1.Outcomes of Mandibular Reconstruction Using Free Flap After Head and Neck Cancer Resection and Approaches for Improvement
Unubold E ; Denis S ; Odontungalag Ts ; Yanjinlkham M ; Amarsanaa G ; Tsetsegkhen N ; Gantsetseg G ; Battsengel B ; Gan-Erdene B ; Bat-Erdene M ; Bulganchimeg S ; Ganbaatar Yu ; Odkhuu J ; Enkh-Orchlon B
Mongolian Journal of Health Sciences 2025;87(3):82-89
Background:
Reconstruction of mandibular and maxillary defects resulting
from malignant tumors has remained a complex challenge in recent years. Defects
caused by tumors—as well as trauma, inflammatory diseases, and congenital
anomalies—lead to impaired essential functions such as mastication,
swallowing, and speech. Prior to the 1950s, reconstruction of maxillofacial
hard tissue was not commonly performed. Instead, metal plates were used to
reestablish bony continuity, and surrounding tissues were utilized to close soft
tissue defects, without effectively restoring function.
With modern advances in three-dimensional (3D) virtual planning, it is now possible
to accurately plan free bone flaps for reconstructing jaw defects. During
surgery, manually bending reconstruction plates to fit donor bone precisely is
often not feasible. Preoperative 3D planning allows for precise fabrication of
surgical guides and fixation plates, improving accuracy and significantly reducing
operative time. Additionally, incorporating dental implant planning into
the reconstruction process facilitates restoration of both structural and functional
outcomes.
Aim:
To evaluate the outcomes of mandibular defect reconstruction using
scapular free flaps in Mongolia and explore potential approaches to optimize
the technique.
Materials and Methods:
This was a case study series. Data from reconstructive
surgeries performed at the National Cancer Center of Mongolia, Central
Dental Hospital, and the Mongolia-Japan Hospital were collected. Variables
included patient age and sex, etiology of the mandibular defect, size of the
scapular bone segment, operative time, ischemia time of the free flap, number
of vascular anastomoses performed, and pedicle length.
For 3D planning, CT scans of the patient's head and lower limb (slice thickness
<1 cm) were used to generate 3D models via the 3D Slicer software. Cutting
guides for the mandible and scapula (ASIGA), as well as the reconstruction
models (AMS), were printed using a 3D printer.
Results:
A total of 400 free flap reconstructions were performed during the
study period. Of these, 29 cases involved reconstruction of mandibular defects
using scapular free flaps. The mean age of patients was 40.0 ± 18.3 years,
with 52% (15 patients) being female. The etiologies of the defects included
malignant tumors (13 cases, 45%), benign tumors (6 cases, 21%), and pre-existing
defects (10 cases, 34%).
In one case, tumor resection and mandibular reconstruction were performed
using 3D planning. The total operative time was 9 hours and 30 minutes, and
the ischemia time was 2 hours and 40 minutes.
Conclusion
Between 2012 and 2025, a total of 29 mandibular reconstructions
using scapular free flaps were performed in Mongolia. Traditional reconstruction
methods were associated with prolonged ischemia time. The use of
3D surgical planning has shown potential in significantly reducing ischemia
time and improving surgical outcomes.
2.Screening for asymptomatic cardiac ventricular dysfunction in diabetic subjects
Tsolmon U ; Chingerel Kh ; Burmaa B ; Sumiya Ts ; Pagmadulam S ; Chuluuntsetseg O ; Enkhjargal Yu
Mongolian Journal of Health Sciences 2025;86(2):55-59
Background:
Type 2 diabetes has increased risk of heart failure 2-4 times more than those in non-diabetic subjects. The
early detection of asymptomatic ventricular dysfunction by using NT-pro BNP test in diabetic patients is the best strategy
for decreasing morbidity and mortality of heart failure.
Aim:
The aims of this study were to detect asymptomatic cardiac ventricular dysfunction by using NT-pro BNP test in
subjects with type 2 diabetes and to define the factors associated with elevated NT-proBNP.
