brad W Warner
- Division of Pediatric Surgery, Washington University in St. Louis School of Medicine, One Children's Place, Suite 6110, St. Louis, MO, 63110, USA
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Bannert K, Karbe C, Förster RH, Sautter LF, Meyer F, Valentini L, Wiese ML, Ehlers L, Berlin P, Jaster R, Aghdassi AA, Lerch MM, Lamprecht G. Orally compensated short bowel patients are thin, potentially malnourished but rarely sarcopenic. Clin Nutr 2023:S0261-5614(23)00160-7. [PMID: 37311685 DOI: 10.1016/j.clnu.2023.05.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 05/09/2023] [Accepted: 05/23/2023] [Indexed: 06/15/2023]
Abstract
BACKGROUND AND AIM In short bowel syndrome, insufficient absorptive capacity of the remnant bowel may lead to metabolic and nutritional consequences including electrolyte disturbances, severe diarrhea and malnutrition. While intestinal failure requires parenteral nutrition, short bowel patients with intestinal insufficiency (SB/II) have achieved oral autonomy. The aim of this exploratory study was to assess the nutritional, muscular and functional status of orally compensated SB/II patients. METHODS 28 orally compensated SB/II patients with a mean of 46 months after termination of parenteral nutrition and 56 age- and sex-matched healthy controls (HC) were compared regarding anthropometric parameters, body composition using bioelectrical impedance analysis, handgrip strength and gait speed, blood parameters as well as nutritional intake and physical activity using validated questionnaires. Malnutrition and sarcopenia were diagnosed according to the criteria of the GLIM or EWGSOP2. RESULTS SB/II patients had lower body mass index (BMI) and anthropometric parameters than HC but were within the normal weight range. The GLIM algorithm operationally diagnosed malnutrition in 39% (n = 11) of SB/II patients. Reduced skeletal muscle mass index and phase angle were rarely accompanied by a reduction of handgrip strength below cut-off values and the subsequent diagnosis of sarcopenia in SB/II patients (15%, n = 4). Compared to 11% of HC, 37% of SB/II patients had low physical activity level. Female SB/II patients had higher caloric and macronutrient intake. Caloric intake negatively correlated with body weight indicating compensatory hyperphagia in patients with lower body weight. Some of the SB/II patients showed signs of dehydration. CONCLUSIONS Orally compensated SB/II patients are thinner than HC but have mostly normal BMI. Malnutrition is frequently diagnosed but may be overestimated due to the underlying malabsorption and its interplay with hyperphagia. Muscle mass is often reduced but is rarely accompanied by functional impairment leading to sarcopenia diagnosis. Thus, SB/II patients long term after termination of parenteral support may be malnourished but usually do not develop sarcopenia.
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Affiliation(s)
- Karen Bannert
- Rostock University Medical Center, Department of Medicine II, Division of Gastroenterology and Endocrinology, Germany
| | - Cathleen Karbe
- Rostock University Medical Center, Department of Medicine II, Division of Gastroenterology and Endocrinology, Germany
| | - Robert H Förster
- Rostock University Medical Center, Department of Medicine II, Division of Gastroenterology and Endocrinology, Germany
| | - Lea F Sautter
- Rostock University Medical Center, Department of Medicine II, Division of Gastroenterology and Endocrinology, Germany
| | - Fatuma Meyer
- University of Applied Sciences Neubrandenburg, Institute for Evidence-Based Dietetics, Germany
| | - Luzia Valentini
- University of Applied Sciences Neubrandenburg, Institute for Evidence-Based Dietetics, Germany
| | - Mats L Wiese
- University Medicine Greifswald, Department and Polyclinic of Internal Medicine A, Germany
| | - Luise Ehlers
- Rostock University Medical Center, Department of Medicine II, Division of Gastroenterology and Endocrinology, Germany
| | - Peggy Berlin
- Rostock University Medical Center, Department of Medicine II, Division of Gastroenterology and Endocrinology, Germany
| | - Robert Jaster
- Rostock University Medical Center, Department of Medicine II, Division of Gastroenterology and Endocrinology, Germany
| | - Ali A Aghdassi
- University Medicine Greifswald, Department and Polyclinic of Internal Medicine A, Germany
| | - Markus M Lerch
- LMU University Hospital, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Georg Lamprecht
- Rostock University Medical Center, Department of Medicine II, Division of Gastroenterology and Endocrinology, Germany.
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Onufer EJ, Czepielewski RS, Han YH, Courtney CM, Sutton S, Sescleifer A, Randolph GJ, Warner BW. Lipid absorption and overall intestinal lymphatic transport are impaired following partial small bowel resection in mice. Sci Rep 2022; 12:11527. [PMID: 35798817 PMCID: PMC9262882 DOI: 10.1038/s41598-022-15848-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Accepted: 06/30/2022] [Indexed: 01/16/2023] Open
Abstract
Short bowel syndrome (SBS) is associated with diminished levels of serum fats caused by unknown mechanisms. We have shown that mesenteric lymphatics remodel to a more primitive state one week after small bowel resection (SBR); therefore, this study focuses on the effect of chronic lymphatic remodeling and magnitude of resection on intestinal lipid uptake and transport. C57BL6 and Prox1 creER-Rosa26LSLTdTomato (lymphatic reporter) mice underwent 50% or 75% proximal SBR or sham operations. Functional transport of lipids and fecal fat content was measured and lymphatic vasculature was compared via imaging. There was a significant reduction in functional transport of cholesterol and triglyceride after SBR with increasing loss of bowel, mirrored by a progressive increase in fecal fat content. We also describe significant morphological changes in the lymphatic vasculature in both the lamina propria and mesentery. Intestinal lymphatic drainage assay in vivo demonstrated a marked reduction of systemic absorption after resection. Intestinal lymphatic vessels significantly remodel in the setting of chronic SBS. This remodeling may account at least in part for impaired intestinal uptake and transport of fat via the compromised lymphatic architecture. We believe that these changes may contribute to the development of intestinal failure associated liver disease (IFALD), a major morbidity in patients with SBS.
