[Bladder cancer local staging about muscle invasion: 3.0T MRI performance following transurethral resection].

OBJECTIVE: To evaluate the performance of 3.0T magnetic resonance imaging examination (MRI) for the local detecting of muscle invasive bladder cancer following transurethral resection of bladder tumor (TURBT). METHODS: Retrospective study identified 55 patients with pathology-proven bladder cancer who underwent transurethral resection of bladder tumor followed by 3.0T magnetic resonance imaging between September 2012 and April 2019 in our hospital. Two radiologists reviewed pelvic magnetic resonance imaging together and judged muscle invasive bladder cancer. Sensitivity, specificity and accuracy were calculated for the presence of muscle invasion by T2 weighted imaging (T2WI) only, diffusion-weighted imaging (DWI) only and T2WI+DWI compared with the findings at radical cystectomy as the reference standard. RESULTS: Of the 55 patients with pathological results from radical cystectomy, 3.64% (2/55) had no residual disease; 29.09% (16/55) were non-muscle invasive bladder cancer on pathology, including 13 cases in T1 and 3 cases in Ta; 34.55% (19/55) were in stage T2 depending on pathology, 25.45% (14/55) in T3, and 7.27% (4/55) in T4. The average age was 60.76 years, ranging from 42 to 82 years. There were 48 males and 7 females in our study. Before pelvic MRI examination, all the patients received transurethral resection of bladder tumor, including 16 cases taking the operation in our hospital and 39 cases in other hospitals. The interval between the pelvic MRI examination and transurethral resection of bladder tumor was more than 2 weeks in all the patients. They all underwent radical cystectomy within 1 month after the pelvic MRI examination, and no patient underwent radiotherapy or chemotherapy in our study during the interval between the MRI examination and radical cystectomy. T2WI only, DWI only, and T2WI+DWI of 3.0T magnetic resonance imaging for readers were with sensitivity: 94.59%, 83.78%, 91.89%; with specificity: 66.67%, 77.78%, 72.22% and with accuracy: 85.45%, 81.82%, 85.45%, respectively. CONCLUSION: 3.0T MRI may have a role in diagnosing muscle invasive bladder cancer following TURBT. T2WI has the advantage of detecting the location of bladder tumor, and DWI has the advantage of differentiating between the benign and malignant lesion. 3.0T MRI T2WI+DWI has a good utility in the detection of muscle invasive bladder cancer following TURBT with satisfied accuracy.

Upregulation of LncRNA FAM83H-AS1 in hepatocellular carcinoma promotes cell proliferation, migration and invasion by Wnt/ß-catenin pathway.

OBJECTIVE: The long non-coding RNA, FAM83H antisense RNA 1 (head to head) (FAM83H-AS1), has been reported to function as an oncogene in some types of cancer. However, the role of lncRNA FAM83H-AS1 in hepatocellular carcinoma (HCC) still remains unknown. The present work aims to explore the effect of lncRNA FAM83H-AS1 on cell proliferation and cell invasion in HCC. PATIENTS AND METHODS: 66 pairs of HCC tissue samples and adjacent normal tissues were collected, and the expression level of lncRNA FAM83H-AS1 was detected by quantitative Reverse Transcription-Polymerase Chain Reaction (qRT-PCR) analysis. Cell Counting Kit-8 (CCK-8) assay was performed to detect cell proliferation ability, and transwell assays were applied to observe the effect of lncRNA FAM83H-AS1 on cell migration and invasion. QRT-PCR and Western blot analysis was used to determine the mRNA and protein expression. RESULTS: In the present study, our results confirmed that lncRNA FAM83H-AS1 expression was overexpressed in HCC tissues relative to the adjacent normal tissues. Furthermore, higher lncRNA FAM83H-AS1 expression significantly associated with tumor size and vascular invasion in patients with HCC. The Kaplan-Meier methods and log rank test demonstrated that increased lncRNA FAM83H-AS1 expression associated with shorter patient overall survival compared to lower lncRNA FAM83H-AS1 expression in patients with HCC. Moreover, function assays by CCK-8 cell proliferation and transwell cell migration and invasion assays showed that the knockdown of lncRNA FAM83H-AS1 significantly inhibited cell proliferation, migration, and invasion ability in HCC. Moreover, we found that the downregulating expression of lncRNA FAM83H-AS1 inhibited Wnt/ß-catenin pathway by reducing ß-catenin and WNT1 expression in HCC cells. CONCLUSIONS: Together, our results indicated that it plays an important role in HCC progression and may be a potential target for HCC treatment.

