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1.
Heliyon ; 10(3): e24802, 2024 Feb 15.
Artículo en Inglés | MEDLINE | ID: mdl-38318059

RESUMEN

Background: Our objective was to assess the viability and oncological security of a gasless, transaxillary single-incision endoscopic procedure for performing total thyroidectomy and bilateral central neck dissection (TT + BCND). This study focused on patients diagnosed with bilateral papillary thyroid microcarcinoma (PTMC). Method: Between April 2020 and November 2021, 22 patients with bilateral PTMC underwent single-incision, gasless, transaxillary endoscopic TT + BCND. The patients' clinicopathologic characteristics, surgical completeness and complications were analyzed. Result: Single-incision, gasless, transaxillary endoscopic TT + BCND was successful performed in all patients. The median (IQR) total surgical time was 143 (85-160) min. Only two patients experienced transient unilateral RLN palsy or transient hypocalcemia. All these complications resolved within 1 month after surgery. The median duration of hospital stay after surgery was 4 (3-4.5) days. The median hospitalization expense for these patients was 3848 (3781-4145) USD. The median number of lymph node yielded was 10.5 (8-15). The cosmetic outcomes were well-received by all individuals. Conclusion: In certain cases, gasless, transaxillary endoscopic TT + BCND procedure performed through a single incision proved to be a secure alternative for managing bilateral PTMC.

2.
Surg Endosc ; 37(12): 9255-9262, 2023 12.
Artículo en Inglés | MEDLINE | ID: mdl-37875693

RESUMEN

BACKGROUND: In a previous study, we proposed a novel anatomy-based five-settlement method for transaxillary endoscopic thyroidectomy (fs-TAT) for patients with papillary thyroid carcinoma. The safety of this new method has been reported in a retrospective study of a single cohort. The safety and short-term oncological outcome of this method was confirmed by comparing it with conventional open surgery (COT) in patients with papillary thyroid microcarcinoma. METHODS: The medical records of patients who underwent fs-TAT or COT by a single surgeon from February 2019 to December 2021 were reviewed retrospectively. All patients were diagnosed with papillary thyroid microcarcinoma and underwent lobectomy and ipsilateral central compartment neck dissection. Propensity score matching was used to compare the technical safety and short-term oncologic outcomes of fs-TAT and COT for the purpose of reducing potential selection bias. Reporting was consistent with the STROCSS 2021 guidelines. RESULT: After propensity score matching, 460 (fs-TAT: 230; COT: 230) patients remained in the study population. There were no significant differences in sex, age, tumor size, Hashimoto's thyroiditis, or tumor multifocality between the groups. The operative time was longer [104.5 (90.3, 120.0) vs. 62.0 (52.0, 76.0), P < 0.001] and the total postoperative drainage volume [135(90, 210) vs. 75 (55, 115), P < 0.001] was greater in the fs-TAT group than in the COT group. However, intraoperative bleeding [3.0 (2.0, 5.0) vs. 5.0 (5.0, 7.5), P < 0.001] was greater, and the median number of lymph nodes yielded [5.0 (2.3, 8.0) vs. 7.0 (5.0, 11.0), P < 0.001] was greater in the COT group than in the fs-TAT group. The groups exhibited no significant difference in the rate of complications (fs-TAT: 2.2% vs. COT: 2.6%, P = 0.856), rate of positive lymph nodes (fs-TAT: 32.2% vs. COT: 36.5%, P = 0.377), length of postoperative hospital stay (3 days vs. 3 days, P = 0.305) or total medical costs (26,936 vs. 26,549, P = 0.144). CONCLUSION: Compared to conventional open surgery, fs-TAT offered excellent safety and acceptable short-term oncological outcomes in a selected cohort of patients with papillary thyroid microcarcinoma.


