Current Status and Progress of Diagnostic Techniques for Cancer of Unknown Primary / 肿瘤防治研究

Cancer of unknown primary (CUP) is a heterogeneous tumor type that has been diagnosed as a metastatic tumor by pathological examination, but the primary tumor cannot be identified through comprehensive clinical examination. The incidence of CUP accounts for approximately 1%–2% of all tumors. CUP progresses rapidly and has a short course. The treatment and prognosis of patients with CUP are closely linked to the primary site. In clinical settings, identifying the primary tumor remains challenging. Scholars have focused on improving the detection rate. Novel technologies, such as gene expression profiling, high-throughput sequencing, epigenetics, and liquid biopsy, have been successively applied to identify the primary tumor of CUP accurately, sensitively and specifically. With the guidance of molecular diagnosis, targeted therapy, immunotherapy, and combination therapy will usher in the era of precision treatment for CUP, which may become a typical example for individualized therapy.

Application of gene detection in individualized treatment of lipid-lowering drugs / 中国药房

The main clinical manifestation of dyslipidemia is hyperlipidemia， which is an important risk factor leading to the occurrence of cardiovascular and cerebrovascular diseases such as atherosclerosis， coronary heart disease and stroke. In clinical practice， lipid-lowering drugs are mainly used for treatment， but there are issues such as individual differences and genetic effects. Therefore， it is necessary to perform gene detection on patients， so as to guide individualized application of lipid-lowering drugs. This review mainly previews the definition of gene detection and the individualized treatment of lipid-lowering drugs， and introduces the application of gene detection in the individualized treatment of lipid-lowering drugs （statins， fibrates， nicotinic acid and ezetimibe）. Among them， the gene polymorphisms of APOE， SLCO1B1 and CYP450 family play a key role in the efficacy and safety of statins； the gene polymorphisms of APOA/B/C family have a significant impact on the efficacy of fenofibrate； the gene polymorphisms of HCAR2 and DGAT2 have an important impact on the efficacy of niacin； the gene polymorphisms of NPC1L1 have a significant impact on the efficacy of ezetimibe. It is suggested to conduct genotype detection for patients with dyslipidemia to select appropriate treatment strategies， so as to provide individualized medication guidance.

Advances in diagnosis and treatment of familial hypercholesterolemia / 南方医科大学学报

Familial hypercholesterolemia (FH) is an autosomal dominant inherited disease caused by abnormal lipoprotein metabolism. Patients with FH have a significantly increased risk of coronary artery disease (CAD) due to long-term exposure to high levels of low-density lipoprotein (LDL). The diagnosis of FH relies heavily on gene detection, and examination of LDL receptor (LDLR) function is of great significance in its treatment. This review summarizes the current advances in the screening, diagnosis, and treatment of FH and functional analysis of LDLR gene mutations.

Familial bilateral pheochromocytoma: a case report / 中华泌尿外科杂志

Familial pheochromocytoma belongs to autosomal dominant inheritance, and has complex and variable clinical manifestations. A child with bilateral PHEO was admitted to our hospital. His grandmother, father and brother were all diagnosed with PHEO, and his aunt was diagnosed with paraganglioma. The child underwent laparoscopic left partial adrenalectomy and open surgery for the contralateral tumor, and was in good postoperative condition. The blood pressure returned to normal and there was no local recurrence and metastasis during the follow-up of 8 months after the second operation.

Clinical significance of folic acid metabolic gene detection in methotrexate treatment of leukemia / 中国药房

OBJECTIVE To expl ore the clinical significance of folic acid metabolic gene detection in methotrexate （MTX） treatment of acute myeloid leukemia （AML）. METHODS Therapeutic drug monitoring （TDM）pharmacists participated in the treatment process of an AML patient who had neurotoxic side effects such as dizziness ，headache，and vomiting after intrathecal injection of MTX. According to the results of the test of the folic acid metabolic gene MTHFR C677T（rs1801133）（mutant homozygous）and the results of MTX blood concentration monitoring （＜0.05 μmol/L），combined with clinical manifestations ，it was recommended to stop MTX ，give intravenous drip of calcium folinate for rescue ，and consider using azacytidine for follow-up treatment. RESULTS The doctor took the advice of TDM pharmacist ，and the above symptoms were significantly relieved after the patient rescued for 2 times and successfully discharged from the hospital. CONCLUSIONS For AML patients who meet the indications and receive intrathecal injection of MTX ，drug metabolism genetics testing and MTX drug concentration monitoring can be performed before medication ，which helps doctors and pharmacists evaluate the feasibility of drug treatment options and reduce medical risks.

