[Serology and genomic analysis of para-Bombay individuals in a hospital in Hunan Province]

To investigate the serological and genetic characteristics of para-Bombay patients in a hospital in Hunan Province. A retrospective analysis was conducted on the blood type results of 175 439 hospitalized patients born in Hunan Province from the Third Xiangya Hospital, Central South University from 2016 to 2021. Phenotypes of ABO blood group was analyzed by blood group serology, and molecular biological methods were used to analyze the genotype, including ABO genotyping by polymerase chain reaction-sequence specific primers (PCR-SSP) and fucosyltransferase 1 (FUT1) and fucosyltransferase 2 (FUT2) gene sequencing. The results showed that 3 cases of Ah and 1 case of Bh were detected. FUT1 sequencing showed that there were 2 cases of h3h3, 1 case of h1h1 and 1 case of h302h1, of which h302 (c.302C>T) was the first discovered mutation. FUT2 sequencing revealed that 4 cases were all Se357Se357. The pedigree study showed that the inheritance of para-Bombay blood group was consistent with autosomal dominant inheritance. In conclusion, the FUT1 gene mutations leading to para-Bombay blood group mainly include h3, h1 and h302, of which h3 mutation is the most common.

[Correlation between polycyclic aromatic hydrocarbons component phenanthrene and clinical indicators in patients on peritoneal dialysis]

Objective: To explore the correlation between polycyclic aromatic hydrocarbons (PAHs) component phenanthrene and clinical indicators in patients on continuous ambulatory peritoneal dialysis (CAPD). Methods: A total of 22 patients who underwent peritoneal dialysis catheterization and regular dialysis in the First Affiliated Hospital of Zhengzhou University from June to August 2018 were selected. Meanwhile, 18 healthy adults who underwent physical examination were also selected as the control group. Fasting blood samples were taken to detect the concentration of PAHs components for comparison, and the correlation between PAHs components and clinical indicators was further analyzed. Results: There were 22 cases in CAPD group (13 males and 9 females), and aged (45±13) years, while there were 18 cases in control group (6 males and 12 females), and aged (41±13) years. The concentration of blood phenanthrene (PHE) was the highest in CAPD group [0.449 (0.254, 0.581) mg/L], and it was only lower than acenaphthene in the control group [0.081 (0.050, 0.444) mg/L], with a statistically significant difference between the two groups (P=0.008). The analysis of PHE and clinical indicators showed that the concentration of PHE in CAPD patients was negatively correlated with weekly urea clearance index (Kt/V), weekly creatinine clearance (Ccr) and leukocyte level, but positively correlated with triglyceride level (r=-0.743, -0.749, -0.655 and 0.610, respectively, all P<0.05). Simple linear regression analysis demonstrated that for every 0.1 mg/L increase in PHE concentration, weekly Kt/V, weekly Ccr and white blood cell count decreased by 0.226, 3.050 L/1.73 m² and 0.512×10⁹/L, respectively, but triglyceride level increased by 0.152 mmol/L (all P<0.05). Multiple linear regression analysis revealed that the blood PHE concentration of CAPD patients was negatively correlated with weekly Kt/V and Ccr levels (t=-2.402 and -2.368, respectively, both P<0.05). All CAPD patients were followed up for 3 years, during which 8 patients (36.4%) withdrew from peritoneal dialysis due to technical failure, and the baseline PHE concentration was higher than that of patients who did not quit peritoneal dialysis [0.572 (0.416, 0.662) vs 0.268 (0.120, 0.475) mg/L, P=0.003]. Eight patients (36.4%) had cardiovascular events, and the baseline blood PHE concentration was higher than that of patients without cardiovascular events [0.542 (0.389, 0.741) vs 0.373 (0.157, 0.545) mg/L, P=0.045]. Conclusion: PHE correlates with clinical indicators of CAPD patients, including Kt/v, Ccr, leukocyte and triglyceride.

Minimally invasive open reduction of greater tuberosity fractures by a modified suture bridge procedure

BACKGROUND

Most greater tuberosity fractures can be treated without surgery but some have a poor prognosis. The surgical procedures for avulsion fractures of the humeral greater tuberosity include screw fixation, suture anchor fixation, and plate fixation, all of which have treatment-associated complications. To decrease surgical complications, we used a modified suture bridge procedure under direct vision and a minimally invasive small incision to fix fractures of the greater tuberosity of the humerus.

