CHAPTER FOUR RESULTS 4.1 Effects of Graded Doses of Curcuma longa on the Reproductive Morphometric Indices of Male Rabbit (Bucks) 4.1.1 Epididymal weights Group C fed with 1,000 mg/kg Curcuma longa...



CHAPTER FOUR



RESULTS



4.1 Effects of Graded Doses of
Curcuma longa

on the Reproductive Morphometric




Indices of Male Rabbit (Bucks)



4.1.1 Epididymal weights


Group C fed with 1,000 mg/kg
Curcuma longa
recorded the highest significant (p ± 0.09 g), while the control (group D) had the lowest (0.92 ± 0.04 g) at day 45 (Table 1). There was no significant (p > 0.05) difference in the mean left epididymal weight of groups A (1.02 ± 0.03 g) and B (1.07 ± 0.02 g), dosed 250 and 500 mg/kg
Curcuma longa
respectively at day 45. There was a significant (p ± 0.04 g) at day 90. The mean left epididymal weight registered for group A (1.09 ± 0.01 g), at day 90, did not differ significantly (p > 0.05) from the control value (0.94 ± 0.04 g). There was an increase in mean left epididymal weight values recorded at day 90 in all the groups. However, group A fed 250 mg/kg of
Curcuma
longa

showed a significant difference (t
= -3.920, p = 0.030).


The mean right epididymal weight result at day 45 followed the same pattern of the mean left epididymal weight at day 45. The control group recorded the lowest significant (p ± 0.05 g) at day 90. The mean right epididymal weights for groups A, B and C fed 250, 500 and 1,000 mg/kg of
Curcuma longa
were 1.07 ± 0.03 g, 1.13 ± 0.09 g and 1.19 ± 0.04 g respectively. There was a significant (p
Curcuma longa
fed groups registered dose dependent increase in mean right epididymal weight (Table 1). The daily comparison of mean right epididymal weights was similar with the mean left epididymal weight results. The mean right epididymal weight values registered at day 90 were higher than the values observed at day 45 in all the groups, and very high significant difference was recorded in group A, fed 250 mg/kg of
Curcuma
longa

(t
= -22.045, p = 0.0001).











Table 1: Effects of graded doses of
Curcuma longa

on the epididymal weights of male rabbit (bucks)














































































Groups / Concentrations (mg/kg)




Epididymal weights (g)




Left








Right




45 days




90 days





t




p-value








45 days




90 days





t




p-value



A (250)



1.02 ± 0.03b



1.09 ± 0.01a



-3.920



0.030*





0.98 ± 0.03b



1.07 ± 0.03b



-22.045



0.0001**



B (500)



1.07 ± 0.02b



1.16 ± 0.10b



-1.457



0.241





1.03 ± 0.03b



1.13 ± 0.09bc



-2.086



0.128



C (1,000)



1.21 ± 0.09c



1.26 ± 0.03c



-1.608



0.206





1.17 ± 0.09c



1.19 ± 0.04c



-0.384



0.727



D (Control)



0.92 ± 0.04a



0.94 ± 0.04a



-0.683



0.544





0.88 ± 0.02a



0.91 ± 0.05a



-1.033



0.378



Mean values with different alphabets as superscript in a column differ significantly (p


Level of significance along rows: * = p











4.2 Testicular
lengths


Group C recorded the highest significant (p ± 0.03 cm) and 90 (3.36 ± 0.02 cm), while group A had the lowest at days 45 (3.22 ± 0.03 cm) and 90 (3.28 ± 0.30 cm) respectively. However, the mean left testicular length of group C did not differ significantly (p > 0.05) from the value registered for group D, the control (3.28 ± 0.06 cm) and group B (3.27 ± 0.03 cm) at day 45 (Table 2). There was an increase in mean left testicular lengths registered at day 90 in all the groups. Nevertheless, the increase recorded a significant difference in all the
Curcuma
longa

fed groups at p


The mean right testicular length at day 45 varied, but did not register any significant (p > 0.05) difference (Table 2). Group A recorded the lowest significant (p ± 0.03 cm) at day 90. The mean right testicular length of groups B (3.27 ± 0.03 cm) and C (3.30 ± 0.00 cm), fed 500 and 1,000 mg/kg
Curcuma longa
respectively and the control (3.27 ± 0.03 cm) did not differ significantly (p > 0.05). All the groups recorded an increase in mean right testicular lengths at day 90. However, group C fed 1,000 mg/kg of
Curcuma
longa

registered a significant difference (t
= -3.372, p = 0.043).
















