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Abstract

The Kuki-Chin-Mizo population comprising traditionally endogamous tribal groups residing in the state of Mizoram, India claim their descent from the ten lost tribes of Israel that were exiled by the Assyrians. To ascertain their oral history, we analysed DNA markers comprising 15 autosomal microsatellite markers, 5 biallelic and 20 microsatellite markers on Y-chromosome and the maternally inherited mitochondrial DNA sequence variations on 414 individuals belonging to 5 tribal communities from Mizoram (Hmar, Kuki, Mara, Lai and Lusei). The genetic profiles obtained were compared either with populations sharing Jewish ancestry or with local populations along the probable route of migration of the Jewish ancestry claimant Mizoram tribes. Y-STR analyses showed absence of the Cohen Modal Haplotype, the genetic signature of Cohanim origin. Y-chromosomal biallelic marker analyses revealed the presence of East and Southeast Asian-specific lineages and absence of haplogroup J predominant among Jewish populations. The mitochondrial DNA sequence analyses however revealed traces of genetic relatedness between the Jewish ancestry claimant Mizoram tribes and Near Eastern lineages. Autosomal analyses showed moderate degree of genetic differentiation among the different Mizoram tribes. Migration of the lost tribes through China resulting in subsequent genetic admixture over a long period of time has probably diluted the extant gene pool of the Kuki-Chin-Mizo population. Although their paternal lineages do not exhibit any trace of Jewish ancestry, incidence of maternal Near Eastern lineages among the Mizoram tribals suggests their claim to Jewish ancestry cannot be excluded.
Genome Biology 2004, 6:P1
Deposited research article
Tracking the genetic imprints of lost Jewish tribes among the gene
pool of Kuki-Chin-Mizo population of India
Bhaswar Maity, T Sitalaximi, R Trivedi and VK Kashyap
Addresses: National DNA Analysis Center, Central Forensic Science Laboratory, 30 Gorachand Road, Kolkata - 700014, India.
Correspondence: VK Kashyap. E-mail: vkk2k@hotmail.com
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Tracking The Genetic Imprints of Lost Jewish Tribes Among
The Gene Pool of Kuki-Chin-Mizo Population of India
Bhaswar Maity, T Sitalaximi, R Trivedi, V K Kashyap*
National DNA Analysis Center
Central Forensic Science Laboratory
30 Gorachand Road,
Kolkata – 700014
India
*Corresponding author
Email addresses:
VKK: vkk2k@hotmail.com
BM : bhaswar61@hotmail.com
ST : ssita2k@yahoo.com
RT : trivedi_r@hotmail.com
Abstract
Background
The Kuki-Chin-Mizo population comprising traditionally endogamous tribal groups residing in
the state of Mizoram, India claim their descent from the ten lost tribes of Israel that were exiled
by the Assyrians. To ascertain their oral history, we analysed DNA markers comprising 15
autosomal microsatellite markers, 5 biallelic and 20 microsatellite markers on Y-chromosome
and the maternally inherited mitochondrial DNA sequence variations on 414 individuals
belonging to 5 tribal communities from Mizoram (Hmar, Kuki, Mara, Lai and Lusei). The
genetic profiles obtained were compared either with populations sharing Jewish ancestry or
with local populations along the probable route of migration of the Jewish ancestry claimant
Mizoram tribes.
Results
Y-STR analyses showed absence of the Cohen Modal Haplotype, the genetic signature of
Cohanim origin. Y-chromosomal biallelic marker analyses revealed the presence of East and
Southeast Asian-specific lineages and absence of haplogroup J predominant among Jewish
populations. The mitochondrial DNA sequence analyses however revealed traces of genetic
relatedness between the Jewish ancestry claimant Mizoram tribes and Near Eastern lineages.
Autosomal analyses showed moderate degree of genetic differentiation among the different
Mizoram tribes.
Conclusions
Migration of the lost tribes through China resulting in subsequent genetic admixture over a
long period of time has probably diluted the extant gene pool of the Kuki-Chin-Mizo
population. Although their paternal lineages do not exhibit any trace of Jewish ancestry,
incidence of maternal Near Eastern lineages among the Mizoram tribals suggests their claim to
Jewish ancestry cannot be excluded.