AIM

To investigate the clinical efficacy and outcomes of minimally invasive modified suture bridge open reduction of greater tuberosity evulsion fractures.

METHODS

Sixteen patients diagnosed between January 2016 and January 2019 with an avulsion-type greater tuberosity fracture of the proximal humerus and treated by minimally invasive open reduction and modified suture bridges with anchors were studied retrospectively. All were followed up by clinical examination and radiographs at 3 and 6 wk, 3, 6 and 12 mo after surgery, and thereafter every 6 mo. Outcomes were assessed preoperatively and postoperatively by a visual analog scale (VAS), the University of California Los Angeles (UCLA) shoulder score, the American Shoulder and Elbow Surgeon score (ASES), and range of motion (ROM) for shoulders.

RESULTS

Seven men and nine women, with an average age of 44.94 years, were evaluated. The time between injury and surgery was 1-2 d, with an average of 1.75 d. The mean operation time was 103.1 ± 7.23 min. All patients achieved bone union within 3 mo after surgery. VAS scores were significantly decreased (P = 0.002), and the mean degrees of forward elevation (P = 0.047), mean degrees of abduction (P = 0.035), ASES score (P = 0.092) were increased at 3 wk. The UCLA score was increased at 6 wk (P = 0.029) after surgery. The average degrees of external rotation and internal rotation both improved at 3 mo after surgery (P = 0.012 and P = 0.007, respectively). No procedure-related deaths or incision-related superficial or deep tissue infections occurred.

CONCLUSION

Modified suture bridge was effective for the treatment of greater tuberosity evulsion fractures, was easier to perform, and had fewer implants than other procedures.

Pedicle complex tissue flap transfer for reconstruction of duplicated thumbs with unequal size

BACKGROUND

Thumb polydactyly is one of the most common congenital hand deformities, and the Bilhaut-Cloquet procedure or a modified one is often used. However, controversy remains over the rare instances in which both thumbs are not of similar length or far apart in distance.

AIM

To evaluate the clinical outcomes of pedicle complex tissue flap transfer in the treatment of duplicated thumbs with unequal size.

METHODS

From January 2014 to December 2020, 15 patients underwent duplicated thumb reconstruction by pedicle complex tissue flap transfer at our hand surgery center. The technique was used when it was necessary to combine different tissues from both severed and preserved thumbs that were not of similar length or far apart in distance. Subjective parents’ evaluations and functional outcomes (ALURRA and TATA criteria) were obtained. The alignment deviation, instability, range of motion (percent of opposite thumb) of the interphalangeal and metacarpophalangeal joints, and the aesthetic aspects, including circumference, length, nail size, and nail deformity, were used to assess the clinical outcomes.

RESULTS

The average age of patients at the time of surgery was 13 mo, and the mean final follow-up occurred at 42 mo. An appropriate volume with a stable joint and good appearance was obtained in 14 reconstructed thumbs. An unstable interphalangeal joint occurred in one thumb. The flexion-extension arc at the metacarpophalangeal joint was good, while that at the interphalangeal joint was poor. Most of the parents were satisfied with the cosmetic and functional results of the reconstructed thumbs. The mean ALURRA score was 21.8 (range: 20-24), and the Tada score was 6.9 (range: 5-8). Compared with the non-operated side, the length of the operated thumb was approximately 95%, the girth was 89%, and the nail width was 82.9%. The mean ranges of motion were 62.1% of that of the unaffected thumb in the interphalangeal joint and 78.3% in the metacarpophalangeal joint.

CONCLUSION

Harvesting a pedicle flap from a severed thumb is a safe and reliable procedure. Defects of the preserved thumb, such as the skin, nail, and bone, can be effectively restored using the complex tissue flap.

Dislocation dynamics modelling of the creep behaviour of particle-strengthened materials

Plastic deformation in crystalline materials occurs through dislocation slip and strengthening is achieved with obstacles that hinder the motion of dislocations. At relatively low temperatures, dislocations bypass the particles by Orowan looping, particle shearing, cross-slip or a combination of these mechanisms. At elevated temperatures, atomic diffusivity becomes appreciable, so that dislocations can bypass the particles by climb processes. Climb plays a crucial role in the long-term durability or creep resistance of many structural materials, particularly under extreme conditions of load, temperature and radiation. Here we systematically examine dislocation-particle interaction mechanisms. The analysis is based on three-dimensional discrete dislocation dynamics simulations incorporating impenetrable particles, elastic interactions, dislocation self-climb, cross-slip and glide. The core diffusion dominated dislocation self-climb process is modelled based on a variational principle for the evolution of microstructures, and is coupled with dislocation glide and cross-slip by an adaptive time-stepping scheme to bridge the time scale separation. The stress field caused by particles is implemented based on the particle-matrix mismatch. This model is helpful for understanding the fundamental particle bypass mechanisms and clarifying the effects of dislocation glide, climb and cross-slip on creep deformation.

