Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts: Gene/Protein Disease Symptom Drug Enzyme Compound   Target Concepts: Gene/Protein Disease Symptom Drug Enzyme Compound

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Query: EC:1.3.5.1 (succinate dehydrogenase)
8,177 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

In cells of human embryo skin--muscle tissue transformed by the Rouse sarcoma virus (23rd cell line) and polyoma virus (P-2 cell line), the mitotic activity was 48 0/00 for 23rd line, 51 0/00 for P-2 line as against 28 0/00 in the control cells. The transformed cells possessed greater amounts of RNA and DNA and protein--bound SH-groups, different forms of glycogen deposits, as well as higher acid phosphatase enzyme activities; there was practically no difference in acid mucopolysaccharide content or NAD-H2-diaphorase and succinate dehydrogenase activities.
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PMID:[Morphological and cytochemical characteristics of human cells transformed and made malignant by Rous and polyoma viruses]. 16 14

Asparate and alanine aminotransferase activity is approximately the same in different lobes of cerebral hemispheres of people with an uninjured central nervous system. The maximal activity of lactate, malate and succinate dehydrogenase is in the temporal lobes and thalami, the minimal one is in the corpus callosum. The activity of aminotransferases in the brain tumour lowers: in the dedifferentiated tumour the asparate aminotransferase shows a 23-24% decrease; in the case of the meningeal sarcoma it is 2.5 times as low: the activity of alaine aminogransferase is almost 10 times as low. The activity of malate dehydrogenase decreases in the neuroectodermal tumours and sharply (almost twice) in multiform glioblastoma. In the dedifferentiated meningiomas the activity of all the dehydrogenases is increased.
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PMID:[Aminotransferase and dehydrogenase activity in human brain tumours]. 22 26

The sunergic effects on sarcoma-180 (S-180) cells and on human malignant tumor cells between 1-hexylcarbamoyl-5-fluorouracil (HCFU), a lipophilic masked compound of 5-fluorouracil (5-FU), and hyperthermia were investigated. After the S-180 cells had been exposed to 77 microM of the drug for 3 days, with or without heat (43 degrees C) treatment for 2 hr, the succinate dehydrogenase (SD) activity was assayed to determine cell viability. The SD activity of S-180 cells treated with HCFU combined with heat decreased to about 7.8% of findings in the control cells. When the S-180 cells were implanted in a pad of the left posterior inferior foot of a mouse, the size of the tumor markedly decreased in case of exposure to HCFU and heat, compared with findings in other groups. Body weight of the mice remained stable after these procedures. Decrease in the SD activity of 6 human gastric cancers and 7 colorectal cancers exposed to HCFU combined with heat was compared with findings in the other groups. The SD activity markedly decreased when the cells were exposed to HCFU combined with heat. These results suggest that HCFU plus hyperthermia treatment is effective in the host with a malignancy and that the toxicity is minimal.
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PMID:Hyperthermia potentiates the cytotoxic activity of 1-hexylcarbamoyl-5-fluorouracil in sarcoma-180 cells and human malignant tumor cells. 177 28

The effects of oxygen concentration on the chemosensitivity of mouse sarcoma-180 (S-180) cells and human colorectal cancer tissues to mitomycin C (MMC) or carboquone (CQ) were determined in vitro, since evidence had been obtained that these drugs are more effective in HeLa cells. The results were as follows: (a) S-180 cells exposed to various concentrations of MMC or CQ for 2 h under conditions of normal aeration (about 20%) or hypoxia (5.0% and 0%) were then maintained under normal conditions of aeration for 3 days. Change of viability was assessed by succinate dehydrogenase (SD) activity. With exposure of the cells to MMC or CQ, under anoxic conditions (O2:0%), SD activity decreased to a greater extent than seen in the control cells. The value for CQ was from 61.5% to about 36.2%. (b) The decrease in the SD activity of 20 colorectal cancer tissues kept under conditions of anoxia was compared with findings under normally aerated conditions, following exposure to 30 microM of MMC or 1.6 microM of CQ. On exposure to MMC or CQ under anoxic conditions, SD activity decreased significantly, compared with normally aerated conditions (P less than 0.001 for MMC; P less than 0.05 for CQ). As colorectal cancer is less sensitive than other tissues to various chemotherapeutic agents, we recommend that MMC and CQ be prescribed to treat patients with these malignant lesions.
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PMID:Sarcoma-180 cells and human colorectal tumor cells under in vitro hypoxic conditions are more sensitive to mitomycin C and carboquone. 190 90

Sensitivity of various mouse tissues to heat was determined using mouse sarcoma-180 (S-180) cells and normal tissues: esophagus, stomach, small intestine, large intestine, liver, spleen, and kidney. The in vitro succinate dehydrogenase inhibition (SDI) test was used. The succinate dehydrogenase (SD) activity of tissue fragments was assayed, following exposure to a temperature of 43 degrees C (heat treatment) or 37 degrees C (control) for 1, 2, 5, or 10 hr. The sensitivity to heat treatment was estimated by the percentage of SD activity of the heat-treated cells, compared to that of the control cells. The decrease in SD activity following exposure to heat varied with the tissue. The SD activity decreased to a greater extent in the S-180 cells than in the normal tissues. In the normal tissues, the order of sensitivity to heat was stomach, spleen, large intestine, small intestine, esophagus, kidney and liver. These results show that hyperthermia is tissue selective, hence heat treatment of a malignant lesion should be carefully designed.
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PMID:Sarcoma-180 cells are more sensitive to heat than are mouse normal tissues: esophagus, stomach, small intestine, large intestine, liver, spleen, and kidney. 291 21

