• 제목/요약/키워드: Insulin-like growth factor binding protein-3

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비소세포성 폐암 세포주에서 Farnesyl Transferase Inhibitor SCH66336과 인슐린양 성장 인자 결합 단백-3의 병용처리에 의한 세포고사 상승 작용 (Synergism Induced by Combination of Farnesyl Transferase Inhibitor SCH66336 and Insulin like-Growth Factor Binding Protein-3 in apoptosis of Non-Small Cell Lung Cancer Cell lines)

  • 김영;김세규;김형중;장준;안철민;김성규;장윤수
    • Tuberculosis and Respiratory Diseases
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    • 제58권2호
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    • pp.120-128
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    • 2005
  • 연구배경 : 인슐린 양 성장 인자 결합 단백질-3 (IGF binding protein-3, IGFBP-3)는 생체내와 실험관내에서 인슐린 양 성장인자 매개 신호전달 체계를 억제하여 비소 세포성 폐암 세포의 증식을 조절하는 것으로 알려져 있다. 이에 본 연구에서는 비소세포성 폐암의 치료에 있어 IGFBP-3를 이용한 치료전략의 개발을 위하여 IGFBP-3(Ad5CMV-BP3)와 FTI SCH66336의 병용치료 상승작용을 분석하였다. 방 법 : 비소세포성 폐암 세포주의 성장에 Ad5CMV-BP3와 SCH66336의 병용투여가 미치는 효과를 측정하기 위하여 비소세포성 폐암 세포주와 IGFBP-3를 발현하는 recombinant adenovirus(Ad5CMV-BP3)를 이용하였고 흉선이 없는 nude mice의 등에 H1299 폐암 세포를 피하 주사한 후 Ad5CMV-BP3와 SCH66336의 병용치료 상승작용을 단일 치료와 비교 분석하였다. 결 과 : SCH66336과 Ad5CMV-BP3 병용처리는 단일 약제보다 더 큰 증식 억제효과 상승작용을 보였으며 nude mice에서도 병용치료 시 종양의 부피는 매우 의미 있는 감소를 보였다. 결 론 : 본 연구의 결과를 통하여 저자들은 SCH66336이 IGFBP-3와 병용투여시 실험실내와 생체내에서 비소 세포성 폐암세포의 세포자멸사에 상승적인 효과가 있다는 것을 처음으로 입증하였으며, 이는 비소세포성 폐암의 치료에 있어 Ad5CMV-BP3와 SCH66336의 병용치료가 임상적으로 사용될 수 있음을 시사하는 것이라 하겠다.

Induction of Apoptosis by IGFBP3 Overexpression in Hepatocellular Carcinoma Cells

  • Han, Jian-Jun;Xue, De-Wen;Han, Qiu-Rong;Liang, Xiao-Hong;Xie, Li;Li, Sheng;Wu, Hui-Yong;Song, Bao
    • Asian Pacific Journal of Cancer Prevention
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    • 제15권23호
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    • pp.10085-10089
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    • 2015
  • Background: The insulin-like growth factor (IGF) system comprises a group of proteins that play key roles in regulating cell growth, differentiation, and apoptosis in a variety of cellular systems. The aim of this study was to investigate the role of insulin-like growth factor binding protein 3 (IGFBP3) in hepatocellular carcinoma. Materials and Methods: Expression of IGF2, IGFBP3, and PTEN was analyzed by qRT-PCR. Lentivirus vectors were used to overexpress IGFBP3 in hepatocellular carcinoma cell (HCC) lines. The effect of IGFBP3 on proliferation was investigated by MTT and colony formation assays. Results: Expression of IGF2, IGFBP3, and PTEN in several HCC cell lines was lower than in normal cell lines. After 5-aza-2'-deoxycytidine/trichostatin A treatment, significant demethylation of the promoter region of IGFBP3 was observed in HCC cells. Overexpression of IGFBP3 induced apoptosis and reduced colony formation in HUH7 cells. Conclusions: Expression of IGF2, IGFBP3, and PTEN in several HCC cell lines was lower than in normal cell lines. After 5-aza-2'-deoxycytidine/trichostatin A treatment, significant demethylation of the promoter region of IGFBP3 was observed in HCC cells. Overexpression of IGFBP3 induced apoptosis and reduced colony formation in HUH7 cells.

