Presentation on theme: "BIOMARKER DAN BIOINDIKATOR BAHAN KULIAH ANALISIS PENCEMARAN."— Presentation transcript:
BIOMARKER DAN BIOINDIKATOR BAHAN KULIAH ANALISIS PENCEMARAN
1.Monitoring Monitoring must take into consideration the type or types of contaminants present (biological and chemical), their availability and the possibility of biomagnification and bioaccumulation. The environmental monitoring must be able to detect with accuracy and consistency pollutants present at very low levels.
2.Biomarkers, Test organisms and Bioindicators, The effects of pollutants on whole organisms representative of the environment, known as bioindicators. The effects of pollutants on physiological, biochemical, and molecular characteristics of organisms in the environment, known as biomarkers. The effect of the pollutant on test organisms in the laboratory.
Bioindicators and biomarkers have the advantage that they measure the action of the pollutants in the real and complex environment where there may be many and complex interactions at sublethal levels.
BioMarker Definition : Biomarker is a substance used as an indicator of a biologic state Existence of living organisms or biological process. A particular disease state A fragment of DNA sequenceDNA sequence Proteins Nucleic acids Carbohydrate Lipids Small molecules
Biomarkers Location of the biomarker : Thymidylate synthase (TS) nucleus vs the cytoplasm The higher the level in NE, lower level in the cyto. Lower survival in colorectal cancer patients Galectin-3 Cellular-subcellular locations Tissue or organ locations Location of a particular molecule can also be a marker Blood Galectin-3 Predict the outcomes for patients with symptoms of heart failure Galectin-3 is a member of lectin family. It is wildly distributed In tissue of epithelial, fibroblast, and dendritic cells.
Biomarker Detection of biomarker Quantitative a link between quantity of the marker and disease Qualitative a link between exist of a marker and disease Detection of biomarker – diagnosis Self properties, e.g enzymatic activities Antibodies, IHC, ELISA
Biomarker & Diagnosis Ideal Marker for diagnosis Should have great sensitivity, specificity, and accuracy in reflecting total disease burden. A tumor marker should also be prognostic of outcome and predictive of tumor recurrence and effectiveness of anti-cancer treatments. Biomarker for Screening The marker must be highly specific, minimize false positive and negative The marker must be easily detected without complicated medical procedures. The disease markers released to serum and urine are good targets for application of early screening. The method for screening should be cost effective. The marker must be able to clearly reflect the early stage of disease Samples for biomarker detection Blood, urine, or other body fluids samples Tissue samples
A.BIOMARKERS Biomarkers can be defined as quantitative measures of changes in the biological system in response to pollutant exposure. Biomarkers can be placed into three groups; - biochemical, - immunochemical, and - genetic.
Use of Biomarkers in Epidemiology and Clinical Medicine Traditional ExposureDisease Biological or Molecular Epidemiology Markers of Exposure Biomarkers of Disease Exposure dosebiological effect Altered clinical prognosis structure/ diagnosis function
Predictive Biomarkers for Lung Cancer Current Status / Perspectives: Although curative resection of patients with early-stage lung CA are performed, the risk of relapse remains substantial Indicates that there may be micro- invasion/metastasis have not been detected by general imaging and/or pathological examinations Predictive biomarkers will allow the selection of lung cancer patients who may need more aggressive screening and treatment Predictive biomarkers will allow the selection of lung cancer patients who may need more aggressive screening and treatment
2.1.Biochemical biomarkers Based on the ability of the pollutant to generate a response at the gene level, inducing or increasing specific enzymes involved with detoxification of contaminants. The detoxification of xenobiotics often involves one of three detoxification strategies: - cytochrome P450, - conjugation with glutathione and -chelation by proteins (Metallothioneines).
2.2.Immunochemical biomarkers The specific reaction between antigens and antibodies can be used to determine the presence of xenobiotics in environmental samples. Antibodies against PCBs (polychlorinated biphenyls), PCDDs (polychlorinated dibenzo-p-dioxins), and PCDFs (polychlorinated dibenzofurans) have been developed and used in an ELISA system to determine PCBs in samples (Hahn, 2002).
