title: [Studies on the lymphatic tropism and lymph cells apoptosis of cisplatin-nano carbon suspension in the rats].
abstract: OBJECTIVE
  To research the lymphatic tropism and lymph cell apoptosis of cisplatin-nano carbon suspension in rats with the aim of proposing a new way for chemotherapy.
  
  
  METHODS
  A total of 72 Wistar rats were randomly divided into two groups. For the experimental group, cisplatin-nano carbon suspension 0.3 ml (4 mg/ml) was injected subcutaneously into Wistar rats' plantar. For the control group, cisplatin 0.3 ml (4 mg/ml) was injected intravenously. Cisplatin concentration in the inguinal lymphatic tissue and plasma was determined by high performance liquid chromatography (HPLC) at 1, 2, 3, 4, 5 and 6 hours after drug administration. The apoptosis of lymph cell was detected by terminal deoxynucleotidyl transferase-mediated deoxyuridine triphosphate nick end labeling assay (TUNEL). Targeting ability were evaluated and compared by targeting index (TI), selecting index (SI) and relative extraction efficiency (RE). SPSS 17.0 statistical software was used to analyze the differentiation of the cisplatin concentration and apoptosis index (AI) among various groups. DAS software was used to evaluate the lymphatic tropism.
  
  
  RESULTS
  The cisplatin concentration of lymphatic tissue in experimental group were respectively (1.03± 0.32), (3.00±0.91), (2.20±0.73), (1.56±0.38), (1.30±0.74) and (0.78±0.34)µg/g after administration 1, 2, 3, 4, 5 and 6 hours, while in control group were (0.49±0.21), (1.02±0.70), (0.59±0.50), (0.56±0.21), (0.47±0.18) and (0.36±0.13)µg/g, in which there were significant difference at every times (all P < 0.05)except at 1 hour(P = 0.173). The cisplatin concentration in plasma were significant higher in the experimental group than those in the control group at various times(all P < 0.05), the former were respectively (0.57±0.28), (1.22 ± 0.45), (0.61 ± 0.18), (0.51 ± 0.13), (0.45 ± 0.13) and (0.40 ± 0.07) µg/ml, while the latter were respectively (3.12±0.33), (4.09±0.48), (2.56±0.38), (2.05±0.13), (1.81±0.28) and (1.44±0.40) µg/ml. Values of TI were respectively 2.12, 2.93, 3.73, 2.78, 2.76 and 2.19 and SI were 1.80, 2.45, 3.63, 3.07, 2.86 and 1.93. Value of RE was 2.86. The AI in experimental group were respectively (16.5±5.2)%, (30.2±2.8)%, (51.7 ± 4.3)%, (69.8 ± 3.2)%, (80.1 ± 4.3)% and (89.7 ± 8.5)% , while in control group were respectively(1.3±0.8)%, (2.4±1.7)%, (3.2±1.1)%, (3.9±2.6)%, (5.1±2.1)% and (6.3±2.3)%, in which there were significant difference at every points(all P < 0.05).
  
  
  CONCLUSIONS
  The nano carbon has the character of lymphatic tropism, and could send cisplatin to lymphatic tissue to achieve a higher concentration. The trait may break a new way for chemotherapy targeting lymph metastasis.
authors.affiliation: Department of Obstetrics and Gynecology, West China Secondary University Hospital, Chengdu 610041, China.
authors.forename: Minmin
authors.initials: M
authors.lastname: Hou
authors.forename: Zhuo
authors.initials: Z
authors.lastname: Chen
authors.forename: Li
authors.initials: L
authors.lastname: Li
authors.forename: Ping
authors.initials: P
authors.lastname: Wang
authors.affiliation: Email: qmrjzz@126.com.
authors.forename: Mingrong
authors.initials: M
authors.lastname: Qie
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000008:administration & dosage*; D017209:Apoptosis / Q000187:drug effects*; D002244:Carbon; D002853:Chromatography, Liquid; D002945:Cisplatin / Q000008:administration & dosage*; D020287:In Situ Nick-End Labeling / Q000379:methods*; D042601:Lymphatic Vessels; D008214:Lymphocytes; D051381:Rats; D017208:Rats, Wistar; D018523:Tropism / Q000187:drug effects*
chemical_list: D000970:Antineoplastic Agents; D002244:Carbon; D002945:Cisplatin