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  • Glycogen  (1)
  • Immunohistochemistry  (1)
  • Key words: gastric cancer  (1)
  • 1
    ISSN: 1432-0568
    Schlagwort(e): Glycogen ; Glycogen phosphorylase ; Histochemistry ; Immunohistochemistry ; Human embryo
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract To elucidate the role of glycogen in the epithelium of developing digestive organs, we investigated the appearance of glycogen and glycogen phosphorylase (GP) in these organs. We studied 64 externally normal human embryos at Carnegie stages 13–23 (5.1–28.0 mm in crown-ramp length, 4–8 weeks of gestation) by histocytochemical staining for glycogen and immunohistochemical staining with antibodies against two isoenzymes of GP: brain-type (BGP) and mucle-brain-type (MBGP) GP. At stage 13, glycogen appeared in the epithelium of the digestive tract and the parenchyma of the pancreas. As development advanced, glycogen granules increased in number and size in these tissues, and they became evenly distributed in the epithelium of the digestive tract as either single particles or aggregates, as deduced by electron microscopy at late embryonic stages. Immunoreactivity specific both for BGP and for MBGP was detected in the digestive tract and the pancreas from stage 13. As development advanced, both BGP- and MBGP-immunoreactive cells increased in number and in immunoreactivity, and the number of MBGP-immunoreactive cells became larger than that of BGP-immunoreactive cells. By contrast, in hepatic cells, which serve as a major storage site for glycogen in adults, glycogen was detected only from stage 20, in smaller amounts, without formation of aggregates, and no immunoreactivity specific for BGP or MBGP was apparent throughout the embryonic stages examined. Thus, in the epithelium of the digestive tract and the parenchyma of the pancreas, but not in hepatic cells, the appearance and localization of GP coincided almost exactly with that of glycogen. These observations suggest that glycogen in the epithelium of the digestive tract and the parenchyma of the pancreas has not only been synthesized but also degraded from an early embryonic period and may, thus, be related to active cellular metabolism that is specific for embryonic development, including proliferation of the epithelium and interactions between epithelium and mesenchyme.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    ISSN: 1436-3305
    Schlagwort(e): Key words: gastric cancer ; neoadjuvant chemotherapy ; UFT
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Background. Neoadjuvant chemotherapy has become one of the topics of interest in chemotherapy of gastric cancer; the present study assessed the clinical benefits of neoadjuvant chemotherapy with oral uracil and futrafur (UFT) for gastric cancer. Methods. Between 1991 and 1997, 82 patients with gastric cancer (36 with early and 46 with advanced cancers) received UFT at 300–600 mg/day orally for 1–6 weeks before surgery. Objective responses, histological effects, and postsurgical survival rates were assessed. Results. In 69 of the 82 patients, the objective responses of the primary lesions were assessed by endoscopy or upper gastrointestinal series examination, and 2 complete responses (CR)s, 25 partial responses (PRs), and 42 no changes (NCs) were seen (39.1% response). Histological effects were evaluated in 82 patients, and 2 grade 3, 11 grade 2, 11 grade 1b, 27 grade 1a, and 31 grade 0 effects were seen. A longer period of UFT administration was associated with a CR or PR. However, the objective responses did not correlate with the histological effects. All the patients underwent gastrectomy, and during the median follow-up period of 41 months, 3-year survival rates were 97.1% for pTNM stage 1, 75% for stage 2, 86.7% for stage 3, and 41.6% for stage 4. The survival rates of stage 3 and stage 4 patients were higher than those of the historical controls in our department. However, CR or PR did not correlate with the improvement in survival. Side effects before surgery were not serious; they included slight myelotoxicity, liver dysfunction, and anorexia; however, 3 patients (3.7%) had suture insufficiency, 3 patients (3.7%) had methicillin-resistant Staphylococcus aureus (MRSA) enteritis, and 7 patients (8.5%) had liver dysfunction. Conclusions. Preoperative chemotherapy for gastric cancer with oral UFT was safe and resulted in a good local response (macro- and microscopically) which may indicate the possibility of improved survival with neoadjuvant chemotherapy with UFT. Furthermore, preoperative chemotherapy with oral UFT is easy and patients can receive this treatment on an outpatient basis.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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