제대혈에서 아디포넥틴, 렙틴, 인슐린, IGF-I, IGFBP-3와 신생아의 신체계측과의 상관관계 (The relationship between adiponectin, leptin, insulin, insulin-like growth factor and IGF binding protein-3 in cord blood and neonatal anthropometric parameters)

  • 조혜정;김지영;김미진;황일태;이혜란
    • Clinical and Experimental Pediatrics
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    • 제51권7호
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    • pp.722-728
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    • 2008
  • 목 적 : 건강한 만삭아의 제대혈에서 아디포넥틴, 렙틴, 인슐린, IGF-I, IGFBP-3를 측정하여 출생체중, 신장, 지방량과의 관계를 알아보고자 하였다. 또한 적정 체중아 그룹에서 이 호르몬들의 출생후 1개월 동안 변화에 대해서 살펴보기로 하였다. 방 법 : 임신과 관련된 합병증이 없었던 산모에서 태어난 200명의 건강한 만삭아(남아 109명, 여아 91명)를 대상으로 하여 제대혈을 채취하여 혈장과 혈청을 분리하였고 출생체중, 출생신장, 머리둘레, 가슴둘레, 피부두께를 측정하였으며 폰더랄지수를 계산하였다. 대상 신생아들을 출생체중에 따라 AGA (n=132), SGA (n=29), LGA (n=39)의 세 그룹으로 나누었다. 적정체중아 중 15명에서 생후 3일, 7일, 30일에 신생아의 혈액을 채취하여 제대혈과 같은 방법으로 분리하였고 체중과 신장을 측정하였다. 결 과 : 아디포넥틴과 인슐린, IGF-I은 AGA, LGA군보다 SGA군에서 더 낮았다. 렙틴은 AGA, SGA군보다 LGA군에서 더 높았다. 아디포넥틴과 렙틴, 인슐린, IGF-I, IGFBP-3는 출생체중과 피부두께의 합과 양의 상관관계에 있었다. 출생 시 신장과 양의 상관관계를 보인 호르몬은 아디포넥틴, 렙틴, IGF-I이었다. 아디포넥틴은 렙틴과 양의 상관관계를 보였으나 인슐린, IGF-I, IGFBP-3와는 상관관계가 없었다. IGF-I은 남아보다 여아에서 더 높은 수치를 보였다. 출생 후 1개월 동안 렙틴은 생후 7일까지는 생리적 체중감소와 더불어 감소하다가 그 후 증가하였고 IGF-I 또한 생후 3일에 감소하다가 1개월 후 급격한 증가를 보였다. 결 론 : 아디포넥틴과 렙틴, 인슐린, IGF-I, IGFBP-3 모두 태아의 성장에 중요한 역할을 하며, 아디포넥틴은 인슐린, IGF-I 축과는 다른 기전으로 태아의 성장을 조절한다고 생각할 수 있었다. IGF-I은 남아에서보다 여아에서 더 높은 수치를 보여서 IGF-I의 성별간의 차이가 자궁 내에서도 존재하였다. 생후 1개월 동안의 성장에 다른 호르몬보다 IGF-I 이 더 중요한 역할을 한다는 사실을 알 수 있었다.

