The strain of Cunninghamella echinulata 9980 was first selected with high aminoacylase activity . In three submerged cultures, the aminoacylase activity in the mycelial cell was compared . A number of factors have effects on the resolution reaction. The results showed that, peptone culture gave the highest aminoacylase activity with 680U/g.The optium temperature,pH,and substrate concentration were 55℃, 7.0,and 0.2mol/L,respectively. The ions in the buffer lowered the activity,but the Co~(2+) in 10~(-4)~10~(-3 )mol/L was necessary for its activity.

Mitogen-activated protein kinases (MAPKs) are important signaling transduction components well conserved in eukaryotes and play essential roles in various physiological, developmental and hormonal responses in plant. In the present study, a MAPK gene, designated as DoMPK4 (GenBank accession No. JX297597), is identified from a rare endangered medicinal orchid species D. officinale using the reverse transcription polymerase chain reaction (RT-PCR) and rapid amplification of cDNA ends (RACE) methods. The full length cDNA of DoMPK4 is 1 518 bp in length and encoded a 369 aa protein with a molecular weight of 42.42 kD and an isoelectric point of 5.55. DoMPK4 protein contained a serine/threonine protein kinase active site (158-170), a MAP kinase site (71-174), and eight conserved motifs. DoMPK4 had a transmembrane (214-232) but no signal peptide. Multiple sequence alignment showed that DoMPK4 shared high identities (74.9%-80.6%) with MAPK proteins from various plants. Phylogenetic analysis demonstrated that DoMPK4 belonged to group A of the MAPK evolutionary tree, and is closely related to monocots. Real time quantitative PCR (qPCR) analysis revealed that DoMPK4 is differentially expressed among the five organs including leaf, stem, root, seed, and protocorm-like body (PLB). The transcription level of DoMPK4 is the highest in the PLBs with 17.65 fold, followed by seeds, roots, and stems with 5.84, 2.28, and 1.64 fold, respectively. The progressive enhancement of DoMPK4 transcripts in the developing PLBs compared to that in the germinating seeds, suggests a role of DoMPK4 during the development of embryogenic PLBs formation in D. officinale.
Amino Acid Sequence ; DNA, Complementary ; genetics ; DNA, Plant ; genetics ; Dendrobium ; enzymology ; genetics ; Gene Expression Regulation, Plant ; Mitogen-Activated Protein Kinases ; genetics ; metabolism ; Phylogeny ; Plant Leaves ; metabolism ; Plant Proteins ; genetics ; metabolism ; Plant Roots ; metabolism ; Plant Stems ; metabolism ; Seeds ; metabolism ; Sequence Alignment

Peptide drugs exhibit an irreplaceable role in clinics due to their high specificity, efficiency and low toxicity. At present, more than 80 peptide drugs have been approved for marketing with global sales exceeding $50 billion in 2019. However, with large molecular weights, high hydrophilicity and instability in digestive tract, oral peptide drugs encounter substantial physiological barriers leading to low oral bioavailability. Therefore, peptide drugs are mostly administered by parenteral routes. Although parenteral delivery of peptide drugs achieves high bioavailability, this is associated with inconvenience and discomfort, even causing severe side effects compared with the oral route possessing a high degree of patient compliance. Therefore, numerous studies concentrate on novel strategies to improve the oral bioavailability of peptide drugs. Some delivery technologies such as Eligen™ and Axcess™ have been successfully applied to the oral dosage form of therapeutic peptides and have accelerated relevant oral formulations for Food and Drug Administration (FDA) approval and clinical treatment. In this review, we focus on the oral peptide delivery, mainly summarizing the progress of recent strategies used to overcome oral barriers and the commercialization applications of related patents, which could facilitate the research and development (R&D) of clinical applications of oral delivery techniques for peptide drugs.

Humans ; Moxibustion ; Depression ; Acupuncture Therapy ; Gastroesophageal Reflux ; Esophagitis, Peptic

OBJECTIVETo analyze and summarize clinical manifestation of hemolytic disease of the newborn (HDN) due to anti-M.

METHODSData of one case of HDN due to anti-M and the reports of 21 cases seen in the past 20 years at the home country were reviewed and analyzed.

