Colorectal cancer(CRC)remains one of the leading causes of mortality from malignant diseases worldwide.In general terms,CRC presents high heterogeneity due to the influence of different genetic and environmental facto...Colorectal cancer(CRC)remains one of the leading causes of mortality from malignant diseases worldwide.In general terms,CRC presents high heterogeneity due to the influence of different genetic and environmental factors;also,the neoplastic cells are strongly influenced by the extracellular matrix and several surrounding cells,known together as the tumor microenvironment(TME).Bidirectional communication takes place between the tumor and the TME through the release of autocrine and paracrine factors.Parathyroid hormone-related peptide(PTHrP)is a cytokine secreted by a wide variety of tissues and is able to regulate several cellular functions both in physiological as well as in pathological processes.It exerts its effects as a paracrine/autocrine factor,although its mode of action is mainly paracrine.It has been shown that this peptide is expressed by several tumors and that the tumor secretion of PTHrP is responsible for the malignant humoral hypercalcemia.Eight years ago,when our research group started studying PTHrP effects in the experimental models derived from intestinal tumors,the literature available at the time addressing the effects of PTHrP on colorectal tumors was limited,and no articles had been published regarding to the paracrine action of PTHrP in CRC cells.Based on this and on our previous findings regarding the role of PTH in CRC cells,our purpose in recent years has been to explore the role of PTHrP in CRC.We analyzed the behavior of CRC cells treated with exogenous PTHrP,focalizing in the study of the following events:Survival,cell cycle progression and proliferation,migration,chemoresistance,tumor-associated angiogenesis,epithelial to mesenchymal transition program and other events also associated with invasion,such us the induction of cancer stem cells features.This work summarizes the major findings obtained by our investigation group using in vitro and in vivo CRC models that evidence the participation of PTHrP in the acquisition of an aggressive phenotype of CRC cells and the molecular mechanisms involved in these processes.Recently,we found that this cytokine induces this malignant behavior not only by its direct action on these intestinal cells but also through its influence on cells derived from TME,promoting a communication between CRC cells and surrounding cells that contributes to the molecular and morphological changes observed in CRC cells.These investigations establish the basis for our next studies in order to address the clinical applicability of our findings.Recognizing the factors and mechanisms that promote invasion in CRC cells,evasion to the cytotoxic effects of current CRC therapies and thus metastasis is decisive for the identification of new markers with the potential to improve early diagnosis and/or to predict prognosis,to predetermine drug resistance and to provide treatment guidelines that include targeted therapies for this disease.展开更多
