The Value of Umbilical Cord Blood Erythrocyte Index in the Screening of Neonatal Thalassemia / 中国实验血液学杂志

OBJECTIVE@#To investigate the relationship between umbilical cord blood erythrocyte index and thalasse-mia, and reveal its clinical value in the screening of thalassemia in neonates.@*METHODS@#2 919 cases of umbilical cord blood from neonatal who were born in Boai Hospital of Zhongshan Affiliated with Southern Medical University from July 2017 to December 2018 were collected, the routine blood tests were preformed to detect the umbilical cord blood. Thalassemia gene in peripheral blood of neonates was collected. The cut-off values of cord blood indexes were determined, and the sensitivity, specificity and other evaluation indexs were calculated.@*RESULTS@#Among the cord blood in 2 919 neonates, 314 cases were detected out as thalassemia(positive rate: 10.76%). The average level of RBC and RDW in 2 605 children with non-thalassemia was lower than those with 314 children with thalassemia. The levels of Hb, MCV, MCH, MCHC, HCT, Hb/RBC and MCV/RBC in children with non-thalassemia were higher than those with thalassemia, and there were significant differences in the neonates between the two groups. The RBC and RDW levels of neonates in the α-thalassemia group were higher than those in the non-thalassemia group, while the levels of Hb, MCV, MCH, MCHC, HCT, Hb/RBC and MCV/RBC of neonates were lower than those in the non-thalassemia group. The levels of MCV, MCH and Hb/RBC of neonates in the β-thalassaemia group were lower than those in the non-thalassaemia group. The levels of MCV, MCH, Hb/RBC, and MCV/RBC of neonates in the complex thalassemia group were lower than those in the non-thalassemia group. When the cut-off value of MCV was set to 106.05 fl, the sensitivity was 0.548, and the specificity was 0.907, the specificity was the highest among all indexes. The area under the ROC curve of the combined diagnosis of MCH+MCV/RBC was the largest(0.807), the sensitivity was 0.710, the specificity was 0.841, the positive predictive value was 0.348, and the negative predictive value was 0.960.@*CONCLUSION@#The single indicator of umbilical cord blood red blood cells has advantages and disadvantages for the screening of thalassemia, but the combination of MCH+MCV/RBC can improve the accuracy of the screening or diagnosis of thalassemia, it also has a positive effect to the reduction of the birth rate of children with thalassemia major, which showed a high popularization value in primary hospitals.

Effect of Siwu Paste on Hematopoietic Function of Bone Marrow in Rats with Aplastic Anemia and Its Mechanism / 中国实验方剂学杂志

Objective:To explore the regulatory effect of Siwu paste on the bone marrow hematopoietic function of aplastic anemia （AA） model rats. Method:SD rats were randomly divided into normal control group， model group， positive drug （Fufang E'jiao Jiang 10.8 g·kg^-1） group， high-dose Siwu paste （22.68 g·kg^-1） group and low-dose Siwu paste （5.67 g·kg^-1） group. Acetophenazine （APH） combined with cyclophosphamide （CTX） injection was used to establish the aplastic anemia rat model. The administration groups were given the corresponding drugs （<italic>ig</italic>） for 15 consecutive days. The levels of white blood cells （WBC）， red blood cells （RBC）， hemoglobin （HGB）， hematocrit （HCT） and platelets （PLT） in peripheral blood cells of rats were detected， thymus and spleen indexes were calculated and compared. Enzyme-linked immunosorbent assay （ELISA） was used to detect the levels of interleukin-3 （IL-3） and interleukin-6 （IL-6） in rat serum. The pathological changes of bone marrow were observed by hematoxylin eosin （HE） staining. Western blot and Real-time fluorescence quantitative polymerase chain reaction （Real-time PCR） methods were used to detect Toll receptor 4 （TLR4） and nuclear transcription factor-<italic>κ</italic>B （NF-<italic>κ</italic>B） protein and gene expression in rat femoral bone marrow cells. Result:Compared with the normal control group， the WBC， RBC， HGB， HCT and PLT levels of the model group were significantly reduced， the thymus index was significantly decreased， the spleen index was significantly increased， the serum IL-3 level was significantly decreased， and the IL-6 level was significantly increased. The number of neutrophils and megakaryocytes in the femoral bone marrow was reduced， and the medullary cavity was filled with edema fibrofatty tissue. The expressions of TLR4 and NF-<italic>κ</italic>B protein and mRNA in bone marrow cells were significantly increased （<italic>P</italic><0.01）. Compared with the model group， the levels of WBC， RBC， HCT and PLT in peripheral blood cells of rats in the high-dose Siwu paste group increased， the thymus index increased， the spleen index decreased， the IL-3 level was significantly increased， the IL-6 level was significantly decreased， the pathological morphology of femoral bone marrow was slightly improved， and the expressions of TLR4 and NF-<italic>κ</italic>B protein and mRNA in bone marrow cells decreased significantly （<italic>P</italic><0.05， <italic>P</italic><0.01）. Conclusion:Siwu paste may improve the bone marrow hematopoietic function of rats with aplastic anemia by regulating the expression of the bone marrow inflammation signal pathway TLR4/NF-<italic>κ</italic>B.

