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1.
damo Davi Digenes Siena Isabela Ichihara de Barros Camila Baldin Storti Carlos Alberto Oliveira de Biagi Júnior Larissa Anastacio da Costa Carvalho Silvya Stuchi MariaEngler Josane de Freitas Sousa Wilson Araújo Silva Jr 《Journal of cellular and molecular medicine》2022,26(3):671
Our previous work using a melanoma progression model composed of melanocytic cells (melanocytes, primary and metastatic melanoma samples) demonstrated various deregulated genes, including a few known lncRNAs. Further analysis was conducted to discover novel lncRNAs associated with melanoma, and candidates were prioritized for their potential association with invasiveness or other metastasis‐related processes. In this sense, we found the intergenic lncRNA (ENSG00000230454) and decided to explore its effects in melanoma. For that, we silenced the lncRNA U73166 expression using shRNAs in a melanoma cell line. Next, we experimentally investigated its functions and found that migration and invasion had significantly decreased in knockdown cells, indicating an essential association of lncRNA U73166 for cancer processes. Additionally, using naïve and vemurafenib‐resistant cell lines and data from a patient before and after resistance, we found that vemurafenib‐resistant samples had a higher expression of lncRNA U73166. Also, we retrieved data from the literature that indicates lncRNA U73166 may act as a mediator of RNA processing and cell invasion, probably inducing a more aggressive phenotype. Therefore, our results suggest a relevant role of lncRNA U73166 in metastasis development. We also pointed herein the lncRNA U73166 as a new possible biomarker or target to help overcome clinical vemurafenib resistance. U73166相似文献
2.
Ch. Sultan J. M. Lobaccaro S. Lumbroso S. Missov Ch. Belon M. Bost R. Dumas 《Andrologie》1994,4(3):283-287
Klinfelter syndrome was first described in adult males with gynecomastia, azoospermia and hypergonadotropic hypogonadism. Children with the 47, XXY karyotype demonstrate few clinical findings so Klinefelter syndrome is rarely diagnosed until adult life. Besides children who have been diagnosed during prenatal genetic testing, in infancy a male with 47, XXY (or variants: 46, XY-47, XXY; 48, XXXY; 48, XXYY, 49, XXXXY) may be found while undergoing evaluation of micropenis, hypospadias, cryptorchidism or facial anomalies. The older child may present with learning disabilities, behavior disorders or tall stature. At the time of puberty, the clinical picture includes small testes, gynecomastia and an eunuchoid habitus. Early diagnosis of Klinefelter syndrome must be performed since it has been demonstrated that early treatment with androgens may ameliorate many aspects of the clinical symptoms and attenuate or prevent behavioral and psychiatric disorders associated with 47, XXY males. 相似文献
3.
In this short report, the genome-wide homologous recombination events were re-evaluated for classical swine fever virus (CSFV) strain . We challenged a previous study which suggested only one recombination event in AF407339 based on 25 CSFV genomes. Through our re-analysis on the 25 genomes in the previous study and the 41 genomes used in the present study, we argued that there should be possibly at least two clear recombination events happening in AF407339 through genome-wide scanning. The reasons for identifying only one recombination event in the previous study might be due to the limited number of available CSFV genome sequences at that time and the limited usage of detection methods. In contrast, as identified by most detection methods using all available CSFV genome sequences, two major recombination events were found at the starting and ending zones of the genome AF407339, respectively. The first one has two parents AF407339 (minor) and AF333000 (major) with beginning and ending breakpoints located at 19 and 607 nt of the genome respectively. The second one has two parents AY554397 (minor) and AF531433 (major) with beginning and ending breakpoints at 8397 and 11,078 nt of the genome respectively. Phylogenetic incongruence analysis using neighbor-joining algorithm with 1000 bootstrapping replicates further supported the existence of these two recombination events. In addition, we also identified additional 18 recombination events on the available CSFV strains. Some of them may be trivial and can be ignored. In conclusion, CSFV might have relatively high frequency of homologous recombination events. Genome-wide scanning of identifying recombination events should utilize multiple detection methods so as to reduce the risk of misidentification. GQ902941相似文献
4.