2.3.Genetic biomarkers Ames test The Ames test was developed to test substances for their ability to produce mutations in bacteria. The test consists of the treatment of a Salmonella typhimurium histidine auxotroph (His - ). The test compound is added to the Salmonella typhimurium His - in an extract of rat liver. If the compound is a mutagen then mutations will cause revertants- colonies will form on a medium lacking histidine. The number of colonies will give a measure of the mutagenic potential.
2.4.Molecular biology biomarkers Another development using genetic manipulation of biological material for the estimation of toxicity has been the generation of a transgenic strain of the nematode Caenorhabditis elegans. The lacZ gene from E. coli is fused to the hsp16 gene. When the nematode is stressed the enzyme is induced in the worm. The enzyme can be detected by the addition of a substrate such as o-nitrophenyl-p-galactopyranoside (ONPG), which will produce a blue colour when cleaved by the enzyme.
2.5.Fish and Endocrine Disruptors/ Modulators Fish are good indicators for the aquatic environment Fish health and fish populations Commercially and recreationally-important species Ecologically important species Indicators of effects on aquatic ecosystem and ultimately human health
2.5.1.Endocrine Modulators Synthetic or naturally-occurring chemicals that modify or disrupt normal hormonal functions Alterations in synthesis and metabolism Improper balance or quantity of circulating hormones Directly or indirectly interact with natural hormones Change hormone message and alter cell activity Induce creation of extra receptor sites Amplify the hormone effect on cell activity Block binding sites Impair normal cell activity Bind to receptors (hormone mimics) Abnormal, unpredictable cell activity
Common Serum Markers for Cancer Diagnosis/prognosis AFPCEACA 15-3 CA 19-9 CA125PSAPSAfPAPhTGHCG b FerrNSEB2MA2M Lungxxxxxxx Pancreasxxxxx Kidneyxxxx Breastxxx Ovarianxxxxxx Cervicalxx Uterinexxxx Prostatexxxxx Liverxxxxx Gastroxxx Colonxxxxx Bladderx Brainx Leukemiaxxx Myelomax Thyroidxx Testicularxxxx
Prostate Cancer marker PSA PSA is a protein normally made in the prostate gland in ductal cells that make some of the semen. PSA helps to keep the semen liquid. PSA, also known as kallikrein III, seminin, semenogelase, γ-seminoprotein and P-30 antigen, is a glycoprotein, a serine protease glycoproteinserine protease PSA has several forms in serum Free Pre-enzyme Complex Inactive
B.BIOINDICATORS Bioindicator organisms are those that can be used to identify and quantify the effects of pollutants on the environment. Lichens are a symbiotic relationship between an alga and fungus and are particularly sensitive to air pollutants and have been used widely used as bioindicators of air quality (Conti and Cecchetti, 2001) Honey bees have been used as a bioindicator for the contamination of the atmosphere by heavy metals (cadmium, chromium, and lead). The filter-feeding mussels are known to accumulate heavy metals, making them ideal for the monitoring of coastal waters eg. Mediterranean mussel Myttlus galloprovincialis (Regioli and Principato, 1995). Frogs, fish eggs as a measure of water quality
Bioindikator adalah kelompok atau komunitas organisme yang keberadaannya atau perilakunya di alam berhubungan dengan kondisi lingkungan Apabila terjadi perubahan kualitas air maka akan berpengaruh terhadap keberadaaan dan perilaku organisme tersebut, sehingga dapat digunakan sebagai penunjuk kualitas lingkungan.
Characteristics Associated Organism Thallus (Mass of Hyphae Grasping Algae) Symbiotic Relationship Lichenized Pioneers in New Environments Long Lifespan (9000 Years Old)
Crustose (Crusty) Flat Edges Unlobed Closely Attached to Substrate
Foliose (Leafy) Sandwich of Fungal Layer with Algal Mat in Middle Circular Growth Lobes Rootlets Called Rhizines
Leprose (Powdery) Powdery Masses with Little or No Organized Structure
Squamulose Similar to Crustose, but with Raised Edges which can be Folded or Lobe- Like.
