1.Case-control study on individual osteotomy instrument and conventional total knee arthroplasty for the treatment of knee osteoarthritis.
Hua-chen YU ; Yu ZHANG ; Paul WONG
China Journal of Orthopaedics and Traumatology 2016;29(6):513-516
OBJECTIVETo compare clinical efficacy of individual osteotomy instrument and total knee arthrolplasty (TKA) in treating patients with knee osteoarthritis.
METHODSFrom June 2014 to December 2014, 40 patients with unilateral knee osteoarthritis were randomly divided into two groups and 20 cases were in each group. One group (individual group) were treated with TKA with individual osteotomy instrument,including 5 males and 15 females with an average age of (67.3 ± 6.5) years old; 8 cases on the left side and 12 cases on the right side. Another group (conventional group) were treated with conventional TKA , including 6 males and 14 females with an average age of (66.8 ± 7.3) years old; 9 cases on the left side and 11 cases on the right side. Operative time, blood loss, postoperative HSS score at 6 months, and changes of mechanical alignment before and after operation were analyzed.
RESULTSOperative time in individual group was (79.3 ± 4.7) min, and (83.5 ± 3.2) min in conventional group; blood loss in individual group was (287.1 ± 24.9) ml and (363.4 ± 47.2) ml in conventional group, there were statistical differences between two groups in these two items. There was no significant difference in postoperative HSS score at 6 months between individual group (84.8 ± 3.2) and conventional group (84.2 ± 2.5). Postoperative limb alignment in individual group was (2.8 ± 0.6)°, and (2.8 ± 0.6)° in conventional group, with no significant difference between two groups.
CONCLUSIONTKA with individual osteotomy instrument could reduce operative time and blood loss, but there was no differences in knee function, changes of mechanical alignment compared with TKA.
Adult ; Aged ; Arthroplasty, Replacement, Knee ; methods ; Case-Control Studies ; Female ; Humans ; Knee Joint ; surgery ; Male ; Operative Time ; Osteoarthritis, Knee ; surgery ; Osteotomy ; instrumentation ; methods ; Treatment Outcome
2.Cytotoxic activity of kenaf (Hibiscus cannabinus L.) seed extract and oil against human cancer cell lines
Wong Hua Yu ; Tan Yan Wai ; Tan Ping Chin ; Long Kamariah ; Nyam Lin Kar
Asian Pacific Journal of Tropical Biomedicine 2014;(z1):510-515
Objective: To examine the cytotoxic properties of both the kenaf (Hibiscus cannabinus L.) seed extract and kenaf seed oil on human cervical cancer, human breast cancer, human colon cancer and human lung cancer cell lines.Methods:kenaf seed oil on human cancer cell lines was evaluated by using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide and sulforhodamine B assays. Cell morphological changes were observed by using an inverted light microscope.Results:The in vitro cytotoxic activity of the kenaf (Hibiscus cannabinus L.) seed extract and cancer cell lines. Morphological alterations in the cell lines after KSE and KSO treatment were observed. KSE and KSO possessed effective cytotoxic activities against all the cell lines been selected.Conclusions:KSE and KSO could be potential sources of natural anti-cancer agents. Further The kenaf seed extract (KSE) exhibited a lower IC50 than kenaf seed oil (KSO) in all of the investigations on using kenaf seeds for anti-proliferative properties are warranted.
4.Chemoprevention of gastric cancer: current status.
Harry Hua-Xiang XIA ; Benjiamin Chun-Yu WONG ; Shiu-Kum LAM
Chinese Medical Journal 2003;116(1):5-10
The development of gastric cancer is a multi-factor process. In addition to genetic factors, environmental factors including smoking, low gastric acidity, excessive intake of salt or salty food and low consumption of fresh fruits and vegetables all contribute to the development of gastric cancer. Of particular interest, epidemiological and experimental studies have demonstrated that Helicobacter pylori (H. pylori) infection is causally linked to gastric cancer. Most studies using micronutrient supplementation have failed to demonstrate any preventive effect against the development of gastric cancer. The use of non-steroidal anti-inflammatory drugs has been consistently observed to protect against the development of gastric cancer. Recently, eradication of H. pylori infection by a chemopreventative approach is being studied in a number of trials. Studies using precancerous lesions as an end point of the treatment have produced conflicting and mostly negative results. Trials using cancer as an end point are being cautiously carried out in high-risk populations, and will provide the definitive answer to this important question. In the end, vaccination may be proven to be the optimal strategy in human for the management of H. pylori infection and prevention of gastric cancer.
