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Elizabeth G Bromfield, R John Aitken, Eileen A McLaughlin, Brett Nixon
STUDY QUESTION: Does oxidative stress compromise the protein expression of heat shock protein A2 (HSPA2) in the developing germ cells of the mouse testis? SUMMARY ANSWER: Oxidative stress leads to the modification of HSPA2 by the lipid aldehyde 4-hydroxynonenal (4HNE) and initiates its degradation via the ubiquitin-proteasome system. WHAT IS KNOWN ALREADY: Previous work has revealed a deficiency in HSPA2 protein expression within the spermatozoa of infertile men that have failed fertilization in a clinical setting...
December 8, 2016: Molecular Human Reproduction
Anna Slawinska, John C Hsieh, Carl J Schmidt, Susan J Lamont
Acute heat stress requires immediate adjustment of the stressed individual to sudden changes of ambient temperatures. Chickens are particularly sensitive to heat stress due to development of insufficient physiological mechanisms to mitigate its effects. One of the symptoms of heat stress is endotoxemia that results from release of the lipopolysaccharide (LPS) from the guts. Heat-related cytotoxicity is mitigated by the innate immune system, which is comprised mostly of phagocytic cells such as monocytes and macrophages...
2016: PloS One
Anders Patrik Gunnarsson, Rikke Christensen, Jian Li, Uffe Birk Jensen
The murine hair follicle contains several different keratinocyte progenitor populations within its compartments. By using antibodies against CD34, Itgα6, Sca-1 and Plet-1, we have isolated eight populations and compared their Krt10 and Krt14 expressions using fluorescence microscopy. This improved panel was used in our associated article doi:10.1016/j.scr.2016.06.002 (A.P. Gunnarsson, R. Christensen, J. Li, U.B. Jensen, 2016) [1] and the present dataset describes the basic controls for the FACS. We also used imaging flow cytometry to visualize the identified populations as control...
December 2016: Data in Brief
Anders Patrik Gunnarsson, Rikke Christensen, Jian Li, Uffe Birk Jensen
Several populations with stem cell characteristics have been identified in the mouse hair follicle, and some are characterized by specific subsets of surface markers. Here we investigate to what extend a multicolor panel of the four surface markers CD34, Sca-1, Integrin-α6 and Plet-1 is sufficient for separating previously described populations. We used global transcriptome profiling to characterize these, and we also performed transcriptome analysis of selected populations after two weeks of culturing. This has not been done before in a context of multiple populations...
July 2016: Stem Cell Research
Angelica Van Goor, Anna Slawinska, Carl J Schmidt, Susan J Lamont
Differences in responses of chicken bone marrow derived dendritic cells (BMDC) to in vitro treatment with lipopolysaccharide (LPS), heat, and LPS + heat were identified. The Fayoumi is more disease resistant and heat tolerant than the Leghorn line. Nitric Oxide (NO) production, phagocytic ability, MHC II surface expression and mRNA expression were measured. NO was induced in BMDC from both lines in response to LPS and LPS + heat stimulation; Fayoumi produced more NO with LPS treatment. Fayoumi had higher phagocytic ability and MHC II surface expression...
October 2016: Developmental and Comparative Immunology
Meizhu Bai, Dan Liang, Yinghua Wang, Qing Li, Yuxuan Wu, Jinsong Li
Tissue-specific knockout technology enables the analysis of the gene function in specific tissues in adult mammals. However, conventional strategy for producing tissue-specific knockout mice is a time- and labor-consuming process, restricting rapid study of the gene function in vivo. CRISPR-Cas9 system from bacteria is a simple and efficient gene-editing technique, which has enabled rapid generation of gene knockout lines in mouse by direct injection of CRISPR-Cas9 into zygotes. Here, we demonstrate CRISPR-Cas9-mediated spermatogenic cell-specific disruption of Scp3 gene in testes in one step...
May 20, 2016: Journal of Genetics and Genomics, Yi Chuan Xue Bao
Yonghong Tian, Lejun Li, Fengbin Zhang, Jian Xu
PURPOSE: Cell-free mRNAs (cfmRNAs) were quantitatively measured in human seminal plasma and its relationship with semen quality was investigated. METHODS: Herein, a prospectively, controlled investigation was performed to study seminal plasma HSPA2 and uPA cfmRNA alterations between 21 asthenozoospermic patients and 16 normozoospermic individuals. Standard semen analysis was performed and seminal plasma cfmRNAs content was measured by real-time quantitative PCR...