Table 2: Effects of graded doses of
Curcuma longa

on the testicular

lengths of male rabbit (bucks)














































































Groups / Concentrations (mg/kg)




Testicular
lengths (cm)




Left








Right




45 days




90 days





t




p-value








45 days




90 days





t




p-value



A (250)



3.22 ± 0.03a



3.28 ± 0.30a



-4.373



0.022*





3.17 ± 0.03a



3.22 ± 0.03a



-2.782



0.069



B (500)



3.27 ± 0.03ab



3.33 ± 0.04bc



-3.379



0.043*





3.22 ± 0.03a



3.27 ± 0.03b



-2.875



0.064



C (1,000)



3.29 ± 0.03b



3.36 ± 0.02c



-5.513



0.012*





3.24 ± 0.03a



3.30 ± 0.00b



-3.372



0.043*



D (Control)



3.28 ± 0.06ab



3.31 ± 0.02ab



-0.911



0.429





3.23 ± 0.06a



3.27 ± 0.03b



-0.819



0.473



Mean values with different alphabets as superscript in a column differ significantly (p


Level of significance along rows: * = p















4.3 Testicular
width


There was a significant (p ± 0.02 cm) did not differ significantly (p > 0.05) with the control (1.08 ± 0.02 cm). At day 90, there was also a dose dependent increase in mean left testicular width. But, significant (p ± 0.03 cm). There was no significant (p > 0.05) difference in the mean left testicular width of groups A (1.11 ± 0.02 cm), B (1.15 ± 0.04 cm) and the control (1.12 ± 0.04 cm). There was an increase in mean left testicular width at day 90. The increase showed significant (p
t
= -3.286, p = 0.046) and C (t
= -5.279, p = 0.013) respectively.


There was a dose dependent increase in mean right testicular width of the experimental animals at days 45 and 90 respectively. The days 45 and 90 registered significant (p ± 0.06 cm and 1.35 ± 0.03 cm) respectively. There was no significant (p > 0.05) difference in the mean right testicular width of groups A, B and the control at days 45 and 90 respectively. Interestingly, the mean right testicular width of group A and the control at day 90 were recorded equal (1.14 ± 0.02 cm). There was a gradual increase in mean right testicular width at day 90. However, the increase did not show any significant (p > 0.05) difference between days 45 and 90 in all the groups respectively.







Table 3: Effects of graded doses of
Curcuma longa

on the testicular

width of male rabbit (bucks)














































































Groups / Concentrations (mg/kg)




Testicular
width (cm)




Left








Right




45 days




90 days





t




p-value








45 days




90 days





t




p-value



A (250)



1.06 ± 0.02a



1.11 ± 0.02a



-3.286



0.046*





1.09 ± 0.03a



1.14 ± 0.02a



-2.147



0.121



B (500)



1.11 ± 0.02b



1.15 ± 0.04a



-2.049



0.133





1.14 ± 0.02a



1.19 ± 0.04a



-3.000



0.058



C (1,000)



1.20 ± 0.02c



1.32 ± 0.03b



-5.279



0.013*





1.24 ± 0.06b



1.35 ± 0.03b



-3.071



0.055



D (Control)



1.08 ± 0.02a



1.12 ± 0.04a



-2.460



0.091





1.11 ± 0.03a



1.14 ± 0.02a



-1.287



0.288



Mean values with different alphabets as superscript in a column differ significantly (p


