The unicellular red alga, Porphyridium , can be artificially cultivated. Some of very useful bioactive substances such as phycobiliproteins? polyunsaturated fatty acids (PUFA) and sulfated polysaccharides, which are synthesize by Porphyridium , have promising applications. This paper deals with the study of the character, production and application of Porphyridium.

Objective To compare the effects of point contact-dynamic compression plates (PC-DCP) and dynamic compression plates (DCP) on bone structure and mechanical properties of the plated bone in the intact goat tibia model. Methods Ten matured goats were used. The bilateral intact tibia of goats were fixed with DCP and PC-DCP respectively. The goats were sacrificed at 12 and 24 weeks after operation, and the tibiae were harvested. The structure of bone under plate was studied both by CT scan and histomorphology. The mechanical properties of the plated bone were examined by torsional test. Results At 12 weeks after internal fixation, there was obvious osteoporosis in the cortical bone underneath the plate in the DCP group compared with that of the PC-DCP group. Both of the cortical bone thickness underneath the plate and the torsion strength of the plated tibiae were significantly higher in the PC-DCP group than that in DCP group (P0.05). Conclusion The underlying bone resorption after rigid plate fixation is induced by both the disturbance of the bone blood supply and stress shielding. However, the former is the main cause in the early stage of fixation. PC-DCP is able to prevent bone resorption in the early stage of fixation.

Objective To compare the effects of point contact-dynamic compression plates (PC-DCP) and dynamic compression plates (DCP) on cortical bone blood flow in an intact sheep tibia model. Methods Fifteen mature goats were used in this experiment. After the bilateral tibia of goats were fixed with DCP and PC-DCP respectively, the regional cortical bone blood flow was measured at four time intervals (1 day, 2, 6 and 12 weeks after operation) using radiolabelled microsphere technique. Results After operation, the cortical bone blood flow was acutely decreased at the first day, kept lower than normal level until six weeks and recovered at the 12th week. The blood supply under PC-DCP recovered to normal, even over normal level two weeks after operation and remained at a high level until 12 weeks. Conclusions PC-DCP can markedly protect cortical bone blood flow.

Objective To study the inner diameter and hemodynamics of ophthalmic artery(OA)and central retinal artery(CRA)in hyperuricemia by Enhance-flow(eFlow)imaging and spectral Doppler.Methods One hundred and one patients with hyperuricemia and 30 volunteers were selected,the inner diameter in eFlow imaging and the peak systolic velocities(PSV),the end diastolic velocities(EDV),the resistive index(RI)were measured,and pulsatility index(PI)of OA and CRA were measured by spectral Doppler.The 101 patients were divided into two groups according to the time of diagnosing hyperuricemia,one group had a diagnosis of hyperuricemia for more than five years and the other had such a diagnosis for less than five years.The data were compared by t-test.Then,the patients were further divided into a group of hyperuricemia combined with hypertension and the other without hypertension.The differences between the experimental group and the group of volunteers were carried out by One-way ANOVA,the comparison between two groups were analyzed with SNK.Results The RI(0.68±0.09)and PI(1.3±0.4)of OA in patients who were diagnosed as hyperuricemia for more than 5 years was higher[RI:0.63±0.09,PI:1.1±0.3(t=3.504,P=0.001 ;t=3.164,P=0.002)],the EDV[(6±3)cm/s]of OA was lower than those patients with a diagnosis of hyperuricemia for less than 5 years[(8±5)cm/s,t=1.988,P=0.049].The PSV[(11.5±3.5)cm/s]and EDV[(3.7±1.1)cm/s]of CRA in hyperuricemia combination hypertension group was lower,and the RI (0.88±1.40)was higher than hyperuricemia without hypertension group[PSV:(13.5±4.0)cm/s,EDV:(4.1±1.2)cm/s,RI:0.67±0.08].Conclusion By eFlow and spectral Doppler,we have found that hyperu-ricemia could accelerate OA and CRA atherosclerosis.The eFlow and spectral Doppler are valuable methods to study the hemodynamics in ophthalmic artery of patients with hyperuricemia.

Objective To determine the dynamic change of serum procalcitonin (PCT) level after traumatic brain injury and the rclated clinical significance.Methods Serum levels of PCT and adrenocorticotropic hormone (ATCH) in 137 patients with traumatic brain injury and 20 normal volunteers were measured by electrochemiluminescence assay.Correlation between serum PCT level and severity of traumatic brain injury was evaluated.Results Percentage of serum PCT level at low inflammatory-risk threshold detected from day 1 to day 14 after admission was descended from 80.3％ to 63.5％.Meanwhile,the percentage of serum PCT level at high inflammatory-risk threshold was a rising-fall-rising trend,but the percentages of serum PCT level at median and definite inflammatory-risk thresholds showed sustained increase from 13.9％ to 27.0％ and 0.7％ to 3.7％ separately.Based on the Glasgow Coma Scale (GCS),the dynamic change of serum PCT level demonstrated a distinct bimodal pattern in severe injury group,a gradual falling after rising mode in middle injury group which was significantly and positively correlated with GCS (r =0.463,P ＜ 0.05),and a rising-falling-slight rising tendency in minorinjury group.In addition,the GCS in each group only closely related to the positive detections of serum PCT level detected at days 3 and 7 (x2 =10.32,16.31 respectively P ＜ 0.01).Serum ATCH level at day 1 was far higher than that at day 14 in severe injury group and was significantly higher in severe injurygroup compared with minor and middle injury groups (P ＜ 0.01 or 0.05).Conclusions Positive serum PCT may be predictive of the traumatic brain injury and injury degree within 3-7 days after the injury.The dynamic change of serum PCT is associated with the specialized mechanism of traumatic brain injury and neuronendocrine response,and it may be a useful parameter to assess posttraumatic stress response and prognosis.

