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Objectives
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The Ambrose Monell Cryo Collection (AMCC) is independent of the five
AMNH research divisions, but as a central repository is connected to
all zoology departments. It is managed directly by the office of the
Associate Dean of Science for Collections.
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| Curatorial Responsibility |
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| The AMCC operates with Dr.
Darrel Frost as Associate Dean of Science for Collections. |
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| Deployment of staff support |
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Julie Feinstein is
the Collection Manager. She is responsible for the accuracy and
management of the AMCC database system. She oversees the lab's
curatorial assistants. She is responsible for the quality control of the specimen
accessions both physically (in the vats) and electronically (in the
database).
The AMCC has two full time curatorial assistants. The assistants work
directly with tissue samples as they come in, accessioning the samples
both physically (by transferring them in the appropriate container and
in the cryogenic vats) and electronically (by entering the samples
associated data in the AMCC database). Curatorial assistants always work in
pairs. They are also responsible for training interns throughout the
year. The AMCC has a flourishing internship program and already
has a large roster of intern "alumni" from Hunter College, REU, UMEB,
ACEND and the Museum's Inside View High School Internship Programs.
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Ambrose Monell Cryo Collection (AMCC) Facility Staff
Hierarchy
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Name
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Title
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Brief Job Description
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Immediate Supervisor
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Julie Feinstein
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Responsible for day-to-day curation of the collections and
oversees two curatorial assistants and interns. Responsible for the
accuracy and management of the AMCC database system.
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Dr. Darrel Frost (Associate Dean of Science for
Collections)
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Joann Mercedes
Miriam
Delarosa
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Accession samples both physically (by transferring them in
the vats and appropriate containers) and electronically (in
database). Each assistant is assigned an intern to work with
him/her.
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Julie Feinstein (Collection Manager)
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The mission of the Ambrose Monell Cryo Collection (AMCC) is to
provide an accessible repository of frozen tissue specimens, collected
and maintained under rigorously controlled conditions. In a time of
massive species loss, such efforts are essential in order to preserve
as comprehensive a record as possible of the earth's biodiversity.
The broad scope of the Monell Collection addresses an under-served
niche within the cryogenic biorepository community by attempting to
catalog all biodiversity at the molecular genetic level. The Monell
Collection is further distinguished from other repositories because it
exists within the framework of the American Museum of Natural History
(AMNH), where tissue samples can be referenced with documented
collecting events involving traditional voucher specimens and
associated data. Here, modern bioinformatics initiatives will
ultimately link collections with taxonomic determinations,
bibliographic citations, geospatial referencing information, genetic
data, digital images and photographs.
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| The AMNH Ambrose Monell collection (AMCC) began operations in May of
2001 (see Chang 2001). The Monell Collection provides uniform and high
quality storage of frozen tissue specimens under documented conditions.
The Monell Collection maintains specimens in an array of liquid nitrogen
cooled vats, at temperatures below -150°Celsius. The use of liquid
Nitrogen offers a variety of advantages, from stability in the face of
power interruptions, to achieving the extremely low temperatures
necessary for the successful long-term cryo-preservation of viable cells.
Tissue samples are indexed using a relational database application
(Freezerworks Unlimited® by Dataworks Development, Inc.) designed
specifically for freezer inventory management (Ioannou, 2000), which uses
barcodes to track specimens (as advocated by Monk, 1998). The computer
database tracks each bar-coded entry, in addition to over eighty
different data fields, including: the specimen's placement in the
collection (vat, section, rack, box, position), taxonomic identity
(including the person responsible for making this determination),
morphological voucher specimen catalog number (or zoo animal
identification number), tissue type and quantity, where and how the
specimen was collected and by whom, in addition to tracking GenBank
accession numbers and bibliographic references associated with a given
specimen. |
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The AMCC's frozen tissue collection supports a broad range of
comparative genetic and genomic research initiatives. We provide our
researchers with collecting kits to readily sample and ship genetic
material of high quality, enhancing on the potential information
content of each specimen. The Monell Collection supports ongoing
genetic research by insuring that all research materials are vouchered
(i.e. they point back to a specimen or a tissue sample and its derived
material in a curated collection, see below). This is a much-needed
service that the Museum extends to the entire scientific community,
under the guidance of an institutional policy (see also AMCC collection
Policies).
