Abstract：
:Asian (Elephas maximus) and African (Loxodonta africana) elephants serve as important keystone, umbrella and flagship species. Despite that, population numbers are declining, due mainly to poaching and habitat destruction. Understanding reproductive mechanisms is vital to effective management, particularly insurance populations in captivity, and to that end, long-term biological databases are key to understanding how intrinsic and extrinsic factors affect reproductive function at individual and population levels. Through decades of hormonal and ultrasonographic monitoring, many unique aspects of zoo elephant reproduction have been identified, including differences in luteal steroidogenic activity, follicular maturation, pituitary gonadotropin secretion, fetal development and reproductive tract anatomy. Reproductive problems also hamper captive propagation efforts, particularly those related to abnormal or lack of ovarian cyclicity. Recent large-scale, multi-institutional studies and use of epidemiological approaches have identified factors important for good welfare and reproduction, which include enrichment, feeding diversity, good elephant-keeper relations, social compatibility, exercise, and not being obese. There are notable differences in reproductive mechanisms between Asian and African elephants, as well as the factors that influence reproduction and welfare, suggesting species-targeted management approaches are needed to maximize fitness. In the first edition, we discussed reproductive function in male and female elephants. Since then, a number of significant advances have been made primarily in female elephants, which will be the focus of this updated review.
journal_name
Adv Exp Med Bioljournal_title
Advances in experimental medicine and biologyauthors
Brown JLdoi
10.1007/978-3-030-23633-5_9subject
Has Abstractpub_date
2019-01-01 00:00:00pages
243-273eissn
0065-2598issn
2214-8019journal_volume
1200pub_type
杂志文章,评审abstract：:Genotoxic chemicals are known to react with DNA either directly or after metabolic activation to form adducts, a step thought to be relevant with respect to chemical carcinogenesis. Evaluation of cancer risk due to exposure to chemicals requires information about the internal dose which depends on individual variation...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4757-3230-6_20
更新日期：1999-01-01 00:00:00
abstract：:In summary, NO is capable of decreasing mitochondrial respiration in a variety of mammalian tissues. This effect is mediated primarily via binding of NO to the O2 binding site of cytochrome oxidase. This highly sensitive interaction presumably reflects a remnant homology between cytochrome oxidase and bacterial nitrat...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4615-4717-4_46
更新日期：1999-01-01 00:00:00
abstract：:Electrical Impedance Tomography (EIT) is a promising application that displays changes in conductivity within a body. The basic principle of the method is the repeated measurement of surface voltages of a body, which are a result of rolling injection of known and small-volume sinusoidal AC current to the body through ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-3-319-57348-9_9
更新日期：2017-01-01 00:00:00
abstract：:Aquaporins (AQPs) were discovered as channels facilitatingwater movement across cellular membranes. Whereas much of the research has focused on characterizing AQPs with respect to cell water homeostasis, recent discoveries in terms of the transport selectivity of AQP homologs has shed new light on their physiological ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4419-6315-4_1
更新日期：2010-01-01 00:00:00
abstract：:The brain is sensitive to the inflammation and oxidative stress that can cause the aging or neurodegenerative diseases. We investigated the anti-neuroinflammatory activities of taurine chloramine (TauCl) on lipopolysaccharide (LPS)-treated mouse BV2 microglia mediated through heme oxygenase (HO)-1 expression. TauCl in...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-94-024-1079-2_12
更新日期：2017-01-01 00:00:00
abstract：:Acute ethanol loading in the rat induces hypocalcemia and hypermagnesemia. In addition, hypocalcemia is not corrected by exogenous PTH. In the rat the mechanism of these changes was investigated by measuring plasma immunoreactive parathyroid hormone (PTH). PTH was also measured in culture medium in which parathyroid g...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4615-9167-2_54
更新日期：1980-01-01 00:00:00
abstract：:After an RNA is transcribed, it undergoes a variety of processing steps that can change the encoded protein sequence (through alternative splicing and RNA editing), regulate the stability of the RNA, and control subcellular localization, timing, and rate of translation. The recent explosion in genomics techniques has ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-3-319-29073-7_1