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Affiliation(s)
- Emily J Onufer
- Division of Pediatric Surgery, Department of Surgery, St. Louis Children's Hospital, Washington University in St. Louis School of Medicine, St. Louis, MO, USA
| | - Rafael S Czepielewski
- Department of Pathology and Immunology, Washington University in St. Louis, St. Louis, MO, USA
| | - Yong-Hyun Han
- Department of Pathology and Immunology, Washington University in St. Louis, St. Louis, MO, USA
- Laboratory of Pathology and Physiology, College of Pharmacy, Kangwon National University, Chuncheon, 24341, South Korea
| | - Cathleen M Courtney
- Division of Pediatric Surgery, Department of Surgery, St. Louis Children's Hospital, Washington University in St. Louis School of Medicine, St. Louis, MO, USA
| | - Stephanie Sutton
- Division of Pediatric Surgery, Department of Surgery, St. Louis Children's Hospital, Washington University in St. Louis School of Medicine, St. Louis, MO, USA
| | | | - Gwendalyn J Randolph
- Department of Pathology and Immunology, Washington University in St. Louis, St. Louis, MO, USA
| | - Brad W Warner
- Division of Pediatric Surgery, Department of Surgery, St. Louis Children's Hospital, Washington University in St. Louis School of Medicine, St. Louis, MO, USA.
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Onufer EJ, Han YH, Courtney C, Steinberger A, Tecos M, Sutton S, Sescleifer A, Ou J, Sanguinetti Czepielewski R, Randolph GJ, Warner BW. Liver injury after small bowel resection is prevented in obesity-resistant 129S1/SvImJ mice. Am J Physiol Gastrointest Liver Physiol 2021; 320:G907-G918. [PMID: 33729834 PMCID: PMC8202193 DOI: 10.1152/ajpgi.00284.2020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Intestinal failure-associated liver disease is a major morbidity associated with short bowel syndrome. We sought to determine if the obesity-resistant mouse strain (129S1/SvImJ) conferred protection from liver injury after small bowel resection (SBR). Using a parenteral nutrition-independent model of resection-associated liver injury, C57BL/6J and 129S1/SvImJ mice underwent a 50% proximal SBR or sham operation. At postoperative week 10, hepatic steatosis, fibrosis, and cholestasis were assessed. Hepatic and systemic inflammatory pathways were evaluated using oxidative markers and abundance of tissue macrophages. Potential mechanisms of endotoxin resistance were also explored. Serum lipid levels were elevated in all mouse lines. Hepatic triglyceride levels were no different between mouse strains, but there was an increased accumulation of free fatty acids in the C57BL/6J mice. Histological and serum markers of hepatic fibrosis, steatosis, and cholestasis were significantly elevated in resected C57BL/6J SBR mice as well as oxidative stress markers and macrophage recruitment in both the liver and visceral white fat in C57BL/6J mice compared with sham controls and the 129S1/SvImJ mouse line. Serum endotoxin levels were significantly elevated in C57BL/6J mice with significant elevation of hepatic TLR4 and reduction in PPARα expression levels. Despite high levels of serum lipids, 129S1/SvImJ mice did not develop liver inflammation, fibrosis, or cholestasis after SBR, unlike C57BL/6J mice. These data suggest that the accumulation of hepatic free fatty acids as well as increased endotoxin-driven inflammatory pathways through PPARα and TLR4 contribute to the liver injury seen in C57BL/6J mice with short bowel syndrome.NEW & NOTEWORTHY Unlike C57BL/6 mice, the 129S1/SvImJ strain is resistant to liver inflammation and injury after small bowel resection. These disparate outcomes are likely due to the accumulation of hepatic free fatty acids as well as increased endotoxin-driven inflammatory pathways through PPARα and TLR4 in C57BL/6 mice with short bowel syndrome.