사료 내 미역(Undaria pinnatifida) 당단백질의 첨가가 넙치(Paralichthys olivaceus) 치어의 성장 및 면역 증강에 미치는 영향 (Effect of Supplementing the Diet of Olive Flounder Paralichthys olivaceus with Sea Mustard Undaria pinnatifida Glycoprotein on Growth and the Immune System)

  • 안철민;김강웅;김경덕;김영민;김인혜;박수진;최윤희;남택정
    • 한국수산과학회지
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    • 제45권5호
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    • pp.423-429
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    • 2012
  • This study evaluated the effects of adding sea mustard Undaria pinnatifida glycoprotein to the diet of juvenile olive flounder Paralichthys olivaceus on its growth, and levels of insulin-like growth factor I (IGF-I), IGF binding proteins (IGFBPs), and interleukins. Three experimental diets (U0, U0.5, and U1.0) were formulated that contained different amounts of an extract of U. pinnatifida (0, 0.5, and 1.0%, respectively). Experimental groups were established in triplicate (30 fish/group) and fed for 12 weeks. The experimental group fed 1.0% added U. pinnatifida glycoprotein had the greatest rate of weight gain, which differed significantly from the other experimental groups. SDS-PAGE of the plasma IGF-I and muscle protein showed that the experimental groups taking U. pinnatifida glycoprotein had significantly more IGF-I and a ca. 200 kDa protein, as compared to the control group. In addition, the amount of IGFBP-3 at ca. 43 kDa increased in the group given the U. pinnatifida extract, as compared to the control group. The interluekin-2, -4, -6, and -12 levels paralleled the level of growth factor in the groups given the U. pinnatifida extract. In conclusion, supplementing the diet of olive flounder with U. pinnatifida glycroprotein improved its growth and immunity.

착상기 Insulin-like Growth Factor System의 역할 (The Role of the Insulin-like Growth Factor System during the Periimplantation Period)

  • 이철영
    • 한국수정란이식학회지
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    • 제12권3호
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    • pp.229-246
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    • 1997
  • Implantation is a most important biological process during pregnancy whereby conceptus establishes its survival as well as maintenance of pregnancy. During the periimplantation period, both uterine endometriurn and conceptus synthesize and secrete a host of growth factors and cytokines which mediate the actions of estrogen and /or progesterone and also exert their steroid-independent actions. Growth factors expressed by the materno-conceptal unit en masse have important roles in cell migration, stimulation or inhibition of cell proliferation, cellular differentiation, maintenance of pregnancy and materno-conceptal communications in an autorcrine /paracrine manner. The present review focuses on the role of the intrauterine IGF system during periimplantation conceptus development. The IGF system comprises of IGF- I and IGF- II ligands, types I and II IGF receptors and six or more IGF-binding proteins(IGFBPs). IGFs and IGFBPs are expressed and secreted by uterine endometrium with tissue, pregnancy stage and species specificities under the influence of estrogen, progesterone and other growth factor(s). Conceptus also synthesizes components of the IGF system beginning from a period between 2-cell and blastocyst stages. Maternal IGFs are utilized by both maternal and conceptal tissues; conceptus-derived growth factors are believed to be taken up primarily by conceptus. IGFs enhance the development of both maternal and conceptal compartments in a wide range of biological processes. They stimulate proliferation and differentiation of endometrial cells and placental precursor cells including decidual transformation from stromal cells, placental formation and the synthesis of some steroid and protein hormones by differentiated endometrial cells or placenta. It is also well-documented in a number of experimental settings that both IGFs stimulate preimplantation embryo development. In slight contrast to these, prenatal mice carrying a null mutation of IGF and /or IGF receptor gene do not exhibit any apparent growth retardation until after implantation. Reason (s) for this discrepancy between the knock-out result and the in vitro ones, however, is not known. IGFBPs, in general, are believed to inhibit IGF action within the materno-conceptal unit, thereby allowing endometrial stromal cell differentiation as well as dampening ex cessive placental invasion into maternal tissue. There is evidence, however, indicating that IGFBP can enhance IGF action depending on environrnental conditions perhaps by directioning IGF ligand to the target cell. There is also a third possibility that certain IGFBPs and their proteolytic fragments may have their own biological activities independent of the IGF. In addition to IGFBPs, IGFBP proteases including those found within the uterine tissue or lumen are thought to enhance IGF bioavailability by degrading their substrates without affecting their bound ligand. In this regard, preliminary results in early pregnant pigs suggest that a partially characterized IGFBP protease activity in uterine luminal fluid enhances intrauterine IGF bioavailability during conceptus morphological development. In summary, a number of in vitro results indicate that IGFs stimulates the development of the rnaterno-conceptal unit during the periimplantation period. IGFBPs appear to inhibit IGF action by sequestering their ligands, whereas IGFBP proteases are thought to enhance intrauterine bioavailability of IGFs. Much is remaining to be clarified, however, regarding the roles of the individual IGF system components. These include in vivo evidence for the role of IGFs in early conceptus development, identification of IGF-regulated genes and their functions, specific roles for individual IGFBPs, identification and characterization of IGFBP proteases. The intrauterine IGF club house thus will be paying a lot of attention to forthcoming results in above and other areas, with its door wide-open!