Mechanism Analysis of Bianketong Tablet in Treatment of Constipation-predominant Irritable Bowel Syndrome Based on Network Pharmacology and Bioinformatics / 中国实验方剂学杂志

Objective:To explore the potential mechanism of Bianketong tablet （BKT） in the treatment of constipation-predominant irritable bowel syndrome （C-IBS） based on network pharmacology and bioinformatics. Method:The BKT-meridian network was constructed for analyzing the combined effect of the nine Chinese herbs in BKT. The active components and targets of BKT were collected from the Traditional Chinese Medicine Systems Pharmacology Database and Analysis Platform （TCMSP） and then screened according to the oral bioavailability （OB） and drug likeness （DL） criteria. Following the acquisition of C-IBS target set from GeneCards， Online Mendelian Inheritance in Man （OMIM）， Drugbank and DisGeNet， the protein-protein interaction （PPI） network was constructed. Cytoscape 3.7.2 was utilized for network visualization. The screened key targets were subjected to gene ontology （GO） and Kyoto Encyclopedia of Genes and Genomes （KEGG） enrichment analysis using DAVID platform. The C-IBS mouse model was established via intragastric administration of ice water， and the key targets of BKT against C-IBS were verified by enzyme linked immunosorbent assay （ELISA） and immunohistochemistry. Result:The large intestinal meridian was the main site where BKT acted. There were 70 potential active components in BKT， which acted on 227 intersection targets. Through T helper cell 17（Th17） differentiation， Toll-like receptor （TLR）， tumor necrosis factor and other signaling pathways， BKT participated in inflammatory response， immune regulation， intestinal nerve regulation， hormonal regulation， and oxidative stress response， thus exerting the therapeutic effects against C-IBS. As reveled by <italic>in vivo</italic> experiments， BKT significantly improved the small intestinal propulsion rate， up-regulated the expression of vasoactive intestinal peptide （VIP） in serum and colon tissue of C-IBS mice， and down-regulated the expression of nuclear transcription factor-<italic>κ</italic>B （NF-<italic>κ</italic>B）， interleukin（IL）-6， and TLR2 in serum and colon tissue， which confirmed the reliability of integration analysis. Conclusion:BKT inhibits C-IBS via multiple components， multiple targets， and multiple pathways. This study has provided ideas for further clinical research and experimental verification of BKT in the treatment of C-IBS.