RESULTSThere was an increasing number of reports of cases with HDN due to anti-M. Among the 22 cases, four were the first fetus. Of 18 infants, ten were male, and eight were female. The blood group was MN in 19/21 infants, and was M in 2/21 infants. The blood group was N in 10/21 mothers, and was NN in 11/21 mothers. Among the 18 infants, the direct antiglobulin test of 7 infants were positive, of 4 infants were dubiously positive, and of 7 infants was negative. Among the 16 infants, the antibody release test of 13 infants was positive, and of 3 infants were negative. Among 17 infants, the free antibody test of all was positive. Among the 21 mothers, the anti-M of IgG were positive in all mothers, and along with IgM in 11 mothers. The anti-M of IgG was positive in all infants. Mild or severe anemia and icterus were found in all cases. Among the 15 cases, jaundice was evident on the 1st day of life in 11 cases. Among 13 cases, marked elevation of both indirect- and direct-reacting bilirubin levels was reported in 4 cases. Phototherapy was applied when jaundice became evident. High-dose intravenous immunoglobulin was given to 4/15 cases. Exchange transfusion were performed in 8 of 22 cases. Three cases died, and 19 cases were cured.

CONCLUSIONHDN of varying degrees of severity has been reported in association with anti-M and can even lead to intrauterine deaths or requiring treatment with exchange transfusion. If the mother has a history of prior intrauterine deaths, abortion, hydrops fetalis, severe fetal anemia or infertile, MN blood group and anti-M antibodies should be tested after excluding the possibility of other causes and HDN due to ABO or Rh blood group incompatibility. As the efficacy of phototherapy increases, the role of exchange transfusion in acute management is rapidly decreasing. High-dose intravenous immunoglobulin and/or intramuscular metalloporphyrins may further reduce the need for exchange transfusion. The exchange transfusion may be performed through peripheral arterial (drawn out) and venous (infused in) lines.

ABO Blood-Group System ; Erythroblastosis, Fetal ; Female ; Humans ; Immunoglobulin G ; immunology ; Infant, Newborn ; Male ; Rh-Hr Blood-Group System

OBJECTIVETo investigate the displacement and stress distribution of upper incisors in three-dimensional (3D) space controlled by step-shaped vertical closing loop.

METHODSThe maxillary teeth and alveolar bone of a volunteer with normal occlusion were scanned with 3D spiral CT. Modeling and calculation were only carried out on right upper central incisor, lateral incisor and their alveolar bone in order to simplify the procedures. A 3D finite element model of archwire-brackets-upper incisors and periodontal tissues was developed using Ansys finite element package. Finally, a 3D finite element model of archwire-brackets-upper incisors and periodontal tissues was established based on mirror symmetry principle. The displacement of maxillary incisors and stress distribution in periodontal tissues were analyzed.

RESULTSWhen step-shaped vertical closing loop was simply drew back 1 mm, the maximum displacement of upper central incisor in labial and lingual direction were 5.29 × 10(-2) and 0.71 × 10(-2) mm; 10.47 × 10(-3) and 10.20 × 10(-3) mm in gingival and occlusal direction, 10.26 × 10(-3) and 1.63 × 10(-3) mm in medial and distal direction; the maximum displacement of upper lateral incisor in labial and lingual direction were 3.31 × 10(-2) and 0.41 × 10(-2) mm, 10.52 × 10(-3) and 5.10 × 10(-3) mm in gingival and occlusal direction, 6.29 × 10(-3) and 4.64 × 10(-3) mm in medial and distal direction, the displacement trend of them were moving lingually and gingivally similar to bodily movement. The stress peach of upper central incisor, periodontal ligament and alveolar bone were 31.35, 2.52 and 4.64 MPa, the stress peach of upper lateral incisor, periodontal ligament and alveolar bone were 19.59, 1.28 and 4.12 Mpa, the stress distribution of them were similar and the periodontal ligament buffered the stress imposed on the tooth.

Alveolar Process ; physiology ; Dental Stress Analysis ; Finite Element Analysis ; Humans ; Imaging, Three-Dimensional ; Incisor ; physiology ; Maxilla ; physiology ; Models, Biological ; Periodontium ; physiology ; Stress, Mechanical ; Tomography, Spiral Computed ; Tooth Crown ; physiology ; Tooth Migration ; Tooth Movement Techniques ; instrumentation ; methods