Level of significance along rows: * = p















4.2 Effects of Graded Doses of
Curcuma longa

on the Bucks Hormonal Assays


The mean testosterone was observed significantly (p ± 0.08 mg/dl), followed by group C (4.35 ± 0.22 mg/dl) at day 45. The control (group D) registered the lowest mean testosterone (3.47 ± 0.14 mg/dl), and it did not differ significantly (p > 0.05) from the value recorded for group B (3.57 ± 0.21 mg/dl). There was a significant (p ± 0.04 mg/dl) at day 90 (Table 4). There was an increase in the mean testosterone width at day 90. The mean testosterone increase of
Curcuma
longa

fed groups at day 90 were recorded significantly very high (p


The mean luteinizing hormone (LH) results at days 45 and 90 followed the same pattern of the mean testosterone results at days 45 and 90 respectively (Table 4). There was also an increase in the mean luteinizing hormone at day 90. The increase observed in group A was not significant (p > 0.05). The increase recorded in groups B and C respectively were significantly very high (p = 0.0001), while that of the control was moderate (p = 0.010).










Table 4: Effects of graded doses of
Curcuma longa

on the bucks hormonal assays














































































Groups / Concentrations (mg/kg)




Hormonal assays (mg/dl)




Testosterone








Luteinizing
hormone (LH)




45 days




90 days





t




p-value








45 days




90 days





t




p-value



A (250)



5.57 ± 0.08c



5.86 ± 0.04b



-7.582



0.005**





7.89 ± 0.13c



8.46 ± 0.41b



-2.607



0.080



B (500)



3.57 ± 0.21a



6.73 ± 0.12c



-30.778



0.0001**





5.80 ± 0.11a



10.36 ± 0.06c



-77.635



0.0001**



C (1,000)



4.35 ± 0.22b



8.60 ± 0.12d



-49.686



0.0001**





6.96 ± 0.25b



11.55 ± 0.07d



-40.810



0.0001**



D (Control)



3.47 ± 0.14a



3.81 ± 0.04a



-4.753



0.018*





5.56 ± 0.56a



6.00 ± 0.14a



-5.861



0.010*



Mean values with different alphabets as superscript in a column differ significantly (p


Level of significance along rows: * = p















4.3 Effects of Graded Doses of
Curcuma longa

on the Bucks Cauda Epididymal Sperm




Reserves


The mean paired cauda epididymal sperm count was recorded significantly (p ± 17.04 mg/dl), followed by group B (373.25 ± 10.81 mg/dl) at day 45 (Table 5). The control (group D) registered the lowest mean paired cauda epididymal sperm count (333.25 ± 6.99 mg/dl), and it did not differ significantly (p > 0.05) from the value recorded for group A (342.00 ± 2.58 mg/dl). The mean paired cauda epididymal sperm count of
Curcuma
longa

fed groups at day 45 also showed a dose dependent increase. There was a significant (p ± 2.58 mg/dl) at day 90, and also did not vary significantly (p > 0.05) from the value recorded for group A (353.75 ± 4.65 mg/dl).


There was an increase in the mean paired cauda epididymal sperm count at day 90 (Table 5). The mean paired cauda epididymal sperm count increase of
Curcuma
longa

fed groups at day 90 were recorded significantly very high (p










Table 5: Effects of graded doses of
Curcuma longa

on the bucks cauda epididymal



sperm reserves













































Groups / Concentrations (mg/kg)




Paired cauda epididymal sperm count




45 days




90 days





t




p-value



A (250)



342.00 ± 2.58a



353.75 ± 4.65a



-6.905



0.006**



B (500)



373.25 ± 10.81b



434.75 ± 3.30b



-9.556



0.002**



C (1,000)



380.75 ± 17.04b



454.25 ± 4.11c



-7.687



0.005**



D (Control)



333.25 ± 6.99a



350.00 ± 2.58a



-4.823



0.017*



Mean values with different alphabets as superscript in a column differ significantly (p