An innovative method based on cloud model learning to identify high-risk pollution intervals of storm-flow on an urban catchment scale.

Identifying high-risk storm-flow pollution intervals in an urban watershed is critical for watershed pollution control decision-making. High-risk pollution intervals of storm-flow are defined as storm-flow intervals that contribute more than the background pollutant load, and whose load contribution rank in the top 20%. However, the identification of high-risk pollution intervals is difficult due to variations in the flow-concentration relationship among rain events, uncertainty inherent in stormwater quality data, and physically-based stormwater models requiring a substantial number of parameters. A new method for identifying high-risk pollution intervals during different rain events is proposed. A dataset of the urban watershed located in Shenzhen, southern China, was used to demonstrate the proposed method. A "cut-pool" strategy was initially used to pre-process the dataset for maximizing valuable information hidden in existing datasets and to investigate the impact of rainfall on flow-concentration relationships. Gaussian cloud distribution was then introduced to capture the trend, dispersing extent and randomness of stormwater quality data at any flow interval. Interval Overlapping Ratio (IOR) and Load contribution of storm-flow high-risk pollution intervals was used to assess the performance of the method. Results show that storm-flow high-risk Chemical Oxygen Demand (COD) pollution intervals of the Shiyan watershed was 0.5-1.5 mm under light rain (0-13 mm), 1-3 mm under moderate rain (13-27 mm) and 5-7 mm under heavy rain (27-43 mm). The accuracy of the identified high-risk pollution intervals (IOR) was 63-66% under light rain, 64-67% under moderate rain. Moreover, COD load can be reduced by 44-48% with high-risk storm-flow under light rain; 43-49% under moderate rain; 32% under heavy rain. This method is very useful for effectively controlling storm-flow pollution on an urban catchment scale.

[Effect of incisor retraction on three-dimensional morphology of upper airway and fluid dynamics in adult class â patients with bimaxillary protrusion].

Objective: To investigate the effect of incisor retraction on three-dimensional morphology of upper airway and fluid dynamics in class Ⅰ adult patients with bimaxillary protrusion. Methods: Thirty class Ⅰ patients with bimaxillary protrusion that received fixed orthodontic treatment in Department of Stomatology, The First Affiliated Hospital of Wenzhou Medical University from January 2011 to September 2014 were selected using random number table. All the patients were treated with extraction of four first premolars and retraction of anterior teeth using implant anchorage. Cone-beam CT (CBCT) scans were performed before and after incisor retraction for all patients. The CBCT data of the upper airway were constructed using Mimics 16.0, and the flow field characteristics inside the upper airway were simulated using Ansys 14.0. The changes of volume (V), mean cross-sectional area (mCSA), maximum lateral diameters/maximum anteroposterior diameters (LP/AP) of cross section, the maximum pressure of airflow (P(max)), the minimum pressure of airflow (P(min)) and pressure drop (△P) of nasopharynx, oropharynx and hypopharynx before and after incisor retraction were measured and compared using paired t test. The correlation between the variation of △P in the most significant pharyngeal part and the morphological variables after incisor retraction was analyzed using Pearson correlation test. Results: No statistical differences were observed in the morphology and flow field in nasopharynx before and after incisor retraction (P>0.05). Before incisor retraction, the oropharyngeal volume and mCSA were (7 580±622) mm(3) and (217±40) mm(2), respectively, and the hypopharyngeal volume and mCSA were (2 564±162) mm(3), and (239±43) mm(2), respectively. After incisor retraction, the volumes of oropharynx and hypopharynx were (6 885±601) mm(3) and (2 535±156) mm(3), respectively, and mCSA of oropharynx and hypopharynx were (197±37) mm(2) and (236±42) mm(2), respectively. The volume and mCSA of oropharynx and hypopharynx were significantly decreased after incisor retraction (P<0.05). The greatest changes in pharyngeal volume and mCSA occurred in the oropharynx. In addition, the LP/AP of oropharynx after incisor retraction was changed from 1.9±0.6 to 2.1±0.7, which was significantly increased compared with the levels before incisor retraction (P<0.05). After simulation of pharyngeal airflow, the oropharyngeal P(min), hypopharyngeal P(max) and P(min) were (-13.7±4.3), (-8.3±3.8) and (-42.8±9.5) Pa, respectively, whereas the values turned to (-16.4±6.5), (-11.9±3.6) and (-46.0±11.0) Pa, respectively after incisor retraction, which was significantly reduced (P<0.05). △P of oropharynx was significantly increased from (42.7±10.1) Pa to (45.2±13.0) Pa after incisor retraction (P<0.05) and the variation of oropharyngeal △P was negatively correlated with the variation of V and mCSA in oropharynx before and after incisor retraction (r=-0.681, P=0.001; r=-0.844, P=0.000). Conclusions: The oropharynx was constricted and the pharyngeal resistance was increased after incisor retraction in adult class Ⅰ patients with bimaxillary protrusion. A comprehensive and systematic evaluation of the pharyngeal morphology and ventilatory function were very important for making a scientific and rational clinical treatment plan.