Bacterial regeneration of ammonium and phosphate as affected by the carbon:nitrogen:phosphorus ratio of organic substrates 总被引:10,自引:2,他引:8
Yasuhiko Tezuka 《Microbial ecology》1990,19(3):227-238
The effect of carbonnitrogenphosphorus (CNP) ratio of organic substrates on the regeneration of ammonium and phosphate was investigated by growing natural assemblages of freshwater bacteria in mineral media supplemented with the simple organic C, N, and P sources (glucose, asparagine, and sodium glycerophosphate, respectively) to give 25 different substrate CNP ratios. Both ammonium and phosphate were regenerated when CN and NP atomic ratios of organic substrates were 101 and 161, respectively. Only ammonium was regenerated when CN and NP ratios were 101 and 10–201, respectively. On the other hand, neither ammonium nor phosphate was regenerated when CN and NP ratios were 151 and 51, respectively. In no case was phosphate alone regenerated. As bacteria were able to alter widely the CNP ratio of their biomass, the growth yield of bacteria appeared primarily dependent on the substrate carbon concentration, irrespective of a wide variation in the substrate CNP ratio. 相似文献
5.
6.
Integrin 5 1 and 2 1 are the major integrin receptors in human hepatocytes. However, in human hepatocellular carcinoma cells it was found that the expression of integrin 5 1 was decreased and another integrin 6 1 increased. In this study, the SMMC7721 human hepatocellular carcinoma cells cotransfected or singlely transfected with integrin 5 and/or 1 cDNAs were established, and designated 5 1.6-7721, 5.3-7721, and 1.6-7721 cell lines, respectively. Transfection with cDNAs of integrin 5 and 1 subunits resulted in the overexpression of each integrin and modified biological properties, including a slowed growth rate, changes in the cell cycle from 15.5% of control cells in the G2/M phase to 12.1%, 9.6% and 9.4% in 5.3-7721, 1.6-7721, 5 1.6-7721, respectively, and a decrease in the Cell Mitosis Index from 1.6 in controls to 0.96, 0.95, and 0.72, and 34%, 28% and 52% derived from colony forming ability, respectively. Tumorigenicity was also tested in nude mice with inoculation of cells subcutaneously. Tumor masses growing in nude mice following inoculation with 1.6-7721,and 5 1.6-7721 cells weighed only 52% or 31% those of control cells. These results indicated that deletion or low expression of integrin 5 1 may play an important role in the development of hepatocellular carcinoma. Therefore, induction of expression of the integrin 5 1 in malignant cells could be a potential means of treating hepatocellular carcinoma. 相似文献
7.
Senbagam Duraisamy Fazal Husain Senthilkumar Balakrishnan Aswathy Sathyan Prabhu Subramani Prahalathan Chidambaram Selvaraj Arokiyaraj Wahidah H. Al-Qahtani Jothiramalingam Rajabathar Anbarasu Kumarasamy 《Current issues in molecular biology》2022,44(2):731
Breast milk is the combination of bioactive compounds and microflora that promote newborn’s proper growth, gut flora, and immunity. Thus, it is always considered the perfect food for newborns. Amongst their bioactives, probiotic communities—especially lactic acid bacteria (LAB)—are characterized from breast milk over the first month of parturition. In this study, seven LAB were characterized phenotypically and genotypically as Levilactobacillus brevis BDUMBT08 (), L. gastricus BDUMBT09 ( MT673657), L. paracasei BDUMBT10 ( MT774596), L. brevis BDUMBT11 ( MT775430), L. casei BDUMBT12 ( MW785062), L. casei BDUMBT13 ( MW785063), and Brevibacillus brevis M2403 ( MW785178) from human breast milk. Their tolerance to lysozyme, acid, bile, gastric juice, pancreatic juice, and NaCl and potential for mucoadhesion, auto-aggregation, and co-aggregation with pathogens are of great prominence in forecasting their gut colonizing ability. They proved their safety aspects as they were negative for virulence determinants such as hemolysis and biofilm production. Antibiogram of LAB showed their sensitivity to more than 90% of the antibiotics tested. Amongst seven LAB, three isolates (L. brevis BDUMBT08 and BDUMBT11, and L. gatricus BDUMBT09) proved their bacteriocin producing propensity. Although the seven LAB isolates differed in their behavior, their substantial probiotic properties with safety could be taken as promising probiotics for further studies to prove their in vivo effects, such as health benefits, in humans. MK371781相似文献
8.
9.
