Objective:To evaluate the effect of Kuntai capsules combined with progestin-primed ovarian stimulation (PPOS) protocol on the ovarian response, laboratory parameters and embryo transfer outcomes of expected poor ovarian response (POR) patients undergoing invitro fertilization/intracytoplasmic sperm injection (IVF/ICSI) cycles. Methods:A retrospective cohort study was performed at Center for Reproductive Medicine, Jiangxi Maternal and Child Health Hospital from June 2020 to July 2023. A total of 1 733 expected POR patients were enrolled and divided into the PPOS only group (control group) and the Kuntai capsules combined with PPOS regimen group (trial group). After a 1∶1 propensity score matching, 423 cases were included in each group. Further analyses and comparisons were made between the two groups, concerning the ovarian stimulation outcomes, embryo laboratory parameters and pregnancy rates after the first frozen-thawed embryo transfer cycles. The primary outcome measure was the number of oocytes retrieved.Results:No statistically significant difference was found in baseline characteristics after matching between the two groups (all P>0.05). Compared with control group, the number of oocytes retrieved did not differ significantly in the trial group ( P=0.295). The level of luteinizing hormone (LH) on the trigger day [3.3 (2.2, 5.0) U/L], the number of available blastocysts formed [1 (0, 1)] and the available blastocyst formation rate [46.2% (85/184)] in the trial group were significantly higher than those in control group [2.9 (1.9, 4.5) U/L, P=0.004; 0 (0, 1), P=0.034; 30.0% (48/160), P=0.002]. However, there were no significant differences in the duration and dosage of gonadotropin used, progesterone and estradiol levels on the trigger day, incidence of premature LH surge, number/rate of fertilized oocytes, number/rate of cleaved embryos, number/rate of high-quality embryos, as well as rate of unavailable embryos (all P>0.05). Compared with control group, the trial group demonstrated comparable implantation rate, clinical pregnancy rate, early miscarriage rate, ongoing pregnancy rate and live birth rate after the first frozen-thawed embryo transfer cycles (all P>0.05). Conclusion:Compared with the PPOS only regimen, the combination of Kuntai capsules and PPOS did not increase the number of oocytes retrieved but could increase the number and rate of available blastocysts formed in expected POR patients.

Objective:To evaluate the effect of Kuntai capsules combined with progestin-primed ovarian stimulation (PPOS) protocol on the ovarian response, laboratory parameters and embryo transfer outcomes of expected poor ovarian response (POR) patients undergoing invitro fertilization/intracytoplasmic sperm injection (IVF/ICSI) cycles. Methods:A retrospective cohort study was performed at Center for Reproductive Medicine, Jiangxi Maternal and Child Health Hospital from June 2020 to July 2023. A total of 1 733 expected POR patients were enrolled and divided into the PPOS only group (control group) and the Kuntai capsules combined with PPOS regimen group (trial group). After a 1∶1 propensity score matching, 423 cases were included in each group. Further analyses and comparisons were made between the two groups, concerning the ovarian stimulation outcomes, embryo laboratory parameters and pregnancy rates after the first frozen-thawed embryo transfer cycles. The primary outcome measure was the number of oocytes retrieved.Results:No statistically significant difference was found in baseline characteristics after matching between the two groups (all P>0.05). Compared with control group, the number of oocytes retrieved did not differ significantly in the trial group ( P=0.295). The level of luteinizing hormone (LH) on the trigger day [3.3 (2.2, 5.0) U/L], the number of available blastocysts formed [1 (0, 1)] and the available blastocyst formation rate [46.2% (85/184)] in the trial group were significantly higher than those in control group [2.9 (1.9, 4.5) U/L, P=0.004; 0 (0, 1), P=0.034; 30.0% (48/160), P=0.002]. However, there were no significant differences in the duration and dosage of gonadotropin used, progesterone and estradiol levels on the trigger day, incidence of premature LH surge, number/rate of fertilized oocytes, number/rate of cleaved embryos, number/rate of high-quality embryos, as well as rate of unavailable embryos (all P>0.05). Compared with control group, the trial group demonstrated comparable implantation rate, clinical pregnancy rate, early miscarriage rate, ongoing pregnancy rate and live birth rate after the first frozen-thawed embryo transfer cycles (all P>0.05). Conclusion:Compared with the PPOS only regimen, the combination of Kuntai capsules and PPOS did not increase the number of oocytes retrieved but could increase the number and rate of available blastocysts formed in expected POR patients.