Background
Contemporary Jewish communities spread across Asia, Europe and North Africa trace
their origins to ancient Judea and Israel. However, historical records that attribute these Jewish
populations to the early dispersals from ancient Israel are often under dispute. Moreover, the
origins of a number of minority populations that claim Jewish ancestry are seldom well
documented. Prolonged geographic separation of these groups has led to variations in religious
practices and languages that fail to throw up similarities that would indicate shared ancestries.
Interactions with local populations have also contributed towards diluting the purported
ancestry of these Jewish populations.
The Kuki-Chin-Mizo population inhabiting the northeastern state of Mizoram in India,
claim to be descendants of one of the ten lost tribes of Israel. Although historical records
attributing to their Jewish ancestry are absent, their oral traditions and socio-cultural
procedures present striking parallelism with Judaism. According to their oral history, these
tribes are said to have entered Mizoram, India from adjacent Myanmar. Although ethnically
they are of Mongoloid descent and speak Tibeto-Burman languages, their tradition ascribes
their origin to B’nai Menashe – a remnant of the ancient Israelite tribe of Menasseh. Further
support arises from their socio-cultural and oral histories:
1. The tribes observe 3 festivals in a year similar to Jews.
2. Funeral rites, birth and marriage ceremonies of the tribes reflect analogy with ancient
Judaism.
3. Local legend describes presence of scattered remnants of the lost Jewish tribe of
Menashe more than 1,000 years ago in a cave in China that then made its way across
Thailand into India.
According to Hranglien Songate [1], the tribes entered China after passing through
Afganistan and Baluchistan. The ten lost tribes: Reuven, Dan, Naphtali, Gad, Asher, Issachar,
Zebulun, Ephrain, Menasseh and Levi of ancient Israel were taken up as captives by Assyrians
in 722 BC and taken to Persia following their exile in 457 BC. In 331 BC when Alexander the
Great conquered Persia, Afghanistan and India, these tribes were sent away to Afganistan and
other countries. The later migrations are said to have taken place eastwards through Hindukush
until they reached the Tibetan region and China. In China, they were forced to serve as slaves.
Thus the process of assimilation and subjugation had started and the forefathers of the Kuki-
Chin-Mizo population are believed to be those who had resisted the assimilation and had made
their way south through Thailand to Burma, India and Bangladesh. According to oral
testimonies only a small part of the current Kuki people are originally related to the tribe of
Menashe. The descendants of Menashe are supposed to have been assimilated by Kuki
invaders at the end of 15th centur
y
in northeastern India [2].
Recent genetic studies have tried to establish similarities among groups sharing Jewish
ancestry [3,4].Analyses of the paternally inherited Y-chromosome have revealed the
occurrence of a specific microsatellite haplotype, ‘Cohen modal haplotype’ (within haplogroup
J) at high frequency in Jewish Cohanim [5], suggesting that it might be the genetic signature of
ancient Hebrew population. The Cohen haplotype has been subsequently identified in both
Jewish and non-Jewish Near Eastern populations [6,7] as well as in populations such as the
Lemba [8], whose oral tradition suggested Jewish ancestry. Haplogroup J is reported to be the
major haplogroup in Jewish populations [9]. Haplogroup R1a1 has been found to be
predominant in Ashkenazi Levites [9], while haplogroups R1b and R* have been identified in
high frequencies among Sephardic Jews [10]. Mitochondrial DNA (mtDNA) analyses have
also revealed population specific haplotypes [11,12] in different Jewish groups suggesting
most Jewish communities were founded by relatively few women independently in different
geographic areas.
Here we analyse tribes belonging to the Kuki-Chin-Mizo population from Mizoram using
autosomal, Y-chromosomal and mitochondrial markers to ascertain their claims of Jewish
ancestry. Given their marked East Asian appearance, we attempt to trace genetic signatures of
Near Eastern origin in their maternal and paternal lineages amongst expected extensive East
Asian admixture.
Results and Discussion
Y-chromosomal Analyses
Comparison of Y-chromosomal and mtDNA patterns of Kuki, Hmar and other
Mizoram tribes revealed maternal and paternal lineages to have undergone different fates.