Anti-Inflammatory Agents, Non-Steroidal
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therapeutic use
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Anticarcinogenic Agents
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therapeutic use
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Dietary Supplements
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Helicobacter Infections
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complications
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drug therapy
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prevention & control
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Humans
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Stomach Neoplasms
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etiology
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prevention & control
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Vaccination
5.Effects of octreotide on expression of L-type voltage-operated calcium channels and on intracellular Ca2+ in activated hepatic stellate cells.
Hui-guo DING ; Bao-en WANG ; Ji-dong JIA ; Hua-xiang Harry XIA ; Chun-yu Benjamin WONG ; Chun-hui ZHAO ; Yan-lin XU
Chinese Medical Journal 2004;117(6):913-916
BACKGROUNDThe contractility of hepatic stellate cells (HSCs) may play an important role in the pathogenesis of cirrhosis with portal hypertension. The aim of this study was to research the effects of octreotide, an analogue of somatostatin, on intracellular Ca2+ and on the expression of L-type voltage-operated calcium channels (L-VOCCs) in activated HSCs, and to try to survey the use of octreotide in treatment and prevention of cirrhosis with portal hypertension complications.
METHODSHSC-T6, an activated HSCs line, was plated on small glass coverslips in 35-mm culture dishes at a density of 1 x 10(5)/ml, and incubated in DMEM media for 24 hours. After the cells were loaded with Fluo-3/AM, intracellular Ca2+ was measured by Laser Scanning Confocal Microscopy (LSCM). The dynamic changes in activated HSCs of intracellular Ca2+, stimulated by octreotide, endothelin-1, and KCl, respectively, were also determined by LSCM. Each experiment was repeated six times. L-VOCC expression in HSCs was estimated by immunocytochemistry.
RESULTSAfter octreotide stimulation, a significant decrease in the intracellular Ca2+ of activated HSCs was observed. However, octreotide did not inhibit the increases in intracellular Ca2+ after stimulation by KCl and endothelin-1. Moreover, octreotide did not significantly affect L-VOCC expression. These results suggest that neither L-VOCC nor endothelin-1 receptors in activated HSCs are inhibited by octreotide.
CONCLUSIONSOctreotide may decrease portal hypertension and intrahepatic vascular tension by inhibiting activated HSCs contractility through decreases in intracellular Ca2+. The somatostatin receptors in activated HSCs may be inhibited by octreotide.
Calcium ; analysis ; Calcium Channels, L-Type ; analysis ; Cells, Cultured ; Hepatocytes ; chemistry ; cytology ; drug effects ; Microscopy, Confocal ; Octreotide ; pharmacology
6.Use of glecaprevir/pibrentasvir in patients with chronic hepatitis C virus infection and severe renal impairment
Desmond Y. H. YAP ; Kevin S. H. LIU ; Yu-Chun HSU ; Grace L. H. WONG ; Ming-Chang TSAI ; Chien-Hung CHEN ; Ching-Sheng HSU ; Yee Tak HUI ; Michael K. K. LI ; Chen-Hua LIU ; Yee-Man KAN ; Ming-Lung YU ; Man-Fung YUEN
Clinical and Molecular Hepatology 2020;26(4):554-561
Background/Aims:
Data on treatment efficacy and safety of glecaprevir/pibrentasvir (GLE/PIB) for chronic hepatitis C virus (HCV) infection in Asian patients with severe renal impairment are limited. This study aimed to study the treatment and side effects of GLE/PIB in these patients infected with non-1 genotype (GT) HCV.
Methods:
We prospectively recruited patients with Child’s A cirrhosis and eGFR <30 mL/min/1.73 m2 in Hong Kong and Taiwan during 2017–2018 to receive GLE/PIB treatment.