Study on Addition and Subtraction Syndrome Differentiation Method of Huanglian Ejiaotang and Baihe Dihuangtang in Regulation of Neuroendocrine Network for Menopausal Syndrome / 中国实验方剂学杂志

Objective:To observe the clinical efficacy of addition and subtraction syndrome differentiation method of Huanglian Ejiaotang and Baihe Dihuangtang in the treatment of menopausal syndrome （MPS） and symptoms of deficiency of yin and hyperactivity of fire， and investigate its regulation effects on neuroendocrine network. Method:One hundred and forty-eight patients were divided into control group （74 cases） and observation group （74 cases） according to the random number table method. The patients in control group received estradiol/norethisterone acetate tablets， 3 mg/time， 1 time/day， while the patients in observation group received addition and subtraction of Huanglian Ejiaotang and Baihe Dihuangtang based on the same western medicine treatment as control group， orally 1 dose/day， with a treatment course of 3 months in both groups. Kupperman index （KI） score was evaluated before treatment and at 1 month， 2 months and 3 months after treatment. The Menopausal Quality of Life （MENQOL）， self-rating depression scale （SDS）， Self-rating Anxiety Scale （SAS）， Pittsburgh Sleep Quality Index （PSQI） and score of deficiency of yin and hyperactivity of fire were evaluated before and after treatment. The levels of serum estradiol （E2）， follicle stimulating hormone （FSH）， luteinizing hormone （LH）， norepinephrine （NE）， 5-hydroxytryptamine （5-HT）， nitric oxide （NO）， endothelin-1 （ET-1） and calcitonin gene-related peptide （CGRP） were detected before and after treatment. Result:The clinical efficacy in observation group was better than that in control group （Z=2.115， P<0.05）， and the KI scores in observation group at 1 month， 2 months and 3 months after treatment were lower than those in control group （P<0.01）， and the decrease of KI score in observation group after treatment was larger than that in control group （P<0.01）. The scores of various dimensions of MENQOL scale in observation group were lower than those in control group （P<0.01）. The scores of deficiency of yin and hyperactivity of fire， SAS， SDS and PSQI in observation group were all lower than those in control group （P<0.01）， and the level of E2 in observation group after treatment was higher than that in control group （P<0.01） ，while the levels of FSH and LH were lower than those in control group （P<0.01）.The levels of 5-HT and NE in observation group were higher than those in control group （P<0.01）.The NO level in observation group was higher than that in control group （P<0.01）， while the levels of CGRP and ET-1 were lower than those in control group （P<0.01）. During the study period， there were 5 drop-out cases， 2 excluded cases， and 67 completed cases in the control group. There were 7 drop-out cases， 1 excluded case， 66 completed cases in the observation group. Conclusion:On the basis of hormone replacement therapy， addition and subtraction of Huanglian Ejiaotang and Baihe Dihuangtang for patients with MPS （with symptom of deficiency of yin and hyperactivity of fire） can improve clinical symptoms， relieve depression and anxiety， improve sleep quality and enhance quality of life， and its clinical efficacy is superior to hormone replacement therapy alone. It can also regulate endocrine hormones， vasomotor factors and monoamine neurotransmitters， thereby improving clinical symptoms.

Clinical observation on herb-partitioned spreading moxibustion at Baliao points plus climen for diminished ovarian reserve / 针灸推拿医学（英文版）