Bryony N. Parsons Suzanne Humphrey Anne Marie Salisbury Julia Mikoleit Jay C. D. Hinton Melita A. Gordon Paul Wigley 《PLoS neglected tropical diseases》2013,7(10)
Salmonella enterica serovar Typhimurium Sequence Type (ST) 313 is a major cause of invasive non-Typhoidal salmonellosis in sub-Saharan Africa. No animal reservoir has been identified, and it has been suggested that ST313 is adapted to humans and transmission may occur via person-to-person spread. Here, we show that ST313 cause severe invasive infection in chickens as well as humans. Oral infection of chickens with ST313 isolates and Q456 resulted in rapid infection of spleen and liver with all birds infected at these sites by 3 days post-infection. In contrast, the well-defined ST19 S. Typhimurium isolates F98 and 4/74 were slower to cause invasive disease. Both ST19 and ST313 caused hepatosplenomegaly, and this was most pronounced in the ST313-infected animals. At 3 and 7 days post-infection, colonization of the gastrointestinal tract was lower in birds infected with the ST313 isolates compared with ST19. Histological examination and expression of CXCL chemokines in the ileum showed that both D23580 (ST313) and 4/74 (ST19) strains caused increased CXCL expression at 3 days post-infection, and this was significantly higher in the ileum of D23580 vs 4/74 infected birds. At 7 days post-infection, reduced chemokine expression occurred in the ileum of the D23580 but not 4/74-infected birds. Histological analysis showed that D23580 infection resulted in rapid inflammation and pathology including villous flattening and fusion at 3 days post-infection, and subsequent resolution by 7 days. In contrast, 4/74 induced less inflammation and pathology at 3 days post-infection. The data presented demonstrate that ST313 is capable of causing invasive disease in a non-human host. The rapid invasive nature of infection in the chicken, coupled with lower gastrointestinal colonization, supports the hypothesis that ST313 is a distinct pathovariant of S. Typhimurium that has evolved to become a systemic pathogen that can cause disease in several hosts. D23580相似文献
10.
Nidiane D. R. Prado Soraya S. Pereira Michele P. da Silva Michelle S. S. Morais Anderson M. Kayano Leandro S. Moreira-Dill Marcos B. Luiz Fernando B. Zanchi André L. Fuly Maribel E. F. Huacca Cleberson F. Fernandes Leonardo A. Calderon Juliana P. Zuliani Luiz H. Pereira da Silva Andreimar M. Soares Rodrigo G. Stabeli Carla F. C. Fernandes 《PloS one》2016,11(3)
Antivenoms, produced using animal hyperimmune plasma, remains the standard therapy for snakebites. Although effective against systemic damages, conventional antivenoms have limited efficacy against local tissue damage. Additionally, the hypersensitivity reactions, often elicited by antivenoms, the high costs for animal maintenance, the difficulty of producing homogeneous lots, and the instability of biological products instigate the search for innovative products for antivenom therapy. In this study, camelid antibody fragments (VHH) with specificity to Bothropstoxin I and II (BthTX-I and BthTX-II), two myotoxic phospholipases from Bothrops jararacussu venom, were selected from an immune VHH phage display library. After biopanning, 28 and 6 clones recognized BthTX-I and BthTX-II by ELISA, respectively. Complementarity determining regions (CDRs) and immunoglobulin frameworks (FRs) of 13 VHH-deduced amino acid sequences were identified, as well as the camelid hallmark amino acid substitutions in FR2. Three VHH clones (, KF498607, and KF498608) were capable of recognizing BthTX-I by Western blot and showed affinity constants in the nanomolar range against both toxins. VHHs inhibited the BthTX-II phospholipase A2 activity, and when tested for cross-reactivity, presented specificity to the Bothrops genus in ELISA. Furthermore, two clones ( KC329718 and KC329718) neutralized the myotoxic effects induced by B. jararacussu venom, BthTX-I, BthTX-II, and by a myotoxin from Bothrops brazili venom (MTX-I) in mice. Molecular docking revealed that VHH CDRs are expected to bind the C-terminal of both toxins, essential for myotoxic activity, and to epitopes in the BthTX-II enzymatic cleft. Identified VHHs could be a biotechnological tool to improve the treatment for snake envenomation, an important and neglected world public health problem. KF498607相似文献
11.