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Affiliation(s)
- Emily J. Onufer
- 1Division of Pediatric Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, Missouri
| | - Yong-Hyun Han
- 2Laboratory of Pathology and Physiology, College of Pharmacy,
Kangwon National University, Chuncheon, South Korea,3Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, Missouri
| | - Cathleen Courtney
- 1Division of Pediatric Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, Missouri
| | - Allie Steinberger
- 1Division of Pediatric Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, Missouri
| | - Maria Tecos
- 1Division of Pediatric Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, Missouri
| | - Stephanie Sutton
- 1Division of Pediatric Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, Missouri
| | - Anne Sescleifer
- 1Division of Pediatric Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, Missouri
| | - Jocelyn Ou
- 1Division of Pediatric Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, Missouri
| | | | - Gwendalyn J. Randolph
- 3Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, Missouri
| | - Brad W. Warner
- 1Division of Pediatric Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, Missouri
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5
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Courtney CM, Onufer EJ, McDonald KG, Steinberger AE, Sescleifer AM, Seiler KM, Tecos ME, Newberry RD, Warner BW. Small Bowel Resection Increases Paracellular Gut Barrier Permeability via Alterations of Tight Junction Complexes Mediated by Intestinal TLR4. J Surg Res 2021; 258:73-81. [PMID: 33002664 PMCID: PMC7937530 DOI: 10.1016/j.jss.2020.08.049] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Revised: 07/22/2020] [Accepted: 08/25/2020] [Indexed: 02/07/2023]
Abstract
BACKGROUND Short bowel syndrome resulting from small bowel resection (SBR) is associated with significant morbidity and mortality. Many adverse sequelae including steatohepatitis and bacterial overgrowth are thought to be related to increased bacterial translocation, suggesting alterations in gut permeability. We hypothesized that after intestinal resection, the intestinal barrier is altered via toll-like receptor 4 (TLR4) signaling at the intestinal level. METHODS B6 and intestinal-specific TLR4 knockout (iTLR4 KO) mice underwent 50% SBR or sham operation. Transcellular permeability was evaluated by measuring goblet cell associated antigen passages via two-photon microscopy. Fluorimetry and electron microscopy evaluation of tight junctions (TJ) were used to assess paracellular permeability. In parallel experiments, single-cell RNA sequencing measured expression of intestinal integral TJ proteins. Western blot and immunohistochemistry confirmed the results of the single-cell RNA sequencing. RESULTS There were similar number of goblet cell associated antigen passages after both SBR and sham operation (4.5 versus 5.0, P > 0.05). Fluorescein isothiocyanate-dextran uptake into the serum after massive SBR was significantly increased compared with sham mice (2.13 ± 0.39 ng/μL versus 1.62 ± 0.23 ng/μL, P < 0.001). SBR mice demonstrated obscured TJ complexes on electron microscopy. Single-cell RNA sequencing revealed a decrease in TJ protein occludin (21%) after SBR (P < 0.05), confirmed with immunostaining and western blot analysis. The KO of iTLR4 mitigated the alterations in permeability after SBR. CONCLUSIONS Permeability after SBR is increased via changes at the paracellular level. However, these alterations were prevented in iTLR4 mice. These findings suggest potential protein targets for restoring the intestinal barrier and obviating the adverse sequelae of short bowel syndrome.
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Affiliation(s)
- Cathleen M Courtney
- Division of Pediatric Surgery, Department of Surgery, St. Louis Children's Hospital, Washington University School of Medicine, St. Louis, Missouri
| | - Emily J Onufer
- Division of Pediatric Surgery, Department of Surgery, St. Louis Children's Hospital, Washington University School of Medicine, St. Louis, Missouri
| | - Keely G McDonald
- Division of Gastroenterology, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri
| | - Allie E Steinberger
- Division of Pediatric Surgery, Department of Surgery, St. Louis Children's Hospital, Washington University School of Medicine, St. Louis, Missouri
| | - Anne M Sescleifer
- Division of Pediatric Surgery, Department of Surgery, St. Louis Children's Hospital, Washington University School of Medicine, St. Louis, Missouri
| | - Kristen M Seiler
- Division of Pediatric Surgery, Department of Surgery, St. Louis Children's Hospital, Washington University School of Medicine, St. Louis, Missouri
| | - Maria E Tecos
- Division of Pediatric Surgery, Department of Surgery, St. Louis Children's Hospital, Washington University School of Medicine, St. Louis, Missouri
| | - Rodney D Newberry
- Division of Gastroenterology, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri
| | - Brad W Warner
- Division of Pediatric Surgery, Department of Surgery, St. Louis Children's Hospital, Washington University School of Medicine, St. Louis, Missouri.
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6
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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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Onufer EJ, Han YH, Czepielewski RS, Courtney CM, Sutton S, Randolph GJ, Warner BW. Effects of high-fat diet on liver injury after small bowel resection. J Pediatr Surg 2020; 55:1099-1106. [PMID: 32164985 PMCID: PMC7299751 DOI: 10.1016/j.jpedsurg.2020.02.037] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Accepted: 02/20/2020] [Indexed: 02/07/2023]
Abstract
BACKGROUND The optimal regimen for enteral nutritional support in the management of children with short bowel syndrome (SBS) is not well characterized. A high fat, enteral diet is theoretically beneficial due to increased caloric density and enhanced structural adaptation. We therefore sought to determine the long-term effects of a high fat diet (HFD) on liver injury, a common complication of SBS, compared to a standard chow (SC) diet. METHODS Using a parenteral nutrition-independent model of resection-associated liver injury, C57BL/6 mice underwent a sham operation or a 50% or 75% proximal small bowel resection (SBR). Mice in each group were then fed either a HFD (35% kcal fat) or SC (13% kcal fat). At post-operative week 15, markers of liver injury were quantified. RESULTS Liver triglyceride levels were increased from 7- to 19-fold in mice on the HFD compared to mice fed SC in the sham, 50%, and 75% resection groups. Serum ALT (2.2-fold increase in 75% resected mice compared to sham controls) and AST (2.0- and 2.7-fold increases in 50% and 75% resected mice, respectively) levels as well as fibrotic liver staining were elevated only in resected mice fed a HFD. CONCLUSION Long-term enteral feeding of HFD in our murine SBS model is associated with hepatic steatosis and liver injury. Our observation that liver steatosis and injury occur independent of parenteral nutrition suggests that enteral feeding composition and magnitude of intestinal loss may make a significant contribution to intestinal failure-associated liver disease.