Scientists using the Monell Collection have access to legally
collected, authoritatively identified and properly documented specimens
for use in their research, complete with Museum accession numbers to
reference in their scholarly publications. In many cases, each tissue
specimen is linked through its catalog number to a morphological
voucher maintained in one of the traditional departmental collections.
However, many specimens are harvested from living animals (both captive
born and wild) and have only a tissue voucher, while still other
accessions simply consist of nucleic acid extracts. In each case, we
record as much information as possible to document the existence of the
sample, where and how it was collected and by whom, as well as how
taxonomic identification of the specimen was determined and by whom,
and what research has previously been conducted on the specimen.
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A fundamental role of the AMNH is building and maintaining
biological collections for documentation of biodiversity. Specimens
with detailed collection data generate a massive body of information on
distribution, seasonality, etc. Such permanently preserved reference
collections form a crucial component of the information transfer system
of biological diversity. These collections are essential for
identification, as vouchers for the application of names and for
vouchers of species used in research projects. Thus, responsible
scientists are in the habit of depositing voucher specimens of the
organisms they study in a natural history museum. This provides a
long-term record of their work as they must acknowledge all "specimens
examined" in their research publications. Furthermore, it hedges
against the changes in taxonomy that could alter the interpretation of
their results.
By archiving molecular biodiversity, we make unique and important
research materials available to the scientific community. It will allow
scientists, today and in the future, to take full advantage of advances
in molecular genetic and genomic technology. Ensuring that research
materials and their associated data are made widely available is an
ethical responsibility of scientific researchers that also facilitates
and supports good science. To that end, the Monell Collection offers a
searchable, on-line catalog of specimen holdings (See Database Page).
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| Going beyond simply preserving tissues, it is vital to provide a
context for molecular data. The genome of an organism contains a vast
amount of information, but this information is meaningless unless we
understand exactly how it relates to the organism as a whole. For this
reason, the on-line database supports digital image (eVoucher) archival,
providing a link between the tissue specimen and the identity of the
organism from which it was derived, in cases where collection of a
morphological voucher specimen is not possible. |
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Why a centralized biological repository?
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Tissue collections are proving to be an extremely valuable resource
to science. This is certainly true of the tissue collections at the
AMNH. Yet the long-term viability of this resource is in jeopardy.
While storing research materials in individual laboratories during
their use is an acceptable practice, it remains an uncontrolled and
potentially disastrous way of attempting to preserve valuable specimens
over the long term, as shown below.
As both the value and amount of the research material grows, it
becomes necessary to maintain it in a centrally managed repository with
institutional oversight where standard procedures can be applied, and
access and security better controlled. In this context, security means
protection against physical disappearance or loss of integrity of the
biological specimens through freezer failure, or loss of the
association between the physical material and the data that supports
it.
The urgency of storing all tissue collections in a centralized bio
repository, such as the AMCC, stems from the fact that most tissue
storage - at the AMNH and elsewhere - suffers from these
shortcomings:
1 - Inappropriate databasing and/or indexing in incompatible
databases
2 - Inappropriate organization, labeling, and storage leading to
various stages of data loss and tissue decomposition
3 - Storage in mechanical freezers without sufficient backup freezer
space in case of mechanical problems. Furthermore, most tissue archives
are not currently protected with alarm systems necessary to safeguard
them in the event of a freezer malfunction. Moreover, unlike the
systems at the AMCC, most mechanical freezers cannot sustain tissues in
the face of power interruptions as they lack emergency power
service.