Asunto(s)
Neoplasias de la Tiroides , Tiroidectomía , Humanos , Tiroidectomía/métodos , Estudios Retrospectivos , Puntaje de Propensión , Neoplasias de la Tiroides/cirugía , Neoplasias de la Tiroides/patología , Endoscopía/métodos
3.
Front Endocrinol (Lausanne) ; 14: 1147313, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37143719

RESUMEN

Background: Endoscopic thyroidectomy (ET) via gasless unilateral axillary (GUA) approach has been widely implemented worldwide. Based on our concept of mesothyroid excision in open surgery, we proposed a novel anatomy-based five-settlement method in ET via the GUA approach. This preliminary report aimed to explore the efficacy and safety of this method in patients with papillary thyroid carcinoma (PTC). Methods: PTC patients who underwent endoscopic ET and unilateral central compartment neck dissection (CCND) via GUA approach with the five-settlement method at the Department of General Surgery, Nanfang Hospital, Southern Medical University from March 2020 to December 2021 were retrospectively collected. The data included general clinicopathological characteristics, surgical information (including duration, complication, and clinicopathological features), and hospital stay information, and other medical records were documented. Results: In total, 521 patients underwent lobectomy and CCND under the GUA approach with the five-settlement method. The mean number of lymph nodes yielded (LNY) and positive lymph nodes (PLN) was 5.7 ± 4.3 (range, 1-30) and 1.0 ± 1.8 (range, 0-12), respectively. The incidence of transient recurrent laryngeal nerve injury was 1.1%. Chyle leakage and Horner's syndrome respectively occurred in one patient (0.2%). Five (0.9%) patients developed a hematoma. No severe complications or conversion to open surgery have occurred. Conclusion: The five-settlement method could be implemented safely and efficiently in ET+CCND via the GUA approach in selected PTC patients.


Asunto(s)
Carcinoma Papilar , Neoplasias de la Tiroides , Humanos , Tiroidectomía/efectos adversos , Tiroidectomía/métodos , Neoplasias de la Tiroides/cirugía , Neoplasias de la Tiroides/patología , Disección del Cuello/efectos adversos , Disección del Cuello/métodos , Estudios Retrospectivos , Carcinoma Papilar/cirugía , Carcinoma Papilar/patología , Cáncer Papilar Tiroideo/cirugía , Cáncer Papilar Tiroideo/patología
4.
Oral Oncol ; 123: 105567, 2021 12.
Artículo en Inglés | MEDLINE | ID: mdl-34710736

RESUMEN

BACKGROUND: To evaluate the relationship between lymph node yield (LNY) from the initial central neck dissection (CND) and the risk of recurrence in patients undergoing reoperative CND for papillary thyroid cancer (PTC). METHOD: We reviewed clinical data from all patients with pathologically proven PTC who underwent central neck and/or lateral neck dissection reoperations at Nanfang Hospital between 2012 and 2020. Patient demographics, tumor characteristics, clinical data and follow-up information were obtained. In the initial CND, the total number of lymph nodes removed (LNY), total positive nodes removed, and the percentage of positive lymph nodes to the number of lymph nodes removed (PLN%) were determined. RESULTS: A total of 162 patients were included in the study, with a median follow-up of 44 months. 62 had central neck disease recurrence. The optimal LNY and PLN% cut-off values for recurrence were 11 and 65%, respectively. Group 2 (LNY ≥ 11, PLN% < 65%) showed a significantly higher RFS rate than group 1 (LNY < 11 and PLN% < 65%; P < 0.001), group 3 (LNY < 11, PLN% ≥ 65%; P < 0.001), and group 4 (LNY ≥ 11, PLN% ≥ 65%; P = 0.038). Furthermore, group 4 had a higher RFS rate than group 1 (P = 0.008) and group 3 (P = 0.001). Multivariate analysis revealed that LNY < 11 in the central neck was an independent risk factor for recurrence/persistence in the initial surgery (P < 0.001). CONCLUSION: Higher LNY in central and neck dissections is associated with lower papillary thyroid cancer recurrence rates, which was confirmed by a reoperative CND procedure. To minimize the risk of recurrence and the need for secondary therapy, surgeons should perform compartment-oriented CNDs when indicated.