Level of significance along rows: * = p




















4.4 Effects of Graded Doses of
Curcuma longa

on the Does Hormonal Assays


The mean female estrogen levels at day 15 varied, but did not show any significant (p > 0.05) difference (Table 6). However, all the
Curcuma longa
fed groups had higher mean estrogen compared with the control (63.21 ± 0.89). At day 45, the control (group D) recorded significantly (p ± 0.57) than the
Curcuma longa
dosed groups, while the 1000 mg/kg fed group (group C) registered the highest (65.72 ± 1.09). Nevertheless, there was no significant (p > 0.05) difference in the mean estrogen levels of
Curcuma longa
fed groups at day 45. There were variations in the mean female estrogen levels between days 15 and 45. The variation only recorded significant difference in group C (t
= -5.002, p = 0.015).


There was a significant (p ± 0.33) and 45 (2.61 ± 0.15) respectively. However, the mean FSH noted for group A, at days 15 (2.55 ± 0.06) and 45 (2.92 ± 0.15), did not differ significantly (p > 0.05) from the values recorded for group D. There was an increase in mean FSH registered at day 45 in all the groups. However, the increase recorded a significant (p








Table 6: Effects of graded doses of
Curcuma longa

on the does hormonal assays








































































Groups / Concentrations (mg/kg)




Estrogen








Follicle stimulating hormone (FSH)




15 days




45 days





t




p-value








15 days




45 days





t




p-value



A (250)



65.26 ± 1.76a



65.20 ± 1.62ab



0.145



0.894





2.55 ± 0.06a



2.92 ± 0.15a



-4.035



0.027*



B (500)



63.77 ± 0.84a



64.28 ± 0.59ab



-1.708



0.186





3.63 ± 0.20b



4.11 ± 0.36b



-2.129



0.123



C (1,000)



64.39 ± 1.46a



65.72 ± 1.09b



-5.002



0.015*





4.75 ± 0.17c



5.08 ± 0.04c



-4.770



0.018*



D (Control)



63.21 ± 0.89a



63.67 ± 0.57a



-0.976



0.401





2.26 ± 0.33a



2.61 ± 0.15a



-3.276



0.047*



Mean values with different alphabets as superscript in a column differ significantly (p


Level of significance along rows: * = p
























4.5 Gestation Lengths of Rabbit Does Fed Graded Doses of
Curcuma longa



Figure 1 represents the gestation lengths of rabbit does fed graded doses of
Curcuma longa. The gestation lengths of groups A, B, C and D (control) feed with 250 mg/kg, 500 mg/kg, 1,000 mg/kg and 0 mg/kg of
Curcuma
longa

were 31.00 ± 0.00, 30.25 ± 0.48, 30.50 ± 0.29 and 30.75 ± 0.25 days respectively. There was no significant (p > 0.05) difference in the mean gestation lengths of the rats between the groups studied.























Figure 1: Gestation lengths of rabbit does fed graded doses of
Curcuma longa
























4.6 Litter Characteristics from Rabbit Does Fed

Graded Doses of
Curcuma longa


Table 7 investigated whether the litter size, pup body weight and crown rump length were modulated by exposure to
Curcuma
longa
. Variations in the mean litter size were observed across the groups to be between 5.25 ± 1.50 to 7.25 ± 0.96. The control group recorded the lowest significant (p < 0.05)="" mean="" litter="" size.="" there="" was="" no="" significant="" (p=""> 0.05) difference in the mean litter size of
Curcuma
longa

feed groups.


Treatment influenced pup body weights. Group C, feed 1,000 mg/kg
Curcuma
longa

recorded the highest significant (p ± 2.57 g). However, the mean pup body weight of all the
Curcuma
longa

feed groups were higher than the value registered for the control. But, the mean pup weights of the groups feed with 250 mg/kg (43.64 ± 1.94 g) and 500 mg/kg (42.58 ± 5.73 g)
Curcuma
longa

did not differ significantly from the control (42.06 ± 1.17 g).