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Affiliation(s)
- Emily J. Onufer
- Division of Pediatric Surgery, Department of Surgery, St. Louis Children’s Hospital, Washington University in St. Louis School of Medicine, St. Louis, MO
| | - Yong-Hyun Han
- Department of Pathology and Immunology, Washington University in St. Louis, St. Louis, MO
| | - Rafael S. Czepielewski
- Department of Pathology and Immunology, Washington University in St. Louis, St. Louis, MO
| | - Cathleen M. Courtney
- Division of Pediatric Surgery, Department of Surgery, St. Louis Children’s Hospital, Washington University in St. Louis School of Medicine, St. Louis, MO
| | - Stephanie Sutton
- Division of Pediatric Surgery, Department of Surgery, St. Louis Children’s Hospital, Washington University in St. Louis School of Medicine, St. Louis, MO
| | - Gwendalyn J. Randolph
- Department of Pathology and Immunology, Washington University in St. Louis, St. Louis, MO
| | - Brad W. Warner
- Division of Pediatric Surgery, Department of Surgery, St. Louis Children’s Hospital, Washington University in St. Louis School of Medicine, St. Louis, MO
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8
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Engelstad HJ, Barron L, Moen J, Wylie TN, Wylie K, Rubin DC, Davidson N, Cade WT, Warner BB, Warner BW. Remnant Small Bowel Length in Pediatric Short Bowel Syndrome and the Correlation with Intestinal Dysbiosis and Linear Growth. J Am Coll Surg 2018; 227:439-449. [PMID: 30077861 PMCID: PMC6162148 DOI: 10.1016/j.jamcollsurg.2018.07.657] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Revised: 07/20/2018] [Accepted: 07/23/2018] [Indexed: 12/13/2022]
Abstract
BACKGROUND Pediatric short bowel syndrome (SBS) is a malabsorptive state placing patients at risk for malnutrition, dehydration, and bacterial overgrowth. These patients are often dependent on parenteral nutrition (PN) while intestinal adaptation is underway. The aim of this study was to characterize the effect of remnant small bowel length on the gut microbiome. Further, we sought to examine the contribution of clinical and nutritional variables to the gut microbiota and anthropometric growth. STUDY DESIGN Clinical data, anthropometrics, and fecal samples were collected from 14 SBS patients and 10 age- and sex-matched controls. Fecal bacterial DNA composition was analyzed using 16s ribosomal RNA gene sequencing. Statistical analysis was completed using the Mann-Whitney or Fisher's exact tests when applicable and linear mixed effect modeling. RESULTS Distinct microbiota changes were found among those with the least remaining small bowel (<35 cm) compared with those with longer remaining bowel and controls. Those with <35 cm small bowel displayed an increased relative abundance of Proteobacteria, while those with longer remaining small bowel had a higher proportion of Firmicutes. Further, patients with less remaining bowel required more PN (p < 0.01), with a tendency to be shorter in height (p = 0.05) and with a higher BMI (p = 0.05). CONCLUSIONS Remnant small bowel length appears to be a predictor of stunting with diminished linear growth, parenteral nutrition dependency, and a greater relative abundance of Proteobacteria in the gut. These findings suggest an integrated adaptive response predicted by remnant intestinal length. Further research is necessary to examine the effects of intestinal dysbiosis on clinical outcomes.
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Affiliation(s)
- Holly J Engelstad
- Department of Pediatrics, Washington University, School of Medicine, St Louis, MO
| | - Lauren Barron
- Department of Surgery, Washington University, School of Medicine, St Louis, MO
| | - Joseph Moen
- Department of Biostatistics, Washington University, School of Medicine, St Louis, MO
| | - Todd N Wylie
- Department of Pediatrics, Washington University, School of Medicine, St Louis, MO
| | - Kristine Wylie
- Department of Pediatrics, Washington University, School of Medicine, St Louis, MO
| | - Deborah C Rubin
- Department of Medicine, Washington University, School of Medicine, St Louis, MO
| | - Nicholas Davidson
- Department of Medicine, Washington University, School of Medicine, St Louis, MO
| | - W Todd Cade
- Department of Medicine, Washington University, School of Medicine, St Louis, MO; Program in Physical Therapy, Washington University, School of Medicine, St Louis, MO
| | - Barbara B Warner
- Department of Pediatrics, Washington University, School of Medicine, St Louis, MO
| | - Brad W Warner
- Department of Surgery, Washington University, School of Medicine, St Louis, MO.
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9
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Barron L, Courtney C, Bao J, Onufer E, Panni RZ, Aladegbami B, Warner BW. Intestinal resection-associated metabolic syndrome. J Pediatr Surg 2018; 53:1142-1147. [PMID: 29588076 PMCID: PMC5994370 DOI: 10.1016/j.jpedsurg.2018.02.077] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Accepted: 02/27/2018] [Indexed: 01/04/2023]
Abstract
BACKGROUND Short bowel syndrome occurs following massive small bowel resection (SBR) and is one of the most lethal diseases of childhood. We have previously demonstrated hepatic steatosis, altered gut microbiome, and increased fat deposition in our murine model of SBR. These novel findings prompted us to investigate potential alterations in glucose metabolism and systemic inflammation following intestinal resection. METHODS Male C57BL6 mice underwent 50% proximal SBR or sham operation. Body weight and composition were measured. Fasting blood glucose (FBG), glucose, and insulin tolerance testing were performed. Small bowel, pancreas, and serum were collected at sacrifice and analyzed. RESULTS SBR mice gained less weight than shams after 10weeks. Despite this, FBG in resected mice was significantly higher than sham animals. After SBR, mice demonstrated perturbed body composition, higher blood glucose, increased pancreatic islet area, and increased systemic inflammation compared with sham mice. Despite these changes, we found no alteration in insulin tolerance after resection. CONCLUSIONS After massive SBR, we present evidence for abnormal body composition, glucose metabolism, and systemic inflammation. These findings, coupled with resection-associated hepatic steatosis, suggest that massive SBR (independent of parenteral nutrition) results in metabolic consequences not previously described and provides further evidence to support the presence of a novel resection-associated metabolic syndrome.