通过对近些年关于护理人员职业价值观研究的回顾与总结,对关键词“价值观”“工作价值观”“职业价值观”“护士职业价值观”“护士工作价值观”“护生价值观”“护生职业价值观”“护生工作价值观”“医学生职业价值观”“组织价值观”“道德价值观”进行网络检索。针对护理人员职业价值观内涵的总结与界定,形成构成护理人员职业价值观因素分析,提出研究护理人员职业价值观时代新意。 相似文献
12.
Barbara L. Bernardo Timothy S. Wachtmann Patricia G. Cosgrove Max Kuhn Alan C. Opsahl Kyle M. Judkins Thomas B. Freeman John R. Hadcock Nathan K. LeBrasseur 《PloS one》2010,5(6)
Background
Interventions for T2DM have in part aimed to mimic exercise. Here, we have compared the independent and combined effects of a PPARδ agonist and endurance training mimetic () and a myostatin antibody and resistance training mimetic (PF-879) on metabolic and performance outcomes in obese insulin resistant mice. GW501516Methodology/Principal Findings
Male ob/ob mice were treated for 6 weeks with vehicle, , PF-879, or GW501516 in combination with PF-879. The effects of the interventions on body composition, glucose homeostasis, glucose tolerance, energy expenditure, exercise capacity and metabolic gene expression were compared at the end of study. GW501516 attenuated body weight and fat mass accumulation and increased the expression of genes of oxidative metabolism. In contrast, PF-879 increased body weight by driving muscle growth and altered the expression of genes involved in insulin signaling and glucose metabolism. Despite their differences, both interventions alone improved glucose homeostasis. Moreover, GW501516 more effectively improved serum lipids, and PF-879 uniquely increased energy expenditure, exercise capacity and adiponectin levels. When combined the robust effects of GW501516 and/or PF-879 on body weight, adiposity, muscle mass, glycemia, serum lipids, energy expenditure and exercise capacity were highly conserved. GW501516Conclusions/Significance
The data, for the first time, demonstrate postnatal inhibition of myostatin not only promotes gains in muscle mass similar to resistance training,but improves metabolic homeostasis. In several instances, these effects were either distinct from or complimentary to those of . The data further suggest that strategies to increase muscle mass, and not necessarily oxidative capacity, may effectively counter insulin resistance and T2DM. GW501516相似文献13.
A. J. Hall A. Masel K. Bell J. A. Halliday D. C. Shaw J. L. VandeBerg 《Biochemical genetics》2001,39(1-2):59-71
The major proteins of baboon milk were identified as -lactoglobulin (LG), -lactalbumin (LA), lysozyme, lactoferrin, casein, and albumin by immobiline isoelectric focusing, SDS-PAGE, immunoblotting of gels with rabbit antisera to human LA, lysozyme, and albumin and bovine LG and casein, and N-terminal sequencing of proteins blotted from gels. The first 30 N-terminal residues of baboon LG are identical to those of macaque (Macaca fasicularis) LG except for a (D/N) polymorphism at residue 2. The complete cDNA sequence and derived amino acid composition of LG were elucidated using RT-PCR amplification of poly(A)+ mRNA purified from lactating mammary gland. Baboon LG consists of 168 amino acid residues (Mr 20,750) and is the longest LG identified to date. LG and LA polymorphisms with three (A, B, and C) and two (A and B) variants, respectively, were detected by immobiline IEF, pH 4–6, of individual baboon milk samples at varying stages of lactation. 相似文献
14.
15.