Materials and Methods:
This cross-sectional study was included diabetic and non diabetic subjects aged from 35- to 64
years, who had no clinical symptoms of heart failure. Cardiovascular risk factors were detected by clinical examinations.
NT-pro BNP determination was performed on an immunoassay analyzer (FIA1100, Getein Bio Medical Inc, China),
which uses reagent strip to obtain quantitative NT-pro BNP results in plasma. The cut-off point for NT-pro BNP was 300
pg/ml.
Results:
A total of 536 subjects without clinical symptoms of heart failure were included in the study of which, 150 were
diabetic and 386 were non diabetic. The mean age was 52.8 ± 7.8 years and 281 (52.4%) were females. Cardiac ventricular
dysfunction was detected in 7.3% of diabetic and 5.2% of non diabetic subjects. Cardiac ventricular dysfunction in
diabetic subjects was increased with age and non-significantly higher in females than in males (8.3% vs 6.4%, p>0.05). In
the logistic regression analysis, uncontrolled hypertension (OR 3.80, 95% CI 1.07–13.44), long duration of disease (OR
5.30, 95% CI 1.36-20.66), and ageing (OR 5.40, 95% CI 1.29–22.88) were significantly correlated cardiac ventricular
dysfunction in subjects with type 2 diabetes.
Conclusion
Cardiac ventricular dysfunction in subjects with type 2 diabetes was detected 1.4 times more than those
in non diabetic subjects. The likelihood of positive NT-pro BNP test in subjects with type 2 diabetes was independently
(p<0.05) associated with advanced age, uncontrolled hypertension and long duration of diabetes.
3.Synthesis and identification of RGD-modified tumstatin peptide 19 and its inhibitory effect on proliferation, migration, and invasion of liver cancer SK-Hep-1 cells
WANG Shun1a,2 ; YU Jiaqi1b ; HU Yue1a ; ZHAO Zhenglin1a ; NIU Shudong1c ; JIA Di1a ; YANG Chao1a ; YI Tonghui1d ; LI Shuyan1a
Chinese Journal of Cancer Biotherapy 2024;31(9):849-856
[摘 要] 目的:探讨精氨酸-甘氨酸-天冬氨酸(RGD)修饰对肿瘤抑素19肽(T-19)抗肝癌活性的影响,比较分析T-19及RGD修饰的T-19(RGD-T-19)对肝癌SK-Hep-1细胞增殖、侵袭和迁移能力的影响。方法:用Fmoc固相法合成T-19及RGD-T-19,用高效液相色谱仪和质谱进行分离、鉴定。常规培养SK-Hep-1细胞,用0、50、100、150、200、250 mg/mL的T-19及RGD-T-19分别处理细胞,分为0 mg/mL(对照)组、50 mg/mL组、100 mg/mL组、150 mg/mL组、200 mg/mL组、250 mg/mL组。CCK-8法、克隆形成实验、划痕愈合实验和Tanswell小室实验、WB法和qPCR法分别检测SK-Hep-1细胞的增殖、迁移、侵袭能力,以及环氧合酶-2(COX-2)、基质金属蛋白酶-2(MMP-2)、MMP-9、组织基质金属蛋白酶抑制剂-1(TIMP-1)、TIMP-2蛋白和MMP-1、MMP-2 mRNA的表达。结果:经质谱鉴定,用Fmoc固相法合成的T-19及RGD-T-19纯度高。T-19和RGD-T-19均能显著抑制SK-Hep-1细胞的增殖、迁移、侵袭能力,抑制COX-2蛋白、MMP-2和MMP-9蛋白及mRNA的表达、促进TIMP-1、TIMP-2蛋白的表达(P < 0.05, P < 0.01, P < 0.001),RGD-T-19的抑制或促进效应均明显强于T-19(均P < 0.05)。结论:利用Fmoc固相法合成了纯度高、活性好的T-19及RGD-T-19,两种肽均能抑制SK-Hep-1细胞增殖、侵袭和迁移能力,RGD-T-19作用明显强于T-19。
5.Antihyperuricemic activity of polar fractions of Pili (Canarium ovatum) leaves
Marione Thea B. Rodriguez ; Gracia Fe B. Yu ; Marilou G. Nicolas ; Noel S. Quiming
Philippine Journal of Health Research and Development 2022;26(CAS Issue):31-40
Background:
One of the causes of inflammatory arthritis is excessive production of uric acid or hyperuricemia. It is a painful disease that is treated with a commercial xanthine oxidase inhibitor to decrease uric acid synthesis. However, the treatment is associated with adverse side effects and thus, there is interest in medicinal plants that could have similar therapeutic effects with minimal side effects. There are many reported indigenous plants and trees in the Philippines that are reported to have therapeutic and bioactive compounds. One such plant is Canarium ovatum or locally called pili. This study aimed to determine the antihyperuricemic activity of the ethanolic extract of the leaves of C. ovatum.
