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PMID |
Sentence |
1 |
17616479
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Recently, two isoforms of sphingomyelin synthase (SMS1 and SMS2), the last enzyme for SM de novo synthesis, have been cloned.
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17616479
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We have hypothesized that SMS1 and SMS2 are the two most likely candidates responsible for the SM levels in the cells and on the plasma membrane.
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17616479
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To test this hypothesis, cultured cells were treated with tricyclodecan-9-yl-xanthogenate (D609), an inhibitor of SMS, or with SMS1 and SMS2 siRNAs.
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17616479
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We measured cellular lipid levels, including SM, ceramide, phosphatidylcholine, and diacylglycerol and found that SMS1 and SMS2 siRNA treatment caused a significant decrease of SM levels (20% and 11%, respectively), compared to control siRNA treatment; SMS1 but not SMS2 siRNA treatment caused a significant increase of ceramide levels (10%).
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17616479
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There was a decreasing tendency for diacylglycerol levels after both SMS1 and SMS2 siRNA treatment, however, it was not statistical significant.
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17616479
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As shown by lipid rafts isolation and lipid determination, SMS1 and SMS2 siRNA treatment led to a decrease of SM content in detergent-resistant lipid rafts on the cell membrane.
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17616479
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Furthermore, SMS1 and SMS2 siRNA-treated cells had a stronger resistance than did control siRNA-treated cells to lysenin (a protein that causes cell lysis due to its affinity for plasma membrane SM).
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8 |
17616479
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These results indicate that both SMS1 and SMS2 contribute to SM de novo synthesis and control SM levels in the cells and on the cell membrane including plasma membrane, implying an important relationship between SMS activity and cell functions.
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9 |
17616479
|
Recently, two isoforms of sphingomyelin synthase (SMS1 and SMS2), the last enzyme for SM de novo synthesis, have been cloned.
|
10 |
17616479
|
We have hypothesized that SMS1 and SMS2 are the two most likely candidates responsible for the SM levels in the cells and on the plasma membrane.
|
11 |
17616479
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To test this hypothesis, cultured cells were treated with tricyclodecan-9-yl-xanthogenate (D609), an inhibitor of SMS, or with SMS1 and SMS2 siRNAs.
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12 |
17616479
|
We measured cellular lipid levels, including SM, ceramide, phosphatidylcholine, and diacylglycerol and found that SMS1 and SMS2 siRNA treatment caused a significant decrease of SM levels (20% and 11%, respectively), compared to control siRNA treatment; SMS1 but not SMS2 siRNA treatment caused a significant increase of ceramide levels (10%).
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13 |
17616479
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There was a decreasing tendency for diacylglycerol levels after both SMS1 and SMS2 siRNA treatment, however, it was not statistical significant.
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14 |
17616479
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As shown by lipid rafts isolation and lipid determination, SMS1 and SMS2 siRNA treatment led to a decrease of SM content in detergent-resistant lipid rafts on the cell membrane.
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15 |
17616479
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Furthermore, SMS1 and SMS2 siRNA-treated cells had a stronger resistance than did control siRNA-treated cells to lysenin (a protein that causes cell lysis due to its affinity for plasma membrane SM).
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16 |
17616479
|
These results indicate that both SMS1 and SMS2 contribute to SM de novo synthesis and control SM levels in the cells and on the cell membrane including plasma membrane, implying an important relationship between SMS activity and cell functions.
|
17 |
17616479
|
Recently, two isoforms of sphingomyelin synthase (SMS1 and SMS2), the last enzyme for SM de novo synthesis, have been cloned.
|
18 |
17616479
|
We have hypothesized that SMS1 and SMS2 are the two most likely candidates responsible for the SM levels in the cells and on the plasma membrane.
|
19 |
17616479
|
To test this hypothesis, cultured cells were treated with tricyclodecan-9-yl-xanthogenate (D609), an inhibitor of SMS, or with SMS1 and SMS2 siRNAs.
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20 |
17616479
|
We measured cellular lipid levels, including SM, ceramide, phosphatidylcholine, and diacylglycerol and found that SMS1 and SMS2 siRNA treatment caused a significant decrease of SM levels (20% and 11%, respectively), compared to control siRNA treatment; SMS1 but not SMS2 siRNA treatment caused a significant increase of ceramide levels (10%).
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21 |
17616479
|
There was a decreasing tendency for diacylglycerol levels after both SMS1 and SMS2 siRNA treatment, however, it was not statistical significant.
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22 |
17616479
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As shown by lipid rafts isolation and lipid determination, SMS1 and SMS2 siRNA treatment led to a decrease of SM content in detergent-resistant lipid rafts on the cell membrane.
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23 |
17616479
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Furthermore, SMS1 and SMS2 siRNA-treated cells had a stronger resistance than did control siRNA-treated cells to lysenin (a protein that causes cell lysis due to its affinity for plasma membrane SM).
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24 |
17616479
|
These results indicate that both SMS1 and SMS2 contribute to SM de novo synthesis and control SM levels in the cells and on the cell membrane including plasma membrane, implying an important relationship between SMS activity and cell functions.