Spectrum analysis of gene mutations in retinitis pigmentosa and cone-rod dystrophy / 国际眼科杂志(Guoji Yanke Zazhi)

@#AIM: To analyze the gene mutation spectrum of autosomal recessive retinitis pigmentosa(ARRP)pedigrees and cone-rod dystrophy(CORD)pedigrees in Ningxia region of China. <p>METHODS:Totally 35 ARRP pedigrees and 18 CORD pedigrees were included in Ningxia Eye Hospital from September 2016 to February 2020. Peripheral venous blood samples of the proband were collected for targeted capture enrichment and high-throughput sequencing using a genetic retinal disease capture chip that contain 232 pathogenic genes. Online analysis software was used to predict the pathogenicity of suspicious gene variation, and Sanger sequencing was used to analyze the co-segregation of the family members. <p>RESULTS: Totally 16 pathogenic genes were confirmed in 35 ARRP pedigrees, the mutations rate of RP1 gene was the highest, accounting for 14%(5/35), following were ABCA4, CRB1 and EYS gene, accounted for 11%(4/35); 18 CORD pedigrees carried 10 pathogenic genes. The mutation rate of ABCA4 gene was the highest, accounting for 28%(5/18), followed by ALMS1, PROM1, RPE65, USH2A gene, accounting for 11%(2/18). There were 5 co-exist disease-causing genes in ARRP and CORD pedigrees, which were ABCA4, CLN3, CRB1, PROM1, NRL, accounting for 42%(22/53).<p>CONCLUSION: There are similarities and crossover in the phenotype of ARRP and CORD. The pathogenic genes were overlaped. The most common overlaping gene between the two diseases is ABCA4.

Research progress of ultrasound based in diagnosis follicular thyroid carcinoma / 国际生物医学工程杂志

Follicular thyroid carcinoma(FTC) is a differentiated thyroid carcinoma originated from thyroid follicular cells. The sensitivity and specificity of ultrasound classification and scoring systems in diagnosis of follicular carcinoma are insufficient. Ultrasound guided fine needle aspiration(US-FNA) can screen but cannot diagnose FTC. Core needle biology(CNB) can reduce repeated FNA and unnecessary operations, and improve the diagnostic accuracy of FN patients, but CNB still has many controversies. Ultrasound guided FNA combined with gene detection (such as RAS) can significantly improve the diagnostic accuracy of follicular neoplasm. In recent years, artificial intelligence assisted diagnosis has shown high specificity in distinguishing FTC from follicular thyroid adenoma (FTA), which is conducive to the standardized treatment of thyroid follicular neoplasm. In this paper, the research progress of ultrasound based in diagnosis of FTC was reviewed.

New progress of gene detection in diabetic retinopathy / 国际眼科杂志(Guoji Yanke Zazhi)

@#At present, gene detection technology has become increasingly mature and integrated with multi-disciplinary, which provides help for clinicians to diagnose, treat andprognosis of the disease. In recent years, gene detection technology in diabetic retinopathy(DR)has made some progress, mainly applied to the risk factors of diabetic retinopathy and follow-up personalized treatment plan. Therefore, we summarize and analyze the gene loci related to diabetic retinopathy that can be detected by gene detection technology.

Establishment of the gene detection method of Schistosoma mansoni based on the recombinase-aided isothermal amplification assay / 中国血吸虫病防治杂志