Objective: To observe the clinical efficacy of herb-partitioned spreading moxibustion at Baliao points plus climen for diminished ovarian reserve (DOR). Methods: A total of 60 patients with DOR were randomized into a spreading moxibustion group and a Western medicine group by the random number table method, with 30 cases in each group. The Western medicine group was treated with climen, starting from the 5th day of the menstrual cycle for 21 d. The spreading moxibustion group was treated with herb-partitioned spreading moxibustion at Baliao points on the basis of the medication in the Western medicine group, 1 h per time, once a week. The treatment was performed for 1 month as one treatment course in both groups, for 3 courses in total. The serum follicle-stimulating hormone (FSH), luteinizing hormone (LH) and estradiol (E2) in the patients were measured before and after treatment. The peak systolic velocity (PSV) and resistance index (RI) were also detected. The traditional Chinese medicine (TCM) symptom score was evaluated. The clinical efficacy was evaluated after treatment. Results: The total effective rate in the spreading moxibustion group was 93.3％, which was significantly higher than 80.0％ in the Western medicine group, and the difference between the groups was statistically significant (P<0.05). After treatment, the TCM symptom scores, the serum FSH levels, FSH/LH ratios and RI in both groups decreased, and the intra-group differences were all statistically significant (all P<0.05). The serum E2 level and PSV increased compared with those in the same group before treatment, and the intra-group differences were statistically significant (all P<0.05). After treatment, the TCM symptom score, the serum FSH level, FSH/LH ratio and RI in the spreading moxibustion group were lower than those in the Western medicine group, while the serum E2 level and PSV were higher than those in the Western medicine group, and the differences between the groups were statistically significant (all P<0.05). Conclusion: Herb-partitioned spreading moxibustion at Baliao points plus climen can produce valid therapeutic efficacy for DOR. It can improve the clinical symptoms, regulate serum hormone levels and increase ovarian blood perfusion, thus improving ovarian reserve function, producing more significant efficacy than climen alone.

Design and organization of neuroscience oriented training mode for medical postgraduates / 医学研究生学报

In order to promote the development of medical and biological fields and help the students trained under the existing system to form a clear overall view on neuroscience research, the author summarizes a systematic chart teaching method in the teaching process of neuroscience which helps the students understand easily. On the basis of theory studying, the article induces and interprets the priorities and hotspots in domestic neuroscience research, which not only cultivates students' interest and enthusiasm in scientific research but also facilitates the training process. It tries to seek the improvement of the education quality from the teachers' perspective and contribution and effectively inspire students' spontaneous excavation in research direction which combines mentor's research field and their own interest, leading students to innovate good learning habits constantly.

Correlation between the genotypes and clinical symptoms of human papilloma virus in male outpatients at STD clinics / 中华男科学杂志

<p><b>Objective</b>To investigate the distribution of the human papilloma virus (HPV) and its genotypes in the male outpatients at the clinics of sexually transmitted diseases (STD) in Changshu and analyze its association with the primary clinical symptoms so as to provide some evidence for the prevention and treatment of HPV infection in men.</p><p><b>METHODS</b>We collected exfoliated cell samples from the external genitals of 602 male outpatients at the STD clinics in Changshu from February 2016 to February 2018, extracted and amplified nucleic acids from the samples, and detected the HPV genotypes using the gene chip technique. We performed statistical analyses on the types of symptoms in clinical diagnosis and their correlation with the genotypes of HPV using the chi-square test.</p><p><b>RESULTS</b>The HPV positive rate in the male STD clinics was 48.2%, of which 47.2 % fell into the low-risk type, 30.0% with multiple infections. The main genotypes included HPV types 6, 11, 39, and 52, and the main HPV-related clinical symptoms were verruca (43.1%) and erythra (41.0%). Low-risk types 6 and 11 accounted for a significantly higher percentage than the high-risk types in the verruca patients (60.0% vs 15.0%, , P < 0.05), but showed no statistically significant difference from the latter in the erythra patients (38.7% vs 38.7%, P > 0.05). The incidence of low-risk infection was remarkably higher than that of high-risk infection in the acrobystitis and balanitis patients (P < 0.05), while the high-risk types constituted a markedly higher percentage than the low-risk and high- and low-risk mixed types in the asymptomatic men at physical examination (84.6% vs 0.0% and 15.4%, P < 0.05).</p><p><b>CONCLUSIONS</b>The HPV positive rate was as high as 48.2% in the males at the STD clinics in Changshu, and the main infection type was low-risk genotype single infection. The clinical symptoms of low-risk infection were mainly verruca and prepuce balanitis, and the high-risk type was mostly asymptomatic at physical examination.</p>

Discussion on scientific problems in standard decoction of traditional Chinese medicine / 中国中药杂志

Based on the reviewing of development and disadvantages of Chinese medicine formula granules, the concept of standard decoction of traditional Chinese medicine was proposed in this study, and it was used as the standard mode of Chinese medicine formula granules to standardize the production process and quality standards of formula granules. The standard was unified according to the principles of "standardization of medicinal materials, standardization of process, intellectualization of production, standardization of quality, normalization of packaging, and informatization of storage"; and consistency evaluation was carried out by the analysis of chemical components, pharmacological activities and clinical efficacy of the standardized decoction and the traditional decoction, interpreting the scientific questions to ensure the stability and uniformity of Chinese medicine formula granule as well as the safety and effectiveness of its clinical application.

