OBJECTIVETo evaluate the role of p53 gene mutation in colorectal carcinoma and assess the value of peripheral blood p53 single nucleotide polymorphism (SNP) in early diagnosis of colorectal carcinoma.

METHODSNSP in axons 5-8 of p53 gene was detected using ligase detection reaction-polymerase chain reaction (LDR-PCR) in the peripheral blood of 100 patients with colorectal cancer and 100 healthy subjects.

RESULTSThe mutation rate of p53 gene was 24% (24/120) in colorectal carcinoma patients and 0% (0/120) in the healthy subjects (P<0.05).

CONCLUSIONp53 plays an important role in the carcinogenesis of colorectal carcinoma, and SNP analysis for p53 gene can be helpful in early diagnosis of colorectal carcinoma.

Adult ; Case-Control Studies ; Colorectal Neoplasms ; diagnosis ; genetics ; DNA Mutational Analysis ; DNA, Neoplasm ; genetics ; Early Detection of Cancer ; Female ; Humans ; Male ; Mutation ; Polymorphism, Single Nucleotide ; Tumor Suppressor Protein p53 ; genetics

Animals ; Cell Differentiation ; Female ; Hematopoietic Stem Cells ; cytology ; Hepatocytes ; cytology ; Male ; Mice ; Mice, Inbred BALB C

OBJECTIVETo determine whether the eukaryotic initiation factor-4E (eIF-4E) is involved in the cap-dependent translational regulation of heparanase and study the correlation between heparanase expression and metastatic potential of LS-174T cells.

METHODSThe protein and mRNA levels of inhibited eIF-4E were tested by Western blot and RT-PCR. Heparanase activity was defined as the ability to degrade high molecular weight (40-100 000) radiolabeled ((35)S) heparan sulfate (HS) substrate into low molecular weight (5-15 000) HS fragments. The invasive potential of tumor cells in vitro was observed by Matrigel invasion assay system.

RESULTSThe 20-mer antisense oligonucleotide (asODN) against eIF-4E specifically and significantly inhibited eIF-4E expression at both transcriptional and translational levels. The expression and the activity of heparanase were effectively lowered, which further decreased the invasive potential of LS-174T.

CONCLUSIONeIF-4E, probably being involved in translational regulation of heparanase in colon adenocarcinoma cell line LS-174T, can be a particularly interesting target for heparanase regulation, based on of its critical function.

Adenocarcinoma ; enzymology ; pathology ; Cell Line, Tumor ; Colonic Neoplasms ; enzymology ; pathology ; Eukaryotic Initiation Factor-4E ; antagonists & inhibitors ; genetics ; physiology ; Glucuronidase ; metabolism ; Humans ; Neoplasm Invasiveness

OBJECTIVEIsolation and expansion tumor spheres from colorectal cancer cell line Colo205 cultured in serum-free medium(SFM) supplemented with human recombinant EGF and bFGF.

METHODSColo205 cells were cultivated in SFM,while cells cultivated in serum-supplemented medium(SSM) served as the control. Cells morphology were observed by optical microscope, and expression of intestinal stem cells marker Musashi-1 was detected by immunocytochemical. To induce cell differentiation, tumour spheres were cultivated without EGF and bFGF in the presence of 10% serum. Then we analysed expressions of stem cell surface markers CD133 and CD44 among undifferentiated cell, post-differentiated cells and routine Colo205 cells under serum-supplemented culture condition by flow cytometry. At last we compared cell cycle and spectral karyotype between two groups.

RESULTSIn SFM consisting of EGF and bFGF, a minority of Colo205 cells could survive, proliferate and form the suspended tumor spheres. We detected high Musashi-1 expression in these cells. Compared with the SSM group and the post-differentiation SFM group, the expressions of CD133 and CD44 were significantly increased in the undifferentiated SFM group (P<0.05). There was no statistical difference in the expression of CD133 and CD44 between the post-differentiation SFM group and the SSM group (P>0.05). Cell cycle analysis indicated that tumor spheres were of a high proliferation state.We could not find any noticeable difference in the number of chromatosomes between the SFM group and the SSM group.

CONCLUSIONTumor spheres in which enriched cancer stem cells can be generated under serum-free culture condition with EGF and bFGF.

AC133 Antigen ; Antigens, CD ; metabolism ; Cell Culture Techniques ; methods ; Cell Line, Tumor ; Cell Proliferation ; Culture Media, Serum-Free ; Glycoproteins ; metabolism ; Humans ; Hyaluronan Receptors ; metabolism ; Neoplastic Stem Cells ; cytology ; metabolism ; Nerve Tissue Proteins ; metabolism ; Peptides ; metabolism ; RNA-Binding Proteins ; metabolism ; Spheroids, Cellular ; cytology

OBJECTIVE: To explore the clinical efficacy of percutaneous vertebroplasty(PVP) combined with nerve block in the treatment of lumbar osteoporotic vertebral compression fractures under the guidance of traditional chinese medicine "theory of equal emphasis on muscle and bone". METHODS: Total of 115 patients with lumbar osteoporotic vertebral compression fractures were treated by percutaneous vertebroplasty from January 2015 to March 2022, including 51 males and 64 females, aged 25 to 86 (60.5±15.9) years. Among them, 48 cases were treated with PVP operation combined with erector spinae block and joint block of the injured vertebral articular eminence (intervention group), and 67 cases were treated with conventional PVP operation (control group). The visual analogue scale(VAS) and Oswestry disability index(ODI) before operation, 3 days, 1 month and 6 months after operation between two groups were evaluated. The operation time, number of punctures and intraoperative bleeding between two groups were compared. RESULTS: The VAS and ODI scores of both groups improved significantly after operation compared with those before operation(P<0.05). Moreover, the VAS and ODI scores of 3 days and 1 month after operation of the intervention group improved more significantly than that of the control group(P<0.05). The difference of VAS and ODI scores before operation and 6 months after operation between two groups had no statistical significances(P>0.05). There was no statistically significant difference in the number of punctures and intraoperative bleeding between the two groups (P>0.05). CONCLUSION Based on the theory of "equal emphasis on muscles and bones", PVP combined with nerve block can effectively relieve paravertebral soft tissue spasm and other "muscle injuries", which can significantly improve short-term postoperative low back pain and lumbar spine mobility compared to conventional PVP treatment, and accelerate postoperative recovery, resulting in satisfactory clinical outcomes.
Male ; Female ; Humans ; Fractures, Compression/surgery* ; Vertebroplasty/methods* ; Spinal Fractures/surgery* ; Spinal Puncture ; Lumbar Vertebrae/injuries* ; Muscles ; Treatment Outcome ; Osteoporotic Fractures/surgery* ; Retrospective Studies ; Bone Cements