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Affiliation(s)
- Lauren Barron
- Division of Pediatric Surgery, Department of Surgery, Washington University School of Medicine in St. Louis, St. Louis, MO, USA; St. Louis Children's Hospital, St. Louis, MO, USA
| | - Cathleen Courtney
- Division of Pediatric Surgery, Department of Surgery, Washington University School of Medicine in St. Louis, St. Louis, MO, USA; St. Louis Children's Hospital, St. Louis, MO, USA
| | - James Bao
- Division of Pediatric Surgery, Department of Surgery, Washington University School of Medicine in St. Louis, St. Louis, MO, USA; St. Louis Children's Hospital, St. Louis, MO, USA
| | - Emily Onufer
- Division of Pediatric Surgery, Department of Surgery, Washington University School of Medicine in St. Louis, St. Louis, MO, USA; St. Louis Children's Hospital, St. Louis, MO, USA
| | - Roheena Z Panni
- Division of Pediatric Surgery, Department of Surgery, Washington University School of Medicine in St. Louis, St. Louis, MO, USA; St. Louis Children's Hospital, St. Louis, MO, USA
| | - Bola Aladegbami
- Division of Pediatric Surgery, Department of Surgery, Washington University School of Medicine in St. Louis, St. Louis, MO, USA; St. Louis Children's Hospital, St. Louis, MO, USA
| | - Brad W Warner
- Division of Pediatric Surgery, Department of Surgery, Washington University School of Medicine in St. Louis, St. Louis, MO, USA; St. Louis Children's Hospital, St. Louis, MO, USA.
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Effects of exogenous glucagon-like peptide-2 and distal bowel resection on intestinal and systemic adaptive responses in rats. PLoS One 2017; 12:e0181453. [PMID: 28738080 PMCID: PMC5524396 DOI: 10.1371/journal.pone.0181453] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2017] [Accepted: 07/01/2017] [Indexed: 12/15/2022] Open
Abstract
OBJECTIVE To determine the effects of exogenous glucagon-like peptide-2 (GLP-2), with or without massive distal bowel resection, on adaptation of jejunal mucosa, enteric neurons, gut hormones and tissue reserves in rats. BACKGROUND GLP-2 is a gut hormone known to be trophic for small bowel mucosa, and to mimic intestinal adaptation in short bowel syndrome (SBS). However, the effects of exogenous GLP-2 and SBS on enteric neurons are unclear. METHODS Sprague Dawley rats were randomized to four treatments: Transected Bowel (TB) (n = 8), TB + GLP-2 (2.5 nmol/kg/h, n = 8), SBS (n = 5), or SBS + GLP-2 (2.5 nmol/kg/h, n = 9). SBS groups underwent a 60% jejunoileal resection with cecectomy and jejunocolic anastomosis. All rats were maintained on parenteral nutrition for 7 d. Parameters measured included gut morphometry, qPCR for hexose transporter (SGLT-1, GLUT-2, GLUT-5) and GLP-2 receptor mRNA, whole mount immunohistochemistry for neurons (HuC/D, VIP, nNOS), plasma glucose, gut hormones, and body composition. RESULTS Resection increased the proportion of nNOS immunopositive myenteric neurons, intestinal muscularis propria thickness and crypt cell proliferation, which were not recapitulated by GLP-2 therapy. Exogenous GLP-2 increased jejunal mucosal surface area without affecting enteric VIP or nNOS neuronal immunopositivity, attenuated resection-induced reductions in jejunal hexose transporter abundance (SGLT-1, GLUT-2), increased plasma amylin and decreased peptide YY concentrations. Exogenous GLP-2 attenuated resection-induced increases in blood glucose and body fat loss. CONCLUSIONS Exogenous GLP-2 stimulates jejunal adaptation independent of enteric neuronal VIP or nNOS changes, and has divergent effects on plasma amylin and peptide YY concentrations. The novel ability of exogenous GLP-2 to modulate resection-induced changes in peripheral glucose and lipid reserves may be important in understanding the whole-body response following intestinal resection, and is worthy of further study.
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Barron LK, Bao JW, Aladegbami BG, Colasanti JJ, Guo J, Erwin CR, Warner BW. Toll-like receptor 4 is critical for the development of resection-associated hepatic steatosis. J Pediatr Surg 2017; 52:1014-1019. [PMID: 28351520 PMCID: PMC5466889 DOI: 10.1016/j.jpedsurg.2017.03.026] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2017] [Accepted: 03/09/2017] [Indexed: 12/12/2022]
Abstract
BACKGROUND A significant number of children with short bowel syndrome experience intestinal failure-associated liver disease. We recently demonstrated accelerated hepatic steatosis after 50% small bowel resection (SBR) in mice. Since SBR is associated with alterations in the gut microbiome, the purpose of this study was to determine whether TLR4 signaling is critical to the development of resection-associated hepatic steatosis. METHODS Male C57BL6 (control) and TLR4-knockout (KO) mice underwent 50% proximal SBR. Liver sections were analyzed to obtain the percent lipid content, and Ileal sections were assessed for morphological adaptation. Intestinal TLR4 mRNA expression was measured at 7days and 10weeks. RESULTS Compared to controls, TLR4 KO mice demonstrated similar weight gain and morphological adaptation after SBR. Hepatic steatosis was decreased 32-fold in the absence of TLR4. Intestinal TLR4 mRNA expression was significantly elevated 7days after SBR. We also found that TLR4 expression in the intestine was 20-fold higher in whole bowel sections compared with isolated enterocytes. CONCLUSIONS TLR4 signaling is critical for the development of resection-associated steatosis, but not involved in intestinal adaptation after massive SBR. Further studies are needed to delineate the mechanism for TLR4 signaling in the genesis of resection-associated liver injury. LEVEL OF EVIDENCE Animal study, not clinical.
