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== BioMicro Center News ==
== BioMicro Center News ==
=== APRIL 20, 2013 ===
=== APRIL 2017 ===
We have used the sunsetting of the [[BioMicroCenter:Neoprep|Illumina Neoprep]] as an opportunity to re-evaluate all of our library prep methodologies with an eye on significantly reducing library preparation costs. We’re now ready to roll out hand preparation for these methods as well as some of our automation to help smooth the transition. We plan to bring in scientists from the different manufacturers we’ve been looking at through our Technology Seminar Series to answer any questions you may have. For all of the methods, we will have a single sample price as well as a batch price that will be significantly cheaper per sample. Below are the RNAseq methods that are already locked in.
{|border="1"
|Method / Kit
|Per sample ||Per 24 ||Per 96 / 384
|-
|polyA RNA (>50ng):<BR>Kapa Hyperprep
|$150 ||$2,000 (est) ||NA
|-
|3’Digital Gene Expression
|NA ||$1,200 ||$4,000
|-
|Ribosomal Depletion (human/mouse):<BR>Kapa RiboGone
|$225 || TBD || TBD
|-
|Ribosomal Depletion (other):<BR>Illumina Ribozero + Kapa Hyperprep
|$250 || TBD || NA
|-
|Low input polyA:<BR>Clontech SMARTseq v4
|$300 || $1,600 || $2,500 / $5,000
|-
|Low input ribosomal depletion (human/mouse) <BR> Clontech ZapR kit
|$200 || TBD || TBD
|}
Please note that we do not consider this problem ‘solved’ and we are continuing to work on adapting new protocols with the aim of lowering cost while maintaining quality. We also are not yet complete with the process of getting everything listed in iLabs which will happen over the next couple weeks. The Neoprep will be shut down on July 31.<BR><BR>


We have noticed a number of technical issues with some Illumina runs. We want to share with you to make sure you are aware of some changes and newly identified technical issues with the platform and what we are doing to correct them where we can. All of these changes are from the Illumina side and none were especially well documented (some not at all). These issues are unlikely to be limited to the BMC, so samples from elsewhere on campus or around the country may also have these issues. Please read this as it may have some impact on your analyses.  <BR><BR>
A second area we continue to address is data storage. With recent expansions to the systems, we are able to significantly lower our data storage costs for next year. Active storage will now be $200/TB/y while archival storage (read only) will be at $100/TB/y.<BR><BR>


Just to begin, all of these changes are subtle and not obvious in most cases directly from the sequencers. It was the rare cases that had dramatic effects that caused us to notice them. If you decide you need to have samples rerun, we will work with you to try to get Illumina to replace the reagents and to get the samples rerun. Unfortunately, there is no way we can possibly do bulk reruns of several months’ worth of studies. <BR><BR>
Finally, many of you may have heard about a recent issue of “index switchng” or “pad swapping” on Illumina sequencers from a bioRxiv preprint from Stanford or social media (http://biorxiv.org/content/early/2017/04/09/125724). We have been well aware of this issue for many years and that it is endemic in all Illumina sequencers (we called it “barcode swapping” in house). Fortunately for us, the non-patterned flowcells (such as MiSeq, NextSeq and HiSeq2000) have a significantly lower issue with this than the newer instruments. Even so, the low level of index switching we have observed (~0.1% of reads for most runs) is a primary reason we have resisted mixing libraries from different labs on single sequencing lanes. If you have any questions/concerns about this instrument ‘feature’, we are happy to discuss it with you. Our hope is the new emphasis on this issue for the patterned flowcells will result in improved methodologies that further lower the likelihood of barcode swaps.  


The most concerning issue is a dropout of GC rich regions in clustering. This has been an on-again off-again issue with Illumina that we have addressed over a year ago by improvements in amplification cycling conditions and enzyme selection. Some time, several months ago (we do not have a precise window), Illumina appears to have changed the chemistry of one of their clustering components and that caused a major change in performance on GC rich areas. This can be seen as an absence of reads from very GC rich areas but, because these areas are rare in most genomes, they cannot be seen on the flowcell wide metrics. This issue is found on current HiSeq and MiSeqV2 kits but not on MiSeqV1 kits nor, we suspect, on the GAII. We have been able to address this problem by adding a brief boiling step during NaOH denaturation of the samples and have implemented this as SOP starting about two weeks ago. This drop out of regions can cause significant issues for several studies – most notably ChIP analyses – when you are comparing data from different chemistries. <BR><BR>
=== JANUARY 2017 ===
BMC is officially moving almost all of our sample intake to [https://mit.ilabsolutions.com iLabs]. We have spent the past several months moving the forms for Illumina library prep, sequencing and Pacbio sequencing over to the new system and testing it out - thank you to the labs that helped us with our beta testing! You can find BMC in iLabs at https://mit.ilabsolutions.com/ in the KI Genomics Core / MIT BioMicro Center section. The new forms are under "Request Services". All projects using MIT cost objects should use iLabs going forward. Projects being billed to outside groups or by PO should continue to use the forms on the website.<BR><BR>