Analyses at six Y-STR loci; DYS19, DYS388, DYS390, DYS391, DYS392 and DYS393 in 74
individuals reveals that all the alleles for the studied populations fall within the ranges 14-17,
8-11, 23-25, 9-11, 10-13 and 11-14 respectively (Table 1). On comparison of the Y-
chromosomal haplotypes of Kuki, Hmar and other analysed Mizoram tribes with known Jewish
communities (Ashkenazic Jews, Sephardic Jews and Lemba) [8], no shared haplotypes were
observed. Furthermore, the Cohen modal haplotype found predominantly among Ashkenazic
and Sephardic Cohanim[5], was also not observed in the Mizoram tribes suggesting absence of
ancient Hebraic signature in the paternal lineage of contemporary Mizoram tribes. Further
analyses with Y-chromosomal binary markers revealed the male samples falling into Y-
chromosomal haplogroups K*, O2a, O2a1 and O3e. These haplogroups are found
predominantly in populations of East and Southeast Asia [13-15]. Haplogroup J that is found in
high frequencies among Jewish populations across the world [9] was absent among the
Mizoram tribes indicating their extensive admixture with the local male population has
probably eliminated any trace of Jewish ancestry. Other haplogroups such as R1a1 found in
high frequency in Ashkenazic Levites [9], and haplogroups R1b and R* found among Jews of
Sephardic ancestry [10] were also not observed in the Mizoram tribes. Haplogroups K* and O
have been reported in high frequencies in populations inhabiting northeastern India [16,17]
consistent with migrations to the area from East and Southeast Asia. Occurrence of these local
paternal lineages in the Kuki, Hmar and other Mizoram tribes analysed reveals extensive
admixture with local populations, with absence of any traces of earlier paternal Jewish ancestry
similar to Ethiopian Jews [10], who presented predominantly local African lineages, albeit
single representations of J2e and K2 lineages.
Mitochondrial Analyses
A total of 46 mtDNA haplotypes were observed in 50 of the Mizoram individuals
analysed. A neighbour-joining tree (Fig. 2) constructed based on the haplotypes revealed
similarity of the Kuki and Lusei populations with the Jewish samples taken from literature [11]
for the analysis. Further analysis of the mtDNA haplogroups revealed occurrence of
predominantly East Asian specific lineages in the Mizoram tribes. However, incidence of
haplogroup W in the Kuki population demonstrated presence of Near Eastern mtDNA lineage
in this tribe. Interestingly, Near Eastern lineages have not been identified in other Jewish
populations of India [11,18], where the local gene pool had probably overwhelmed the original
maternal gene pool of Jewish migrants. The Central Asian contribution to the extant lineages of
Mizoram tribes was also evident from presence of MG2a lineage amongst the Kuki. In
addition, HVSI motif 129, 223 found in high frequency in Jews of Uzbekistan, occurred with
additional mutations in the Mizoram tribes.
Autosomal Analyses
Population wise average heterozygosities and locuswise GST values reflecting the extent of
population differentiation are given in Table 2. The average GST value (0.020) reveals
moderate degree of genetic differentiation among the Mizoram tribes suggesting a common
origin.
The genetic evidence from analyses of the Kuki-Chin-Mizo population suggests their
paternal Jewish lineage has been lost through the gradual subjugation of the population by
dominating local groups. The original maternal lineage on the other hand has been assimilated
into the local community and hence diluted over generations with only traces of Near Eastern
ancestry currently discernible. The females of any population represent the torchbearers of
their social tradition and more so among Jewish communities where Jewishness has been
defined by maternal descent in absence of priestly approval. The genetic structure of the Kuki-
Chin-Mizo population also draws parallelism to Ethiopian Jews [10] whose maternal lineage
has also been overwhelmed by the local gene pool with only traces of Near Eastern ancestry
still perceptible.