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Affiliation(s)
- Lauren K Barron
- Division of Pediatric Surgery, Department of Surgery, Washington University School of Medicine in St. Louis, St. Louis, MO, USA; St. Louis Children's Hospital, St. Louis, MO, USA
| | - James W Bao
- Division of Pediatric Surgery, Department of Surgery, Washington University School of Medicine in St. Louis, St. Louis, MO, USA; St. Louis Children's Hospital, St. Louis, MO, USA
| | - Bola G Aladegbami
- Division of Pediatric Surgery, Department of Surgery, Washington University School of Medicine in St. Louis, St. Louis, MO, USA; St. Louis Children's Hospital, St. Louis, MO, USA
| | - Jason J Colasanti
- Division of Pediatric Surgery, Department of Surgery, Washington University School of Medicine in St. Louis, St. Louis, MO, USA; St. Louis Children's Hospital, St. Louis, MO, USA
| | - Jun Guo
- Division of Pediatric Surgery, Department of Surgery, Washington University School of Medicine in St. Louis, St. Louis, MO, USA; St. Louis Children's Hospital, St. Louis, MO, USA
| | - Christopher R Erwin
- Division of Pediatric Surgery, Department of Surgery, Washington University School of Medicine in St. Louis, St. Louis, MO, USA; St. Louis Children's Hospital, St. Louis, MO, USA
| | - Brad W Warner
- Division of Pediatric Surgery, Department of Surgery, Washington University School of Medicine in St. Louis, St. Louis, MO, USA; St. Louis Children's Hospital, St. Louis, MO, USA.
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12
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Barron LK, Gayer CP, Roberts A, Golden JM, Aladegbami BG, Guo J, Erwin CR, Warner BW. Liver steatosis induced by small bowel resection is prevented by oral vancomycin. Surgery 2016; 160:1485-1495. [PMID: 27592213 DOI: 10.1016/j.surg.2016.07.018] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Revised: 06/16/2016] [Accepted: 07/07/2016] [Indexed: 02/08/2023]
Abstract
BACKGROUND Intestinal failure-associated liver disease causes significant mortality in patients with short bowel syndrome. Steatosis, a major component of intestinal failure-associated liver disease has been shown to persist even after weaning from parenteral nutrition. We sought to determine whether steatosis occurs in our murine model of short bowel syndrome and whether steatosis was affected by manipulation of the intestinal microbiome. METHODS Male C57BL6 mice underwent 50% small bowel resection and orogastric gavage with vancomycin or vehicle for 10 weeks. DNA was extracted from stool samples then sequenced using 16s rRNA. Liver lipid content was analyzed. Bile acids were measured in liver and stool. RESULTS Compared with unoperated mice, small bowel resection resulted in significant changes in the fecal microbiome and was associated with a >25-fold increase in steatosis. Oral vancomycin profoundly altered the gut microbiome and was associated with a 15-fold reduction in hepatic lipid content after resection. There was a 17-fold reduction in fecal secondary bile acids after vancomycin treatment. CONCLUSION Massive small bowel resection in mice is associated with development of steatosis and prevented by oral vancomycin. These findings implicate a critical role for gut bacteria in intestinal failure-associated liver disease pathogenesis and illuminate a novel, operative model for future investigation into this important morbidity.
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Affiliation(s)
- Lauren K Barron
- Department Of Surgery, Washington University in St. Louis, St. Louis, MO; Division of Pediatric Surgery, St. Louis Children's Hospital, St. Louis, MO
| | - Christopher P Gayer
- Keck School of Medicine, University of Southern California, Los Angeles, CA; Division of Pediatric Surgery, Children's Hospital Los Angeles, Los Angeles, CA
| | - Anne Roberts
- Division of Pediatric Surgery, Children's Hospital Los Angeles, Los Angeles, CA
| | - Jamie M Golden
- Division of Pediatric Surgery, Children's Hospital Los Angeles, Los Angeles, CA
| | - Bola G Aladegbami
- Department Of Surgery, Washington University in St. Louis, St. Louis, MO; Division of Pediatric Surgery, St. Louis Children's Hospital, St. Louis, MO
| | - Jun Guo
- Division of Pediatric Surgery, St. Louis Children's Hospital, St. Louis, MO
| | | | - Brad W Warner
- Department Of Surgery, Washington University in St. Louis, St. Louis, MO; Division of Pediatric Surgery, St. Louis Children's Hospital, St. Louis, MO.