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25 |
17616479
|
Recently, two isoforms of sphingomyelin synthase (SMS1 and SMS2), the last enzyme for SM de novo synthesis, have been cloned.
|
26 |
17616479
|
We have hypothesized that SMS1 and SMS2 are the two most likely candidates responsible for the SM levels in the cells and on the plasma membrane.
|
27 |
17616479
|
To test this hypothesis, cultured cells were treated with tricyclodecan-9-yl-xanthogenate (D609), an inhibitor of SMS, or with SMS1 and SMS2 siRNAs.
|
28 |
17616479
|
We measured cellular lipid levels, including SM, ceramide, phosphatidylcholine, and diacylglycerol and found that SMS1 and SMS2 siRNA treatment caused a significant decrease of SM levels (20% and 11%, respectively), compared to control siRNA treatment; SMS1 but not SMS2 siRNA treatment caused a significant increase of ceramide levels (10%).
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29 |
17616479
|
There was a decreasing tendency for diacylglycerol levels after both SMS1 and SMS2 siRNA treatment, however, it was not statistical significant.
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30 |
17616479
|
As shown by lipid rafts isolation and lipid determination, SMS1 and SMS2 siRNA treatment led to a decrease of SM content in detergent-resistant lipid rafts on the cell membrane.
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31 |
17616479
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Furthermore, SMS1 and SMS2 siRNA-treated cells had a stronger resistance than did control siRNA-treated cells to lysenin (a protein that causes cell lysis due to its affinity for plasma membrane SM).
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32 |
17616479
|
These results indicate that both SMS1 and SMS2 contribute to SM de novo synthesis and control SM levels in the cells and on the cell membrane including plasma membrane, implying an important relationship between SMS activity and cell functions.
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33 |
17616479
|
Recently, two isoforms of sphingomyelin synthase (SMS1 and SMS2), the last enzyme for SM de novo synthesis, have been cloned.
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34 |
17616479
|
We have hypothesized that SMS1 and SMS2 are the two most likely candidates responsible for the SM levels in the cells and on the plasma membrane.
|
35 |
17616479
|
To test this hypothesis, cultured cells were treated with tricyclodecan-9-yl-xanthogenate (D609), an inhibitor of SMS, or with SMS1 and SMS2 siRNAs.
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36 |
17616479
|
We measured cellular lipid levels, including SM, ceramide, phosphatidylcholine, and diacylglycerol and found that SMS1 and SMS2 siRNA treatment caused a significant decrease of SM levels (20% and 11%, respectively), compared to control siRNA treatment; SMS1 but not SMS2 siRNA treatment caused a significant increase of ceramide levels (10%).
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37 |
17616479
|
There was a decreasing tendency for diacylglycerol levels after both SMS1 and SMS2 siRNA treatment, however, it was not statistical significant.
|
38 |
17616479
|
As shown by lipid rafts isolation and lipid determination, SMS1 and SMS2 siRNA treatment led to a decrease of SM content in detergent-resistant lipid rafts on the cell membrane.
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39 |
17616479
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Furthermore, SMS1 and SMS2 siRNA-treated cells had a stronger resistance than did control siRNA-treated cells to lysenin (a protein that causes cell lysis due to its affinity for plasma membrane SM).
|
40 |
17616479
|
These results indicate that both SMS1 and SMS2 contribute to SM de novo synthesis and control SM levels in the cells and on the cell membrane including plasma membrane, implying an important relationship between SMS activity and cell functions.
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41 |
17616479
|
Recently, two isoforms of sphingomyelin synthase (SMS1 and SMS2), the last enzyme for SM de novo synthesis, have been cloned.
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42 |
17616479
|
We have hypothesized that SMS1 and SMS2 are the two most likely candidates responsible for the SM levels in the cells and on the plasma membrane.
|
43 |
17616479
|
To test this hypothesis, cultured cells were treated with tricyclodecan-9-yl-xanthogenate (D609), an inhibitor of SMS, or with SMS1 and SMS2 siRNAs.
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44 |
17616479
|
We measured cellular lipid levels, including SM, ceramide, phosphatidylcholine, and diacylglycerol and found that SMS1 and SMS2 siRNA treatment caused a significant decrease of SM levels (20% and 11%, respectively), compared to control siRNA treatment; SMS1 but not SMS2 siRNA treatment caused a significant increase of ceramide levels (10%).
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45 |
17616479
|
There was a decreasing tendency for diacylglycerol levels after both SMS1 and SMS2 siRNA treatment, however, it was not statistical significant.
|
46 |
17616479
|
As shown by lipid rafts isolation and lipid determination, SMS1 and SMS2 siRNA treatment led to a decrease of SM content in detergent-resistant lipid rafts on the cell membrane.
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47 |
17616479
|
Furthermore, SMS1 and SMS2 siRNA-treated cells had a stronger resistance than did control siRNA-treated cells to lysenin (a protein that causes cell lysis due to its affinity for plasma membrane SM).
