1: Chin J Physiol. 2006 Feb 28;49(1):31-8.
Erratum in:
Chin J Physiol. 2006 Apr 30;49(2):117.
Comparative proteomics of apoptosis initiation induced by 5-fluorouracil in
human gastric cancer.
Chen CY, Jia JH, Zhang MX, Zhou YB, Zhang RM, Yu XP.
Department of Microbiology, School of Medicine, Shandong University, Jinan
250012, Shandong, PR China.
5-Fluorouracil is the first choice chemotherapeutic drug for patients with
gastric cancer, but the mechanism that 5-fluorouracil plays the anti-tumor role
remains unclear. The aim of this study was to clarify correlated [corrected]
proteins induced by 5-fluorouracil in the apoptosis-initiation of human gastric
cancer (MGC-803) cells. The time point of apoptosis-initiation induced by
5-fluorouracil in MGC-803 cells was determinated using
5-fluorouracil-withdrawal. Two-dimensional electrophoreses (2-DE) were employed
to compare the differentials of protein expressions of the MGC-803 cells at the
apoptosis-initiation phase and those of the MGC-803 cells untreated with
5-fluorouracil. The differential proteins included 14 upregulated proteins and 8
downregulated proteins. They indicated a more-than-doubled alteration. These
proteins were digested in gels by trypsin and the mass of generated peptides
were measured by matrix assisted laser desorption ionization time of flight mass
spectrometry (MALDI-TOF-MS). The data obtained from peptide mass fingerprinting
(PMF) were searched out using the internet available database mascot
(
http://www.matrixscience.com). The results showed that proteomics analyses have
evidenced that many kinds of proteins are involved in the apoptosis initiation
of human gastric cancer MGC-803 cells. These proteins are related to metabolism,
oxidation, cytoskeleton and signal transduction and other aspects of cells. In
conclusion, the experiment model of apoptosis-initiation of human gastric cancer
MGC-803 cells induced by 5-fluorouracil based on proteomic analysis has been
established, giving an impetus to researches of the mechanism of apoptosis in
human gastric cancer, and laying a foundation for the selection of potential
drug precursors specific for inducing apoptosis-initiation in human gastric
cancer.
PMID: 16900703 [PubMed - indexed for MEDLINE]
2: Zhonghua Xue Ye Xue Za Zhi. 2004 Jan;25(1):13-6.
[Study of antileukemic effect of CpG-oligodeoxynucleotides treated cord blood]
[Article in Chinese]
Chen CY, Jia JH, Pan XL, Zhou YB, Zhao WM.
Department of Hematology and Oncology, the Second Hospital of Shandong
University, Jinan 250033, China.
OBJECTIVE: To observe the antileukemic effect of lymphocytes from cord blood
treated by CpG-oligodeoxynucleotides (CpG-ODN). METHODS: Lymphocytes from cord
blood were exposed to different oligodeoxynucleotides containing a panel of
CpG-ODN and were cultured with K562 cells. The cytotoxic effects were detected
by MTT method. Immunological markers of cord blood treated by CpG-ODN(3) which
showed highest activity were measured with flow cytometry. RESULTS: Different
CpG-motifs have different immunostimulatory activity and CpG-ODN(3) has the
highest one. After treated by CpG-ODN(3), NK killing activity to K562 cells
increased in a dose-dependent manner, and CD(3), CD(4), CD(19) and CD(56)
increased to (60.6 +/- 7.9)%, (40.2 +/- 3.5)%, (22.4 +/- 1.9)% and (15.5 +/-
3.1)%, respectively. CONCLUSION: CpG-ODN could reinforces the immunological
competence of cord blood lymphocytes and their effects on K562 cells. This
provides a new approach to reinforce the antitumor effects of cord blood.
PMID: 14990069 [PubMed - indexed for MEDLINE]
3: Zhonghua Xue Ye Xue Za Zhi. 2003 Dec;24(12):624-8.
[Comparative proteomics research of apoptosis initiation induced by
homoharringtonine in HL-60 cells]
[Article in Chinese]
Chen CY, Jia JH, Pan XL, Meng YS, Tu ZH.
Department of Hematological Malignancy, the Second Hospital of Shandong
University, Jinan 250033, China.
OBJECTIVE: To study the related proteins of apoptosis initiation induced by
homoharringtonine (HHT) in HL-60 cells. METHODS: After establishment of an
apoptosis initiation model induced by HHT in HL-60 cells, proteins of untreated
and HHT treated HL-60 cells were extracted, and the two-dimensional
polyacrylamide gel electrophoresis (2-DE) maps of the extracted proteins were
established by using the immobilized pH gradient (IPG) two-dimensional
electrophoresis respectively. The alteration protein spots were identified with
assisted laser desorption ionization time-of-flight mass spectrometry
(MALDI-TOF-MS) and database searching. RESULTS: Proteomics analysis showed that
proteins including MHC class I antigen, calbindin D-28K, chloride channel
protein 6, oncoprotein 18, zinc finger protein Helios and apoptosis inhibitor
like protein 2 were involved in apoptosis initiation induced by HHT. CONCLUSION:
The present study might conduce to the researches of HL-60 cells carcinogenesis
and pave the way to exploit drug precursor related to HHT and initiation of
apoptosis in HL-60 cells.
PMID: 14761608 [PubMed - indexed for MEDLINE]