Salvage of vascular graft infections via vacuum sealing drainage and rectus femoris muscle flap transposition: A case report

BACKGROUND

The management of vascular graft infections continues to be a significant challenge in a clinical situation. The aim of this report is to illustrate the novel vacuum sealing drainage (VSD) technique and rectus femoris muscle flap transposition for vascular graft infections, and to evaluate the prospective of future testing of this surgical procedure.

CASE SUMMARY

We report the case of a 32-year-old male patient, who presented a severe infected groin wound with biological vascular graft Acinetobacter baumannii infection resulting in extensive graft exposure. Using the VSD and muscle flap trans-position, the groin wound and vascular graft infection were finally treated successfully.

CONCLUSION

Our case report highlights that VSD technique and rectus femoris muscle flap transposition could be considered in patients presenting with a severe infected groin wound with biological vascular graft Acinetobacter baumannii infection resulting in extensive graft exposure, especially in consideration of treatable conditions.

[Analysis of clinical prognosis of 68 patients with gastric mucosa-associated lymphoid tissue lymphoma]

Objective: To explore the clinical features and prognosis of gastric mucosa-associated lymphoid tissue lymphoma. Methods: The data of patients with gastric mucosa-associated lymphoid tissue lymphoma diagnosed and treated at Peking University Cancer Hospital from 2000 to 2019 were collected, and their clinical characteristics, treatment options and effects, and prognosis were retrospectively analyzed. Results: The median age of 68 patients was 56 years old, and the ratio of men to women was 0.6∶1.0. Early patients accounted for about 76% (52/68). The most commonly used treatment is Helicobacter pylori eradication, followed by radiotherapy and chemotherapy. The total effective rate is 94%, of which the complete remission rate is 72%. With a median follow-up of 44 months, the 5-year progression-free survival (PFS) rate was 73%, and the overall survival (OS) rate was 83%. Prognostic factor analysis showed that albumin level (P=0.011) and international prognostic index (IPI)(P=0.017) are independent prognostic indicators of PFS, The 5-year PFS rate of patients with normal and reduced albumin was 77% and 50%, respectively, and the 5-year PFS rate of patients with IPI score<2 points and IPI ≥ 2 points was 80% and 48%, respectively. Lactate dehydrogenase (LDH) (P=0.016) and albumin level (P=0.025) are independent prognostic indicators of OS, and the 5-year OS rates of patients with normal and elevated LDH were 87% and 67%, respectively. The 5-year OS rates of patients with normal albumin and reduced were 92% and 73%, respectively. Conclusions: Gastric mucosa-associated lymphoid tissue lymphoma is sensitive to treatment and has a good prognosis. The patient's albumin and lactate dehydrogenase levels are independent prognostic indicators.

Effects of organic zinc on tibia quality, mineral deposit, and metallothionein expression level of aged hens

The study aimed to determine the effects of methionine hydroxy analog chelate zinc on the tibia quality, mineral deposit, apparent retention of nutrients, and liver metallothionein (MT) expression level of aged laying hens. A total of 960 layers (Hy-Line Grey, 57 wk old) were randomly assigned into 4 groups, and each group had 8 replicates of 30 hens. During the first 2 wk, groups were fed a basal diet without extra zinc (Zn: 35.08 mg/kg). During the ensuing 14 wk, 4 levels of Zn (inorganic Zn: 80 mg/kg; organic Zn: 20, 40, 80 mg/kg) were added to the diet. The results indicated that both the Zn source and level did influence tibia strength and calcium (Ca) and Zn concentrations of tibia (P < 0.05), whereas there were no differences in the copper (Cu) and phosphorus (P) concentrations of the tibia and the tibia length (P > 0.05). Moreover, dietary supplementation with 40 or 80 mg/kg of organic Zn showed higher Zn and Ca concentrations in the tibia and higher tibia strength. The Cu concentration in the liver showed no difference among the 4 treatments, whereas the Zn concentration in the liver increased with the increasing Zn level. The apparent retention of P, iron (Fe), and manganese (Mn) was not affected by the Zn level or source (P > 0.05). However, the organic Zn group increased the apparent retention of Cu, Zn, Ca, crude protein (CP), and energy, and the group supplemented with 40 or 80 mg/kg of organic Zn obtained significant effects (P < 0.05). Moreover, dietary supplementation with 40 or 80 mg/kg organic Zn increased the MT mRNA expression of the liver at week 72, whereas 20 mg/kg of organic Zn decreased it (P < 0.05). In conclusion, this study suggested that an optimum dietary (40 mg/kg) organic Zn level plays a key role in promoting the apparent retention of minerals and nutrients, trace element deposit, and MT mRNA expression.