Chemical constituents of liquid culture of symbiotic Chaetomium globosum ML-4 of oyster and their in vitro antitumor activity / 中国中药杂志

Isolation and purification of chemical constituents of liquid culture of symbiotic Chaetomium globosum ML-4 of oyster was performed through silica gel column chromatography, gel filtration over Sephadex LH-20, preparative TLC and HPLC. Five compounds were obtained and their structures were determined as chaetoglobosin V(1), chaetoglobosin Vb(2), tyrosol(3), 5-methyluracil(4)and uracil(5), respectively, based on HR-MS and NMR data and comparison with literatures. In vitro cytotoxicity of compounds against human hepatocellular carcinoma cell line SMMC-7721 were measured byMTT method, and results showed that compound 1 could obviously inhibit the proliferation of SMMC-7721 cells with an IC₅₀ value of 60.5 mg•L⁻¹, while the IC₅₀ value of positive control cisplatin was 19.96 mg•L⁻¹. Further studies discovered that compound 1 could lead to G2 phase arrest in SMMC-7721 cells and induce SMMC-7721 cells apoptosis. The ratio of Bcl-2/Bax in SMMC-7721 cells was decreased. The expression of protein Caspases-3,-8,-9 was improved and the expression and phosphorylation level of Akt were reduced. Aforementioned results revealed that in vitro antitumor activity of compound 1 against SMMC-7721 cells were related to G2 phase cell cycle arrest and induced-apoptosis. The induced-apoptosis was involved in both the mitochondrial pathway and the death receptor pathway and connected with activity decline of PI3K/Akt signaling pathway.

Laparoscopic versus open splenectomy and devascularization for massive splenomegaly due to portal hypertension / 华中科技大学学报（医学）（英德文版）

Although the clinical benefit of laparoscopic splenectomy and devascularization (LSD) has been elaborated in many studies, its application in massive splenomegaly remains controversial. We conducted a retrospective research to assess the curative efficacy of LSD for massive splenomegaly due to portal hypertension. Forty-seven patients with massive splenomegaly due to portal hypertension were enrolled in this study, and divided into two groups. Twenty-one patients underwent open splenectomy and devascularization (OSD) from June 2010 to October 2012 (OSD group). From March 2013 to February 2015, LSD was performed on 26 patients (LSD group). Perioperative variables were analyzed. Compared to OSD, LSD was associated with less blood loss (241.9±110.0 mL vs. 319.0±139.5 mL, P<0.05), more rapid resumption of oral diet (2.46±0.95 days vs. 3.76±1.09 days, P<0.05), and shorter postoperative hospital stay (5.35±1.65 days vs. 7.24±1.55 days, P<0.05). It was concluded that for patients with massive splenomegaly due to portal hypertension, LSD is feasible and as safe as OSD.

Effect of Terpinen-4-ol on the proliferation of lung adenocarcinoma A-549 cells in vitro and in vivo / 局解手术学杂志