Asunto(s)
Carcinoma Papilar , Neoplasias de la Tiroides , Carcinoma Papilar/patología , Carcinoma Papilar/cirugía , Estudios de Cohortes , Humanos , Ganglios Linfáticos/patología , Ganglios Linfáticos/cirugía , Metástasis Linfática/patología , Disección del Cuello/métodos , Recurrencia Local de Neoplasia/patología , Estudios Retrospectivos , Cáncer Papilar Tiroideo/patología , Cáncer Papilar Tiroideo/cirugía , Neoplasias de la Tiroides/patología , Neoplasias de la Tiroides/cirugía , Tiroidectomía/métodos
5.
Artículo en Inglés | MEDLINE | ID: mdl-32982961

RESUMEN

In our previous study, we have shown that CRLF1 can promote proliferation and metastasis of papillary thyroid carcinoma (PTC); however, the mechanism is unclear. Herein, we investigated whether the interaction of CRLF1 and MYH9 regulates proliferation and metastasis of PTC cells via the ERK/ETV4 axis. Immunohistochemistry (IHC), qPCR, and Western blotting assays were performed on PTC cells and normal thyroid cells to profile specific target genes. In vitro assays and in vivo assays were also conducted to examine the molecular mechanism. Results showed that CRLF1 directly bound MYH9 to enhance the stability of CRLF1 protein. Inhibition of MYH9 in PTC cells overexpressing CRLF1 significantly reversed malignant phenotypes, and CRLF1 overexpression activated ERK pathway, in vitro, and in vivo. RNA-sequencing revealed that ETV4 is a downstream target gene of CRLF1, which was up-regulated following ERK activation. Moreover, it was revealed that ETV4 is highly expressed in PTC tissues and is associated with poor prognosis. Finally, the ChIP assays showed that ETV4 induces the expression of matrix metalloproteinase 1 (MMP1) by binding to its promoter on PTC cells. Altogether, our study demonstrates that CRLF1 interacts with MYH9, promoting cell proliferation and metastasis via the ERK/ETV4 axis in PTC.


Asunto(s)
Biomarcadores de Tumor/metabolismo , Proliferación Celular , Sistema de Señalización de MAP Quinasas , Cadenas Pesadas de Miosina/metabolismo , Proteínas Proto-Oncogénicas c-ets/metabolismo , Receptores de Citocinas/metabolismo , Cáncer Papilar Tiroideo/secundario , Adolescente , Adulto , Anciano , Animales , Apoptosis , Biomarcadores de Tumor/genética , Femenino , Regulación Neoplásica de la Expresión Génica , Humanos , Masculino , Ratones , Ratones Endogámicos BALB C , Ratones Desnudos , Persona de Mediana Edad , Cadenas Pesadas de Miosina/genética , Pronóstico , Dominios y Motivos de Interacción de Proteínas , Proteínas Proto-Oncogénicas c-ets/genética , Receptores de Citocinas/genética , Tasa de Supervivencia , Cáncer Papilar Tiroideo/genética , Cáncer Papilar Tiroideo/metabolismo , Neoplasias de la Tiroides/genética , Neoplasias de la Tiroides/metabolismo , Neoplasias de la Tiroides/patología , Células Tumorales Cultivadas , Ensayos Antitumor por Modelo de Xenoinjerto , Adulto Joven
6.
Gland Surg ; 9(2): 474-477, 2020 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-32420277

RESUMEN

Primary squamous cell carcinoma (PSCC) is a rare neoplasm of the thyroid with a very poor prognosis. We report a case of a 42-year-old woman with occasionally found mass in the right anterior area of the neck. After a total thyroidectomy, histopathology and immunohistochemistry tests confirmed primary squamous cell carcinoma of the thyroid with the exclusion of all other possible primary tumor locations. 5 months later, PET scan discovered abnormality in right cervical lymph nodes with a fine needle aspiration confirming to be tumor recurrence. After a modified radical neck dissection was performed with pathological results of the neoplasms being PSCC of the thyroid origin, a full course consecutive radiotherapy was then followed. Due to a prompt diagnosis and the complete dissection of primary tumor and metastatic lymph nodes, no recurrence was observed at the follow-up visits. Comparing to the published cases of PSCC of the thyroid, our paper stated a whole process of diagnosis and standardized treatment, together with classical matched figures of pre-op examinations and dissected specimen. Furthermore, a review of the present literatures summarized the diagnosis, treatment and prognosis of thyroid PSCC. The management of PSCC requires a multi-disciplinary approach.