Objective To establish a recombinase-aided isothermal amplification (RAA) assay for nucleic acid detection of Schistosoma mansoni. Methods The 121 bp highly-repeated sequence of S. mansoni was selected as the target gene fragment to be detected. The primers and fluorescent probes were designed using the Amplfix software, and a fluorescent RAA assay was established and optimized. The fluorescent RAA assay was performed to detect gradient diluent recombinant plasmids containing target gene fragment and different concentrations of S. mansoni genomic DNA to determine the sensitivity, and this assay was applied to detect the genomic DNA of S. japonicum, S. haematobium, Ancylostoma duodenale and Clonorchis sinensis to evaluate the specificity. Results A fluorescent RAA assay was successfully established, which was effective to amplify the specific gene fragments of S. mansoni within 20 min at 39 ℃. The minimum detectable limit of the fluorescent RAA assay was 10 copies/μL using recombinant plasmids as templates and 0.1 fg/μL using S. mansoni genomic DNA samples as templates. The fluorescent RAA assays were all negative for detecting the genomic DNA from S. japonicum, S. haematobium, A. duodenale and C. sinensis. Conclusions A novel fluorescent RAA assay is successfully established, which is simple, rapid, sensitive and specific to detect genomic DNA of S. mansoni.

Congenital diarrhea and enteropathies in children / 中国实用儿科杂志

Congenital diarrhea and enteropathies(CODEs)are typically monogenic disorders. Patients always present with persistent and severe chronic diarrhea. The diagnosis of CODEs is oftern delayed and there is a high mortality. Application of endoscopy,histologic evaluation and next generation sequencing might facilitate the diagnosis,and precision medicine to patients with CODEs.

Application of Medication Therapy Management Combined with Medicine Gene Detection in Individualized Pharmaceutical Care of An Elderly Patient with Warfarin-induced Acute Upper Gastrointestinal Hemorrhage / 中国药房

OBJECTIVE： To investigate how pharmacists provide through individualized pharmaceutical care for patients medication therapy management（MTM） combined with medicine gene detection， and to promote rational drug use in clinic.METHODS： A case of elderly comorbidity with acute upper gastrointestinal hemorrhage caused by Warfarin sodium tablets was taken as an example. The patient had a history of type 2 diabetes mellitus and hypertension. Coronary artery bypass grafting was performed two months before admission， and urinary tract infection occurred half a month ago. Medication therapy course was analyzed retrospectively before and after hospitalization； based on gene typing detection of CYP2C9*3 and VKORC1-1639， the individualized dose of Warfarin sodium tablets was evaluated. MTM was perfomed for acute upper gastrointestinal hemorrhage and all medication of patient to formulate individualized medication scheme. RESULTS： The genotyping of warfarin CYP2C9*3 and VKORC1-1639 indicated that the patients were of super slow metabolic type. The recommended dosage of warfarin should be 0.86-1.86 mg/d. Based on MTM analysis of acute upper gastrointestinal hemorrhage， the main causes of acute upper gastrointestinal hemorrhage were Warfarin sodium tablets 3.0 mg/d， poor drug compliance， disease status and co-morbidity and multi-drug combination. Clinical gastrointestinal hemorrhage of the patients were improved after drug withdrawal， anticoagulant drugs was changed into Rivaroxaban tablet，10 mg/d. Through MTM for all drug use in the patient， results of medication reorganization showed that Diltiazem hydrochloride tablet， Amoxicillin/clavulanate potassium dispersible tablet， Compound vitamin tablet were stopped； hypoglycemic drug Glimepiride tablet was changed into Gliquidone tablet； Metoprolol tartrate tablet was changed into Bisoprolol tablet after coronary artery bypass graft； proton pump inhibitor Esomeprazole enteric-coated tablet was changed into Pantoprazole sodium enteric-coated capsule. CONCLUSIONS： The pharmaceutical care mode of MTM combined with medicine gene detection can guide rational drug use in clinic， realize individualized pharmaceutical care， improve patient compliance and prevent problems related to adverse drug reactions.

Objective indexes for the diagnosis of premature ejaculation: An update / 中华男科学杂志

Premature ejaculation is a common male sexual dysfunction disorder, and there are many controversies over its definition. With deeper insights into the etiology and pathogenesis of premature ejaculation, more and more auxiliary examinations are used in its diagnosis, prognostic evaluation and treatment, such as transrectal ultrasonography of seminal vesicles, determination of serum 5-hydroxytryptamine (5-HT) concentration, serum hormone levels, penile sensitivity detection, brain function tests, and genetic sequencing. This review outlines the latest advances in the auxiliary examination of premature ejaculation and provides clinicians with some diagnostic indexes or methods of premature ejaculation for reference.