[Establishment of a cell co-culture system in accordance with the immunological characteristics of chronic HBV infection]

Objective: To investigate whether the co-culture of Huh7.93 cells and peripheral blood mononucleated cells from chronic hepatitis B patients (cPBMCs) can simulate the replication features of hepatitis B virus (HBV) and immune function in chronic hepatitis B (CHB) patients, and to provide an in vitro cell co-culture system for the research on immune clearance in chronic HBV infection. Methods: Huh7.93 cells were cultured alone or co-cultured with peripheral blood mononucleated cells from healthy people who underwent physical examination (nPBMCs) or cPBMCs for 7 days. The CCK8 assay was performed to measure the proliferative activity of Huh7.93 cells, and quantitative real-time PCR and Southern blot were used to measure HBV replication in cPBMCs and co-cultured cells. The independent samples t-test was used for comparison between two groups. Results: When Huh7.93 cells were co-cultured with peripheral blood mononucleated cells (PBMCs) at a certain ratio, Huh7.93 cells had a high proliferative activity and good cell growth. HBV could not infect or replicate in cPBMCs. HBV DNA in the supernatant of Huh7.93 cells co-cultured with cPBMCs showed significant increases and significantly higher than that in the supernatant of Huh7.93 cells cultured alone on day 4 (6.01 ± 0.20 log₁₀copies/ml vs 4.99 ± 0.08 log₁₀copies/ml, P = 0.000) and day 7 (7.82 ± 0.24 log₁₀copies/ml vs 6.96±0.09 log₁₀copies/ml, P = 0.000). On day 7 of culture, the cell lysis buffer of Huh7.93 cells co-cultured with cPBMCs had a significant increase in the level of HBV replicative intermediate compared with that of Huh7.93 cells cultured alone. After HepG2.2.15 cells were co-cultured with cPBMCs, there was no significant increase in HBV replication. Conclusion: The co-culture of Huh7.93 cells and cPBMCs produces similar viral replication as human body infected with HBV and can well simulate the liver microenvironment and immune function in CHB patients, which provides a new method for the research on immune clearance in chronic HBV infection.

Factors Associated with Visceral Fat Loss in Response to a Multifaceted Weight Loss Intervention

Background

Visceral adipose tissue is more metabolically active than other fat depots and is more closely associated with obesity-related diseases, such as cardiovascular disease and type 2 diabetes, than indicators of obesity, such as body mass index. Across various strategies to promote weight loss, including energy-reduced diet and exercise, variable effects on VAT compared to loss of total body fat have been reported.

Methods

To examine the effect of a behavioral weight loss intervention using portion-controlled prepackaged entrées on VAT, we examined data and measurements from overweight/obese men and women (N=183) who were assigned to a weight loss intervention and prescribed a reduced-energy diet with either portion-controlled prepackaged entrées or self-selected meals in a randomized clinical trial. VAT was estimated with dual-energy X-ray absorptiometry at baseline and study end (12 weeks).

Results

VAT loss was greater for the prepackaged entrees group (p=0.02), with an average loss of 29% compared to an average loss of 19% among participants consuming self-selected meals. VAT (mean [SEM]) was 1651 (71) g and 1546 (157) g at baseline and 1234 (59) g and 1278 (118) g at study end in the prepackaged entrees and self-selected meal groups, respectively. Greater VAT loss was associated with higher baseline weight and VAT, and greater weight loss, but not associated with age or physical activity.

Conclusion

Prescribing portion-controlled prepackaged entrees in a behavioral weight loss intervention promotes a reduction in VAT, which should promote improved metabolic profile and reduced cardiovascular disease risk.