An Early Bioindicator – A Canary in a Mine
British Lichen Bioindicator Air Pollution Sulfur Dioxide Toxic Elemental Pollutants Radioactive Metals Heavy Metals Ozone
England and Wales Loss of 1/3 of Lichens Due to Sulfur Dioxide Emissions
Air Pollution Leads to Acid Rain 1.First Loss -- Birches and Conifers 2.Next on -- Oaks and Sycamores 3.Finally -- Elm
"Wolf lichen" (Letharia vulpina) was the most widely used dye lichen for native peoples in North America The Apache painted wolf-lichen crosses on their feet so they could pass their enemies unseen. Tribes (the Gitksan) in British Columbia associated the lichen Lobaria pulmonaria with frogs and used it in a spring bathing ritual to bring health and long life.
What are indicator species? Some species can alert us to harmful changes that are taking place in biological communities (Miller,,Living in the Environment: p. 147) A famous example is the canaries that coal miners took down into the mine shafts in the 1800’s and early 1900’s. We call these bioindicators. They can tell us about the overall health of an ecosystem.
We will be studying species that act as bioindicators of stream quality. Insect larvae that develop in streams are valuable bioindicators. An example is the Dameselfly. The presence of Damselfly adults (left) and larvae (right) indicate moderately clean water. They are somewhat sensitive to pollution and so water they are found in will be of good to fair quality. Why are we concerned about the quality of stream water, anyway? works/cranefly.html
Plankton kton merupakan organisme perairan yang keberadaannya dapat dijadikan indikator perubahan kualitas biologi perairan sungai. Plankton memegang peran penting dalam mempengaruhi produktifitas primer perairan sungai. Bentos merupakanindikator biologis dalam mempelajari ekosistem sungai. Hal ini disebabkan adanya respon yang berbeda terhadap suatu bahan pencemar yang masuk dalam perairan sungai dan bersifat immobile Jenis Bioindikator
What do we mean when we say ‘healthy stream’? Plenty of Oxygen 0 2 A healthy food web Habitat for reproduction
Mudah dalam identifikasi taksonomi Terdistribusi secara luas Jumlah banyak Karakter ekologinya diketahui Variabitas ekologi dan genetiknya rendah
BIOINDICATION IN AQUATIC ECOSYSTEMS
Biological Methods to Assess Water Quality Physiological methods = experimental - ecological methods Ecological methods = descriptive - analytic field methods
Physiological Methods = Biotests Activity of particular metabolic features of the sample Effect of the sample on the bioactivity of exposed organism
Ecological Methods = Bioindication Community of organism reflects the situation of the ecosystem Single Taxa have specific optima and tolerance ranges for selected environmental factor = Bioindicators
Index of Saprobity
CategoryOrganic Pollution SaprobitySI INo polutionOligosaprobic1,0 to <1,5 I-IIFew polutionOligo to beta- mesosaprobic 1,5 to <1,8 IIModerate polution Beta mesosprobic 1,8 to <2,3 II-IIICritical polutionBeta to Alpha- mesosaprobic 2,3 to <2,7 IIIHigh PolutionAlpha- mesosaprobic 2,7 to 3,2 III-IVVery high polution Alpha- mesosaprobic to polysaprobic 3,2 to < 3,5 IVExtremly high pPolysaprobic3,5 to 4,0
We can study populations of Macroinvertebrates as bioindicators of the health and oxygenation of a stream. Macro means large enough to see with your eyes. Invertebrate means animals without backbones. 95% of all animals are invertebrates! Examples: insect larvae, crayfish, worms, adult aquatic insects
Why do these macroinvertebrates make good bioindicators of stream and watershed health? live in the water for all or most of their life stay in areas suitable for their survival are easy to collect differ in their tolerance to amount and types of pollution are easy to identify in a laboratory often live for more than one year have limited mobility
Bioindicators are grouped according to their tolerance of pollution/water quality. gg gg Dragonfly larvae tolerate some pollution. 1.http://www.schoolsliaison.org.uk/woodgate/strea mhabitat1.http://www.schoolsliaison.org.uk/woodgate/strea mhabitat. Caddisfly larvae are intolerant of pollution. Leeches and blood midge larvae are very tolerant of pollution 1.http://www.schoolsliaison.org.uk/woodgate/streamhabitat & michellemahood/image/ http://www.schoolsliaison.org.uk/woodgate/streamhabitat