A second concern is one that has been reported in the community but we have not identified on our machines – yet – where samples from a run are being observed in the following run as minor contaminants. This issue is limited to the MiSeq and HiSeq2500 (we do not have the latter) where the tubes that add sample to the flowcell are not changed. This contamination is reported to be <1% and so would not show up on our quality metrics. However, if your MiSeq analyses are being based on finding a few reads in a large pool of discarded data or you are doing a number of sequential runs, you may wish to validate your data more carefully using an alternative technique such as qPCR or sanger sequencing. There is currently no technical fix to this problem. <BR><BR>
The [[BioMicroCenter:Covaris|Covaris E220]] is now up and running. We will be having a [[BioMicroCenter:Technology_Seminar_Series|seminar for it on January 11th]] (details TBA). Our Covaris rep will be on hand that day to help you set up your protocols as well. Please let Jon or myself know if you would like to schedule time. There is no charge for this retraining. <BR><BR>


A third issue has been around for a while though we had not appreciated the implications. Illumina’s newer versions of basecalling software have become less capable of handling uniform sequence (all A’s for example). In earlier versions, only 5 basepairs of variability were needed and intensities could be determined by the control lane we run on all HiSeq flowcells. Now, it appears that nt 1-25 all must have representation of all 4 bases at all positions, even with a control lane. This has always been an issue on the MISeq and we have solved it by spiking in 30%PhiX in the lane (as opposed to our normal 0.1% spike in). Similar solutions can be used on the HiSeq. Given this change, we are re-evaluating whether there is value in using the 8th lane as a control. The latest version of MiSeq software (only a couple days old) supposedly allows us to lower the fraction to 5%, but how successful this is remains to be seen. Base rearrangement with the GAII allows the GAII to avoid this issue.  <BR><BR>
The price for SYBR green is decreasing significantly to $25/ml. In the fall, we compared a number of new providers based on their ability to quantify Illumina libraries. Of the two we tested, one preformed as well as KAPA (the other did not). KAPA, in turn, was able to lower the cost of their SYBR significantly which we prefer as it will maintain consistency. Due to the lower cost, we are also removing the pooling charges from Illumina sequencing - those costs are being absorbed into the QC costs instead. The Roche SYBR did not match this lower cost and we will be discontinuing our bulk purchases of it.<BR><BR>
 
Finally, it appears that custom priming on the MiSeq is not the same as custom priming on the HiSeq and GAII. It can still be done, but the Tm requirement is much higher. Primers that work on the HiSeq may fail on the MiSeq. As long as your Tm matches or exceeds the Tm used for Illumina primers, the MiSeq should work, but the MiSeq’s different chemistry (formamide instead of heat denaturation) is less forgiving.  <BR><BR>
 
In summary, we have a number of technical challenges that may (or may not) effect you and we want to make sure you have all the information we can give you. I want to thank the researchers and labs that have been very patient as we have struggled running their samples which led us to identify these problems. If you believe these issues have effected your data, please do not hesitate to contact me and we can discuss how to move forward.  <BR><BR>
 
 
=== MARCH 11, 2013 ===
Quick update from BioMicro: <BR><BR>
The [[BioMicroCenter:Wafergen|Wafergen qPCR system]] is now operational. We have done a couple pilot experiments so far and it does seem to work, if there are a few more limitations than we anticipated. We are working with Wafergen to see how many of these can be alleviated but you are more than welcome to try it out and see if it would be useful to you. They have given us quite competitive pricing that is a lot lower than the cost for the [[BioMicroCenter:Fluidigm|Fluidigm BioMark]] . Please email us if you are interested in training.
 