Gene mutation spectrum analysis of retinitis pigmentosa patients in Ningxia Region of China / 中华实验眼科杂志

Objective@#To analysis the gene mutation spectrum of retinitis pigmentosa (RP) patients in Ningxia Region of China.@*Methods@#Fifty-five pedigrees and 74 sporadic RP patients were included in Ningxia Eye Hospital from January 2015 to December 2016.Two hundred unrelated healthy adults were enrolled as normal controls during the same period.The clinical features of patients and their family members were evaluated by ophthalmic examinations, including visual acuity, best corrected visual acuity, fundus examination, optical coherence tomography, fundus fluorescein angiography, and visual field and electroretinogram.The next generation sequencing, PCR and direct sequencing were used to confirm the pathogenic mutation.This study was approved by Ethic Committee of the Ningxia Eye Hospital (NO.20150107), and informed consent was obtained from each subject.@*Results@#The mutations were detected in 37 RP pedigrees, 8 pedigrees showed autosomal dominant inheritance and 6 pathogenic genes were confirmed, all the autosomal dominant RP (ADRP) patients carried a single heterozygous mutation.Twenty-five pedigrees were autosomal recessive RP (ARRP) and 12 pathogenic genes were confirmed.Among ARRP patients, the mutations rate of USH2A gene was the highest, accounting for 28% (7/25), EYS gene and MYO7A gene accounted for 12% (3/25). Four X-linked RP (XLRP) pedigrees carried the homozygous mutations on RPGR gene.Twenty-five disease-causing genes were detected in 49 sporadic RP patients.The mutation rate of USH2A gene was the highest, accounting for 26.5% (13/49), followed by RP1 gene, accounting for 8.1% (4/49).@*Conclusions@#Recessive inheritance is the most common cause of RP.USH2A gene is the main pathogenic gene of RP in Ningxia region of China.

Preliminary experience in guiding individualized targeted therapy of advanced metastatic renal cell carcinoma with gene detection technology / 中华泌尿外科杂志

Objective To explore the efficacy and tolerance of adverse reactions of gene detection technique in guiding individualized targeted therapy for advanced metastatic renal cell carcinoma.Methods Retrospective analysis was performed on the clinical data of 62 patients with advanced metastatic renal cell carcinoma before and after receiving targeted drug treatment in our department from October 2015 to October 2017.Among the 62 patients,there were 36 males and 26 females,with an average age of (54 ± 13) years old.16 patients were treated with sunitinib,20 patients were treated with sorafenib and 26 patients were treated with pazopanib.A total of 28 patients (individualized group) were selected to receive targeted drug according to the results of gene detection,and 34 patients were treated with targeted drug empirically (empirical group).In individualized group,there were 17 males and 11 females with the average age of (51.3 ± 15.6) years old.20 patients accepted the operation.The distant metastasis included bone metastasis in 21 cases,lung metastasis in 7 cases,liver metastasis in 16 cases,epidermal metastasis in 4 cases and lymphatic metastasis in 14 cases.According to risk of MSKCC,the case number of low risk,moderate risk and high risk were 15,7,6,respectively.7 patients were treated with sunitinib,8 patients were treated with sorafenib and 13 patients were treated with pazopanib.In empirical group,there were 19 males and 15 females with the average age of (56.3 ± 10.1) years old.22 patients accepted the operation.The distant metastasis included bone metastasis in 20 cases,lung metastasis in 5 cases,liver metastasis in 13 cases,epidermal metastasis in 3 cases and lymphatic metastasis in 15 cases.According to risk of MSKCC,the case number of low risk,moderate risk and high risk were 20,g,6,respectively.9 patients were treated with sunitinib,12 patients were treated with sorafenib and 13 patients were treated with pazopanib.The baseline characteristics of the two groups of patients,including gender,age,whether operation was performed,site of metastasis,and risk of MSKCC,didn't show significant difference.Patients in both groups received the standard treatment regimen and the follow-up duration was 4-26 months to observe the efficacy,progression-free survival and tolerance to adverse reactions of the targeted therapy.Results After 12 months of treatment,15 patients in the individualized group was recorded objective remission.7 patients in the empirical group was recorded objective remission,as well.The tumor control efficacy of the individualized group was significantly better than that of the empirical group (46.4％ vs.20.6％,P =0.03).Meanwhile,the median progression-free survival time (15.2 months,3.7-24.2 months) in the individualized group was significantly longer than that in the empirical group (12.1 months,2.8-22.1 months) (P =0.009).Compared with the empirical group,the higher incidence of targeted treatment-related adverse reactions occurred in the individualized group,including thrombocytopenia (46.4％ vs.17.6％ P =0.014),leukopenia (46.4％ vs.17.6％ P =0.005),hypertension (71.4％ vs.44.1％,P =0.031) and hypothyroidism(60.7％ vs.29.4％,P=0.013).Conclusions Compared with the patients with empirical drugs,the application of gene detection technique to select individualized targeted drugs for the treatment of advanced metastatic renal cancer is obvious curatively effective,and to a certain extent extends the progression-free survival time of patients.

