Linxian County in Henan Province, Northern China is known as the region with the highest incidence and mortality rate of esophageal cancer worldwide. Since 1959, the Henan medical team has conducted field work on esophageal cancer prevention and treatment in Linxian. Through three generations of effort exerted by oncologists over 65 years of research on esophageal cancer prevention and treatment in Linxian, the incidence rate of esophageal squamous cell carcinoma in this area has dropped by nearly 50%, and the 5-year survival rate has increased to 40%, reaching the international leading level. This article aims to summarize the history, present opportunities and new challenges, and explore the experience of esophageal cancer prevention and treatment in Linxian (referred to as the “Linxian experience”), providing reference and guidance to cancer prevention and treatment research in China.

Toxoplasma gondii is a single-celled parasite that infects nearly all warm-blooded animals, including humans (Montoya and Liesenfeld, 2004). It occurs worldwide and can persist for a lifetime in mammals. Humans get infected by eating undercooked meat of animals containing the tissue cysts of this parasite. In immune-competent individuals, T. gondii infection usually does not cause significant clinical symptoms, whereas in pregnant or immunocompromised individuals, T. gondii infection (toxoplasmosis) can cause more serious problems like abortion and even death (Dunn et al., 1999; Wang et al., 2017). A combination of pyrimethamine and sulfadiazine is usually used to treat toxoplasmosis, although it is generally inefficient and causes side effects (Alday and Doggett, 2017). Worse still, there is a lack of vaccines to prevent T. gondii infection in humans or animals.
Toxoplasma/enzymology* ; Animals ; Humans ; Toxoplasmosis ; Mitochondria/enzymology* ; Protozoan Proteins/metabolism*

Insulin-like peptides(ILPs)play a crucial role in the biological processes of nematode metabolism,signal transduction,and developmental processes,representing potential therapeutic targets for nematode infections in animals.In order to explore the specific role of ILPs in nematode development and infection,genome-wide identification,sequence and evolution analysis of the ILPs coding genes were conducted on Haemonchus contortus(H.contortus);transcriptional levels of these ILPs coding genes among developmental stages were determined by a real-time quantitative PCR method;recombinant ILPs were produced in prokaryotic system for polyclonal antibody prep-aration and Western blot analysis;indirect immunofluorescence localization experiment was used to reveal the tissue distribution of ILPs at different developmental stages.It was showed that the number of ILPs coding genes in H.contortus were significantly reduced compared with that of Caenorhabditis elegans,namely three members of ILPs coding genes exhibiting antagonistic fea-tures;the highest transcriptional levels of ILPs coding genes was detected in the infective third stage larvae of H.contortus;ILPs were found dominant in the intestine and hypodermis of the in-fective larvae of this parasitic nematode.In this study,three genes encoding antagonistic ILPs were identified in H.contortus,they might play a role in regulating the development and infection processes.The finding lay a foundation for the study of nematode hypobiosis(larval diapause)in animals and the screening of potential intervention targets.

The clinical data of 13 patients with esophageal dissecans superficials (EDS) induced by paraquat (PQ) in Qilu Hospital from March 2016 to April 2019 were analyzed retrospectively. EDS usually occurs on the 3rd to 9th day after taking poison, and the esophageal mucosa is different in size, color and character, in 10 cases of death, 1 case of pharyngeal pain basically disappeared on the 19th day after EDS onset, but died on the 27th day after taking poison, and 9 cases of death survived 5~19th days after taking poison, the overall cure rate was low; The pharyngeal pain symptoms of 3 surviving patients basically disappeared on day 15, 16 and 17 of EDS, and all patients had no discomfort after eating, and were cured gradually.

The clinical data of 13 patients with esophageal dissecans superficials (EDS) induced by paraquat (PQ) in Qilu Hospital from March 2016 to April 2019 were analyzed retrospectively. EDS usually occurs on the 3rd to 9th day after taking poison, and the esophageal mucosa is different in size, color and character, in 10 cases of death, 1 case of pharyngeal pain basically disappeared on the 19th day after EDS onset, but died on the 27th day after taking poison, and 9 cases of death survived 5~19th days after taking poison, the overall cure rate was low; The pharyngeal pain symptoms of 3 surviving patients basically disappeared on day 15, 16 and 17 of EDS, and all patients had no discomfort after eating, and were cured gradually.