更新日期：2016-01-01 00:00:00
abstract：:Lead (Pb2+) is a developmental neurotoxicant that causes lifelong cognitive dysfunctions. In particular, Pb2+-induced frontoexecutive dysfunctions emerge later in life when the cortex is fully myelinated, thereby permitting the ability to assess the extent to which Pb2+ has developmentally impacted higher order cognit...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-981-13-8023-5_70
更新日期：2019-01-01 00:00:00
abstract：:While clinical guidelines clearly define mechanisms for asthma diagnosis based upon history, lung function testing, symptoms, and physical examination, surveillance for asthma is much less straightforward. Epidemiologists have long debated the best means of assessing the scope and burden of asthma, seeking to reduce t...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4614-8603-9_2
更新日期：2014-01-01 00:00:00
abstract：:The interaction between two neuropeptides, VIP and TRH, was studied. The TRH receptor binding ability was examined using intact GH3 cells and its membrane fraction. The TRH binding ability decreased when intact cells were preincubated with VIP, forskolin or db-cAMP, but not when the membrane fraction was treated with ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4757-5971-6_10
更新日期：1988-01-01 00:00:00
abstract：:Islet transplantation is emerging as a viable treatment option for selected patients with type 1 diabetes. Following the initial report in 2000 from Edmonton of insulin independence in seven out of seven consecutive recipients, there has been a huge expansion in clinical islet transplantation. The challenge we now fac...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-90-481-3271-3_30
更新日期：2010-01-01 00:00:00
abstract：:Antigen 43 (Ag43) is a prominent hetero-oligomeric protein complex in the outer membrane of Escherichia coli. It is composed of two subunits. alpha 43 (M(r) 60, 000) and beta 43 (M(r) 53, 000) in 1:1 stoichiometry. alpha 43 is surface expressed, extends beyond the O-side chains of smooth lipopolysaccharide and is boun...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4899-1828-4_56
更新日期：1997-01-01 00:00:00
abstract：:Macromolecular crystallography has been central to the emergence and development of structural biology as a scientific discipline. Approximately 90% of the more than 138,000 three-dimensional structures currently available in the Protein Data Bank (PDB) archive, the single, global open access data resource for macromo...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-981-13-2200-6_2
更新日期：2018-01-01 00:00:00
abstract：:Recent studies suggested that colorectal cancer influences the types and quantity of nucleic acids - especially microRNAs - detected in the bloodstream. Concentration of circulating (cell-free) microRNAs, and possibly of other non-coding RNAs, could therefore serve as valuable colorectal cancer biomarker and could del...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-3-319-42059-2_9
更新日期：2016-01-01 00:00:00
abstract：:Renewal of rod photoreceptor outer segments in the mammalian eye involves synchronized diurnal shedding after light onset of spent distal outer segment fragments (POS) linked to swift clearance of shed POS from the subretinal space by the adjacent retinal pigment epithelium (RPE). Engulfed POS phagosomes in RPE cells ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-3-319-17121-0_95
更新日期：2016-01-01 00:00:00
abstract：:There are two alternative approaches to ultrasound-assisted drug delivery. First, the drug can be entrapped into or attached onto the ultrasound-responsive particles and administered in the vasculature, to achieve ultrasound-triggered drug release from the particles and localized tissue deposition in response to ultra...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-3-319-22536-4_12
更新日期：2016-01-01 00:00:00
abstract：:This chapter provides an overview of diet-gene interaction and the role of dietary factors in human health and disease. Human master control genes that regulate processes of fundamental importance, such as cell proliferation and the immune response, are introduced and their modulation by nutraceuticals, produced by pl...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4419-7347-4_2
更新日期：2010-01-01 00:00:00
abstract：:Exosomes are 60 to 90 nm membrane vesicles originating from late endosomes and secreted from most hematopoietic and epithelial cells in vitro. B cell derived-exosome antigenicity was first reported in 1996 in MHC class II restricted CD4+ T lymphocytes. In 1998, we reported that dendritic cell derived-exosomes are immu...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4615-0081-0_17
更新日期：2003-01-01 00:00:00
abstract：:Traumatic injury of the spinal cord leads to devastating conditions that affect ~2.5 million people worldwide. This is because the mammalian spinal cord reacts to injury with only limited endogenous repair. Functional restoration requires the replacement of lost cells, the growth and navigation of regenerating axons o...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-3-319-62817-2_13