Gene mutation spectrum analysis of retinitis pigmentosa patients in Ningxia Region of China / 中华实验眼科杂志

Objective To analysis the gene mutation spectrum of retinitis pigmentosa ( RP ) patients in Ningxia Region of China. Methods Fifty-five pedigrees and 74 sporadic RP patients were included in Ningxia Eye Hospital from January 2015 to December 2016. Two hundred unrelated healthy adults were enrolled as normal controls during the same period. The clinical features of patients and their family members were evaluated by ophthalmic examinations,including visual acuity,best corrected visual acuity,fundus examination,optical coherence tomography, fundus fluorescein angiography,and visual field and electroretinogram. The next generation sequencing,PCR and direct sequencing were used to confirm the pathogenic mutation. This study was approved by Ethic Committee of the Ningxia Eye Hospital (NO. 20150107),and informed consent was obtained from each subject. Results The mutations were detected in 37 RP pedigrees, 8 pedigrees showed autosomal dominant inheritance and 6 pathogenic genes were confirmed,all the autosomal dominant RP ( ADRP ) patients carried a single heterozygous mutation. Twenty-five pedigrees were autosomal recessive RP ( ARRP) and 12 pathogenic genes were confirmed. Among ARRP patients,the mutations rate of USH2A gene was the highest,accounting for 28％ (7/25),EYS gene and MYO7A gene accounted for 12％ (3/25). Four X-linked RP (XLRP) pedigrees carried the homozygous mutations on RPGR gene. Twenty-five disease-causing genes were detected in 49 sporadic RP patients. The mutation rate of USH2A gene was the highest, accounting for 26. 5％ ( 13/49 ) , followed by RP1 gene, accounting for 8. 1％ ( 4/49 ) . Conclusions Recessive inheritance is the most common cause of RP. USH2A gene is the main pathogenic gene of RP in Ningxia region of China.

Fetal aortic arch and its branches anomalies: prenatal ultrasound, vascular cast and gene detection / 中华超声影像学杂志

Objective@#To explore the application values of prenatal ultrasound, vascular cast in the diagnosis of fetal aortic arch and its branches anomalies and to analyze the genetic characteristics by gene detection.@*Methods@#Twenty-two cases of the vascular cast specimens of the fetal aortic arch and its branches anomalies were analyzed and studied by comparing with their prenatal ultrasonography. Then the characteristics of each type of fetal aortic arch and its branches anomalies, the missed diagnosis and misdiagnosis were summarized and the results of their gene detection were also analyzed.@*Results@#The 22 cases of fetal aortic arch and its branches anomalies were as follows: 2 cases of double aortic arch showed the ascending aorta was divided into two branches after converging as the descending aorta. Three cases were left aortic arch with aberrant right subclavian artery. Twelve cases were right aortic arch: 8 cases were right aortic arch with mirror-image branching, 3 cases were right aortic arch with aberrant left subclavian artery, 1 case was right aortic arch with isolated left subclavian artery. Of the 8 right aortic arch with mirror-image branching, 3 cases of left arterial duct showed the vertical walking between the fusion site of the left innominate artery and the pulmonary artery. Right aortic arch with aberrant left subclavian artery with arterial duct showed "U" shaped vascular ring. Five cases were other types, including 2 cases of the coarctation of aortic arch, 1 case of interrupted aortic arch, 1 case of pulmonary artery sling, and 1 case of abnormal origin of right pulmonary artery. The ultrasonic missed diagnosis were the 6 deformities: 3 cases of arterial duct and 3 cases of aberrant subclavian artery. The ultrasonic misdiagnosis were the 5 deformities: 2 cases of arterial duct location, 1 case of aberrant subclavian artery, 1 case of isolated left subclavian artery, and 1 case of the coarctation of aortic arch. Genetic test results: In the 18 cases of the genetic detection, 2 cases were positive, 1 case was 22q11.2 microdeletion syndrome and 1 case was carrying KMT2D gene variant.@*Conclusions@#There are various kinds of fetal aortic arch and its branches anomalies, which are often associated with intracardiac malformations and venous branches variation. And prenatal ultrasound is of great value in diagnosing them.Vascular cast can visually display their characteristic changes, which is helpful to improve the differential diagnosis of the different aortic arch and its branches anomalies. The detailed genetic detection can improve the further understanding of its etiology.