 
 
=== JANUARY 9, 2013 ===
Happy new years to everyone. A couple new things happening in BioMicro that we want to make everyone aware of. <BR><BR>
First, this month begins a year long experiment in joining the BioMicro Center Informatics team and the KI Bioinformatics and Computing Core in to a single team. Our two teams have been collaborating for several years, sharing computational infrastructure, etc. but this year we will be formalizing and expanding the relationship with the goal of creating a more efficient unified core. Informatics analysis requests should still be sent to Charlie Whittaker or to myself as usual, but will be spread across the joint team based on expertise and on availability. You are also, as always, welcome to contact any of the informatics scientists directly. We hope this will allow us to reduce waiting times and to keep costs under control.  <BR><BR>
During the trial period (and hopefully going forward), pricing for informatics will be available in two flavors. First, for projects needing routine work, the subsidized rate will be $70/h for all CORE members (Biology, BE, KI, CEHS). For more involved projects, we have second option to purchase a “share” of the informatics team. This is an annual commitment for a fraction of an informaticist and will cost $960/mo for an average of 4h/week of informatics support. The monthly usage levels do not have to be exact and can be used in large blocks. The hours in the share can be used with any member of the team and the informaticist can vary from project to project. <BR><BR>
Finally, and importantly, we will be changing the way we are storing Illumina sequencing data long term. In the past, we have saved the fastq, sam and bam files, along with the quality control data, in a zipped file. These zipped files now occupy over 50TB of storage which is limiting  how we are able to handle new sequencing runs. To address this, we will be deleting the fastq and sam files from the archive and storing only the binary bam and quality control files. The fastq and sam files can be regenerated rapidly from the bam files using Picard and SamTools (though reads may not be in the same order). As always, we strongly encourage you to keep your own copy of the Illumina data and use our version only as a backup. We will begin this conversion next week.
If you have any concerns, please do not hesitate to contact me.


Finally, we are introducing a significantly cheaper library prep for [[BioMicroCenter:DNA_HTL|very high-throughput experiments]]. We have been collaborating closely with [http://ttplabtech.com/liquid-handling/mosquito_hv/ TTP Labtech to adapt their Mosquito] liquid handler for core facility settings. Our first method is NexteraXT. Using the Mosquito, we have been able to reduce the reaction volume by an order of magnitude. A 96 well plate will cost <$15/sample and a 384 well plate is under $7.50/sample. These new methods are ideally suited for single cell and amplicon work but are NOT well suited for de novo assembly as the library complexity is lower due to the lower amount of input DNA. TTP will be giving the [[BioMicroCenter:Technology_Seminar_Series|seminar in February]].




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== ABOUT THE BIOMICRO CENTER ==
== ABOUT THE BIOMICRO CENTER ==


The MIT BioMicro Center was founded in 2000 as the core bio-fabrication and microarray processing facility at MIT. The Center is a joint endeavor between the [http://biology.mit.edu Department of Biology], the [http://ki.mit.edu Koch Institute for Integrative Cancer Research], the [http://be.mit.edu Department of Biological Engineering] and the [http://cehs.mit.edu MIT Center for Environmental Health Sciences.] The BioMicro Center offers a wide range of genomic services to researchers at MIT. The majority of services rendered pertain to massively parallel sequencing using the Illumina Genome Analyzer (both library preparation and sequencing). Commercial array processing and include both the Affymetrix Gene Chip and Agilent DNA array platforms continues to be a significant portion of our portfolio. Real-time PCR and Agilent BioAnalyzer services are available in the facility both as services available to researchers, as well as for quality control of microarray and sequencing samples. In addition, the Center has a presence in high-throughput screening with robotics and plate reading as well as informatics and computational support. The BioMicro Center serves the [http://ki.mit.edu Koch Institute] as the [http://ki.mit.edu/sbc/microarray MicroArray Technologies Core] and as part of the [http://ki.mit.edu/sbc/bioinformatics Bioinformatics and Computing Core] and the [http://cehs.mit.edu MIT Center for Environmental Health Sciences] as part of the [http://cehs.mit.edu/facilities.html#Genomics_and_Bioinformatics_Core Genomics and Imaging Core]<BR><BR>
The MIT BioMicro Center was founded in 2000 as the core bio-fabrication and microarray processing facility at MIT. The Center is a joint endeavor between the [http://biology.mit.edu Department of Biology], the [http://ki.mit.edu Koch Institute for Integrative Cancer Research], the [http://be.mit.edu Department of Biological Engineering] and the [http://cehs.mit.edu MIT Center for Environmental Health Sciences.] The BioMicro Center offers a wide range of genomic services to researchers at MIT. The majority of services rendered pertain to massively parallel sequencing using the Illumina platform (both library preparation and sequencing). Commercial array processing and include both the Affymetrix Gene Chip and Agilent DNA array platforms are also part of our portfolio. Real-time PCR and Agilent BioAnalyzer services are available in the facility both as services available to researchers, as well as for quality control of microarray and sequencing samples. In addition, the Center has a presence in high-throughput screening with robotics and plate reading as well as informatics and computational support. The BioMicro Center serves the [http://ki.mit.edu Koch Institute] as the [http://ki.mit.edu/sbc/microarray MicroArray Technologies Core] and as part of the [http://ki.mit.edu/sbc/bioinformatics Bioinformatics and Computing Core] and the [http://cehs.mit.edu MIT Center for Environmental Health Sciences] as part of the [http://cehs.mit.edu/facilities.html#Genomics_and_Bioinformatics_Core Genomics and Imaging Core]<BR><BR>