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Differential Gene Expression in Estradiol-3-Benzoate-Treated Liver and Chemically- Induced Hepatocellular Carcinoma

  • KIM , SEYL;KANG, JIN-SEOK;JANG, DONG-DEUK;LEE, KOOK-KYUNG;KIM, SOON-AE;HAN, BEOM-SEOK;PARK, YOUNG-IN
    • Journal of Microbiology and Biotechnology
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    • 제14권6호
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    • pp.1286-1294
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    • 2004
  • In a previous study by the current authors, hepatocellular carcinoma (HCC) was determined to be epidemiologically sex-dependent, and the incidence and multiplicity of HCC found to decrease in estradiol-3 benzoate (EB)-treated F344 rats. Therefore, to ascertain the anticancer mechanism of EB, a commercially available cDNA microarray, with a total of 14,815 cDNA rat gene clones, was used to determine the differentially expressed genes in nontreated livers, EB-treated livers, and diethynitrosolamine (DEN)-induced HCC. In the sequenced experiment, a total of 85 genes were differentially expressed at either two or more times the rate of the normal expression, where 33 genes were downregulated by EB, and 52 genes upregulated. Candidate genes were selected according to significant changes observed in the mRNA expression in the EB-treated livers compared with the nontreated livers, then these genes were filtered according to their different expression patterns in the DEN-induced tumors compared to the estrogen-treated livers. To confirm the microarray data, a real-time PCR analysis was performed for ten selected genes: the H-ras revertant protein 107 (H­rev107), insulin-like growth factor binding protein (lOFBP), parathyroid hormone receptor (PI'HR), SH3 domain binding protein (SH3BP), metallothionein, src-suppressed C-kinase substrate (SSeCK) gene, phosphodiesterase I, CD44, epithelial membrane protein 3 (EMP3), and estrogen receptor a (ERa). The SSeCK and phosphodiesterase I genes were both upregulated in the DEN-induced hepatocarcinomas, yet their possible carcinogenic functions remain unknown. Meanwhile, the other genes were downregulated, including the genes related to growth regulation (IOFBP, H-revI07, ER$\alpha$), adipogenesis inhibition (PTHR), and tumor suppression (metallothionein).

Prostate Cancer Risk in Relation to a Single Nucleotide Polymorphism in the Insulin-like Growth Factor-binding Protein-3 (IGFBP3) Gene: a Meta-analysis