Objective: To explore the glycemic control of newly-diagnosed type 2 diabetes with different levels of baseline body mass index (BMI) after 6 months treatment under the standardized metabolic disease management model. Methods: (1) 163 patients of newly-diagnosed type 2 diabetes were divided into normal weight (BMI 18.5-23.9 kg/m²), overweight (BMI 24.0-27.9 kg/m²), and obese (BMI≥28 kg/m²) groups according to baseline BMI, the blood glucose and lipids levels were compared among 3 groups. (2) The blood glucose levels were compared among 3 groups after 6 months of standardized management. (3) The overweight and obese patients were divided into group weight loss≥5% and group weight loss<5% or weight gain in 6 months. The blood glucose levels were compared. Results: (1) At baseline, overweight and obese groups had higher homeostasis model assessment for insulin resistance and lower high density lipoprotein-cholesterol compared with normal weight group. (2) After 6 months of treatment, HbA_1C and HbA_1C reduction showed no difference among 3 groups (normal, overweight and obese) after adjusted by baseline HbA_1C. The rate of HbA_1C<7% among 3 groups were 77.78%, 83.95%, and 80.43% (P>0.05). (3) After 6 months of treatment, 32.28% overweight and obese patients lost weight by ≥ 5%, while HbA_1Cand HbA_1Creduction showed no difference between 2 groups (weight loss≥5% and weight gain or weight loss<5%) after adjusted by baseline HbA_1C. Both groups achieved good glycemic control [(6.27±1.38 vs 6.43±0.66)%], but have no significantly(P>0.05). Group weight loss≥5% had better glucose control (92.68% vs 77.91%, P<0.05). Conclusions As BMI increased, insulin resistance and lipid disorders were more serious in newly-diagnosed type 2 diabetes. After 6 months of standardized metabolic management, newly-diagnosed type 2 diabetes with different baseline BMI and weight changes both achieved good glycemic control. In addition, patients losing weight equal to or more than 5% achieved higher attainment of HbA_1C targets.

Objective To analyze the clinical effect of community comprehensive intervention in the prevention and treatment of hypertension.Methods A total of 160 cases of patients were randomly divided into two groups,the control group (80 cases)were treated with conventional antihypertensive drug treatment;the observation group 80 cases of patients were treated with comprehensive community intervention on the basis of treatment of the control group.Two groups of patients before and after the intervention of blood pressure changes were observed and recorded,treatment effect and medication compliance were comparative analysized.Results The total effective rate of patients in the observation group was 86.25%,which was significantly higher than that in the control group (57.5%),the difference was statistically significant (χ2 =20.44,P <0.05).DBP,SBP after intervention of patients in the observation group were significantly lower than those before intervention and in the control group after the intervention,the differences were statistically significant (t =18.48,6.06,all P <0.05).Conclusion The effect of community comprehensive intervention on hypertension patients is significant,it can effectively control the patient's blood pressure level,improve the quality of life of patients,which is worth promoting.

OBJECTIVETo identify potential disease-causing mutation in the COL2A1 gene in a Chinese family affected with autosomal dominant spondyloepiphyseal dysplasia congenita (SEDC; OMIM 183900) and to analyze the phenotype-genotype correlation.

METHODSComplete physical, and radiographic examinations of 4 affected individuals from the family were conducted. Genomic DNA was isolated from peripheral blood leukocytes. Whole-exome sequencing was performed using a HiSeq2000 sequencer. All 54 exons and exon-intron boundaries of the COL2A1 gene were amplified by polymerase chain reaction (PCR) and bidirectionally sequenced.

RESULTSAll of the 4 individuals were found to carry a novel missense mutation of c.2224G>A (p.Gly687Ser) in the COL2A1 gene, while the same mutation was not found in the normal members of the family and 50 healthy controls. Protein prediction of missense mutation by Polyphen-2 and SIFT software indicated severe damage to the function.