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| Inappropriate label and data capturing |
Inappropriate container
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Inappropriate storage
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Example of a non-centralized frozen biological specimens storage
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The AMCC addresses all of these problems by:
1- Capturing all of the data in a standard database before they
become completely dissociated from the tissue specimens by surveying
original catalogs, field notes, voucher specimen tags and scanning
GenBank for accessions derived from the tissue specimens in question.
(See also AMCC Database)
2- Transferring all tissue specimens into standardized archival
storage tubes (Nunc Cryovials) and affix computer generated labels
designed for cryo-storage. The labels will show both barcoded and human
readable AMCC unique ID number as well as any other information
requested by the donor (see also AMCC Lab
Facilities: Dry Lab)
3- Alleviating the problems of storage capacities and freezer
failures by transferring the samples to stable, liquid Nitrogen charged
cryogenic freezers maintained in the Monell Collection. The facility
has ample backup storage space in case of freezer malfunction, however,
specimens must be contained in cryovials before they can be archived in
these freezers. The Monell facility uses sophisticated environmental
monitoring equipment to document storage conditions and these
monitoring programs include both local and remote electronic alarm
capabilities (see also AMCC Lab
Facilities: Cryostorage Room)
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Appropriate data capturing
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Appropriate labelling and containers
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Appropriate storage facilities
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The AMCC facilities
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Table: Individual laboratory storage vs. Centralized repository
Individual laboratory storage
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Centralized repository
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| No "gatekeeper" governing use or movement of specimens |
Collection Manager responsible for any event involving the
specimens |
| No environmental monitoring or security |
Environmental monitoring and security |
| No documentation of specimen thaws, specimen movement or
consumption |
Documentation of specimen thawing, specimen movement and
material quantity |
| No tracking system for samples |
Tracking of samples via bar coded labels |
| Diversity of databases, incompatible with each other |
Common database, allows widespread access in a standard
format |
| No audit trail |
Audit system tracking whom and when changes are made to the
database |
| Standard policies for deposit, withdrawal, access and inventory
control lacking |
Standard policies for deposit, withdrawal, access and inventory
control in place |
| Inadequate disaster recovery plans due to the perfusion of
collections |
Efficient disaster recovery due to the centralization of the
collections |
| Conservation of specimen in media such as Ethanol does not
prevent degradation of RNA, proteins or large DNA molecules |
Conservation of specimen tissues at ultra- low temperature LN2
storage preserves all molecular constituents and cell
viability. |
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We maintain specimens in an array of liquid nitrogen cooled
containers called cryovats. Tissue samples are indexed using a
relational database application called Freezerworks Unlimited® (by
Dataworks Development, Inc.) designed specifically for freezer
inventory management. The computer database tracks each bar-coded
entry, in addition to over eighty different data fields, including the
specimen's placement in the collection, taxonomic identity (including
the person responsible for making this determination), morphological
voucher specimen catalog number (or zoo animal identification number),
tissue type and quantity, where and how the specimen was collected and
by whom, in addition to tracking GenBank accession numbers and
bibliographic references associated with a given specimen. The use of
liquid Nitrogen cooled vats, which maintain temperatures
below-150º Celsius, offers a variety of advantages, from stability
in the face of power interruptions, to achieving the extremely low
temperatures necessary for the successful long-term cryo-preservation
of viable cells
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| Currently, AMNH tissue collections (that are not centrally archived
in the AMCC) are being stored at a range of temperatures and conditions,
from -20º to -80º Celsius. Unfortunately, specimens held at
-20º are subject to protein and lipid changes and damage from the
growth of microorganisms while specimens held at -80º are also
subject to protein and lipid changes, with extensive desiccation of
specimens being observed upon light microscopic examination of frozen
sections after only six months of storage . This degree of structural
change may also induce some types of molecular change. We advocate a
"colder is better" position on archiving tissues for future research.
This is especially true if the long-term use of a resource is
undefined. |
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