A B S T R A C T Bleomycin-induced pulmonary fibrosis in hamsters is associated with collagen accumulation that results from increased lung collagen synthesis rates. However, 1-2 wk after intratracheal instillation of bleomycin, lung collagen synthesis rates decline toward control values. To evaluate the potential role of the bronchoalveolar macrophage in regulating lung collagen production, we studied the effects of macrophages from normal and bleomycin-treated hamsters upon fibroblasts in vitro. We observed: (a) Medium from macrophage cultures decreased fibroblast [3H]thymidine incorporation and nondialyzable [3H]hydroxyproline production in a dose-dependent manner. Fibroblast cell counts were decreased in exposed cultures, and fibroblast viability was unchanged. Procollagen prolyl hydroxylation and prolyl-transfer RNA-specific activity were not altered by macrophage medium; this indicates that [3H]hydroxyproline reflects collagen production rate under the experimental conditions. (b) The suppressive effect of macrophage medium was selective for collagen since collagen production decreased more than noncollagen protein production. (c) Medium from bleomycin-treated hamster macrophages suppressed fibroblast proliferation and collagen production to a greater degree than medium from normal hamster macrophages. (d) Fibroblast suppression by macrophage medium was associated with increased fibroblast endogenous prostaglandin E2 production and intracel-A preliminary report of these studies was presented at the
SummaryBackground:Mucinous adenocarcinoma of the urinary bladder is a rare primary urologic disease, poorly responsive to radiation or chemotherapy as first-line treatment.Case Report:After trans-urethral resection of the bladder, a 62-year-old woman was diagnosed with mucinous adenocarcinoma of the urinary bladder. An upper gastro-intestinal endoscopy and a colonoscopy excluded any primary site of origin from those gastro-intestinal tracts. After whole-body CT staging scans, an anterior pelvectomy was performed, confirming a mucinous adenocarcinoma of the bladder, with no extra-vesical spreading. Some onco markers were sampled before surgery, and Ca 19-9 showed very high values, with a decreasing trend after pelvectomy. Six month after surgery, bilateral inguinal lymph node dissection was performed because of bilateral palpable masses – histologic examination showed a single metastatic node. The patient also received external radiotherapy of the inguinal area. Twenty-eight months after pelvectomy, the patient appears healthy.Conclusions:Early radical surgery with or without adjuvant radio-chemo-therapy appears to be the best option for mucinous adenocarcinoma of the bladder, and a good outcome is likely to be related with a confined disease and small tumor size. In addition, Ca 19-9 sampling proves to be useful in tumors that produce markers.
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