Results:
Twenty-one patients (GT2, n=7; GT3, n=6; and GT6, n=8) received GLE/PIB for 11.2±1.8 weeks. All except one were treatment-naïve. GLE/PIB was initiated in 16 patients while on dialysis (seven on peritoneal dialysis [PD] and nine on hemodialysis) and in five patients before dialysis. One patient died of PD-related peritonitis during treatment and two were lost to follow up. The SVR12 rate in the remaining 18 patients was 100%. All patients achieved undetectable levels at 4-, 12-, 24- and 48-week after treatment. Patients with deranged alanine aminotransferase showed normalization after 4 weeks and the response was sustained for 48 weeks. No significant adverse event was observed.
Conclusions
GLE/PIB treatment was associated with high efficacy and tolerability in HCV-infected patients with severe renal impairment.
7.Siegesbeckia Orientalis L. Extract Attenuates Postoperative Cognitive Dysfunction, Systemic Inflammation, and Neuroinflammation.
John Man Tak CHU ; Wei XIONG ; Ke Gang LINGHU ; Yan LIU ; Yan ZHANG ; Guan Ding ZHAO ; Michael G IRWIN ; Gordon Tin Chun WONG ; Hua YU
Experimental Neurobiology 2018;27(6):564-573
A proportion of patients experience acute or even prolonged cognitive impairment after surgery, a condition known as postoperative cognitive dysfunction (POCD). It is characterized by impairment in different cognitive domains and neuroinflammation has been implicated as one of the inciting factors as strategies targeting inflammation tend to improve cognitive performance. Siegesbeckia Orientails L. (S. Orientails) is a common Chinese medicinal herb used for managing chronic inflammatory diseases. We investigated if pretreatment with S. Orientails before surgery confers any neuroprotective effects in postoperative animals in terms of reducing inflammation and mitigating cognitive impairment. Three-month-old male C57BL/6N mice were fed different doses of S. Orientails extract for 14 days before they underwent a laparotomy. After cognitive testing they were sacrificed on postoperative day (POD) 3. Our results showed that animals with extract pretreatment demonstrated memory improvement in a dose-dependent manner compared with control. Further, evidence for the attenuation of systemic and neuroinflammation was found in the pretreated animals, along with the inhibition of inflammatory pathways and significantly reduced tau phosphorylation in the hippocampus. Taken together, these results demonstrated a neuroprotective effect of S. Orientails in postoperative animals, indicating a therapeutic potential of S. Orientails in minimizing POCD and the possibility of utilizing this traditional Chinese medicine perioperatively.
Animals
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Asian Continental Ancestry Group
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Cognition Disorders
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Hippocampus
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Humans
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Inflammation*
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Laparotomy
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Male
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Medicine, Chinese Traditional
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Memory
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Mice
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Neuroprotective Agents
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Phosphorylation
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Plants, Medicinal
8.Cytotoxic activity of kenaf (Hibiscus cannabinus L.) seed extract and oil against human cancer cell lines.
Yu Hua WONG ; Wai Yan TAN ; Chin Ping TAN ; Kamariah LONG ; Kar Lin NYAM
Asian Pacific Journal of Tropical Biomedicine 2014;4(Suppl 1):S510-5
OBJECTIVETo examine the cytotoxic properties of both the kenaf (Hibiscus cannabinus L.) seed extract and kenaf seed oil on human cervical cancer, human breast cancer, human colon cancer and human lung cancer cell lines.
METHODSThe in vitro cytotoxic activity of the kenaf (Hibiscus cannabinus L.) seed extract and kenaf seed oil on human cancer cell lines was evaluated by using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide and sulforhodamine B assays. Cell morphological changes were observed by using an inverted light microscope.
RESULTSThe kenaf seed extract (KSE) exhibited a lower IC50 than kenaf seed oil (KSO) in all of the cancer cell lines. Morphological alterations in the cell lines after KSE and KSO treatment were observed. KSE and KSO possessed effective cytotoxic activities against all the cell lines been selected.
CONCLUSIONSKSE and KSO could be potential sources of natural anti-cancer agents. Further investigations on using kenaf seeds for anti-proliferative properties are warranted.