Combined use of etanercept and MTX restores CD4⁺/CD8⁺ ratio and Tregs in spleen and thymus in collagen-induced arthritis.

OBJECTIVE: To further explore the mechanism of etanercept (ENT, rhTNFR:Fc) and methotrexate (MTX) in the combined treatment of rheumatoid arthritis (RA), we investigated whether thymic and splenic T-cell subsets and their related cytokines imbalance could be restored by ETN/MTX treatment. METHODS: The effect of ETN/MTX on collagen-induced arthritis (CIA) was evaluated by arthritis scores, joint and spleen histopathology, as well as indices of thymus and spleen. T lymphocytes proliferation was determined by [(3)H]-TdR incorporation. Levels of TNF-α, LT-α, IL-1ß, RANKL, IL-10, IL-17, IFN-γ and IL-6 were detected by enzyme linked immunosorbent assay. The subsets of T lymphocytes including CD4(+), CD8(+), CD3(+)CD4(+), CD4(+)CD25(+), CD4(+)CD62L(+) and CD4(+)CD25(+)Foxp3(+) cells were quantified using flow cytometry. RESULTS: Combined administration of ETN/MTX significantly inhibited the proliferation of T lymphocytes, decreased serum IL-6, TNF-α, IL-1ß, RANKL and macrophage supernatant IL-17, LT-α, increased serum IFN-γ and macrophage supernatant IL-10. Moreover, the combined administration could restore CD4(+)/CD8(+) ratio and Treg cells of CIA thymus and spleen. CONCLUSION: Taken together, our findings suggest that ENT/MTX may modify the abnormal T lymphocytes balance from central to peripheral lymphoid organs, which may partially, explained the mechanism of the combined administration.

A significant expansion of CD8+ CD28- T-suppressor cells in adult-to-adult living donor liver transplant recipients.

BACKGROUND: The appearance of human regulatory CD8(+) CD28(-) T-suppressor (Ts) cells has been associated with a reduced need for maintenance immunosuppression in cadaveric heart- kidney transplant recipients and pediatric liver-intestine transplant recipients. However, few data are available in adult-to-adult living donor liver transplantation (A-A LDLT). MATERIALS AND METHODS: To study the population of CD8(+) CD28(-) Ts cells in A-A LDLT, we performed flow cytometry on whole blood specimens obtained from 20 transplant recipients, 18 end-stage liver disease patients, and 20 normal controls. Meanwhile, we measured the trough levels of immunosuppressants and monitored graft function in transplant recipients. We retrospectively reviewed the clinical data of the 20 recipients. RESULTS: A significant expansion of CD8(+) CD28(-) Ts cells was observed among recipients of A-A LDLT as compared with a disease control group (P = .000) or healthy individuals (P = .000). All recipients were free of acute cellular rejection episodes. During the follow-up period, no grafts were lost due to acute or chronic rejection. CONCLUSION: Expansion of CD8(+) CD28(-) Ts cells in A-A LDLT seemed to be associated with a decreased occurrence of acute or chronic rejection and sustained good graft function. Based on our low dosages of immunosuppressants for recipients of A-A LDLT, we suggest that this strategy may promote expansion of CD8(+) CD28(-) Ts cells, which can conversely maintain the low immunosuppressant dosages.

Initial clinical effect of intraportal insulin administration on liver graft regeneration in adult patients underwent living donor right lobe liver transplantation.