IgG Heavy Chain Disease (γHCD) is a rare plasma cell disorder. Hypercalcemia related to plasma cell dyscrasias is related to non-PTHrP related mechanisms. Here we describe the first case of a patient with γHCD and P...IgG Heavy Chain Disease (γHCD) is a rare plasma cell disorder. Hypercalcemia related to plasma cell dyscrasias is related to non-PTHrP related mechanisms. Here we describe the first case of a patient with γHCD and PTHrP related hypercalcemia. Methods: Patient case derived from chart review from 2011 to 2015. Literature review performed searching PubMed 1968-current. Results: The patient was diagnosed with hypercalcemia with elevated PTHrP and exclusion of other etiologies of hypercalcemia. She was diagnosed with (γHCD) by M-spike 0.64 g/dL, IFE showing a broad band of IgG heavy chain, without associated light chains and severe depression of the non-mono-clonal IgG. Serum immunoglobulins demonstrated elevated IgG (2110 mg/dL), normal IgA (46 mg/dL) and decreased IgM (<21 mg/dL). Bone marrow biopsy showed 5% PCs, non-clonal by kappa/lambda, but exclusive for IgG by IHC, without any staining for IgA or IgM. The patient was started on therapy with improved hypercalcemia and PTHrP levels. Conclusions: This is the first reported case of γHCD presenting with PTHrP related hypercalcemia. Given that skeletal involvement is uncommon in γHCD, hypercalcemia secondary to γHCD may at times be a PTHrP driven phenomenon and we recommend that this test be ordered in such cases.展开更多
Humoral Hypercalcemia of Malignancy (HHM) has been reported in association with a number of malignancies. In gynecologic malignancies, ovarian Clear Cell Carcinoma (CCC) is one of the most commonhistologic subtypes, w...Humoral Hypercalcemia of Malignancy (HHM) has been reported in association with a number of malignancies. In gynecologic malignancies, ovarian Clear Cell Carcinoma (CCC) is one of the most commonhistologic subtypes, whereas HHM caused by endometrial CCC is very rare. We report a case of endometrial CCC with HHM, with a low serum intact PTH level, elevated serum PTH-related Peptide (PTH-rP), and immunohistochemically demonstrated PTH-rP in the neoplasm.展开更多
慢性肾脏病(chronic kidney disease,CKD)-矿物质和骨异常(mineral and bone disorder,MBD)引发的血管钙化(vascular calcification,VC)导致了CKD患者的高心血管死亡率,是CKD重要的临床并发症。骨标志物可观测或参与到VC的过程,对VC的...慢性肾脏病(chronic kidney disease,CKD)-矿物质和骨异常(mineral and bone disorder,MBD)引发的血管钙化(vascular calcification,VC)导致了CKD患者的高心血管死亡率,是CKD重要的临床并发症。骨标志物可观测或参与到VC的过程,对VC的防治起到重要作用。本文将对VC的发生机制进行深入学习,并对常见的骨标志物如甲状旁腺激素(PTH)-25羟维生素D(25-VitD)-成纤维细胞生长因子23(FGF23)-Klotho间的相互反馈影响、骨钙素(osteocalcin,OCN)、I型胶原羧基端肽β特殊序列(carboxy-terminal peptideβspecial sequence,β-CTX)、总Ⅰ型胶原氨基端延长肽(total type I collagen amino-terminal extension peptide,tP1NP)及研究进展做一综述。展开更多
目的通过观察不同血液净化方式的联合应用对血液透析患者血清中骨代谢指标及骨质疏松患病率的影响,来评价血液透析方式的不同组合对血液透析患者矿物质和骨异常(mineral and bone disorder,MBD)的影响。方法维持性血液透析患者90例,随...目的通过观察不同血液净化方式的联合应用对血液透析患者血清中骨代谢指标及骨质疏松患病率的影响,来评价血液透析方式的不同组合对血液透析患者矿物质和骨异常(mineral and bone disorder,MBD)的影响。方法维持性血液透析患者90例,随机分为血液透析组(对照组或HD组)、血液透析加血液透析滤过组(HD+HDF组)、血液透析加血液灌流组(HD+HP组),每组30例,观察6个月,比较组内及组间6个月前后血钙、血磷、全段甲状旁腺激素(intact parathyroid hormone,iPTH)、成纤维生长因子23(fibroblast growth factor23,FGF-23)、β-I型胶原羧基末端肽(β-Type I collagen carboxy-terminal peptide,β-CTX)、I型前胶原氨基末端肽(Type I procollagen amino-terminal peptide,PINP)、骨质疏松患病率等指标的变化来评价不同透析方式的组合对血液透析患者MBD的影响。结果组内自身前后比较:HD组血磷[(2.21±0.55)mmol/l vs.(2.64±1.04)mmol/l,t=2.047、P=0.049]、iPTH[(427.7±44.00)pg/ml vs.(452.1±43.00)pg/ml,t=2.140,P=0.038]变化有统计学差异;HD+HDF组的iPTH下降有统计学差异[(465.3±43.02)pg/ml vs.