Conclusions
Although signatures of paternal inheritance of Jewish ancestry were not traceable, the genetic
evidence revealed in this study is consistent with a plausible maternal Near Eastern
contribution to the extant Kuki-Chin-Mizo gene pool. Haplogroup W has not been reported
among other northeastern Indian tribal populations [19], hence its incidence among the
Mizoram tribals suggests their claim to Jewish ancestry cannot be excluded. The presence of
Central Asian-specific mtDNA haplogroups [20] further corroborates the oral tradition tracing
their migration along the Silk Route. Studies across global Jewish populations have elucidated
greater mtDNA differentiation than Y-chromosomal [10,11] while the opposite has been found
true in other global communities [21,22]. The geographic structuring evident in mtDNA of
Jewish populations signified different founding female lineages among diverse Jewish
communities [10-12]. Since Talmudic times (circa 200 B.C. to 500 A.D.) Jewish identity in the
absence of rabbinically authorized conversion has been determined through maternal descent
[23]. It is likely that remnants of maternal founding lineages of the Kuki-Chin-Mizo population
have survived while the original paternal gene pool has been obliterated by the overwhelming
local contribution.
Methods
Sample collection and extraction of DNA
Blood samples of Kuki, Hmar and other tribes were collected by venipuncture from unrelated
healthy volunteers of Mizoram. Individuals of all the populations present Mongoloid features.
They form very distinct small groups and endogamy is practiced within each community. No
comprehensive historical records about these populations are available. The samples belong to
Kuki (60), Hmar (80), Mara (90), Lai 92) and Lusei (92) tribes. The Kuki and the Hmars are
also found to be present in the neighbouring state of Manipur. DNA isolation was carried out
by organic extraction method [24]. Quantity of the extracted DNA was estimated by slot blot
technique using Quantiblot kit (Perkin Elmer, Foster City, CA, USA).
Genotyping
Y-Chromosomal Analyses
Haplotypes: We genotyped all the population samples for 20 STRs of which the data for six
markers [DYS19, DYS388, DYS390, DYS391, DYS392, DYS393, CMH markers] are
presented in this paper. All the markers were amplified with 25ng of template DNA in a
multiplex PCR following conditions described elsewhere [25]. The standardization has been
performed with NIST primers in our laboratory. The amplified samples were genotyped on
Genetic Analyzer 3100 (Applied Biosystems, USA) and the fragment lengths were converted
to repeat numbers by the use of allelic ladders for further statistical analysis.
Haplogroups: In all the population samples we have typed a set of thirty-five biallelic markars
including one Alu insertion on hierarchical basis for defining the male genetic lineage. PCR
protocols for detection of these polymorphisms were followed according to Underhill et al.
1997 [26] and haplogroups defined according to the Y Chromosome Consortium (2002) [27]
nomenclature.
Mitochondrial DNA Sequence Analyses
The samples were amplified with primers L15997 and H16391 [28] for obtaining the sequence
information in hypervariable segment I (HVSI). Amplicon sequence was determined using
Genetic Analyzer ABI 3100 (Applied Biosystems, USA). A total of 100 samples from the 5
communities were sequenced for the HVSI region of the mtDNA. The final sequence
information generated for each individual was a stretch of length of 390 nucleotides for base
positions 16010 to 16400. The mtDNA sequences were aligned using the Clustal W program
available in the software package - Bio Edit. For identifying the variable nucleotide positions
the sequences were compared with the revised Anderson sequence [29]. The inter-population
distances were calculated using AMOVA analysis option present in Arlequin software.
Neighbour-joining tree was built using the software programme - Mega. The genetic
relationship of the Kuki, Hmar and other Mizoram tribes with Jews or local populations along
their probable route of migration was established from calculating the mean genetic distance
DA , defined as DA =dXY-(dX+dY)/2, where dXY is the mean pairwise difference between
individuals from population X and Y and dX (dY ) is the mean pairwise difference between
individuals within population X(or Y) [30].
Autosomal Microsatellite Analyses
Fifteen autosomal STR markers were amplified with PowerPlex 16 kit (Promega Corporation,
USA) following the protocol provided by the manufacturer .The allele designation was carried
out following electrophoresis in ABI 377 automated DNA sequencer (Applied Biosystems,
USA) using Genotyper software. Average heterozygosity and GST values were estimated using
DNA Type and Dispan softwares.
Authors' contributions
BM collected all the samples, carried out the molecular genetic studies, participated in the
sequence alignment and drafted the manuscript. ST provided some critical new information
and contributed significantly to editing of the manuscript. The contributions of BM & ST are
equal. RT provided the technical support and coordinated the entire study. VKK conceived of
the study, and participated in its design and manuscript preparation. All authors read and
approved the final manuscript.