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Diaz-Miron J, Sun R, Choi P, Sommovilla J, Guo J, Erwin CR, Mei J, Scott Worthen G, Warner BW. The effect of impaired angiogenesis on intestinal function following massive small bowel resection. J Pediatr Surg 2015; 50:948-53. [PMID: 25818317 PMCID: PMC4439276 DOI: 10.1016/j.jpedsurg.2015.03.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Accepted: 03/10/2015] [Indexed: 01/01/2023]
Abstract
PURPOSE Intestinal adaptation involves villus lengthening, crypt deepening, and increased capillary density following small bowel resection (SBR). Mice lacking the proangiogenic chemokine CXCL5 have normal structural adaptation but impaired angiogenesis. This work evaluates the impact of incomplete adaptive angiogenesis on the functional capacity of the intestine after SBR. METHODS CXCL5 knockout (KO) and C57BL/6 wild-type (WT) mice underwent 50% SBR. Magnetic resonance imaging measured weekly body composition. Intestinal absorptive capacity was evaluated through fecal fat analysis. Gene expression profiles for select macronutrient transporters were measured via RT-PCR. Postoperative crypt and villus measurements were assessed for structural adaptation. Submucosal capillary density was measured through CD31 immunohistochemistry. RESULTS Comparable postoperative weight gain occurred initially. Diminished weight gain, impaired fat absorption, and elevated steatorrhea occurred in KO mice after instituting high-fat diet. Greater postoperative upregulation of ABCA1 fat transporter occurred in WT mice, while PEPT1 protein transporter was significantly downregulated in KO mice. KO mice had impaired angiogenesis but intact structural adaptation. CONCLUSION After SBR, KO mice display an inefficient intestinal absorption profile with perturbed macronutrient transporter expression, impaired fat absorption, and slower postoperative weight gain. In addition to longer villi and deeper crypts, an intact angiogenic response may be required to achieve functional adaptation to SBR.
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Affiliation(s)
- Jose Diaz-Miron
- Division of Pediatric Surgery, St Louis Children's Hospital, Department of Surgery, Washington University School of Medicine, St Louis, MO
| | - Raphael Sun
- Division of Pediatric Surgery, St Louis Children's Hospital, Department of Surgery, Washington University School of Medicine, St Louis, MO
| | - Pamela Choi
- Division of Pediatric Surgery, St Louis Children's Hospital, Department of Surgery, Washington University School of Medicine, St Louis, MO
| | - Joshua Sommovilla
- Division of Pediatric Surgery, St Louis Children's Hospital, Department of Surgery, Washington University School of Medicine, St Louis, MO
| | - Jun Guo
- Division of Pediatric Surgery, St Louis Children's Hospital, Department of Surgery, Washington University School of Medicine, St Louis, MO
| | - Christopher R Erwin
- Division of Pediatric Surgery, St Louis Children's Hospital, Department of Surgery, Washington University School of Medicine, St Louis, MO
| | - Junjie Mei
- Division of Neonatology, The Children's Hospital of Philadelphia, Philadelphia, PA
| | - G Scott Worthen
- Division of Neonatology, The Children's Hospital of Philadelphia, Philadelphia, PA
| | - Brad W Warner
- Division of Pediatric Surgery, St Louis Children's Hospital, Department of Surgery, Washington University School of Medicine, St Louis, MO.
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High-protein diet improves postoperative weight gain after massive small-bowel resection. J Gastrointest Surg 2015; 19:451-7. [PMID: 25519080 PMCID: PMC4965231 DOI: 10.1007/s11605-014-2715-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Accepted: 11/21/2014] [Indexed: 01/31/2023]
Abstract
INTRODUCTION Short bowel syndrome (SBS) is a morbid clinical condition that results from massive small-bowel resection (SBR). After SBR, there is a dramatic weight loss in the acute postoperative period. Our aim was to determine the impact of a high-protein diet (HPD) on weight gain and body composition in mice after SBR. METHODS C57BL/6 mice underwent 50 % proximal SBR. Postoperatively, mice were randomly selected to receive standard rodent liquid diet (LD) (n = 6) or an isocaloric HPD (n = 9) for 28 days. Mice weights were recorded daily. Body composition analyses were obtained weekly. Student's t test was used for statistical comparisons with p < 0.05 considered significant. RESULTS Mice that were fed HPD after SBR returned to baseline weight on average at postoperative day (POD) 8 versus mice that were fed LD that returned to baseline weight on average at POD 22. Total fat mass and lean mass were significantly greater by POD 14 within the HPD group. Both groups of mice demonstrated normal structural adaptation. CONCLUSION HPD results in greater weight gain and improved body composition in mice after SBR. This finding may be clinically important for patients with SBS since improved weight gain may reduce the time needed for parenteral nutrition.
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Small bowel resection induces long-term changes in the enteric microbiota of mice. J Gastrointest Surg 2015; 19:56-64; discussion 64. [PMID: 25183407 PMCID: PMC4576885 DOI: 10.1007/s11605-014-2631-0] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2014] [Accepted: 08/11/2014] [Indexed: 01/31/2023]
Abstract
PURPOSE The enteric microbiome is known to play a major role in healthy gut homeostasis and several disease states. It may also contribute to both the intestinal recovery and complications that occur in patients with short bowel syndrome. The extent and nature of alterations to the gut microbiota following intestinal resection, however, are not well studied in a controlled setting. The purpose of this investigation is to characterize the effects of massive small bowel resection on the murine enteric microflora. METHODS Wild-type C57BL6 mice, following a week of acclamation to a liquid rodent diet, underwent either 50% proximal small bowel resection (SBR) or a sham operation. Mice were sacrificed, and enteric contents from the small bowel, cecum, and stool were harvested at 7 and 90 days post-operatively. DNA was isolated, and the V3-V5 regions of the 16s rRNA gene amplified and pyrosequenced on a Roche 454 platform. Sequences were clustered into operation taxonomic units and classified. Communities were then analyzed for diversity and phylogenic composition. RESULTS In the long-term group, the microbes inhabiting the ileum of mice undergoing SBR and sham operation differed significantly at the genus level (p < 0.001). Small bowel contents collected before and after SBR also differed significantly (p = 0.006). This was driven by an increase in Lactobacillus and decrease in Enterobacteriaceae species in mice undergoing SBR. No difference was seen in the long-term stool or in stool, cecal, or ileal contents in the short-term. No difference in microbial community diversity was found in any group. CONCLUSION Bowel resection induces long-term changes in the microbial community of the murine ileum, but not at more distal sites of the gastrointestinal tract. The increase in Lactobacillus encountered small bowel of resected mice correlates with limited previous studies. These changes may reflect an adaptive response of the microbiota to maximize energy extraction, but further studies are needed to establish the role played by this altered community.