(431.0±37.39)pg/ml,t=3.298,P=0.007];HD+HP组的iPTH[(457.4±60.01)pg/mlvs.(389.1±29.89)pg/ml,t=5.598,P=0.001)、β-CTX[(2.73±1.16)ng/ml vs.(2.13±1.51)ng/ml,t=2.142,P=0.045];PINP[(157.92±31.16)ng/mlvs.(140.76±36.13)ng/ml,t=2.106,P=0.047];FGF-23[(461.16±101.69)ng/ml vs.(397.30±63.18)ng/ml,t=2.922,P=0.011]下降均有统计学意义。组间比较6个月后,HD+HDF组PINP为(147.33±40.72)ng/ml,HD组PINP为(165.32±43.11)ng/ml,二者比较有统计学差异(t=1.969,P=0.048);HD+HDF组FGF-23(465.38±101.36)ng/ml,HD组FGF-23(403.56±96.81)ng/ml,二者比较HD+HDF组更低,有统计学差异(t=2.415,P=0.019);组间比较6个月后,HD+HP组与HD组比较,血磷[(2.02±0.81)mmol/L vs.(2.64±1.04)mmol/L,t=3.221,P=0.003]、iPTH[(389.1±29.89)pg/ml vs.(452.1±43.0)pg/ml,t=6.661,P=0.005]、β-CTX[(2.13±1.51)ng/ml vs.(2.95±1.28)ng/ml,t=2.278,P=0.031]、PINP[(140.76±36.13)ng/ml vs.(165.32±43.11)ng/ml,t=2.339,P=0.028]、FGF-23[(397.30±63.18)ng/ml vs.(465.38±101.36)ng/ml,t=3.114,P=0.003],上述指标HD+HP组较HD组更低,均有统计学意义;组间比较6个月后,HD+HP组与HD+HDF组比较iPTH分别为(389.1±29.89)ng/ml、(431.0±37.39)ng/ml,HD+HP组更低,有统计学意义(t=7.303,P=0.000)。骨质疏松患病率:对照组观察期后骨质疏松和骨量低下的病例数增加,但无统计学意义;HD+HDF组、HD+HP组骨质疏松的病例数有减少,亦无统计学意义(P>0.05)。结论不同的血液透析方式的联合使用对维持性血液透析患者MBD影响不同;血液透析联合血液透析滤过或血液灌流的治疗方式较单纯血液透析有利MBD的改善;血液透析联合血液灌流在骨代谢指标的改善方面更具优势。展开更多
基金Supported by Agencia Nacional de Promoción Científica y Tecnológica,No. PICT-2013-1441Consejo Nacional de Investigaciones Científicas y Técnicas,No. PIP11220150100350+3 种基金Instituto Nacional del Cáncer,Asistencia financiera Ⅱ,No. 12002-4395-14-1Instituto Nacional del Cáncer,Asistencia Financiera Ⅲ,No. RESOL-2016-1006-E-APN-MSUniversidad Nacional del Sur,Argentina,No. PGI:24/B230PGI:24/B303
文摘Colorectal cancer(CRC)remains one of the leading causes of mortality from malignant diseases worldwide.In general terms,CRC presents high heterogeneity due to the influence of different genetic and environmental factors;also,the neoplastic cells are strongly influenced by the extracellular matrix and several surrounding cells,known together as the tumor microenvironment(TME).Bidirectional communication takes place between the tumor and the TME through the release of autocrine and paracrine factors.Parathyroid hormone-related peptide(PTHrP)is a cytokine secreted by a wide variety of tissues and is able to regulate several cellular functions both in physiological as well as in pathological processes.It exerts its effects as a paracrine/autocrine factor,although its mode of action is mainly paracrine.It has been shown that this peptide is expressed by several tumors and that the tumor secretion of PTHrP is responsible for the malignant humoral hypercalcemia.Eight years ago,when our research group started studying PTHrP effects in the experimental models derived from intestinal tumors,the literature available at the time addressing the effects of PTHrP on colorectal tumors was limited,and no articles had been published regarding to the paracrine action of PTHrP in CRC cells.Based on this and on our previous findings regarding the role of PTH in CRC cells,our purpose in recent years has been to explore the role of PTHrP in CRC.We analyzed the behavior of CRC cells treated with exogenous PTHrP,focalizing in the study of the following events:Survival,cell cycle progression and proliferation,migration,chemoresistance,tumor-associated angiogenesis,epithelial to mesenchymal transition program and other events also associated with invasion,such