Acknowledgements
We thank Revathi Rajkumar and Sanghamitra Sahoo for providing extensive assistance in mt
DNA & Y Chromosomal analysis. This work was supported by a grant under the Ninth Plan of
Government of India, to Central Forensic Science Laboratory, Kolkata. This study would not
have been possible without the voluntary participation of individuals of the studied
populations. BM & ST were assisted with DFS and CSIR Research Fellowships respectively.
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Figures
Figure 1 - Cladogram of Y chromosomal lineages of Kuki, Hmar and other three
Mizoram population
Figure 2 - Neighbour joining tree Based on mt. DNA haplotypes showing affinity
between Kuki and Jewish population
Figure legend text:
Ti- Tibetan population, Zu- Zhuang population, Th-Thai Population, Tu- Tu Population, Tur-
Turky Population, H-Hmar Population, Lu-Lusei Population, L-Lai Population, M-Mara
Population, Kuki- Kuki Population, Jew- Jewish Population
Tables
Table 1 - Distribution of Y-Chromosome Haplotypes in Kuki,Hmar and other three Mizoram
Populations
Table legend text:
KU: Kuki Population, LU : Lusei Population, LA:Lai Population, MA:Mara Population, HM:Hmar
Population
Table 2 - Locus wise average Heterozygosity and GST values based on autosomal STR
loci for Kuki, Hmar and other three Mizoram tribes
TABLE 1 : Distribution of Y-Chromosome Haplotypes in Kuki, Hmar and other three Mizoram
populations
No. of Microsatellite Repeats in No. of Y Chromosomes
Haplotype index in Populations
Number
DYS19 DYS388 DYS390 DYS391 DYS392 DYS393 KU LU LA MA HM
1 14 9 23 10 11 12 2 * * * *
2 14 9 23 10 10 12 2 * * * *
3 15 9 22 10 13 11 1 * * * *
4 15 9 24 9 13 13 1 * * * *
5 16 11 24 9 13 12 1 * * * *
6 16 11 24 10 13 13 1 * * * *
7 14 11 23 10 11 13 1 * * * *
8 14 9 24 10 11 12 * 1 * * *
9 14 9 24 10 10 11 * 1 * * *
10 14 11 23 9 13 11 * 1 * * *
11 14 9 23 10 13 12 * 2 * * *
12 14 11 24 10 13 11 * 1 * * *
13 15 9 24 10 13 12 * 1 * * *
14 15 11 24 9 10 12 * 1 * * *
15 15 11 24 10 13 13 * 2 * * *
16 15 11 24 9 13 11 * 1 * * *
17 16 11 24 9 13 12 * 3 * * *
18 16 11 24 10 13 12 * 1 * * *
19 14 9 24 9 13 11 * * * 2 *
20 14 11 24 9 13 13 * * * 1 *
21 14 9 24 9 13 12 * * * 1 *
22 15 9 24 9 13 11 * * * 2 *
23 15 11 24 9 13 11 * * * 2 *
24 15 11 24 9 13 12 * * * 3 *
25 15 11 24 9 13 13 * * * 1 *
26 16 11 24 9 13 11 * * * 1 *
27 16 11 24 9 13 12 * * * 2 *
28 15 9 25 9 13 11 * * * * 2
29 15 9 24 9 13 12 * * * * 4
30 15 9 24 11 11 13 * * * * 3
31 16 9 24 11 11 12 * * * * 2
32 16 9 24 9 13 13 * * * * 5
33 17 9 24 9 13 12 * * * * 2
34 14 9 24 9 13 12 * * 1 * *
35 14 9 24 9 13 11 * * 3 * *
36 14 9 24 9 13 12 * * 1 * *
37 15 8 24 9 13 14 * * 1 * *
38 15 9 24 9 13 11 * * 1 * *
39 15 9 24 9 13 12 * * 1 * *
40 15 11 24 9 13 12 * * 2 * *
41 15 11 24 9 13 11 * * 1 * *
42 16 9 24 9 13 12 * * 5 * *
43 16 11 24 9 13 12 * * 1 * *
Table- 2
Locus wise average Heterozygosity and GST values based on autosomal STR loci for
Kuki,Hmar and other three Mizoram tribes
Locus Hmar Mara Lai Lusei Kuki GST
D18S51 0.850 0.822 0.826 0.848 0.895 0.012
D21S11 0.825 0.867 0.783 0.783 0.775 0.017
D5S818 0.825 0.778 0.783 0.783 0.834 0.012
D13S317 0.900 0.822 0.826 0.761 0.821 0.012
D7S820 0.875 0.844 0.826 0.783 0.709 0.012
vWA 0.800 0.778 0.608 0.804 0.834 0.018