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Variability of resting energy expenditure in infants and young children with intestinal failure-associated liver disease. J Pediatr Gastroenterol Nutr 2014; 58:637-41. [PMID: 24361903 PMCID: PMC5025756 DOI: 10.1097/mpg.0000000000000288] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
OBJECTIVE The aim of the study was to determine, in a cohort of young children with intestinal failure (IF), whether the estimates of basal metabolic rate (BMR) by standard equations can approximate measured resting energy expenditure (REE) by indirect calorimetry (IC). METHODS IC was performed using the dilutional canopy technique. REE measurements were compared with standard, age-based estimation equations (World Health Organization) for BMR. Subjects were classified as hypermetabolic (REE > 110% BMR), hypometabolic (REE < 90% BMR), or normal (REE = 90%-110% BMR). RESULTS Twenty-eight IF patients (11 girls, 17 boys) had an underlying diagnosis of necrotizing enterocolitis (n = 10) or a congenital gastrointestinal defect (n = 18). Median age was 5.3 months. Median interquartile range (IQR) REE was 46 (42-58) kcal · kg · day. Median (IQR) total energy intake provided 209% (172%-257%) of REE, with parenteral nutrition providing 76% (23%) of total energy intake. REE was variable, with 39% (n = 11) of measurements hypermetabolic, 39% (n = 11) hypometabolic, and the remaining 21% (n = 6) normal. Although REE was well correlated with estimated BMR (r = 0.82, P < 0.0001), estimated BMR was not consistently an adequate predictor of REE. BMR over- or underestimated REE by >10 kcal · kg · day in 15 of 28 (54%) patients. REE was not significantly correlated with severity of liver disease, nutritional status, total energy intake, or gestational age. CONCLUSIONS Energy expenditure is variable among children with IF and IF-associated liver disease, with approximately 80% of our cohort exhibiting either hypo- or hypermetabolism. Standard estimation equations frequently do not correctly predict individual REE. Longitudinal studies of energy expenditure and body composition may be needed to guide provision of nutrition regimens.
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Thompson JS, Weseman RA, Rochling FA, Grant WJ, Botha JF, Langnas AN, Mercer DF. Pre-resection gastric bypass reduces post-resection body mass index but not liver disease in short bowel syndrome. Am J Surg 2014; 207:942-8. [PMID: 24507944 DOI: 10.1016/j.amjsurg.2013.10.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2013] [Revised: 09/16/2013] [Accepted: 10/03/2013] [Indexed: 12/26/2022]
Abstract
BACKGROUND Obese patients developing short bowel syndrome (SBS) maintain a higher body mass index (BMI) and have increased risk of hepatobiliary complications. Our aim was to determine the effect of pre-resection gastric bypass (GBP) on SBS outcome. METHODS We reviewed 136 adults with SBS: 69 patients with initial BMI < 35 were controls; 43 patients with BMI > 35 were the obese group; and 24 patients had undergone GBP before SBS. RESULTS BMI at 1, 2, and 5 years was similar in control and GBP groups, whereas obese patients had a persistently increased BMI. Eight (33%) of the GBP patients had a pre-resection BMI > 35, but post-SBS BMI was similar to those <35. Obese patients were more likely to wean off PN (47% vs 20% control and 12% GBP, P < .05). Radiographic fatty liver tended to be higher in the GBP group (54% vs 19% control and 35% obese). End-stage liver disease occurred more frequently in obese and GBP patients (30% and 33% vs 13%, P < .05). CONCLUSIONS Pre-resection GBP prevents the nutritional benefits of obesity but does not eliminate the increased risk of hepatobiliary disease in obese SBS patients. This occurs independent of pre-SBS BMI suggesting the importance of GBP itself or history of obesity rather than weight loss.
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Affiliation(s)
- Jon S Thompson
- Department of Surgery, University of Nebraska Medical Center Omaha, Omaha, NE, USA.
| | - Rebecca A Weseman
- Department of Surgery, University of Nebraska Medical Center Omaha, Omaha, NE, USA
| | - Fedja A Rochling
- Department of Internal Medicine, University of Nebraska Medical Center Omaha, Omaha, NE, USA
| | - Wendy J Grant
- Department of Surgery, University of Nebraska Medical Center Omaha, Omaha, NE, USA
| | - Jean F Botha
- Department of Surgery, University of Nebraska Medical Center Omaha, Omaha, NE, USA
| | - Alan N Langnas
- Department of Surgery, University of Nebraska Medical Center Omaha, Omaha, NE, USA
| | - David F Mercer
- Department of Surgery, University of Nebraska Medical Center Omaha, Omaha, NE, USA
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Abstract
Adaptation is an important compensatory response to environmental cues resulting in enhanced survival. In the gut, the abrupt loss of intestinal length is characterized by increased rates of enterocyte proliferation and apoptosis and culminates in adaptive villus and crypt growth. In the development of an academic pediatric surgical career, adaptation is also an important compensatory response to survive the ever changing research, clinical, and economic environment. The ability to adapt in both situations is critical for patients and a legacy of pediatric surgical contributions to advance our knowledge of multiple conditions and diseases.
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Current World Literature. Curr Opin Support Palliat Care 2009; 3:79-82. [DOI: 10.1097/spc.0b013e3283277013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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