IGF-1 mRNA expression of adult rat thyroid cell cultured in vitro

Objective: To investigate the law of age-related changes of insulin-like growth factor-1 (IGF-1) expression of rat thyroid cells cultured in vitro. Methods: Rat thyroid of different age (10, 45, 65, 100, 150 weeks) was isolated and thyrocytes cultured. Total RNA was extracted in different rat age group when thyroid cells had been cultured for two weeks. mRNA IGF-1 expression was measured with reverse-transcription polymerase chain reaction( RT-PCR) in each group and compared. Results: Quantity of total RNA in thyroid cells decreased with ageing when the rat thyroid cells had been cultured for 2 weeks. There is significant difference among groups (P<0.05). Expression of IGF-1 mRNA could be detected in thyroid cells of different age cultured in vitro. Quantity of IGF-1 mRNA expression by RT-PCR analysis increased from 10 to 45 weeks old, and then decreased with ageing. Conclusion: Rat thyroid cells from different age cultured in vitro can express IGF-1 mRNA. Quantity of total RNA in thyroid cells cultured in vitro decreased with aging. IGF-1 mRNA expression was correlated to age (r=0.401, P<0.05).

In the Basis of Hashimoto’s Thyroiditis, to Form Papillary Thyroid Carcinoma, Metastasized and Then to De-Differentiate into Poorly Differentiated Squamous Cell Carcinoma

Thyroid squamous cell carcinoma is very rare. At present, it is limited to case reports. Since the thyroid follicular epithelium is the non-squamous epithelium, how primary squamous cell carcinoma (SCC) of the thyroid occurs is still a controversial issue. Hashimoto’s thyroiditis (HT) is considered to be an independent risk factor for thyroid cancer, under the basis of HT, how tumor cells evolve and develop to papillary thyroid carcinoma (PTC), and particularly to de-differentiate into SCC is elusive. We report a 72-year-old female patient who developed multiple subtypes of PTC on a basis of HT, and finally to de-differentiate into SCC within the local foci of lymph node metastasis. We found that there was a variety of sub-types of PTC in this patient in the background of HT. SCC was found within local lymph node metastasis. Pathomorphology, immunohistochemistry, and molecular pathology have confirmed that the SCC was derived from PTC, and then developed into poorly differentiated SCC and/or anaplastic carcinoma. We also conducted a comprehensive literature review.

Stem cell biology in thyroid cancer: Insights for novel therapies

Currently, thyroid cancer is one of the most common endocrine cancer in the United States. A recent involvement of sub-population of stem cells, cancer stem cells, has been proposed in different histological types of thyroid cancer. Because of their ability of self-renewal and differentiation into various specialized cells in the body, these putative cells drive tumor genesis, metastatic activity and are responsible to provide chemo- and radioresistant nature to the cancer cells in the thyroid gland. Our Review was conducted from previously published literature to provide latest apprises to investigate the role of embryonic, somatic and cancer stem cells, and discusses the hypothesis of epithelial-mesenchymal transition. Different methods for their identification and isolation through stemness markers using various in vivo and in vitro methods such as flow cytometry, thyrosphere formation assay, aldehyde dehydrogenase activity and ATP-binding cassette sub-family G member 2 efflux-pump mediated Hoechst 33342 dye exclusion have been discussed. The review also outlines various setbacks that still remain to target these tumor initiating cells. Future perspectives of therapeutic strategies and their potential to treat advanced stages of thyroid cancer are also disclosed in this review.

Didactic surgical experience of thyroid metastasis from renal cell carcinoma: A case report

BACKGROUND The optimal therapeutic strategy in treating thyroid metastasis from renal cell carcinoma(RCC) has not been clearly established. Here we describe a case of didactic surgical experience of the disease which caused massive intraoperative bleeding.CASE SUMMARY A 59-year-old male patient presented with a thyroid left lobe soft mass detected by chest computed tomography scans prior to the surgical treatment of RCC of the left kidney. The thyroid mass was initially considered to be benign, then he underwent left radical nephrectomy. One year after the nephrectomy, stereotactic radiosurgery was performed for brain metastasis. During follow-up, the thyroid nodule gradually grew, and the patient manifested swallowing discomfort. Under a clinical diagnosis of thyroid follicular neoplasm, left hemithyroidectomy was performed. Although hemithyroidectomy is usually a safe and straightforward procedure, massive bleeding from markedly developed tumor vessels made the operation very difficult. The thyroid tumor was finally diagnosed as metastasis from clear cell RCC. CONCLUSION For proper timing of the surgery, a clinician should take into consideration the possibility of thyroid metastasis of RCC when a thyroid lesion is found in patients with RCC or in patients with a previous history of RCC. We recommend that thyroid metastasis of RCC should be resected as early as possible even if a patient has other metastatic sites.