The Cost Effectiveness of High-Dose versus Conventional Haemodialysis: a Systematic Review

BACKGROUND

End-stage renal disease (ESRD) is fatal if untreated. In the absence of transplant, approximately 50 % of dialysis patients die within 5 years. Although more frequent and/or longer haemodialysis (high-dose HD) improves survival, this regimen may add to the burden on dialysis services and healthcare costs. This systematic review summarised the cost effectiveness of high-dose HD compared with conventional HD.

METHODS

English language publications reporting the cost-utility/effectiveness of high-dose HD in adults with ESRD were identified via a search of MEDLINE, Embase, and the Cochrane Library. Publications comparing any form of high-dose HD with conventional HD were reviewed.

RESULTS

Seven publications (published between 2003 and 2014) reporting cost-utility analyses from the public healthcare payer perspective were identified. High-dose HD in-centre was compared with in-centre conventional HD in one US model; all other analyses (UK, Canada) compared high-dose HD at home with in-centre conventional HD (n = 5) or in-centre/home conventional HD (n = 1). The time horizon varied from one year to lifetime. Similar survival for high-dose HD and conventional HD was assumed, with the impact of higher survival only assessed in the sensitivity analyses of three models. High-dose HD at home was found to be cost effective compared with conventional HD in all six analyses. The analysis comparing high-dose HD in-centre with conventional in-centre HD produced an incremental cost-effectiveness ratio generally acceptable for the USA, but not for Europe, Canada or Australia.

CONCLUSION

High-dose HD can be cost effective when performed at home. Future analyses assuming survival benefits for high-dose HD compared with conventional HD are needed.

Cost analysis of neonatal and pediatric parenteral nutrition in Europe: a multi-country study

OBJECTIVES

Parenteral nutrition (PN) is critical in neonatal and pediatric care for patients unable to tolerate enteral feeding. This study assessed the total costs of compounding PN therapy for neonates, infants and children.

METHODS

Face-to-face and telephone interviews were conducted in 12 hospitals across four European countries (Belgium, France, Germany and UK) to collect information on resources utilized to compound PN, including nutrients, staff time, equipment cost and supplies. A bottom-up cost model was constructed to assess total costs of PN therapy by assigning monetary values to the resource utilization using published list prices and interview data.

RESULTS

A total of 49,922 PN bags per year were used to treat 4295 neonatal and pediatric patients among these hospitals. The daily total costs of one compounded PN bag for neonates in the 12 hospitals across the four countries equalled euro 55.16 (Belgium euro 53.26, France euro 46.23, Germany euro 64.05, UK Ł 37.43/\[euro]42.86). Overall, nutrients accounted for 25% of total costs, supplies 18%, wages 54% and equipment 3%. Average costs per bag for infants <2 year were euro 84.52 (euro 74.65 in Belgium, euro 83.84 in France, euro 92.70 in Germany and Ł 52.63/euro 60.26 in the UK), and for children 2-18 years euro 118.02 (euro 93.85 in Belgium, euro 121.35 in France, euro 124.54 in Germany and Ł 69.49/euro 79.56 in the UK), of which 63% is attributable to nutrients and 28% to wages.

CONCLUSION

The data indicated that PN costs differ among countries and a major proportion was due to staff time (Ł 1=euro 1.144959).

Effects of purified zearalenone on growth performance, organ size, serum metabolites, and oxidative stress in postweaning gilts

