Antineoplastic agents affect the healing of intestinal anastomoses. They often induce anorexia and diarrhea, possibly caused by morphological changes in the small intestinal mucosa. These changes were evaluated in the rat ileum. Animals in group I underwent only intestinal surgery while those in groups II and III underwent surgery on the third day of a 5-day course with cisplatin (in two different doses), bleomycin, and 5-fluorouracil. The parameters were: number of mitoses in crypts, crypt depth, villus height, width, and contour length, measured in the mucosa of primarily resected segments of the ileum and of the anastomotic area. Surgery yields an increased crypt depth and villus length in the anastomotic area without changing villus width. The changes in intestinal crypts precede those in villi. Antineoplastic drugs decrease crypt mitotic rate, villus height, width, and contour length. After cessation of antineoplastic chemotherapy mitotic activity increases. The shallower and shorter villi increase in width and length resulting in an increased villus contour length and area. A linear relation exists between villus contour length and villus height and width. Thus, antineoplastic polychemotherapy, dose-dependently, reduces and surgical trauma increases intestinal proliferative activity. However, the morphologic changes do not unequivocally explain possible metabolic disturbances causing retarded intestinal wound healing.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/0014-4800(92)90027-9 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Mending a World of Problems: 12-Year Review of Medical Tourism Inbound Complications in a Tertiary Centre.
Aesthetic Plast Surg
January 2025
Department of Plastic and Reconstructive Surgery, Rambam Health Care Campus, 8thHa'Aliya Hashniya st, Haifa, Israel.
Background: Medical tourism is a rapidly expanding multi-billion-dollar industry. Reduced costs, all-inclusive vacation packages that include cosmetic surgery, globalization, and affordable flight expenses have encouraged patients to seek aesthetic procedures in different countries. Cosmetic medical tourism is associated with high complication rates, such as severe infections, wound dehiscence, pain or discomfort, aesthetic dissatisfaction, and even death.
View Article and Find Full Text PDFDelivering Volumetric Hyperthermia to Head and Neck Cancer Patient-Specific Models Using an Ultrasound Spherical Random Phased Array Transducer.
Bioengineering (Basel)
December 2024
Department of Radiation Oncology, University of California, San Francisco, San Francisco, CA 94115, USA.
In exploring adjuvant therapies for head and neck cancer, hyperthermia (40-45 °C) has shown efficacy in enhancing chemotherapy and radiation, as well as the delivery of liposomal drugs. Current hyperthermia treatments, however, struggle to reach large deep tumors uniformly and non-invasively. This study investigates the feasibility of delivering targeted uniform hyperthermia deep into the tissue using a non-invasive ultrasound spherical random phased array transducer.
View Article and Find Full Text PDFKinetics of Macroion Adsorption on Silica: Complementary Theoretical and Experimental Investigations for Poly-l-arginine.
Langmuir
January 2025
Department of Chemical Engineering, Technion-IIT, Haifa 32000, Israel.
A comprehensive approach enabling a quantitative interpretation of poly-l-arginine (PARG) adsorption kinetics at solid/electrolyte interfaces was developed. The first step involved all-atom molecular dynamics (MD) modeling of physicochemical characteristics yielding PARG molecule conformations, its contour length, and the cross-section area. It was also shown that PARG molecules, even in concentrated electrolyte solutions (100 mM NaCl), assume a largely elongated shape with an aspect ratio of 36.
View Article and Find Full Text PDFPolydopamine-assisted ion-mediated hyaluronic acid grafting for effective construction of hemocompatible platform with cancer cell recognition.
Int J Biol Macromol
January 2025
MOE Key Laboratory of Bio-Intelligent Manufacturing, Liaoning Key Laboratory of Molecular Recognition and Imaging, School of Bioengineering, Dalian University of Technology, Dalian 116023, PR China. Electronic address:
Surfaces capable of specific biomolecule recognition are essential for cancer theranostics, biosensing, and tissue engineering. However, current grafting methods, critical for dictating the recognition efficiency and biocompatibility of biomaterials, especially hydrophilic polymers, struggle to balance high grafting density with ease of implementation. In pursuit of a simple, effective, and versatile solution, we introduced a polydopamine (PDA)-assisted Ca-mediated grafting strategy using hyaluronic acid (HA) as a model material.
View Article and Find Full Text PDFA mutant complement factor H (W1183R) enhances proteolytic cleavage of von Willebrand factor by ADAMTS-13 under shear.
J Thromb Haemost
January 2025
Department of Pathology and Laboratory Medicine, The University of Kansas Medical Center, Kansas City, KS 66160, USA; Institute of Reproductive Medicine and Developmental Sciences, The University of Kansas Medical Center, Kansas City, KS 66160, USA. Electronic address:
Background: A loss-of-functional mutation (W1183R) in human complement factor H (CFH) is associated with complement-associated hemolytic uremic syndrome; mice carrying a similar mutation (W1206R) in CFH also develop thrombotic microangiopathy but its plasma von Willebrand factor (VWF) multimer sizes were dramatically reduced. The mechanism underlying such a dramatic change in plasma VWF multimer distribution in these mice is not fully understood.
Objectives: To determine the VWF and CFH interaction and how CFH proteins affect VWF multimer distribution.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!