7.
Eur J Surg Oncol ; 45(11): 2086-2089, 2019 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-31395292

RESUMEN

BACKGROUND: The objective of the current study was to investigate the clinical significance of the suprasternal space lymph node (SSLN) in pathological node-positive (pN+) papillary thyroid carcinoma (PTC) patients. METHOD: One hundred and forty patients with pN + PTC who underwent neck dissection were enrolled into this study. SSLN was resected and used as a specimen to investigate the relationship of SSLN with several clinicopathological parameters. RESULTS: The metastasis rate of SSLN was 20.7%. On univariate analysis, we found that SSLN metastasis was significantly associated with primary cancer site (inferior portion), strap muscle invasion, level III metastasis, Level IV metastasis and lymph node metastasis between sternocleidomastoid and sternohyoid muscles. On multivariate analysis, primary cancer site (inferior portion), strap muscle invasion, Level IV metastasis and lymph node metastasis between sternocleidomastoid and sternohyoid muscles were independent risk factors for SSLN metastasis of PTC. CONCLUSION: For pN + PTC patients, special attention should be paid to the issue of SSLN metastasis.


Asunto(s)
Ganglios Linfáticos/patología , Músculos del Cuello/patología , Cáncer Papilar Tiroideo/patología , Neoplasias de la Tiroides/patología , Femenino , Humanos , Metástasis Linfática , Masculino , Persona de Mediana Edad , Análisis Multivariante , Disección del Cuello , Invasividad Neoplásica , Estadificación de Neoplasias , Estudios Retrospectivos , Factores de Riesgo , Esternón , Cáncer Papilar Tiroideo/cirugía , Neoplasias de la Tiroides/cirugía
8.
Front Oncol ; 9: 312, 2019.
Artículo en Inglés | MEDLINE | ID: mdl-31134145

RESUMEN

Background: Epstein-Barr virus (EBV) is associated with many epithelial malignancies. A few reports on the association between EBV and thyroid tumorigenesis have been investigated. However, the conclusion is highly contradictory. We aimed to explore the role of EBV in thyroid nodule development and its clinical significance in a cohort from southern China. Method: We conducted a retrospective data abstraction study of patients who underwent thyroidectomy between December 2017 and June 2018. We retrospectively analyzed the clinicopathological parameters and EBV infection status (serological antibodies and in situ hybridization). Result: The cohort comprised 384 patients with newly diagnosed thyroid diseases, including 261 papillary thyroid carcinomas, 87 nodular goiters, 21 follicular adenomas, 12 follicular thyroid carcinomas, and 3 medullary thyroid carcinomas. Forty-two (10.9%) patients were identified as being serological antibody positive. However, there was no association between the clinicopathological parameters and serological antibody positivity. Additionally, none of the patients showed EBER expression in thyroid normal/cancer cell nuclei in in situ hybridization. Conclusion: In this study, no correlation between EBV and thyroid diseases was found in a cohort from southern China.