Enzyme is an efficient and green biocatalyst, and widely used in many areas. Immobilized enzyme is superior to its free form in a variety of properties. Enzyme immobilization studies started in the 1970s in China. Till now, immobilized enzymes are widely applied in the fields of food, medical, energy, environmental management, among others. However, there are still some defects such as no universal method and the high cost. Therefore, based on the relatively mature traditional immobilization technologies, efforts have been made to innovate immobilization technologies. As a result, many new immobilization technologies focusing on new carriers and methods are continuously generated. Coupling with more than ten years' study on enzyme immobilization, we present here recent development and application of new immobilization technologies, as well as suggestions to future development of immobilization technology.

Objective: To explore the value of nanoparticles (CN) in lateral cervical lymph node mapping in papillary thyroid carcinoma using carbon. Methods: Thyroid cancer patients with suspicious lymph node metastasis but without typical signs of metastatic disease from March 2016 to November 2017 in Fudan University Shanghai Cancer Center were prospectively included in the cohort. Neck dissection was performed in all patients (compartmentsⅡ-Ⅴ). Suspicious lateral lymph node metastasis was identified using pre-operative ultrasound or computed tomography. CN were used for lymph node mapping during surgery. Results: A total of 70 surgeries were performed in 67 patients, among which 57 were found to have lateral lymph node metastasis (81.4%). The median number of CN-dyed lateral lymph nodes was 6. Compartment IV had the highest number of CN-dyed positive lymph nodes as well as the highest rate of metastasis, followed by compartmentⅢ. In compartmentsⅢandⅣ, the incidence of lymph node metastasis was significantly higher in the CN-dyed group than in the CN-undyed group (P<0.001). When the final pathology of neck dissection was set as the gold standard, lateral CN-dyed lymph node biopsy was found to have a sensitivity of 86.0%; its negative predictive value was 61.9% and its overall accuracy was 88.6%. Conclusions:Injection of CN during surgery was a potential method of mapping lateral lymph nodes in papillary thyroid carcinoma. CompartmentⅢ-ⅣCN-dyed lymph node biopsy had a satisfactory sensitivity and thus, served as a reasonable range for lymph node biopsy.

Objective To analyze crossed cerebellar diaschisis(CCD) after subacute phase of spontaneous cerebral hemorrhage(SPSCH)and it's relevant factors with whole-brain CT perfusion(CTP) imaging. Methods Eighty-six patients diagnosed with unilateral SPSCH by CT were prospectively enrolled in our study from July 2015 to October 2016. Whole-brain CTP was performed in each patient.Cerebral blood flow(CBF), cerebral blood volume(CBV), mean transit time(MTT)and time-to-peak(TTP) inipsilateral and contralateral cerebellum were manually measured.The asymmetric indexs(AIs) were also calculated. Moreover, the volume of hematoma, the maximumarea of peri-hematomahypoperfusionin CBF and clinical factors(age, gender, time intervals from symptom onset)were analyzed,and NIHSS scores were used to evaluate the neurological status before patient admission, inspection, and discharge.CCD was rated positive when a unilateral supratentorial hematomawas appeared and an accompanying perfusion decrease was showed in the contralateral cerebellum on at least two sequential slices of CTP maps.All the individuals were divided into two groups including CCD-positive groupand CCD-negative group. The perfusion parameters (CBF, CBV, MTT, and TTP)between the contralateral and ipsilateral cerebellum were analyzed by the two-tailed paired t-test in CCD-positive group. The differences in the perfusion and clinical variables between the two groups were analyzed by the independent sample t-test and the Chi-squared test. Therelationships between the AI values and clinical or radiologic variables were assessed with Pearson correlation test. Results We found 35 CCD positive cases and 51 negative cases in the 86 patients.In CCD-positive groups, the perfusion values of cerebellumipsilateral and contralateral to the hematomawere as follows:CBF were (40.88±11.23) vs. (33.91±9.96) ml·100 g-1·min-1, CBV were (3.30±1.18) vs. (2.75±1.13) ml/100 g and TTP were (22.09±3.98) vs. (22.88±4.15) s, respectively, and there was statistical significance (t=10.231,8.223,-2.883,P<0.05).In CCD positive group, CBF, CBV, TTP, and MTT of the contralateral cerebellar hemisphere was changed in 35, 32, 26, and 16 cases,respectively.The AI value of CBF(AICBF)in CCD-positive group was (17.10±9.10)%, which was higher than that in the negative group (-0.95±17.01)%, there was statistical significance(t=6.367,P<0.05).The AI value of CBV(AICBV)was (17.43 ± 11.65)% in CCD-positive group, also significantly higher than that in negative group which was (1.55±21.06)%(t=4.477, P<0.05). No statistical difference(P>0.05)was found in hematoma location,hematoma volume, supratentorialhypoperfusion area and NIHSS scores(at admission, inspection)between CCD-positive and negative groups.The AICBF and AITTP showed linear correlation with time intervals in CCD-positive patients(P<0.05). Conclusions CCD is a common phenomenon in patients with SPSCH.Of all the perfusion parameters,CBF abnormalities are more common.The severity of CCD has a certain correlation with time intervals.There is no significant correlation between CCD and the clinical or radiological data(age, NIHSS scores,hematoma volume, and supratentorial hypoperfusion area).