The combination of docetaxel, cisplatin, and S-1 (DCS) is a common chemotherapy regimen for patients with gastric cancer (GC). However, studies on long noncoding RNAs (lncRNAs) associated with the chemotherapeutic response to and prognosis after DCS remain lacking. The aim of the present study was to identify DCS mRNAs-lncRNAs associated with chemotherapy response and prognosis in GC patients. In the present study, we identified 548 lncRNAs associated with these 16 mRNAs in the TCGA and datasets. Eleven lncRNAs were used to construct a prognostic signature by least absolute shrinkage and selection operator (LASSO) regression. A model including the 11 lncRNAs (LINC02532, GSE31811, AC005324.4, AC007277.1, AL512506.1, AC068790.7, AC022509.2, LINC00106, AC113139.1, MIR100HG, and UBE2R2-AS1) associated with the prognosis of GC was constructed. The signature was validated in the TCGA database, model comparison, and qRT-PCR experiments. The results showed that the risk signature was a more effective prognostic factor for GC patients. Furthermore, the results showed that this model can well predicting chemotherapy drug response and immune infiltration of GC patients. In addition, our experimental results indicated that lower expression levels of LINC00106 and UBE2R2-AS1 predicted worse drug resistance in AGS/DDP cells. The experimental results agreed with the predictions. Furthermore, knockdown of LINC00106 or UBE2R2-AS1 can significantly enhanced the proliferation and migration of GC AGS cells in vitro. In conclusion, a novel DCS therapy-related lncRNA signature may become a new strategy to predict chemotherapy response and prognosis in GC patients. LINC00106 and UBE2R2-AS1 may exhibit a tumor suppressive function in GC. AC005165.1相似文献
16.
17.
Flavia Pichiorri Hiroshi Okumura Tatsuya Nakamura Preston N. Garrison Pierluigi Gasparini Sung-Suk Suh Teresa Druck Kelly A. McCorkell Larry D. Barnes Carlo M. Croce Kay Huebner 《The Journal of biological chemistry》2009,284(2):1040-1049
We have previously shown that Fhit tumor suppressor protein interacts with
Hsp60 chaperone machinery and ferredoxin reductase (Fdxr) protein.
Fhit-effector interactions are associated with a Fhit-dependent increase in
Fdxr stability, followed by generation of reactive oxygen species and
apoptosis induction under conditions of oxidative stress. To define Fhit
structural features that affect interactions, downstream signaling, and
biological outcomes, we used cancer cells expressing Fhit mutants with amino
acid substitutions that alter enzymatic activity, enzyme substrate binding, or
phosphorylation at tyrosine 114. Gastric cancer cell clones stably expressing
mutants that do not bind substrate or cannot be phosphorylated showed
decreased binding to Hsp60 and Fdxr and reduced mitochondrial localization.
Expression of Fhit or mutants that bind interactor proteins results in
oxidative damage and accumulation of cells in G2/M or
sub-G1 fractions after peroxide treatment; noninteracting mutants
are defective in these biological effects. Gastric cancer clones expressing
noncomplexing Fhit mutants show reduction of Fhit tumor suppressor activity,
confirming that substrate binding, interaction with heat shock proteins,
mitochondrial localization, and interaction with Fdxr are important for Fhit
tumor suppressor function.Fhit protein is a powerful tumor suppressor that is frequently lost or
reduced in cancer cells because of rearrangement of the exquisitely DNA
damage-sensitive fragile FHIT gene. Restoration of Fhit expression
suppresses tumorigenicity of cancer cells of various types, and the ability to
induce apoptosis in cancer cells in vitro is reduced by specific Fhit
mutations (1,
2).Through studies of signal pathways affected by Fhit expression, by searches
for Fhit protein effectors, and by in vitro analyses of Fhit
activity, we and others have defined Fhit enzymatic activity in vitro
(3), apoptotic activity in
cells and tumors
(4–6),
and most recently identification of a Fhit protein complex that affects Fhit
stability, mitochondrial localization, and interaction with ferredoxin
reductase (Fdxr)5
(7). The complex includes Hsp60