Objective To study application of surface plasmon resonance(SIR)system in detection of clinical pathogen with a gene chip.Methods 27 clinical samples were detected by SPR-based gene chip system.These samples were composed by 8 positive blood samples,3 positive pyoid samples,9 positive leucorrhea samples and positive reproductive tract pyoid samples,1 positive biopsy sample and 6 negative biopsy samples.Specific primers and probes for target pathogens were designed by bioinformatics methods and validated by PCR and enzyme-labelled chemiluminescence,respectively.SPR-based gene chip was prepared and utilized to detect clinical samples by SPR system.Results The primers and probes showed good specificity and accuracy,which can be applied to perform PCR and application of the gene chip.Compared with the clinical analysis,gene chip analysis of 26 clinical samples showed the consistent results.Conclusions SPR detection system proved to be accurate and reliable.The chip will have a promising prospect in application.

Objective To explore the effects of low density lipoprotein(LDL) containing immune complexes(IC) on the mRNA expression of matrix metalloproteinase-1(MMP-1) and matrix metalloproteinase-1(TIMP-1) in U937 cells.Methods U937 cells were incubated with native LDL,oxidized LDL or LDL-IC,respectively.mRNA expression of matrix metalloproteinase-1(MMP-1) and tissue inhibitor of metalloproteinase-1(TIMP-1) in U937 cells were measured by reverse transcriptase polymerase chain reaction(PT-PCR).Results Normal U937 cells hardly expressed MMP-1,but highly expressed TIMP-1.N-LDL had no effect on the expression of MMP-1 and TIMP-1 mRNA.Ox-LDL can induce slightly expression of MMP-1 and markedly down-regulate expression of TIMP-1.Similarly,nature and oxidized LDL-IC had significantly more effect on the mRNA expressions of MMP-1 and TIMP-1 than that of control(P

The professional care by multi-disciplinary team and priority of prevention should be carried out in the treatment of diabetic foot disease to reduce diabetic amputation.This article describes the professional experience in the treatment of four complicated cases with diabetic foot disease and emphasizes the importance of the co-operation among different specialists,including diabetologists and wound,vascular,orthopedic surgeons,etc.as well as of varied therapies applied in staged management of the diabetic foot care,by treating these patients with diabetic foot disease as early as possible.

Objective To investigate the effect of endovascular treatment in iliac femoral artery occlusive disease of TransAtlantic Inter-Society Consensus (TASC) C,D lesions in elderly patients.Methods Totally 104 elderly TASC C,D patients with iliac femoral artery occlusion were treated,including TASC C (n =73),TASC D (n =31).Occlusive length range were 4.25-17.61 cm,with an average of (13.46±1.24)cm.The curative effect,complications and following up after surgery were analyzed.Results Ninty-four patients were treated successfully,and the technical success rate was 90.38％ (94/104);12 patients underwent balloon dilation,92 patients underwent balloon dilation combined stent.There were 8 cases (8/104,7.69 ％) with periprocedural complications,included arterial thrombosis (n =2),pseudoaneurysm (n=1),heart failure (n=4),and radiographic contrast nephropathy (n=1).Doppler ankle-brachial index increased from 0.32±0.12 to 0.81±0.11 (P＜0.01) at 1 week after treatment.The patency rates were 88.46 ％ (69/78) and 81.13％ (43/53) at 6 and 12 months followed-up respectively.Conclusion Minimally invasive endovascular treatment has high technical success rate,low complication rate,and satisfactory clinical curative effect for iliac femoral artery occlusive disease of TASC C,D lesions in elderly patients.

Objective: To investigate the effect of hormone replacement therapy on the uterine structure for patients with myoma of uterus in postmenopause. Methods: According to the method of treatment, 149 patients were divided into study group(73 cases) and control group(76 cases). The control group was given oryzanol, while the study group was given hormone replacement threapy (little dose of estradiol combined with dydrogesterone). The sex hormone levels(LH, FSH), uterine structure(volume of uterine fibroids, endometrial thickness, uterine volume) were compared. Results: The sex hormone levels of LH, FSH in the study group were (12.19±2.39)U/L, (13.14±5.29)U/L, respectively, which were lower than those in the control group[(15.09±3.18)U/L, (22.19±6.25)U/L], the differences were statistically significant (t=11.312, 10.583, all P<0.05). The volume of uterus fibroids, volume of uterine, endometrial thickness in the study group were (6.45±2.21)cm³, (45.56±24.17)cm³, (2.84±1.07)mm, respectively, which in the control group were (5.92±2.31)cm³, (38.25±20.52)cm³, (2.36±0.82)mm, respectively.Compared with the control group, the study group had bigger uterine and endometrial thickness, the differences were statistically significant(t=8.492, 7.954, all P<0.05), while the volume of uterus fibroids had no statistically significant difference between the two groups (t=1.043, P>0.05). Conclusion On the uretine structure of patients with myoma of uterus in postmenopause, compared with traditional oryzanol, hormone replacement can improve the status of uretus structure and function, and resist the side-effect of enlargement of the volume of uretus fibroids.There is significant advance for hormone replacement therapy on the uterine structure of patients with uretus fibroids in postmenopause.