Experimental and analytical work done in the BioMicro Center is funded by the NIH and must be made available through the NIH's open access policy. All Koch Institute and CEHS labs '''must''' acknowledge their core grants for work done in the core with the following language.  
Experimental and analytical work done in the BioMicro Center is funded by the NIH and must be made available through the NIH's open access policy. All Koch Institute and CEHS labs '''must''' acknowledge their core grants for work done in the core with the following language.  
* KI ''"This work was funded by the National Cancer Institute of the NIH under award P30-CA14051"''  
* KI ''"This work was funded by the National Cancer Institute of the NIH under award P30-CA14051"''  
* CEHS ''"This work was funded by the National Institute of Environmental Health Sciences of the NIH under award P30-ES002109"''
* [[BioMicroCenter:CEHS13|CEHS]] ''"This work was funded by the National Institute of Environmental Health Sciences of the NIH under award P30-ES002109"''


== PUBLICATIONS ==
== PUBLICATIONS ==
Please note the publication aspect of OWW is not working. This section is disabled.
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== PREVIOUS NEWSLETTERS ==
== PREVIOUS NEWSLETTERS ==
 
'''[[BioMicroCenter:News2015|2015]]'''<BR>
'''[[BioMicroCenter:News2014|2014]]'''<BR>
'''[[BioMicroCenter:News2013|2013]]'''<BR>
'''[[BioMicroCenter:News2012|2012]]'''<BR>
'''[[BioMicroCenter:News2012|2012]]'''<BR>
'''[[BioMicroCenter:News2011|2011]]'''<BR>
'''[[BioMicroCenter:News2011|2011]]'''<BR>

Revision as of 12:34, 26 April 2017

HOME -- SEQUENCING -- LIBRARY PREP -- HIGH-THROUGHPUT -- COMPUTING -- OTHER TECHNOLOGY

.

Welcome to the MIT BIOMICRO CENTER

BioMicro Center News

APRIL 2017

We have used the sunsetting of the Illumina Neoprep as an opportunity to re-evaluate all of our library prep methodologies with an eye on significantly reducing library preparation costs. We’re now ready to roll out hand preparation for these methods as well as some of our automation to help smooth the transition. We plan to bring in scientists from the different manufacturers we’ve been looking at through our Technology Seminar Series to answer any questions you may have. For all of the methods, we will have a single sample price as well as a batch price that will be significantly cheaper per sample. Below are the RNAseq methods that are already locked in.

Method / Kit Per sample Per 24 Per 96 / 384
polyA RNA (>50ng):
Kapa Hyperprep 		$150 $2,000 (est) NA
3’Digital Gene Expression NA $1,200 $4,000
Ribosomal Depletion (human/mouse):
Kapa RiboGone 		$225 TBD TBD
Ribosomal Depletion (other):
Illumina Ribozero + Kapa Hyperprep 		$250 TBD NA
Low input polyA:
Clontech SMARTseq v4 		$300 $1,600 $2,500 / $5,000
Low input ribosomal depletion (human/mouse)
Clontech ZapR kit 		$200 TBD TBD

Please note that we do not consider this problem ‘solved’ and we are continuing to work on adapting new protocols with the aim of lowering cost while maintaining quality. We also are not yet complete with the process of getting everything listed in iLabs which will happen over the next couple weeks. The Neoprep will be shut down on July 31.

A second area we continue to address is data storage. With recent expansions to the systems, we are able to significantly lower our data storage costs for next year. Active storage will now be $200/TB/y while archival storage (read only) will be at $100/TB/y.