OBJECTIVE: Insulin is one factor responsible for hepatotrophic regeneration in animal models. This study assessed the clinical effects of intraportal administration of insulin on liver graft regeneration in adult patients undergoing right lobe living donor liver transplantation (LDLT). METHODS: Between July 2005 and September 2007, 19 right lobe LDLT adult recipients voluntarily received posttransplant intraportal insulin administration. The present study describes 15 patients without postoperative vascular and bile duct complications, with more than 1 month survival and with complete clinical data who were enrolled to receive intraportal insulin therapy (group I; n = 15). Another consecutive 15 right lobe LDLT adult recipients without any stimulation regeneration who met the same criteria were enrolled in as noninsulin therapy control group (group NI; n = 15). Group I recipients were treated postoperatively with intraportal insulin infusion, as follows. An 18-gauge catheter was inserted into right gastro-omental vein during surgery, to administer regular insulin just after the operation at the rate of 2 U/h for 1 week. Graft volume (GV) was measured by computed tomography on postoperative days (POD) 7 and 30. Liver functions and serum insulin levels were also measured at POD 7 and POD 30. The liver graft regeneration rate was defined as ratio of posttransplant GV/harvested GV and posttransplant graft-to-recipient weight ratio (GRWR)/operative GRWR. RESULTS: The rate defined as ratio of POD 7 GV/harvested GV among group I was significantly greater than that of group NI (186.07 +/- 35.40% vs 160.61 +/- 22.11%; P < .05). The rate defined as ratio of POD 7 GRWR/operation GRWR was also significantly higher in group I than group NI (178.95 +/- 35.84% vs 156.56 +/- 18.53%; P < .05), whereas there was no significant difference in terms of regeneration rates at 1 month post-LDLT. Intraportal insulin administration may significantly downregulate POD 7 total bilirubin, aspartate aminotransferase, and alanine aminotransferase levels (P < .05). These results suggested that intraportal insulin administration augmented liver regeneration during the first postoperative week by improving hepatic function in LDLT recipients.

Preliminary experience with indications for liver transplantation for hepatolithiasis.

OBJECTIVE: The aim of this study was to explore the indications for liver transplantation among patients with hepatolithiasis. PATIENTS AND METHODS: Data from 1,431 consecutive patients who underwent surgical treatment from January 2000 to December 2006 were retrospectively collected for analysis. Surgical procedures included T-tube insertion combined with intraoperative cholangioscopic removal of intrahepatic stones, hepatectomy, cholangiojejunostomy, and liver transplantation. RESULTS: Nine hundred sixty-one patients who had a stone located in the left or right intrahepatic duct underwent hepatectomy or T-tube insertion combined with intraoperative cholangioscopic removal of intrahepatic stones. The rate of residual stones was 7.5%. Four hundred seventy patients who had a stone located in the bilateral intrahepatic ducts underwent surgical procedures other than liver transplantation; the rate of residual stones was 21.7%. Only 15 patients with hepatolithiasis underwent liver transplantation; they all survived. According to the degree of biliary cirrhosis, recipients were divided into 2 groups: a group with biliary decompensated cirrhosis (n = 7), or group with compensated cirrhosis or no cirrhosis (n = 8). There were significant differences in operative times, transfusion volumes, and blood losses between the 2 groups (P < .05). In the first group, 6 of 7 patients experienced surgical complications, and in the second, 8 recipients recovered smoothly with no complications. Health status, disability, and psychological wellness of all recipients (n = 15) were significantly improved at 1 year after transplantation compared with pretransplantation (P < .05). CONCLUSIONS: Liver transplantation is a possible method to address hepatolithiasis and secondary decompensated biliary cirrhosis or difficult to remove, diffusely distributed intrahepatic duct stones unavailable by hepatectomy, cholangiojejunostomy, and choledochoscopy.

University of California at San Francisco criteria can be applied to living donor liver transplantation for hepatocellular carcinoma: single-center preliminary results in 27 patients.

BACKGROUND: Living donor liver transplantation (LDLT) can provide life-saving therapy for many patients with hepatocellular carcinoma (HCC), who otherwise would succumb due to tumor progression. However, donor risk must be balanced against potential recipient benefit. METHODS: From January 2002 to December 2006, a total of 27 LDLT were performed for HCC patients in our center, including 25 right lobe grafts, and 2 dual grafts. Twenty-four (88.89%) met the University of California at San Francisco (UCSF) criteria, whereas 3 (11.11%) did not. RESULTS: Of our 29 donors, the overall complication rate was 17.24%. Two (6.90%) experienced major complications including intra-abdominal bleeding and portal vein thrombosis in 1, respectively; 3 (10.34%) experienced minor complications: wound steatosis, pleural effusion, and transient chyle leakage in 1, respectively. We did not observe any donor mortality; all donors fully recovered and returned to their previous occupations. No recipient developed small-for-size syndrome. The overall HCC patient survival rates at 1- and 3-years were 84.01% and 71.40%, respectively, similar to those of patients undergoing LDLT for various nonmalignant diseases during the same period (P > .05). CONCLUSIONS: Although further study is needed to fully assess the risks and benefits of LDLT for both HCC patients and donors, our preliminary results suggested that LDLT offered an acceptable chance and duration of survival for HCC patients. It was not only a relatively safe procedure provided that every effort was taken to minimize donor morbidities, but also beneficial for HCC recipients.