9.
Cancer Manag Res ; 11: 1525-1532, 2019.
Artículo en Inglés | MEDLINE | ID: mdl-30863162

RESUMEN

BACKGROUND: Tyrosine kinase inhibitors (TKIs) have been administered to advanced or radio-iodine refractory differentiated thyroid carcinoma (RR-DTC) patients for years. We performed a pooled analysis to explore the frequency of severe adverse effects in advanced or RR-DTC patients treated with sorafenib and lenvatinib. METHODS: We performed a comprehensive search of computerized databases, including PubMed, Web of Science, Ovid, EMASE, and the Cochrane Library, from the drugs' inception to July 2018 to identify clinical trials. All grade and severe adverse events (AEs; grade ≥3) were analyzed. This meta-analysis was conducted in accordance with PRISMA guidelines. RESULTS: In total, seve studies published from 2012-2018 with 657 patients were eligible for this study. We included two studies (238 patients) that received 200 mg sorafenib twice and five studies (419 patients) that received 24 mg lenvatinib daily. The frequency of AEs was different among the two drugs. Patients in the sorafenib group had a significantly higher frequency of all grade hand-foot syndrome, hypocalcemia, rash, elevated alanine aminotransferase (ALT), and elevated aspartate aminotransferase (AST). Conversely, the lenvatinib group experienced more frequent all grade voice change, hypertension, nausea, and vomiting compared with those with sorafenib. For grade ≥3 adverse effects, hand-foot syndrome, hypocalcemia, and elevated ALT were more frequent in sorafenib-treated patients. Moreover, lenvatinib-treated patients had a significantly higher incidence of severe weight loss, hypertension, and nausea. CONCLUSION: Significant differences in common adverse effects, such as all-grade and severe AEs, were detected between sorafenib and lenvatinib in the current study. Early intervention and management of treatment-related AEs (TRAEs) can minimize the impact on patients' quality-of-life, and avoid unnecessary dose reductions and treatment-related discontinuations.

10.
Zhonghua Wei Chang Wai Ke Za Zhi ; 14(5): 340-2, 2011 May.
Artículo en Chino | MEDLINE | ID: mdl-21614687

RESUMEN

OBJECTIVE: To study the prevalence of tumor related anemia in patients with cancer in the digestive system. METHODS: A total of of 10 218 inpatients were diagnosed with cancer in the digestive system at the Peking Union Hospital from January 2000 to June 2009, which included esophageal cancer(n=1118), gastric cancer(n=2418), carcinoma of duodenum(n=134), carcinoma of small intestine(n=85), hepatocellular cancer(n=1508), cholangiocarcinoma(n=546), pancreatic cancer (n=1242), colon cancer(n=1582), and rectal cancer(n=1585). Patients with hemolytic anemia or hepatorenal dysfunction were excluded. Data pertaining to sex, age and hemoglobin were obtained by chart review. RESULTS: According to the China criteria of anemia, the overall anemia rate was 27.5% (2813/10 218). The prevalence of anemia was 64.7% for small bowel cancer, 60.5% for duodenal cancer, 42.6% for colon cancer, 36.6% for cholangiocarcinoma, 33.3% for gastric cancer, 22.6% for pancreatic cancer, 20.4% for rectal cancer, 18.7% for hepatocellular cancer, and 10.0% for esophageal cancer. Anemia was more common in older patients in those with gastric cancer, cholangiocarcinoma, pancreatic cancer, colon cancer and rectal cancer. There were more male anemic patients in those with cancer in the small intestine or cholangiocarcinoma. However, females were more commonly seen in those with hepatocellular cancer or pancreatic cancer. CONCLUSIONS: Anemia is common in patients with cancer in the digestive system. The prevalence of anemia is higher in patients with cancer in the duodenum carcinoma or small intestine, followed by colon cancer and gastric cancer, and then esophageal cancer. Anemia may be associated with age or gender in some types of cancer in the digestive system.