D8S1179 0.850 0.822 0.761 0.674 0.792 0.019
FGA 0.900 0.800 0.913 0.848 0.542 0.012
D3S1358 0.700 0.733 0.652 0.609 0.874 0.069
Average
Heterozygosity
0.814 0.819 0.808 0.808 0.824 0.020
Mara
--
0.8
--
0.2
Hmar
0.1
0.7
0.1
0.1
Lai
--
0.5
--
0.5
Lusei
--
0.823
--
0.167
Population
Frequency
Kuki
0.1
0.143
--
0.857
K O2a O2a1 O3e
M 8
H 1
T i 5
L U 5
L U 1
L U 4
T i 6
L 1
Z u 24
Z u 25
Z u 26
T h 4
M 2
T i 1
T h 9
T i 2
T u 8
T u 9
M 4
M 3
T u 7
Z u 5
Z u 6
t u r 4
Z u 4
M 5
H 8
L 3
M 10
L 10
T h 3
t u r 5
L 5
L 2
L 9
Z u 3
T h 6
H 5
H 2
M 6
T i 4
L 7
Z u 1
Z u 2
T i 3
M 1
Z u 23
Z u 17
T h 1
Z u 16
Z u 115
T h 2
Z u 19
Z u 22
Z u 20
Z u 21
Z u 7
Z u 8
j e w 17
j e w 8
T h 7
T h 8
j e w 11
j e w 19
j e w 10
j e w 2
j e w 3
Z u 11
Z u 14
t u r 1
T h 5
j e w 6
j e w 20
j e w 5
j e w 7
j e w 1
KUKI 1
j e w 9
j e w 13
L U 2
L U 8
L U 9
L U 10
j e w 15
j e w 12
KUKI 9
KUKI 3
KUKI 6
KUKI 10
KUKI 5
L U 7
j e w 18
j e w 16
KUKI 8
H 3
H 9
Z u 27
Z u 28
L U 3
KUKI 2
L U 6
KUKI 4
j e w 14
KUKI 7
H 7
L 6
H 6
M 9
T u 1
T u 3
T u 2
Z u 9
Z u 10
T u 5
T u 4
T u 6
Z u 12
Z u 13
j e w 4
Z u 18
L 4
L 8
t u r 3
Z u 15
M 7
H 10
H 4
T h 10
t u r 2
Figure-2
Neighbour joining tree Based on mt. DNA haplotypes showing affinity between
Kuki and Jewish population
... The bark is used in India for fever, bacterial infections, and wound treatment [19]. Mizoram in Northeast India, the most distant state inhabited by the Mizo people, lies within the Indo-Burma biodiversity hotspot [20]. In Mizo traditional medicine, the extracts from the bark Copyright: Lalthanpuii and Lalchhandama. ...
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Background and Aim Schima wallichii Korth., commonly known as the needlewood tree (family Theaceae) has therapeutic uses in traditional Mizo medicine for human helminthiasis and serves as a balm against ectoparasites in animals. Although the medicinal properties have been studied experimentally, its use as a traditional anthelmintic remains unexplored. This study aimed to analyze the chemical components and antiparasitic activity of S. wallichii. Materials and Methods The chemical analysis of S. wallichi bark extracts was conducted focusing on the secondary metabolites using petroleum ether, chloroform, and methanol. Gas chromatography-mass spectrometry (GC-MS) was used to identify the specific compounds. An anthelmintic susceptibility test was carried out against Raillietina tetragona, intestinal cestode parasite of fowl. Results The methanol extract yielded the highest concentrations of alkaloids, carbohydrates, glycosides, sterols, saponins, and tannins among all the extracts. Sterols were the most abundant compounds in all extracts, with flavonoids being absent. Secondary metabolites were largely absent in the petroleum ether and chloroform extracts. The GC-MS data identified cholest-22-ene-21-ol as the major steroid component. The cestode parasite was inhibited in a concentration-dependent manner by the plant extract. The plant extract’s anthelmintic activity was evident through observable damage to the parasite’s outer structure. Conclusion Phytosterols in S. wallichii bark are responsible for its anthelmintic properties. The mechanism and pharmaceutical properties of the anthelmintic molecule require further exploration.