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48 |
17616479
|
These results indicate that both SMS1 and SMS2 contribute to SM de novo synthesis and control SM levels in the cells and on the cell membrane including plasma membrane, implying an important relationship between SMS activity and cell functions.
|
49 |
17616479
|
Recently, two isoforms of sphingomyelin synthase (SMS1 and SMS2), the last enzyme for SM de novo synthesis, have been cloned.
|
50 |
17616479
|
We have hypothesized that SMS1 and SMS2 are the two most likely candidates responsible for the SM levels in the cells and on the plasma membrane.
|
51 |
17616479
|
To test this hypothesis, cultured cells were treated with tricyclodecan-9-yl-xanthogenate (D609), an inhibitor of SMS, or with SMS1 and SMS2 siRNAs.
|
52 |
17616479
|
We measured cellular lipid levels, including SM, ceramide, phosphatidylcholine, and diacylglycerol and found that SMS1 and SMS2 siRNA treatment caused a significant decrease of SM levels (20% and 11%, respectively), compared to control siRNA treatment; SMS1 but not SMS2 siRNA treatment caused a significant increase of ceramide levels (10%).
|
53 |
17616479
|
There was a decreasing tendency for diacylglycerol levels after both SMS1 and SMS2 siRNA treatment, however, it was not statistical significant.
|
54 |
17616479
|
As shown by lipid rafts isolation and lipid determination, SMS1 and SMS2 siRNA treatment led to a decrease of SM content in detergent-resistant lipid rafts on the cell membrane.
|
55 |
17616479
|
Furthermore, SMS1 and SMS2 siRNA-treated cells had a stronger resistance than did control siRNA-treated cells to lysenin (a protein that causes cell lysis due to its affinity for plasma membrane SM).
|
56 |
17616479
|
These results indicate that both SMS1 and SMS2 contribute to SM de novo synthesis and control SM levels in the cells and on the cell membrane including plasma membrane, implying an important relationship between SMS activity and cell functions.
|
57 |
17616479
|
Recently, two isoforms of sphingomyelin synthase (SMS1 and SMS2), the last enzyme for SM de novo synthesis, have been cloned.
|
58 |
17616479
|
We have hypothesized that SMS1 and SMS2 are the two most likely candidates responsible for the SM levels in the cells and on the plasma membrane.
|
59 |
17616479
|
To test this hypothesis, cultured cells were treated with tricyclodecan-9-yl-xanthogenate (D609), an inhibitor of SMS, or with SMS1 and SMS2 siRNAs.
|
60 |
17616479
|
We measured cellular lipid levels, including SM, ceramide, phosphatidylcholine, and diacylglycerol and found that SMS1 and SMS2 siRNA treatment caused a significant decrease of SM levels (20% and 11%, respectively), compared to control siRNA treatment; SMS1 but not SMS2 siRNA treatment caused a significant increase of ceramide levels (10%).
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61 |
17616479
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There was a decreasing tendency for diacylglycerol levels after both SMS1 and SMS2 siRNA treatment, however, it was not statistical significant.
|
62 |
17616479
|
As shown by lipid rafts isolation and lipid determination, SMS1 and SMS2 siRNA treatment led to a decrease of SM content in detergent-resistant lipid rafts on the cell membrane.
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63 |
17616479
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Furthermore, SMS1 and SMS2 siRNA-treated cells had a stronger resistance than did control siRNA-treated cells to lysenin (a protein that causes cell lysis due to its affinity for plasma membrane SM).
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64 |
17616479
|
These results indicate that both SMS1 and SMS2 contribute to SM de novo synthesis and control SM levels in the cells and on the cell membrane including plasma membrane, implying an important relationship between SMS activity and cell functions.
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65 |
21669879
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In this study, we investigated the physiological function of sphingomyelin synthase 2 (SMS2) using SMS2 knock-out mice, and we found that SMS2 deficiency prevents high fat diet-induced obesity and insulin resistance.
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21669879
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Additionally, the siRNA of SMS2 decreased the accumulation of triglyceride in liver of leptin-deficient (ob/ob) mice, strongly suggesting that SMS2 is involved in lipid droplet formation.
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21669879
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Furthermore, we found that SMS2 exists in lipid microdomains and partially associates with the fatty acid transporter CD36/FAT and with caveolin 1, a scaffolding protein of caveolae.
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21669879
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Because CD36/FAT and caveolin 1 exist in lipid microdomains and are coordinately involved in lipid droplet formation, SMS2 is implicated in the modulation of the SM in lipid microdomains, resulting in the regulation of CD36/FAT and caveolae.
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21669879
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Here, we established new cell lines, in which we can completely distinguish SMS2 activity from SMS1 activity, and we demonstrated that SMS2 could convert ceramide produced in the outer leaflet of the plasma membrane into SM.
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70 |
21056967
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This screen led to the identification of many novel M3R-associated proteins, including the putative membrane protein transmembrane protein 147 (Tmem147).
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