Zearalenone (ZEA), an estrogenic mycotoxin, is produced mainly by Fusarium fungi. Previous studies indicated that acute ZEA exposure induced oxidative stress and damage in multiple organs. Therefore, the present study was designed to investigate the adverse effects of dietary ZEA (1.1 to 3.2 mg/kg of diet) on oxidative stress and organ damage in postweaning gilts. A total of 20 gilts (Landrace × Yorkshire × Duroc) weaned at d 21 with an average BW of 10.36 ± 1.21 kg was used in the study. Gilts were housed in a temperature-controlled room, divided into 4 treatments, and fed a basal diet only (control) or basal diet supplemented with purified ZEA at a dietary concentration of 1 (ZEA1), 2 (ZEA2), or 3 (ZEA3) mg/kg of diet for 18 d ad libitum. The actual ZEA contents (analyzed) were 0, 1.1 ± 0.02, 2.0 ± 0.01, and 3.2 ± 0.02 mg/kg for control, ZEA1, ZEA2, and ZEA3, respectively. Gilts fed different amounts of dietary ZEA grew similarly with no difference (P > 0.05) in feed intake. Vulva size increased linearly over the 18 d of feeding in gilts fed diets containing 1.1 mg of ZEA/kg or greater (P < 0.001). Relative weight of genital organs, liver, and kidney increased linearly (P < 0.05) in a ZEA-dose-dependent manner. Serum aspartate aminotransferase, alanine aminotransferase, alkaline phosphatase, γ-glutamate transferase, urea, and creatinine (P < 0.05), and malondialdehyde concentrations in both serum and liver (P < 0.001) were also increased linearly in a ZEA-dose-dependent manner. However, spleen relative weight (P = 0.002) and activities of total superoxide dismutase and glutathione peroxidase (in both serum and liver (P < 0.05) were decreased linearly as dietary ZEA increased. Results showed that besides genital organs, the liver, kidney, and spleen may also be target tissues in young gilts fed diets containing 1.1 to 3.2 mg of ZEA/kg for 18 d. Increased key liver enzymes in the serum suggest progressive liver damage caused by feeding ZEA, and an increase in oxidative stress in gilts is another potential impact of ZEA toxicity in pigs.

Wolbachia screening in spiders and assessment of horizontal transmission between predator and prey

Recent studies have revealed that the prevalence of Wolbachia in arthropods is attributable not only to its vertical transmission, but also to its horizontal transfer. In order to assess the horizontal transmission of Wolbachia between predator and prey, arthropods belonging to 11 spider families and six insect families were collected in the same field of rice. The distribution of Wolbachia in these arthropods was detected by diagnostic PCR amplification of the wsp (Wolbachia outer surface protein gene) and 16S rDNA genes. Nurscia albofasciata Strand (Araneae: Titanoecidae), Propylea japonica Thunberg (Coleoptera: Coccinellidae), Paederus fuscipes Curtis (Coleoptera: Staphylinidae), and Nilaparvata lugens Stal (Homoptera: Delphacidae) were infected with Wolbachia. This is the first report of infection of N. albofasciata and P. fuscipes by Wolbachia. No direct evidence indicated the existence of horizontal transmission of Wolbachia between predator and prey.

Pathologic significance of proliferative activity and oncoprotein expression in astrocytic tumors

OBJECTIVE

To clarify the clinicopathologic significance of immunohistochemistry for proliferative activity and oncoprotein expression in astrocytic tumors.

STUDY DESIGN

Ninety-seven cases of brain astrocytic tumors with histologic grading and follow-up data were investigated with immunohistochemistry and image analyzer to detect the expression of proliferating cell nuclear antigen (PCNA), silver-binding nucleolar organizer regions (AgNORs) and several oncoproteins.

RESULTS

PCNA was significantly related to AgNORs, grading and prognosis of astrocytomas. The frequency of mutant p53 protein expression was higher in grade 2-4 astrocytomas than in grade 1. Epidermal growth factor (EGF) (37.1%), EGF receptor (83.5%) and p21ras (42.3%) expression levels were related to neither the grade nor prognosis of the tumors. The positive ratios of p53 antibodies were higher in grades 2-4 than in grade 1, and the intensities correlated with PCNA but not with prognosis.

CONCLUSION

Aberrations of c-erbB-2, p21ras, EGF and EGF receptor might be early events in the initiation and progression of astrocytomas, whereas p53 overexpression is involved in all the stages. Immunohistochemical detection had no prognostic value. PCNA could be important to the evaluation of astrocytoma malignancy.

Correlation of bFGF, FGFR-1 and VEGF expression with vascularity and malignancy of human astrocytomas

OBJECTIVE

To investigate the correlation of angiogenic factor expression levels with the degrees of malignancy and vascularity and their clinicopathologic significance in astrocytomas.

STUDY DESIGN

Factor VIII-related antigen (FVIII-RAg) was used as the marker of endothelia and basic fibroblast growth factor (bFGF); FGF receptor (FGFR)-1 and vascular endothelial growth factor (VEGF) were qualitatively and quantitatively detected with immunohistochemistry and image analysis in 61 brain astrocytomas. The correlation with tumor grades, angiogenesis and prognosis was studied.