Effect of parathyroid hormone on apoptosis of human medullary thyroid carcinoma cells

Objective The aim of the study was to investigate the effect of parathyroid hormone(PTH) on the apoptosis of human medullary thyroid carcinoma(MTC) cells.Methods In vitro cultured medullary thyroid carcinoma cell lines were treated with parathyroid hormone and parathyroid hormone receptor-monoclonal antibody,and the apoptosis of cells was detected by flow cytometry.Results The cell morphology changed significantly after treatment based on the observation using the inverted phase-contrast microscope.Various concentrations of parathyroid hormone and parathyroid hormone receptor-monoclonal antibody effectively induced apoptosis in a time-and concentrationdependent manner.When the concentration of parathyroid hormone was 2.0 μmol/L and that of parathyroid hormone receptor-monoclonal antibody was 1.0 μmol/L,the apoptotic rate was 13.24% and 20.78%,respectively,representing a statistically significant difference from that of the control cells(P < 0.05).Conclusion PTH plays a role in inducing apoptosis of human MTC cells.

Characteristics of clear cell renal cell carcinoma metastases to the thyroid gland: A systematic review

BACKGROUND Thyroid gland is an uncommon site for metastases from clear cell renal cell carcinoma(CCRCC)and literature is scarce.Due to the variable and often long lag time before development of metastases in patients with CCRCC,thyroid nodules may be misdiagnosed initially as benign.This systematic review aims at a better understanding of the nature of these metastases.METHODS A bibliographic search was performed using PubMed(1990-2019),key words being“renal cell carcinoma,thyroid,kidney cancer,clear cell.”147 cases were analyzed.The patient’s characteristics assessed were:age,sex,stage,size of metastases,lag time,diagnostic modality,initial symptoms,treatment and outcome in last documented follow up.Binary logistic regression,Spearman’s rho and ANOVA were used to identify differences between the existing variables.RESULTS The mean age(±SD)was 64±(10)years in males and 64(±11)in females.The mean lag time to diagnosis of thyroid metastases was 8.7(±6.3)years.Gender distribution of the patients was 46.3%male,52.4%female.There was a weak correlation between lag time and size of metastases,not statistically significant.Size of metastases was significantly higher in symptomatic patients(6.06±3.51 cm)compared to those with painless mass(4.6±0.29 cm)and asymptomatic ones(3.93±1.99 cm)(P=0.03).Fine Needle Aspiration was diagnostic in 29.4%of cases,47.1%were non diagnostic.Most patients(80.3%)underwent thyroid surgery.At 1 year follow up,55.6%of patients operated were alive versus 35.3%who did not have surgery,though this was not statistically significant(P=0.1).CONCLUSION A larger size of thyroid metastasis was more likely to present with symptomatology.A high index of suspicion is warranted when evaluating thyroid nodules in CCRCC patients.There was no significant difference in outcome between patients who underwent surgery and those who did not.With the wider use of immune check-point inhibitors and tyrosine kinase inhibitors in metastatic CCRCC,surgery may eventually be reserved only for palliative purposes.

Factors influencing the presence of circulating differentiated thyroid cancer cells in the thyroidectomy perioperative period

Objective The aim of the study was to detect circulating differentiated thyroid cancer(DTC) micrometastasis and to investigate the factors influencing their presence in the perioperative thyroidectomy period. Methods DTC micrometastases in the peripheral blood were detected with flow cytometry,and patient clinical and pathological factors were analyzed in 327 DTC patients. Results Circulating blood micrometastases were present in the peripheral circulation at a higher rate 1 week postoperatively than preoperatively and at 4 weeks postoperatively(P < 0.05). The preoperative presence of circulating micrometastasis was associated with the size of the tumor and the presence of lymph node metastasis(P < 0.05),but was not related to the degree of tumor differentiation(P > 0.05). At 4 weeks postoperatively,the presence of circulating micrometastasis was not associated with tumor size or lymph node stage(P > 0.05),but was associated with poorly differentiated tumors(P < 0.05). Conclusion The presence of circulating DTC micrometastases correlates to tumor size,lymph node stage,and operative manipulation. The differentiation degree of the tumors were associated with the persistent presence of micrometastasis in the circulating blood.

