Expansion of intestinal stem cells associated with long-term adaptation following ileocecal resection in mice.
نویسندگان
چکیده
Sustained increases in mucosal surface area occur in remaining bowel following massive intestinal loss. The mechanisms responsible for expanding and perpetuating this response are not presently understood. We hypothesized that an increase in the number of intestinal stem cells (ISC) occurs following intestinal resection and is an important component of the adaptive response in mice. This was assessed in the jejunum of mice 2-3 days, 4-5 days, 6-7 days, 2 wk, 6 wk, and 16 wk following ileocecal resection (ICR) or sham operation. Changes in ISC following ICR compared with sham resulted in increased crypt fission and were assayed by 1) putative ISC population (SP) by flow cytometry, 2) Musashi-1 immunohistochemistry, and 3) bromodeoxyuridine (BrdU) label retention. Observed early increases in crypt depth and villus height were not sustained 16 wk following operation. In contrast, long-term increases in intestinal caliber and overall number of crypts per circumference appear to account for the enhanced mucosal surface area following ICR. Flow cytometry demonstrated that significant increases in SP cells occur within 2-3 days following resection. By 7 days, ICR resulted in marked increases in crypt fission and Musashi-1 immunohistochemistry staining. Separate label-retention studies confirmed a 20-fold increase in BrdU incorporation 6 wk following ICR, confirming an overall increase in the number of ISC. These studies support that expansion of ISC occurs following ICR, leading to an overall increase number of crypts through a process of fission and intestinal dilation. Understanding the mechanism expanding ISCs may provide important insight into management of intestinal failure.
منابع مشابه
The human milk oligosaccharide 2'-fucosyllactose augments the adaptive response to extensive intestinal.
Intestinal resection resulting in short bowel syndrome (SBS) carries a heavy burden of long-term morbidity, mortality, and cost of care, which can be attenuated with strategies that improve intestinal adaptation. SBS infants fed human milk, compared with formula, have more rapid intestinal adaptation. We tested the hypothesis that the major noncaloric human milk oligosaccharide 2'-fucosyllactos...
متن کاملLong-term parenteral nutritional support and intestinal adaptation in children with short bowel syndrome: a 25-year experience.
OBJECTIVE To analyze the outcome of children with short bowel syndrome (SBS) who required long-term parenteral nutrition (PN). STUDY DESIGN Retrospective analysis of children (n=78) with SBS who required PN >3 months from 1975 to 2000. STATISTICS univariate analysis, Kaplan-Meier method, and Cox proportional regression model were used. RESULTS We identified 78 patients. Survival was bette...
متن کاملHeterogeneity of the Level of Activity of Lgr5+ Intestinal Stem Cells
Intestinal stem cells (ISCs) are a group of rare cells located in the intestinal crypts which are responsible for the maintenance of the intestinal homeostasis and intestinal regeneration following injury or inflammation. Lineage tracing experiments in mice have proven that ISCs can repopulate the entire intestinal crypt. It is noteworthy that in such experiments, only a subset of intestinal cr...
متن کاملComparison of Neonatal and Adult Mice-derived Sertoli Cells in Support of Expansion of Mouse Spermatogonial Stem Cells In vitro
متن کامل
Nutrition support of infants with short bowel syndrome.
Short bowel syndrome (SBS) is a clinically complex disorder resulting from alterations of normal intestinal anatomy and physiology and producing a variety of nutritional, infectious, and metabolic complications. It is usually defined functionally and is considered to be present when the patient has malabsorption in conjunction with a shortened small intestine.1 After resection, the residual sma...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- American journal of physiology. Gastrointestinal and liver physiology
دوره 293 5 شماره
صفحات -
تاریخ انتشار 2007