Chloroplast genomic characterization and phylogenetic analysis of Pellionia scabra / 生物工程学报

Pellionia scabra belongs to the genus Pellionia in the family of Urticaceae, and is a high-quality wild vegetables with high nutritional value. In this study, high-throughput techniques were used to sequence, assemble and annotate the chloroplast genome. We also analyzed its structure, and construct the phylogenetic trees from the P. scabra to further study the chloroplast genome characteristics. The results showed that the chloroplast genome size was 153 220 bp, and the GC content was 36.4%, which belonged to the typical tetrad structure in P. scabra. The chloroplast genome encodes 130 genes, including 85 protein-coding genes, 37 tRNA genes, and 8 rRNA genes in P. scabra. Among them, 15 genes contained 1 intron, 2 genes contained 2 introns, and rps12 had trans-splicing, respectively. In P. scabra, chloroplast genomes could be divided into four categories, including 43 photosynthesis, 64 self-replication, other 7 coding proteins, and 4 unknown functions. A total of 51 073 codons were detected in the chloroplast genome, among which the codon encoding leucine (Leu) accounted for the largest proportion, and the codon preferred to use A and U bases. There were 72 simple sequence repeats (SSRs) in the chloroplast genome of P. scabra, containing 58 single nucleotides, 12 dinucleotides, 1 trinucleotide, and 1 tetranucleotide. The ycf1 gene expansion was present at the IRb/SSC boundary. The phylogenetic trees showed that P. scabra (OL800583) was most closely related to Elatostema stewardii (MZ292972), Elatostema dissectum (MK227819) and Elatostema laevissimum var. laevissimum (MN189961). Taken together, our results provide worthwhile information for understanding the identification, genetic evolution, and genomics research of P. scabra species.

Characteristics and phylogenetic analysis of chloroplast genome of a new type of fruit Rubus rosaefolius / 生物工程学报

The genomic DNA of Rubus rosaefolius was extracted and sequenced by Illumina NovaSeq platform to obtain the complete chloroplast genome sequence, and the sequence characteristics and phylogenetic analysis of chloroplast genes were carried out. The results showed that the complete chloroplast genome of the R. rosaefolius was 155 650 bp in length and had a typical tetrad structure, including two reverse repeats (25 748 bp each), a large copy region (85 443 bp) and a small copy region (18 711 bp). A total of 131 genes were identified in the whole genome of R. rosaefolius chloroplast, including 86 protein coding genes, 37 tRNA genes and 8 rRNA genes. The GC content of the whole genome was 36.9%. The genome of R. rosaefolius chloroplast contains 47 scattered repeats and 72 simple sequence repeating (SSR) loci. The codon preference is leucine codon, and the codon at the end of A/U is preferred. Phylogenetic analysis showed that R. rosaefolius had the closest relationship with R. taiwanicola, followed by R. rubraangustifolius and R. glandulosopunctatus. The chloroplast genome characteristics and phylogenetic analysis of R. rosaefolius provide a theoretical basis for its genetic diversity research and chloroplast development and utilization.

The effects of radiofrequency heating on type Ⅱ collagen formation in the osteoarthritic knee / 中华物理医学与康复杂志

Objective To explore the effect of radiofrequency heating on type Ⅱ collagen expression in a rabbit model of osteoarthritis.Methods Knee osteoarthritis was induced in the right hind legs of 54 male rabbits using modified Hulth modeling.The rabbits were randomly divided into a model group which was not given any special treatment,a Lugua polypeptide group and a radiofrequency hyperthermia group.The Lugua polypeptide group was injected with Lugua polypeptide;the radiofrequency hyperthermia group was treated with radiofrequency irradiation.Six,12 and 18 days after the treatment,the morphological condition of the rats' right femoral medial condyle cartilages were evaluated using modified Mankins scoring and the type Ⅱ collagen content of the cartilage was detected using a quantitative PCR technique.Results At the same time points after treatment,the average Mankins scores were decreased in all the 3 groups,with that of the model group was significantly higher than those of both of the other groups,and the radiofrequency hyperthermia group's average score was significantly better than that of the Lugua polypeptide group.The average type Ⅱ collagen content was significantly increased in all the 3 groups to various extent (the radiofrequency hyperthermia group ＞ Lugua polypeptide group ＞ model group).For the radiofrequency hyperthermia group,the average Mankins score decreased significantly and the average type Ⅱ collagen content increased significantly as the treatment continued.Conclusion Radiofrequency hyperthermia is superior to Lugua polypeptide for treating knee osteoarthritis,at least in rabbits.Its therapeutic effectiveness may be related to a significant increase of type Ⅱ collagen in the cartilage.

The effect of radiofrequency-induced hyperthermia on the expression of IL-1 beta and TNF-alpha in the blood of rabbits with knee osteoarthritis / 中华物理医学与康复杂志

Objective To explore the effect of radiofrequency-induced hyperthermia on the morphology of articular cartilage and any changes in serum-1 interleukin-1 (IL-1β) and tumor necrosis factor-alpha (TNF-α) in the process of knee osteoarthritis in rabbits.Methods Fifty-four male rabbits were selected and knee osteoarthritis was introduced to their right hind limbs using the modified Huhh model.They were then randomly divided into a model group,a cervus and cucumis polypeptide (CCP) group and a radiofrequency thermotherapy (RT) group,each of 18.The CCP group was injected with deer melon peptide intramuscularly.The RT group was given radiofrequency hyperthermia treatment.The model group was not provided with any special treatment.On the 7th,13th and 19th day of the treatment,6 rabbits in each group were sacrificed to resect the right medial femoral condyle cartilage.The morphological characteristics of the cartilage were evaluated using the modified Mankins score,while the content of IL-1βand TNF-α in the serum were detected using enzyme-linked immuno-sorbent assays (ELISAs).Results At the same time points,the average Mankins score and the average content of IL-1βand TNF-α in the serum of the model group were significantly higher than in the CCP group,with the values in the latter group significantly higher than in the RT group.In the RT group,the average Mankins score,as well as the IL-1 beta and TNF-alpha levels in the serum,decreased significantly with longer treatment.Conclusion Radiofrequency-induced hyperthermia is superior to deer melon polypeptide in treating knee osteoarthritis,at least in rabbits.Its therapeutic mechanism may be related to the control of serum IL-1 beta and TNF-alpha levels.