Asunto(s)
Anemia/epidemiología , Neoplasias del Sistema Digestivo/complicaciones , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Anemia/complicaciones , China/epidemiología , Femenino , Humanos , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Adulto Joven
11.
Zhonghua Wai Ke Za Zhi ; 49(1): 53-6, 2011 Jan 01.
Artículo en Chino | MEDLINE | ID: mdl-21418839

RESUMEN

OBJECTIVES: To determine the prevalence of cancer-related anemia and iron deficiency anemia (IDA) in patients with gastric and colorectal cancer in North of China. METHODS: A cross-sectional study of 262 inpatients diagnosed with gastric or colorectal cancer admitted to eight general hospitals in Beijing from August 2009 to December 2009 was performed. The blood samples were took on the day after admission and the seventh day after operation for the tests of hemoglobin, serum iron and ferritin. The morbidity of cancer-related anemia and IDA before and after the surgery was also compared respectively. RESULTS: The preoperative morbidity of cancer-related anemia was 36.6% in 131 patients with gastric cancer, and the morbidity of IDA was 52.1%. The mean age of the anemic patients was higher than that in cases without anemia [(62 ± 11) yrs vs. (57 ± 12) yrs, P < 0.05]; the postoperative morbidity of IDA increased to 72.6% (P < 0.05). In the 131 cases with colorectal cancer, the preoperative incidence of cancer-related anemia and IDA was 37.4% and 61.2%, respectively. About 45% of the cases with anemia had a tumor in the right colon. Postoperative incidence of IDA was significantly higher than that before the surgery (76.7%, P < 0.05). Only 10.3% of the anemic patients were treated with chalybeate therapy before surgical procedures, and the proportion was 22.7% after the operation. More than 50% of anemic patient received blood transfusion. CONCLUSIONS: Cancer-related anemia is a common clinical manifestation in patients with gastrointestinal cancer, and anemia occurs more frequently in elder and patients with right colon tumor. The treatment to cancer-related anemia is insufficient and a systematic therapy is needed to be established.


Asunto(s)
Anemia/epidemiología , Neoplasias Colorrectales/complicaciones , Neoplasias Gástricas/complicaciones , Adulto , Anciano , Anciano de 80 o más Años , Anemia/complicaciones , Neoplasias Colorrectales/cirugía , Estudios Transversales , Femenino , Humanos , Masculino , Persona de Mediana Edad , Periodo Perioperatorio , Neoplasias Gástricas/cirugía
12.
Zhongguo Yi Xue Ke Xue Yuan Xue Bao ; 33(5): 549-54, 2011 Oct.
Artículo en Chino | MEDLINE | ID: mdl-22338141

RESUMEN

OBJECTIVE: To analyze the risk factors of colorectal cancer-related anemia. METHOD: The clinical data of 319 patients with colorectal cancer were retrospectively analyzed for the possible risk factors of tumor-related anemia including tumor location, clinical stage, clinical symptoms, pathology, gender, and age. RESULTS: Of these 319 cases, 141 (44.20%) had anemia. The incidence of anemia was 62.20% among patients with right hemicolon cancers (including caecum cancer), and was 23.82% among patients with rectal cancer and 36.23% among those with transverse descending or sigmoid colon cancer. Cardia insufficiency, melena, tumor location, T staging, hypoproteinemia were also found to be related with anemia. Anemia and hypoproteinemia were the risk factors for perioperative blood transfusion (odds ratio = 3.004, odds ratio = 8.356, respectively). CONCLUSIONS: The colorectal cancer-related anemia is not associated with the clinical stage of the tumor, while cardiac insufficiency, melena, tumor location, tumor stage, and hypoproteinemia constitute the possible risk factors. Anemia and hypoproteinemia are the risk factors of perioperative blood transfusion.


Asunto(s)
Anemia/etiología , Neoplasias Colorrectales/complicaciones , Adulto , Anciano , Anciano de 80 o más Años , Femenino , Humanos , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Factores de Riesgo
13.
Ai Zheng ; 27(8): 788-94, 2008 Aug.
Artículo en Chino | MEDLINE | ID: mdl-18710610

