This is a review of recent progress in the study on environment sensitive hydrogel based on cyclodextrin and their most recent and relevant applications in the intelligent drug delivery systems. Based on relevant literatures, the development of environment sensitive hydrogel responsive to physical, chemical and biochemical stimuli was introduced, involving their categorization, design principles, mechanism of action and potential application. Various new types of intelligent drug delivery system, which responds to various triggers, could be constructed by using the cyclodextrin-based environment sensitive hydrogel. They made it possible to control the drug release freely. Although these hydrogels are still at their research stage, they have attracted considerable interest in the intelligent drug delivery system.

Adenoviridae ; genetics ; Genes, p53 ; Genetic Therapy ; methods ; Genetic Vectors ; Humans ; Neoplasms ; therapy ; RNA Interference ; Tumor Suppressor Protein p53 ; genetics

AIM: To explore whether human telomerase reverse transcriptase (hTERT) antisense oligodeoxynucleotide (ASODN) could enhance the sensitivity of acute lymphoblastic leukemia cells from relapse patients to cisplatin. METHODS: The expression levels of hTERT protein were detected by immunofluorescence using fluorescence isothiocyanate (FITC), the number of viable cells was determined using the trypan blue dye exclusion assay, and apoptosis was detected by morphological observation and flow cytometric cell cycle analysis. RESULTS: The expression of hTERT protein was inhibited after treatment with hTERT ASODN. Treatment with cisplatin combined with hTERT ASODN had significantly reduced the number of viable acute lymphoblastic leukemic (ALL) cells (P<0.05). In morphological observation of apoptotic cells using Hoechst33258 and PI double staining techniques, cells displayed classic apoptotic changes in the presence of cisplatin or cisplatin combined with hTERT ASODN or ASODN at 48 h. Apoptotic rates of cells treated with cisplatin and ASODN were higher than that of cells treated with cisplatin alone (P<0.05). CONCLUSION: hTERT ASODN could increase sensitivity of cultured primary acute lymphoblastic leukemia cells from relapse patients to cisplatin.

Aiming at the unstable moral relationship between doctor and patient,the in-depth analysis and consideration were performed to factors influencing the harmonious relationship between doctor and patient,indicating that it was of great significance to the establishment of harmonious moral relationship between doctor and patient by taking the opportunity of new medical reform and making the best of antiseismic spirit.

A Review] The oncogene expression and growth of leukemic cells could be inhibited by antisense oligonucleotide. The selection of target genes is the key step in the research of antisense oligonucleotide on leukemia. The article would review the status and prospect of some target genes of leukemia in the investigation of antisense oligonucleotide.

AIM: To investigate whether antisense oligodeoxynucleotides of hTERT?bcl-2 and c-myc could enhance the sensitivity of leukemia cell K562 to cisplatin. METHODS: The inhibiting effects of cisplatin and cisplatin plus antisense oligodeoxynucleotide on K562 cells were determined by MTT. RESULTS: The inhibiting rate of 20 ?mol/L cisplatin to K562 cell is 17.17%?1.36% and it becomes 25.41%?1.77% ,26.18%?1.43% and 28.29%?1、05%, respectively, as combinated with antisense oligodeoxynucleotide of hTERT?bcl-2 or c-myc. CONCLUSION: These results indicated that antisense oligodeoxynucleotides of hTERT?bcl-2 and c-myc enhanced efficacy of cisplatin in K562 leukemic cells.

AIM: To observe the effect of antisense oligodeoxynucleotide of human telomerase reverse transcriptase(hTERT) on the telomerase activity in Jurkat cells and its mechanism. METHODS: The telomerase activity was detected by TRAP. hTERT protein and mRNA expressions were detected by flowcytometry and RT-PCR. RESULTS: The absorbency of the cells ( A values) was used to represent the telomerase activity. At 48 h and 72 h, the A values of the Jurkat cells treated with antisense oligodeoxynucleotide of hTERT decreased to 0.351?0.051 and 0.238?0.024, respectively, compared to the A value of 0.492?0.051 in the control cells without treatment ( P

Objective:To observe the clinical features of primary Sjgren syndrome(pSS) in young people(≤34 years).Methods: The data of 232 patients with pSS who were in hospital from 2004 to 2008 were analysed in a prospective study.Results: A total of 23.7%(55/232)patients' symptoms came on in youth(≤34 years),who were all females,mean age was(27.6?6.2) years.The other 177 patients' symptoms came on when they were more than 34 years old.In young group,32.73%(18/55) patients' first symptoms were xerostomia and/or keratoconjunctivitis sicca,the other 67.27%(37/55)came on without xerostomia and keratoconjunctivitis sicca,while in the middle-aged and aged group,59.32%(105/177)patients' first symptoms were xerostomia and/or keratoconjunctivitis sicca,40.67%(72/177)without xerostomia and keratoconjunctivitis sicca.There was significant difference(P=0.001).The duration from first symptom to first diagnosis of pSS in the young group was(93?107) months,which was significantly longer than those of the middle-aged and aged group [(45?59) months,P=0.001].The systemic damage of the young group was 61.8%(34/55),which was significantly greater than 41.24%(73/177)in the middle-aged and aged group(P=0.026).Conclusion: Primary Sjgren syndrome in young people is not rare,and about 2/3 of them come on without xerostomia and/or keratoconjunctivitis sicca.Not only the duration from first symptom to first diagnosis of pSS in the young group is longer,but also the systemic damage of the young group is greater than those of the middle-aged and aged group.These findings should alert the clinician to make the possible diagnosis of pSS in young patients.

Objective To investigate clinical characteristic of primary Sjogren's syndrome(pSS) with initial manifestations in the extra-gland organs. Methods Clinical data, including symptoms, laboratory parameters and complications of 85 pSS patients with initial manifestations of extra-gland organs hospitalized at the People's Hospital of Peking University during 2003 to 2006 were collected and analyzed retrospectively, as compared to those of pSS with xerophthalmia or xerostomia as initial ones. Results Mean time interval from onset to diagnosis in these patients with initial manifestations involved in the extra-gland organs was 94.5 months, higher than that in those with xerophthalmia or xerostomia as initial ones. Arthritis was manifested initially in 38 of the 85 patients (44.7 percent), peripheral leukopenia in 16 (18.8 percent), thrombocytopenia in nine (10.6 percent) and abnormal liver function in 13 (15.3 percent), respectively. Percentage of serum positive autoantibedies was higher in the patients with initial manifestation of the extra-gland organs than that in those with xerophthalmia or xerostomia as initial ones. Conclusions Initial manifestation of primary Sjogren's syndrome varies, and some patients can be initially involved in their extra-gland organs, with more proportion of arthritis than of other symptoms, and xerophthalmia or xerestomia could appear in them during the course of disease. And, xerophthalmia or xerostomia would not appear even as pSS was diagnosed in some other pSS patients. More attention should be paid to these clinical characteristics mentioned above in practice to avoid misdiagnosis.

Adolescent ; Anemia, Aplastic ; complications ; therapy ; Anemia, Hemolytic ; chemically induced ; complications ; Antilymphocyte Serum ; adverse effects ; therapeutic use ; Female ; Humans