Objective To summary the microsurgical strategies and techniques of petroclival meningiomas by trans-subtemporal combined with suboccipital retrosigrnoid keyhole approaches to raise the removal rate and improve the prognosis.Methods The clinical data of consecutive 26 patients with petroclival meningiomas,admitted to our hospital from January 2011 to December 2015 and accepted microsurgical treatment,were reviewed retrospectively;7 of them were guided by neuronavigation,8 were performed under neuroelectrophysiological monitoring,and 11 were guided by neuronavigation combined intraoperative MRI or neuroelectrophysiological monitoring.The operative methods and techniques,tumor resection rate and Kamofsky performance scale (KPS) scores before and after operation were analyzed.Results Of all patients who underwent surgical treatment by trans-subtemporal combined with suboccipital retrosigmoid keyhole approaches,gross total tumor resection (Simpson Ⅰ-Ⅱ) was achieved in 23 patients (88.5％),subtotal (Simpson Ⅲ-Ⅳ) in 3 patients (1 1.5％).Six patients (23.1％) had cranial nerve deficit postoperatively.No mortality which related with operation was noted.Patients were followed up for 3-35 months,23 patients had KPS scores ≥70,and 3 patients had KPS ＜70;no tumor recurrence or progression was noted.Conclusion The trans-subtemporal combined with suboccipital retrosigmoid keyhole approaches are safe,effective and minimally invasive for resection of petroclival meningiomas;mastering the operation strategies and intraoperative skills is conducive to improve the efficacy of surgery.

Objective:With the development of modern skull base minimally invasive technology mature and neural radio surgery techniques,it is necessary to re-examine the therapeutic strategy for the treat-ment of petroclival meningiomas.To sum up the operative experience and methods in microsurgical resec-tion of petroclival meningiomas by the combining trans-subtemporal and suboccipital retrosigmoid keyhole approach.To explore the minimally invasive operation approach of petroclival meningiomas,to raise the removal degree and to improve the postoperative result using this approach.Methods:The clinical data of the consecutive 21 patients with the petroclival meningiomas were reviewed retrospectively.The meth-od,degree of tumor resection,techniques of the combining keyhole approach,Karnofsky performance score (KPS)before and after operation were also analyzed.The neuronavigation guided operation was performed in 9 cases,and 12 cases were operated in the neuroelectrophysiological monitoring.Results:Total excision of the tumor resection (Simpson,Ⅰ -Ⅱlevels)was conducted in 18 cases (85.7%,18 /21),and 3 patients underwent close resection (Simpson Ⅲ level,14.3%,3 /21).Postoperative three-dimensional CT showed good lock bone flap restoration;Postoperative pathology confirmed meningioma. Postoperative cranial nerve dysfunction or new original nerve dysfunction were aggravated in 5 cases (23.8%),including transient trochlear nerve (3 cases),abducent nerve (1 case),and the motor branch of trigeminal nerve paralysis (1 case).Abducent nerve paralysis (1 case)appeared,with hearing impairment.After the 3-month follow-up,11 cases had the same KPS aspreoperation,7 cases improved,and 3 cases not improved.The KPS score was 77.14 ±23.12 on average,and there was no statistically significant difference compared with that before operation (P >0.05 ).The postoperative follow-up for half a year showed fluent speaking and writing in 19 cases (KPS 70 or higher),and general recovery in 2 cases (KPS <70).The postoperative follow-up for 3 -29 months showed no tumor recur-rence or progress.Conclusion:The combining trans-subtemporal and suboccipital retrosigmoid keyhole approach is simple,safe,and minimally invasive,and an ideal operation approach of petroclival menin-gioma.To master the operation skills and the intraoperative matters needing attention in the operation,is favorable to improve the resection rate and curative effect.