Objective:
Determine the antihyperuricemic activity of the crude ethanolic extract of C. ovatum leaves and its partially purified fractions through inhibition of xanthine oxidase and its effect on the blood uric acid level of oxonate-induced hyperuricemic mice.
Methodology:
The crude ethanol extract from C. ovatum leaves and its partially purified fractions obtained through column chromatography were tested for their in vitro xanthine oxidase (XO) inhibitory activity by measuring spectrophotometrically the uric acid formation from xanthine as the substrate. The crude ethanol extract and the fraction with the most XO inhibitory activity were then tested for their in vivo XO inhibitory activity in oxonate-induced hyperuricemic mice by measuring their blood uric acid levels using uric acid test strips.
Results:
The crude ethanolic extract of C. ovatum leaves at 100ppm showed 83.62±2.05% in vitro inhibition of XO while the most active fraction showed 80.30±4.00% inhibition. Both were comparable (p>0.05) to the positive control, allopurinol, which showed 91.47±5.64% inhibition. In vivo, the crude extract and the fraction that showed the highest XO inhibitory activity at 200 mg/kg significantly (p<0.01 and p<0.05) respectively reduced the serum uric acid levels of the hyperuricemic mice one hour after induction as compared to the negative control. Moreover, their antihyperuricemic activity were not statistically significant as compared to that of allopurinol (p<0.0001).
Conclusion
The crude ethanolic extract of C. ovatum leaves and its most active fraction showed statistically significant in vitro xanthine oxidase inhibition and in vivo antihyperuricemic activity. The activities shown by both crude and active fraction were not statistically different from that determined for allopurinol. Therefore, further studies can be conducted to isolate the most active compound and study its pharmacokinetic properties.
Xanthine Oxidase
;
Uric Acid
;
Allopurinol
6.Application of sensory integration therapy in cerebral palsy rehabilitation: a systematic review
Xinlu YU ; Xin LI ; Tingting YANG ; Bo ZHANG ; Yuxia FENG ; Wei PANG
Chinese Journal of Rehabilitation Theory and Practice 2022;28(2):183-189
Objective To systematically review the research progress of sensory integration therapy in the rehabilitation of children with cerebral palsy. Methods The literatures related to the application of sensory integration therapy in the rehabilitation of children with cerebral palsy was retrieved from Web of Sciences, PubMed, CNKI, Wanfang data, and VIP databases until November 27, 2021, using subject search. And the contents of the literatures were extracted to review the implementation plan of sensory integration therapy and the effectiveness of its application in the rehabilitation of children with cerebral palsy. Results Six literatures were included. The main focus was on the research of sensory integration therapy on postural control, gross motor function, intelligence level and cognitive function, and treatment modalities in children with cerebral palsy. Conclusion Sensory integration therapy is effective on motor function, posture control and intelligence in children with cerebral palsy. To maximize the effect of sensory integration therapy, a suitable rehabilitation treatment plan should be formulated according to the degree of sensory integration disorder and the age, gender and tolerance of children.
