AIM: To study the effects of phosphorus-32 glass microspheres(^32P-GMS) on human hepatocellular carcinoma in nude mice. METHODS: Human liver cancer cell line was implanted into the dorsal subcutaneous tissue of 40 BAL...AIM: To study the effects of phosphorus-32 glass microspheres(^32P-GMS) on human hepatocellular carcinoma in nude mice. METHODS: Human liver cancer cell line was implanted into the dorsal subcutaneous tissue of 40 BALB/c nude mice. Then the 40 tumor-bearing BALB/c nude mice were allocated into treatment group (n=32) and control group (n=8). In the former group different doses of ^32P-GMS were injected into the tumor mass, while in the latter nonradioactive ^31P-GMS was injected into the tumor mass. The experimental animals were sacrificed on the 14th day. The ultrastructural changes of tumor in both treatment group and control group were studied with transmission electron microscopy (TEM) and stereology. RESULTS: In treatment group, a lot of tumor cells were killed and the death rate of tumor cells was much higher (35-70%). UItrastructurally, severe nuclear damage was observed in the death cells. The characteristics of appoptosis such as margination of heterochromatin was also found in some tumor cells. Besides, well differentiated tumor cells, degenerative tumor cells and some lymphocytes were seen. The skin and musde adjacent to the tumor were normal. In control group, the tumor consisted of poorly differentiated tumor cells, in which there were only a few of dead cells (5%). Stereologicl analysis of ultrastructral morphology showed that Vv of nuclei (53.31±3.46) and Vv of nucleoli (20.40±1.84) in the control group were larger than those (30.21±3.52 and 10.96±2.52) in the treatment group respectively (P<0.01), and Vv of RER (3.21±0.54) and Vv of mitochondria (4.53±0.89) in the control group were smaller than those (8.67±1.25 and 7.12±0.95) in the treatment group respectively (P<0.01, 0.05). Sv of the membrane of microvilli and canaliculi (27.12 um^2/100 um^3±11.84 um^2/100 um^3) in the control group was smaller than that (78.81 um^2/100 um^3±19.69 um^2/100 um^3) in the treatment group (P<0.01). But Vv of lipid particles (3.71±1.97) and Vv of vacuoles (5.72±1.58)were much larger than those (0.30±0.16 and 0.35±0.15) in the treatment group respectively (P<0.05, P<0.01). CONCLUSION: The experimental results indicate that local administration of ^32P-GMS can produce obvious effect on liver cancer cells and the anticancer effect of ^32P-GMS is directly proportional to the dose administrated. UItrastructural stereology can also show the effect of ^32P-GMS on the normalization of tumor cells, which is beneficial to the prognosis and treatment of patients. Moreover, local administrtion of ^32P-GMS is also safe.展开更多
Isotopic exchangeability of phosphorus in four Chinese soils with and without P application was studied by 32P and 33P double-labeling technique in relation to routine chemical extractions. The results showed that Bra...Isotopic exchangeability of phosphorus in four Chinese soils with and without P application was studied by 32P and 33P double-labeling technique in relation to routine chemical extractions. The results showed that Bray- Ⅰ and Bray-Ⅱ reagents could extract most of the fast exchangeable P. Not all of the Olsen-P belonged to fast exchangeable P, but it was about the same quantity of fast exchangeable P in a calcareous soil and a neutral soil without P application. Sequential fractionation of the soil phosphorus showed that most of the added radioisotopes in high P fixation red soils were tightly held by iron and aluminium oxides, which could be totally extracted only by 0.1M NaOH solution. In the neutral and calcareous soils most of the radioisotopes added were loosely held on the surface of soil particles and could be extracted by anion exchange resin. Phosphate application increased the resin-P fraction significantly for all the soils studied.展开更多
基金Supported by the Science and Technology commission of JiangsuProvince,No.B J93007 and Natural Science Foundation of JiangsuProvince,No.BK2001003
文摘AIM: To study the effects of phosphorus-32 glass microspheres(^32P-GMS) on human hepatocellular carcinoma in nude mice. METHODS: Human liver cancer cell line was implanted into the dorsal subcutaneous tissue of 40 BALB/c nude mice. Then the 40 tumor-bearing BALB/c nude mice were allocated into treatment group (n=32) and control group (n=8). In the former group different doses of ^32P-GMS were injected into the tumor mass, while in the latter nonradioactive ^31P-GMS was injected into the tumor mass. The experimental animals were sacrificed on the 14th day. The ultrastructural changes of tumor in both treatment group and control group were studied with transmission electron microscopy (TEM) and stereology. RESULTS: In treatment group, a lot of tumor cells were killed and the death rate of tumor cells was much higher (35-70%). UItrastructurally, severe nuclear damage was observed in the death cells. The characteristics of appoptosis such as margination of heterochromatin was also found in some tumor cells. Besides, well differentiated tumor cells, degenerative tumor cells and some lymphocytes were seen. The skin and musde adjacent to the tumor were normal. In control group, the tumor consisted of poorly differentiated tumor cells, in which there were only a few of dead cells (5%). Stereologicl analysis of ultrastructral morphology showed that Vv of nuclei (53.31±3.46) and Vv of nucleoli (20.40±1.84) in the control group were larger than those (30.21±3.52 and 10.96±2.52) in the treatment group respectively (P<0.01), and Vv of RER (3.21±0.54) and Vv of mitochondria (4.53±0.89) in the control group were smaller than those (8.67±1.25 and 7.12±0.95) in the treatment group respectively (P<0.01, 0.05). Sv of the membrane of microvilli and canaliculi (27.12 um^2/100 um^3±11.84 um^2/100 um^3) in the control group was smaller than that (78.81 um^2/100 um^3±19.69 um^2/100 um^3) in the treatment group (P<0.01). But Vv of lipid particles (3.71±1.97) and Vv of vacuoles (5.72±1.58)were much larger than those (0.30±0.16 and 0.35±0.15) in the treatment group respectively (P<0.05, P<0.01). CONCLUSION: The experimental results indicate that local administration of ^32P-GMS can produce obvious effect on liver cancer cells and the anticancer effect of ^32P-GMS is directly proportional to the dose administrated. UItrastructural stereology can also show the effect of ^32P-GMS on the normalization of tumor cells, which is beneficial to the prognosis and treatment of patients. Moreover, local administrtion of ^32P-GMS is also safe.
文摘Isotopic exchangeability of phosphorus in four Chinese soils with and without P application was studied by 32P and 33P double-labeling technique in relation to routine chemical extractions. The results showed that Bray- Ⅰ and Bray-Ⅱ reagents could extract most of the fast exchangeable P. Not all of the Olsen-P belonged to fast exchangeable P, but it was about the same quantity of fast exchangeable P in a calcareous soil and a neutral soil without P application. Sequential fractionation of the soil phosphorus showed that most of the added radioisotopes in high P fixation red soils were tightly held by iron and aluminium oxides, which could be totally extracted only by 0.1M NaOH solution. In the neutral and calcareous soils most of the radioisotopes added were loosely held on the surface of soil particles and could be extracted by anion exchange resin. Phosphate application increased the resin-P fraction significantly for all the soils studied.