Arterial complications after living-related liver transplantation: single-center experience from West China.

Vascular complications after liver transplantation remain a major source of morbidity and mortality for recipients. In particular, patients receiving living-related liver transplantation (LRLT) experience a higher rate of vascular complications owing to the complex vascular reconstruction. Between July 2001 and December 2005, LRLTs were performed in our center on 33 patients with end-stage liver diseases. The 23 men and 10 women had a mean age of 32.6 +/- 11.3 years (range = 5 to 58 years). Of the 33 patients, the percentage of vascular complications was 9.09% (3 cases), including hepatic arterial thrombosis (HAT), hepatic arterial stenosis (HAS), or hepatic artery pseudoaneurysm (HAP) in one patient, respectively. No portal vein or hepatic vein complication occurred in our patients. Thrombectomy was performed in the patient with thrombosis. The patient with stenosis was treated with balloon angioplasty and endoluminal stent placement. The pseudoaneurysm was also successfully embolized to restore the blood flow toward the donor liver. Mean follow-up for all patients after LRLT was 18.0 +/- 5.4 months. The overall postoperative 30-day mortality rate was 6.06% (2/33). The 1-year survival rate was 86.36% in 22 patients with benign diseases and 72.73% in 11 patients with malignant diseases. However, no death was associated with vascular complications. Careful preoperative evaluation and intraoperative microsurgical technique for hepatic artery reconstructions are the keys to prevent vascular complications following LRLT. Immediate surgical intervention is required for acute vascular complications, whereas late complications may be treated by balloon angioplasty and endoluminal stent placement. Embolization may be a safe and effective approach in the treatment of a pseudoaneurysm of the hepatic artery.

Surgical procedures for management of right portal venous branching in right lobe living donor liver transplantation.

OBJECTIVE: This study sought to describe the surgical management of right portal venous (PV) branches encountered among 104 cases of right lobe living donor liver transplantation (LDLT). METHODS: From January 2002 to September 2007, we performed 104 cases of right-lobe LDLT including 11-donors who had anomalous right portal venous branches (APVB). One recipient had PV sponginess hemangioma. The donor right PV branches were type I in 93 cases, type II (trifurcation) in nine cases, and type III in two cases. Except one narrow bridge of tissue excision, the PV branches were transected on the principal of donor priority: PV branches were excised approximately 2 to 3 mm from the confluence while leaving the donor's main portal vein and confluence intact. In type II APVB, donor PV branches were obtained with two separate openings in six cases; with two separate openings joined as a common orifice at the back table in two cases, with one common opening with a narrow bridge of tissue in one case. In type III APVB, the donor right anterior and posterior PV branches were obtained with separate openings. The donor right PV branches with one common opening in 92 cases of type I PV branches and a joined common orifice in three cases of type II APVB were anastomosed to the recipient's main portal vein or to right branching. As the unavailable recipient PV for sponginess hemangioma, one case of type I right PV branches was end-to-end anastomosed to one of the variceal lateral veins of about 1 cm diameter in a pediatric patient. The PV were reconstructed as double anastomoses in six type II APVB and in one type III APVB obtained with two separate PV openings. In the another type III APVB reconstruction, we successfully utilized a novel U-shaped vein graft interposition. RESULTS: The type II APVB donor receiving a narrow bridge of portal vein tissue excision developed portal vein thrombosis on the third postoperative day and underwent reexploration for thrombectomy. There were no vascular complications, such as portal vein thrombosis or stricture among other donors or all recipients. The velocity of blood flow in the U-graft was normal. The anastomosis between the type I donor right portal vein and recipient variceal lateral vein was unobstructed. CONCLUSION: Right PV branches should be excised on the principal of donor priority while leaving the donor's main portal vein and confluence intact. Single anastomoses was the fundamental procedure of right branch reconstruction. Double anastomoses could be used as the main management for type II and type III APVB reconstruction. U-graft interposition may be a potential procedure for type III APVB reconstruction. Single anastomoses between the donor right portal vein and the recipient variceal lateral vein may be performed when recipient portal vein is unavailable. These innovations for excision and reconstruction of right PV branches were feasible, safe, and had good outcomes.