Thyroid follicular renal cell carcinoma excluding thyroid metastases:A case report

BACKGROUND Thyroid follicular renal cell carcinoma is a special type of renal cell carcinoma newly recognized in recent years.It has attracted attention because of its unique histology,immunophenotype,and clinical characteristics.It has a very low incidence,and the number of case reports available for review is limited.Moreover,a thyroid mass with type of tumour is rare.CASE SUMMARY We report a case of a renal mass with a bilateral thyroid mass that was accidentally discovered in a 60-year-old man during physical examination.B-mode ultrasound showed a hypoechoic mass in the middle and lower parenchyma of the right kidney,and computed tomography showed an iso-density shadow tumour in the right kidney.Contrast agents had a significant continuous enhancement effect on the tumour,and the enhancement was not uniform.After partial nephrectomy,pathological analysis was performed to rule out the possibility that the renal tumour was caused by thyroid tumour metastasis.Needle biopsy of the thyroid tumour confirmed that the renal cell carcinoma was not related to the thyroid tumour.The patient was alive at the last postoperative follow-up.CONCLUSION This is the third published case in which thyroid tumour biopsy was performed to confirm that thyroid follicular renal cell carcinoma is not thyroid related.

Frequency of IL-10-producing regulatory B cells associated with disease activity in thyroid-associated orbitopathy

AIM： To investigate the association between IL-10-producing regulatory B（B10） cells and the clinical features of thyroid-associated orbitopathy（TAO）. METHODS： A total of 30 patients with TAO were recruited at Zhongshan Ophthalmic Center from May 2015 to December 2015. Peripheral blood mononuclear cells（PBMCs） were separated from blood samples of 30 TAO patients and 16 healthy controls and stimulated with CD40 ligand and CpG for 48h. The frequency of IL-10＋ B cells was examined by flow cytometry and the correlation between the frequency of IL-10＋ B cells and clinical features of TAO was analyzed by SPSS. RESULTS： The frequency of IL-10＋ B cells among CD19＋ B cells in TAO patients was significantly lower than in healthy controls（TAO： 4.66%±1.88% vs healthy control： 6.82%±2.40%, P〈0.01）. The frequency of IL-10＋ B cells showed a positive correlation with disease activity of TAO measured by Clinical Activity Score（CAS）（r=0.50, P〈0.01）, and became higher in TAO patients with family history of Graves＇ disease（GD）（P=0.04）. CONCLUSION： The decrease of the frequency of IL-10＋ B cells in TAO patients indicates the deficiency of B10 cells in TAO, and the positive association with disease activity suggests its important role in TAO inflammation regulation.

Lenvatinib-induced multiorgan adverse events in Hurthle cell thyroid cancer: A case report

BACKGROUND The management of metastatic progressive radioiodine-resistant differentiated thyroid cancer remains challenging for clinicians.The availability of tyrosine kinase inhibitors(TKIs),sorafenib and lenvatinib,within the last decade has expanded treatment options;however,these lead to significant adverse effects,which may curtail their use.CASE SUMMARY We report the case of a 47-year-old female with Hurthle cell thyroid cancer who underwent total thyroidectomy followed by radioiodine ablation.During followup,she developed noniodine-avid renal and pulmonary metastases.With respect to her pre-existing diabetes,hypertension,and polycystic kidney disease,the tumor board decided against performing renal metastasectomy because of the risk of future renal decline requiring dialysis.Metastases were treated using sorafenib,which provided stability followed by progression within a year.We switched to lenvatinib,which led to disease regression.However,the patient experienced severe adverse effects,including cardiomyopathy,bicytopenia,renal impairment,and the rarely reported nephrotic syndrome.Renal metastasis is a rare manifestation of Hurthle cell thyroid cancer with only two reported cases in literature.We report the experience of our first case of renal metastasis and its treatment with TKIs.This case serves as a reminder of the adverse drug reactions associated with TKI use.CONCLUSION We advocate close monitoring of patients’hematological and renal profiles as well as their cardiac status using an echocardiogram.