August 2016: Journal of Assisted Reproduction and Genetics
P Zambonelli, E Gaffo, M Zappaterra, S Bortoluzzi, R Davoli
Fat deposition is a widely studied trait in pigs because of its implications with animal growth efficiency, technological and nutritional characteristics of meat products, but the global framework of the biological and molecular processes regulating fat deposition in pigs is still incomplete. This study describes the backfat tissue transcription profile in Italian Large White pigs and reports genes differentially expressed between fat and lean animals according to RNA-seq data. The backfat transcription profile was characterised by the expression of 23 483 genes, of which 54...
June 2016: Animal Genetics
Wen-Hsin Chang, Bing-Ching Ho, Yi-Jing Hsiao, Jin-Shing Chen, Chien-Hung Yeh, Hsuan-Yu Chen, Gee-Chen Chang, Kang-Yi Su, Sung-Liang Yu
JAG1 is a Notch ligand that plays a critical role in multiple signaling pathways. However, the functionality of JAG1 in non-small cell lung cancer (NSCLC) has not been investigated thoroughly. By comparison of gene transcripted RNA profiles in the cell line pair with differential invasion ability, we identified JAG1 as a potential metastasis enhancer in lung cancer. Ectopic expression of JAG1 on lung cancer cells enhanced cell migration and invasion as well as metastasis in vitro and in vivo. Conversely, knockdown of JAG1 with siRNA in highly invasive cancer cells led to the reduction of migration and invasion...
2016: PloS One
Ming Liu, Min Li, Jiangfeng Liu, Hongkai Wang, Dandan Zhong, Hong Zhou, Baoxue Yang
BACKGROUND: Previous work found that urea accumulation in urothelial cells caused by urea transporter B knockout led to DNA damage and apoptosis that contributed to the carcinogenesis. The purpose of this study is to explore the potential connection between high urinary urea concentration and the bladder disorders. METHODS: A high protein diet rat model was conducted by feeding with 40 % protein diet. In-silico modeling and algorithm, based on the results of microarray and proteomics from the bladder urothelium, were used for the reconstruction of accurate cellular networks and the identification of novel master regulators in the high-protein diet rat model...
February 16, 2016: Journal of Translational Medicine
Ashok Agarwal, Rakesh Sharma, Luna Samanta, Damayanthi Durairajanayagam, Edmund Sabanegh
To study the major differences in the distribution of spermatozoa proteins in infertile men with varicocele by comparative proteomics and validation of their level of expression. The study-specific estimates for each varicocele outcome were combined to identify the proteins involved in varicocele-associated infertility in men irrespective of stage and laterality of their clinical varicocele. Expression levels of 5 key proteins (PKAR1A, AK7, CCT6B, HSPA2, and ODF2) involved in stress response and sperm function including molecular chaperones were validated by Western blotting...
March 2016: Asian Journal of Andrology
Elizabeth G Bromfield, Eileen A McLaughlin, Robert John Aitken, Brett Nixon
STUDY HYPOTHESIS: Given the importance of the chaperone Heat Shock Protein A2 (HSPA2) in the regulation of male fertility, this study aimed to identify and characterize additional proteins that may rely on the activity of this chaperone in human spermatozoa. STUDY FINDING: In view of the findings in this study we propose that angiotensin converting enzyme (ACE) and protein disulfide isomerase A6 (PDIA6) are novel interacting proteins of HSPA2 and that this multimeric complex may participate in key elements of the fertilization cascade...
February 2016: Molecular Human Reproduction
Elizabeth G Bromfield, R John Aitken, Amanda L Anderson, Eileen A McLaughlin, Brett Nixon
STUDY QUESTION: How does oxidative stress impact upon human sperm-egg interaction and in particular the formation of zona pellucida-receptor complexes on the sperm surface? SUMMARY ANSWER: Oxidative stress during human sperm capacitation resulted in the chemical alkylation of the molecular chaperone heat shock protein A2 (HSPA2), a concomitant reduction in surface expression of the zona pellucida-receptor arylsulphatase A (ARSA) and a severe loss of zona pellucida binding ability...
November 2015: Human Reproduction
Anna Habryka, Agnieszka Gogler-Pigłowska, Damian Sojka, Mariusz Kryj, Zdzisław Krawczyk, Dorota Scieglinska
HSPA2 belongs to the multigene HSPA family, whose members encode chaperone proteins. Although expression and function of HSPA2 is mainly associated with spermatogenesis, recent studies demonstrated that in humans, the gene is active in various cancers, as well as in normal tissues, albeit in a cell type-specific manner. In the epidermis, HSPA2 is expressed in keratinocytes in the basal layer. Currently, the mechanisms underlying the regulation of HSPA2 expression remain unknown. This study was aimed at determining whether HIF-1 and its binding site, the hypoxia-response element (HRE) located in the HSPA2 promoter, are involved in HSPA2 regulation...