There was an influence of
Curcuma
longa

on the mean crown rump length. Control group had shorter mean crump length (4.19 ± 0.33 cm) compared to the
Curcuma
longa

dosed groups (Table 7). There was a dose dependent decrease in the mean crown rump length. Treatment modulated mean crown rump length with significant difference (p



























Table 7: Litter characteristics from rabbit does fed

graded doses of
Curcuma longa



Mean values with different alphabets as superscripts in a column differ significantly (p










































Groups / Concentrations (mg/kg)







Litter size




Pup body weight (g)




Crown rump length (cm)




Body mass index (g/cm2)



A (250)



5.50 ± 1.29ab



43.64 ± 1.94ab



4.80 ± 0.23c





B (500)



7.25 ± 0.96b



42.58 ± 5.73a



4.74 ± 0.25c





C (1,000)



6.00 ± 0.82ab



44.99 ± 2.57b



4.55 ± 0.25b





D (Control)



5.25 ± 1.50a



42.06 ± 1.17a



4.19 ± 0.33a
















































4.7 Effects of Different Concentrations of


Curcuma longa


Exposure on the Biochemical




Parameters and Mineral Compositions of Rabbit



4.7.1 Effects on

male rabbits (bucks)































































4.7.2 Effects on fem
ale rabbits (does)


Table 9 showed that all the female serum biochemical parameters and mineral compositions sampled were observed significantly (p < 0.05)="" highest="" in="" group="" d="" (control).="" the="" mean="" total="" serum="" cholesterol="" levels="" did="" not="" show="" any="" significant="" (p=""> 0.05) difference among the
Curcuma longa
fed groups. Among the
Curcuma longa
fed groups, group A, feed with 250 mg/kg of
Curcuma longa
registered the highest mean serum triglyceride (92.29 ± 0.92 mg/dl) and malondialdehyde (MDA) (92.33 ± 0.88 μmol/L) levels, while group B, feed with 500 mg/kg of
Curcuma longa
recorded the highest total serum plasma protein (92.79 ± 1.42 mg/dl) with significant (p


The mean mineral calcium and phosphorus did not show any significant (p > 0.05) difference among the
Curcuma longa
feed groups respectively. There was a dose dependent decrease in mean calcium ion concentration.












Table 9: Effects of different concentrations of


Curcuma longa


exposure on the biochemical parameters and mineral




compositions of fem

ale rabbits (does)



























































Groups / Concentrations (mg/kg)




Biochemical parameters (mg/dl)




Mineral compositions (mg/dl)




Total cholesterol




Triglycerides




Total protein




Malondialdehyde (μmol/L)




Calcium




Phosphorus



A (250)



91.23 ± 0.64a



92.29 ± 0.92b



91.36 ± 0.97ab



92.33 ± 0.88b



91.80 ± 0.74a



90.91 ± 1.07a



B (500)



91.63 ± 0.81a



90.73 ± 0.48a



92.79 ± 1.42b



91.26 ± 0.81ab



90.75 ± 0.34a



90.92 ± 0.57a



C (1,000)



90.76 ± 1.43a



91.53 ± 0.50ab



90.63 ± 0.17a



90.68 ± 0.28a



90.65 ± 0.27a



90.69 ± 0.45a



D (Control)



122.56 ± 1.78b



122.32 ± 1.40c



123.01 ± 1.76c



123.40 ± 1.24c



122.77 ± 1.33b



123.09 ± 1.85b



Mean values with different alphabets as superscripts in a column differ significantly (p











4.8 Fasting Blood Sugar Levels of Rabbit Exposed to Graded Doses of
Curcuma longa



The control group recorded the highest significant (p
Curcuma longa
graded dosed groups. There were variations among the
Curcuma longa
feed groups, but significant difference (p


Comparing the fasting blood sugar levels across the days revealed that groups A and B dosed 250 and 500 mg/kg of
Curcuma longa
respectively, and the control group, did not register any significant (p > 0.05) difference. A slight non significant (p > 0.05) duration dependent increase in mean FBS was noted from days 30 to 60, and a significant (p ± 1.42 mg/dL) in group B.





