  • Mao, Ye-Qing;Xu, Xin;Lin, Yi-Wei;Chen, Hong;Hu, Zheng-Hui;Xu, Xiang-Lai;Zhu, Yi;Wu, Jian;Zheng, Xiang-Yi;Qin, Jie;Xie, Li-Ping
    • Asian Pacific Journal of Cancer Prevention
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    • 제13권12호
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    • pp.6299-6303
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    • 2012
  • Insulin-like growth factor-binding protein-3 (IGFBP3) has been identified as a putative tumor suppressor with multifunctional roles in the IGF axis. Recently, there have been a growing body of studies investigating the relation between the IGFBP3 A-202C polymorphism, circulating IGFBP3 and prostate cancer risk, but their outcomes varied leading to controversy. Hence, it is necessary to perform a meta-analysis covering all eligible studies to shed a light on the association of IGFBP3 A-202C and cancer risk. Finally, we included a total of 11 relevant articles between 2003 and 2010 covering 14 case-control studies including 9,238 cases and 8,741 controls for our analysis. Our results showed that A-202C was a marginal risk factor of prostate cancer (allele contrast: OR=1.08, 95% CI :1.01-1.16; dominant model: OR=1.11, 95% CI :1.01-1.22; heterozygote codominant model: OR=1.11, 95% CI :1.03-1.18; homozygote contrast: OR=1.19, 95% CI :1.03-1.37). Stratification analysis revealed that sample size and control source were two major heterogeneous meta-factors especially in the recessive model (source: Population-based control group :p=0.30,I2=16.7%, Hospital-based control group: p=0.20, I2=30.3%; sample size: Small: p=0.22,I2= 32.8%, Medium: p=0.09,I2=48%, Large p=0.60,I2=0.0%); However, contrary to previous findings, no significance was found in racial subgroups. No significant publication bias was found in our analysis. Considering the robustness of the results and the discrepancy among some studies, there might be some unsolved confounding factors, and further more critical large studies are needed for confirmation.

Determination of optimal dietary valine concentrations for improved growth performance and innate immunity of juvenile Pacific white shrimp Penaeus vannamei

  • Daehyun Ko;Chorong Lee;Kyeong-Jun Lee
    • Fisheries and Aquatic Sciences
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    • 제27권3호
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    • pp.171-179
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    • 2024
  • A study was conducted to evaluate dietary valine (Val) requirement for Pacific white shrimp (Penaeus vannamei). Five isonitrogenous (353 g/kg) and isocaloric (4.08 kcal/g) semi-purified diets containing graded levels of Val (2.7, 5.1, 8.7, 12.1 or 16.0 g/kg) were formulated. Quadruplicate groups of 12 shrimp (average body weight: 0.46 ± 0.00 g) were fed one of the experimental diets (2%-5% of total body weight) for 8 weeks. Maximum weight gain was observed in 8.7 g/kg Val group. However, the growth performance was reduced when Val concentration in diets were higher than 12.1 g/kg. Feed conversion ratio was significantly increased with 2.7 and 16.0 g/kg Val inclusion. Shrimp fed the diets containing 2.7 g/kg Val showed significantly lower protein efficiency ratio, whole-body crude protein and Val concentrations. Dietary inclusion of Val significantly improved the relative expression of insulin-like growth factor binding protein and immune-related genes (prophenoloxidase, lysozyme and crustin) in the hepatopancreas and 8.7 g/kg Val group showed highest expression among all the groups. The dietary requirement of Val for maximum growth of juvenile P. vannamei, estimated using polynomial regression analysis on growth, was 9.54 g/kg of Val (27.2 g/kg based on protein level) and maximum growth occurred at 9.27 g/kg of Val (26.2 g/kg based on protein level) based on broken-line regression analysis.

Insulin-like Growth Factor Systems의 생식기능에서의 역할;자궁편 (Roles of the Insulin-like Growth Factor System in the Reproductive Function;Uterine Connection)