... In the present study for the first time, an attempt is made in order to understand the association of rs9939609 A allele polymorphism with T2D in two North-Eastern tribal populations of India, occupying the same geographical area. However, these selected study populations have different ancestral origin [27,35] and are also different with respect to the prevalence of obesity, where obesity among Mizo tribe is more compared to the Liangmai tribe [36]. The prevalence of FTO A allele, impaired fasting glucose, and type 2 diabetes are found to be significantly higher among the Mizo as compared to that of the Liangmai tribe. ...
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Diabetes is one of the most underrated epidemic worldwide, and its prevalence has increased rapidly in developing nations like India. It has increased not only in the general population per se, but even among the indigenous tribal populations also. Several candidate genes have been associated with type 2 diabetes, and the association of type 2 diabetes and FTO rs9939609 gene polymorphism is a matter of debate. The present study aims to understand the prevalence of type-2 diabetes and its association with FTO rs9939609 gene polymorphism, among the Naga and Mizo tribe of Manipur, North East India. Demographic, somatometric variables and blood samples from 521 individuals were collected and FTO rs9939609 variant was screened. The prevalence of type 2 diabetes/impaired fasting glucose was found to be 10.1 and 43.73% among the Liangmai and Mizo tribe, respectively. The FTO variant showed an increased risk for impaired fasting glucose (OR 1.25; CI 0.38–4.1) among the Liangmai tribe, but among Mizo tribe, it showed an increased risk for type 2 diabetes (OR 1.34; CI 0.73–2.4), albeit with no statistical significances. This suggests that there seems to be diverse effect of FTO rs9939609 A allele in the two tribes, i.e., disadvantageous effect among Liangmai tribe and an adaptive effect among Mizo tribe.
... The two major tribes of Manipur i.e. Naga and Kuki-Chin-Mizo are reported to be have different ancestral origins (Cordaux et al., 2004;Maity et al., 2004), but morphologically seem to have a similar South-East Asian ancestry and also speak different languages but under the category of Tibeto-Burman linguistic group. These population groups of Manipur have neither been explored for FTO rs9939609 gene polymorphism nor in association with obesity. ...
Article
The fat mass and obesity associated (FTO) rs9939609 gene polymorphism is most widely studied in terms of obesity in various populations. Recently, the prevalence of obesity has been reported to be very high among the North-Eastern State of India. The major aim of the present study is to understand the extent of FTO rs9939609 gene polymorphism and its association with obesity among the two North-East Indian tribal populations with similar East Asian ancestry. Somatometric data and fasting blood sample were collected from 521 tribal individuals (258 Liangmai and 263 Mizo) of Manipur after obtaining written informed consent. Genotyping of FTO rs9939609 single nucleotide polymorphism (SNP) was done using restriction fragment length polymorphism method for PCR-amplified fragments. Both the presently studied populations were not following Hardy-Weinberg law. The prevalence of obesity and minor allele frequency of FTO rs9939609 polymorphism was found to be significantly higher among the Mizo tribe compared to that of Liangmai. The selected polymorphism was found to be significantly associated with obesity (BMI) only among the Liangmai tribe (Odds ratio-3.0; 95% CI-1.4, 6.4; p-0.003), after adjusting for age and occupation. Age-cohort wise distribution and absolute fitness analysis indicated the lower fitness of minor allele in the higher age group among the Liangmai tribe. To the best of the author's knowledge this is the first study, associating FTO rs9939609 gene polymorphism and obesity in the North-eastern Indian tribal populations with East-Asian ancestry. This study revealed the FTO rs9939609 polymorphism is observed to be associated with obesity only among the Liangmai tribe not among the Mizo tribe. The differential distribution and association observed in the two selected tribes, inhabited in a similar geographical region, could be attributed to differences in their migratory histories in terms of both route and time of settlement.
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