RESULTS

Measurement of FVIIIRAg expression could describe endothelial proliferation and vascularity, which were related to grade of tumor and prognosis. bFGF and VEGF expression levels in neoplastic astrocytes and endothelia were significantly different in various grades of astrocytoma. These angiogenic factors affected the positive reaction areas and integral optical densities of FVIII-RAg as well as survival time. In contrast, the expression of FGFR-1 was related to neither bFGF nor FVIIIRAg and had no significant effect on tumor malignancy.

CONCLUSION

Positive regulation by bFGF and autocrine/paracrine VEGF contributes to the growth and angiogenesis of astrocytomas. Measurement of endothelial cell proliferation with FVIIIRAg in tumor stroma and quantitative detection of angiogenic factor levels in neoplastic cells had prognostic value in brain astrocytomas. The results also indicate that inhibiting bFGF and VEGF expression and/or blocking their effects could be a very useful therapeutic strategy for malignant gliomas.

A clinical, endoscopic and pathological study of ulcer-carcinoma: report of 210 cases

A multicentre retrospective study of ulcer-carcinoma was carried out in 16 hospitals in China, with the aim of examining the correlation between pre-cancerous lesions and malignant change associated with benign gastric ulcer. Malignant change occurred at 2% over a variable period of 6 months to 15 years. About two-thirds of the ulcer cancers were found to be tubular adenocarcinoma.

[Determination of cell nuclear DNA content in polyps and cancerous degeneration in the large intestine]

Nuclear DNA content was measured by microspectrophotometry in 40 biopsy specimens from patients with large bowel polyps (10 juvenile polyps and inflammatory polyps, 25 adenoma subdivided into 3 groups with 10 Grade I, 10 Grade II and 5 Grade III, 5 cancerous degeneration), and 5 normal epithelium of large intestine. The mean DNA value increased steadily as follows: normal epithelium of intestine (13.54 +/- 1.76 Au); juvenile polyps and inflammatory polyps (14.89 +/- 0.40 Au); adenoma Grade III (21.96 +/- 0.92 Au); cancerous degeneration (24.47 +/- 1.48 Au). The difference in DNA value in these groups was statistically significant (P less than 0.05-0.01). These results suggest that measurement of nuclear DNA content may serve as an objective quantitative parameter for diagnosis of large bowel carcinomatous change of polyps and classification of polypoid adenomas.

[The study of holographic interferometry of the maxilla]

The method which combines the removable appliance with a headgear attached to the maxillary dentition is widely used in treatment of the maxillary protrusion of growing children. The initial reaction of maxillary complex caused by the removable appliance retraction was studied by the holographic interferometry. In this paper, the results indicate that when the pull applied along the occlusal plane the maxilla was moved downward, whereas when the pall applied along the occlusal plane at 15 the maxilla was moved upward and backward. The advantage of this method and model of the experimentation was discussed in the paper.

[Determination of cell nuclear DNA content in leiomyoma and leiomyosarcoma of gastro-intestinal tract (G-I)]

Nuclear DNA content was measured by microspectrophotometry in 15 biopsy specimens from patients with G-I smooth muscle tumors (3 leiomyomas and 12 leiomyosarcomas subdivided into 3 groups with 4 cases to each). The mean DNA value increased steadily as follows: leiomyomas (14.39 +/- 0.62 Au); leiomyosarcoma Grade I (19.78 +/- 2.39 Au); Leiomyosarcoma Grade II (26.39 +/- 1.60 Au); leiomyosarcoma Grade III (30.66 +/- 2.39 Au). The difference of DNA value in the 4 groups had statistical significance (P less than 0.05-0.01). These results suggest that microspectrophotometric measurement of nuclear DNA content may serve as an objective quantitative method for diagnosis of G-I tract smooth muscle tumors and classification of leiomyosarcoma.

[Primary malignant lymphoma of the central nervous system--report of 5 cases]

5 cases of primary malignant lymphoma of the central nervous system are reported. 3 were males and 2 females. Their ages ranged from 7 to 59. In 3 cases, the lesion occurred in the right parietal lobe and 2 in the right frontal lobe. The main clinical manifestations were as follows: headache (4/5), vomiting (5/5), hemiplegia (4/5) and mental disturbances (3/5). The histologic pattern in this group consists of 3 types, i. e. 3 B-small lymphocyte, 1 B-lymphocyte mixed and 1 large non-cleaved cell. The histogenesis, diagnosis and prognosis of this tumor are discussed briefly.