更新日期：2017-01-01 00:00:00
abstract：:A high frequency of recombination has been shown to occur during replication of the coronavirus mouse hepatitis virus (MHV) in vitro as well as in vivo. Although sequencing of field strains of coronavirus infectious bronchitis virus (IBV) has indicated that IBV strains also undergo recombination, there has been no exp...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4615-1899-0_88
更新日期：1995-01-01 00:00:00
abstract：:Molecular chaperones promote the correct folding of proteins in aggregation-prone cellular environments by stabilizing nascent polypeptide chains and providing appropriate folding conditions. Prefoldins (PFDs) are molecular chaperones found in archaea and eukaryotes, generally characterized by a unique jellyfish-like ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-3-030-00737-9_2
更新日期：2018-01-01 00:00:00
abstract：:Lactoferrin promoter and the 5'-flanking region of both human and mouse were isolated from a genomic library constructed with lambda phage. A 2.0 kbp Sac I fragment of the human clone (HLF031a.30) and a 3.0 kbp Eco R I/Hinc II fragment of the mouse clone (mL14p9E) containing the lactoferrin promoter, 5'-flanking regio...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4615-2548-6_18
更新日期：1994-01-01 00:00:00
abstract：:Optical label-free porous Si-based biosensors for rapid bacteria detection are introduced. The biosensors are designed to directly capture the target bacteria cells onto their surface with no prior sample processing (such as cell lysis). Two types of nanostructured optical transducers based on oxidized porous Si (PSiO...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-94-007-2555-3_4
更新日期：2012-01-01 00:00:00
abstract：:Recently lightguide spectrophotometry (LGS) has been investigated for assessing bowel mucosal oxygenation and may prove helpful in the diagnosis of bowel ischaemia. This pilot study explores the use of LGS and laser Doppler flowmetry (LDF) to measure SO2 and perfusion in the bowel during key stages of colon surgery. S...
journal_title：Advances in experimental medicine and biology
pub_type： 临床试验,杂志文章
doi：10.1007/978-0-387-85998-9_39
更新日期：2009-01-01 00:00:00
abstract：:Slit guidance ligands (Slits) and their roundabout (Robo) family of receptors are well-known axon guidance molecules that were originally identified in Drosophila mutants with commissural axon pathfinding defects. However, Slit-Robo signaling has been shown to be involved in not only neurogenesis, but also the develop...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/5584_2020_586
更新日期：2020-09-29 00:00:00
abstract：:Addiction is marked by repeating a certain behavior while ignoring the potential physical or mental consequences. Non-substance addiction provides an ideal model for researching the emergence and development of addiction's basic mechanism. Comparative studies of substance and non-substance addiction are helpful to rev...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-981-10-5562-1_6
更新日期：2017-01-01 00:00:00
abstract：:Homeostasis is the process by which cells adapt to stress and prevent or repair injury. Unique programs have evolved to sense and activate these homeostatic mechanisms and as such, homeostatic sensors may be potent therapeutic targets. The hypoxic response mediated by hypoxia inducible factor (HIF) downstream of oxyge...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4899-7678-9_16
更新日期：2016-01-01 00:00:00
abstract：:Inhalation of high concentrations of zinc oxide (ZnO) particles may cause metal fume fever. A useful tool to characterize the reactivity of innate immune cells of an individual, e.g., after in vivo exposure, is the whole blood assay (WBA). The measurable outcome of WBA is the release of cytokines, especially pro-infla...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/5584_2019_471
更新日期：2020-01-01 00:00:00
abstract：:Stable isotope labeling by amino acids in cell culture (SILAC) is a powerful approach for high-throughput quantitative proteomics. SILAC allows highly accurate protein quantitation through metabolic encoding of whole cell proteomes using stable isotope labeled amino acids. Since its introduction in 2002, SILAC has bec...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-3-319-06068-2_5
更新日期：2014-01-01 00:00:00
abstract：:Substrate/inhibitor specificities of nucleoside analogues with modified sugar moieties toward highly purified deoxycytidine kinase (dCK) and thymidine kinases (TK1 and TK2) from human leukemic spleen have been examined. Substrate activities of cytosine nucleosides vs dCK were as follows: 2'-fluoro-dC > 2'-O-methyl-C >...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4615-5381-6_120
更新日期：1998-01-01 00:00:00