BACKGROUND: A study combined medical CT technology and digital three-dimensional (3D) interactive control system Mimics software and computer simulation software tools for 3D reconstruction and simulation reconstruction of the femur. Customized individualized femoral prosthesis has high matching degree with human body structure, and has high application value in clinical research. OBJECTIVE: To investigate the application value of 3D simulation of femoral prosthesis in artificial femoral prosthesis replacement. METHODS: Totally 82 cases, who received femoral prosthesis replacement from July 2014 to June 2016 in Taihe Hospital of Shiyan, were enrolled and randomly assigned to three groups: personalized group (n=28), cementless group (n=27) and cemented group (n=27). Different types of femoral prosthesis were designed in each group. 3D model reconstruction in femur was designed using medical CT technology combined with computer. Prosthesis implantation was simulated in computer, and the relevant information was recorded. Simulated operation was conducted on the mechanical experiment of femoral prosthesis in the biped and single foot loads so as to provide the most suitable operation plan. The possible risk was forecasted and assessed for preoperative preparation. RESULTS AND CONCLUSION: (1) In the simulation of mechanical experiment, under double foot and single foot loads, after prosthetic replacement, stress in the femur was significantly better in the personalized group than in the cementless group and cemented group (P <0.05). (2) After replacement, normal stress and shear stress were significantly better in the personalized group than in the cementless group and cemented group (P < 0.05). (3) The initial, horizontal and vertical micromovement was significantly better in the personalized group than in the cementless group and cemented group (P < 0.05). (4) In summary, the use of computer technology and 3D CT software can make individualized femoral prosthesis for patients. Compared with the cementless and cemented prostheses, personalized prosthesis has obvious advantages in stress distribution, interface stress and initial micromovement.

Objective: To observe the effect of electroacupuncture (EA) at Huantiao (GB 30) and Weizhong (BL 40) on thigmesthesia, gait function, and expression levels of serum immunoglobulin G (IgG) and immunoglobulin M (IgM) in rabbits with lumbar intervertebral disc herniation (LIDH). Methods: Forty healthy New Zealand rabbits were randomly divided into a blank control group, a model group, an EA at acupoint group and an EA at non-acupoint group, with 10 rabbits in each group. The LIDH pathological model of rabbit was established using the self-made LIDH model maker. The thigmesthesia and gait function of rabbits were recorded by Siegal method. The serum IgG and IgM expression levels were detected by enzyme-linked immunosorbent assay. Results: EA at Huantiao (GB 30) and Weizhong (BL 40) could improve the clinical symptoms of thigmesthesia and gait function, and inhibit the expressions of serum IgG and IgM in the LIDH rabbits, which were significantly different compared with those in the model group and EA at non-acupoint group. Conclusion: EA at Huantiao (GB 30) and Weizhong (BL 40) can improve the clinical symptoms of LIDH rabbits, which is associated with inhibition of the serum IgG and IgM expressions and reduction of the immunoinflammatory factor release. This may be one of the mechanisms of EA at Huantiao (GB 30) and Weizhong (BL 40) in the treatment of LIDH.

Adult ; Aged ; Animals ; Female ; Humans ; Kidney Calculi ; surgery ; Male ; Middle Aged ; Nephrostomy, Percutaneous ; instrumentation ; methods ; Pyonephrosis ; surgery ; Swine ; Swine, Miniature ; Ultrasonography, Interventional

OBJECTIVETo investigate the feasibility of treatment for calculous pyonephrosis with first stage percutaneous nephrolithotomy under the standard access.

METHODSThirty-six cases of calculous pyonephrosis and 36 cases of urolithiasis with no pyonephrosis were treated by percutaneous nephrolithotomy. In the nephrostomy, the caliber was dilated to F24. All the operations were preformed through the EMS lithotrity system. The intrapelvic pressure was detected in the operation. The hemoculture before and after operation, the germi culture of urine, and the temperature and blood leucocyte changes after operation were recorded. All the patients were treated by antibiotics before and after the operation.

RESULTSAll the patients were treated successfully. The average intrapelvic pressure were 23.2 cmH(2)O in non-pyonephrosis group and 22.8 cmH(2)O in pyonephrosis group. Both of the groups had 1 case of transient bacteremia after the operation. No significant difference was found in the other indices between the two groups.

CONCLUSIONEMS lithotrity system is safe and feasible for treating calculous pyonephrosis with stage I percutaneous nephrolithotomy via the standard access.

Adolescent ; Adult ; Aged ; Endoscopy ; Female ; Humans ; Kidney Calculi ; surgery ; Male ; Middle Aged ; Nephrostomy, Percutaneous ; methods ; Pyonephrosis ; surgery ; Treatment Outcome ; Young Adult