Finally, many of you may have heard about a recent issue of “index switchng” or “pad swapping” on Illumina sequencers from a bioRxiv preprint from Stanford or social media (http://biorxiv.org/content/early/2017/04/09/125724). We have been well aware of this issue for many years and that it is endemic in all Illumina sequencers (we called it “barcode swapping” in house). Fortunately for us, the non-patterned flowcells (such as MiSeq, NextSeq and HiSeq2000) have a significantly lower issue with this than the newer instruments. Even so, the low level of index switching we have observed (~0.1% of reads for most runs) is a primary reason we have resisted mixing libraries from different labs on single sequencing lanes. If you have any questions/concerns about this instrument ‘feature’, we are happy to discuss it with you. Our hope is the new emphasis on this issue for the patterned flowcells will result in improved methodologies that further lower the likelihood of barcode swaps.

JANUARY 2017

BMC is officially moving almost all of our sample intake to iLabs. We have spent the past several months moving the forms for Illumina library prep, sequencing and Pacbio sequencing over to the new system and testing it out - thank you to the labs that helped us with our beta testing! You can find BMC in iLabs at https://mit.ilabsolutions.com/ in the KI Genomics Core / MIT BioMicro Center section. The new forms are under "Request Services". All projects using MIT cost objects should use iLabs going forward. Projects being billed to outside groups or by PO should continue to use the forms on the website.

The Covaris E220 is now up and running. We will be having a seminar for it on January 11th (details TBA). Our Covaris rep will be on hand that day to help you set up your protocols as well. Please let Jon or myself know if you would like to schedule time. There is no charge for this retraining.

The price for SYBR green is decreasing significantly to $25/ml. In the fall, we compared a number of new providers based on their ability to quantify Illumina libraries. Of the two we tested, one preformed as well as KAPA (the other did not). KAPA, in turn, was able to lower the cost of their SYBR significantly which we prefer as it will maintain consistency. Due to the lower cost, we are also removing the pooling charges from Illumina sequencing - those costs are being absorbed into the QC costs instead. The Roche SYBR did not match this lower cost and we will be discontinuing our bulk purchases of it.

Finally, we are introducing a significantly cheaper library prep for very high-throughput experiments. We have been collaborating closely with TTP Labtech to adapt their Mosquito liquid handler for core facility settings. Our first method is NexteraXT. Using the Mosquito, we have been able to reduce the reaction volume by an order of magnitude. A 96 well plate will cost <$15/sample and a 384 well plate is under $7.50/sample. These new methods are ideally suited for single cell and amplicon work but are NOT well suited for de novo assembly as the library complexity is lower due to the lower amount of input DNA. TTP will be giving the seminar in February.


ABOUT THE BIOMICRO CENTER

The MIT BioMicro Center was founded in 2000 as the core bio-fabrication and microarray processing facility at MIT. The Center is a joint endeavor between the Department of Biology, the Koch Institute for Integrative Cancer Research, the Department of Biological Engineering and the MIT Center for Environmental Health Sciences. The BioMicro Center offers a wide range of genomic services to researchers at MIT. The majority of services rendered pertain to massively parallel sequencing using the Illumina platform (both library preparation and sequencing). Commercial array processing and include both the Affymetrix Gene Chip and Agilent DNA array platforms are also part of our portfolio. Real-time PCR and Agilent BioAnalyzer services are available in the facility both as services available to researchers, as well as for quality control of microarray and sequencing samples. In addition, the Center has a presence in high-throughput screening with robotics and plate reading as well as informatics and computational support. The BioMicro Center serves the Koch Institute as the MicroArray Technologies Core and as part of the Bioinformatics and Computing Core and the MIT Center for Environmental Health Sciences as part of the Genomics and Imaging Core

Experimental and analytical work done in the BioMicro Center is funded by the NIH and must be made available through the NIH's open access policy. All Koch Institute and CEHS labs must acknowledge their core grants for work done in the core with the following language.

  • KI "This work was funded by the National Cancer Institute of the NIH under award P30-CA14051"
  • CEHS "This work was funded by the National Institute of Environmental Health Sciences of the NIH under award P30-ES002109"

PUBLICATIONS

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PREVIOUS NEWSLETTERS

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16 April 2024

      10:20  Yarn Microfluidics - Roger Dirth‎‎ 12 changes history +442‎ [Rcostello‎ (12×)]
     
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     08:18  3D Printed Microfluidic Robots - Helen Hua‎‎ 2 changes history +6‎ [Michele Caggioni‎ (2×)]
     
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15 April 2024

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     18:16  Multilayer Paper Microfluidics - Madyson Redder‎‎ 15 changes history +4,948‎ [Mredder‎ (15×)]
     
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