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Osteosarcomas were induced in approximately 80% of young New Zealand Black rats by the intratibial inoculation of Moloney murine sarcoma virus from day 1 to day 5 after birth. The neoplasms were composed of a spectrum of well-differentiated to poorly differentiated osteoblasts, osteocytes, and
The effect of the potent tumor promoter phorbol 12-myristate 13-acetate (PMA) on collagen synthesis, a differentiated property of chick embryo fibroblasts, was examined. Collagen synthesis, as measured by the rate of formation of [3H]hydroxyproline from [3H]proline, was found to be decreased in
It has been proposed that a cysteine proteinase inhibitor (CPI) found in the ascitic fluid of Sarcoma 180 tumor-bearing mice is a kind of kininogen (Itoh, N., Yokota, S., Takagishi, U., Hatta, A., and Okamaoto, H. (1987) Cancer Res. 47, 5560-5565). The first 40 NH2-terminal residues and 54 residues
Many surgeons think that cancer causes a higher incidence of wound complications. Wound healing was examined in a cutaneous and deep model in control and sarcoma-bearing rats to evaluate this concept. In a dorsal incisional wound, a significant decrease in wound breaking strength was observed from
The insoluble collagen from methylcholanthrene induced sarcoma was isolated and characterized. It contains more glycine, hydroxyproline and acidic amino acids than normal connective tissue collagen. An anionic character of tumour collagen was stated (pI 6.1). No typical collagen subunits in this
In order to demonstrate a collagenolytic enzyme in a tumor, solid Tawa sarcoma was subjected to a tissue culture technique. Salt- and acid-soluble collagen used as substrate was extracted from the rat skin and tail tendon. The tumor mass used was obtained on the 5th, 8th, and 11th days after
Adjuvant radiation therapy by the brachytherapy technique has been suggested by us to diminish local recurrence following resection of extremity and superficial truncal soft-tissue sarcoma. However, loading of the catheters with radioactive sources on the first through the fifth postoperative days
Rat fibrosarcoma induced by subcutaneous injection of methylcholanthrene was found to contain at least three different types of collagen. Two of them were identified as type I and type III collagens, the third (fraction B) seems to be specific for this tumour. The ratio of type I to type III
BACKGROUND
Captopril, an angiotensin-converting enzyme inhibitor, used for treating hypertension and heart failure, inhibits angiogenesis in the corneas of rats in response to basic fibroblast growth factor, slows the growth of experimental tumors in rats, and leads to the regression of Kaposi's
The objective of the present work has been to study some aspects of bone and intestinal compartments in rats with Walker 256 carcinosarcoma, an experimental model of humoral hypercalcemia of malignancy (HHM). The results have been compared to those obtained in control animals and, also, to those
Paget's disease usually is found in patients past the age of 40. Early presenting symptoms include headache, deafness, tinnitus, and pain due to radicular compression. The diagnosis is confirmed by radiographic features and elevated levels of serum alkaline phosphatase and urinary hydroxyproline.
Osteosarcomas were produced by the intratibial inoculation of New Zealand black rats with Moloney sarcoma virus (MSV) at 1 day and 4 days of age. Radiographic evidence of osteosarcoma development was first demonstrated at 10 to 15 days postinoculation in both groups. Subsequent radiographic and
Paget's disease of bone seems to be a slow virus infection of a single or several areas of the skeleton. Pagetic lesions are rather common among elderly people, but the disease does not manifest itself very often. Compared to the incidence of Paget's disease in England it seems to be rarer in this
Many papers were published on both Paget's disease and fibrous dysplasia during the past year. In Paget's disease, evidence for a generalized, probably viral disorder of the skeleton has been adduced, although focal radiologic features dominate the clinical picture. Unusual clinical manifestations
An experimental model in rats for comparison of bone repair under normal and pathological conditions is described. The low cost of rats and the simple surgical procedure used allow large-scale studies. Although clinical implications must be interpreted with care, our model may prove useful in the