  • 이철영
    • Clinical and Experimental Reproductive Medicine
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    • 제23권3호
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    • pp.247-268
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    • 1996
  • 여포와 난포의 성숙, 배란과 착상, 임신의 유지와 태아의 성장 발달, 분만 및 유선발육과 비유 등 일련의 생식현상에서 있어서 성선자극호르몬과 스테로이드 호르몬의 작용이 중추적인 역할을 한다는 사실은 오래 전부터 알려져왔다. 그러나 이러한 일련의 현상에 고전적인 호르몬 외에도 다수의 성장인자가 관여되고 있음이 최근의 연구 결과 밝혀지고 있다. 생식기관에서 성장인자들은 대부분 autocrine/paracrine mode로 작용하여, 성선자극호르몬과 스테로이드 호르몬의 작용을 매개하거나 이들 호르몬 등과 교호적인 작용(synergy)을 한다. 생식기관 내 insulin-like growth factor(IGF) system은 최근 가장 활발히 연구된 분야 중의 하나로 생식현상의 전반에 걸쳐 중요한 역할을 하고 있음이 밝혀졌다. 본 지면에서는 IGF system에 관한 개괄적인 정보를 소개하고 현재까지 보고된 intrauterine IGF system에 관한 연구를 요약하고자 한다. IGF family는 IGF-I과 IGF-II ligands, 두종류의 IGF receptors(수용체), 그리고 지금까지 발견된 6종류의 IGF-binding proteins(IGFBPs)로 이루어져 있다. IGF-I과 IGF-II는 proinsulin과 상동한 구조를 가진 peptide로서 포도당과 아미노산 운반을 자극하는 등 insulin과 유사한 작용을 한다. 이 외에도 IGFs는 세포분열촉진제(mitogens)로서 여러 형태의 세포에 걸쳐 세포증식을 자극하고, 세포의 분화(differentiation)과 세포기능의 발현에 관여한다. IGFs는 간과 주로 messenchymal cells에서 발현되어 endocrine mode는 물론 autocrine/paracrine mode로 거의 모든 조직에 작용한다. IGF 수용체는 두종류가 알려져 있는데 type I IGF receptor는 tyrosine kinase로서 IGF-I과 IGF-II에 공히 high-affinity를 나타내고, 상기한 대부분의 IGFs의 작용을 매개한다. Type II IGF receptor 혹은 IGF-II/mannose-6-phosphate receptor는 두개의 서로 다른 binding sites를 가지고 있는데 IGF-II binding site는 IGF-II에만 high-affinity를 나타낸다. Type II IGF receptor의 주요 역할은 IGF-II를 lysosomal targeting하여 ligand를 파괴하는데 있다. 체액 속의 IGFs는 대부분 IGFBP에 결합되어 있다. IGFBPs는 IGF의 저장/운반체 혹은 IGF 작용을 조절하는 역할을 하는 것으로 알려져 있으나 개개 IGFBP의 역할에 대해서는 지극히 제한된 정보만이 알려져 있다. IGFBPs의 IGF ligands에의 affinity는 IGF receptors의 IGFs에의 affinity보다 크기 때문에 대부분의 in vitro 상황 하에서 IGFBPs는 IGF 작용을 억제한다. IGFBP에 결합되어 있는 IGF가 어떤 기작에 의해 IGFBP로부터 분리되어 IGF receptor에 도달하는지는 알려지지 않고 있으나, 혈액과 조직액에 들어있는 불특정 IGFBP protease activity는 IGF의 방출과정에서 일역을 하는 것으로 믿어지고 있다. 최근 연구보고에 의하면 특정 in vitro 상황 하에서 IGFBP-1, -3, -5 등은 IGF와 무관한 작용도 있다는 증빙이 있어 IGF system의 또 다른 차원을 예고하고 있다. IGF family members의 mRNAs & proteins는 영장류, 설치류 및 가축의 자궁조직과 수태물(conceptus)에서 발현되어 자궁과 태아의 성장 발달에 중요한 역할을 한다. 자궁조직의 IGF system의 발현은 성선호르몬, 국소 생리조절인자 등에 의해 발현시기와 장소의 특이성이 결정되며, 발현된 IGFs와 IGFBPs는 autocrine/paracrine mode로 자궁조직에 작용하기도 하고, 자궁강에 분비되어 수태물의 성장 발달에 관여한다. 착상을 전후하여 수태물에서도 IGF system이 발현되는데 개개 IGF family member의 발현 시기는 모체로부터 유래된 mRNA의 유무, 수태물 자체의 genetic programming, 모체와의 상호작용 등에 의해 결정되고, IGFs의 작용 부위 역시 시간(생리적 상태)과 장소의 특이성이 있다. 이와같이 conceptus IGF system의 발현이 시간적, 공간적으로 조절되고있다는 사실은 IGFs가 수태물의 성장 발달에 일역을 한다는 가설을 간접적으로 지지해 준다. 자궁조직과 수태물에서 발현된 IGFs는 세포의 증식과 분화, 포도당과 아미노산의 운반과 단백질합성, placental lactogen과 prolactin 등과 같은 유선자극호르몬의 생성을 자극하고 스테로이드 호르몬의 합성에도 관여한다. 태아의 성장 발달에 있어서 IGFs의 역할은 embryo의 IGF-I, IGF-II, 혹은 IGF receptor gene을 homologous recombination technique에 의해 파괴(gene targeting)하여을 때의 결과로써 입증되었다. 생쥐의 IGF and/or IGF-II gene 혹은 IGF receptor gene을 파괴했을 때 출생 전후 모두 성장 발달이 지연되며 출생시 무게는 정상치의 30-60% 수준에 머물고, 특히 type I IGF receptor gene 혹은 IGF-I과 IGF-II genes를 모두 파괴했을 경우에는 출생 후 곧 치사한다. 자궁 내의 IGFBPs는 IGF ligands를 자궁 내에 제한시키거나 IGFs의 receptor binding을 억제하는 negative regulators 역할을 하는 것으로 믿어지고 있다. 그러나 영장류의 자궁에서 IGFBP-I과 같은 특정 IGFBP는 IGFs보다 월등히 많은 양이 발현 분비되고 있는 것으로 추산되고 있으며, 또한 이 단백질은 모체탈락막세포에서 분비되는 주요 단백질 중의 하나라는 점을 감안할 때 IGFBP-I이 IGF과 무관한 작용이 있을 가능성도 배제할 수 없다. 따라서 IGFBPs의 역할 규명은 IGF system을 이해하는데 중요한 부분을 차지하고 있어 향후 이 분야의 연구에 많은 기대와 촛점이 모여지고 있다.