7.YouTube as a source of patient education information for elbow ulnar collateral ligament injuries: a quality control content analysis
Jonathan S YU ; Joseph E MANZI ; John M APOSTOLAKOS ; James B CARR II ; Joshua S DINES
Clinics in Shoulder and Elbow 2022;25(2):145-153
Background:
While online orthopedic resources are becoming an increasingly popular avenue for patient education, videos on YouTube are not subject to peer review. The purpose of this cross-sectional study was to evaluate the quality of YouTube videos for patient education in ulnar collateral ligament (UCL) injuries of the elbow.
Methods:
A search of keywords for UCL injury was conducted through the YouTube search engine. Each video was categorized by source and content. Video quality, reliability, and accuracy were assessed by two independent raters using five metrics: (1) Journal of American Medical Association (JAMA) benchmark criteria (range 0–4) for video reliability; (2) modified DISCERN score (range 1–5) for video reliability; (3) Global Quality Score (GQS; range 1–5) for video quality; (4) ulnar collateral ligament-specific score (UCL-SS; range 0–16), a novel score for comprehensiveness of health information presented; and (5) accuracy score (AS; range 1–3) for accuracy.
Results:
Video content was comprised predominantly of disease-specific information (52%) and surgical technique (33%). The most common video sources were physician (42%) and commercial (23%). The mean JAMA score, modified DISCERN score, GQS, UCL-SS, and AS were 1.8, 2.4, 1.9, 5.3, and 2.7 respectively.
Conclusions
Overall, YouTube is not a reliable or high-quality source for patients seeking information regarding UCL injuries, especially with videos uploaded by non-physician sources. The multiplicity of low quality, low reliability, and irrelevant videos can create a cumbersome and even inaccurate learning experience for patients.
8.Research progression on the first-line biological target therapy of advanced
JIANG Zhansheng ; ZHANG Yu ; REN Xiubao ; PAN Zhanyu
Chinese Journal of Cancer Biotherapy 2020;27(8):843-851
With the progress of gene detection technology and the speed-up in new drug development, biological target therapy has fully covered the first-line treatment of advanced NSCLC. Immunotherapy has significantly improved the survival of advanced NSCLC patients with negative driven genes, and the median OS reaches about 2 years (15.6-30 months). EGFR is the most common driven
gene. According to different EGFR mutation subtypes (L858R or 19del), different treatment mode (EGFR-TKI single drug, TKI combined with anti-vascular drugs and TKI combined with chemotherapy) is selected as the first-line treatment, which has become a consensus. Depending on the data of median PFS, the treatment efficacy against rare targets is more prominent, which has exceeded the efficacy of standard chemotherap:ALK (alectinib, PFS=34.8 months), ROS1 (ceritinib, PFS=19.3 months), RET (selpercatinib, PFS=18.4 months), BRAF (dabrafenib plus trametinib, PFS=14.6 months), NTRK (larotrectinib, PFS≥12 months) and MET (savolitinib, PFS=9.7
months). In conclusion, the first-line treatment of advanced NSCLC has entered the era of“precision-targeted treatment”based on
different molecular typing, and it has become a consensus that high-throughput sequencing is required for newly diagnosed patients.
9. Correlation between incidence of dengue and climatic factors in the Philippines: An ecological study
Ann Kashmer D. Yu ; Sophia Isabel E. Ytienza ; Airees Mae D. Yu ; Vincent Christopher S. Yu ; Keith Alexius K. Wangkay ; Maria Antonia R. Wong ; Marielle Alyanna B. Zamudio ; Eljine Mae T. Zhang ; Wally D. Yumul ; Zakhira Maye R. Zipagan ; Arianna Krystelle R. Yaranon ; Jake Byron C. Zapanta ; Gija B. Ysip ; Catherine Danielle Duque-Lee
Health Sciences Journal 2020;9(2):60-68
INTRODUCTION:
Dengue continues to be a major health concern in the Philippines. This study aimed to establish trends and correlations between the incidence of dengue and rainfall, humidity and temperature, respectively, in the different regions.