Clinical application of thyroid cancer gene detection in early diagnosis of thyroid nodules / 实用医学杂志

Objective To evaluate the clinical value of thyroid cancer gene detection and its joint diagnos-tic model in early diagnosis of thyroid nodule. Methods Retrospective study was used to analyze 61 cases of thy-roid nodules. These cases were divided into benign nodules and malignant nodules according to the pathology out-comes. We evaluated the AUC,sensitivity and specificity of preoperative fine needle aspiration biopsy(FNAB), thyroid cancer gene detection and color ultrasonography feature in the early diagnosis of thyroid nodule through lo-gistic regression analysis and ROC working curve. Results Among the 61 patients with thyroid nodules,there were 31 cases of benign thyroid nodules and 30 cases of malignant nodules.Diagnostic indexes significantly related with thyroid nodules and their AUC were listed as following:cancer gene detection 0.915(95% CI:0.814-0.971), FNAB 0.813(95% CI:0.691-0.902),low echo 0.657(95% CI:0.523-0.775),size of nodules 0.623(95% CI:0.488-0.745),joint diagnostic model respectively 0.957(95%CI:0.871-0.993). The value of joint diagnosis was the highest,whose sensitivity was 93.1% and the specificity was 90.3%.Conclusion Preoperative cancer gene de-tection joint FNAB and color ultra-sonography will improve the detection rate of thyroid cancer and reduce unneces-sary operation.

The clinical characteristics and gene diagnosis of Rubinstein-Taybi syndrome / 临床儿科杂志

Objective To explore the clinical and genetic features of Rubinstein-Taybi syndrome (RSTS). Methods The clinical data of 2 children with RSTS were reviewed and analyzed. Results Two male children (3 years old and 4 months old) were admitted to hospital because of growth retardation. Both of them were characterized by short stature, language and motor retardation, excessive hairiness and cryptorchidism. Case 1 had slightly broad thumbs and toes, and case 2 had distinctive facial features of high arched palate, broad nasal bridge, ptosis, and obviously broad thumbs and toes. Cardiac dysplasia was found in both of them by echocardiography. The c.152T>G (L51X) heterozygous mutation was found in case 1 by high throughput sequencing and genomic chip technology, and this mutation has not been reported. Deletion of 2.5 Mb in chromosome 16p13.3 region was found in case 2. Conclusions The main clinical manifestations of RSTS are excess hair, deformity of thumbs and toes, deformity of the heart development, and growth retardation. Molecular detection can help the clinical diagnosis.

Kabuki syndrome:two case report / 临床儿科杂志

Objective To summarize the clinical features and genetic diagnosis of Kabuki syndrome. Methods The clinical data of Kabuki syndrome in 2 children were retrospectively analyzed. Results Both of them were male and over 1 year old. They had special facial features and febrile convulsion. Gene detection indicated that both of them had mutation in KMT2D (or MLL2) gene, but the clinical phenotypes were different. Conclusion Children with clinically suspected Kabuki syndrome can be confirmed by gene detection.

Application of droplet digital PCR in the precision treatment of breast cancer / 中国肿瘤临床

In the context of precision medicine, although individual treatment of breast cancer under the guidance of molecular classi-fication has become the norm, a precision treatment program with increased efficiency and quality is still required. Compared with the traditional real-time fluorescent quantitative polymerase chain reaction (PCR), the droplet digital PCR (ddPCR) has obvious advantages in the detection of rare mutations and copy number variations, as well as the integration with the second-generation-sequencing tech-nology. This paper reviews the application of a ddPCR platform in different breast cancer subtypes and explores new horizons of breast cancer research through the ddPCR technology.