CONCLUSIONThe mutation c.2224G>A (p.Gly687Ser) of the COL2A1 gene is responsible for this family. There are heterozygous of phenotype for the mutation.

Adolescent ; Adult ; Aged ; Asian Continental Ancestry Group ; genetics ; Base Sequence ; China ; Collagen Type II ; genetics ; Female ; Humans ; Male ; Middle Aged ; Molecular Sequence Data ; Mutation, Missense ; Osteochondrodysplasias ; congenital ; genetics ; Pedigree ; Point Mutation ; Young Adult

Objective To explore the association of C20orf54 gene rs3746804 position single nucleotide polymorphism and susceptibility to esophageal squamous cell carcinoma (ESCC).Methods Purification of genomic DNA from whole blood was used the Maxwell(R) 16 System.rs3746804 in C20ort54 was detected by direct sequencing in 434 ESCC patients from Changzhi (Shanxi province) and Linzhou (Henan province) and 554 healthy controls from Changzhi,Linzhou and including immigrators from Linzhou to Changzhi.Results For rs3746804,the genotypic frequencies of CT(37.5％ vs 51.0％,37.5％ vs 52.0％),CC (44.2％ vs 34.8％,44.2％ vs 33.0％) in Changzhi ESCC patients showed significant differences with healthy Changzhi controls and the healthy immigrator controls (all P ＜ 0.05),and the frequencies of TT(18.3％ vs 4.1％) and CC (44.2％ vs 54.6％) in Changzhi ESCC patients showed significant differences with Linzhou ESCC patients (all P ＜0.05).The genotypic frequencies of TT (4.1％ vs 15.0％),CT (41.2％ vs 52.0％) and CC(54.6％ vs 33.0％) showed significant differences between Linzhou ESCC patients and the healthy immigrator controls (all P ＜ 0.05),and the frequencies of TT (4.1％ vs 14.1％) and CC (54.6％ vs 34.8％) showed significant differences between Linzhou ESCC patients and Changzhi healthy controls (all P ＜ 0.01).Meanwhile,there were significant differences between ESCC patients (including Changzhi and Linzhou ESCC patients) and healthy controls (including the healthy Changzhi,Linzhou and immigrator controls) in genotypic frequencies of CT(39.2％ vs 48.7％) and CC (48.8％ vs 38.2％) (all P ＜ 0.01).CT and CT + TT genotype could decrease the risk of ESCC compared with the CC genotype (OR =0.630,95％ CI0.481-0.826 ; OR =0.654,95％ CI 0.507-0.844).Conclusion There is a closed relationship between SNP rs3746804 in C20orf54 and susceptibility to ESCC.

ObjectiveTo evaluate the value of tissue mitral annular displacement (TMAD) in the assessment of left ventricular long axis systolic function and the relationship of obese degree with left ventricular long axis systolic function in patients with abdominal obesity.MethodsThirty-eight abdominal obesity cases and thirty-four healthy cases were investigated using echocardiography.The images of apical four-chamber view and apical two-chamber view were obtained,systolic mitral annular displacement (MADs),mid-point of mitral annular displacement(MAD-midpt),mid-point of mitral annular normalized displacement(MAND-midpt) and mid-point of mitral annular biplanar normalized displacement(MABNDmidpt) were measured by the technique of TMAD.Their characteristics between patients with abdominal obesity and healthy group were compared,and the relationship of waist-hip ratio(WHR) and related indexes of MAD were analyzed.ResultsIn abdominal obesity group,the MADs at the four site were significantly decreased compared with control group (P＜0.001,respectively),the MAD-midpt and MAND-midpt of apical four-chamber view and apical two-chamber view were significantly decreased compared with control group (P＜0.001,respectively).The WHR related with MABND-midpt independently by the analysis of partial correlation(r=-0.697,P=0.000).ConclusionsThe left ventricular long axis systolic function were damaged in patients with abdominal obesity.The technique of TMAD could quantitatively assess the left ventricular long axis systolic function in patients with abdominal obesity.