METHODS:
Using 2018 records obtained from DOH and PAGASA, correlations were made between monthly
measurements of climatic factors and the incidence of dengue using Pearson’s r, while maps and interpolations were generated using quantum geographical information system software.
RESULTS:
There was a significant positive but weak correlation between the incidence of dengue and rainfall
(r = 0.379, 95% CI 0.255, 0.491; p < 0.001) and humidity (r = 0.215, 95% CI 0.080, 0.342; p = 0.002).
There was a significant negative but weak correlation between the incidence of dengue and temperature (r = -0.145, 95% CI -0.277, -0.008; p = 0.039). A strong positive correlation was noted between the incidence of dengue, and rainfall and humidity, respectively, in several regions. Multiple regression indicates that rainfall, humidity and temperature are poor predictors of the incidence of dengue (R2 = 0.1436, 0.0461 and 0.0209, respectively).
CONCLUSION
This study showed overall a significant but weak correlation between an increased incidence
of dengue and heavy rainfalls and high relative humidity, and a weak negative correlation for temperature. A high positive correlation of an increased incidence of dengue and heavy rainfalls and high relative humidity was observed in several regions.
Dengue
;
humidity
;
temperature
10.2019 Seoul Consensus on Esophageal Achalasia Guidelines
Hye-Kyung JUNG ; Su Jin HONG ; Oh Young LEE ; John PANDOLFINO ; Hyojin PARK ; Hiroto MIWA ; Uday C GHOSHAL ; Sanjiv MAHADEVA ; Tadayuki OSHIMA ; Minhu CHEN ; Andrew S B CHUA ; Yu Kyung CHO ; Tae Hee LEE ; Yang Won MIN ; Chan Hyuk PARK ; Joong Goo KWON ; Moo In PARK ; Kyoungwon JUNG ; Jong Kyu PARK ; Kee Wook JUNG ; Hyun Chul LIM ; Da Hyun JUNG ; Do Hoon KIM ; Chul-Hyun LIM ; Hee Seok MOON ; Jung Ho PARK ; Suck Chei CHOI ; Hidekazu SUZUKI ; Tanisa PATCHARATRAKUL ; Justin C Y WU ; Kwang Jae LEE ; Shinwa TANAKA ; Kewin T H SIAH ; Kyung Sik PARK ; Sung Eun KIM ;
Journal of Neurogastroenterology and Motility 2020;26(2):180-203
Esophageal achalasia is a primary motility disorder characterized by insufficient lower esophageal sphincter relaxation and loss of esophageal peristalsis. Achalasia is a chronic disease that causes progressive irreversible loss of esophageal motor function. The recent development of high-resolution manometry has facilitated the diagnosis of achalasia, and determining the achalasia subtypes based on high-resolution manometry can be important when deciding on treatment methods. Peroral endoscopic myotomy is less invasive than surgery with comparable efficacy. The present guidelines (the “2019 Seoul Consensus on Esophageal Achalasia Guidelines”) were developed based on evidence-based medicine; the Asian Neurogastroenterology and Motility Association and Korean Society of Neurogastroenterology and Motility served as the operating and development committees, respectively. The development of the guidelines began in June 2018, and a draft consensus based on the Delphi process was achieved in April 2019. The guidelines consist of 18 recommendations: 2 pertaining to the definition and epidemiology of achalasia, 6 pertaining to diagnoses, and 10 pertaining to treatments. The endoscopic treatment section is based on the latest evidence from meta-analyses. Clinicians (including gastroenterologists, upper gastrointestinal tract surgeons, general physicians, nurses, and other hospital workers) and patients could use these guidelines to make an informed decision on the management of achalasia.


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