Objective To investigate the effect of Terpinen-4-ol on the proliferation of lung adenocarcinoma A-549 cells and its related mechanism. Methods A-549 cells were treated with different concentrations of Terpinen-4-ol. The inhibitory effect of Terpinen-4-ol on A-549 cells was tested by MTT method. Cell grow ability was determined by CCK-8 colorimetry. The ultrastructure of A549 cells were observed by transmission electron microscopy before and after Terpinen-4-ol treatment. The changes of cell cycle, apoptosis, and the level of intracel-lular calcium were inspected by flow cytometry. Inoculated the lung adenocarcinoma A-549 cells on the nude mice to form transplantation tumor. The experimental nude mice with transplantation tumors were divided into three groups:negative control group,high dose positive con-trol group and low dose positive control group. The mice were given continuously intraperitoneal injection for 10 days, and then the transplan-tation tumors were taken and the size and weight of them were detected. Results After Terpinen-4-ol treatment for 24 h,MTT assay showed that the IC50 value of A549 cells was 0. 067% v/v. The growth curves of positive control groups were significantly smooth than the negative control group. The formation of autophagosome increased after treatment with Terpinen-4-ol. The results of flow cytometry showed that the cell cycle was arrested in S phase,Terpinen-4-ol could induce apoptosis of A549 cell, The intracellular calcium concentrations in positive control groups were significantly higher than the negative control group(P<0. 05). Low dose group and high dose group restrained the growth of the transplantation tumor obviously, and the tumor inhibitory rate were 53. 33% and 77. 76% respectively. Conclusion Terpinen-4-ol has inhibitory effect on the proliferation of A-549 cells in vitro and in vivo.

Intermittent porta hepatis occlusion is a risk factor of postoperative intra-hepatic recurrence of hepatocellular carcinoma / 中华肝胆外科杂志

Objective To investigate the impact of intermittent porta hepatis occlusion on postoperative intra-hepatic recurrence of hepatocellular carcinoma.Methods We retrospectively reviewed the records of 335 patients who underwent partial hepatectomy.The patients were classified into 2 groups:(1) the study group (n=97):porta hepatis was occluded with intermittent Pringle maneuver with 2-3 cycles of clamp/unclamp time of 15 min/5 min,repeated 2-3cycles; (2) the control group (n=238):including using Pringle maneuver,preconditioning occlusion of porta hepatis and selective occlusion of portal blood inflow.Patients were followed-up in the Outpatient Department once every 2-3 weeks in the 1st year,and once every 3-6 weeks in the 2nd year with US/CT/MRI and serum AFP test.The mean duration of follow-up was 26.5 months.Results The perioperative mortality was 1.8％ (6/335).Tumour recurrence in the study group was 31.6％ and 48.4％ in the 1st and 2nd year,respectively.The recurrence rates were significantly higher,than the 21.4％ and 38.0％ in the control group (P＜0.05).To exclude the miscellaneous factors which were involved in intra-hepatic recurrence of HCC,we set up 3 criteria to include patients for subgroup analysis:tumor ≥5 cm; serum AFP decreased to normal level within 4 weeks; negative intra-operative US scan.The number of patients included were 79 and 155 in the study and the control groups,respectively.There were significant differences in recurrence rate between the study and the control groups in the 1st and 2nd year (29.1％ vs 18.7％,46.8％ vs 35.5％,P＜0.05).There were no significant differences in overall survival rate between the two groups.Conclusions Intermittent porta hepatis occlusion is a risk factor of postoperative intra hepatic recurrence of hepatocellular carcinoma.

Pathogens of prostatitis and their drug resistance: an epidemiological survey / 中华男科学杂志