Safety of donor in adult-to-adult living donor liver transplantation using right lobe graft.

BACKGROUND: The growing gap between the number of patients awaiting liver transplantation and available organs has continued to be the primary issue facing the transplant community. To overcome the waiting list mortality, living donor liver transplantation has become an option, in which the greatest concern is the safety of the donor, especially in adult-to-adult living donor liver transplantation (A-A LDLT) using a right lobe liver graft. OBJECTIVE: We evaluated the safety of donors after right lobe liver donation for A-A LDLT performed in our center. METHODS: From January 2002 to March 2006, 26 patients underwent A-A LDLT using right lobe liver grafts in our center. Seven donors were men and 19 were women (range, 19-65 years; median age, 38 years). The right lobe liver grafts were obtained by transecting the liver on the right side of the middle hepatic vein without interrupting the vascular blood flow. The mean follow-up time for these donors was 9 months. RESULTS: These donor residual liver volumes ranged from 30.5% to 60.3%. We did not experience any donor mortality. Two cases (7.69%) experienced major complications: intra-abdominal bleeding and portal vein thrombosis in one each and three (11.54%), minor ones: wound steatosis in two, and transient chyle leak in one. All donors were fully recovered and returned to their previous occupations. CONCLUSIONS: A-A LDLT using a right lobe liver graft has become a standard option. The donation of right lobe liver for A-A LDLT was a relatively safe procedure in our center.

Absence of evidence for allelic loss or allelic gain for ERCC1 or for XPD in human ovarian cancer cells and tissues.

We have previously reported on mRNA expression of ERCC1, XPA and XPD in human ovarian cancer cells and tissues. Several factors can influence mRNA expression for any given gene. Alterations in gene copy number for ERCC1 and/or XPD have been reported to occur in malignant glioma specimens. Human ovarian cancer cell lines and tissues were therefore examined for evidence of altered gene copy number in selected genes within the nucleotide excision repair (NER) pathway. Six ovarian cancer cell lines were studied: A2780, A2780/CP70, SKOV3, MCAS, QvCar3 and Caov4. Cellular sensitivity to cisplatin varies by more than 1 log between some of these cells. In each of these cell lines, the genes examined included ERCC1, XPA, XPB, XPD, XPG, CSB and p53. Genomic DNA was also extracted from ovarian cancer specimens taken from 22 patients and assessed for evidence of allelic loss and/or allelic gain for ERCC1 and XPD. Twelve of the clinical specimens were from patients with platinum-sensitive tumors and ten were from patients with platinum-resistant tumors. In no case could we demonstrate a reproducible variation in gene copy number in any cell line. Among the human tissues studied, there was one case of allelic gain out of 22 specimens. We therefore conclude that alterations in gene copy number is not a common event in human ovarian cancer. Other mechanisms must be invoked to explain differences in mRNA expression for these genes.

[Graft-versus-host disease and xenotransplantation].

OBJECTIVE: The pathogenesis, mechanism, manifestation and diagnosis of graft-versus-host disease(GVHD) are reviewed in this article. METHODS: The relevant articles in recent public magazines were reviewed and summarized. RESULTS: It was indicated that GVHD occurred in the conditioned recipients in animal experiments and clinical transplantations. Humoral and cellular factors were involved in GVHD, which could be diagnosed and classified according to their characteristics. CONCLUSION: As a kind of interactions between the host and donor, GVHD are severely harmful to the host. It may also occur in xenotransplantation, where GVHD can be utilized in the studies on transplant immunology, oncology etc. Xenogeneic GVHD is receiving more and more attentions.

Adjusting the evaluation limit for broad-band whole-body vibration.

The vibration levels of 87 axes in 29 conventional vehicles were measured, recorded, and analyzed. The mean deviation of the overall frequency-weighted vibration levels (Lw) and the greatest single one-third octave band frequency-weighted vibration levels (Lwi-max) in corresponding axes were statistically calculated. The results showed that the vehicle vibrations were broad-band vibrations. The mean deviation of Lw - Lwi-max is 6 dB. This article suggests a 6 dB value as an appropriate adjustment value for evaluating broad-band whole-body vibrations of vehicles when using the most sensitive limits given in International Organization for Standardization document 2631/1.