us the induction of cancer stem cells features.This work summarizes the major findings obtained by our investigation group using in vitro and in vivo CRC models that evidence the participation of PTHrP in the acquisition of an aggressive phenotype of CRC cells and the molecular mechanisms involved in these processes.Recently,we found that this cytokine induces this malignant behavior not only by its direct action on these intestinal cells but also through its influence on cells derived from TME,promoting a communication between CRC cells and surrounding cells that contributes to the molecular and morphological changes observed in CRC cells.These investigations establish the basis for our next studies in order to address the clinical applicability of our findings.Recognizing the factors and mechanisms that promote invasion in CRC cells,evasion to the cytotoxic effects of current CRC therapies and thus metastasis is decisive for the identification of new markers with the potential to improve early diagnosis and/or to predict prognosis,to predetermine drug resistance and to provide treatment guidelines that include targeted therapies for this disease.
文摘IgG Heavy Chain Disease (γHCD) is a rare plasma cell disorder. Hypercalcemia related to plasma cell dyscrasias is related to non-PTHrP related mechanisms. Here we describe the first case of a patient with γHCD and PTHrP related hypercalcemia. Methods: Patient case derived from chart review from 2011 to 2015. Literature review performed searching PubMed 1968-current. Results: The patient was diagnosed with hypercalcemia with elevated PTHrP and exclusion of other etiologies of hypercalcemia. She was diagnosed with (γHCD) by M-spike 0.64 g/dL, IFE showing a broad band of IgG heavy chain, without associated light chains and severe depression of the non-mono-clonal IgG. Serum immunoglobulins demonstrated elevated IgG (2110 mg/dL), normal IgA (46 mg/dL) and decreased IgM (<21 mg/dL). Bone marrow biopsy showed 5% PCs, non-clonal by kappa/lambda, but exclusive for IgG by IHC, without any staining for IgA or IgM. The patient was started on therapy with improved hypercalcemia and PTHrP levels. Conclusions: This is the first reported case of γHCD presenting with PTHrP related hypercalcemia. Given that skeletal involvement is uncommon in γHCD, hypercalcemia secondary to γHCD may at times be a PTHrP driven phenomenon and we recommend that this test be ordered in such cases.
文摘Humoral Hypercalcemia of Malignancy (HHM) has been reported in association with a number of malignancies. In gynecologic malignancies, ovarian Clear Cell Carcinoma (CCC) is one of the most commonhistologic subtypes, whereas HHM caused by endometrial CCC is very rare. We report a case of endometrial CCC with HHM, with a low serum intact PTH level, elevated serum PTH-related Peptide (PTH-rP), and immunohistochemically demonstrated PTH-rP in the neoplasm.
文摘慢性肾脏病(chronic kidney disease,CKD)-矿物质和骨异常(mineral and bone disorder,MBD)引发的血管钙化(vascular calcification,VC)导致了CKD患者的高心血管死亡率,是CKD重要的临床并发症。骨标志物可观测或参与到VC的过程,对VC的防治起到重要作用。本文将对VC的发生机制进行深入学习,并对常见的骨标志物如甲状旁腺激素(PTH)-25羟维生素D(25-VitD)-成纤维细胞生长因子23(FGF23)-Klotho间的相互反馈影响、骨钙素(osteocalcin,OCN)、I型胶原羧基端肽β特殊序列(carboxy-terminal peptideβspecial sequence,β-CTX)、总Ⅰ型胶原氨基端延长肽(total type I collagen amino-terminal extension peptide,tP1NP)及研究进展做一综述。