We compared the colorimetric reactions between the 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl 2H-tetrazolium bromide (MTT) assay and the succinate dehydrogenase inhibition (SDI) test, in order to evaluate the usefulness of the SDI test for in vitro chemosensitivity testing. The addition of sodium succinate enhanced the colorimetric absorbance at 565 nm in the MTT assay in a dose- and a time-dependent manner, in mouse sarcoma-180 (S-180) cells. At 10 microM of sodium succinate, a dose used in the SDI test, the absorbance of the MTT assay increased by about 2.5-fold in the S-180 cells and in 10 human tumor tissues. The absorbance in the SDI test correlated well with the viable cell number of S-180 cells (r = 0.9993). These results show that the SDI test, using MTT as a tetrazolium salt, has a higher sensitivity for predicting cell viability, compared to the MTT assay.
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PMID:Sodium succinate enhances the colorimetric reaction of the in vitro chemosensitivity test: MTT assay. 318 53

A case of a pure heterologous sarcoma of the uterine corpus composed exclusively of rhabdomyosarcomatous elements has been studied by multiple morphologic and biochemical techniques. The neoplasm filled the endometrial cavity and protruded out the cervical os, but the myometrium was only superficially invaded. The tumor did not extend outside the corpus. The pathologic features are discussed in detail. Evidence of striated muscle differentiation could be identified on light microscopic and ultrastructural examination. Immunoperoxidase staining of tumor cells with antibodies to myoglobin were positive. Histochemical preparations for lactate dehydrogenase, succinic dehydrogenase, and acid phosphatase were also positive in neoplastic cells. Other stains gave equivocal or negative results. These findings are discussed in comparison with previous reports.
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PMID:Characterization of a pure heterologous sarcoma of the uterus: rhabdomyosarcoma of the corpus. 635 68

The enzyme activities of lactate dehydrogenase (LDH), succinate dehydrogenase (SDH) and acid phosphatase (AP) in the rat sarcoma 45 (S. 45) cells and Walker carcinosarcoma (WCS) cells were estimated from the histochemical study. No significant changes were found in the histochemical reaction intensity during the tumour growth but at the late stage of WCS growth the LDH activity increased. WCS metastases were distinguished by the elevated enzyme activity of LDH as compared with the tumour. During the anticoagulant treatment the LDH and SDH activity in S. 45 and WCS cells falls, but the AP activity increases.
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PMID:[Metabolic study of sarcoma 45 and Walker carcinosarcoma cells during the process of growth and exposure to anticoagulants (an enzyme cytochemical analysis)]. 715 64

We studied the tumor host response to excessive doses of an anabolic steroid (nandrolone propionate, 2.5 mg 20 g intraperitoneally every second day for 11 days) with respect to body composition and tumor cell kinetics in MCG 101 sarcoma-bearing mice (C57BL/6J) with progressive cachexia. Although survival and food intake were not affected, a significant weight gain was observed that was essentially attributed to water retention. Net protein content was increased only to a minor extent (15%), of which only the liver accounted for a significant part of the body compartments. Hepatic protein accumulation was obviously caused by decreased protein degradation, since hepatic RNA content was unchanged. After anabolic steroid administration, reduced histochemical staining of succinate dehydrogenase was observed in skeletal muscles rich in oxidative type 1 fibers, but it was not different from that of tumor-bearing control animals, which was also confirmed by measurements of citrate synthase and cytochrome c oxidase activities in skeletal muscle and liver tissue. The anabolic steroid had no significant effect on tumor growth in terms of weight progression, energy state, polyamine synthesis rate, cell division rate, and cell cycle cytocompartments. We conclude that anabolic steroid supplementation is not therapeutically beneficial in counteracting progressive weight loss in experimental cancer.
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PMID:Effects of nandrolone propionate on experimental tumor growth and cancer cachexia. 772 66

The chemosensitivity of 43 human sarcoma tissues, including 18 osteosarcomas, 16 leiomyosarcomas and 9 liposarcomas, was compared with that of 28 adenocarcinomas of the stomach, using the in vitro succinate dehydrogenase inhibition (SDI) test. These tissues were exposed for 3 days to each antitumor drug, including adriamycin (ADM), 5-fluorouracil (5-FU), mitomycin C (MMC), cisplatin (CDDP), aclacinomycin A (ACR) and carboquone (CQ), them the cell viability was estimated based on the succinate dehydrogenase (SD) activity, determined using [3-(4,5-dimethyl-2-thiazolyl) -2,5-diphenyl-2H tetrazolium bromide] (MTT). SD activity was significantly lower in the osteosarcoma as compared to that in the adenocarcinoma, for ADM, MMC, CDDP, ACR and CQ (p < 0.01), and was higher for ADM (p < 0.05) in cases of leiomyosarcoma and for CDDP (p < 0.01) and ACR (p < 0.05) in cases of liposarcoma. The sensitivity rate was higher in osteosarcoma than in adenocarcinoma for ADM, MMC and CDDP. These findings suggest that patients with osteosarcoma will probably show a fairly good response to antitumor drugs, and that when liposarcoma or leiomyosarcoma tumors show resistance to antitumor drugs, then resection at the time of initial exploration and combined modalities, including radiation and hyperthermia, should be considered.
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PMID:Antitumor chemosensitivity differs between clinical sarcoma and adenocarcinoma tissues. 816 44


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