September 2015: Biochimica et Biophysica Acta
Elizabeth Bromfield, R John Aitken, Brett Nixon
While a large cohort of sperm surface receptors underpin sperm-oocyte adhesion processes, our recent work has revealed that the molecular chaperone Heat Shock Protein A2 (HSPA2) is a key regulator of zona pellucida-receptor complex assembly in our own species. Indeed, in the infertile population, spermatozoa that fail to interact with the zona pellucida of the oocyte consistently lack HSPA2 protein expression. While the mechanisms behind this protein deficiency are under consideration, BCL2-associated athanogene 6 (BAG6) has been identified as a key regulator of HSPA2 stability in mouse germ cells...
October 2015: Molecular Human Reproduction
Teng Ma, Lu Xu, Hongzhi Wang, Jing Chen, Lu Liu, Guobin Chang, Guohong Chen
IMP (inosine 5'-monophosphate) is a compound that enhances the flavor of poultry meat. IMP has become a new breeding trait to improve poultry meat quality. We tried to identify several potential regulatory genes, and construct their predicted regulatory relationships. Time series gene expression profiles of thigh muscle tissues of Rugao chicken, a famous indigenous breed in China, were performed for analysis of genes that are co-expressed or correlated with the concentration of IMP. We found 15 crucial co-expression genes, which are Hspa2, Pten, Gabpa, Bpi, Mkl1, Srf, Cd34, Hspa4, Etv6, Bmpr2, Gde1, Igfbp5, Cd28, Pecam1 and Gja1, that may directly or indirectly regulate IMP metabolism...
2015: Journal of Animal Science and Biotechnology
Shih-Han Wang, Chuen-Yu Cheng, Pin-Chi Tang, Chih-Feng Chen, Hsin-Hsin Chen, Yen-Pai Lee, San-Yuan Huang
The expression of testicular genes following acute heat stress has been reported in layer-type roosters, but few similar studies have been conducted on broilers. This study investigated the effect of acute heat stress on the gene expression in the testes of a broiler-type strain of Taiwan country chickens. Roosters were subjected to acute heat stress (38°C) for 4 h, and then exposed to 25°C, with testes collected 0, 2, and 6 h after the cessation of heat stress, using non-heat-stressed roosters as controls (n = 3 roosters per group)...
2015: PloS One
Hui Zhang, Hongli Gao, Chengli Liu, Yalin Kong, Cheng Wang, Hongyi Zhang
BACKGROUND: It has been shown that heat shock-related 70-kDa protein 2 (HSPA2), a member of the HSP70 family of heat shock proteins, is important for cancer cell growth and metastasis. However, the status of HSPA2 expression and its prognostic significance in pancreatic cancer remain unknown. METHODS: Quantitative reverse transcriptase ploymerase chain reaction (qRT-PCR) was applied to examine HSPA2 messenger RNA (mRNA) expression in 104 pairs of pancreatic cancer tissues and adjacent noncancerous tissues...
2015: Diagnostic Pathology
Brett Nixon, Elizabeth G Bromfield, Matthew D Dun, Kate A Redgrove, Eileen A McLaughlin, R John Aitken
One of the most common lesions present in the spermatozoa of human infertility patients is an idiopathic failure of sperm-egg recognition. Although this unique cellular interaction can now be readily by-passed by assisted reproductive strategies such as intracytoplasmic sperm injection (ICSI), recent large-scale epidemiological studies have encouraged the cautious use of this technology and highlighted the need for further research into the mechanisms responsible for defective sperm-egg recognition. Previous work in this field has established that the sperm domains responsible for oocyte interaction are formed during spermatogenesis prior to being dynamically modified during epididymal maturation and capacitation in female reproductive tract...
July 2015: Asian Journal of Andrology
Zongguo Yang, Liping Zhuang, Peter Szatmary, Li Wen, Hua Sun, Yunfei Lu, Qingnian Xu, Xiaorong Chen
BACKGROUND: Heat shock proteins (HSPs) are overexpressed in human hepatocellular carcinoma (HCC) tissue and correlate with aggressiveness and prognosis of HCC. METHODS: Using the GSE14520 microarray expression profile from Gene Expression Omnibus, we compared HSP gene expression between tumour and non-tumour tissues and correlated this with outcomes in HCC patients. RESULTS: We analysed 220 hepatitis B virus (HBV)-related HCC patients and 25 HSPs in this study...
2015: International Journal of Medical Sciences
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