These are Bioindicators which are Pollution Intolerant. Their presence tells you that the water quality is excellent. We will use the dichotomous key to identify some of these! images from pathfinderscience.net unless otherwise cited nnymr005872_md.jpg
Periphyton as indicators Periphyton are used as indicators of environmental condition because they respond rapidly and are sensitive to a number of anthropogenic disturbances, including: habitat degradation nutrient enrichment metals herbicides hydrocarbons acidification
Periphyton – Sampling methods One way to scrape a known area is to lay a plastic 35 mm slide (film removed) over the rock and scrape off the material within the slide area scrub area = 2.3cmX3.5cm=8cm2
Rocks don’t always look like they have much on them Nearly all the stuff scrubbed off this one was organic matter –most of it living algae S.Loeb and J.Reuter images Periphyton – Sampling methods
Material from a rock scrub contains macro and micro invertebrates, detritus, fungi, bacteria, as well as algae periphyton – in situ sampling
Periphyton – III. Preservation methods Lugols’s iodine can used if the algae of interest are soft bodied forms (i.e. blue-greens and green algae). If interested only in diatoms, it may be best to preserve in 70% ethanol. Freeze sediment samples if they are to be analyzed for surficial chlorophyll.
Here’s a portion of the previous sample after being deposited on a glass fiber filter in preparation for chlorophyll extraction or AFDW determination. Periphyton – sample prep
Periphyton – pigment analysis Chlorophyll extraction: Tear filter into several pieces Place in a test tube Add 10 mLs of 90% acetone Extract overnight at 4 o C Chlorophyll analysis After hr extraction, centrifuge to settle filter debris Read absorbance or fluorescence of the supernatant
Periphyton – biomass estimation Wet weight Dry weight (dried at 103–105 o C) Ash free dry weight (AFDW) Loss on ignition (LOI) Combust at o C Chlorophyll (extract as per phytoplankton) Particulate organic carbon and/or nitrogen (POC or PON) Muffle furnace
Once you have a measure of chlorophyll or AFDW you’ll need to calculate per unit area. Periphyton – biomass calculations
Fish: index of biotic integrity
Fish Fish and other aquatic vertebrates can indicate stream quality Extensive life history information is available for many species, Because many fish are high order consumers, they often reflect the responses of the entire trophic structure to environmental stress Fish provide a more publicly understandable indicator of environmental degradation Fish generally have long life histories and integrate pollution effects over longer time periods and large spatial scales
Fish Varieties Collection Methods Seines Electroshocking Backpack Barge or boat
Major groups of fish Petromyzontidae - lampreys Acipenseridae – sturgeons Amiidae – bowfin Cyprinidae – minnows, dace, chubs, carp Catostomidae – suckers Ictaluridae – bullheads, catfish, madtoms Esocidae – pike Umbridae – mudminnows Umbridae – salmon, trout, whitefish Gasterosteidae – sticklebacks Cottidae – sculpins Moronidae – white perch, white bass Centrarchidae – bass, sunfish Centrarchidae – darters, perch, walleye
Fish: index of biotic integrity This index is a scientifically validated combination of measurements concerning fish communities in streams and rivers. The components of a typical fish IBI fall into three broad categories: 1. fish species richness and abundance, 2. food chain composition and reproductive function, and 3. fish abundance and condition.
Fish: index of biotic integrity An IBI is expressed as a single index value, based on the measurements of particular characteristics of the stream or river Because the rivers and streams are physically, chemically and biologically diverse, the measured characteristics are compared to specific reference values for the type and location of river or stream.
Fish: index of biotic integrity IBI values range from 0 to 100. A low IBI value indicates the fish community is substantially different from a minimally disturbed stream in the same geographic area. A high IBI value indicates the fish community is similar to a minimally disturbed stream in the same geographic region