<p><b>OBJECTIVE</b>To investigate the epidemiological features of the pathogens responsible for prostatitis in the Changshu area, and offer some evidence for the clinical treatment of prostatitis.</p><p><b>METHODS</b>This study included 2 306 cases of prostatitis that were all clinically confirmed and subjected to pathogenic examinations in 3 hospitals of Changshu area from 2008 to 2012. Neisseria gonorrhoeae, mycoplasma urealyticum and chlamydia trachomatis were detected by nucleic acid amplification ABI 7500, the bacterial data analyzed by VITEK-2 Compact, the drug-resistance to antibacterial agents determined using the WHONET 5.6 software, and the enumeration data processed by chi-square test and curvilinear regression analysis using SPSS 19.0.</p><p><b>RESULTS</b>The main pathogens responsible for prostatitis were found to be Staphylococcus haemolyticus (30%), Staphylococcus epidermidis (12%), Enterococcus faecalis (9%), Escherichia coli (6%), Staphylococcus warneri and Staphylococcus aureus (3%), Mycoplasma urealyticum (8%), chlamydia trachomatis (5%) and Neisseria gonorrhoeae (6%). Statistically significant increases were observed in the detection rates of Escherichia coli (chi2 = 17.56, P<0.05), Mycoplasma urealyticum (chi2 = 8.73, P<0.05), Chlamydia trachomatis (chi2 = 8.73, P<0.05) and Enterococcus (chi2 = 8.22, P<0.05), but not in other pathogens. The resistance rates of Gram-positive bacteria to erythromycin and benzylpenicillin G were both above 45%, but with no significant difference between the two, those of Oxacillin (chi2 = 10.06, P<0.05) and Cefoxitin (chi2 = 9.89, P<0.05) were markedly increased, but those of quinolones, gentamycin and clindamycin remained low, except rifampicin (chi2 = 11.09, P<0.05). The resistance rates of Gram-negative bacteria to cefazolin and ampicillin were relatively high (mean 57.3%), and those to ceftriaxone (chi2 = 11.26, P<0.05) and trimethoprim sulfamethoxazole (chi2 =11.00, P< 0.05) significantly high; those to amikacin, cefepime, piperacillin/tazobactam and imipenem remained at low levels with no significant changes. However, the resistance rates of mycoplasma urealyticum to ciprofloxacin (chi2 = 11.18, P<0.05) and azithromycin (chi2 = 9.89, P<0.05) were remarkably increased.</p><p><b>CONCLUSION</b>Gram-positive bacteria are the major pathogens responsible for prostatitis, but Escherichia coli, enterococcus and sexually transmitted disease pathogens are found to be involved in recent years. Quinolones and aminoglycosides are generally accepted as the main agents for the treatment of Gram-positive bacterial infection. However, rational medication for prostatitis should be based on the results of pathogen isolation and drug sensitivity tests in a specific area.</p>

Construction and identification for cell strain of anti-human sperm protein 22 monoclonal antibodies / 中华男科学杂志

<p><b>OBJECTIVE</b>To prepare monoclonal antibodies of mice anti-human sperm protein 22 (SP22) and to identify their specificities.</p><p><b>METHODS</b>BALB/c mice were immunized with human SP22, monoclonal antibodies were prepared by hybridoma technique and the sensitivity and specificity of SP22 McAb were investigated by ELISA and Western-blot assay, respectively. The distribution of human SP22 in sperm were shown by immunohistochemistry.</p><p><b>RESULTS</b>Three strains of hybridoma cells were obtained, with the affinity constant (K) of 1.0 x 10(7) L/mol and the titers were 1:10(3) and 1:3,200 in the mixed supernatant of cell cultures and abdominal dropsy, respectively. IgG isotype of the antibody was identified as IgG1. Western blot demonstrated that there was a specific recognition between human SP22 and the obtained monoclonal antibody. Immunohistochemistry displayed that human SP22 mainly distributed on the acrosome surface of human sperm.</p><p><b>CONCLUSION</b>The monoclonal antibodies of anti-human 22 was prepared by the technique of hybridoma cell has higher titer and specificity, which can combine specially with the SP22 protein on the surface of human sperm.</p>

Advances in the studies of sperm protein 22 (SP22) / 中华男科学杂志

Multifunctional sperm protein 22 (SP22) is expressed ubiquitously and related to quite a few diseases. Located on the sperm surface, SP22 has an enzymatic activity that may assist sperm in penetrating into the ovum. SP22 may be carcinogenic in conspiracy with the factor ras. Among all species SP22 is highly conservative, which demonstrates its importance to life. More and more studies indicate that SP22 is directly correlated with male infertility and Parkinsons disease. This article summarizes recent researches on SP22 in the gene structure, protein structure and functional characteristics.