Purpose The diagnosis, treatment and prognosis of benign and malignant biliary stricture are significantly different. This study aims to evaluate the quantitative analysis of biliary structures using magnetic resonance cholangiopancreatography (MRCP) combined with dynamic contrast enhanced CT (DCE-CT).Materials and Methods The quantitative parameters of MRCP and DCE-CT imaging data from 27 patients with benign biliary stricture (benign group) and 30 patients with malignant biliary stricture (malignant group) were retrospectively analyzed. The wall thickness, stricture length and diameter, proximal ductal dilatation and degree of enhancement in two groups were compared, and its correlation was analyzed to evaluate the accuracy of MRCP and DCE-CT.Results There were significant differences in wall thickness [(3.2±2.0) mmvs (2.1±0.6) mm], stricture length [(15.8±8.1) mmvs (9.5±6.5) mm] and diameter [0 mmvs (2.0±0.9) mm], proximal ductal dilatation and the degree of enhancement [(12.7±3.6) mmvs (9.3±2.7) mm] between the two groups (t=2.825, 3.270, 4.025,P<0.001;Z=-3.909,P<0.001). Multivariable stepwise regression analysis showed that the wall thickness and diameter, and the CT HU in portal venous and equilibrium phases combined with CT plain scanning were significant predictors of malignant biliary strictures (t=-6.424-2.309,P<0.05). The sensitivity, specificity, inter-modality agreement and Youden index of MRCP and DCE-CT in diagnosing 57 patients with biliary stricture were 96.67%, 100.00%, 98.25% and 0.97, respectively; with statistical significance in predicting benign and malignant biliary stricture (AUC=0.994,P<0.001).Conclusion Using MRCP and DCE-CT, the wall thickness and diameter of the stricture, and the difference in CT HU in portal venous and equilibrium phases combined with CT plain scanning are valuable in differential diagnosis of benign and malignant biliary stricture.

Objective To summarize the experience of microsurgical treatment of posterior fossa epidermoid cyst in nearly five years,and to explore the effect of endoscopic assisted microsurgical treatment on posterior fossa epidermoid cysts.Methods A retrospective analysis of 49 patients with posterior fossa epidermoid cysts,admitted to our hospital from January 2008 to January 2013,was conducted.The controls were 20 patients treated only by micro-neurosurgery,and the other 29 were as observation subjects:the tumors were,first,mostly removed under micro-neurosurgery,and then,residual tumors were resected under neuroendoscopy.The operation time,complications and tumor residual rate were compared between the two groups.Results According to the different tumor location in posterior fossa,three surgical approaches were adopted:suboccipital posterior midline approach,suboccipital posterior sigmoid sinus approach and supratentorial infratentorial combined approach.Postoperative complications were aseptic meningitis,transient cranial nerve palsy and delayed intracranial hematoma.There was statistical significance between two surgical methods in residual tumor rate and incidence of complications (P＜0.05),while no statistical significance in operation time was noted between the two groups (P＞0.05).Conclusion With the assistant of neuroendoscopy,tumor removal rate of posterior fossa epidermoid cyst would be improved obviously and the incidence of complications would be decreased.

To enhance biohydrogen production of Klebsiella sp. HQ-3, the global transcriptional factor (Fnr), formate dehydrogenase H (FDH1) and the pncB gene encoding the nicotinic acid phosphoribosyltransferase (NAPRTase) were for the first time over-expressed in Klebsiella sp. HQ-3. The fnr, fdhF, pncB genes were cloned from the genomic DNA of Klebsiella sp. HQ-3 by 3 pairs of universal primers, and introduced into the corresponding sites of the modified pET28a-Pkan, resulting in the plasmids pET28a-Pkan-fnr, pET28a-Pkan-fdhF and pET28a-Pkan-pncB. The 4 plasmids were then electroported into wild Klebsiella sp. HQ-3 to create HQ-3-fnr, HQ-3-fdhF, HQ-3-pncB and HQ-3-C, respectively. Hydrogen production was measured using a gas chromatograph and the metabolites were analyzed with a high-performance liquid chromatograph (HPLC). The results indicate that over-expression of fnr, fdhF and pncB significantly enhanced hydrogen production in the three recombinant strains. Hydrogen production per mol glucose for HQ-3 fnr, HQ-3 pncB, HQ-3 fdhF was 1.113, 1.106 and 1.063 mol of hydrogen/mol glucose, which was respectively increased by 12.26%, 11.62% and 7.28% compared with that of the control strain HQ-3-C (0.991 mol of hydrogen/mol glucose). Moreover, the analysis of HPLC showed that the concentrations of formate and lactate were markedly decreased, but succinate remained unchanged in culture media compared with those of the control strain HQ-3-C.
Fermentation ; Formate Dehydrogenases ; biosynthesis ; genetics ; Hydrogen ; metabolism ; Iron-Sulfur Proteins ; biosynthesis ; genetics ; Klebsiella ; genetics ; metabolism ; Metabolic Engineering ; methods ; Metabolic Networks and Pathways ; Pentosyltransferases ; biosynthesis ; genetics