RESUMEN

BACKGROUND & OBJECTIVE: No serum starvation could induce autophagy and cell cycle arrest. Although autophagy and cell cycle have been widely explored, little is known about their relationship. This study was to observe the change of Cyclin expression during starvation-induced autophagy to discuss the effect of autophagy on cell cycle. METHODS: In control group, HeLa cells were treated with d-Hanks solution (a medium with no serum). In experiment group, HeLa cells were treated with d-Hanks solution containing 3-methyladenine (3-MA, a specific inhibitor of autophagy). Cells were harvested after being starved for 0, 3, 6 and 12 h. Flow cytometry (FCM) and Weston blot were used to detect Cyclin and microtubule-associated protein 1 light chain 3(LC-3) which marked autophagy specifically. RESULTS: In control group, the expression of LC-3 protein was detected early after being starved for 3 h, and gradually increased along with starvation; the expression of Cyclin D3 and Cyclin E was decreased evidently after a short-time starvation (3 h) and descended to the minimum when cells were being starved for 6 h; the expression of Cyclin A and Cyclin B1 were apparently decreased after being starved for 6 h. In experiment group, LC-3 protein could not be detected during starvation when cells were exposed to 3-MA and the down-regulation of Cyclins was suppressed. CONCLUSIONS: Autophagy is involved in starvation-induced hydrolysis of Cyclins. The hydrolysis of Cyclin D3 and Cyclin E is quicker than that of Cyclin A and Cyclin B1.


Asunto(s)
Adenina/análogos & derivados , Autofagia/fisiología , Ciclo Celular/efectos de los fármacos , Ciclinas/metabolismo , Adenina/farmacología , Autofagia/efectos de los fármacos , Ciclina A/metabolismo , Ciclina B1/metabolismo , Ciclina D3/metabolismo , Ciclina E/metabolismo , Regulación hacia Abajo , Células HeLa , Humanos , Hidrólisis , Proteínas Asociadas a Microtúbulos/metabolismo
14.
Ai Zheng ; 25(9): 1063-8, 2006 Sep.
Artículo en Chino | MEDLINE | ID: mdl-16965643

RESUMEN

BACKGROUND & OBJECTIVE: Autophagy is the main phenomenon of type II programmed cell death which is also named as autophagic cell death, and autophagy has a close relationship with autophagic cell death. The relationship of apoptosis and cell cycle has been explored deeply, but little is known about the relationship of autophagic cell death and cell cycle. This study was to observe the correlation of autophagy induced by different methods to cell cycle. METHODS: Exponentially growing HeLa and SW480 cells, and peripheral blood lymphocytes (PBLs) from healthy donors, with or without 48 h stimulation of phytohemagglutinin (PHA), were treated with Hanks' solution (to produce starvation) or vincristine. Confocal laser microscope and transmission electron microscope (TEM) were used to detect autophagy; flow cytometry (FCM) was innovatively used to detect the cell cycle of autophagic cells with dipl-parameters of microtubule-associated protein 1 light chain 3 (MAP1-LC3-II)/PI. RESULTS: Autophagy of HeLa and SW480 cells induced by starvation or vincristine was observed in G1, S, and G2/M phases and increased along with the inducement time; no autophagy was observed in unstimulated PBLs. The positive rate of LC3-II, indicating the occurrence of autophagy, was lower than 2.62% when induced by starvation in Hanks' solution for 48 h, or 6.16% when induced by vincristine for 48 h. After PBLs were stimulated into cell cycle by PHA, autophagy was markedly detected 2 h after the indicated inducements. CONCLUSIONS: MAP1-LC3-II/DNA dipl-parameter analysis by FCM is a convenient and reliable method for simultaneously analyzing autophagy and cell cycle. Autophagy could be induced when cells are in cell cycle, while the cells in G0 phase are insensitive to the inducers.


Asunto(s)
Autofagia/efectos de los fármacos , Ciclo Celular/efectos de los fármacos , Neoplasias del Colon/patología , Proteínas Asociadas a Microtúbulos/metabolismo , Vincristina/farmacología , Línea Celular Tumoral , Células Cultivadas , Neoplasias del Colon/metabolismo , Citometría de Flujo , Células HeLa , Humanos , Linfocitos/citología , Linfocitos/metabolismo , Microscopía Confocal , Microscopía Electrónica de Transmisión
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