Table 10: Changes in fasting blood sugar of rabbit exposed to different concentrations of
Curcuma longa
for 90 days


























































Groups / Concentrations (mg/kg)




Fasting blood sugar (mg/dL) / Duration (Days)




15




30




45




60




75




90



A (250)



91.23 ± 0.64a1



92.29 ± 0.92b1



91.80 ± 0.74a1



90.91 ± 1.07a1



91.36 ± 0.97ab1



92.33 ± 0.88b1



B (500)



91.63 ± 0.81a12



90.73 ± 0.48a1



90.75 ± 0.33a1



90.92 ± 0.57a1



92.79 ± 1.42b2



91.26 ± 0.81ab1



C (1,000)



90.76 ± 1.43a1



91.53 ± 0.50ab1



90.65 ± 0.27a1



90.69 ± 0.44a1



90.63 ± 0.17a1



90.68 ± 0.28a1



D (Control)



122.56 ± 1.78b1



122.32 ± 1.40c1



122.77 ± 1.33b1



123.09 ± 0.1.8b1



123.01 ± 1.76c1



123.40 ± 1.24c1



Mean values with different alphabets as superscripts in a column differ significantly (p


Mean values with different numbers as superscripts in a row differ significantly (p











































































































































































Groups / Conc. (mg/kg)




Biochemical parameters (mg/dl)




Total cholesterol




Triglycerides




45




90




t; p-value




45




90




t; p-value



A (250)



106.59 ± 4.19b



62.23 ± 4.15a



16.438; 0.0001



48.44 ± 3.59a



52.25 ± 3.05ab



-0.637; 0.569



B (500)



89.77 ± 14.79ab



77.19 ± 1.47ab



0.876; 0.446



47.44 ± 5.49a



49.73 ± 4.12a



-0.287; 0.793



C (1,000)



103.36 ± 11.23b



88.27 ± 9.18b



1.317; 0.279



53.34 ± 2.71a



46.82 ± 9.24a



0.701; 0.534



D (Control)



68.48 ± 2.29a



70.53 ± 1.46a



-0.548; 0.622



43.96 ± 0.86a



67.43 ± 2.10b



-8.513; 0.003






Total protein




Malondialdehyde (μmol/L)






45




90




t; p-value




45




90




t; p-value



A (250)



5.88 ± 0.08a



6.76 ± 0.06b



-18.932; 0.0001



4.53 ± 0.74a



7.28 ± 1.18b



-4.464; 0.021



B (500)



5.74 ± 0.18a



5.98 ± 0.11a



-1.299; 0.285



4.42 ± 0.83a



3.49 ± 0.48a



0.717; 0.525



C (1,000)



6.16 ± 0.22a



6.29 ± 0.22a



-0.354; 0.747



4.47 ± 0.56a



3.92 ± 0.43a



0.964; 0.406



D (Control)



5.92 ± 0.09a



6.80 ± 0.13b



-8.236; 0.004



4.35 ± 0.53a



3.97 ± 0.25a



0.514; 0.643


















Minerals






Calcium




Phosphorus






45




90




t; p-value




45




90




t; p-value



A (250)



10.09 ± 0.37a



8.65 ± 0.12a



3.423; 0.042



6.47 ± 0.84a



6.88 ± 0.62a



-1.650; 0.198



B (500)



9.77 ± 0.33a



8.82 ± 0.20a



2.708; 0.073



5.50 ± 0.43a



8.17 ± 0.64ab



-5.338; 0.013



C (1,000)



10.18 ± 0.14a



8.89 ± 0.18a



8.473; 0.003



6.67 ± 1.29a



7.90 ± 0.54ab



-0.951; 0.412



D (Control)



9.98 ± 0.11a



8.89 ± 0.08a



15.190; 0.001



5.07 ± 0.33a



8.91 ± 0.51b



-6.664; 0.007





Feb 07, 2021
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