Characterization of the Xenopus homolog of animmediate early gene associated with cell activation: sequence analysis and regulation of its expression by thyroid hormone during amphibian metamorphosis

The complex transformation of a tadpole to a frogduring amphibian development is under the control of thyroid hormone (T3). T3 is known to regulate gene transcription through its nuclear receptors. We have previouslyisolated many genes which are up-regulated by T3 in theintestine of Xenopus laevis tadpoles. We have now cloneda full- length cDNA for one such gene (IU12). Sequenceanalysis shows that the IU12 cDNA encodes a plasmamembrane protein with 12 transmembrane domains andhomologous to a mammalian gene associated with cell activation and organ development. Similarly, we have foundthat IU12 is activated during intestinal remodeling whenboth cell death and proliferation take place. Furthermore,IU12 is an early T3-response gene and its expression in theintestine during T3-induced metamorphosis mimics thatduring normal development. These results argue for a roleof IU12 in the signal transduction pathways leading to intestinal metamorphosis.

Concurrent pulmonary Mycobacterium avium complex (MAC) infection and active Hürthle cell thyroid carcinoma: is there a connection?

We present two cases of pulmonary MAC infection in women with Hürthle cell thyroid carcinoma. Both cases were asymptomatic octogenarian women with active Hürthle cell thyroid carcinoma and prolonged periods of hypothyroidism prior to diagnosis of pulmonary MAC. Mycobacterium avium complex has never been reported in association with any type of thyroid cancer, specifically Hürthle cell carcinoma. A review of the literature and possible associations between the two are discussed in this article.

Fine-needle aspiration cytology of an intrathyroidal nodule diagnosed as squamous cell carcinoma: A case report

BACKGROUND Both squamous cell carcinoma(SCC)and papillary thyroid carcinoma(PTC)are common malignant tumors in the neck.However,seldom has SCC of the thyroid been diagnosed.Further,cytological features of SCC and PTC have rarely been reported.The significance of fine-needle aspiration cytology(FNAC)in the diagnosis of neck masses has been established.Herein,we present an exceedingly rare case of an intrathyroidal SCC diagnosed using FNAC,along with its cytological features.CASE SUMMARY A 66-year-old man presented with a left-sided neck mass.Ultrasound examination showed an ill-defined nodule.The appearance was hypoechoic with a few hyperechoic spots.FNAC of the left thyroid nodule was performed.A cellular smear was obtained,and it showed a large number of neoplastic cells with rich cytoplasm and poor cell adhesion.Tumor cell nuclei showed coarse nuclear chromatin and a few enlarged prominent nucleoli.An increased nuclear/cytoplasm ratio was observed.Thus,malignancy was diagnosed without a confirmed tumor type.Percutaneous tumor biopsy was performed to make a definite diagnosis.The tumor cells showed typical squamous cell characteristics.CONCLUSION Head and neck SCC and PTC have different cytologies.Measures are needed to ensure accurate diagnosis using FNAC.

Thyroid Metastases from Clear Cell Renal Carcinoma: Presentation of an Unusual Case and Literature Review

Clear cell type renal cell carcinoma is a malignant tumor that can metastasize to many locations, but unusually spreads to thyroid. Therefore it is important to know the oncological background of the patient and to perform a complete immunohistochemical analysis of the thyroid lesion to obtain a correct diagnosis. Thyroidectomy can be considered in patients with no other metastasis or in those who present compressive symptoms as a palliative measure. We expose the case of a patient with clear cell type renal cell carcinoma, with a previously known bone metastasis of renal origin and symptomatic goiter containing a nodule that was found to be a metastasic lesion.

Clear Cells Carcinoma of Thyroid: Difficult Diagnosis and Rare Case

Clear cell carcinoma of the thyroid is rare. We report a case observed in a 17-year-old woman with a nodule in the left lobe of the thyroid. Cervical ultrasound showed a single nodule of the left lobe of the thyroid, measuring 28 × 14 × 21 mm with microcalcifications, classified TIRADS 4. Pathological and immunohistochemical examination of the excisional specimen concluded with clear cell carcinoma. The epidemiological and histological aspects were discussed.