and Hsp10 that mediate Fhit stability and may affect import into mitochondria,
where Fhit interacts with Fdxr, which is responsible for transferring
electrons from NADPH to cytochrome P450 via ferredoxin. Virally mediated Fhit
restoration in Fhit-deficient cancer cells increases production of
intracellular reactive oxygen species (ROS), followed by increased apoptosis
of cancer cells under oxidative stress conditions; conversely, Fhit-negative
cells escape apoptosis, likely carrying oxidative DNA damage that contributes
to accumulation of mutations.The Fhit protein sequence, showing high homology to the histidine triad
(HIT) family of proteins, suggested that the protein product would hydrolyze
diadenosine tetraphosphate or diadenosine triphosphate (Ap3A)
(8), and in vitro
studies showed that Ap3A was cleaved into ADP and AMP by Fhit. The
catalytic histidine triad within Fhit was essential for catalytic activity
(3), and a Fhit mutant that
substituted Asn for His at the central histidine (H96N mutant) was
catalytically inactive, although it bound substrate well
(3). Early tumor suppression
studies showed that cancer cells stably transfected with wild type (WT) or
H96N mutant Fhit were suppressed for tumor growth in nude mice. This suggested
the hypothesis that the Fhit-substrate complex sends the tumor suppression
signal (9,
10). To test this hypothesis,
a series of FHIT alleles was designed to reduce substrate-binding
and/or hydrolytic rates and was characterized by quantitative cell-death
assays on cancer cells virally infected with each allele. The allele series
covered defects as great as 100,000-fold in kcat and
increases as large as 30-fold in Km. Mutants with
2–7-fold increases in Km had significantly reduced
apoptotic indices and the mutant with a 30-fold increase in
Km retained little apoptotic function. Thus, the
proapoptotic function of Fhit, which is likely associated with tumor
suppressor function, is limited by substrate binding and is unrelated to
substrate hydrolysis (11).Fhit, a homodimeric protein of 147 amino acids, is a target of tyrosine
phosphorylation by the Src family protein kinases, which can phosphorylate
Tyr-114 of Fhit in vitro and in vivo
(12). After co-expression of
Fhit with the Elk tyrosine kinase in Escherichia coli to generate
phosphorylated forms of Fhit, unphosphorylated, mono-, and diphosphorylated
Fhit were purified, and enzyme kinetics studies showed that monophosphorylated
Fhit exhibited monophasic kinetics with Km and
kcat values ∼2- and ∼7-fold lower, respectively,
than for unphosphorylated Fhit. Diphosphorylated Fhit exhibited biphasic
kinetics; one site had Km and kcat
values ∼2- and ∼140-fold lower, respectively, than for
unphosphorylated Fhit; the second site had a Km
∼60-fold higher and a kcat ∼6-fold lower than for
unphosphorylated Fhit (13).
Thus, it was possible that the alterations in Km and
kcat values for phosphorylated forms of Fhit might favor
formation and lifetime of the Fhit-Ap3A complex and enhance tumor
suppressor activity (see Fhit forms
Kinetic parameters
% Sub-G1
Direct binding
Subcellular location
Co-IP in vivo
8-OHdG
Apoptosis
Tumor suppressor
Km (mm) kcat (s–1) A549 MKN74 Hsp60 Fdxr Hsp60 Fdxr
Fhit WT
1.6 +/– 0.19
2.7 +/– 0.95
43
24
Yes
Yes
Cyt & mito
Yes
Yes
Yes
Yes
Yes
Catalyt mutants H96D
Up 2-fold
Down >2 × 104 29
NT
NT
NT
Cyt & mito
Yes
Yes
NT
Yes
NT
H96N
Up 2-fold
Down >5 × 105
31
14.4
NT
NT
Cyt & mito
Yes
Yes
Yes
Yes
Yes
Loop mutants Y114A
Up 23-fold
Down 2-fold
3.7
NT
NT
NT
Cyt
+/–
+/–
+/–
No
No
Y114D
NT
NT
2.9
6
NT
NT
Cyt
+/–
+/–
–
No
–/+
Y114E
NT
NT
NT
NT
NT
NT
Cyt & mito
–/+
–/+
–
No
NT
Y114F
Up 5-fold
Up 1.1-fold
11.5
3
NT
NT
Cyt & mito
–/+
–/+
–
No
No
Y114W
Up 5-fold
Up 1.4-fold
NT
NT
NT
NT
Cyt & mito
–/+
–
–
NT
NT
del113–117
Up 10-fold
Down 38-fold
5
NT
NT
NT
NT
NT
NT
–
No
NT
Other mutants L25W
Up 7-fold
Down 4-fold
15
NT
NT
NT
Cyt
–
–
–
NT
–/+
I10W,L25W
Up 32-fold
Down 6-fold
11
NT
NT
NT
NT
NT
NT
NT
NT
NT
F5W
Up 3.3 fold
NT
NT
5
NT
NT
NT
NT
NT
+/–
No
NT
Purified pFhit pFhit
Down 0.4-fold
Down 7-fold
NA
NA
–/+
Yes
NA
NA
NA
NA
NA
NA
ppFhit
Down 0.4-fold
Down > 100-fold
NA
NA
–/+
Yes
NA
NA
NA
NA
NA
NA
Up 60-fold
Down 6-fold