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Alterations of mRNA and lncRNA profiles associated with the extracellular matrix and spermatogenesis in goats

  • Chen, Haolin;Miao Xiaomeng;Xu, Jinge;Pu, Ling;Li, Liang;Han, Yong;Mao, Fengxian;Ma, Youji
    • Animal Bioscience
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    • 제35권4호
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    • pp.544-555
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    • 2022
  • Objective: Spermatozoa are produced within the seminiferous tubules after sexual maturity. The expression levels of mRNAs and lncRNAs in testicular tissues are different at each stage of testicular development and are closely related to formation of the extracellular matrix (ECM) and spermatogenesis. Therefore, we set out to study the expression of lncRNAs and mRNAs during the different developmental stages of the goat testis. Methods: We constructed 12 RNA libraries using testicular tissues from goats aged 3, 6, and 12 months, and studied the functions of mRNAs and lncRNAs using the gene ontogeny (GO) and Kyoto encyclopedia of genes and genomes (KEGG) databases. Relationships between differentially expressed genes (DEGs) were analyzed by lncRNA-mRNA co-expression network and protein-protein interaction network (PPI). Finally, the protein expression levels of matrix metalloproteinase 2 (MMP2), insulin-like growth factor 2 (IGF2), and insulin-like growth factor-binding protein 6 (IGFBP6) were detected by western blotting. Results: We found 23, 8, and 135 differentially expressed lncRNAs and 161, 12, and 665 differentially expressed mRNAs that were identified between 3 vs 6, 6 vs 12, and 3 vs 12 months, respectively. GO, KEGG, and PPI analyses showed that the differential genes were mainly related to the ECM. Moreover, MMP2 was a hub gene and co-expressed with the lncRNA TCONS-0002139 and TCONS-00093342. The results of quantitative reverse-transcription polymerase chain reaction verification were consistent with those of RNA-seq sequencing. The expression trends of MMP2, IGF2, and IGFBP6 protein were the same as that of mRNA, which all decreased with age. IGF2 and MMP2 were significantly different in the 3 vs 6-month-old group (p<0.05). Conclusion: These results improve our understanding of the molecular mechanisms involved in sexual maturation of the goat testis.