Correlation between sodium-iodide symporter expression and circulating tumor cell positivity in differentiated thyroid carcinoma

Objective We investigated the correlation between the expression of the sodium-iodide symporter(NIS) and the detection of circulating tumor cells(CTCs) in differentiated thyroid carcinoma(DTC).Methods NIS expression in differentiated thyroid and the positive rate of CTCs in the peripheral blood were determined by immunohistochemistry S-P and flow cytometry from the records of 172 cases of differentiated thyroid carcinoma.Results Seventy-six cases(44.2%) expressed NIS in the differentiated thyroid and 63 cases(36.6%) were positive for CTCs in the peripheral blood. There was a significant difference between N0 and N1 in the expression of NIS(χ~2 = 6.015, P = 0.014) and the positive rate of CTCs(χ~2 = 14.035, P = 0.001). N0 and N1 also differed significantly in the expression of NIS(r =-0.383,-0.610, P = 0.002, < 0.001). The differences in the NIS expression, but not in the positive rate of CTCs, were significant among the different pathological subtypes(χ~2 = 7.897, P = 0.005; χ~2 = 1.455, P = 0.228, respectively). There was a significant negative correlation between the highly differentiated type and intermediate differentiation type both in the expression of NIS and positive rate of CTCs(r =-0.591,-0.443, P < 0.001, P = 0.002). Conclusion There was a significant negative correlation between the expression of tissue NIS and positive rate of CTCs in the peripheral blood in DTC. The malignancy level and lymph node metastasis in differentiated thyroid carcinoma were negatively correlated with NIS expression and positively correlated with the positive rate of CTC.

Scabrous patrinia root inhibits circulating tumor cells in differentiated thyroid carcinoma–a clinical observation

Objective To observe the clinical inhibition of circulating tumor cells(CTCs) in differentiated thyroid carcinoma(DTC) by the extract of scabrous patrinia root(Huikangling).Methods Eighty-seven DTC patients tested positive for CTCs were randomly divided into two groups; all patients were treated with oral levothyroxine sodium in accordance with the DTC endocrine inhibition treatment criteria. Patients(n = 45) in the treatment group were provided the standard endocrine therapy along with oral Huikangling(0.4 g/tablet, 0.4 g × 3/time, 3 times/day, 12 weeks). Patients(n = 42) in the control group were only provided the standard therapy. After 4 and 12 weeks, CTCs in the blood were detected by flow cytometry.Results After 4 weeks of oral Huikangling treatment, CTCs were detected in 18(40%) and 29(69%) patients in the treatment and control groups, respectively; the difference was statistically significant(χ2 = 8.49, P < 0.05). After 12 weeks, CTCs were detected in 7(15.6%) and 17(44.7%) patients in the treatment and control groups, respectively; the difference was statistically significant(χ2 = 5.68, P < 0.05). Follow-up evaluation revealed two patients with lung metastasis and one patient with bone metastasis in the control group; one patient showed lateral neck lymph node metastasis without local recurrence in the treatment group.Conclusion Huikangling treatment reduces the number of CTC-positive DTC cases; however, further studies are needed to elucidate the underlying mechanisms.

虎杖苷通过Hippo/YAP通路影响甲状腺癌8505C细胞的恶性生物学行为和顺铂敏感性

目的:探究虎杖苷通过Hippo/Yes相关蛋白(YAP)通路对人甲状腺癌8505C细胞的恶性生物学行为和顺铂(DDP)敏感性的影响。方法:体外培养8505C细胞,构建其DDP耐药细胞8505C/DDP,用CCK-8法检测0、25、50、75、100 nmol/L虎杖苷处理8505C和8505C/DDP细胞的增殖能力,以筛选虎杖苷的最佳作用浓度。将8505C细胞分为对照组、虎杖苷组、空载组、虎杖苷+YAP1过表达组;将8505C/DDP细胞分为对照组、DDP组、DDP+虎杖苷组、DDP+空载组、DDP+虎杖苷+YAP1过表达组。WB法检测各组8505C细胞中Hippo/YAP通路[YAP1、转录辅激活因子(TAZ)]和EMT(E-cadherin、N-cadherin)相关蛋白,8505C/DDP细胞中YAP1、TAZ、耐药相关蛋白[P-糖蛋白(P-gp)、多药耐药相关蛋白1(MRP1)]、凋亡相关蛋白(C-caspase-3、BAX、Bcl-2)的表达。Transwell小室和细胞划痕实验分别检测各组8505C、8505C/DDP细胞的侵袭、迁移能力。结果:虎杖苷可显著抑制8505C细胞的增殖活性(P<0.05)明显抑制8505C细胞中YAP1、TAZ蛋白、N-cadherin的表达(均P<0.05),提升E-caderin蛋白的表达(P<0.05),显著抑制8505C细胞的迁移和侵袭能力(均P<0.05),而8505C/DDP细胞对低浓度的虎杖苷具有耐药性(P<0.05);过表达YAP1则可逆转虎杖苷对8505C细胞的影响。50 nmol/L虎杖苷明显抑制DDP处理的8505C/DDP细胞中YAP1、TAZ、P-gp、MRP1、Bcl-2的蛋白的表达(均P<0.05),提升cleaved caspase-3、BAX蛋白的表达(均P<0.05)并诱导其细胞凋亡(P<0.05),过表达YAP1则可逆转虎杖苷对8505C/DDP细胞的影响。结论:虎杖苷抑制Hippo/YAP信号通路,从而抑制8505C细胞的恶性生物学行为和增强其对的DDP敏感性。

川楝素调节Notch信号通路对甲状腺癌细胞增殖、迁移和侵袭的影响

目的 研究川楝素通过调节Notch信号通路对甲状腺癌细胞增殖、迁移和侵袭的影响。方法 体外培养人甲状腺癌细胞8505C,CCK-8法检测不同剂量川楝素对8505C细胞存活率的影响;将8505C细胞分为对照组、川楝素-L、M、H组、川楝素+DAPT(Notch信号通路抑制剂)组;EDU法检测8505C细胞增殖;Transwell检测8505C细胞迁移与侵袭能力;RT-PCR检测不同8505C细胞组Notch1、HES1、HEY1、Ki67、MMP-2的mRNA水平;western blot检测不同8505C细胞组Notch1、HES1、HEY1、Ki67、MMP-2的蛋白水平。结果 与对照组相比,川楝素-L、M、H组8505C细胞EDU阳性细胞率、迁移与侵袭细胞数、Ki67、MMP-2的mRNA以及蛋白水平均显著性降低,Notch1、HES1、HEY1的mRNA以及蛋白水平显著性升高,且呈剂量依赖性(P<0.05);与川楝素-H组相比,川楝素+DAPT组EDU阳性细胞率、迁移与侵袭细胞数、Ki67、MMP-2的mRNA以及蛋白水平均显著性升高,Notch1、HES1、HEY1的mRNA以及蛋白水平显著性降低(P<0.05)。结论 川楝素可能通过激活Notch信号通路,抑制甲状腺癌细胞8505C增殖、迁移和侵袭。

Hsa_circ_0016600通过调控miR-149/PTK7轴促进甲状腺癌细胞迁移的机制

目的:探究环状RNA hsa_circ_0016600对甲状腺癌细胞迁移的影响及其作用机制。方法:收集温州医科大学附属第二医院颈部外科收治的15例甲状腺癌患者的癌组织及正常组织标本,采用RT-qPCR法检测hsa_circ_0016600、miR-149和PTK7在甲状腺癌组织及甲状腺细胞系中的表达情况。体外培养甲状腺癌细胞系,分别敲低hsa_circ_0016600和过表达miR-149,采用CCK-8、Transwell和划痕实验检测甲状腺细胞增殖、迁移和侵袭能力。建立小鼠异种移植皮下瘤模型,观察敲低hsa_circ_0016600的甲状腺癌细胞在体内的成瘤作用,并利用荧光原位杂交实验检测hsa_circ_0016600在裸鼠移植瘤模型中的表达水平。采用RNA荧光原位杂交实验检测hsa_circ_0016600和miR-149在甲状腺癌细胞中的定位,双荧光素酶报告基因实验检测hsa_circ_0016600与miR-149及miR-149与PTK7的靶向调控关系。结果:在人甲状腺癌组织和细胞系中,hsa_circ_0016600(P<0.05)和PTK7表达上调(P<0.01),miR-149表达下调(P<0.05)。敲低hsa_circ_0016600表达后,甲状腺癌细胞的增殖(P<0.01)、侵袭(P<0.01)和迁移能力(P<0.01)受到抑制。hsa_circ_0016600可通过靶向miR-149促进甲状腺癌细胞的增殖(P<0.01)、迁移(P<0.01)和血管形成,并上调PTK7的表达(P<0.01)。此外,PTK7是miR-149的一个靶基因。结论:Hsa_circ_0016600在甲状腺癌组织和细胞中高表达,并通过调控miR-149/PTK7轴促进甲状腺癌细胞的迁移。